JPS6315984A - Electronic locking 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) This invention relates to a sewing machine that forms stitches, a drive device that drives the sewing machine, a presser device that clamps a workpiece, and a presser device that uses preprogrammed data. an automatic sewing machine equipped with a drive device for positioning and a control device for controlling these;
In particular, it relates to the drive structure of the electronic bar tacking.

(Prior Art) FIG. 4 is a block diagram showing the configuration of a conventional electronic bartack sewing machine. In the figure, 1 is a P-ROM in which multiple stitch patterns are stored, 2 is a group of operation switches, and 3 is a CPtJ.
Then, predetermined calculations are performed based on inputs from the P-ROMI and the operation switch group 2. 4 is a solenoid drive device, 5
is a sewing machine, 6 is a motor control device, 7 is a sewing machine drive motor, 8 is an X-axis drive device, 9 is a Y glaze driving device, 18 is an X-axis pulse motor, 19 is a Y! 1+li] pulse motor, and 20 is an XY table.

The conventional electronic bar tacking sewing machine is configured as described above, and the P-
The CPU 3 is operated by human power based on the contents of the ROMI and the operation of the operation switch group 2, and the solenoid drive device 4 and the motor control device are respectively controlled based on the calculation results of the CPU 3, and the sewing machine 5 and the sewing machine drive motor 7 are drive-controlled. Ru. Furthermore, the X-axis drive device 8 and the Y-axis drive device 9 are similarly controlled, and the X-axis pulse motor and Y-axis pulse motor are drive-controlled to control the position of the XY table 20.
The desired seam is obtained.

FIG. 5 is a three-dimensional diagram showing the configuration of the vicinity of the X-glaze motor 18 and Y-axis pulse motor 19 that drive the XY table 20. In the figure, 23 is a coupling, 24 is a timing gear belt, 25 is a transmission shaft, 26 is a bearing, 27 is a presser foot, 28 is a presser foot lower plate, 29 is a presser foot, 30 is a coupling, 31 is a timing gear belt, 32 is X@
33 is an X-axis fixed rail, 34 is a Y-axis fixed rail, and 35 is a Y-axis moving rail.

In FIG. 5, the X@pulse motor 18 moves the XY table 20, ie, the timing gear belt 31, along the X axis. On the other hand, the Y-axis pulse motor 19 moves the XY table 20 in the positive and negative directions of the Y-axis while repeating forward and reverse rotations.

As a result, the cloth (not shown) held down by the presser foot 29 is sewn in the X direction and the Y direction, and so-called electronic closing is performed.

[Problems to be solved by the invention] In the conventional electronic closing sewing machine as described above, the XY table 20 is operated by two independent pulse motors 18 and 19.
It is configured to work in each direction of the axis and the Y axis.

For this reason, especially when sewing zigzag sections, the Y@pulse motor 19 must be rotated alternately in forward and reverse directions, which increases the load on the pulse motor, and when sewing at high speeds, the motor is likely to lose synchronization, resulting in correct stitching. There was a problem that it was not formed.

The present invention has been made to solve these problems, and an object of the present invention is to provide an electronic closing sewing machine in which the motor does not step out during high-speed sewing and the correct stitches are formed.

(Means for Solving the Problems) The electronic closing sewing machine according to the present invention has two driving means each driving in two orthogonal directions as a driving device for positioning a presser foot device, one of which is a driving device for positioning a presser foot device. includes a stepping motor driven to rotate in forward and reverse directions, and the other drive means includes a stepping motor and a link mechanism driven by the stepping motor to cause reciprocating motion.

[Effect]

In this invention, when sewing a zigzag section, one stepping motor moves the presser foot device in one direction, and the other stepping motor reciprocates the presser foot device in a direction perpendicular to the aforementioned direction via a link mechanism. let

(Embodiment) FIG. 1 is a diagram showing an embodiment of the present invention, in which numerals 1 to 9 and 18 to 20 are completely the same as the conventional device described above.

40 is a YITo reciprocating mechanism, and 41 is a position detection sensor. FIG. 2 is a perspective view of the Y-axis reciprocating mechanism 40 and the position detection sensor 41.

In the figure, 42 is a coupling, 43 is a position detection disk, and a slit 43a is provided therein.

44 is a sensor. The position detection disk 43 and the sensor 44 constitute a position detection sensor 41. 4
5 is link A, 46 is a stepped shaft, and 47 is stepped across link A! This is a nut that engages with Ti1I146. 48
is link B. 49 is a bottle. Reference numeral 50 denotes a drive shaft, which is engaged with the link 848 through a pin 49. The above member from link A to link B is the Y-axis reciprocating mechanism 4
It constitutes 0. The length of the inside of the ellipse of the link A45 corresponds to the amplitude, and the drive shaft 50 reciprocates in accordance with the bartacking width.

In the electronic closing sewing machine configured as described above, the needle bar 51 moves up and down on the needle plate surface 52 as shown in FIG. 3(A). Sewing machine detector (not shown, but installed in the head)
The lower position signal sends out a pulse signal as shown in FIG. 3(B), while the pulse signal for driving the Y glaze pulse motor 19 is given as shown in FIG. 2(C). At this time, the rotational drive of the Y-axis pulse motor 19 is converted into reciprocating motion by the link A45 and link B48, and the drive! 1i
+h 50 makes a reciprocating motion as shown in the same figure (D), and
The movement of the table 20 is controlled so that it vibrates in the Y-axis direction. The position detection sensor 41 detects the throat plate surface 52, and sewing is performed using the needle bar 51 at the timing indicated by the broken line in the figure.

Of course, at this time, the X-axis pulse motor 18 rotates in one direction and moves the XY table 20 eight times in the X direction at a constant speed. The XY table 20 is controlled in this manner to perform sewing of the zigzag portion.

In the above embodiment, a mechanism as shown in FIG. 2 is shown as the Y@reciprocating mechanism 40, but the present invention is not limited to this, and other mechanisms may be used as long as they have similar functions. Needless to say, it's okay to be lazy.

(Effects of the Invention) As described above, according to the present invention, since a link mechanism is added to one of the driving means, reciprocating motion can be obtained even if the motor rotates in only one direction, and therefore the load on the motor is light. Even during reciprocating operation, accidents such as stepping motor failure do not occur, and correct seams are formed. Therefore, high-speed sewing is possible.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an electronic bartack sewing machine showing an embodiment of the present invention, Fig. 2 is a perspective view showing the Y-axis reciprocating mechanism shown in Fig. 1, and Fig. 3 shows the operation of the device shown in Fig. 1. Time chart, Figure 4 is a block diagram of a conventional electronic bartack sewing machine, Figure 5
The figure shows the X-axis pulse motor in Figure 4, and the Y! It is a perspective view showing an id+ pulse motor and an XY table three-dimensionally. In the figure, 40 is a Y-axis reciprocating mechanism, and 41 is a price detection sensor. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] A sewing machine that forms stitches, a drive device that drives the sewing machine, a presser device that clamps a workpiece, a drive device that positions the presser device based on preprogrammed data, and a device that controls these. In an electronic bar tack sewing machine equipped with a control device, the drive device that positions the presser foot device consists of two drive means that are independently driven in two orthogonal directions, and one of the drive means has a forward and reverse rotation drive. 1. An electronic bar tacking sewing machine, characterized in that the other driving means includes a stepping motor driven to rotate in one direction, and a link mechanism driven by the stepping motor to reciprocate.