DE102019110874A1 - Shoe last, having at least one first last part, in particular a last front part and at least one second last part, in particular a last rear part - Google Patents

Abstract

Shoe last (1), comprising at least one first last part (2), in particular a last front part, and at least one second last part (3), in particular a last rear part, the first and second last part (2, 3) being movable relative to one another between a first position (4) and a second position (5) are displaceable, wherein the first and / or the second strip part (2, 3) is / are manufactured at least in sections in an additive manufacturing process.

Description

The invention relates to a shoe last, comprising at least one first last part, in particular a last front part, and at least one second last part, in particular a last rear part, the first and second last parts being movable relative to one another between a first position and a second position.

Corresponding shoe lasts are basically known from the prior art. The shoe last is a molded piece made of wood, for example, which is modeled on the shape and contour of a foot and is used to build a shoe. Before the start of series production of a shoe, the shoe last is made in a first step using two-dimensional wooden molds. It is known to construct the shoe last in two parts, the two shoe last parts being able to be converted into an extended and a bent position via a common pivot mechanism. In the extended position or in the working position of the shoe last is used to z. B. the shoe upper - also known shaft - to give its final shape. The shape of the shoe last can influence the fit and the aesthetic impression of the shoe.

The invention is based on the object of specifying a shoe last which, in particular with regard to a simple, quick and inexpensive measure, has a positive influence on the production of a shoe last, in particular enables it to be produced economically.

The object is achieved by a shoe last having at least one first last part, in particular a front last part, and at least one second last part, in particular a rear last part, according to claim 1. The dependent claims relate to possible embodiments of the shoe last.

The invention relates to a shoe last, comprising at least one first last part, in particular a last front part, and at least one second last part, in particular a last rear part, the first and second last parts being movable relative to one another between a first position and a second position. The shoe last is characterized in that the first and / or the second last part is or are manufactured at least in sections in an additive manufacturing process. The production in particular of at least two last parts of the shoe last that are movable with respect to one another by an additive manufacturing process allows the two last parts to be produced economically, i.e. h to keep the manufacturing costs low, since in particular the assembly of the multi-part shoe last is unnecessary. In the first position, the at least two last parts of the shoe last can have a greater extension of the shoe last than in the second position, in which the at least two last parts are in a different relative position and / or orientation compared to the first position. The first position can represent a working position of the shoe last, this first position allows the target shape or desired shape and / or target geometry of the shoe to be produced by means of the shoe last and in particular of the shoe upper to be reproduced by the at least two last parts. In this first position or in the working position, the shoe last can be lined, d. H. z. B. that in this first position the shaft and / or the insole is mounted and / or molded on the shoe last. In contrast, the common shape or the common geometry or shape of the at least two last parts in the second position differs therefrom, here the shape of the shoe last formed by the at least two last parts can have a curved or a more strongly curved and / or a shorter length of the last have than this has in the first position. The second position of the at least two strip parts can also be referred to as the insertion and / or removal position. I.e. z. B. that the shoe last in the second position of the at least two guide parts and thus in the insertion and / or removal position has a shape that allows the shoe last to be removed from an inner region of a shoe manufactured or manufactured using the shoe last, or at least the To facilitate removal of the shoe last from inside the shoe. In the second position, the introduction or introduction of the temporarily shortened or temporarily curved shoe last into an inner area of an area which will later form a shoe can also be facilitated or made possible in the first place. In other words, in the second position, the shaft can be opened and closed, ie. H. In the second position, the shoe last is introduced into a shaft interior and / or guided out of a shaft interior. The production of at least one last part, in particular several last parts, particularly preferably all last parts of a shoe last, enables an economical and fast production of a shoe last which is preferably adapted to a specific target geometry.

Alternatively or additionally, the additively manufactured first or second last part can be adapted or adaptable to a person's foot in an individually configured process step. For this purpose, a data processing device can be provided which is based on a superimposable representation of the raw data described feet and the last described by last raw data is set up to generate the individually configured last data. The individually configured last data for the generative construction by an additive manufacturing process of at least one last part, in particular of all last parts of the shoe last, can include both ergonomic aspects and aesthetic aspects for the shoe to be formed. Here, a device for manufacturing an individually configured guide can be a data processing device implemented in particular in terms of hardware and / or software which, on the basis of (a) raw foot data that shows the morphology of at least one foot of a wearer of a device to be manufactured or manufactured on the basis of the device Describe individually configured last to be manufactured shoe, as well as of (b) raw last data, which describe the geometrically constructive basic design of at least one preconfigured last and for the generation of individually configured last data, which at least partially adapted to the morphology of the at least one foot described by the raw foot data describe the individually configured last to be manufactured, is set up. The device for manufacturing an individually configured last is at least one manufacturing device which can be or is assigned to the data processing device and which is set up to manufacture an individually configured last on the basis of the individually configured last data. In particular, if the shoe last is manufactured exclusively in an additive manufacturing process or if all the individual parts forming the shoe last are manufactured in an additive manufacturing process, it is possible to produce the shoe last, which may require little or no manual action. It is possible for the first and the second strip part to be manufactured in an additive manufacturing process; in particular, the first and the second strip part are manufactured in a construction job of the additive manufacturing device. This makes it possible that after the removal of unsolidified building material and the removal of the shoe last from a building chamber of the additive manufacturing system, the shoe last is ready for use without further action or requires only a small amount of post-processing. In other words, after it has been removed from the additive manufacturing system and after any unconsolidated building material has been removed, the shoe last can be in a state that is sufficient for the intended use of the shoe last. This means that there is no need for any subsequent processing steps for the shoe last.

