EP3300620A1 - Device for securing a shoelace bow tie - Google Patents

Abstract

The invention relates to a device (1) for securing a knotted shoelace (21) with at least one groove (32) for inserting the knot (22), the device (1) being formed by the knot (22) and the shoelace (21 ) on a shoe (2) and positionable between the node (22) and the shoe (2). By the device (1) of the laces (21) should be easy to bind and at the same time firmly fixed. The device (1) comprises at least one cushion (3) of a soft and elastic plastic, wherein the cushion (3) has the groove (32) or the contact surface (31) for the lace (21) and for the node (22). having.

Description

The invention relates to a device for securing a knotted shoelace with at least one groove or a contact surface for inserting a knot, wherein the device is fastened by the knot and the shoelace on a shoe and positionable between the knot and the shoe.

It is already a generic device from the GB 2 447 314 A known, which is fastened by a shoe lace on a shoe. This device has a receptacle with a cable brake with two opposing teeth. By the rope brake groove, a space is limited, in which the two lace ends can be knotted, with the laces are clamped in the brake.

From the WO 2008/007855 A1 Another generic device for securing a knotted shoelace is known, which is fastened by a shoelace on a shoe. This includes a receptacle with side holes through which the shoelace ends are guided upwards on the device. Two jaws provided on the receptacle form a groove-shaped cable brake, in which the knot of the shoelace is jammed by corresponding toothing on the jaws.

Means for securing a shoe lace are also described in the relevant prior art, which are not generically attached to the knot of Schürsenkels on a shoe and in which not the node is secured. From the US 1,544,225 A For example, there is known a lace securing means in which the loose knot-extending ends and loops of the lace are fixed in the means fastened separately to the shoe. The means are internally studded with a resilient plastic material for clamping the knot-extending ends and loops. After the citations CH 410 549 A and AU 657 361 B2 the shoelace is not knotted. The ends of the unknotted laces become elastic Frictionally fixed recordings so that this attachment replaces a node. In the citation US 3,276,083 A a mechanism is described in which the ends of the laces are threaded and in which by rotating individual parts of the mechanism to each other the laces frictionally and positively fastened.

The invention has the object of providing a device in such a way and to arrange that the shoelace is knotted as usual and at the same time the node is secured regardless of the thickness and the material properties of the lace before loosening, without mechanically stressing the shoelace more than usual ,

The object is achieved according to the invention in that the device has at least one cushion made of a soft and elastic plastic, wherein the cushion has the groove or the contact surface for the laces and for the node. Here, on the one hand, the soft and elastic property of the plastic and on the other hand, the increased by the property of the plastic slip and static friction to own. Such a cushion has soft and elastic properties such as rubber, which inhibits the relative movement of a shoe lace due to its highly adhesive surface. Unlike rope brakes, it does not matter how thick the shoelace is. The tighter the laces are tied or the more contact pressure is generated by the laces on the cushion, the higher the friction and the lower the relative movement between laces and cushions. Due to the elasticity of the material and the pressure generated between laces and cushions during lacing, the sliding properties of the laces on the cushion are greatly reduced. When lacing the pull on the laces causes the laces with the knot penetrates into the elastic groove, thereby displacing the elastic material of the pad and in the sequence is partially surrounded by the elastic material almost completely. Thereby, a relative movement of the individual, arranged in the groove in the cushion portions of the lace, which form the node, braked to each other, which prevents the release of the node.

The cushion forms a friction surface for the lace and the knot. The cushion is made of a soft and elastic plastic produced by polycondensation, which has a high restoring force, wherein due to a lacing of the knot can be generated pressure from the shoe lace on the cushion in a direction Y on the shoe, the friction surface by the penetration of the shoelace in the pillow is enlarged. The more the shoelace penetrates into the soft and elastic plastic, the more it surrounds the cushion. With the contact pressure, the penetration depth increases. As a result of this, the surface with which the shoelaces and cushions touch becomes larger the deeper the shoelace penetrates into the cushion. In this way, the friction surface and thus the friction between the shoe lace and the pad increases.

