U.S. patent application number 14/358318 was filed with the patent office on 2014-10-30 for nub pattern connector system.
The applicant listed for this patent is Andreas Koehler. Invention is credited to Andreas Koehler.
Application Number | 20140322480 14/358318 |
Document ID | / |
Family ID | 45471590 |
Filed Date | 2014-10-30 |
United States Patent
Application |
20140322480 |
Kind Code |
A1 |
Koehler; Andreas |
October 30, 2014 |
NUB PATTERN CONNECTOR SYSTEM
Abstract
A nub-pattern or stud-pattern connecting system has at least two
like connecting elements with structured surfaces which have a
stud-like formation on one or both sides. The studs make a
self-adjusting, form-fitting connection between the connecting
elements of the stud-pattern connecting system when the connecting
elements are pushed together.
Inventors: |
Koehler; Andreas;
(Sangerhausen, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Koehler; Andreas |
Sangerhausen |
|
DE |
|
|
Family ID: |
45471590 |
Appl. No.: |
14/358318 |
Filed: |
November 14, 2012 |
PCT Filed: |
November 14, 2012 |
PCT NO: |
PCT/EP2012/004725 |
371 Date: |
May 15, 2014 |
Current U.S.
Class: |
428/99 ; 264/319;
264/328.1 |
Current CPC
Class: |
A44B 17/0023 20130101;
A44B 18/0003 20130101; F16B 5/07 20130101; A44B 17/007 20130101;
A44B 17/0058 20130101; A44B 18/0084 20130101; Y10T 428/24008
20150115; A44B 17/0076 20130101 |
Class at
Publication: |
428/99 ;
264/328.1; 264/319 |
International
Class: |
A44B 17/00 20060101
A44B017/00 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 15, 2011 |
DE |
202011107861.6 |
Claims
1-40. (canceled)
41. A nub grid connector system, comprising: at least two
corresponding connecting elements with surfaces that have a nubbed
structure formed with a plurality of nubs on one or both sides
thereof; said nubs being configured, upon being pressed together,
to lock into a self-aligning, form-fitting connection between said
connecting elements; said nubs being threefold or fourfold
segmented bodies of rotation and having at least an apex, conical
sliding surfaces, and an undercut; said nubs being disposed in
rectangular or hexagonal grids at defined distances causing said
nubs of the respective said connecting elements to interlock and
become wedged or jammed into one another upon being joined, with
individual said nubs merging geometrically in a lower part
thereof.
42. The nub grid connector system according to claim 41, wherein
said threefold or fourfold segmented bodies of rotation are formed
as a polygon beginning at the apex of each said segmented body,
running at an angle a from the apex by a length A down to a right
to form a first said sliding surface, then continuing at an angle
11 by a length B downward left, to the left, or upward left, to
form said undercut, and finally running at an angle a by a length A
down to the right to form a second said sliding surface.
43. The nub grid connector system according to claim 41, wherein a
surface of said threefold segmented bodies of rotation is created
by vertical rotation and simultaneous duplication about a vertical
axis through a point of origin of a polygon by 360.degree. in three
angular steps of 120.degree. each, where each new polygon formed in
the process is joined to a respectively preceding polygon by
geometric extrusion to create a two-dimensional structure, and
edges of an upper portion of said threefold segmented bodies of
rotation, formed of a first/upper sliding surface and said
undercut, are trimmed radially symmetrically to cause this part of
said nubs to assume a hexagonal shape when viewed from above.
44. The nub grid connector system according to claim 41, wherein a
surface of said fourfold segmented bodies of rotation is created by
vertical rotation and simultaneous duplication about a vertical
axis through a point of origin of a polygon by 360.degree. in four
angular steps of 90.degree. each, where each new polygon formed in
the process is joined to a respectively preceding polygon by
geometric extrusion to create a two-dimensional structure, and the
edges of an upper portion of said fourfold segmented bodies of
rotation, formed of a first/upper sliding surface and said
undercut, are trimmed radially symmetrically to cause this part of
said nubs to assume an octagonal shape when viewed from above.