The first and the second strip part can be designed in such a way that they can be displaced in the first position in a first pivoting and / or sliding position and in the second position in a second pivoting and / or sliding position. The movement from the first to the second position can thus include a pivoting movement and / or a sliding movement.

The first and second strip parts can be designed or arranged in such a way that they have a greater extent, in particular a greater longitudinal extent, in the first position than in the second position. The variable extension of the shoe last can, for. B. concern the longitudinal length parallel to the main plane of extension of a shoe bottom, the length of the height of a shoe last, the transverse length or the width of the shoe last and / or the maximum or minimum length extension in any plane of the shoe last. The first position of the at least two strip parts, d. H. the position with the larger extension can form a working position of the last, in which a component of the shoe, e.g. B. of the shoe upper on which the shoe last is injected and / or grown and / or processed. The second position, which has a smaller extent, can be used as an insertion and / or removal position in which the shoe last can be removed or removed from an interior of the shoe, in particular from an interior of the shoe upper.

It is possible that the first and / or second strip part produced in an additive manufacturing process is at least partially made of metal and / or plastic and / or ceramic; the first and / or second strip part is preferably made in an additive manufacturing process using a powdery building material, in particular in a binder jetting process and / or in a selective laser sintering process and / or in a selective laser melting process. For example, a metal powder, a plastic powder and / or a ceramic powder (for example a plastic-coated molding sand) can be used as the building material of the additive manufacturing process.

It can prove to be advantageous if the first and the second strip part have at least one mutually assignable or assigned stop area, in particular a stop surface, and a counter-stop area, in particular a counter-stop surface, which are designed to allow the first strip part to move relative to the second strip part, or vice versa to block or limit in at least one direction of movement or degree of freedom of movement. Optionally, the mobility of the two bar parts to each other be blocked in two directions of movement by an assignable or assigned stop area and counter-stop area, i.e., for example, that the movement in a first direction of movement by a first stop area-counter-stop area assignment and a movement of the at least two strip parts in a second direction of movement different from the first Direction of movement can be achieved by a second stop area-counter-stop area assignment. The movement limitation by the first stop area and the first counter-stop area can form an end position of the movement of the at least two bar parts and thus the positioning in the working position or the first position of the at least two bar parts. Thus, through contact of the first stop area with the counterstop area, the worker handling the shoe last can easily perceive reaching the work position by haptic means. The same can optionally or additionally apply to the contact of the second stop area with the second counterstop area, in which case an end position can then be reached in an opposite direction, this end position preferably being the second position of the two strip parts, and thus the insertion and removal position which represents at least two parts of the bar. The contact of the first stop area with the first counterstop area and / or the contact of the second stop area with the second stop area can take place directly or indirectly, preferably the contact occurs through direct contact of sections of the two mutually movably mounted strip parts, in particular through direct contact of sections of the Front part of the groin and the rear part of the groin.

It can prove to be advantageous if an at least partially defined movement of the first strip part relative to the second strip part is guided via a guide device; the guide device preferably comprises a first guide element which interacts with a second guide element. The guide device can be designed such that a guided relative movement of the first and second strip parts from a first end position to a second end position of the movability of the strip parts is made possible. The guide device can act through indirect or through direct contact of the two strip parts that are movable with respect to one another. For example, an intermediate strip part is arranged between the first and the second strip part, the first conductor part being connected to the second strip part exclusively via the intermediate strip part. Here, the first strip part, the second strip part and the intermediate strip part can each have guide elements, which enable a guided movement of at least the first and the second strip part relative to one another. In particular, the intermediate strip part is also mounted movably in relation to the first and the second strip part.

The first and second guide elements of the guide device can be set up, for example, to guide the movement of the first and second strip part, which is defined at least in sections, at least in sections along a linear and / or rotary movement line. For example, the movement line and / or path describing the movement of the first and / or the second strip part can be at least partially circular, parabolic and / or straight.

In order to improve the manageability of the shoe last, it can be expedient to connect the first and the second last part to one another in a captive manner or to design them so that they can be captively connected. Loss protection can be achieved, for example, via guided mobility with stops. As an alternative or in addition, the at least two strip parts can be connected to one another via a, in particular flexible, connecting means. The loss protection is intended to prevent unintentional detachment of a first strip part from a second strip part. The loss protection is preferably also built up during a generative build-up of both strip parts. In other words, the two strip parts are already directly connected to one another by their additive manufacture so that they cannot be lost, in particular are not connected in a non-destructive manner so that they can be detached from one another, so that these strip parts can only perform the predefined mobility.

