KR20010050396A - Multi-head type sewing machine - Google Patents

Abstract

PURPOSE: To provide a sewing machine for simultaneously sewing a lot of thick cloths efficiently. CONSTITUTION: This multihead sewing machine is provided with a plurality of sewing machine units 11. In the sewing machine unit 11, lock-stitching is carried out by cooperation between a needle bar 5 supported in a sewing machine arm 3 arranged above sewing machine table 1 and an oscillation type loop catching apparatus 10 supported in a hook supporting body 7 arranged below the sewing machine table 1. The multihead sewing machine is also provided with a sewn cloth holding body 30 driven on the coordinate plane in both of the X and Y directions above the sewing machine table 1.

Description

Multi-head type sewing machine

The present invention relates to a multi-head sewing machine composed of a plurality of sewing units having a semi-rotating book as a rocking loop catcher.

In a multi-head sewing machine having a plurality of sewing machine units, a main rod type that employs an all-rotating book is generally used as a means for capturing the lower thread. However, for example, when sewing a thick to-be-sealed material such as a seat cover of an automobile, a sewing machine employing a semi-rotating book is often used as the lower thread capturing means.

However, the existing sewing machine employing a semi-rotating book as a swing-type loop catcher exists only in so-called single head sewing machines equipped with only one sewing unit. For this reason, the same sewing cannot be performed simultaneously with respect to several to-be-sealed objects, and there existed a problem that sewing efficiency was low.

The present invention has been proposed in view of the above-described problems of the prior art, and an object thereof is to provide a sewing machine capable of efficiently sewing a large number of thick to-be-sealed products at the same time.

1 is an external perspective view of a multi-head sewing machine according to a first embodiment of the present invention.

FIG. 2 is a left side view of a portion of the multi-head sewing machine of FIG. 1 broken and enlarged; FIG.

3 is a plan view schematically showing a connection state of each book support and a drive shaft;

4 is a plan view schematically showing a connection state between each book support and a drive shaft in the second embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along the line A-A of FIG. 4 and shows a configuration in which the drive shaft is driven by the lower shaft through a power conversion mechanism.

(Explanation of symbols for the main parts of the drawing)

One ; Sewing table 2; Top horizontal frame

3; Missing arm 5; Needle bar

6; Libra 7; Drum support

8 ; Subframe 10; Half turn drum

11; Sewing unit 12; Missing headstock

13; Support 15; Timing pulley

16; Drive motor 20; Timing belt

21; Drive shafts 23, 25; Bevel Gear

24; North axis 26; Rocking cancer

27; Rotary arm 28; Connecting arm

29; Connecting pin 30; Seal Holder

The multi-head sewing machine in the present invention for solving the above-mentioned problems and suitably achieving the desired object includes a needle rod supported on a sewing arm provided above the sewing table, and a book support provided below the sewing table. And a plurality of sewing machine units for performing main rods in cooperation with the swing-type loop catcher supported, and a workpiece holding body for driving the coordinate plane XY bidirectionally from above the sewing table. It features.

The to-be-processed object held by the to-be-maintained body corresponding to each missing unit is simultaneously sewing by the corresponding missing unit.

(Example)

Next, the present invention will be described below with reference to the accompanying drawings, an embodiment applied to a multi-head embroidery sewing machine. 1 to 3 show a first preferred embodiment of the present invention. 1 is an external perspective view of a multi-head embroidery sewing machine in which an embodiment is implemented, in which an upper horizontal frame 2 is installed above a horizontal sewing machine table 1, and two sewing machines are provided on the front surface of the upper horizontal frame 2. FIG. Arms 3 and 3 are arranged at a predetermined interval in the horizontal direction. The needle bar 5 is freely supported by the needle bar 5 in the up-and-down motion, and the balance 6 corresponding thereto is freely supported by the sewing arm 3. 2, the cloth pressing member 9 is also supported by each sewing arm 3. As shown in FIG.

As shown in FIG. 2, the lower frame 8 is disposed below the sewing table 1, and each book support 7 is provided on the lower frame 8 so as to respectively correspond to the sewing arm 3. Located underneath). Moreover, as shown in FIG. 3, the drum holder 7 is supported by the semi-rotating drum 10 as a loop catcher of the swing type.

Each sewing arm 3 and the corresponding drum support 7 each comprise a sewing unit 11.

As shown in FIG. 2, each of the sewing arms 3 passes through the sewing spindle 12 so that rotation thereof extends freely. The left end of the spindle 12 is supported on the left side of the lower frame 8. It is supported by the bearing 14 provided in (13). A needle bar drive mechanism and a balance drive mechanism (all of which are not shown) are connected to the sewing machine spindle 12 in the sewing machine arm 3, and the needle bar drive mechanism and the needle bar drive mechanism are rotated to one side of the main shaft 12. The balance driving mechanism is driven, whereby the needle bar 5 and the balance 6 are driven. The timing pulley 15 is fixed to the projection from the bearing 14 in the sewing spindle 12, and the timing pulley 18 fixed to the pulley 15 and the motor shaft 17 of the drive motor 16 is fixed. ), The timing belt 20 hangs. The drive motor 16 is fixed to the support 13 at the rear of the upper horizontal frame 2 (see FIG. 1), and power is transmitted through the timing belt 20 in accordance with the drive of the drive motor 16. Thus, the sewing spindle 12 is driven to rotate in one direction.

