JPH06296788A - Control device for feed lifting sewing machine - Google Patents

Abstract

PURPOSE:To easily regenerate the sewing operation by a skilled person by detecting the control of feed lifting pitch and control of sewing speed by a worker, and storing and regenerating them. CONSTITUTION:A feed lifting sewing machine having a lifting means is constituted in such a manner that the pitch of the walking means M3 is linearly changed according to the input degree by a pitch changing input means M4 for changing the lifting pitch. This sewing machine is further provided with an input degree detecting means M5 for detecting the input degree; a length related quantity detecting means M6 for detecting the length related quantity from sewing start when a change of input degree is detected; a sewing speed detecting means M10 for detecting the sewing speed when the change of input degree is detected; a memory means M7 for storing the detection result by each detecting means; and a regenerated sewing control means M8 for conducting a regenerated sewing by changing the lifting pitch and the sewing speed in conformation to the length related quantity from sewing start on the basis of the detection result stored in the memory means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a vertical feed sewing machine which is used when performing sew-in sewing or sewing a material which is difficult to feed.

[0002]

2. Description of the Related Art Conventionally, this type of vertical feed sewing machine has been used for performing so-called sewage stitching, which is necessary for sewing sleeves, and for sewing materials that are difficult to feed. In particular, as a technique for easily carrying out false stitching, for example, as disclosed in Japanese Patent Laid-Open No. 1-308586, in a teaching mode, an operator instructs a process section in which "fake" is inserted, and the number of stitches at that time A method is known in which it is detected and stored in memory, and is used by playing back it in lock stitch sewing.

[0003]

However, in the sewing machine of the system as disclosed in the above-mentioned Japanese Patent Laid-Open No. 1-308586, it is the process section in which the operator gives an instruction for "Ise". Although the degree of change in the amount of bulge at that time is calculated internally so that it will eventually change to a preset amount of bulge, it is not possible to reach the level manually performed by a skilled person. It takes a lot of trial and error to develop the algorithm for changing the amount of dust, and another algorithm must be prepared depending on the conditions such as the material, sewing speed, type of feed dog used, etc. There is a problem.

Further, in the case of applications other than imposing, that is, when sewing is performed while slightly changing the upper feed amount and the material ends are matched or puckering (sewn lines) is reduced, as described above. It cannot be handled by the method. In view of such problems, an object of the present invention is to easily reproduce the sewing operation performed by a skilled person by detecting, storing and reproducing the control of the upper feed pitch and the control of the sewing speed by the operator. To do.

[0005]

A control device for a vertical feed sewing machine according to claim 1, which is formed to achieve the above object, is a presser for sewing and transferring a sewn product, as shown in FIG. In the vertical feed sewing machine, which comprises, in addition to the means M1 and the lower feed means M2, an upper feed means M3 which is driven in synchronization with the lower feed means M2 and whose pitch can be set independently of the lower feed means M2, A pitch changing input means M4 for changing the pitch of the upper feed by the means M3 is provided, and the pitch of the upper feed means M3 is linearly changed according to the degree of input by the pitch changing input means M4. At the same time, the input degree detecting means M5 for detecting the input degree by the pitch changing input means M4, and the sewing when the change in the input degree is detected by the input degree detecting means M5 The length-related amount detection means M6 for detecting the length-related amount from the beginning, the storage means M7 for storing the detection results by the detection means M5, M6, and the detection results stored in the storage means M7 Based on the above, based on the length-related amount from the start of sewing, the reed sewing control means M8 for replay sewing is performed by changing the upper feed pitch,
It is characterized by having.

The length-related amount from the start of sewing may be the sewing length itself from the start of actual sewing,
It may also be a physical quantity that reflects the sewing length, such as the (cumulative) number of stitches from the start of sewing. Further, the control device for the vertical feed sewing machine according to claim 2 is, as illustrated in FIG.
In addition to the pressing means M1 and the lower feeding means M2 for sewing and transferring the sewn product, the upper feeding means M3 that is driven in synchronization with the lower feeding means M2 and can set the pitch independently of the lower feeding means M2, And speed adjusting means M9 for changing the sewing speed
A vertical feed sewing machine including
Has a pitch change input means M4 for changing the pitch of the upper feed, and the pitch of the upper feed means M3 is linearly changed according to the degree of input by the pitch change input means M4. At the same time, an input degree detecting means M5 for detecting the degree of input by the pitch changing input means M4, and a length-related amount from the start of sewing when the change of the input degree is detected by the input degree detecting means M5 are detected. The length-related amount detecting means M6 and the sewing speed detecting means M10 for detecting the sewing speed when the change in the input degree is detected by the input degree detecting means M5.
Based on the detection result stored in the storage means M7 and the storage result stored in the storage means M7, the storage means M7 stores the detection result by the detection means M5, M6, M10. Reproduction sewing control means M8 for performing reproduction sewing by changing the upper feed pitch and the sewing speed,
It is characterized by having.

