JPS6080481A - Sewing method and apparatus of quilting 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 The present invention relates to a quilting machine, a sewing method and apparatus for a quilting machine controlled by a Tokuni NC.

Conventionally, NC-controlled quilting machines have a Y-axis (vertical direction) fabric frame 4' superimposed on an X-axis (horizontal direction) fabric frame 1' as shown in Fig. 1, and these lx-axis servo motors (
-1, pulse motor) 2', Y-axis servo motor (or pulse motor) 6', Y-axis cloth frame 4
' is given motion in the X and Y axes. Y-axis cloth frame 4'
The feed roller 7' and the tension row 211' are each rotatably supported, and the fabric W' is held in the Y-axis fabric frame 4' with the fabric W' sandwiched between them, so that the fabric W' are moved inward in the X and Y axes from the needle positions 12', 12', etc., which are fixed points. By controlling this movement by the NC device 13', a predetermined pattern is sewn, and the NC device 13' controls two servo motors (or pulse motors) 8' to drive the feed roller 7', thereby sewing the fabric. W' is wound up (Z-axis direction)
Therefore, a predetermined pattern is sewn continuously. In addition,
3' and 5' are screw shafts, 9' is a universal joint, and 10' is a joint made of a spline or the like.

However, in order to continuously sew a pattern onto the fabric W' with the conventional quilting machine configured as described above, it is necessary to The three axes must be controlled by the NC device 13', which is expensive. Yes, there is a limit to the amount of movement of the Y-axis cloth frame 4' due to the mechanism.
It was completely impossible to sew a vertically long pattern, such as the one shown in FIG. 2, for example. In the figure, a indicates the Y-axis movement limit, and b indicates the X-axis movement limit. The arrow indicates the direction in which the fabric is wound. Furthermore, since the cloth frame has a double structure in which the X-axis cloth frame 1' and the Y-axis cloth frame 4' are overlapped, the drive transmission mechanism for these becomes complicated and at the same time, the structure becomes thicker. . Since the fabric frame of a quilting machine is moved in both the X and Y axes, it is desirable that these movable parts be as light as possible.

By the way, in a quilting machine, the Y-axis and the Z-axis are both vertical in terms of the sewing part of the fabric, and if the Z-axis can be controlled to be driven in the opposite direction, the Y-axis can be omitted.

This invention was conceived in view of the above points, and is a quilting machine that uses two-axis control of the fabric (X, Z, and Z axes), has no restrictions on long patterns in the vertical direction, and has a lightweight fabric frame that enables high-speed sewing. The object of the present invention is to provide a sewing method and a device for sewing.

According to this invention, the fabric frame has a single structure that can move only in the X-axis direction, and the fabric can be arbitrarily moved in the vertical direction while rotating the feed roller in the forward and reverse directions. The tension roller in this position pulls back the fabric to prevent the fabric from sagging during sewing.

The present invention will be described below with reference to the embodiments shown in FIGS. 3 to 5.

In the drawing, la and la are a pair of bars, and this bar ia
, 1a are provided with bearing blocks 2, on which three feed rollers 3.4.5 are rotatably and reversibly supported.

In front of the machete and bars 1'a and 1a, there is a feed roller 3.
A tension row 26.7 is rotatably supported opposite to the tension row 4.5. In this way, a pair of bars 1a,
la is maintained at the interval by the feed roller 3.4.5 and the tension roller 6.7, and the cloth frame 1 is constructed (
(See Figures 3 and 5).

Although the cloth frame 1 is not shown, it is placed on the main body of the quilting machine so that it can be rotated in the X-axis direction (1) and the q-direction.

8 is the X 1lDh servo motor, its screw 1iil1
9 is screwed into one of the bars 1a.

In this way, the cloth frame 1 is moved to a predetermined 5i according to a command from the NC device 19 via the X-axis servo motor 8 and the screw shaft 9.
It is adapted to be moved in the X-axis direction.

Among the three feed rollers 3.4.5, the lower feed roller 5 is connected to a two-axis servo motor 11 via a joint 10.
are combined. The joint 10 is composed of a spline or the like, so that even if the cloth frame 1 moves in the X direction, the rotation of the two-axis servo motor 11 is transmitted to the feed roller 5. Although not shown, the rotation of the feed rollers 5 is also transmitted to the respective feed rollers 4.3 via a gear mechanism or the like.

The tension roller 6 is electrically connected via a clutch 12. This clutch t is a gap type clutch,
For example, in a well-known powder clutch, magnetic powder is interposed between the input shaft and the output shaft, and by magnetizing the powder, the magnetic powder is connected in a chain and torque is transmitted between the input and output shafts. By appropriately controlling the excitation current, the transmitted torque can be set steplessly. This clutch 12
The input shaft of is connected to the electric motor 13, and the output shaft is connected to the tension roller 6.
By coupling the cloth to the "back 61", it becomes possible to move the cloth in the Y-axis direction, which is a feature of the present invention. The tension roller 7 is arranged so as to press against the tension opening/roller 6 with an appropriate pressing force.