It may also be advantageous for this purpose if the device has a dimensionally stable support as a bearing for a one-piece or at least two-piece cushion, wherein the support is arranged in a direction Y under the pillow and the cushion or the two cushion parts form and / or fabric - And / or non-positively connected to the support. The support stabilizes the respective cushion because the cushion can not deform in the area of the support. At the same time, the possibility is also limited that the pad can expand excessively to the side, since the pad is at least partially attached to the dimensionally stable support. In addition, the cushion is spared by the edition, since it now rests only indirectly on the support on the shoe and so for example when running no longer rubs directly on the shoe.

It is particularly advantageous if a two-part cushion with a groove between the two cushion parts is arranged on the support. In this case, the groove is narrower than the laces or the node, whereby the shoelace and the node is clamped between the two pad parts. The knot and the laces rest on the support, which connects the two cushion parts. In this case, the bottom of the groove formed by a support surface of the support or by an additional portion of the elastic plastic of the cushion or coated with elastic plastic be. For this two-part embodiment, it is particularly advantageous if the cushion is attached to the support. For this purpose, hooks, anchors and grommets or other profiles may be provided on the support on the support, which are poured into the respective pillow. In this case, the groove has a length which corresponds to the entire length of the pad.

It may also be advantageous if the one-piece cushion in the region of the contact surface has a line-shaped recess, wherein the recess has a length corresponding to the entire length of the pad. The depression serves as a positioning aid for a shoe lace.

It is also advantageous if the groove and / or the recess tapers in a direction Y and / or in a direction Z perpendicular to the direction Y, or the groove has different widths in the direction X. Due to the taper, the shoelace is easier to insert from one side into the groove when the groove is chosen to be very narrow to create more pressure on the shoelace. Different widths have the advantage that the shoelace can be clamped differently different.

With respect to the knotting, it is advantageous if a recess is provided in the cushion or between the two parts of the pad which is wider in a direction X than the groove. In the recess, the knot of the lace is placed. Depending on the thickness of the lace, the recess is larger or smaller

With regard to a universal insert for different thickness shoelaces, it is advantageous that the recess has a depth in the direction Y between 5 mm and 14 mm or 9 mm and a width in the direction X between 3 mm and 11 mm or 7 mm and a length in Direction Z between 4 mm and 12 mm or 8 mm. The recess can penetrate in the direction of Y the entire pillow.

In particular, it is advantageous if the plastic for the cushion with an elongation at break up to 400% and / or a Shore D hardness according to DIN ISO standard 7619-1 between 6 and 90 and / or a Shore A hardness to DIN ISO 7619-1 between 25 and 95 is formed and / or the compression modulus of the plastic is greater than 10 ⁸ Pa and / or the transverse contraction according to the DIN standard EN ISO 527-1 is less than 0.7. The Shore hardness D according to standard DIN ISO 7619-1 varies depending on the plastic composition between 6 and 90, in particular between 8 and 29 and preferably in steps of three points starting with the value 8 and ending in the last step with 29. The Shore Hardness A according to standard DIN ISO 7619-1 varies depending on the plastic composition between 25 and 95, in particular between 40 and 80 and preferably in steps of five points each, starting with the value 40 and ending with 80 in the last step.

The pressure of the shoelace can lead to a strong stretch in the area of the plastic by the shoelace rests on the plastic. An elongation at break up to 400% is advantageous in that this property prevents the plastic from breaking at said location. But it may also be advantageous if the plastic has an elongation at break up to 200%. In a further advantageous embodiment, the plastic has an elongation at break up to 300%. In a particularly advantageous embodiment, the plastic has an elongation at break up to 500%.