45. The nub grid connector system according to claim 41, wherein
said connecting element is configured with a two-sided
functionality with said connecting element having a nubbed
structure on an upper face and on a lower face, wherein said nubbed
structure of said upper face that is composed of threefold or
fourfold segmented bodies of rotation, is duplicated vertically
downward with an original surface and a duplicate thereof being
kept at a distance at any point, and a solid is geometrically
extruded between the two surfaces, designed in such a way that a
horizontal section through the mass center of said connecting
element will invariably lead to a continuous triangular or
rectangular grid, and said bottom face is formed analogously of
said upper face, and wherein said bottom face and said upper face
constituting separate joining surfaces.
46. The nub grid connector system according to claim 41, wherein
said connecting elements are formed with two-sided functionality
and said undercuts of said nubs are fashioned through bent-open
straps in continuous sliding surfaces.
47. The nub grid connector system according to claim 41, wherein
said connecting elements are formed, upon being connected, to
establish a positive locking form-fit with permanently closing and
inseparable connection.
48. The nub grid connector system according to claim 41, wherein
said connecting elements are formed, upon being connected, to
establish a positive locking form-fit with a separable
connection.
49. The nub grid connector system according to claim 41, wherein
said nubs are formed with homogeneously structured engaging
surfaces which, upon being connected, are in full contact with each
other across areas of contact, and wherein cavities are formed in
between the respective engaging surfaces that are aligned to the
grid, spatially segregated, and isolated from one another.
50. The nub grid connector system according to claim 41, wherein
said homogeneously structured surfaces have air outlets formed
therein.
51. The nub grid connector system according to claim 50, wherein
said air outlets are located near the foot of said engaging
nubs.
52. The nub grid connector system according to claim 41, wherein
said connecting elements are manufactured from materials having a
sufficient dimensional stability and resilience and the material is
chosen in accordance with requirements of a respective
application.
53. The nub grid connector system according to claim 52, wherein
said connecting elements are manufactured from mutually different
materials.
54. The nub grid connector system according to claim 52, wherein
said materials of said connecting elements are selected from the
group consisting of hard plastic, soft plastic, synthetic foam,
rubber, silicone, neoprene, metals and textile materials,
homogeneously or as composites.
55. The nub grid connector system according to claim 54, wherein
said connecting elements are composites formed with a basic body
carrying a textile cover.
56. A method for producing a connector system, the method
comprising: providing a grid connector system having at least two
structurally corresponding connecting elements with surfaces having
a nubbed structure with nubs on one or both sides thereof, and
wherein the nubs, when the connecting elements are pressed
together, lock into a self-aligning, form-fitting connection;
engineering the nubs as threefold or fourfold segmented bodies of
rotation each having an apex, conical sliding surfaces, and an
undercut; arranging the nubs in rectangular or hexagonal grids at
such distances that the nubs of the respective connecting elements,
when being joined to one another, interlock and become wedged or
jammed, and forming the individual nubs with a lower part merging
geometrically.
57. The nub grid connector system according to claim 41, configured
as a fastening element for sheet metal and hard plastics, as a
system to attach tools to tool trays, as a connection element for
pieces of apparel, as a connection element for medical applications
and applications that are subject to increased hygiene
standards.
58. The nub grid connector system according to claim 41, configured
as a fastening element in tape form.
59. The nub grid connector system according to claim 41, configured
as a fastening element weatherproof clothing and shoes.
Description
[0001] The invention is a connector system that serves as an
alternative to the universal Velcro systems.
[0002] The principle of the Velcro fastener essentially consists of
hooks, which can take a variety of shapes (hook, harpoon, T or
mushroom) and are attached to a surface which in turn forms part of
a textile surface, locking to a superficial loop fabric.
[0003] Forms that feature mushroom-shaped elements are also capable
of locking not only to loop fabrics but also to surfaces bearing
identical structures.
[0004] A special variant is the METAKLETT system, which consists of
steel straps mounting a hook system that interlocks with an eyelet
strip.
[0005] The standard systems have at least the following
disadvantages:
[0006] The delicate hook systems tend to catch fluff, textile
fibres etc., which are difficult to remove and do impair the
adhesive characteristics.
[0007] Especially in the field of medical applications, this
creates hygiene problems as the fluff cannot be eliminated even
through washing.
[0008] The well-known hook system will not only lock to the
intended counterpart but also to other pieces of textile.