[0007]

According to the control device for the vertical feed sewing machine according to the first aspect of the present invention constructed as described above, the pitch changing input means M4 (for example, a foot pedal) for changing the upper feed pitch during sewing work is used. When properly adjusted by the person
The feed pitch by the upper feed means M3 changes. And
The input degree detection means M5 detects the degree of input by the pitch change input means M4, and the length-related amount from the start of sewing when the change of the input degree is detected by the input degree detection means M5 is length-related. The amount detecting means M6 detects.
The storage means M7 stores the detection results of these detection means M5 and M6, and the reproduction sewing control means M8 responds to the length-related amount from the start of sewing based on the detection results stored in the storage means M7. Then, the upper feed pitch is changed to perform regenerative sewing. Therefore, for example, if a skilled person memorizes a series of operations related to the upper feed pitch such as putting in a sham and adjusting the material end by the input degree and the length related amount from the start of sewing, based on that information, The sewing control similar to that of a skilled person can be reproduced.

The vertical feed sewing machine according to a second aspect of the invention is also provided with speed adjusting means M9 (for example, a speed adjusting pedal or the like) for changing the sewing speed, and the sewing speed is changed when the operator operates it during the sewing work. To do. Therefore, according to this control device, the sewing speed detecting means M10 detects the sewing speed when the change of the input degree by the pitch changing input means M4 is detected, and the input degree detection described in claim 1 is also performed. In addition to the detection results of the means M5 and the length-related amount detection M6, the storage means M7 also stores the detection result of the sewing speed detection means M10. Then, the reproduction sewing control means M8 changes the upper feed pitch and the sewing speed in accordance with the length-related amount from the start of sewing, based on the detection result stored in the storage means M7, thereby performing the reproduction sewing. for that reason,
For example, fine control of the upper feed pitch performed by an expert,
The control of sewing speed can be reproduced as it is.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a schematic configuration diagram of the sewing machine of this embodiment, and FIG. 4 is a mechanical configuration diagram of the sewing machine head. In FIG. 3, the sewing machine head 1 is mounted on a sewing machine table 2, and the sewing machine table 2 is provided with an operation panel 110, a power switch 120, and a control box 130. An electronic control unit ECU described later is provided in the control box 130.
Is stored. Further, two foot pedals are provided on the foot side of the sewing machine table 2, and one pedal is the first pedal 1 for starting and stopping the sewing machine motor.
40. The speed of the sewing machine motor can be adjusted by adjusting how much the first pedal 140 is depressed. The other pedal is the second pedal 150 for adjusting the upper feed pitch, and the upper feed pitch can be adjusted by adjusting the amount of depression and depression of the second pedal 150. These pedals 140 and 150 are provided with a mechanism for detecting the amount of depression. As the detection mechanism, for example, a device that detects the amount of rotation of the pedals 140 and 150, or a device that connects a wire or rod (not shown) to the pedals 140 and 150 and detects the amount of pulling, for example, is appropriately adopted. To be done.

Next, the mechanical structure of the sewing machine head will be described with reference to FIG. It should be noted that reference numerals are given only to portions that are deeply related to the present invention. The sewing machine head 1 is roughly composed of an arm portion 5 and a bed portion 10. The arm portion 5 is provided with a main shaft 17 through which the rotational power of the sewing machine motor 190 (not shown in FIG. 4) is transmitted via the belt 13 and the pulley 15. An operating shaft 20 is connected to the main shaft 17 via a crank rod 19 or the like, and an operating shaft 35 is connected to the main shaft 17 via a crank rod 32 or the like.
Then, the upper feed dog 30 is configured to perform four-motion feed of ascending → forward → downward → reverse by the rotational movement of the operating shaft 20 and the operating shaft 35 synchronized with the rotation of the main shaft 17.

