JPS62284688A - X-y table driving apparatus of automatic 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 6. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an X-Y table drive device for an automatic sewing machine that performs pattern sewing within a certain section, for example.

[Conventional technology]

FIG. 2 is a perspective view showing an X-Y table drive device of a conventional sewing machine. In the figure, (1) is the sewing machine, (21 is the fBh motor that drives this sewing machine (1), (3) is a presser foot with a quadrilateral hole, and (4) is this presser foot (3) and the sewing machine ( 1) An air cylinder for sandwiching the cloth between the
(5) is a moving table that moves the presser foot (3)'r in the X-Y direction, and (6) is one of the power sources for this moving table (5), and the X - Pulse motor, (7) is the Y-pulse motor that determines the movement in the same direction of arrow (A), (8) is the needle position detector of the sewing machine, (9) is the 4D received from this needle position detector (8) number and memory element αO
A controller that controls the drive motor (2), X-pulse motor (6), and Y-pulse motor (7) according to the program, αη is directly connected to the X-pulse motor (6), (b) is directly connected to the Y-pulse motor (7) (timing pulse)
The driving pulley C15 is slidably fitted to the sliding shaft Qη,
A sliding table, CL*, (1
Reference numeral 6a) denotes a sliding base that slides on the sliding shafts (11, (18a)), is provided with a Y movement axis (1), and slides in the direction of arrow (A) in conjunction with the timing belt α.

Next, in this operation, matters related to the XY table will be explained. Now, the controller (9) and the υY-pulse motor (
7) starts rotating when a signal is received, and this torque is applied to drive boolean 17a'2J, timing belt α4, sliding table QQ,
The Y movement axis is converted into movement of the presser foot (3) via the movement table (5), that is, five members. Also the controller (9)
When a signal is input to the X-pulse motor (6), it starts rotating and this torque is applied to the drive pulley α℃ and the timing belt α.
1, sliding table α, X moving axis α, moving table (5), i.e. 5
The pressure is transmitted to the presser foot (3) through several members.

When you are concerned about the accuracy and speed of Goen-made, use X.

It is essential that the mass and deflection t of the I%&+(7) components from the Y-pulse motors (6) and (7) to the presser foot (3) be as small as possible. However, the configuration shown in Figure 2 has many problems when driving the X-Y table in a relatively small sewing machine, but as the movement range of the presser foot (3) increases, the mass of the component parts also increases, and the timing belt (To) Since 04 is a cantilever type, there was a problem with ``kinking''.

FIG. 3 is an explanatory diagram showing a conventional method for driving an X-Y table, which was developed to solve the above-mentioned problems.

In the figure, numerals 5 to 20 indicate the same or equivalent parts as those in FIG. The country is a coupling that leaves an error in the center line between the axis of the Y-pulse motor (7) and the axis of the drive boo +7 (12a), and transmits the power of the 6Ht drive pulley (12a) to the drive pulley (12b,). The timing belt 02 is the drive shaft X that transmits this power to the drive pulley α'4.

Y is an arrow indicating the moving direction of the presser foot (3) (not shown).

Next, this operation will be explained. Y-pulse motor (7
) is the torque of coupling (1), drive pulley (12a
), the timing belt 0 [transmitted to the drive pulley (12b) and the drive boob 1 (13) via the drive shaft 02, but when a load is applied to the presser foot (3) (not shown), each member causes deflection and impairs response accuracy.Especially when the timing belt is
1) This is largely due to the deflection of the long drive shaft.

This invention was made to solve the above problem, and it minimizes the load on the X-Y table drive motor, that is, the X, Y pulse motor (7), etc., and reduces the deflection of the drive shaft 0. The overall objective is to obtain an X-Y table drive device with a small decrease in rigidity due to

[Problem that the invention seeks to solve]

As mentioned above, in the conventional X-Y table drive device, the distance is large and the number and mass of the members on the instep of the power transmission mechanism are large, so it is sometimes difficult to perform accurate and high-speed sewing work. Ta.

