JPS61103491A - Apparatus for feeding predetermined amount of material piece - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a material piece metering device.

[Prior art] Conventionally, this type of device is
As shown in Publication No. 28, a plate is fixed to a material presser foot carrier that is moved relative to the needle on the bed of the sewing machine, and a reciprocating piece □ is fixed to this plate and reciprocated along the -horizontal axis. Some devices are movably installed, and an engaging piece installed at the lower end of the reciprocating piece engages with the band, and the band is moved to a predetermined position by the reciprocating movement.

[Problems to be Solved by the Invention] In the past, the band was fed by mechanical reciprocating motion of a reciprocating piece, so the feeding distance was set constant. However, in the sewing industry, bands of various lengths are required, and for this reason, when adjusting the feeding length of the band, the mechanical reciprocating movement of the reciprocating piece must also be adjusted, which takes time. There were problems such as this.

[Object of the Invention] The present invention was made in order to eliminate the above-mentioned drawbacks, and its purpose is to provide a material size in which the length of the material being fed out can be easily adjusted and the length of the material being fed out has good accuracy. One object of the present invention is to provide a predetermined inquiry device.

[Means for Solving the Problems] The present invention provides: h) a feeding device that feeds out a piece of material in one direction by its operation;
a photodetector comprising a light emitting element and a light receiving element and generating a detection signal when detecting at least the end mark;
a period setting means for setting a regulation period in accordance with the start of operation of the sending device, and setting a delay period in accordance with the generation of the detection signal after the regulation period ends;
Within the regulation period, a sending signal is generated to operate the sending device regardless of the generation of the detection signal, and the sending signal is generated within the delay period, and the sending signal is generated upon the end of the period. It consists of a control device that stops the generation of

[Operation] In the present invention, the period setting means sets a regulation period when the sending device starts operating, and the control device continues to generate the sending signal during the period, despite the generation of the detection signal. On the other hand, the period setting means sets a delay period based on the detection signal generated after the end of the period, and the control device generates the sending signal during the period, and stops generating the sending signal after the end of the delay period.

[Embodiment 1] The details of an embodiment of the present invention will be explained below with reference to the drawings.

In the figure, a feed-out device 1 has a drive roller 4 rotated at a constant speed by a drive motor 2 via a drive belt 3, and a driven roller 5 that cooperates with the drive roller 4 to feed a piece of material A in one direction. It is configured. A drive circuit (not shown) is connected to the drive motor 2, and the drive motor 2 is started or stopped by generation or stop of a sending signal by a control device 20, which will be described later.

A cutting device consisting of a movable blade 8 and a fixed blade 9 is installed on the feeding side of the drive roller 4 of the feeding device 1.
This cutting device is configured to cut the material piece A fed out by the feeding device 1. The material piece A cut by this cutting device is carried onto the work cloth B placed on the bed surface 10 of the sewing machine, and after being held by the presser foot 11, the material piece A is transferred to the needle 12 carrying the upper thread and the bobbin thread. Sewing is performed in cooperation with a holding hook (not shown).

A photodiode 15 as a light projecting element for projecting detection light onto the material piece A, and a light receiving lens 16 for receiving the reflected light are fixed on the feeding side of the driving roller 4 of the feeding device 1. The photodiode 15 and the light receiving lens 16 are integrally formed. An optical fiber 17 is connected to the light receiving lens 16, and the light received by the light receiving lens 16 is transmitted to the phototransistor 13 through the optical fiber 17. This light receiving lens 16
．． The optical fiber 17 and the phototransistor 13 constitute a light receiving element, and together with the light emitting element, a photodetector 18 is constituted.

Here, as shown in FIG. 3, various marks are printed on the surface of the series of material pieces in addition to the end mark E as a cutting line, and the photodetector 18 detects at least the end mark E. It is configured to detect and output a detection signal to the control device 20. Further, the phototransistor 13 is placed outside the influence of noise from the motor 2 via the optical fiber 17.

The first one-shot multivibrator 21 uses one pulse as a regulation signal by its operation to send it to the control device 20.
The output time of the pulse as a regulation period is set by a variable resistor 22.

The second one-shot multivibrator 23 generates one pulse as a delayed signal by its operation, and transmits one pulse to the control device 20.
The output time of the pulse as a delay period is set by a variable resistor 24.

The output terminals of AND gates 25 and 26 are connected to the input terminals of both one-shot multivibrators 21 and 23, respectively, and one input terminal of the AND gates 25 and 26 is connected to the output terminal of the control device 20, respectively. It is connected. Further, the other input terminals of the AND gates 25 and 26 are respectively connected to the power supply VOC.

The period setting means is configured as described above.

-1 control device 20 is constituted by a central processing unit, and starts its operation in response to a start signal from a start switch 27, outputs a feed signal to the feed device 1, and also outputs a feed signal to the first one-shot multi-function device 1. vibrator 21
is configured to operate.

Further, the control device 20 determines whether or not a detection signal is generated from the photodetector 18, and as a result, if the detection signal is not generated or even if the detection signal is generated, the control device 20 determines whether the detection signal is generated from the photodetector 18 or not. When the regulation signal is generated by the one-shot multivibrator 21 of No. 1, the output of the feed signal is continued, but at other times, the output of the feed signal is stopped and the drive motor 2 is stopped. ing.

