U.S. patent application number 13/135491 was filed with the patent office on 2011-12-22 for sewing machine.
This patent application is currently assigned to Xi'an Typical GmbH. Invention is credited to Michael Bernhart, Franz Gries, Holger Labes.
Application Number | 20110308439 13/135491 |
Document ID | / |
Family ID | 43942897 |
Filed Date | 2011-12-22 |
United States Patent
Application |
20110308439 |
Kind Code |
A1 |
Gries; Franz ; et
al. |
December 22, 2011 |
Sewing machine
Abstract
A sewing machine includes a presser foot (2) mounted pivotably
about a horizontally aligned axis (1), which is configured to
cooperate with an undertransporting apparatus disposed on a support
area (3) for a material to be sewn, which includes two material
sliders (4, 5) mounted movably with respect to one another for the
continuous transport of the material in a feed direction. Both
material sliders (4, 5) are configured to be extended horizontally
when viewed in the feed direction both in a region before and in a
region after the axis (1) of the presser foot (2).
Inventors: |
Gries; Franz; (Trippstadt,
DE) ; Bernhart; Michael; (Trippstadt, DE) ;
Labes; Holger; (Kaiserslautern, DE) |
Assignee: |
Xi'an Typical GmbH
Kaiserslautern
DE
|
Family ID: |
43942897 |
Appl. No.: |
13/135491 |
Filed: |
July 7, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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PCT/DE2011/000006 |
Jan 6, 2011 |
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13135491 |
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Current U.S.
Class: |
112/318 ;
112/235 |
Current CPC
Class: |
D05B 27/02 20130101 |
Class at
Publication: |
112/318 ;
112/235 |
International
Class: |
D05B 27/10 20060101
D05B027/10; D05B 29/00 20060101 D05B029/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 19, 2010 |
DE |
10 2010 005 106.3 |
Claims
1. A sewing machine comprising a presser foot (2) mounted pivotably
about a horizontally aligned axis (1), which is configured to
cooperate with an undertransporting apparatus disposed on a support
area (3) for a material to be sewn, which comprises two material
sliders (4, 5) mounted movably with respect to one another for the
continuous transport of the material in a feed direction, wherein
both material sliders (4, 5) are configured to be extended
horizontally when viewed in the feed direction both in a region
before and in a region after the axis (1) of the presser foot
(2).
2. The sewing machine according to claim 1, wherein the material
sliders (4, 5) are formed from a plurality of rows of teeth (6)
which extend parallel to one another and intermesh
displaceably.
3. The sewing machine according to claim 1, wherein the material
sliders (4, 5) are each disposed on a support element (7, 8).
4. The sewing machine according to claim 3, wherein the support
elements (7, 8) are arranged extended parallel to one another.
5. The sewing machine according to claim 3, wherein both support
elements (7, 8) are preferably each rotatably hinged at one of
their ends on a crank (9) in order to achieve a horizontal movement
of the material sliders (4, 5).
6. The sewing machine according to claim 5, wherein the cranks (9)
for the support elements (7, 8) are disposed on a common axis of
rotation (10).
7. The sewing machine according to claim 6, wherein the cranks (9)
for the support elements (7, 8) are disposed on mutually opposite
sides of the axis of rotation (10).
8. The sewing machine according to claim 3, wherein both support
elements (7, 8) are preferably each displaceably connected to a
guide (11) at their other ends to achieve a vertical movement of
the material sliders (4, 5).
9. The sewing machine according to claim 8, wherein the the guides
(11) for the support elements (7, 8) are disposed on a common axis
of rotation (12).
10. The sewing machine according to claim 9, wherein the guides
(11) for the support elements (7, 8) are disposed on mutually
opposite sides of the axis of rotation (12).
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] Applicants claim priority under 35 U.S.C. .sctn.119 of
German Application No. 10 2010 005 106.3 filed Jan. 19, 2010.
Applicants also claim priority and this application is a
continuation under 35 U.S.C. .sctn.120 of International Application
No. PCT/DE2011/000006 filed Jan. 6, 2011, which claims priority
under 35 U.S.C. .sctn.119 of German Application No. 10 2010 005
106.3 filed Jan. 19, 2010. The international application under PCT
article 21(2) was not published in English. The disclosures of the
aforesaid International Application and German Application are
incorporated herein by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The invention relates to a sewing machine.
