DE102010005106A1 - sewing machine - Google Patents

Abstract

The invention relates to a sewing machine, comprising a presser foot (2) pivotally mounted about a horizontally aligned axis (1) and cooperatively formed with a bottom transporting device disposed on a support portion (3) for a material to be sewn, adapted for the continuous transport of the material Having a feed direction two movably mounted to each other material slide (4, 5). According to the invention, it is provided that both material slides (4, 5), viewed horizontally in the feed direction, are formed both in an area in front of and in an area beyond the axis (1) of the presser foot (2).

Description

The invention relates to a sewing machine according to the preamble of patent claim 1.

A sewing machine of the type mentioned is according to the DE 74 30 111 U1 known. This consists of a pivotable mounted about a horizontally oriented axis presser foot, which is formed cooperatively with a arranged on a support area for a material to be sewn material transporting device, which has two movable material slide mounted to each other for the continuous transport of the material in a feed direction. In this case, a material slide is seen in the feed direction in front of the axis of the presser foot and the other material slide arranged behind it.

As has been shown, the material is not optimally transported in this solution, which is noticeable in particular by the resulting folds.

The invention has for its object to improve a sewing machine of the type mentioned.

This object is achieved with a sewing machine of the type mentioned by the features listed in the characterizing part of patent claim 1.

According to the invention, it is thus provided that both material slides are designed to extend horizontally in the feed direction both into an area in front of and also into an area along the axis of the presser foot.

In other words, the present invention differs from the above-mentioned sewing machine in particular in that the material slide are formed significantly longer and each extend into the range of movement of the other material slide. This proviso has the consequence that the rotatably mounted presser foot, which forms the counterpart to the lower transport device is fully supported in each phase of operation and thus can not tip over as in the aforementioned sewing machine.

Other advantageous developments emerge from the dependent claims.

The sewing machine according to the invention including its advantageous developments according to the dependent claims will be explained in more detail with reference to the drawing of a preferred embodiment.

It shows

1 in side view a part of the sewing machine according to the invention in a first position;

2 the bottom transport device according to 1 in a second position;

3 the bottom transport device according to 1 and 2 in a third position;

4 in perspective, the lower transport device according to the 1 to 3 and

5 in perspective as a detail of the presser foot with the two material slides.

In the 1 to 5 is essentially the so-called bottom feed of the sewing machine according to the invention shown. Regarding its precise arrangement within the sewing machine is for simplicity again on the above-mentioned DE 74 30 111 U1 (look there 1 ), wherein the further technical design, in particular the so-called top transport, can also be executed deviating in the sewing machine according to the invention.

The in the 1 to 5 (partially) illustrated sewing machine thus consists of a about a horizontally oriented axis 1 pivotally mounted presser foot 2 , This is in a known manner over the axis 1 arranged on a spring-loaded printer rod (not shown) and formed vertically movable. Furthermore, the presser foot 2 with the on a support area 3 (indicated indicated) for a material to be sewn (fabric, fabric or the like) arranged bottom transport device cooperatively formed, which for the continuous transport of the material in a feed direction two movably mounted material slide 4 . 5 has, which are formed toothed in a known manner on the material side.

Further (see 2 ) has the presser foot 2 one of the material shifters 4 . 5 arched feed 13 and discharge area 14 for the material and one parallel to the material shifters 4 . 5 extended contact area 15 on. In this case, the axis arranged transversely to the feed direction 1 at the contact area 15 of the presser foot 2 hinged.

Continue (see 4 ) is one of the two material slides 5 with a vertically extending passage opening 16 for a sewing needle 17 (please refer 3 ) Mistake.

Essential for the sewing machine according to the invention is now that both material slide 4 . 5 horizontally in the feed direction both in an area before and in an area after the axis 1 of the presser foot 2 extends are formed. The respective supernatant on both sides is preferably about 1 to 2 cm.

As explained at the outset, this proviso according to the invention advantageously has the result that the material is optimally transported further during sewing and, in particular, no wrinkling occurs.

It is particularly preferred that the material slide 4 . 5 , which (seen in the feed direction) about the same length as the presser foot 2 have, from a plurality, mutually parallel and slidably interlocking rows of teeth 6 are formed. With reference to 4 is the one material slide 4 from two long rows of teeth 6.1 and a short row of teeth 6.2 educated. The other material slide 5 is from a wide row of teeth 6.3 and two to the wide row of teeth 6.3 subsequent narrow rows of teeth 6.4 educated. Furthermore, the long rows of teeth 6.1 on both sides of the wide row of teeth 6.3 and the short row of teeth 6.2 between the two narrow rows of teeth 6.4 slidably arranged. In particular, the short row of teeth 6.2 , which (seen in the feed direction) in alignment with the passage opening 16 for the sewing needle 17 is arranged, has proved to be particularly advantageous because this when sewing the seam just created against the presser foot 2 presses and thus excludes a lateral distortion of the material.

