KR20060115604A - Sewing machine with a base designed to hold interchangeable means for sewing fabrics using different types of stitch - Google Patents

Abstract

A sewing machine with a base designed to hole an interchangeable means for sewing fabrics using different types of stitches is provided to generate a consideration economic profit and to remove the necessity for purchasing two another devices. A sewing machine includes an upper head. A base member(2) includes a sewing member for forming a sewing stitch, a knotted stitch and a double-chain stitch and a support structure designed for receiving various movements. When the structure of the base member is inserted into the structure, the structure receives a penetrated bush(6) with a cylindrical shape. In the bush, one of ends of a shafts(7) is connected to a hook(5) and has a longitudinal hole for inserting the shaft. The components are maintained at the stable positions by at least a shim ring(8).

Description

SEWING MACHINE WITH A BASE DESIGNED TO HOLD INTERCHANGEABLE MEANS FOR SEWING FABRICS USING DIFFERENT TYPES OF STITCH}

1A shows the structure of a note stitch;

1B shows the structure of a double-chain stitch;

1 is a projection view showing a sewing machine including a base, according to the object of the present invention;

2 is a front projection view from the top of the base assembled with parts configured to sew note stitches;

3 is a side projection view from above of the base in FIG. 2;

4 is a developed side projection view seen from the top of the base in FIG. 2;

5 is a front projection view from the top of the base assembled with parts configured to sew a chain stitch;

FIG. 6 is a developed side projection view seen from the top of the base in FIG. 5; FIG.

FIG. 7 is a developed side projection view from the top of the base in FIG. 5;

<Description of the symbols for the main parts of the drawings>

1: sewing machine

2: base

5: hook

6: bush

7: axis

9: gear

12: spindle

The industrial patent invention application proposes a base specifically designed for industrial sewing machines, designed to mechanically sew two pieces of fabric using various types of sewing stitches by easily and quickly replacing several parts included in the sewing machine. do.

As a result, parts for sewing machines having a specific function can sew two pieces of fabric by at least two different types of sewing stitches by replacing some parts quickly and easily.

A sewing machine is, as is known, in most ordinary forms, a machine for sewing two fabrics mechanically. In the industry, it is recognized that different structural technologies are applied depending on the various operations they intend.

For example, single or multiple needle units are generally used to sew garments such as jeans or casual pants, work clothes and shirts or many other types.

The industrial sewing machine according to various forms can sew a yoke, top or bottom, leg riveting or various parts and can be used in various forms for light or heavy fabrics.

In general, all of the above versions include means for forming a sewing stitch with the needle, the base being positioned below the upper head and a system for supplying the fabric for sewing, and the upper head on which the needle is located. .

The rotational movement in the upper head, powered by an axis connected to the drive motor, is converted into reciprocating motion through an eccentric, which is then transmitted to the needle-holder support. A fabric-pressure foot is located in the upper head in a position proximate to the needle and functions to press the fabric operation to be sewn downward toward the lower base.

In general, a fabric feed system includes specific means that act to move the fabric in one direction and to sew it onto the fabric.

The base located at the bottom of the upper head includes one or more hooks that terminate the sewing stitch with the needle.

All of the above-described parts, in rotational and translational motion, move simultaneously with each other.

Of particular importance in the manufacture and configuration of sewing machines depends on the form of making the sewing stitch.

Of course, each different sewing stitch requires different movements and different parts by the parts. As a result, various sewing machines are used for various sewing stitches.

For example, in order to form a knot stitch according to the known art, the device must have a particular hook which is in synchrony and continuous rotational motion required for the translational movement of the needle corresponding to two 360 ° hook rotations. do.

On the other hand, the device for forming the chain stitch has concurrency requiring the translational movement of one needle corresponding to one movement by the hook, and the reciprocating and / or translational movement, and from the hook for the knot stitch It should have a hook that has a shape.