Furthermore, when the regulation signal is not generated when the detection signal is generated, the control device 20 stops outputting the feed signal and controls the second one-shot multivibrator 2.
It is configured to operate 3. Thereafter, the control device 20 repeatedly determines whether or not the delayed signal is generated, and when the signal 1 is generated, outputs the sending signal to the sending device 1, and when the delayed signal is not generated, the sending signal is output to the sending device 1. It is configured to stop outputting the sending signal.

Next, find the distance between the end marks 1 of the material piece Δ, the cutting point C by the movable blade 8, and the projection position S of the detection light by the photodetector 18.
The effect will be explained in the case where the distance O8 is different from the distance O8.

First, as shown in FIG. 4, a case where the distance between the end marks 1 is shorter than the distance O8 between the cutting point C by the movable blade 8 and the projection position S will be described.

When the material piece is set with its tip aligned with the cutting point C, there is no mark other than the end mark E from the projection position S between the projection position @S and the end mark E on the feeding side. The distance 1sX from the farthest point X where is printed, and the distance 111sE from the projection position S to the nearest end mark E on the sending side are found. This distance S
Time required for sending device 1 to send X, SE T1.7
Let 2 be the regulation period and the delay period, respectively.

After this, the working group is at time T1. When the first and second one-shot multivibrators 21 and 23 are adjusted so that the regulation signal and the delay signal are output during T2, and the start switch 27 is closed, the control device 20 operates as shown in FIG. It works according to the flowchart.

That is, in program step 3o, the control device 20
outputs a sending signal to the sending device 1 and operates the first one-shot multivibrator 21. As a result, the feeding device 1 starts feeding out the material piece, and the first one-shot multivibrator 21 outputs a regulation signal.

In program step 31, the control device 20 determines whether a detection signal is generated or not, and if not, repeats program step 31, and if it is generated, proceeds to program step 32.

In program step 32, the control device 20 determines whether or not a regulation signal has been generated, and if so, the process returns to program step 31, and if not, the process proceeds to program step 33.

In program step 33, the control device 20 stops outputting the sending signal and activates the second one-shot multivibrator 23.

At this time, the feeding device @1 stops feeding the material piece A, and the second one-shot 1-multivibrator 23 outputs a delay signal of a set period.

In program step 34, the controller 20 determines whether a delayed signal is being generated, and if so, the process proceeds to program step 35; if not, the process proceeds to program step 36.

In program step 35, the control device 20 outputs a sending signal to the sending device 1 and in program step 34
Return to At this time, the feeding device 1 starts feeding the material piece A again.

In program step 36, the control device 20 stops the sending signal. As a result, the piece of material A is fed out for a delay period, and the end mark E reaches the cutting point C. After this, the cutting device is activated and the material piece A can be cut to any desired length.

In this way, after the end mark E of the material piece is detected, the material piece is fed out for a delay period, so that no cumulative error occurs.

Further, in this device, as shown in FIG. 5, even when the distance between the enders 91 is larger than the distance *CS, it is possible to feed the endomeres by a predetermined amount in the same manner as described above.

Further, in this device, when the distance between the endomers 91 and the distance O8 are equal, the delay period may be set to zero.

It should be noted that the present invention is not limited to the embodiment described in (e) above, and the control device and the period setting means can be configured by one central processing unit.

Alternatively, the delay period may be set to zero, and the photodetector 18 may be moved and adjusted to match the projection position of the projected light with the end mark.

[Effects of the Invention] Since the present invention is configured as described above, the feeding length of the material piece can be easily adjusted.
(In addition, there is an advantage that the accuracy of the feeding length of the material piece is good because there is no cumulative error associated with the feeding operation.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment embodying the present invention, a block diagram showing its electrical configuration, Fig. 2 is an explanatory diagram of the state installed in a sewing machine, Fig. 3 is a front view of a piece of material, Fig. Figure and 5th
The figure is an explanatory diagram of the regulation period and the delay period, and FIG. 6 is a flowchart showing the main operations of the control device. 1 is a feeding device, 4 is a driving roller, 5 is a driven roller,
8 is a movable blade, 13 is a phototransistor, 15 is a photodiode, 18 is a photodetector, 20 is a control device, 21 is a first
23 is a second one-shot multivibrator.

Claims (1)

[Scope of Claims] 1. A feeding device that is activated by a feeding signal and feeds out a piece of material with at least an end mark attached in one direction; and a feeding device that is installed opposite to the piece of material and that emits a detection light toward the piece of material. a photodetector comprising a light projecting element that projects the projected detection light, a light receiving element that receives the projected detection light and generates a detection signal, and generates the detection signal when detecting at least the end mark; and the sending signal. In the material piece predetermined amount feeding device, the material piece predetermined amount feeding device is equipped with a control device that outputs a signal to the feeding device and stops outputting the feeding signal upon generation of the detection signal, wherein a regulation period is set in conjunction with the start of operation of the feeding device. and a period setting means for setting a delay period in accordance with the generation of the detection signal after the regulation period, and the control device transmits the sending signal within the regulation period regardless of the generation of the detection signal A device for feeding a predetermined amount of material pieces, characterized in that it is configured to generate the feed signal within the delay period and stop generating the feed signal when the delay period ends. 2. The device for feeding a predetermined amount of material pieces according to claim 1, wherein the period setting means is capable of changing the regulation period and the delay period.