[0004] 2. The Prior Art
[0005] A sewing machine of the type specified initially is known
from DE 74 30 111 U1. This consists of a presser foot mounted
pivotably about a horizontally aligned axis, which is configured to
cooperate with an undertransporting apparatus disposed on a support
area for a material to be sewn, which comprises two material
sliders mounted movably with respect to one another for the
continuous transport of the material in a feed direction. In this
case, one material slider is located in front of the axis of the
presser foot and the other material slider is located therebehind
when viewed in the feed direction.
[0006] As has been shown, the material is not optimally transported
in this solution, which is made particularly noticeable due to the
fall of the folds.
SUMMARY OF THE INVENTION
[0007] It is the object of the invention to improve a sewing
machine of the type specified initially.
[0008] This object is achieved with a sewing machine of the type
specified initially by the features according to the invention.
[0009] According to the invention it is therefore provided that
both material sliders are configured to be extended horizontally
when viewed in the feed direction both in a region before and in a
region after the axis of the presser foot.
[0010] In other words, the present invention differs from the
sewing machine specified initially in particular in that the
material sliders are configured to be significantly longer and each
extend into the area of movement of the other material slider. This
stipulation has the result that the rotatably mounted presser foot
which forms the counterpart to the undertransporting apparatus is
supported over its entire surface in each operating phase and
consequently cannot tilt away as in the sewing machine specified
initially.
[0011] Other advantageous further developments are discussed
below.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The sewing machine according to the invention including its
advantageous further developments discussed below is explained in
detail hereinafter with respect to the diagrammatic representation
of a preferred exemplary embodiment.
[0013] In the figures
[0014] FIG. 1 shows in side view a part of the sewing machine
according to the invention in a first position;
[0015] FIG. 2 shows the undertransporting apparatus according to
FIG. 1 in a second position;
[0016] FIG. 3 shows the undertransporting apparatus according to
FIGS. 1 and 2 in a third position;
[0017] FIG. 4 shows in perspective view the undertransporting
apparatus according to FIGS. 1 to 3 and
[0018] FIG. 5 shows in perspective view as a detail the presser
foot with the two material sliders.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0019] FIGS. 1 to 5 substantially show the so-called undertransport
of the sewing machine according to the invention. For the sake of
simplicity, reference is again made to the initially specified DE
74 30 111 U1 (see FIG. 1 there) with regard to the more precise
arrangement thereof inside the sewing machine, wherein the further
technical configuration, in particular the so-called upper
transport, can also be designed differently in the sewing machine
according to the invention.
[0020] The sewing machine shown in FIGS. 1 to 5 (in part) therefore
consists of a presser foot 2 mounted pivotably about a horizontally
aligned axis 1. This is disposed in a known manner above the axis 1
on a spring-loaded presser bar (not shown) and is configured to be
vertically movable. Furthermore, the presser foot 2 is configured
to cooperate with the undertransporting apparatus disposed on a
support area 3 (shown indicated) for a material to be sewn
(material, fabric or the like), which comprises two material
sliders 4, 5 mounted movably with respect to one another for the
continuous transport of the material in a feed direction, which are
configured to be toothed on the material side in a known
manner.
[0021] Furthermore (see FIG. 2), the presser foot 2 has a feed
region 13 and removal region 14 for the material, which is curved
away from the material sliders 4, 5, and a contact region 15
extending parallel to the material sliders 4, 5. In this case the
axis 1 located transversely to the feed direction is hinged on the
contact region 15 of the presser foot 2.
[0022] In addition (see FIG. 4) one of the two material sliders 5
is provided with a vertically extending through opening 16 for a
sewing needle 17 (see FIG. 3).
[0023] It is now essential for the sewing machine according to the
invention that both material sliders 4, 5 are configured to extend
horizontally when viewed in the feed direction both in a region
before and in a region after the axis 1 of the presser foot 2. The
respective overhang on both sides is preferably about 1 to 2
cm.
[0024] As mentioned initially, this stipulation according to the
invention advantageously has the result that the material during
sewing is optimally further transported and in particular wrinkles
are not formed.