In addition, in order to form a note stitch with the need to exert a reciprocating force with the hook, manufacturers manufacture devices with structures that differ significantly from the structure of the device used to form the note stitch.

Another difference between the two types of devices is that the note stitch device has a robbin with a thread inserted inside the hook, while the chain stitch device has a variety of devices mounted outside of the device. There is.

An important and substantial difference between the two types of devices lies in the formation of the double-chain stitch shown in FIG. 1B and the note stitch shown in FIG. 1A, and in a wide variety of forms.

According to the known art, it is necessary to form two different types of sewing machines for two different types of sewing stitches.

This incurs significant costs for businesses or consumers in the textile industry that are required to provide speed flexibility, significant flexibility in functionality and flexible services in their methods.

The object of the invention, which is the object of the patent application, is to overcome not only the above mentioned problems but also other problems arising from a single device capable of alternately forming a note stitch and a double-chain stitch by simply and easily replacing some parts. have.

The above range and advantages according to the invention are achieved by a sewing machine characterized by having a base in the form for inserting a means designed to sew in a double-chain stitch alternately with a means configured to sew in a note stitch.

A device constructed in this way has the preferred advantage of forming two different types of sewing stitches by using a single structure in which a particular means can be replaced depending on the desired type of stitch.

It is therefore an object of the present invention to generate significant economic benefits and to eliminate the need to purchase two different devices. In addition, the sewing machine can be replaced by means configured for various types of stitches in a quick and easy manner. Other features and details of the invention will be more clearly understood in accordance with the given non-limiting examples, detailed description as well as the accompanying drawings.

In the accompanying drawings, the number 1 is basically all parts designed to work properly such as the upper head 4, the fabric movement device 3 and the base 2 and the present invention. Represents a sewing machine (base) comprising a base (base 2) according to the purpose of.

In particular, the base 2 accommodates a variety of movements and sewing means to form two different types of sewing stitches: knotted stitches and double-chain stitches. And a support structure 23 designed to be.

In one possible form the structure 23 of the base 2 shown in FIGS. 2, 3 and 4 is a cylindrically pierced bush which is stationary relative to the structure when inserted into the structure 23. 6) Accept. The bush 6 has a longitudinal hole 24 in which one of the ends of the shaft 7 is connected to the hook 5 and into which the shaft 7 is inserted. These parts are held in a stable position by at least one shim ring 8.

In addition, the gear 9 is fastened to the end of the shaft 7 opposite the end where the hook 5 is located. The gear is engaged by suitable means with the main shaft 12 which transmits power to the shaft 7 and then with the hook 5.

This makes it clear how the shaft 7 and the hook 5 rotate continuously when the main shaft 12 makes a continuous rotational motion.

The base 2 described above forms a knot type of stitch so that the movement of the needle of the sewing machine coincides with all the translational movements of the needle, and the corresponding two full turn rotations by the hook 5. ) Is formed.

When there is a need to form a double-chain stitch, the parts described above can be removed from the base 2 (hook 5, shim ring 8, bush 6, shaft 7 and gears). (9) The parts are replaced by new means combined to sew in a double-chain stitch.

The new shaped base 2 shown in FIGS. 5, 6 and 7 requires the insertion of a cylindrical bush 17 into a perforation in the structure 23. The bush has a longitudinal hole 25 positioned away from the center with respect to the axis of the bush itself.

The shaft 18 is located inside the hole 25. One of the ends of the shaft has a shim ring 16, hook bush 15, needle-guard, which are integrally formed with the hook bush 15, for example by means of certain coupling means such as screws. -guard 14 and hook 13 are formed.

The other end of the shaft 18 is connected to the main shaft 12 which reciprocally rotates the shaft 18 using certain means. This is achieved in particular by means of an eccentric 19 located inside the hole of the connecting rod 20, by means of the main shaft 12 making continuous rotation, with the ends of the opposing eccentric 19 being fixed. In turn in turn connected to the lever 21 fastened to the shaft 18.