So that the shoelace can penetrate sufficiently deep into the plastic, this may not be too hard. The deeper the shoelace penetrates into the plastic, the larger the friction surface between the shoelace and the plastic. Furthermore, the plastic must also not be too soft, since the clamping effect is reduced in a softer plastic. For this reason, it is advantageous if the plastic is formed with a Shore D hardness between 5 and 40. It is particularly advantageous if the Shore hardness D of the plastic is between 5 and 30. It is most advantageous if the Shore hardness D of the plastic is between 10 and 40. But it may also be advantageous if the Shore hardness D of the plastic is between 10 and 30.

wobei dp die Druckänderung ist und dV/V die relative Volumenänderung darstellt. Ein Kompressionsmodul größer als 10⁸ Pa ist insofern vorteilhaft. Besonders vorteilhaft kann aber auch ein Kompressionsmodul über 10⁷ Pa sein. Am vorteilhaftesten ist ein Kompressionsmodul über 10⁹ Pa. Am aller vorteilhaftesten ist ein Kompressionsmodul über 10¹⁰ Pa.The strongest possible clamping effect is ensured if the volume of the pad remains as constant as possible under pressure. In this way, the plastic is prevented from counteracting the external pressure by increasing its volume. The compression modulus K of the plastic is defined as $$\mathrm{K}:=-\mathrm{dp}/\left(\mathrm{dV}/\mathrm{V}\right).$$

where dp is the pressure change and dV / V is the relative volume change. A compression modulus greater than 10 ⁸ Pa is advantageous in this respect. However, a compression modulus above 10 ⁷ Pa can also be particularly advantageous. The most advantageous is a compression modulus over 10 ⁹ Pa. Most advantageous is a compression modulus over 10 ¹⁰ Pa.

mit der relativen Höhenänderung des Kissens dh/h und der relativen Längenänderung des Kissens dl/l. Es kann vorteilhaft sein, wenn die Querkontraktion des Kunststoffs kleiner als 0,6 ist. Vorteilhafter ist es, wenn die Querkontraktion des Kunststoffs kleiner als 0,5 ist. Am vorteilhaftesten ist es, wenn die Querkontraktion des Kunststoffs kleiner als 0,4 ist.In order to increase the clamping effect and at the same time the surface between the lace and the pad, it is advantageous if the plastic of the pressure load as possible does not dodge in the orthogonal direction. This is ensured if the transverse contraction q of the plastic is less than 0.7, with the transverse contraction q defined by the equation $$\mathrm{ie}/\mathrm{H}=-\mathrm{q\; dl}/\mathrm{l}$$

with the relative change in height of the pad dh / h and the relative change in length of the pad dl / l. It may be advantageous if the transverse contraction of the plastic is less than 0.6. It is more advantageous if the transverse contraction of the plastic is less than 0.5. It is most advantageous if the transverse contraction of the plastic is less than 0.4.

It may also be advantageous if a hood is provided for the cushion, wherein the hood is attached at least partially medium or direct form, force and / or material fit to the cushion and / or the support in addition to the support. It can be provided that the hood is provided with a cavity corresponding to the shape of the pad and the adhesive pad is at least partially positioned in the cavity, wherein the support at least partially closes the cavity. Through the hood, the pad can the pressure of the shoe lace only within the volume limited by the cavity dodge. This strengthens on the one hand the clamping effect and on the other hand it is additionally ensured that the surface between shoelace and cushion is as large as possible. It is advantageous if the hood has a slot, wherein the slot has a length which corresponds to the entire length of the hood, wherein the groove and the slot extend parallel to each other, so that the shoe lace is inserted through the slot in the groove.

Furthermore, it may be advantageous if a coefficient of static friction between the surface of the lace and the surface of the pad is greater than 0.7 and / or the sliding friction coefficient is greater than 0.3. This is achieved with thermoplastic elastomers.

It may be advantageous if a system consists of a device and a shoelace and / or a transponder and / or a shoe.

Transponders are used, for example, in races to measure the time of the athlete. It is also conceivable, however, to place sensors on or in the device, for example. These can, for example, read data such as step frequency, temperature or humidity and, if necessary, send it to a smartphone or any other receiver that analyzes and displays this data in order to provide the athlete with information.

