JP2800392B2 - Sewing machine with tape feeder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sewing machine with a tape feeder used for garment sewing.

[Prior art] Stretching a stretchable sewing tape such as a rubber tape in a stretched state into a work cloth such as underwear to form an appropriate wavy shape on the work cloth, thereby obtaining a three-dimensional shape and elasticity in the work cloth. The “sewing sewing” which is a sewing method to be given is realized as follows in a conventional sewing machine with a tape feeder.

That is, this is realized by detecting the sewing operation of the sewing machine and adjusting the rotation amount of the tape supply motor so that the tape feed amount is set in advance per stitch. This one
The tape feed amount per stitch may be set not only for one type of work cloth but also for a plurality of types. This is because the sewing section of the work cloth is divided at the time of sewing, and the work is performed while switching the tape feeding amount for each section.

In this case, the number of stitches in each section and the tape feed amount per stitch in each section need to be set in advance as a preparation work.

[Problems to be Solved by the Invention] However, the number of stitches for sewing each section of the work cloth is determined from the relationship between the length of each section and the feed pitch of the sewing machine. Cannot be obtained without measuring. If the section is a curve, the measurement becomes quite troublesome. In addition, depending on the work cloth, a deviation may occur between the mere calculation and the actual sewing, and further adjustment is required.

As described above, in the conventional sewing machine with a tape feeder, the efficiency of the preparation stage of the sewing operation is low, and the productivity of the entire sewing operation is reduced.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a sewing machine with a tape feeder that can efficiently set the number of stitches and the tape feed amount per stitch in each sewing section. Things.

Means for Solving the Problems In order to achieve the above object, a sewing machine with a tape feeder according to the present invention, as illustrated in FIG. A tape supply means for feeding the stretchable sewing tape to the work cloth in synchronization with the feeding cloth; a feed amount setting means for setting a feed amount per stitch of the tape supply means; Set value of quantity,
And a set value storage means for storing a set value of the number of stitches to be combined with the set value of each feed amount, based on a combination of the set values read out in a predetermined order from the set value storage means at the time of sewing. A sewing control unit for adjusting a feed amount per stitch of a tape supply unit according to the number of stitches of a sewing operation, further comprising a sewing section on a work cloth. And a feed amount per stitch set by the feed amount setting means for each section determined based on an instruction from the section change means at the time of trial sewing. And an automatic setting means for storing a combination of the detection values counted by the stitch number detecting means in the set value storing means.

[Operation] The tape feed amount can be obtained from the set value of the feed amount setting means. The set number of stitches of each section on the work cloth is obtained by detecting the actual number of stitches by the automatic setting means at the time of trial sewing. Automatically obtained from the detected number of stitches.

Therefore, the worker actually sews automatically without having to perform a troublesome preparation work of measuring the length of each sewing section of the work cloth and calculating the number of stitches from the measured value. The number of stitches in a state equivalent to the above can be set for each section in combination with the set value of the tape feeding amount.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 2 shows a double-sided decorative sewing machine 1 provided with a tape feeding device. The sewing machine 1 has a drive motor 3
The output is transmitted to a lower shaft 9 disposed on the bed 1a via a belt 5 and a pulley 7, and further output to an arm 1 via a belt 11 and two pulleys 12a and 12b.
The power is transmitted to the main shaft 13 arranged at b. The lower shaft 9 drives a mechanism such as a feed dog and a looper (not shown) provided on the bed 1a. The main shaft 13 drives mechanisms such as a needle 15 and a spreader (not shown) provided on the arm portion 1b. These mechanisms are well-known general ones and will not be described in detail. The rotation speed of the drive motor 3 is adjusted by a motor drive circuit 3b according to the amount of depression of a foot switch 3a provided at the foot of the worker.

A needle position detector 17 composed of a Hall element is provided facing the pulley 7 of the lower shaft 9. This needle position detector 17
By catching the magnetism of the magnet provided on the pulley 7, the fixed position of the needle 15, which is vertically driven in conjunction with the main shaft 13, is detected. The needle position detection signal of the needle position detector 17 is input to the control device 19. A speed detector (not shown) composed of a Hall element is provided near the needle position detector 17, and detects the rotational speed of the main shaft 13 by capturing the magnetism of a plurality of magnets provided on the pulley 7. ing.