The amount of movement of the upper feed dog 30 in the front-rear direction, that is, the amount of upper feed is determined by the amount of rotation of the operating shaft 35. The link 47 connected to the actuating shaft 35 is connected to the upper feed amount adjusting unit 48 fitted and fixed to one end of the rotating shaft 50, and the upper feed amount adjusting unit 48 tilts the link 47. To change the swing amount of the operating shaft 35. Crank rod 3 mentioned above
2, eccentric cam 33, link 47, upper feed amount adjusting unit 48
An upper feed amount adjuster 51 is configured from the rotating shaft 50.

A rotating lever 61 is fixed to the other end of the rotating shaft 50. The rotation lever 61 has a two-arm shape centering on the rotation shaft 50, and one arm portion thereof abuts on a locking portion 59 attached to the drive shaft 58. The drive shaft 58 to which the locking portion 59 is attached is connected to the output shaft 56 of the pulse motor 55. Therefore,
By controlling the rotation amount of the pulse motor 55, the locking portion 59,
The upper feed amount is adjusted by controlling the rotation angle of the rotation shaft 50 via the rotation lever 61.

On the other hand, the bed 10 has a horizontal feed shaft 67,
A vertical feed shaft 69 is provided and a lower feed amount adjuster 78 is provided.
The feed amount is adjusted by, and the lower feed dog 65 is fed by four movements like the upper feed tooth 30. The sewn product is transferred by the upper and lower feed dogs 30 and 65, and the upper and lower feed amount adjusters 51 and 78 respectively adjust the vertical feed amounts to feed the fabric while adjusting the speed difference between the upper and lower work cloths (not shown). It is configured to be able to.

At the seam forming portion, the feed is applied to the two work cloths (not shown) fed under the presser foot 89, and the sewing needle (not shown) and the thread catcher 94 are provided. A lock stitch is formed by cooperation. Next, the electrical configuration of this embodiment will be described with reference to FIG.

The electronic control unit ECU is a well-known CPU 20.
0, ROM 210, and RAM 220. The timer 230 generates a reference pulse and is used when obtaining a sewing speed which will be described later. The output of the second pedal 150 for adjusting the upper feed pitch, that is, the amount of stepping, passes through the potentiometer 250, is converted into a digital value through the A / D converter 260, and is input to the CPU 200.
The CPU 200 gives the above-mentioned command amount for driving the pulse motor 55 for the upper feed drive to the pulse motor control circuit 270 for the upper feed drive based on this value. As a result, the pitch of the upper feed can be adjusted by adjusting the amount of depression of the second pedal 150.

The upper feed pitch can also be set by inputting from the operation panel 110. Other,
The operation panel 110 can be used to set whether or not the mode is the playback mode. Starting, stopping, and speed control of the sewing machine motor 190 are performed by the first pedal 140 and the sewing machine motor control circuit 280. Although not shown, an encoder that generates a pulse in synchronization with the rotation of the main shaft 17 is provided in the sewing machine head 1, and its output is input to the CPU 200 through the sewing machine motor control circuit 280. The CPU 200 detects the sewing speed by measuring the number of pulses generated within the reference time using the output pulse from the encoder and the timer 230. Further, the sewing machine motor control circuit 280 is configured to be able to control the rotation speed of the sewing machine motor 190 according to a command from the CPU.

The operation of the vertical feed sewing machine of the present embodiment constructed as above will be described with reference to the flow charts of FIGS. The worker presses the work clamp foot 8 in the start process of step 100 (hereinafter, step is referred to as S).
9 is raised to set the sewn product to prepare for the start of sewing. Then, it is determined whether or not the sewing this time is the playback mode, and the setting is made by the operation panel 110. All the above processes are collectively referred to as a start process.

First, when the playback mode is not set (S
110: NO) will be described. First, the operator sets the initial upper feed amount corresponding to the upper feed amount at the start of sewing on the operation panel 1
Set by 10. Therefore, when the set initial upper feed amount is read (S120) and the first pedal 140 is depressed (S130: YES), the sewing machine motor 19
0 is started to start sewing (S140). S130
It is determined whether the first pedal 140 is depressed by the CPU 200 through the sewing machine motor control circuit 280.
Can know.

Then, it is judged whether or not there is a change in the input (stepping amount) from the second pedal 150 (S150), and if there is a change, the number of stitches at that time, that is, the cumulative number of stitches from the start of sewing, The amount of depression of the second pedal 150 and the sewing speed are stored (S160). Then, this time, it is determined whether or not the sewing speed has changed (S170), and if there is a change, the number of stitches at that time, the depression amount of the second pedal 150, and the sewing speed are stored (S180).