Feed roller 3.4.5 made as above <414
The fabric W1 and the cotton fabric W2 are held in the fabric frame 1 by sandwiching the fabrics ~1 and the pure fabric difference between the tension rollers 6.7 and 6.7 as shown in FIG. 14 is a guide,
It is fixed to a cloth frame 1, where the cloth Wl and the cotton cloth W2 are overlapped.

Reference numeral 15 denotes a drive section for vertically moving the needle 16, and 17 denotes a bobbin thread drive groove equipped with a shuttlecock, etc., and these constitute the sewing mechanism.

The fabric W1 and cotton fabric W2 held in the fabric frame 1 are rotated in the Z-axis direction (
Arrow Y! , Y2 (corresponding to the conventional X-axis direction). Further, the rotational force of the electric motor 13 is constantly transmitted to the tension roller 6 via the clutch 12, and the direction of this rotational force is always in the direction of the cloth w1 as indicated by the arrow Y2.

Therefore, even when the feed roller 3.4.5 rotates normally and winds up the fabric in the Y direction, it continues to rotate and feeds the fabric in the Y2 direction by the tension roller 6.7. However, as mentioned above, clutch 1
The transmission torque in step 2 can be set steplessly, so by setting the torque at this time to a small value,
The fabric material overcomes this torque and moves in the Y1 direction while rotating the tension rod 26.7 in the opposite direction to the direction of rotation by the electric motor 13. That is, the clutch 12 will slip between its input shaft and output shaft. Note that at this time, a tension determined by the exciting current of the clutch 12 is applied to the fabric W and the like.

Next, the feed rollers 3.4.5 are reversed and the fabric station etc.
When rewinding in the direction, the rotational force of the electric motor 13 is directly transmitted to the fabric via the clutch 12 and the tension roller 6.7, so the fabric immediately moves in the Y2 direction without sagging on the fabric frame 1. be done. At this time, the excitation current is controlled so that the transmitted torque is set relatively large so that no slip occurs in the clutch 12.

Note that the excitation current for the clutch 12 can be set steplessly by a control device (not shown), and the excitation current for the clutch 12 can be set steplessly in the Y1 direction and the Yz direction movement in synchronization with this. It is now subject to change.

In this way, the cloth wl, etc. held in the cloth frame 1 is moved at the same time by the cloth frame 1 being moved in the X-axis direction with respect to the position of the needle 16, which is a fixed point, and the cloth wl, etc. are simultaneously moved, and the feed roller 3. 4.5 rotates forward and backward, causing the fabric object to hyper-move in the Z-axis (y, Y2) direction. By controlling the amount of movement of these X glaze and Z body d by the N'C device 19, the pattern of ``C'' can be sewn continuously σL. Ma/ζ, the vertically long pattern as shown in Fig. 2 also has a feed roller 3.4 in the Z-axis direction (Y+XYz).
5 and the tension roller 6. Because of the direction of rotation of the tension roller 6.7, there is no 1jlJ limit on these rotating surfaces, and all vertically long lords can be sewn.
ii It is possible.

As mentioned above, this 5j'lil is a single unit in which the iF frame 1 is composed only of a pair of bars 1a, 1a, the feed roller 3.4.5 that maintains the interval between the bars 1a, 1a, and the tension roller 26.7. The frame is tilted, and this cloth frame 1
Since the chisel only moves in the X-axis direction, the drive mechanism is simple and extremely light in weight, and there is little vibration of the fabric frame 1, making high-speed sewing possible. The cloth movement is caused by the X-axis movement of the cloth frame 1 and the Z +tib given to the cloth itself.
Various patterns can be sewn using two axes of motion, so
The NC device 19 that controls this may also be a two-axis control NC device, making it extremely inexpensive.

Furthermore, according to this invention, since there is no controllability in the Z-axis movement, vertically long patterns, which were conventionally considered impossible, can be produced without any problem, which is extremely beneficial.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the movement of the cloth frame of a ruting machine using conventional NC control, and Fig. 21/1 is an example of a pattern sewn on cloth 111. FIG. 3 is a perspective view showing the relationship between the cloth frames of the quilting machine of the present invention. FIG. 4 is a side view schematically showing the main parts of Akira Motoya's quilting machine. Figure 'A'fJ5 is a plan view schematically showing the quilting machine of the present inventor. In the figure 1...... Cloth frame 3.4.5
・・・・・・Feed roller 6.7・・・・・・・・・
・・・Ji Corolla 8・・・・・・・・・・・・・・・・・・
・X 'i'ltl servo motor 11...
......Z-key servo motor 12...
・・・・・・・・・・・・・・・Clutch 13・・・・・・
・・・・・・・・・・・・'5th shift (16th shift...)
・・・・・・・・・・・・・・・= −)”/l/19・・
・・・・・・・・・・・・・・・NC device patent applicant Tsugami Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) Sewing is performed by moving the cloth frame in the horizontal direction based on a predetermined program, rotating the feed roller in the forward and reverse directions, and moving the cloth in the vertical direction 8 times while driving the tension roller. A sewing method using a quilting machine. (2) A first driving means that works on Al1 in the horizontal direction of the cloth frame, a feed row 2 that feeds the cloth 9, a second driving means that rotates the feed roller forward and reverse, and a feed roller. A sewing device for a quilting machine, comprising tension rollers mounted opposite to each other and third driving means for driving the tension rollers.