[0009] This makes its use rather bothersome and leads to the
gradual deterioration of the affected areas.
[0010] The well-known Velcro systems establish an elastic
connection, which in the case of textile fasteners does not present
a disadvantage. However, since Velcro fasteners are also used to
mount abrasive paper to tool trays for example, this will lead to
reduced effectiveness and force transmission in these applications.
This is particularly apparent with finishing sanders.
[0011] When used to attach tools to tool trays, Velcro fasteners
are unreliable since vibrations will cause them to separate
especially when small areas are concerned.
[0012] Velcro fasteners are widely used as joining elements in the
clothing and footwear segment. In this field of application,
however, the fact that the side carrying the loop fabric tends to
become soaked with water and, unlike the otherwise highly
weatherproof material, dries very slowly proves unfavourable.
[0013] Velcro fasteners are not suited for establishing tight
seals. The carrying capacity of Velcro fasteners needs to be
determined empirically because the loop fabric or mushroom-shaped
structures will engage in a random rather than well-defined
manner.
[0014] The number of materials suitable for Velcro systems is quite
limited. Elastic materials such as rubber and silicone are
precluded. With the exception of the METAKLETT system, Velcro
fasteners are made of flammable materials.
[0015] Aside from the METAKLETT system, which is stamped, the tapes
are difficult to manufacture. Injection moulding or pressing
techniques are out of the question.
[0016] In addition, the well-known METAKLETT system requires the
two joining surfaces to be precisely aligned. Simply pressing the
surfaces together without prior exact adjustment, as is the case
with standard Velcro tape, is not possible.
[0017] The METAKLETT system features sharp protruding edges than
may cause personal injury.
[0018] The purpose of the invention is to overcome the
disadvantages of the state of the art and provide a nub grid
connector system for use in different fields of application.
[0019] The characteristics of the invention described in the patent
claim are intended to address these problems.
[0020] This solution is based on a nub grid connector system with
characteristics as outlined in claim 1.
[0021] Essential features of the invention are that the nubs are
moulded as bodies of rotation or as threefold or fourfold segmented
bodies of rotation and that the bodies of rotation have at least an
apex, conical sliding surfaces and undercuts, and are arranged in a
rectangular or hexagonal grid at a distance so as to allow the nubs
of the parts to be joined to become jammed or snagged in the
connecting process.
[0022] For this purpose, two surfaces are provided, impressed, or
fabricated using other means, with a nubbed or waffle-like texture
on one or both sides. When two such elements are pressed together,
the structures will lock with each other and become capable of
transmitting forces both vertically and horizontally. The
connection can be undone by pulling the elements apart, thus
warping the material. This means that the inventive connector
system can handle tasks, in some cases even better, which have been
left preferably to various types of Velcro fasteners until now.
[0023] The system is based on the two-dimensional arrangement of
slightly undercut bodies of rotation arranged in a rectangular or
hexagonal grid. This gives rise to a waffle-like base body with
nub-shaped elevations that will interlock in a form-fit manner when
two such elements are pressed together.
[0024] For the purpose of the invention, the term "waffle-shaped"
or "waffle-like" designates a structure reminiscent of the surface
of a traditional waffle iron with a regular two-dimensional array
of hollow triangular or quadrangular pyramids without floor area 14
but identical dimensions, where all base edges 14.3 of a pyramid
pointing upwards 14.1 are connected to one base edge 14.3 of three
of our downward-pointing 14.2 pyramids, and at the corners 14.4 are
connected to one corner of the base 14.4 of three or four
upward-pointing 14.1 pyramids (FIGS. 61/62.)
[0025] Contrary to the METAKLETT system for example, this geometry
lets the parts self-align when interlocking.
[0026] In contrast to similar connector systems, there is no need
for a heteromorphic counterpart, as is the case with Velcro tape
and loop tape or lug tape and eyelet tape.
[0027] Dependent claims 2 to 30 describe other beneficial
properties of the invention according to claim 1, however without
restricting them in any way.
