JPH0663262A - Pattern sewing method and multi-head sewing machine for long-sized cloth - Google Patents

Abstract

(57) [Summary] [Purpose] When sewing a pattern to be laid out in the longitudinal direction on a long cloth with a multi-head sewing machine, it is possible to increase the operating rate of a large number of sewing machine heads, and the range of the total length of the long cloth. Make it possible to sew the pattern in a short time. [Structure] A long cloth is partially held by a cloth tension frame and sewn by a large number of sewing heads. After sewing, the long cloth is repositioned in the longitudinal direction with the longitudinal direction parallel to the direction in which a large number of sewing machine heads are arranged side by side. Such sewing and position change are alternately repeated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sewing a pattern on a long cloth and a multi-head sewing machine used therefor.

[0002]

2. Description of the Related Art A multi-head sewing machine has a large number of sewing heads (hereinafter also simply referred to as heads) above a table 1k as shown in FIG.
9k are installed side by side. By simultaneously operating those heads 9k, a large number of patterns can be simultaneously and efficiently sewn on the cloth on the table.

Sewing of a plurality of long cloths using the above multi-head sewing machine is as follows. As shown in FIG. 6, the long cloths 14k and 14k 'are arranged in parallel. On the table 1k, a part of each long cloth 14k, 14k 'is held by the cloth tension frame 5k. The cloth tension frame 5k is horizontally moved, and the pattern 18k is sewn on each part of the held cloth by using the plurality of heads 9k. Next, for the cloth tension frame 5k, long cloth 14k,
Reposition 14k 'in the direction of arrow 17k and hold the next part.
By repeating these operations, multiple long cloths 14k,
With respect to 14k ', a plurality of rows of patterns 18k can be simultaneously and efficiently sewn. In FIG. 7, which shows the sewing state of the long cloth 14k, 21k, 22ak, 22bk, and 23k indicate unit sewing sections that can be sewn by holding the cloth tension frame 5k once, and 21k of these are currently being sewn. A section, 22ak indicates a previous sewing section, 22bk indicates a second previous section, and 23k indicates a next section.

[0004]

However, in the above-mentioned conventional sewing method, when only one piece of processing is requested, for example, only the long cloth indicated by the reference numeral 14k in FIG. With only two heads, 9m and 9n,
The other 18 heads 9k are all inactive. Further, since only a part of the heads are operated, it takes a very long time to finish one long cloth.

The present invention has been made in order to solve the above-mentioned problems (technical problems) of the prior art. It is possible to increase the operating rate of a large number of heads, and to obtain a pattern in the range of the entire length of a long cloth. An object of the present invention is to provide a pattern sewing method and a multi-head sewing machine for a long cloth which can be sewn in a short time.

[0006]

In order to achieve the above object, a pattern sewing method for a long cloth in the present invention is
In a method of sewing a pattern to be arranged in a longitudinal direction on a long cloth by using a plurality of sewing heads arranged in parallel, the method is a method in which a part of the long cloth is It is held by a cloth tension frame having a size that surrounds the sewable area at a time, and the held portion is sewn with a pattern by using the sewing machine head at a position corresponding to the above-mentioned pattern among the large number of sewing heads. Step and the long cloth,
The longitudinal direction is made parallel to the juxtaposed direction of the sewing machine heads, and the step of repositioning the cloth tension frame in the longitudinal direction of the long cloth is alternately repeated.

[0007]