Like from the 1 to 4 As can be seen, the material slides 4 . 5 particularly preferably in each case on a carrier element 7 . 8th arranged, which in turn are formed extending parallel to each other. To below the material slide 4 . 5 To realize space for the thread guide, these are (see in particular 4 and 5 ) by means of support plates 18 . 19 laterally parallel offset to the support elements 7 . 8th arranged.

Furthermore, both carrier elements 7 . 8th for the realization of a horizontal movement of the material slide 4 . 5 (preferably) at one of its ends (in the 1 to 4 left in the picture) each on a crank 9 rotatably articulated. Here are the cranks 9 for the support elements 7 . 8th on a common axis of rotation 10 arranged, wherein it is particularly preferred that the cranks 9 for the support elements 7 . 8th on opposite sides of the axis of rotation 10 are arranged. As the 1 to 3 , in which different rotational positions of the axis of rotation 10 (slightly to the right, slightly to the left, center) are reproduced, this provision makes it possible in particular also in contrast to the aforementioned DE 74 30 111 U1 in that both support elements 7 . 8th with a single axis of rotation 10 can be operated.

It is further provided that both support elements 7 . 8th for realizing a vertical movement of the material slide 4 . 5 (preferably) at their other ends (in the 1 to 4 right in the picture) each with a guide 11 slidably connected. These guides 11 for the support elements 7 . 8th are on a common axis of rotation 12 arranged, wherein it is particularly preferred that the guides 11 for the support elements 7 . 8th on opposite sides of the axis of rotation 12 are arranged, since this in particular in comparison to DE 74 30 111 U1 leads to a manufacturing technology easier to manufacture solution, especially if the guides 11 slit-shaped and in these on the support elements 7 . 8th arranged guide elements 20 are stored displaceably.

The basic operation of the sewing machine according to the invention is already apparent from the DE 74 30 111 U1 , so that reference is made to this extent: The oscillating rotational movement of the axes of rotation 10 and 12 causes the material slides 4 . 5 move both horizontally and vertically while transporting the material in the feed direction, wherein the presser foot 2 as an anvil and fixation for the sewing process with the sewing needle 17 serves. Thanks to the interlocking, in front and behind the axle 1 of the presser foot 2 extended material slide 4 . 5 is the material optimally supported at each transport time, ie an unwanted drape when sewing is effectively prevented.

LIST OF REFERENCE NUMBERS

1

axis

2

presser foot

3

support area

4

Bar pusher

5

Bar pusher

6

teeth

6.1

long row of teeth

6.2

short row of teeth

6.3

wide row of teeth

6.4

narrow row of teeth

7

support element

8th

support element

9

crank

10

axis of rotation

11

guide

12

axis of rotation

13

feed area

14

discharge area

15

contact area

16

Through opening

17

sewing needle

18

support plate

19

support plate

20

guide element

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 7430111 U1 [0002, 0016, 0024, 0025, 0026]

Claims (10)

Sewing machine, comprising one about a horizontally oriented axis ( 1 ) pivotally mounted presser foot ( 2 ), with one at a support area ( 3 ) is designed to cooperate for a material to be sewn bottom transport device, for the continuous transport of the material in a feed direction two movably mounted material slide ( 4 . 5 ), characterized in that both material slides ( 4 . 5 ) horizontally in the feed direction both in an area before and in an area after the axis ( 1 ) of the presser foot ( 2 ) are formed. Sewing machine according to claim 1, characterized in that the material slides ( 4 . 5 ) of a plurality of mutually parallel and slidably interlocking rows of teeth ( 6 ) are formed. Sewing machine according to claim 1 or 2, characterized in that the material slide ( 4 . 5 ) each on a support element ( 7 . 8th ) are arranged. Sewing machine according to claim 3, characterized in that the carrier elements ( 7 . 8th ) are arranged extending parallel to each other. Sewing machine according to claim 3 or 4, characterized in that both support elements ( 7 . 8th ) for realizing a horizontal movement of the material slide ( 4 . 5 ) preferably at one of its ends in each case on a crank ( 9 ) are articulated rotatably. Sewing machine according to claim 5, characterized in that the cranks ( 9 ) for the support elements ( 7 . 8th ) on a common axis of rotation ( 10 ) are arranged. Sewing machine according to claim 6, characterized in that the cranks ( 9 ) for the support elements ( 7 . 8th ) on opposite sides of the axis of rotation ( 10 ) are arranged. Sewing machine according to one of claims 3 to 7, characterized in that both support elements ( 7 . 8th ) for realizing a vertical movement of the material slide ( 4 . 5 ) preferably at their other ends in each case with a guide ( 11 ) are slidably connected. Sewing machine according to claim 8, characterized in that the guides ( 11 ) for the support elements ( 7 . 8th ) on a common axis of rotation ( 12 ) are arranged. Sewing machine according to claim 9, characterized in that the guides ( 11 ) for the support elements ( 7 . 8th ) on opposite sides of the axis of rotation ( 12 ) are arranged.

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