Classifications

• • D—TEXTILES; PAPER
  • D05—SEWING; EMBROIDERING; TUFTING
  • D05B—SEWING
  • D05B27/00—Work-feeding means
  • D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements

Definitions

• the invention relates to a sewing machine according to the preamble of patent claim 1.
• a sewing machine of the type mentioned is known from DE 74 30 111 Ul.
• This comprises a presser foot pivotably mounted about a horizontally aligned axis and cooperatively formed with a bottom transport device arranged on a support region for a material to be sewn, which has two material slides movably mounted to one another for the continuous transport of the material in one feed direction.
• a material slide is arranged in the feed direction in front of the axis of the presser foot and the other material slide behind it.
• the invention has for its object to improve a sewing machine of the type mentioned.
• 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.
• 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 slider.
• 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.
• FIG. 2 shows the lower transport device according to FIG. 1 in a second position
• FIG. 3 shows the lower transport device according to FIGS. 1 and 2 in a third position
• FIG. 4 shows in perspective the lower transport device according to FIGS. 1 to 3 and FIG. 4
• FIGS. 1 to 5 essentially show the so-called bottom feed of the sewing machine according to the invention.
• its precise arrangement within the sewing machine is for simplicity again on the above-mentioned DE 74 30 111 Ul (see there Figure 1) referenced, wherein the further technical embodiment, in particular the so-called top transport, in the sewing machine according to the invention can also be designed differently.
• the sewing machine (partially) shown in Figures 1 to 5 thus consists of a pivotable about a horizontally oriented axis 1 mounted presser foot 2. This is (not shown) arranged in a known manner on the axis 1 on a spring-loaded pusher rod and formed vertically movable. Furthermore, the presser foot 2 is formed cooperatively with the bottom feed device arranged on a support region 3 (indicated) for a material to be sewn (fabric, fabric or the like), which has two material slides 4, 5 movably mounted to one another for the continuous transport of the material in one feed direction , Which are formed toothed in a known manner on the material side.
• a material to be sewn fabric, fabric or the like
• the presser foot 2 has a supply and discharge region 14 bulging away from the material slides 4, 5 for the material and a contact region 15 extending parallel to the material slides 4, 5.
• the axis 1 arranged transversely to the feed direction is articulated on the contact region 15 of the presser foot 2.
• one of the two material slides 5 is provided with a vertically extended passage opening 16 for a sewing needle 17 (see FIG. 3).
• both material slides 4, 5 are formed horizontally in the direction of advance both in an area in front of and in a region after the axis 1 of the presser foot 2.
• the respective supernatant on both sides is preferably about 1 to 2 cm.
• 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.
• the material slides 4, 5, which (seen in the feed direction) have approximately the same length as the presser foot 2 are formed from a plurality of rows of teeth 6 extending parallel to one another and displaceably interlocking.
• a material slide 4 is formed from two long rows of teeth 6.1 and a short row of teeth 6.2.
• the other material slide 5 is formed from a wide row of teeth 6.3 and two adjacent to the wide row of teeth 6.3 narrow rows of teeth 6.4.
• the long rows of teeth 6.1 on both sides of the wide row of teeth 6.3 and 6.2 short row 6.2 between the two narrow rows of teeth 6.4 are arranged displaceably.
• the short row of teeth 6.2 which is (seen in the feed direction) in alignment with the passage opening 16 for the sewing needle 17, has proved to be particularly advantageous because it squeezes when sewing the seam just created against the presser foot 2 and thus a lateral Warpage of the material excludes.
• the material slides 4, 5 are particularly preferably arranged in each case on a carrier element 7, 8, whereby these are in turn formed extending parallel to one another.
• these are (see in particular FIGS. 4 and 5) arranged laterally parallel to the carrier elements 7, 8 by means of carrying plates 18, 19.
• both carrier elements 7, 8 for realizing a horizontal movement of the material slide 4, 5 (preferably) at one of its ends (in the figures 1 to 4 on the left in the picture) each hinged to a crank 9 rotatably.
• cranks 9 for the carrier elements 7, 8 are arranged on a common axis of rotation 10, wherein it is particularly preferred that the cranks 9 are arranged for the carrier elements 7, 8 on opposite sides of the axis of rotation 10.
• Figures 1 to 3 in which different rotational positions of the axis of rotation 10 (slightly to the right, slightly to the left, center) are shown, this proviso allows in particular in contrast to the aforementioned DE 74 30 111 Ul that both support elements 7, 8 can be operated with a single axis of rotation 10.
• both support elements 7, 8 are (in each case preferably displaceably connected to a guide 11) for realizing a vertical movement of the material slides 4, 5 at their other ends (in FIGS. 1 to 4 on the right in the image).
• These guides 11 for the support elements 7, 8 are arranged on a common axis of rotation 12, wherein it is particularly preferred that the guides 11 are arranged for the support elements 7, 8 on opposite sides of the axis of rotation 12, as this in particular in comparison to DE 74 30 111 Ul leads to a production technology simpler to manufacture solution, and in particular when the guides 11 are slot-shaped and in these arranged on the support elements 7, 8 guide elements 20 are slidably mounted.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Sewing Machines And Sewing (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43942897

Family Applications (1)

Country Status (5)

Families Citing this family (5)

Family Cites Families (13)

• 2010
  • 2010-01-19 DE DE102010005106.3A patent/DE102010005106B4/de active Active
• 2011
  • 2011-01-06 WO PCT/DE2011/000006 patent/WO2011088816A1/de active Application Filing
  • 2011-01-06 EP EP11706141A patent/EP2526223A1/de not_active Withdrawn
  • 2011-01-06 CN CN201180001028.1A patent/CN102317527B/zh active Active
  • 2011-07-07 US US13/135,491 patent/US20110308439A1/en not_active Abandoned

Non-Patent Citations (1)

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