Due to the lever, the continuous rotational movement of the main shaft 12 is converted into a reciprocating rotational movement, which is transmitted to the shaft 18 and consequently to the hook 13. This type of motion is designed to perform the type of motion required to form a chain stitch.

In this case, the means described above are also fastened to the structure 23 on the base 2 using clamping parts and assembly screws.

A device 11 designed to open a loop to form a chain, in particular an axis 11 which remains mounted on the base 2 in the presence of parts designed to form a note stitch, may be provided. .

The sewing machine according to the object of the present invention is provided with a base 2 comprising fastening means such as, for example, the structure 23, and parts (hook 5, bush 6, shaft 7, shim) configured to form a note stitch. Ring 8, gear 9) to be replaced with parts (hook 13, needle guard 14, hook bush 15, shim ring 16, shaft 18, lever 21, connecting rod 20, eccentric 19) configured to form a double-chain stitch Can be.

In particular, the moving parts replaced to form both a note stitch and a double-chain stitch are powered by the same main drive shaft 12.

Thanks to this sewing machine, it is possible to replace several parts easily and quickly, according to a known technique that can be performed in opposition by various sewing machines, and by double stitching with a note stitch as shown in FIGS. 1A and 1B. Two different types of stitching stitches can be formed.

In addition, removal and reinstallation of the various parts on the base 2 can be performed by a person skilled in the art without specialized knowledge.

Those skilled in the art can envision modifications or variations that are deemed to fall within the protection scope of the present invention.

Claims (7)

In a sewing machine, the sewing machine is designed to sew by forming a double-chain stitch (13, 14, 15, 16, 17, 18, 19, 20, 21) and means configured to sew by forming a note stitch ( A base 2 configured to alternately insert 5, 6, 7, 8, 9; and at least one said means 5, 6, 7, 8, 9, 13, 14, 15, 16, 17 , 18, 19, 20, 21 are connected to the main shaft 12 already formed in the sewing machine 1, the main shaft 12 being the means 5, 6, 7, 8, 9, 13, 14 , 15, 16, 17, 18, 19, 20, 21). 2. The main shaft (12) according to claim 1, wherein the main shaft (12) is connected to the shaft (7) by a mouth (9), the end of the shaft (7) is fixed to the hook (5), and the shaft (7) is a base (2). In the hole 24 of the bush 6 inserted into and through the shim ring 8, the means 7 and 9 perform a continuous rotational movement of the hook 5 to form a knot-type stitch. Sewing machine characterized in that the generation. The main shaft (12) according to claim 1, wherein the main shaft (12) is connected to the shaft (18) by levers (19, 20, 21), and the end of the shaft (18) is connected with the needle-guard (14) by the support (15). Secured to the hook 13, the shaft 18 moves in the hole 25 of the bush 17 inserted into the base 2 and through the shim ring 16, the means 18, 19, 20 , 21) sewing machine, characterized in that to generate a reciprocating rotational motion by the hook (13) to form a double-chain type stitch. 4. The eccentric of claim 3, which is in turn connected to the lever 21 coupled in a fixed state to the shaft 18, and inserted into the hole of the connecting rod 20, is coupled to the main shaft 12. Sewing machine, characterized in that the continuous rotational movement of the main shaft (12) is converted into reciprocating rotational movement by the shaft (18). 5. Sewing machine according to claim 3, 4, characterized in that the bush (17) is eccentric. According to the preceding claims, the means (11) in the base (2) is formed with a configuration for double-chain stitches and an arrangement for note stitches designed to open a loop to form a chain stitch, said means being only Sewing machine operating in an arrangement designed to form a chain stitch. 2. Remove the means 13, 14, 15, 16, 17, 18, 19, 20, 21 for the double-chain stitch or the means 5, 6, 7, 8, 9 for the note stitch. A method for doing this is possible by simply and quickly uncouple the means from the base (2), wherein the method of disconnection is carried out by a person skilled in the art.

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