A roller A21 and a roller B23 are provided at the tip of the arm 1b. One roller A21 freely rotates, and the other roller B23 is rotated by the pulse motor 25 via the joint 27 and the shaft 29. Therefore, if a stretchable sewing tape, here a rubber tape 31, is supplied and clamped between the rollers A21 and B23 from a tape supply source (not shown) provided above the arm portion 1b, a pulse per stitch is obtained. The rubber tape 31 can be supplied to the sewing position 33 with a supply amount according to the rotation amount of the motor 25 and the radius of the roller B23. At sewing position 33, the third
As shown in the figure, a presser foot 35 attached to the tip of a presser bar (not shown) presses the rubber tape 31 and the work cloth 37 against a needle plate (not shown).

Thus, the rubber tape 31 and the work cloth 37 fed to the sewing position 33 are rotated by the needle 15 provided at the tip of the needle bar 41 which is moved up and down with the rotation of the main shaft 13 and the rotation of the spreader and the lower shaft 9. Accordingly, the sewing is performed in cooperation with a looper (not shown) driven in synchronization with the needle 15, and double-sided decorative sewing is performed. And
It is fed backward on the bed surface 43 by a feed dog not shown.

The control device 19 is configured as a computer, and includes a CPU, an RO
M, RAM (including backup RAM), input / output interface, and bus lines for transmitting signals between them, and the CPU executes predetermined processing according to a processing program stored in ROM. The predetermined processing is performed by inputting signals from the needle position detector 17, the knee switch 45 provided at the position of the worker's knee, and the operation panel 47 via an input / output interface, and based on the input data. Performs the necessary arithmetic processing, executes the various displays on the operation panel 47 via the input / output interface, and outputs a pulse signal for controlling the rotation to the pulse motor.
Output to 25.

The automatic input processing of the set value performed by the CPU in the control device 19 based on the processing program and the data stored in the ROM will be described with reference to the flowchart of FIG.

When the process is started, first, a program number selection request is made (S110). This request is made by displaying it on the operation panel 47. The program number refers to a number indicating the type of the work program, and is not a processing program that describes a processing procedure stored in the ROM. This number selection is performed in order to store the set value to be input from now on for each work, and is selected from nine types.

In response to this request, the operator operates switches on the operation panel 47 to select an appropriate program number. The set value for each section by the subsequent operation is set for this program number.

Next, input of the tape feed amount in the 0th section is requested (S1).
20). The operator also inputs the value by operating switches on the operation panel 47. The 0th section means a section where sewing is actually performed without a work cloth, that is, an empty sewing section. Since it does not affect the sewing finish, an appropriate value may be selected as the tape feed amount in the 0th section, but it is preferable to select a value close to the first section to be set next.
In the example of FIG. 6, it is set to 3.5 mm / 1 stitch. Also,
The number of stitches is not set in the zeroth section because it is an empty sewing section.

Next, "1" is written to a variable N set in a predetermined memory in the RAM indicating the section number (S130).

Next, the input of the tape feed amount in the first section is requested (S140). The operator responds by inputting from the operation panel 47. In the example of FIG. 6, it is set to 3 mm / 1 stitch.

Next, it is determined whether the reset switch on the operation panel 47 has been pressed (S150). If it is pressed, the predetermined memory in the RAM indicating the value of the number of stitches in the first section is cleared to "0" (S160). This is executed when the previously set number of stitches is canceled and reset.

If the reset switch has not been pressed, the next process is executed while the value set for the same section last time is maintained.

Next, the CPU determines whether a hand position detection signal has been detected (S170). If the foot switch 3a is depressed, the needle 15 moves up and down in conjunction with the rotation of the driving motor 3, and sewing is performed. Therefore, a needle position detection signal is output from the needle position detector 17 every time the needle 15 moves up and down. If this signal is detected, the number of stitches in the first section is incremented (S190).

