JPS6272391A - 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 (Field of Industrial Application) The present invention relates to a sewing machine capable of sewing sewing elements such as letters and patterns.

(Prior art and problems to be solved by the invention) Conventionally,
As a sewing machine that can sew sewing elements such as letters and patterns,
The work cloth is removably held in a state where the sewing area is divided by the holding device, and the holding device is moved to feed the work cloth, and the seam forming device is operated to perform the sewing on the work cloth. It is known that the elements are sewn together.

However, in this conventional sewing machine, the movement range of the clamping device cannot be automatically changed according to the size and shape of the clamping device, and each time the clamping device is replaced, the movement range of the clamping device cannot be changed automatically.
It was necessary to set the movement range of the clamping device by external operation, which was troublesome.

(Object of the invention) This invention was made in view of the above circumstances, and
The purpose is to provide a sewing machine in which the movement range of the clamping device can be automatically set according to the size and shape of the clamping device when the clamping device is attached.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a needle that passes through a work cloth support surface and moves up and down, and sews on the work cloth on the work cloth support surface. A seam forming device that forms stitches, a clamping device that removably clamps the work cloth while dividing the sewing area, and a clamping device that removably supports the clamping device and moves the clamping device to remove the workpiece cloth. a feeding device that applies feed to the feed device; a detector that is provided between the clamping device and the feeding device and outputs an identification signal according to the type of clamping device installed; The sewing machine includes a setting means for setting a movement range of the clamping device, and a control means for controlling the operation of the stitch forming device and the feeding device within the movement range set by the setting means.

(Operation) Therefore, when the clamping device is attached to the feeding device, an identification signal corresponding to the type thereof is outputted from the detector, and the setting means sets the movement range of the clamping device based on the signal. The control means controls the operation of the stitch forming device and the feeding device within its movement range.

(Example) An example embodying the present invention will be described below with reference to the drawings. As shown in FIG. 2, a sewing machine main body 2 consisting of a bed section 2a and an arm section 2b is placed on a sewing machine table 1, and the upper surface of the bed section 2a and the sewing machine table 1 are placed on a sewing machine table 1.
A work cloth support surface 3 is constituted by the upper surface of. A needle plate 4 is mounted on the bed portion 2a, and a needle hole 4a is formed approximately in the center thereof. Further, a sewing machine motor 5 for rotationally driving a sewing machine main shaft (not shown) is mounted on the right side of the arm section 2b, and a needle bar 6 having a needle 6a at the lower end is mounted on the left side of the arm section 3. It is supported so that it can move up and down, and is moved up and down through the needle hole 4a as the main shaft of the sewing machine rotates.

A yarn loop catcher (not shown) that cooperates with the needle 6a to form a stitch in the work cloth W on the work cloth support surface 2 is built into the arm portion 2b so as to face the needle 6a. The thread loop catcher and needle 63 constitute a stitch forming device.

A pair of left and right mounting frames 10 and 11 are fixed at a predetermined interval on the rear side of the upper surface of the sewing machine table l. A feed screw 12 and a rotation transmission shaft 13 are rotatably supported between the frames 10 and 11, respectively. For the left side installation, a first pulse motor 14 for rotationally driving the feed screw 12 is attached to the frame 10, and for the right side installation, a second pulse motor 14 for rotationally driving the rotation transmission shaft 13 is attached to the frame 11. A pulse motor 15 is attached.

An X-axis column moving base 16 is supported on the feed screw 12 so as to be movable in the axial direction thereof, and the X-axis column moving base 16 has a guide vibe 16a extending in a direction orthogonal to the feed screw 12 and the rotation transmission shaft 13. It is equipped with The guide vibration 16a of the X-axis moving table 16 is connected to the Y-axis column moving table 17.
is fitted and supported so as to be movable along the axis. Also,
Both ends of a pair of connecting wires 18 which are disposed around the left and right sides of the X-axis moving table 16 and linked to the rotation transmission shaft 13 are fixed to the Y-axis column moving table 17, and the clamping frame 19 is fixed to the Y-axis column moving table 17. A detector 17a for identification is installed inside.

The clamping frame 19 as a clamping device that removably clamps the work cloth W has a mounting part 19a equipped with a mark M that outputs a signal according to its size and shape, and a hollow ring-shaped work cloth holding part 19b. and an inner frame 19c that is fitted into the work cloth holding portion 19b and cooperates with the work cloth holding portion 19b to hold the work cloth W therebetween. The mark M in this embodiment
is constituted by a magnet, and the clamping frame 19 is attached in part 1.
At 9a, the Y-axis moving table 1 is fixed by the mounting screw 17b.
7, the signal output from the mark M is detected by the detector 17a, thereby identifying the clamping frame 19, and outputting an identification signal.

The clamping frame 19 is connected to the latch of the first pulse motor 14.
Based on the r+1 rotation drive, the feed screw 12 and the X-axis moving table 1
The rotation transmission shaft 13.6 is moved in the left-right direction (X direction) via the rotation transmission shaft 13.
It is moved in the front-back direction (Y direction) via the connecting wire 18, the Y-axis moving table 17, etc.

In addition, each of the above-mentioned installations is carried out using frames 10.11. Feed screw 12° rotation transmission shaft 13. X-axis moving table 16. A feeding device WF is constituted by the Y-axis moving table 17, the connecting wire 18, each pulse motor 14, 15, etc.

A tablet board 20 and an input pen 21 are disposed on the top surface of the right side of the sewing machine table l, and a CRT
A display device 22 consisting of a display is provided.

A sewing element array section 23 is provided on the tablet board 201-.
is provided, and the array section 234 is used to sew various characters and patterns! If! 11 elements are displayed in layout 11, divided into elements.