Figur 1a

eine Prinzipskizze einer Vorrichtung zur Sicherung eines geknoteten Schnürsenkels, die an einem Schuh festgebunden ist;

Figur 1b

eine Schnittansicht eines zweiteiligen Kissens mit verknoteten Schnürsenkeln im Schnitt X-Y;

Figur 1c

eine Schnittansicht eines einteiligen Kissens mit Nut mit verknoteten Schnürsenkeln im Schnitt X-Z;

Figur 1d

ein Ausführungsbeispiel gemäß Figur 1 a ohne Schuh in perspektivischer Ansicht;

Figur 2

eine Schnittansicht eines einteiligen Kissens im Schnitt X-Y.

Further advantages and details of the invention are explained in the patent claims and in the description and illustrated in the figures. It shows:

FIG. 1a

a schematic diagram of a device for securing a knotted shoelace, which is tied to a shoe;

FIG. 1b

a sectional view of a two-piece pad with knotted shoelaces in section XY;

Figure 1c

a sectional view of a one-piece pad with groove with knotted shoelaces in section XZ;

Figure 1d

an embodiment according to FIG. 1 a without shoe in perspective view;

FIG. 2

a sectional view of a one-piece pillow in section XY.

In FIG. 1a is a system consisting of a device 1 and a shoe 2 shown with laces 21, in which the device 1 is fastened by the knot of the lace 21 on the shoe 2. The device 1 has a two-part pad 3, so that a groove 32 is formed between the two pad parts 3. The material of the pad 3 has similar rubbery properties as cured silicone. The cushion 3 is intended to be knotted with the lace 21 on a shoe 2 to fix the knot 22 and the lace 21 and to prevent the loosening of the knot 22.

As in FIG. 1b is shown in more detail, the two cushion parts 3 are arranged side by side on the support 4. The device 1 rests with the support 4 on the shoe 2. The lace 21 penetrates due to the pressure generated during lacing with its node 22 in the groove 32 and rests on the support surface 41 of the support 4. Due to the elasticity of the pad 3, an indicated by arrows back pressure 61 is exerted on the node 22. This creates friction between the outer parts of the lace 21, which form the knot, and the cushion 3.

For attachment of the pad 3, a structure, not shown, may be provided on the support 4, on which the pad 3 is poured and poured. Such structures of the support 4 may consist of hooks, anchors and eyelets, through which a positive connection with the cushion 3 is ensured. Apart from a possible positive fit, the pad 3 is attached by adhesive forces on the support 4, which are generated when laminating the support 4 with the pad 3.

The two-piece pads 3 consist of two in a direction Y orthogonal direction X closely juxtaposed parts. The between the two Cushion 3 formed groove 32 may taper in a particular embodiment in the direction Y to the support 4 out. The length of the groove 32 substantially corresponds to the length of the cushion 3. If the laces 21 in the direction Y completely inserted between the two pads 3, the pressure 6 and thus the sliding and static friction of the pad 3 on the laces 21 maximum. At the same time, the lace 21 rests on the support surface 41 directly on the support 4.

To Figure 1c For example, the device 1 comprises a one-piece pad 3 positioned between the shoe 2 and the knotted lace 21. In contrast to the one-piece pad 3, a connection between the two pad parts in the bottom of the groove 32 is provided, so that the pad 3 is a U-shaped in section X-profile (not shown) having. The advantage over the two-piece pad 3 is that below the lace 21 and below the knot 22, between the pad 4 and the lace 21 also soft and elastic material is present, which fixes the node 22 better. The knot 22 of the lace 21 is clamped together with the lace 21 between the two pad parts 3.

In Figure 1d is the in Fig. 1a shown device 1 shown enlarged. Here is as well Fig. 1c can recognize, in addition to the groove 32 is still a recess 33 provided in the groove 32, in the lacing of the lace 21, the node 22 is incorporated. Through the recess 33 substantially four circumferential side surfaces are formed, which are in contact with the node 22 and the node 22 surrounding parts of the shoe 21. Characterized in that the one-piece pad 3 is also disposed below the node 22, is a fifth surface, namely the bottom of the recess 33, for generating the friction available.