[Means for solving problems]

In the X-Y table drive device for a sewing machine according to the present invention, in the X-Y tape drive device for an automatic sewing machine that moves the presser foot (3) according to a preset trajectory to obtain stitches, the presser foot (3) On both sides of the moving table (5) equipped with a timing belt α4 that fully drives this moving table (5)
A pulse motor (7) is installed between the drive shaft (B) of the drive pulley (6) that drives the timing belt A4.
(+- provided.

[Effect]

In this invention, the presser foot of the automatic sewing machine is
The drive pulleys at both ends are driven by a pulse motor installed between the six drive drives. The two-strip timing belt engaged with this drive pulley is provided with X and Y moving axes via two sliding stands, and a work presser interlocks with the moving stand that is slidably fitted to the X and Y moving axes. tl k is program-controlled precisely and at high speed.

〔Example〕

FIG. 1 is an explanatory diagram showing one embodiment of the present invention. In the figure (5-30), o2. (Y) indicates the same or equivalent portion as the conventional one. However, Y-pulse motor (7
) and the coupling (7) are located in the middle of the drive shaft (the same applies to the X-pulse motor, but their description is omitted).

Next, this operation and function will be explained. Presser foot (3) (
A timing belt α1°, α41c, and two timing belts α41c are installed parallel to each other on both sides of the X-Y table movable stage (5) on which an X-Y table (not shown) is placed. A pulse motor (7) and two couplings ζ and 2 are installed in series in the middle of the drive shaft 0 provided at o2, and the number of parts is reduced compared to the conventional example. Therefore, the performance of the drive shaft 02 is improved, the response is good, and the timing belt α4. Since α and 9 move simultaneously, the forces applied to this device are balanced and do not cause strain. In other words, unlike the case where the timing belt α4T is installed on one side, it will not be “twisted”.
No excessive load is applied to either the Y-pulse motor (7) or the X-pulse motor (7) (not shown). Therefore, there is less bending, so presser foot (3
) (see Figure 2).

Further, in this embodiment, the couplings (1), (1) are provided on both sides of the Y-pulse motor (7), but for example, the rotation shaft of the Y-pulse motor (7) may be integrated and extended.
By providing motion pulleys) and (6) on both ends of this rotating shaft, not only will the coupling (2) become unnecessary, but it will also prevent the "backlash" caused by the coupling (1), (2) and further reduce the number of parts. effective.

〔Effect of the invention〕

This invention improves the responsiveness and rigidity of the device by reducing the distance between the pulse motor that moves the presser foot in the t-X-Y direction and the drive boob and eliminating the timing belt in between. has improved, and there is no longer any ``tiffiness''.
In addition to being able to perform sewing operations with high precision, the reduction in the number of parts has a positive effect on manufacturing costs and maintenance.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, FIG. 2 is a perspective view of a conventional X-Y table driving device, and FIG. 3 is an explanatory diagram of a conventional driving device. In the figure, (5) is a moving table, (7) is a Y-pulse motor, (2) is a drive pulley, α is a timing belt, and Q is a
・ is the sliding base, α fathom is the sliding shaft, (1) is the Y movement axis, inside is the coupling, <32 is the drive shaft, flash is the arrow, and (g) is the arrow. In each figure, are the same symbols the same or equivalent parts? Show O Agent Patent Attorney Masaru Sato 71 years old! 18; J 7th place 10th figure 3 Y Hagi P

Claims (1)

[Claims] In the X-Y table drive device of an automatic sewing machine that moves the presser foot (3) according to a preset trajectory to create stitches, on both sides of the movable table (5) equipped with the presser foot (3),
A timing belt (14) that drives this moving table (5)
An X-Y automatic sewing machine characterized in that a pulse motor (7) is provided in the middle of a drive shaft (32) of a drive pulley (12) that drives the timing belt (14).
Table drive.