Next, it is determined whether or not the stitch count increase / decrease switch on the operation panel 47 has been pressed to correct the stitch count (S200). When the increase / decrease switch has been pressed, the stitch count correction in the first section is executed. (S210). Here, the operator operates the increase / decrease switch on the operation panel 47 while checking the contents of the operation panel 47 displaying the set number of stitches. Until the desired number of stitches is reached, the increase / decrease switch is repeatedly pressed, and each time the repetition is performed, step 210 is executed to correct the number of stitches.
When the increase side of the increase / decrease switch is pressed, the value of the number of stitches in the first section is incremented, and when the decrease side is pressed, the value is decremented.

When the processing of steps 170 to 210 is repeated, it is determined whether or not the section has been changed (S220). This determination is made based on the operation state of the section change switch or the input end switch on the operation panel 47.

If neither the section change switch nor the input end switch has been pressed, the processing of steps 170 to 210 is repeated again, and the number of stitches is incremented (S190) or corrected by continuing the trial sewing in the same section (S190). S210) is performed.

If it is determined in step 220 that the section change switch has been pressed, it is determined whether the input has been completed (S230). Since this determination is made as to whether or not the input end switch has been pressed, a negative determination is made here, and then the variable N representing the section number is incremented (S240). That is, the first
The processing is switched from the section to the second section. Therefore, at this point, the number of stitches in the first section is determined. In the example of FIG. 6, it is set to 50 stitches.

Then, the processing after step 140 is executed again while changing the section every time the section change switch is pressed.
Thus, a desired combination of the tape feed amount and the number of stitches is set for a desired section. For example, as shown in FIG. 6, the tape feed amount is set to 1.5 mm / 1 stitch and the number of stitches to 15 stitches in the second section, and the tape feed amount is set to 2 mm / 1 stitch and the stitch number in the third section. Set to 30 stitches.

In this way, the setting of each section is completed, and if the operator presses the input end switch, step 220 and step 2 are performed.
An affirmative determination is made in 30 and the process ends.

In the automatic input process described above, the input of the tape feed amount (S1
20, S140), increment of the number of stitches by trial sewing (S19)
0) and correction of the number of stitches (S210) can be performed. Of course, only one or two arbitrary processes can be executed by an input operation from the operation panel 47. It is also possible to end.

Since the tape feed amount and the number of stitches set in this way are set while checking the finish by trial sewing,
When sewing work is automatically performed based on the set value,
Almost the desired finish can be achieved.

Next, a playback process executed by the control device 19 for automatic sewing based on the data set as described above will be described. The flow chart is shown in FIG.

First, a selection of a program number is requested (S310), and the operator inputs the program number via the operation panel 47. The set values of the tape feeding amount and the number of stitches for each program number are stored in the RAM in the control device 19 by the above-described automatic input processing. Therefore, by selecting the program number, a corresponding series of set values of the tape feed amount and the number of stitches are read out to the working RAMA area. For example, the sixth
A series of set values shown in the figure are read.

Next, when the foot switch 3a is operated by the operator and the drive motor 3 starts rotating, the pulse motor 25 is driven by the tape feed amount in the zeroth section every time the needle position is detected. (S320). In the example of FIG. 6, the pulse motor 25 feeds the rubber tape 31 by 3.5 mm in response to a needle position detection signal generated from the needle position detector 17 for each needle.

Next, it is determined whether the knee switch 45 has been pressed (S33).
0), if it is not pressed, the tape feeding process in the 0th section (S320) is repeated.

As shown in FIG. 6, when the knee switch 45 is turned on, the variable N is set to "1" (S340). That is, the execution of the first section processing is set.

Next, the stitch number counter NC provided in the RAM is cleared (S350).

Next, in accordance with the detection of the needle position, the pulse motor 25 is driven so that the tape feed amount in the first section is obtained (S360).
In the example of FIG. 6, the rubber tape 31 is fed by 3 mm for each stitch.

Next, the stitch number counter NC is incremented (S3
70).