The long cloth is received on the table through the entrance and a part of the long cloth is held by the cloth tension frame. The held long cloth is sewn by a large number of heads. When the sewing is completed, the long cloth is repositioned with respect to the cloth tension frame with the longitudinal direction parallel to the direction in which the heads are arranged, and the next part is held. The sewing and the position change of the long cloth are alternately repeated, and the pattern is sewn in the range of the entire length of the long cloth. The part where the pattern sewing is completed is sent out through the exit.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, 1 to 9 relate to a commonly known multi-head sewing machine, 1 is a table, 2 is a bed,
3 is a drive unit for driving the upholstered frame in the front-back direction 3a, 4 is a drive unit for driving in the left-right direction 4a, 5 is a upholstered frame, 6 is a bridge, 7 is its leg part, 8 is a girder part , 9 indicate a large number of heads attached to the girder portion 8, respectively. The size of the table 1 is, for example, width (length of the heads 9 arranged in parallel) of 3.4 m and depth.
It is 1.4m. The upholstered frame 5 is configured to have a size large enough to enclose a region that can be sewn at once with a large number (20 in this example) of heads 9, and has a width of 2.8 m and a depth of 0.75 m. The number of heads 9 may be about 10 of the above 20 units. The array pitch of the heads 9 is, for example, 13.54 cm. Next, 11 is a large number of heads 9 on the upper surface of the table 1.
An inlet provided at one end on the side of the arrangement direction and an outlet 12 provided at the end on the other side are formed by forming the leg portion 7 in the shape as shown in the drawing. In addition, 7a shows an establishment part, and 7b shows a horizontal installation part, respectively. Next, 14 is a long cloth to be sewn, 15 is an original roll thereof, and 16 is a supporting frame. Although not shown in the drawing, a support frame used to wind up the long cloth coming out of the outlet 12 is also provided on the outlet 12 side. Examples of the long cloth 14 include curtain cloth, cloth that is cut into shorts, and used for tailoring clothes.

Next, the sewing of the long cloth 14 using the multi-head sewing machine will be described. First, the long cloth 14 is pulled out from the original fabric roll 15 on the support frame 16 and brought to the position of the cloth tension frame 5 on the table 1 through the inlet 11 in a state where the longitudinal direction of the cloth 14 is parallel to the juxtaposed direction of the heads 9. Then, as the first step, the cloth
14 is held by the cloth tension frame 5. Then, the head 9 is operated and the cloth tension frame 5 is moved in the directions of the arrows 3a and 4a to sew the cloth 14 in a predetermined pattern. Next, as a second step, the portion of the cloth 14 that has been sewn is removed from the cloth tension frame 5, and the cloth 14
Is moved to a longitudinal direction parallel to the juxtaposed direction of the heads 9 as indicated by an arrow 17, and the portion to be sewn next to the pattern is brought to the position of the cloth tension frame 5. Hereinafter, the first and second steps are alternately repeated to sew a predetermined pattern over the entire length of the long cloth 14. The portion of the cloth 14 that has been sewn is sent out from the outlet 12 and wound into a roll again.

Next, FIG. 3 shows a sewing state of a pattern on the long cloth 14. Reference numeral 18 shows a unit pattern in which sewing is performed by one head 9. The unit pattern 18 is not limited to the circular pattern shown in the drawing, but may have an arbitrary pattern arranged within the circle. Reference numeral 21 denotes a unit sewing section which is sewn by holding the cloth tension frame 5 once. 22 shows the already sewn part, and 23 shows the next sewn part. In FIG. 2, 22a indicates a previously sewn unit sewing section of the already sewn portion, and 22b indicates a two-previous unit sewing section.

Next, the sewing of the section 21 is as follows. Long cloth
If 14 is held by the cloth tension frame 5, all heads 9 (reference numerals 9a to 9e in FIG. 2) located at positions corresponding to the pattern to be formed.
(Except for the five units shown in FIG. 3) are operated to sew the unit patterns 18 in the range indicated by reference numeral 24 in FIG. 3 at a time. Next, the cloth tension frame 5 is moved in the direction of the arrow 25 as shown in FIG. 2, and the unit patterns 18 in the range indicated by reference numeral 26 in FIG. After that, the cloth tension frame 5 is returned to the original position and the long cloth 14 is released. Cloth tension frame 5
The attachment and detachment of the long cloth to and from may be performed with the cloth tension frame at either the front position or the rear position on the table.

As is clear from the above description, the longitudinal direction of the long cloth is parallel to the direction in which the heads 9 are arranged side by side, and the cloth tension frame 5
Is formed in such a size that it encloses an area that can be sewn at once by a large number of heads 9, so that a large number of heads 9 can be operated at a time.

A specific example will be shown below. The length is 50m, the pattern arrangement is 2 rows in the width direction, and about 5.6 per 1m in the length direction.
The number of stitches required to sew one or one unit pattern is 3000 stitches, 1
A long piece of cloth with a time required to sew individual unit patterns of 5 minutes (the head spindle speed is 600 times per minute) is shown in Figs.
Table 1 shows a comparison between the case of sewing as shown in FIG. 6 and the case of sewing as shown in FIGS.