In FIG. 2 an embodiment of a device 1 is shown with a one-piece cushion 3 in a laced state. The pad 3 has, instead of a groove 32, a contact surface 31 for the lace 21. This is the position the laces 21 on the pad 3 variable because the contact surface 31 is not or not significantly different in geometry from the geometry of the rest of the surface of the pad 3 in the region of the contact surface 31. The region of the pad 3 below the lace 21 is shown as well as the support 4 in section XY. Due to a pressure generated during lacing 6 of shoelace 21 on the pad 3 in a direction Y from above, the shoelace 21 penetrates the abutment surface 31 of the pad 3 in the pad 3 or according to the embodiment according to FIGS. 1b to 1d in the groove 32 a. The elastic pad 3 counteracts the deformation by the shoelace. At the same time, the cushion 3 exerts a counter-pressure 61 on the laces 21 and on the knot 22 and clamps the laces 21 and the knot 22 firmly. The resulting sliding and static friction increases with the increase of the pressure generated by the lace 21 pressure. 6

Claims (11)

Device (1) for securing a knotted shoelace (21) with at least one groove (32) or abutment surface (31) for inserting a knot (22), the device (1) being formed by the knot (22) and shoelace (21 ) on a shoe (2) and is positionable between the node (22) and the shoe (2),
characterized,
that the device (1) comprises at least a pad (3) made of a soft and elastic plastic, wherein the pad (3), the groove (32) or the abutment surface (31) for the lace (21) and for the node (22) having. Device (1) according to claim 1,
characterized,
in that the device (1) has a dimensionally stable support (4) as a bearing for a one-piece or at least two-part cushion (3), the support (4) being arranged in a direction Y under the cushion (3) and the cushion (3 ) is positively and / or material and / or non-positively connected to the support (4). Device (1) according to claim 1 or 2,
characterized,
that is disposed on the support (4) a two-part cushion (3) having a groove (32) between the two pad parts (3). Device (1) according to claim 3
characterized,
in that the groove (32) tapers in a direction Y and / or in a direction Z perpendicular to the direction Y, or the groove (32) has different widths in the direction X. Device (1) according to one of the preceding claims,
characterized,
in that a recess (33) which is wider in a direction X than the groove (32) is provided in the cushion (3) or between the two parts of the cushion (3). Device (1) according to claim 5,
characterized,
that the recess (33) has a depth in the direction Y between 5 mm and 14 mm or from 9 mm and a width in the direction X between 3 mm and 11 mm, or of 7 mm and a length in the direction Z between 4 mm and 12 mm or of 8 mm. Device (1) according to one of the preceding claims,
characterized,
that the plastic for the cushion (3) with an elongation at break up to 400% and / or a Shore D hardness according to standard DIN ISO 7619-1 between 6 and 90 and / or a Shore A hardness according to standard DIN ISO 7619-1 between 25 and 95 is formed and / or the compression modulus of the plastic is greater than 10 ⁸ Pa and / or the transverse contraction according to the standard DIN EN ISO 527-1 is less than 0.7. System consisting of a device (1) according to one of the preceding claims and a laces (21) and / or a transponder and / or a shoe (2). A system according to claim 8, wherein a static friction coefficient between the surface of the lace (21) and the surface of the pad (3) is greater than 0.7 and / or the coefficient of sliding friction is greater than 0.3. Use of a device (1) according to one of claims 1 to 7 for the arrangement between a lace (21) and a shoe (2). Device (1) for fastening a shoelace (21) of a shoe (2) tied to a knot (22), the device (1) comprising at least one receptacle (3) and / or a support (4) arranged in one direction Y can be placed between the knot (22) and the shoe (2) on the shoe (2),
characterized,
in that the receptacle (3) has a contact surface (31) for the lace (21) and is formed in the form of a cushion of a soft and elastic plastic produced by polycondensation, which has a high restoring force, due to a lacing of the knot (FIG. 22) producible pressure (6) from the shoelace (21) on the pad (3) in the direction Y, the contact surface (31) by penetration of the shoelace (21) in the pad (3) is increased.

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