JPH06102113B2 - sewing machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine, and more particularly to a sewing machine having a pattern data input mode and a sewing mode.

[Conventional technology]

Conventionally, when the pattern (shape and hand movement) is stored in the sewing machine, the sewing machine is continuously rotated in one direction and the needle bar is moved up and down.

[Problems to be Solved by the Invention]

Therefore, in such a conventional sewing machine, since the sewing machine makes one rotation or more, there is a drawback that a hole for a needle is inevitably formed in the pattern original drawing or the sample sewing product.

The present invention eliminates such drawbacks.

[Means for Solving the Problems]

The present invention is a sewing machine that moves a needle provided at a lower end of a needle bar up and down between an upper position and a lower position while relatively horizontally moving positions of the needle and a sewing product to form a stitch, A motor that drives the needle bar up and down and is capable of forward and reverse rotation, needle position detection means that can detect the needle position, setting means that can set the needle lowering position of the needle, memory, and a downward command. Control means for rotating the motor in the normal direction to lower it to the needle lowering position set by the setting means, and rotating the motor in reverse by an ascending command to raise the needle to the upper position, and the relative position of the needle and the sewn product in the memory. And an input means for storing the data in the memory.

[Action]

According to the sewing machine of the present invention, after the needle bar descends right above the pattern original drawing or the sample sewn product, the needle bar can be directly raised from this position without making a hole in the pattern original drawing or the sample sewn product with a needle.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIG. 1, a forward / reverse servomotor is used as a sewing machine motor 1 that moves a needle bar up and down by connecting to a main shaft of a sewing machine having a pattern data input mode and a sewing mode, and a pattern (shape and shape) is used. To store the (hand movement) in the sewing machine, rotate the sewing machine motor 1 forward to lower the needle to a position just above the cloth, and confirm that the needle position matches the needle position of the pattern correctly. After storing the data, the sewing machine motor 1 can be reversed from that position to ascend to the upper stop position.

In addition, 2 is an X / Y motor for cloth movement, 3 is a mode selector switch, 4 is a needle lowering position setting switch, 5 is a data memory input switch, 6 is a pedal switch, 7 is a needle position detector, and 8 is a JOG switch. , 9 is sewing data memory RAM, 10 is
ROM and 11 are CPUs.

Since the sewing machine of the present invention is as described above,
When storing the memory, for example, as shown in FIG.
Mode switch 3 by pressing the mode changeover switch 3
Then, the needle position detector 7 moves the needle bar position to the upper stop position.
Check if the JOG switch is in the upper stop position.
Sew 8 to drive the cloth moving X / Y motor 2
Control the X and Y positions to make the needle bar a pattern original drawing or sample
The position is assumed to be the upper part of the first needle position of the sewn product, and then
Press pedal switch 6 with to rotate sewing machine motor 1
The first needle of the pattern original drawing or sample sewn down the rod
Needle down position just above the position (the needle down position setting switch 4
Let it stand still at a preset height), and at this point
Check whether the needle bar position is correctly aligned with the first needle position.
Confirm visually. The needle bar is correctly aligned with the first position
If not, immediately press pedal switch 6 and
Repeat the same operation to correct the position, and if they match
In this case, the first needle position is set to the pattern data memory input switch.
After pressing switch 5 to store in memory, pedal switch
Press 6 to reverse the sewing machine motor 1 and move the needle bar to the desired height.
Raise it to the upper stop position.

If they do not match, the same operation is repeated for the first needle position of the pattern original drawing or sample sewing product, and if they match, the same operation is performed for the pattern original drawing or second needle position of the sample sewing product. To do.

The needle lowering position of the needle bar is arbitrarily set in advance in accordance with the pattern original drawing or the thickness or unevenness of the sample sewn product, and if it is not confirmed that the needle bar is in the upper stop position, The JOG switch 8 and the pedal switch 6 for driving the needle lowering drive can be set so as not to be activated.

〔The invention's effect〕

According to the sewing machine of the present invention, after confirming the needle position of the needle bar with respect to the pattern original drawing or the sample sewn product, the needle bar can be raised from that position without continuously descending. There is a great advantage that the pattern can be promptly and surely input to the memory without being damaged or damaged.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining a sewing machine of the present invention, and FIG. 2 is a flow chart showing its operation. 1 ... Sewing machine motor, 2 ... X / Y motor for cloth movement, 3
...... Mode selector switch, 4 ... Needle down position setting switch, 5 ... Data memory input switch, 6 ... Pedal switch, 7 ... Needle position detector, 8 ... JOG switch,
9 ... Sewing data memory RAM, 10 ... ROM, 11 ... CPU.

Claims (1)

[Claims] 1. A sewing machine for forming a stitch by moving a needle provided at a lower end of a needle bar up and down between an upper position and a lower position to relatively horizontally move a position of the needle and a sewn product. , A motor for driving the needle bar up and down and capable of forward and reverse rotation, a needle position detecting means for detecting the needle position, a setting means for setting the needle lowering position of the needle, a memory, and a descending command Control means for rotating the motor in the forward direction to lower it to the needle lowering position set by the setting means, and rotating the motor in reverse by an ascending command to raise the needle to the upper position, and the relative position between the needle and the sewn product. A sewing machine comprising: an input means for storing in a memory.