[0025] It is particularly preferably provided that the material
sliders 4, 5 which have approximately the same length as the
presser foot 2 (when viewed in the feed direction), are formed from
a plurality of rows of teeth 6 extending parallel to one another
and intermeshing displaceably. With reference to FIG. 4, one
material slider 4 is formed from two long rows of teeth 6.1 and one
short row of teeth 6.2. The other material slider 5 is formed from
one broad row of teeth 6.3 and two narrow rows of teeth 6.4
adjoining the broad row of teeth 6.3. Furthermore, the long rows of
teeth 6.1 are disposed on both sides of the broad row of teeth 6.3
and the short row of teeth 6.2 is disposed displaceably between the
two narrow rows of teeth 6.4. In particular, the short row of teeth
6.2 which is disposed (when viewed in the feed direction) in
alignment with the through opening 16 for the sewing needle 17, has
proved to be particularly advantageous since during sewing this
presses the seam just produced against the presser foot 2 and
thereby eliminates any lateral warpage of the material.
[0026] As can be seen from FIGS. 1 to 4, the material sliders 4, 5
are particularly preferably each disposed on a support element 7,
8, these in turn being configured to extend parallel to one
another. In order to achieve space for the thread guide underneath
the material sliders 4, 5, these (see in particular FIGS. 4 and 5)
are arranged laterally parallel offset to the support elements 7, 8
by means of supporting plates 18, 19.
[0027] Furthermore, both support elements 7, 8 are each rotatably
hinged on a crank 9 (preferably) at one of their ends (in FIGS. 1
to 4 on the left in the diagram) in order to achieve a horizontal
movement of the material sliders 4, 5. In this case, the cranks 9
for the support elements 7, 8 are disposed on a common axis of
rotation 10, wherein it is particularly preferably provided that
the cranks 9 for the support elements 7, 8 are disposed on mutually
opposite sides of the axis of rotation 10. As shown in FIGS. 1 to 3
which reproduce different turning positions of the axis of rotation
10 (slightly to the right, slightly to the left, central), this
stipulation in particular in contrast to the aforesaid DE 74 30 111
U1 makes it possible for both support elements 7, 8 to be actuated
with a single axis of rotation 10.
[0028] It is further provided that both support elements 7, 8 are
each displaceably connected to a guide 11 (preferably) at their
other ends (in FIGS. 1 to 4 to the right in the diagram) in order
to achieve a vertical movement of the material sliders 4, 5. These
guides 11 for the support elements 7, 8 are disposed on a common
axis of rotation 12, wherein it is particularly preferably provided
that the guides 11 for the support elements 7, 8 are disposed on
mutually opposite sides of the axis of rotation 12 since in
particular compared with DE 74 30 111 U1 this leads to a solution
which is easier to produce from the production technology viewpoint
and specifically in particular when the guides 11 are configured to
be slit-shaped and guide elements 20 disposed on the support
elements 7, 8 are displaceably mounted in these.
[0029] The basic functioning mode of the sewing machine according
to the invention is already obtained from DE 74 30 111 U1 so that
reference is made to this in this respect: the oscillating rotary
movement of the axes of rotation 10 and 12 has the result that the
material sliders 4, 5 move both horizontally and vertically and
thereby transport the material in the feed direction, where the
presser foot 2 serves as a counterholder and fixing for the sewing
process with the sewing needle 17. Thanks to the intermeshing
material sliders 4, 5 extending before and after the axis 1 of the
presser foot 2, the material is optimally supported at each
transporting time point, i.e. an undesired fall of the folds during
sewing is effectively prevented.
REFERENCE LIST
[0030] 1 Axis [0031] 2 Presser foot [0032] 3 Contact area [0033] 4
Material slider [0034] 5 Material slider [0035] 6 Row of teeth
[0036] 6.1 Long row of teeth [0037] 6.2 Short row of teeth [0038]
6.3 Broad row of teeth [0039] 6.4 Narrow row of teeth [0040] 7
Support element [0041] 8 Support element [0042] 9 Crank [0043] 10
Axis of rotation [0044] 11 Guide [0045] 12 Axis of rotation [0046]
13 Feed region [0047] 14 Removal region [0048] 15 Contact region
[0049] 16 Through opening [0050] 17 Sewing needle [0051] 18 Support
plate [0052] 19 Support plate [0053] 20 Guide element
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