JPH10285A - Multi-needles sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to sew quilting of a wider roll in a high speed and in closer mesh with less vibration adjustable to change its operation width as required. SOLUTION: Several upper sewing needle mechanisms 30 are put parallel to compose a sewing block 4. Several sewing blocks 4 are put parallel onto an upper horizontal frame 1 under which lower needle mechanisms 31 are put to meet such sewing blocks 4 with a space to pass through a quilt roll between the two. Each sewing block 4 is driven independently by being synchronized with lower needle mechanisms.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-needle sewing machine for sewing a material such as a quilted material by sewing a wide material.

[0002]

2. Description of the Related Art Generally, a sewing machine is composed of one sewing machine upper thread mechanism and one lower thread shuttle mechanism. However, in a sewing machine for business use, in addition to the above-described general mechanism, in order to sew a material such as a quilt web, a necessary number of sewing needles are provided in the width direction of the material web. The provided multi-needle sewing machine or multi-head sewing machine is provided.

[0003]

In the above multi-needle sewing machine, a sewing machine upper thread mechanism is provided on an upper horizontal frame (hereinafter, referred to as an "upper yoke"), and a lower horizontal frame (hereinafter, referred to as "upper yoke").
"Lower yoke". ) Is equipped with a sewing machine lower thread mechanism, and the whole is driven by one drive source. In such a multi-needle sewing machine, the inertia of the entire sewing machine becomes large, making it difficult to start and stop arbitrarily, and the presence of a movement direction conversion mechanism unique to the sewing machine increases vibration, making it impossible to increase the rotation speed. Problem.

On the other hand, a multi-head sewing machine is a machine in which a dynamic balance of sewing machine heads is arranged in parallel in a required number of width directions, so that the machine can be operated at a high speed. On the other hand, a large number of sewing machine heads are arranged in parallel. Therefore, there is a limit in reducing the interval between the needles due to the presence of the sewing machine head, and there is a problem that a fine quilting pattern cannot be obtained.

In order to solve the above problems, the present invention is capable of sewing a quilt at a small interval, suppressing vibration, enabling high-speed sewing of a wide quilt material at a high speed, and achieving a required sewing width. It is an object of the present invention to provide a multi-needle sewing machine capable of changing a functioning width of the sewing machine in accordance therewith.

[0006]

According to a first aspect of the present invention, there is provided a sewing machine block in which a plurality of sewing machine upper thread mechanisms are arranged in parallel, and a plurality of sewing machine blocks are arranged in parallel on an upper yoke. A sewing machine lower thread mechanism is disposed below the plurality of sewing blocks via a passage space of a material to be sewn in correspondence with the sewing machine block, and each of the sewing machine blocks includes the sewing machine lower thread mechanism. In this case, a driving force synchronized with the above is obtained, and the driving is performed independently.

With this configuration, a quilted raw material having a fine pattern can be obtained, and it is possible to increase the number of rotations while suppressing an increase in vibration and inertia, and to increase the sewing width. It is possible to change the width easily.

According to a second aspect of the present invention, there is provided a multi-needle sewing machine according to the first aspect, wherein a multi-needle sewing machine is sewn to form a free sewing locus on a surface of a product sewn by the sewing machine. And a feed mechanism for the material to be sewn. With this configuration, a quilt material sewn with an arbitrary pattern can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an overall configuration of a multi-needle sewing machine according to an embodiment of the present invention will be described with reference to FIGS. The upper yoke 1 and the lower yoke 2 are integrally connected by a column 3 to form a frame F. On the upper yoke 1 of the frame F, a sewing machine block 4 provided with a plurality of sewing machine upper thread mechanisms 30 in parallel in its length direction is installed (here, three sewing machine blocks are installed). A sewing machine lower thread mechanism 31 is disposed corresponding to the sewing machine block 4. Here, a shuttle mechanism is employed as the sewing machine lower thread mechanism 31 in correspondence with each sewing machine upper thread mechanism 30.
A shuttle knitting mechanism or a looper knitting mechanism can be adopted as another sewing machine lower thread mechanism.