[0028] The bodies of rotation vary in shape from rounded to
sharp-edged, subject to the specific requirements. FIG. 1 shows the
range of basic forms. The bodies of rotation are created from the
basic form by segmenting, again depending on the requirements,
either as a pure body of rotation 2.8 (FIGS. 2 to 4), in a
threefold manner 2.9 (FIGS. 5 to 10) or in a fourfold manner 2.10
(FIGS. 11 to 13).As depicted in FIGS. 7, 10 and 13, the upper part
2.5 of the segmented basic bodies 2.9 and 2.10 is trimmed into a
hexagonal or octagonal shape 2.7.
[0029] Giving rise to the following basic forms:
[0030] FIGS. 14 to 19:
[0031] A nub-shaped basic form "A", to be arranged in a rectangular
or 10 hexagonal grid, which is particularly well-suited for
manufacturing elastic connection elements made of rubbery
materials. The edge-free surface allows for easy cleaning.
[0032] FIGS. 20 to 26:
[0033] A basic form "B" structured along angles of 60.degree., to
be arranged in a hexagonal grid.
[0034] By modifying the angles (FIGS. 20, 21), it can be adapted to
different requirements of force transmission. The force needed to
establish or separate the connection can thus be adjusted, as can
the interlocking force of the nubs. Increasing the angle a, for
instance, will lead to a higher separating force. If the angle is
greater than 90.degree., the connection will be permanent (FIG.
20). On the other hand, the greater the angle .beta., the easier it
is to establish the connection. A rounding-off 7 of the edge at the
origin of angle a will diminish the forces required to establish
and separate the connection, providing for outstanding adaptability
to material characteristics and fields of application.
[0035] Horizontal forces 6 are either transmitted vertically to the
load-deflecting surface or will cause the connection to wedge (FIG.
44).
[0036] FIGS. 27 to 32:
[0037] A basic form "C" structured along angles of less than
90.degree., to be arranged in a hexagonal grid.
[0038] Unlike the basic form depicted in FIGS. 20 to 26, this form
allows horizontal forces 6 to be transmitted vertically to the
force-transmitting surfaces without interruption (FIG. 46).
[0039] Basic form "A" is summarized in FIGS. 33 and 34, basic form
"B" in FIGS. 35 and 36, and examples of basic form "C" are given in
an isometric representation in FIGS. 37 and 38.
[0040] FIG. 39 shows the nubbed surface derived from basic form
"A", FIG. 40 from basic form "B", and FIG. 31 from basic form "C",
each in top view.
[0041] FIGS. 42, 43 (basic form "A), FIGS. 44, 45 (basic form "B"),
and FIGS. 46, 47 (basic form "C") show horizontal sections of the
connections. The fitted part 4.3 is shown cross-hatched. The double
arrows represent the incoming horizontal forces 6, while the
thinner arrows show the distribution of forces for the "A" and "B"
variants.
[0042] As is clear from the sectional representations, the
connection is tight although there are cavities 8 capable of
accommodating displaced air and particulate matter, thus allowing
two elements to be connected tightly with the help of the
invention.
[0043] A connection filling the entire space in between the two
elements could only be established by working against the
resistance of the air being squeezed out completely.
[0044] For the purpose of the invention, the term "tight"
designates, in particular, the closed state of the connection in
which the connecting surfaces are in contact with each other,
forming a closed contour and thus a seal.
[0045] Depending on the application, nubbed mats may be provided
with apertures permitting the air 12 to escape (FIG. 40).
[0046] Likewise, any practical application must take into account
that the connecting surfaces may harbour particulate matter, which
too require cavities to be pushed into when the elements are
pressed together.
[0047] The inventive connector system be designed to have a smooth
underside 4.1/4.2 or with the underside moulded on the analogy of
the upside, i.e. as a connecting face 5.1/5.2 (FIGS. 48 to 72).
[0048] Such a configuration will result in a system made of
homogeneous material which is perfect, amongst other things, for
producing cable retainers, self-adhesive insulating elements,
etc.
[0049] The benefits of the inventive seal (FIGS. 50, 58) and the
capability-enhancing cavities 8 (FIGS. 53, 59) are being maintained
here too.
[0050] Tensile strength of the nub grid tape or nub grid surface is
guaranteed by its geometric structure. Tensile loads are
transmitted via a rectangular grid 13 (FIG. 57) when utilising the
basic form "C", and via a triangular grid 13 (FIG. 66) of extreme
dimensional stability when utilising basic form "B".