Next, it is determined from the value of the stitch number counter NC whether sewing has been completed for the number of stitches set in the first section (S38).
0). In FIG. 6, it is determined whether or not the sewing for the first section has been completed for 50 stitches. If not,
Steps 360 and 370 are repeated.

If the sewing for the set number of stitches has been completed and the affirmative determination is made in step 380, it is next determined whether or not the sewing for all the sections has been completed (S390). If the section where the set value exists still exists, the variable N is incremented (S400),
Move to the next section. Then, the process is repeated again from step 350, and the sewing is performed with the tape feeding amount and the number of stitches set for each section. In FIG. 6, the second section is 1
Fifteen needles of the rubber tape 31 are fed by 1.5 mm for each needle, and thirty needles of the rubber tape 31 are fed by 2 mm for each needle in the third section.

When the sewing of all sections is completed in this way, an affirmative determination is made in step 390, and the process returns to step 320 to proceed to the sewing process of the next work cloth 37.

In this way, the same sewing process is continuously performed on the plurality of work cloths 37. When the sewing process is to be ended, the playback process can be ended by inputting an end signal or a mode change signal to another process from the operation panel 47.

In the present embodiment, as described above, the number of stitches can be set while confirming the finish by trial sewing.
Accurate data can be set easily. In addition, if the correction can be performed with a switch, the correction can be performed again by performing trial sewing, and it can be corrected easily and accurately. Therefore, the labor in the preparation stage of the sewing work is reduced,
Overall productivity is improved.

Effects of the Invention As described in detail above, in the present invention, the number of stitches required for each section is automatically stored by actually executing the trial sewing.

For this reason, it is possible to automatically set the length of each sewing section of the work cloth without performing a troublesome preparatory work of measuring the length of each sewing section of the work cloth and calculating the number of stitches from the measured value. .

Therefore, the preparation work of the sewing work becomes efficient, and the productivity of the entire sewing work can be improved.

[Brief description of the drawings]

FIG. 1 is a basic illustration of the present invention, FIG. 2 is a block diagram of a main part of a sewing machine provided with a tape feeder, FIG. 3 is a side view showing the vicinity of a sewing position, and FIG. FIG. 5 is a flowchart showing a playback process, and FIG. 6 is an explanatory diagram showing the switching of sections and the contents of set values in each section. 1 ... double-sided decorative sewing machine 3 ... drive motor 3a ... foot switch 9 ... lower shaft 13 ... main shaft 15 ... needle 17 ... needle position detector 19 ... control Equipment, 25: Pulse motor, 31: Rubber tape, 37: Work cloth, 45: Knee switch, 47: Operation panel

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mamoru Suzuda 9-35, Horita-dori, Mizuho-ku, Nagoya, Aichi Prefecture Inside Brother Industries, Ltd. (72) Inventor Hiroyasu Iwakoshi 9-35, Horita-dori, Mizuho-ku, Nagoya, Aichi, Japan Address Brother Industries, Ltd. (56) References JP-A-56-136592 (JP, A) JP-A-63-164990 (JP, A) JP-A-62-213792 (JP, A) JP-A-3- 75086 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) D05B 35/00-35/12

Claims (1)

(57) [Claims] 1. A number-of-stitches detecting means for counting the number of stitches in a sewing operation; a tape supply means for feeding an elastic sewing tape to a work cloth in synchronization with a sewing operation; Feed amount setting means for setting a feed amount; and a set value storage for storing a plurality of set values of the feed amount set in advance and a set value of the number of stitches combined with each set value of the feed amount. Means for adjusting the feed amount per stitch of the tape supply means according to the number of stitches of the sewing operation based on a combination of the set values read out in a predetermined order from the set value storage means at the time of sewing. A sewing machine with a tape feeding device, comprising: a sewing machine with a tape feeding device; and a section changing means for instructing switching of a sewing section on the work cloth. For each section determined by Automatic setting means for storing, in the set value storage means, a combination of the feed amount per stitch set by the feed rate setting means and the detection value counted by the stitch number detecting means. A sewing machine with a tape feeding device.