FIG. 9 shows an example of changes in the upper feed pitch and the sewing speed. Here, it is assumed that sewing is started when the number of stitches is a. At this time, the initial upward feed starts with the set value U.
During sewing, the upper feed pitch and the sewing speed are changed as shown in FIG. 9 depending on how much the operator depresses the first pedal 140 and the second pedal 150.
Shall be changed as follows. Since the sewing speed changes in the section from a to a1, the upper feed pitch, the sewing speed, and the number of stitches at that time are stored for each stitch (S17).
Processing 0, 180). In the section from a1 to b, neither the upper feed pitch nor the sewing speed is changed, so that it is not stored internally. However, since the upper feed pitch changes in the section from b to c, the number of stitches at that time, the upper feed pitch (actually, the depression amount of the second pedal 150), and the sewing speed are stored for each stitch (S150). , 160).

Next, since the upper feed pitch and the sewing speed have not changed in the sections c to d, the state is not stored. Next, in the section of d to e, since the upper feed pitch is changed again, the processes of S150 and 160 are performed. In the section from e to f, there is no change in the upper feed pitch and the sewing speed again, so the state is not stored. Since the upper feed pitch and the sewing speed are both changed in the section f to g, the processes of S150 to S180 are performed, and the number of stitches, the upper feed pitch, and the sewing speed are stored. In the section from g to h, only the sewing speed is changed this time, and therefore the processes of S170 and 180 are performed again. When the first pedal 140 is released after reaching h, the sewing machine stop process (S200) is performed.

Then, the operator sets the data registration through the operation panel 110 if the sewing result at this time is satisfactory and the operator wants to play back and use the sewing machine thereafter. Then, the CPU 200 stores the change in the upper feed pitch, the change in the sewing speed, and the number of stitches at that time, which are stored in this sewing, in the data area for playback sewing set in the RAM 220 (S210, 220). For example, if the upper feed pitch is sufficiently large, as in the section from b to e in FIG. 9, “fake” will be entered. With the above, the sewing sequence in the case of non-playback sewing is completed.

The change in the upper feed pitch and the change in the sewing speed are stored for each sewing, and if not registered for playback (S210: NO) S10
After returning to 0, the following processing is performed. That is, if it is not registered, it will be updated every time.

Next, with reference to FIG. 8, a description will be given of the processing when it is judged in the playback mode in S110. If the playback mode is determined, S300 of FIG.
In step S300, it is determined whether or not the data for performing playback sewing has already been registered. If not registered (S300: NO), an error is displayed on the operation panel 110, and some notification is given to the operator. Do (S3
60), this process is once ended.

On the other hand, if there is data for playback in S300, the player waits for the operator to step on the first pedal 140 by entering the standby state for playback sewing. First
When the pedal 140 is depressed (S310: YES), the sewing machine is activated (S320), and the upper feed pitch and the sewing speed are changed according to the number of stitches based on the data registered for playback (S330). Control of sewing speed is C
This is performed by the PU 200 issuing a command to the sewing machine motor control circuit 280.

Then, when the planned number of stitches (total number of stitches) of the data registered for playback is completed (S340:
YES), the CPU 200 determines that the sewing machine motor control circuit 280
A sewing machine stop command is issued to stop the sewing machine motor 190. After that, thread trimming, lifting, etc.,
A series of sewing machine stop processing (S350) ends.

As described above in detail, the vertical feed sewing machine having the control device of the present embodiment is constructed so that the upper feed pitch control and the sewing speed control of the sewing machine can always be detected and the movement thereof can be played back. ing. Therefore, for example, if a skilled person memorizes a series of operations related to the upper feed pitch such as putting in a sham and adjusting the material end by the input degree and the length related amount from the start of sewing, based on that information, The sewing control similar to that of a skilled person can be reproduced. Therefore, the excellent effect that the fine control, the upper feed pitch control, and the sewing speed control performed by a skilled person can be reproduced as it is is exhibited.

Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and it goes without saying that the present invention can be implemented in various modes without departing from the spirit of the present invention. . For example, in the present embodiment, it is explained that the number of registration data for playback is one, but a plurality of registration data may be possible and may be editable on the operation panel. Further, by providing the external storage device in the sewing machine of the present embodiment, it is possible to take out the data for playback created by a skilled person to the outside, for example, by re-registering the data in the sewing machine operated by a beginner. Even a beginner can sew the same as an expert. Further, in the above embodiment, the cumulative number of stitches from the start of sewing is used as the length-related amount from the start of sewing, but the number of reference pulses from the timer 230 is counted under the condition that the sewing speed is constant, and the sewing length is May be associated with

[0029]

As described above in detail, the vertical feed sewing machine of the present invention is constructed so that the upper feed pitch control of the sewing machine and the sewing speed control can always be detected and the movement thereof can be played back. The excellent effect of being able to reproduce the fine control of the upper feed pitch and the control of the sewing speed performed by the operator as it is is demonstrated.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram illustrating a basic configuration of the invention according to claim 1.

FIG. 2 is a schematic configuration diagram illustrating a basic configuration of the invention according to claim 2;

FIG. 3 is a schematic external view of a vertical feed sewing machine according to the present embodiment.

FIG. 4 is a mechanical structural diagram of the head of the vertical feed sewing machine according to the present embodiment.

FIG. 5 is a block diagram showing an electrical configuration of a vertical feed sewing machine of the embodiment.

FIG. 6 is a flowchart showing the first half of the operation of the vertical feed sewing machine of the embodiment.

FIG. 7 is a flowchart showing the latter half of the operation of the vertical feed sewing machine of the embodiment.

FIG. 8 is a flowchart showing a process when it is determined to be a playback mode in the operation of the vertical feed sewing machine of the embodiment.

FIG. 9 is a graph showing an example of changes in the upper feed pitch and the sewing speed of the vertical feed sewing machine according to the embodiment.

[Explanation of symbols]

M1 ... pressing means, M2 ... lower feed means,
M3 ... upper feed means, M4 ... pitch change input means,
M5 ... Input degree detection means, M6 ... Length related amount detection,
M6 ... Length-related amount detection means, M7 ... Storage means, M8 ... Reproduction sewing control means,
M9 ... speed adjusting means, M10 ... sewing speed detecting means, ECU ... electronic control unit, 1 ... sewing machine head, 51 ... upper feed amount adjuster, 55 ... pulse motor, 65 ... lower feed dog, 78 ... lower feed amount adjustment Container, 89 ... cloth presser foot, 110 ... operation panel,
130 ... Control box, 140 ... First pedal, 150
... second pedal, 190 ... sewing machine motor, 270 ... upper feed drive pulse motor control circuit, 280 ... sewing machine motor control circuit

Claims (2)

[Claims] 1. In addition to a pressing means and a lower feed means for sewing and transferring a sewn product, an upper feed means that is driven in synchronization with the lower feed means and can set a pitch independently of the lower feed means. In a vertical feed sewing machine having the above-mentioned, it has a pitch change input means for changing the pitch of the upper feed by the upper feed means, and the pitch of the upper feed means is linear according to the degree of input by the pitch change input means. Input degree detecting means for detecting the input degree by the pitch changing input means, and a length from the start of sewing when the change of the input degree is detected by the input degree detecting means. Length-related amount detecting means for detecting the length-related amount, storage means for storing the detection results of the respective detecting means, and whether sewing is started based on the detection results stored in the storage means. Controller of the upper and lower feed sewing machine, characterized by comprising a reproduction sewing control means for causing the reproduction sewing by changing the on feed pitch corresponding to the length-related quantity of. 2. In addition to a pressing means and a lower feed means for sewing and transferring a sewn product, an upper feed means that is driven in synchronization with the lower feed means and can set a pitch independently of the lower feed means, And a vertical feed sewing machine provided with speed adjusting means for changing the sewing speed, having pitch changing input means for changing the pitch of the upper feed by the upper feed means, and adjusting the degree of input by the pitch change input means. In accordance with the pitch of the upper feed means is changed linearly, the input degree detecting means for detecting the input degree by the pitch changing input means, and the change of the input degree by the input degree detecting means. A length-related amount detecting means for detecting a length-related amount from the start of sewing when detected, and a sewing operation when the change of the input degree is detected by the input degree detecting means. Sewing speed detecting means for detecting the speed, storage means for storing the detection results by the respective detecting means, and corresponding to the length-related amount from the start of sewing based on the detection results stored in the storage means. A control device for a vertical feed sewing machine, comprising: a reproduction sewing control means for performing reproduction sewing by changing the upper feed pitch and the sewing speed.