[0051] The manufacture of undercut nub types, for instance based on
injection moulding, relies on compressible materials.
[0052] As for applications that depend on other types of material
such as hard plastic or steel sheet, or out of technological
necessity, the inventive geometry as shown in FIGS. 63 to 66, can
be generated using fitted parts 10 (FIG. 65), which must be placed
on the apices 14.1/14.2 (FIGS. 61, 62) of the "waffle-shaped"
undercut-free basic body 14 (FIGS. 61, 62).
[0053] This technique is also suitable for plain-underside
designs.
[0054] The variant for creating the inventive geometry (FIGS. 67 to
72) is especially suited to be made of metal.
[0055] Here, the undercut required for the connection is generated
by bending the stamped straps 11 open. Easily discernible in FIG.
67, the "waffle shape" 14 of the sheet lets the two elements
interlock in a self-adjusting manner. FIG. 68 presents a sectional
view of the interlocking stamped sheet pieces. Depending on the
material thickness and on how far the straps 11 are being bent
open, the two elements latch together via the front side of the
straps 11 (as shown in FIG. 68) or interlock directly.
[0056] In the first case, the connection remains separable while in
the second case it is permanent. FIGS. 69 to 71 show an isometric
view of possible manufacturing steps (section of the surface). In
the first step, the straps 11 are stamped out, followed by the
sheet being pressed into a "waffle shape" 14, and the pre-stamped
straps 11 bent open in the final step.
[0057] In FIG. 72 the straps are shown enlarged.
[0058] The invention is a connector system that stands out by ease
of manufacture and extraordinary flexibility.
[0059] It has some significant advantages over conventional
Velcro-based systems: Unless configured as a permanent connection,
the inventive system is easy to clean thanks to the shallow
undercut. Fluff and other particulate matter cannot be trapped by
the nubbed surface. With respect to variants with significant
undercut for permanent connection, this aspect is not quite as
important since they are expected to be closed only once, meaning
that a potential loss of adhesiveness due to fouling is
irrelevant.
[0060] The fully rounded basic form "A" and flat varieties of the
other two basic forms lend themselves to applications governed by
strict hygiene standards, for example in healthcare.
[0061] Except for the variant as per FIGS. 67 to 72 intended for
sheet metal and hard plastic, and to some degree for the
permanent-connection variant, the inventive joining system is
virtually immune to catching on to other surfaces in an
uncontrolled manner. This helps avoiding damage most notably to
textile surfaces and does away with the bothersome effect of
engaging the wrong surfaces that plagues Velcro fasteners.
[0062] With the right choice of materials, angular configuration of
the geometry, and selection of rectangular vs. hexagonal grids, the
inventive connector system can be adapted to the forces to be
absorbed in such a way that both elastic and rigid connections can
be created.
[0063] This means that, with regard to tools attached to tool
trays, the transmission of forces can be made more efficient in
comparison with conventional Velcro systems. When employing the
inventive system to mount abrasive cloth to a tool tray, which is a
very common task, the grinding material cannot detach from the tray
without destroying most of the joining nubs, and is practically
slippage-free.
[0064] Made of rubber-like or synthetic materials, the inventive
connector system is well suited for use in weather-exposed pieces
of clothing like shoes and weather-proof jackets since it does not
absorb any moisture. In addition, it can be used to establish tight
seals, which is beyond the capabilities of conventional Velcro
fasteners.
[0065] The inventive connector system is clearly definable in terms
of the forces it can absorb.
[0066] Which is especially true with the variant for use with sheet
metal (FIGS. 67 to 72) or types derived from the basic form "C". As
a result, the system may also be used to join load-bearing
components.
[0067] The inventive connector system can be made to any size.
[0068] The inventive connector system can fabricated from a variety
of materials, allowing for characteristics such as inseparability,
resistance to solvents, tensibility, transparency, etc. to be
engineered. The inventive connector system is easy to manufacture
using injection moulding techniques or, in the variant shown in
FIGS. 67 to 72, by stamping out and pressing of homogeneous
materials.
[0069] The inventive connector system does not require a
heteromorphic "counterpart" like the classical Velcro system
(fabric hook-and-loop fastener) or in the METAKLETT system (fabric
hook-and-eyelet fastener).