As shown in FIG. 3, one drive shaft 21 common to each book support 7 is freely supported for rotation, and the left end of the drive shaft 21 is provided on the support 13 on the left side. It is supported by one bearing 22 (see FIG. 2). The drive bevel gears 23 are fixed to the drive shaft 21 in the drum support 7, and each drive bevel gear 23 is formed of the drum shaft 24 supporting the anti-rotating drum 10. Engaged in engagement with a driven bevel gear 15 fixed to the rear end.

As shown in FIG. 2, the rocking arm 26 is fixed to the site | part which the drive shaft 21 protrudes from the bearing 22, and it rotates in the same axis state as the said timing pulley 15 in the said sewing spindle 12. As shown in FIG. The arm 27 is fixed. At the ends of these rocking arms 26 and the rotating arm 27, connecting pins 29 and 29 are protruded in parallel with the rotational movement axis thereof. Then, the ends of the swinging arm 26 and the rotary arm 27 are connected by the connecting arm 28 via each connecting pin 29. In addition, the length of the swinging arm 26 is set larger than the length of the rotational arm 27, whereby the swinging arm 26 is rotated when the rotational arm 27 rotates according to the rotation of the sewing machine spindle 12. Through this connecting arm 28, rocking motion (described later) in a predetermined angle range is performed. Therefore, the drive shaft 21 is to reciprocate the rotation in a predetermined angle range in accordance with the rotation of the sewing machine spindle 12. For this reason, the semi-rotating book 10 shown in FIG. 3 performs reciprocating rotational motion by the drive drive of the drive shaft 21 and the bevel gears 23 and 25. FIG. At this time, the predetermined angle range of the rocking arm 26 is set such that the half-turn drum 10 reciprocates in the angle range around 218 °.

As shown in FIG. 1, the to-be-sealed object holding body 30 which comprises a rectangle is placed on the upper surface of the said sewing table 1. As shown in FIG. The object to be sealed 30 is connected to the X-direction drive mechanism 31 and the Y-direction drive mechanism 32 disposed below the sewing table 1, respectively, and is driven by driving the respective drive mechanisms. The sieve 30 moves the coordinate plane on the sewing table 1 in the XY direction. In order to set the to-be-measured object to the said to-be-measured body 30, it is encouraged to implement it through the frame which is not shown which supports each to-be-enclosed object individually, It is not limited to this.

According to the structure of Example 1, after setting the to-be-sealed material to be to-be-sealed, the holding body 30 starts when a multi-threaded sewing machine is started according to the sewing data input to an electrical control unit (not shown). It is driven synchronously with each sewing unit 11, and sewing according to the sewing data is performed. Furthermore, since the half-turn drum 10 is adopted, even if the thread used as a thick to-be-sealed thing is thick, the sewing texture is good and reliable sewing can be obtained.

4 and 5 show a second embodiment of the present invention, in which the same or equivalent members as those in the first embodiment are denoted by the same reference numerals and description thereof will be omitted. The second embodiment differs from the first embodiment in that it uses the lower shaft 35 which rotates forward when driving the full rotation book, and drives the drive shaft 37 through the power conversion mechanism 36. . The power conversion mechanism 36 includes an eccentric ring 38 fixed to the lower shaft 35, an eccentric pin 41 eccentrically protruding from the shaft end of the drive shaft 37, and one end. The ring portion 40a is fitted into the eccentric ring 38 to be engaged, and the arm 40 is formed by engaging the connection hole at the other end with the eccentric pin 41. When the lower shaft 35 is rotationally driven in one direction, the drive shaft 37 is reciprocally rotated in a predetermined angle range by the power conversion mechanism 36, whereby each half-rotating drum 10 ) Reciprocates in a predetermined angle range.

(Other embodiment)

(1) In the above-described embodiment, one needle rod is supported on the sewing arm, but a needle needle that supports a plurality of needle rods may be used.

(2) Although the sewing machine in which two sewing units are arrange | positioned was illustrated in the said embodiment, of course, it can be applied also to the sewing machine which arrange | positioned three or more sewing units.

(3) In the second embodiment, when a plurality of sewing units (e.g., 10 units) are mounted, the lower shaft is elongated and the power conversion mechanism of the plurality of sewing units (e.g. 5 units) is provided. A common drive shaft may be arranged for each group made of a book support, and may be driven by each power conversion mechanism.

(4) The drive shaft may be driven independently by a motor separate from the sewing arm side.

As described above, according to the multi-head sewing machine of the present invention, sewing is simultaneously performed on the sewing object corresponding to each sewing unit, so that sewing efficiency can be increased.

In addition, since the semi-rotating drum is adopted, good sewing of the sewing thread texture can be efficiently performed on the thick to-be-sealed object.

Claims (2)

Oscillating loop catcher supported by needle bar 5 supported by sewing arm 3 provided above sewing table 1 and book support 7 provided below this sewing table 1 ( In addition to providing a plurality of sewing machine units (11) for performing main rods in cooperation with 10), the workpiece holding body (30) which drives the coordinate plane XY in both directions above the sewing table (1) is provided. Multi-head sewing machine characterized in that provided. The method of claim 1, A multiple head sewing machine, characterized in that a plurality of swing-type loop catchers (10) supported by each of the book supports (7) are configured to be driven by a common drive shaft.