The driving force of the drive motor 5 of the sewing machine is transmitted to the main shaft 7 via timing pulleys 6a and 6c and a timing belt 6b, and the timing pulleys 9a and 9c and the timing belt 9b provided at positions corresponding to the respective sewing blocks. Through the drive shaft 27 of the sewing machine block 4. On the other hand, at the same time, the power is also transmitted from the main shaft 7 to the drive shaft 28 of the sewing machine lower thread mechanism 31 via the timing pulleys 10a and 10c and the timing belt 10b.

The entire frame F is slidably mounted on the base frame 11 in the width direction of the material to be sewn. Specifically, a guide rail 12 is laid on the upper surface of the base frame 11, and the frame F is placed on the guide rail 12 via slide shoes 13 provided at the front and rear lower portions of both ends of the frame F in the above-described direction. It is slidably ridden.

In order to slide the frame F in the width direction of the web, a motor 17 is suspended on the lower surface of the base frame 11 and supported on the bearing 16 via timing pulleys 18a and 18c and a timing belt 18b. The driven ball screw 15 is driven. This ball screw 15
The frame F is screwed onto a ball nut 14 suspended from the bottom of the frame F, and the frame F reciprocates on the base frame 11 by forward and reverse rotation of the motor 17.

The base frame 11 is provided with a mechanism for synchronously feeding upper cloth cloth A1, batting cloth A2, and lower cloth cloth A3, which are sewing materials, at a sewing speed. The feeding mechanism for each dough is the leg of the base frame 11 (lower left in FIG. 1).
The sprocket 20a, the tension-adjusting sprocket T, the sprocket 20c, and the sprocket 20c 'fitted around the main shaft of the geared motor 19 provided in the roller chain 20b circulate around the cloth and the quilted raw material feeding mechanism. It is transmitted to one of the drive shafts 21. The transmitted driving force is
The power is also transmitted to the other drive shaft 21 by the gear 22, and transmitted to the front feed rollers 24 and 25 and the rear feed rollers 24 ′ and 25 ′ through the universal joint 23, and to 24, 25, 2
4 'and 25' rotate in the opposite direction to each other and each dough A1,
A2, A3 and the sewn quilt material are fed. Both ends of each feed roller 24, 25 and 24 ', 25'
Each fabric or quilt to be fed is supported by pressure adjusting bearings 26, 26 for holding the fabric with an appropriate pressure.

The seam pattern for the quilt sewing is formed by controlling the above-mentioned reciprocating sliding of the frame F in the width direction of the web and the feed speed of the feeding mechanism of the cloth and the sewn web, as required. Is attached.

Next, details of the sewing machine block 4 will be described with reference to FIGS. Timing pulleys 9a, 9c and timing belt 9b from the main shaft 7
The driving force transmitted to the drive shaft 27 via the drive shaft 27 (see FIGS. 1 and 2) is applied to each of the sewing machine upper thread mechanisms 3 mounted on the upper yoke 1.
0, the holding bar 4e, the needle bar 4f, the balance device 4h
Drive while taking timing with each other. 4g
Is a thread tension adjuster. Here, the timing pulley 9
By providing a known clutch mechanism (not shown) between the sewing machine block c and the drive shaft 27, only the necessary sewing machine block is operated according to the width of the quilted material to be sewn, and a clutch mechanism for an extra sewing machine block is provided. Can be removed and put to rest.

