JPS61131787A - Follower control sewing machine - 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 Field of Application] The present invention relates to a sewing machine that sews, for example, a label, a patch, etc. onto a predetermined workpiece by tracing control along its contour.

[Conventional technology]

For example, when mass producing clothing etc. in a sewing factory,
Conventionally, the work of sewing labels, patches, etc. onto products uses a numerically controlled sewing machine. Depending on the shape of the object to be sewn, the sewing shape is input using a digitizer, etc., and needle movement data is created, which can then be programmed. This data was stored in a ROM, floppy disk, etc., and actual sewing was performed according to this data.

[Problem that the invention seeks to solve]

However, in the conventional methods as described above, as the shape to be sewn becomes more complex, it takes considerable effort and time to create the program, and the peripheral devices that control the program also tend to become more complex.

Furthermore, since the objects to be sewn, such as labels and patches, have variations in shape and deviations in set position, it is not possible to accurately form a predetermined stitch in a constant position using constant needle movement data provided by a program. This poses a problem in that it is difficult to stabilize the sewing quality.

In order to improve these shortcomings, for example,
Publication No. 8199 discloses a "copycat/control sewing machine," but this cited example does not require programming;
Instead, there was a drawback that it was necessary to make a copy of the il-shaped hood each time.

This invention has been made in view of the above-mentioned problems, and is configured to detect the contour shape of the object to be sewn using a sensor and sew at a certain distance from it without the need to create a program in advance. The purpose is to

[Failure to solve the problem]

For this reason, in the present invention, a plurality of sensors are used to detect the edge of the cloth or the stepped portion of the cloth outline of the object to be sewn, and sewing is performed by following the contour a certain distance from the detected portion.

〔Example〕

The present invention will be explained below based on examples.

FIG. 1 is a perspective view of essential parts of an embodiment of a copying control device according to the present invention. L is an object to be sewn such as a label (hereinafter referred to as a label), and W is a work such as clothing to which it is sewn. In addition, 1 is the bed of the sewing machine, 2.3 is an upper presser foot and a presser foot base on the lower surface of the workpiece, which respectively restrain the workpiece W, 4 is a presser foot for the workpiece, and 5 is symmetrical about the needle 6 position of the sewing machine. A pair of arranged sensor groups 5a,
It is 5b. Each of these sensor groups consists of four sensors S, as shown in FIG.
The reflected light from the workpiece cloth W or the label L of the light projected from the projector is detected separately, and the X and Y direction feed control signals for the workpiece W are generated based on the combination of the detection signals of each sensor to move the workpiece W. Send in a specified direction. FIG. 3 shows a block diagram of a circuit 12 that controls the scanning motors 18 and 14 that use this detection signal 10 to drive the workpiece Wtl to be fed in the X direction and the Y direction, respectively, via the microconbeater 11. .

In FIG. 4(a)'-<g'), the workpiece/label detection classification of each sensor element for forming the label Ll17) suture x f y f ST is represented by ○/・, respectively.
The above-mentioned sensing division of each sensor element at each edge/corner of the rectangular level L and the X and Y direction transport of the workpiece W according to FIG.

The relationship with each other is indicated by an arrow. The X mark at the tip of the arrow indicates a temporary stopped state. Numerical control sewing machine microcombita 1
1, the workpiece W is detected by the signal from the combination of the valley sensor outputs.
is programmed to drive in predetermined X and Y directions.

Note that this sensor may be replaced with an image sensor made of bundled optical fibers.

[For production]

The operation of the above configuration is obvious from FIGS. 4(a) to (g), and each sensor element according to the present invention
Sewing can be completed by following the label outline regardless of variations in the shape of the label or the setting position, and good sewing quality can be obtained.

[Other Examples]

Embodiments according to the present invention are not limited to the examples shown in FIGS. 1 and 4, and the arrangement of the sensor groups may be a single sensor group instead of the pair of sensor groups in the above embodiments. Two examples are shown in FIGS. 2(b) and 2(c). FIG. 5 is a diagram corresponding to FIG. 4 of the sensor group of FIG. 4 shown in FIG. 2(b), and the operation is similar, so repeated explanation will be omitted.

Furthermore, although the sensor S in the above embodiment has been described as a photosensor, this sensor is not limited to a photoelectric type, and it goes without saying that it may be based on ultrasonic waves or other types. In addition, the number of sensor elements can be increased by increasing the number of sensor elements as shown in FIG. 2 (C), for example, as shown in FIG. It can also be applied to objects with different shapes.

[Effects of the Invention] As explained above, according to the copying control sewing machine of the present invention, there is no need for advance programs or copying patterns, so the man-hours and time for creating and managing them can be saved, and costs can be reduced. Since it is possible to accurately sew at a constant distance from the edge of the workpiece regardless of the contour shape of the workpiece or variations in the set, good sewing quality can be obtained without special knowledge/skills.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part of an embodiment of a scanning control device according to the present invention, FIG. 2(a) is an explanatory diagram of sensor elements thereof,
Figures b) and (C) are diagrams of other sensor element arrangement embodiments, Figure 3 is a block diagram of the workpiece drive control circuit, and Figure 4 (a).
-(B) are diagrams showing the relationship between the detection classification of each sensor element and the drive control direction of the workpiece, and FIG. 5 is a diagram corresponding to FIG. 4 in the case of FIG. 2(b). 1 ...... Bed 2 ...... Upper presser foot 3 ... Pressing bases 5a, 5b ... Sensor group 6...・・・・Needle L ・−・・・・ Material to be sewn (label, etc.) S ・
・・・・・・・・・ Sensor W ・・・・・・・・・ Applicant for work cloth utility model registration Tokyo Heavy Equipment Industry Co., Ltd. Drawings (no change in content) Engineering 4〒2 Fig. 2 (a) ) , (b) (c) Figure 3 Figure 4 Figure 5 (a) (b) (c) Spontaneous procedure amendment December 5, 1980 Patent application dated November 30, 1980 (08) 2 Name of the invention Copying control sewing machine 4 Date of correction order Showa year, month, day (spontaneous) 5 Subject of correction

Claims (1)

[Claims] In the process of sewing an object to be sewn onto a workpiece, a plurality of sensors are used to detect the difference between the edge of the fabric or the stepped portion of the fabric outline of the object to be sewn, and the difference between the edges and the stepped portion of the fabric outline of the object to be sewn is detected by a combination of the detection categories of each sensor. , a copying control sewing machine characterized in that it is configured to control the feed drive direction of the workpiece.