[0014]

[Table 1]

As is apparent from Table 1 above, the method of FIGS. 2 and 3 can finish one sheet of material in an extremely short time as compared with the method of FIGS.

Next, FIG. 4 shows a state in which a continuous pattern is sewn on the long cloth 14 using the multi-head sewing machine shown in FIGS. In the case of sewing such a continuous pattern, the pattern 18 of one unit sewing section 21
And the pattern 18 of the other unit sewing section 21 'may become discontinuous 19 as shown in the enlarged view of the figure. However, according to the multi-head sewing machine and the sewing method, since the length L of the unit sewing section is long, such a discontinuous portion can be reduced. The distance between the discontinuous portions is the same as the above L and is very far. Therefore, even when the long cloth is used in a long state, such a discontinuous portion 19 becomes very inconspicuous.

Next, FIG. 5 shows a different embodiment of the present invention, in which the leg portion 7f of the bridge 6f is constituted by a standing portion 7af on the rear end side of the bed and a horizontal portion 7bf taken out from the standing portion 7af as shown in the figure. By this, the table at the entrance 11f
In this example, the front part of 1f is opened. In this open state, the operation of pulling the leading end of the long cloth from the original roll onto the table is facilitated. A similar configuration may be applied to the exit. In the case of the above configuration, in order to prevent the girder portion 8f from being lowered due to the bending of the leg portion 7f in the bridge 6f, arbitrary structures such as a multi-head sewing machine are accommodated by the suspension rods 30 at a plurality of places of the girder portion 8f. It is good to connect to the building. It should be noted that the parts that are considered to have the same or equivalent configurations as those in the previous figure in terms of function are denoted by the same reference numerals as in the previous figure with the letter f attached, and redundant description is omitted.

[0018]

As described above, according to the present invention, when the pattern 18 to be arranged in the longitudinal direction is sewn to the long cloth 14, the long cloth 14 is sequentially sewn while repeating the position change. Therefore, the pattern 18 can be sewn over the entire length of the long cloth 14, and in the above case, the long cloth 14 has a longitudinal direction parallel to the direction in which the heads 9 are arranged side by side. The effect is that you can efficiently sew all or most of them. This has the advantage that the operating rate of the head 9 can be extremely increased, and, as seen from the side of the long cloth 14, it is possible to sew many patterns 18 at once.
There is an effect that the pattern sewing within the entire length of the long cloth 14 can be performed in a short time.

[Brief description of drawings]

FIG. 1 is a perspective view.

FIG. 2 is a plan view.

FIG. 3 is a plan view showing a sewing state of a pattern on a long cloth.

FIG. 4 is a plan view of a long cloth showing sewing states of different patterns.

FIG. 5 is a partial perspective view showing another embodiment.

FIG. 6 is a plan view showing a conventional sewing method.

FIG. 7 is a plan view showing a sewing state of a pattern on a long cloth by a conventional method.

[Explanation of symbols]

 1 table 5 cloth tension frame 9 head 11 inlet 12 outlet 14 long cloth

Claims (2)

[Claims] 1. A method of sewing a pattern to be arranged in a longitudinal direction on a long cloth by using a plurality of sewing machine heads arranged in parallel, the method comprising: It is held by a cloth tension frame of a size that encloses an area that can be sewn at once by a large number of sewing heads, and the sewing head at the position corresponding to the above-mentioned pattern is used for the held portion. The step of sewing the pattern,
With the long cloth in a state where its longitudinal direction is parallel to the direction in which the sewing machine heads are arranged side by side, two steps, that is, the step of repositioning the long cloth in the longitudinal direction of the long cloth, are alternately repeated. A method for sewing a pattern on a long cloth, which is characterized in that 2. A multi-head sewing machine in which a plurality of sewing machine heads for sewing a part of a long cloth positioned on the table are arranged side by side above the table. It has an inlet for receiving the long cloth to be placed on the table from one side of the sewing machine head in the juxtaposed direction on the table, and an outlet for sending the long cloth on the table from the other side. A multi-head sewing machine characterized by doing.