Two needle bars are provided on both sides of the entire sewing machine block 4. A needle mounting rod 4d is fixed to the lower end of the sewing machine block 4 via a metal fitting 29, and two needle bars are attached to the needle mounting rod 4d back and forth in the sewing direction. 8 rows, 16 sewing needles 4a in total
Is attached. Similarly, two presser bars 4f are provided on both sides of the sewing machine block 4 and adjacent to the needle bar 4e, and a presser foot mounting rod 4c is fixed to the lower end thereof. The presser bar mounting rod 4c is attached to the sewing machine needle 4a. A corresponding presser foot 4b is fixed. In this embodiment,
Although the number of sewing needles is eight in two rows, that is, 16 in total, the number is not limited thereto, and the number can be changed as appropriate.

The thread tension adjuster 4g of the sewing machine block 4
Is adjusted properly, and is passed through the hole of the sewing needle 4a via the thread hook 4i, the balance 4h, and the thread break sensor 4j while the tension of the sewing thread fed from the upper thread bobbin (not shown) is adjusted to be constant. You. The driving force of the sewing machine motor 5 is
The power is transmitted to the drive shaft 27 of the sewing machine block 4 via the main shaft 7. When the drive shaft 27 of the sewing machine block 4 is driven, the presser bar 4e, the needle bar 4f, and the weighing device 4h operate while taking the timing as described above.
Top cloth cloth A1, batting cloth A2 and top cloth cloth A3 all at once
Pass through.

On the other hand, the driving force of the sewing machine motor 5 is
Is also transmitted to the drive shaft 28 of the sewing machine lower thread mechanism 31. By the rotation of the drive shaft 28, the sewing machine lower thread mechanism 31 employing the shuttle mechanism operates with timing with the sewing machine upper thread mechanism 30, and passes through the holes of the sewing needle passing through the fabrics A1, A2, and A3. A shuttle mechanism acts on the sewing thread to entangle the lower thread and perform sewing. If a yarn break occurs during operation, the sensor 4j operates to stop the entire machine. Also, when the bobbin thread breaks, it is not shown, but is similarly detected and stopped.

[0019]

As described above, according to the present invention,
Quilt sewing at small intervals is possible, vibration is suppressed, high-speed and wide quilting material can be sewn at high speed, and the function width of the sewing machine can be changed according to the required sewing width. .

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an enlarged front view of the same part.

FIG. 4 is a side view of the same.

[Explanation of symbols]

 Reference Signs List 1 upper horizontal frame (upper yoke) 2 lower horizontal frame (lower yoke) 3 column 4 sewing machine block 4a sewing machine needle 4b presser foot 4c presser foot mounting rod 4d needle mounting rod 4e presser bar 4f needle bar 4g thread tension adjuster 4h balance Apparatus 4i Thread hook 4j Thread break sensor 5 Sewing motor 7 Main shaft 8 Bearing 11 Base frame 12 Guide rail 13 Slide shoe 14 Ball nut 15 Ball screw 16 Bearing (of ball screw) 17 Motor (for driving ball screw) 19 Geared motor (for driving feed roller) 21) Drive shaft (of feed roller) 22 Gear 23 Universal joint 24, 24 ', 25, 25' Feed roller 26 Pressure adjusting bearing 27 Drive shaft (of sewing machine block) 28 Drive shaft (of sewing machine lower thread mechanism) 29 Metal fitting 30 Sewing machine upper thread mechanism 31 Lower thread mechanism F frame

Claims (2)

[Claims] 1. A sewing machine block comprising a plurality of sewing machine upper thread mechanisms arranged in parallel, a plurality of sewing machine blocks arranged in parallel on an upper horizontal frame, and a raw material to be sewn under the plurality of sewing blocks. A sewing machine lower thread mechanism is provided in correspondence with the sewing machine block via a passage space, and each of the sewing machine blocks obtains a driving force synchronized with the sewing machine lower thread mechanism and is independently driven. Features a multi-needle sewing machine. 2. In order for the multi-needle sewing machine to form a free sewing locus on the surface of a product sewn by the sewing machine,
2. The multi-needle sewing machine according to claim 1, further comprising a mechanism for sliding the multi-needle sewing machine in a width direction of the material to be sewn, and a feeding mechanism for the material to be sewn.