[0070] Manufactured as "continuous" tape, variants for double-sided
use as shown in FIGS. 48 to 72 can be trimmed to any length and
employed to join cables, piping etc. or for packaging purposes. In
the form of synthetic foam mats, the system can be used in
universal protective mats (impact and shock protection) or
insulating sheets (sound and heat insulation), which are made even
more effective by the air layer trapped between the inner nubs and
the material to be insulated and can be joined at the overlapping
ends without any auxiliary means.
[0071] Using the geometry of the inventive connection, drainage
mats designed to seal buildings can perform the function of a
walkable nubbed sheet while offering the possibility to be tightly
and solidly joined along the edges without the need for additional
aids.
[0072] The METAKLETT system, compared with the classical Velcro
system, has the advantage of being much more robust and resistant
to outside influences. The inventive connector system too has these
properties, for instance in the variant shown in FIGS. 67 to 72.
Moreover, there is no need to accurately align the inventive system
before pressing it together, as the two elements will slide over
the bevels of the "waffle-shaped" basic body until they reach the
locking position.
[0073] The METAKLETT system has numerous protruding sharp edges
which pose a risk of personal injury.
[0074] Being located within "depressions" of the connector system,
the protruding straps of the inventive system (variant as per FIGS.
67 to 72), in contrast, present very little danger of injury. With
the apices being slightly rounded out, safety is improved while
retaining full functionality.
[0075] The inventive connector system can be used for joining both
identical and different materials, which affords benefits e.g. when
mounting a wearing part to a tool tray. The tray can be fitted with
a metal connector and the wearing part with a plastic connector.
This also permits limiting predetermined breaking points to a
single element.
[0076] The inventive connector system can be engineered as
separable and permanent variants. If the nubs have a pronounced
undercut (FIG. 20) or the tongues are bent up more steeply (FIG.
68), the connection, after being established, cannot be undone
without destroying the material.
LIST OF REFERENCE SIGNS
[0077] 1. Polygon [0078] 1.1. Polygon, rounded [0079] 2. Nubs
[0080] 2.1. Apex (including rounded apex) [0081] 2.2. Upper sliding
surface [0082] 2.3. Lower sliding surface [0083] 2.4. Undercut
[0084] 2.5. Upper part of body of rotation [0085] 2.6. Lower part
of body of rotation [0086] 2.7. Edge to be trimmed of the upper nub
element [0087] 2.8. Body of rotation, unsegmented [0088] 2.9. Body
of rotation, threefold segmented [0089] 2.10. Body of rotation,
fourfold segmented [0090] 2.11. Body of rotation, unsegmented,
lower part matched to grid [0091] 2.12. Body of rotation, threefold
segmented, lower part of body of rotation matched to grid [0092]
2.13. Body of rotation, fourfold segmented, lower part of 20 body
of rotation matched to grid [0093] 3. Grid [0094] 3.1. Hexagonal
grid [0095] 3.2. Rectangular grid [0096] 4. Connecting element with
structure on one side [0097] 4.1. Arranged into hexagonal grid
[0098] 4.2. Arranged into rectangular grid [0099] 4.3. Upper part
[0100] 4.4. Lower part [0101] 4.5. Nubs of upper part [0102] 4.6.
Nubs of lower part [0103] 5. Connecting element with structure on
both sides [0104] 5.1. Arranged into hexagonal grid [0105] 5.2.
Arranged into rectangular grid [0106] 5.3. Upper part [0107] 5.4.
Lower part [0108] 5.5. Nubs of upper part [0109] 5.6. Nubs of lower
part [0110] 6. Force transmission vectors [0111] 7. Rounding-off
[0112] 8. Cavity [0113] 9. Contact surface [0114] 10. Fitted part
[0115] 11. Strap [0116] 12. Air outlet [0117] 13. Grid structure of
the horizontally trimmed connecting element [0118] 14.
"Waffle-shaped" structure consisting of hollow pyramidal shapes
which are open to the underside [0119] 14.1. Apex top [0120] 14.2.
Apex bottom [0121] 14.3. Base edge [0122] 14.4. Base angle [0123]
15. Degree of undercut
* * * * *