The sewing element arrangement section 2 on the tablet board F20
A sewing position input canister 24 for manually specifying the sewing position of each sewing element is provided on the right side of the sewing machine 3.

Next, the electrical configuration of the sewing machine in this embodiment will be explained. 25 shown in FIG. 1 is a central processing unit (CPtJ) constituting a setting means and a control means, and the CP LJ
A random access memory (RAM) 26 and a read only memory (ROM) 27 are connected to the memory 25. The ROM 27 includes a data registration program for creating sewing element data by combining various nine sewing elements, a data registration program for storing the data, and a data registration program for sewing based on the stored data. Various control programs such as sewing programs are stored. Further, the sewing element array section 23 on the tablet board 20. Sewing position entry canister 24, input pen 21. The clamping frame detectors 17a are each connected to the CPU 25 via an input/output interface 28.

Furthermore, the CPU 25 has a human output interface 2.
A floppy disk drive device 29 is connected via 8, and a floppy disk 30 is removably attached to the floppy disk drive device 29. This floppy disk 30 stores sewing data corresponding to coat data of various sewing elements including various kanji, hiragana, katakana, alpha characters, numbers, patterns, etc.

Then, the tablet board F2 is inputted using the input pen 21.
When a predetermined function key (not shown) on 0 is pressed manually, the CPU 25 reads the data compilation program from the ROM 27 and sets the corresponding mode. In that state, use the input pen 21 to sew! ! ! ! When a material is selected and code data corresponding to the sewing element is input, the CP tJ 25 reads the sewing data corresponding to the sewing element from the floppy disk 30, and sends the sewing 9-JE to the input/output interface 28. The information is displayed on the display device 22 via the computer, and is also temporarily stored in the RAM 26. In addition, as the clamping frame 19 is attached, a predetermined identification signal is emitted from the detector 17a in the Y-axis moving table 17.
I) When tJ 25 is input manually, C based on the signal
The PU 25 sets the movement range of the clamping frame 19, stores the sewing element specifyable area corresponding to the movement range in the RAM 26, and displays it on the display device 22. Further, when the sewing position of each sewing element is designated and input using the input pen 21 on the sewing position entry canister 24 on the tablet board 20, the CPU 25 determines whether the sewing position is located within the sewing element designable area. Depending on the result, the sewing position is displayed on the display device 22 and stored in the RAM 26, or a predetermined message is displayed on the display device 22.

In the vicinity of the sewing machine motor 5, a detection device 32 is mounted on the arm portion 2b for detecting the counting position corresponding to the top dead center of the needle 6a and the needle down position corresponding to the bottom dead center of the needle 6a. A detection signal outputted from 32 is inputted to CPU 25 via the input/output interface 28.

Then, when a start key (not shown) on the tablet notebook board 20 is specified and input with the sewing mode based on the sewing program set by the CPU 25, the C
PU25 is RAM26 or floppy disk 30
Based on the sewing data stored and set, a drive signal is output to the sewing machine motor 5 via the input/output interface 28 and the sewing machine motor drive circuit 31. Further, based on the detection signal from the detection device 32 and the movement range data of the clamping frame 19 stored and set in the RAM 26, the CP
U25 is an input/output interface 28 and a drive circuit 33
A drive signal is output to the pair of pulse motors 14 and 15 of the feeding device F through the .

Therefore, based on the above-mentioned signals, the main shaft of the sewing machine is rotationally driven by the sewing machine motor 5, the stitch forming device is operated, and the feed device F is moved with the needle 6a being pulled upward from the workpiece cloth W. Then, feed is applied to the work cloth W, and the sewing element is reliably sewn within the sewing area formed by the clamping frame 19.

As described above, in this embodiment, as the clamping frame 19 is mounted, a predetermined identification signal is sent from the detector 17a in the Y-axis moving table 17 to the CPU 2 in accordance with the mark M on the clamping frame 19.
5, the CPU 25 automatically sets the movement range of the clamping frame 19 based on the signal, and stores in the RAM 26 the area in which sewing elements can be specified corresponding to the movement range. When various types of clamping frames 19 having different shapes are used interchangeably, there is no need for the operator to reset the movement range each time the clamping frame 19 is replaced, thereby improving the work efficiency of the entire sewing work.

(Effects of the Invention) As described in detail above, the present invention can automatically set the movement range of the clamping device according to the size and shape of the clamping device when the clamping device is attached, and the entire sewing work can be This has the excellent effect of contributing to improving work efficiency.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the electrical configuration of a sewing machine embodying the present invention, and FIG. 2 is a perspective view showing the entire sewing machine. In the figure, 3 is a work cloth support surface, 6a is a needle, 17a is a detector, 19 is a clamping frame, 25 is a CPU constituting a setting means and a control means, F is a feeding device, and W is a work cloth.

Claims (1)

[Claims] 1. A needle (6) that passes through the work cloth support surface (3) and moves up and down.
a) and on its work fabric support surface (3) (W);
a seam forming device that forms a seam in the seam, a clamping device (19) that removably clamps the work cloth (W) in a state where the sewing area is divided, and a clamping device (19) that removably supports the clamping device (19). , a feeding device (F) that moves the clamping device (19) to feed the work cloth (W), and a feeding device (F) that is installed and provided between the clamping device (19) and the feeding device (F). a detector (17a) that outputs an identification signal according to the type of the clamping device (19);
) a setting means (25) for setting the movement range of the clamping device (19) based on a signal from the stitch forming device and the feeding device (F) within the movement range set by the setting means (25); ) Control means (25) for controlling the operation of the sewing machine.