It is possible to equip the shoe last with a locking device or to bring it into operative connection, which is set up to at least temporarily block the mobility of the first last part to the second last part, preferably the locking device comprises at least one mechanical locking element, in particular a locking mechanism, and / or at least one magnetic locking element, in particular a permanent magnet. In other words, the movability of the at least two strip parts can be prevented or determined at least temporarily via the locking device. A mechanical locking element can comprise, for example, a locking mechanism, in particular a latching mechanism, a bolt, a screw and / or a clamping or tensioning device. A magnetic locking element can, for example, comprise a permanent magnet, preferably indirectly or directly movably mounted. A locking device constructed as a latching mechanism can, for example, have a structure in the manner of a ratchet, ie, for example, that the Locking device can comprise a locking and / or drop pawl. Alternatively or in addition, the locking device can comprise a screw which achieves the temporary movement-inhibiting property through an indirect or direct non-positive and / or positive connection of the at least two strip parts. So can as a clamping means z. B. a force-locking screw can be used.

Furthermore, it can be provided, for example, that the locking device comprises at least a first and a second locking element, which interact in a locking position in such a way that the mobility of the first strip part relative to the second strip part is temporarily blocked or lockable; the first locking element and the second locking element together in a non-locking position in such a way that the mobility of the first strip part relative to the second strip part is released or can be released.

Also preferably at least the first locking element can be linearly and / or rotationally movable at least in sections in or on at least one strip part, in particular at least in sections in the interior of the at least one strip part, and in a first orientation and / or position the movability of the first strip part Lock relative to the second strip part and release the mobility in a second orientation and / or position. This linear and / or rotatable mounting of the first locking element in or on at least one strip part achieves a compact structure.

It is possible for the first locking element to have an engagement element which interacts with a counter element to limit or prevent a relative movement in at least one degree of freedom, in particular an axial movement, of the first locking element relative to the strip part that receives and / or supports the first locking element. The counter element can be formed or arranged or formed on or in the strip part which at least in sections receives and / or supports the first locking element. As a result of the engagement element of the locking element engaging with the counter element of the strip part receiving the locking device, the mobility of the locking device relative to the strip part can be restricted. In particular, the axial mobility of a locking element that is rotatably mounted at least in phases in a strip part is restricted by the contact of the engagement element with the counter-element. I.e. z. B. that an axial movability of the locking element is made possible within predetermined axial end positions, preferably the two axial end positions are chosen such that the locking element is received or mounted on the strip part with a play that allows its rotational movement well. Finally, such an engagement element can be used to secure the locking element movably arranged or mounted in or on a strip part. The locking element can for example be arranged or mounted in a rear part of the shoe last. In an advantageous embodiment, the engagement element is designed as an integral, i.e. H. one-piece, part of the locking element. Alternatively or additionally, the locking element and / or the engagement element can be produced in a generative manufacturing process. In particular, the locking element, the engagement element and the strip part receiving the locking element are produced in a similar generative manufacturing process. Finally, it is possible to use the locking element, the engaging element and the strip part receiving the locking element in the same generative process process, i. H. z. B. to produce in the same construction job. As a result, the locking element, engaging element and the bar part receiving the locking element can already be operatively connected to one another after its generative structure, in particular being movably connected to one another in such a way that only predefined relative movements are enabled and a complete release of the locking element, the engaging element and the bar part receiving the locking element is not possible is made non-destructive. In other words, the locking element can be manufactured generatively together with the locking element receiving strip part, so that after completion of the additive manufacturing process, no assembly of the locking element with the locking element receiving strip part is necessary, since the locking element is already at its destination in or on the receiving it Bar part is arranged or formed or stored. For example, any support structures formed in the course of the generative manufacturing process can be removed when force is first applied to execute a relative movement between the locking element and the strip part receiving the locking element, e.g. B. be broken, so that the intended mobility of the locking element relative to the locking element receiving strip part is then made possible. Alternatively, the locking element can be formed at least in sections from a different material than the strip part receiving it, e.g. B. the locking element can be made at least in sections from metal and the strip part from plastic, in particular in a generative manufacturing process.

The first locking element can be provided with at least one locking element, which is at least partially in operative connection with a counter-locking element, with a first Orientation and / or position of the locking element relative to the counter-locking element, the locking element is not in contact with the counter-locking element and the movability of the first strip part relative to the second strip part is released and, in a second orientation and / or position of the locking element relative to the counter-locking element, it is in contact stand and thereby block the relative mobility of the first and second strip part, the blocking element of the first locking element is preferably constructed in the manner of an eccentric. It is also possible to combine the function of the engagement element, namely the restriction of the mobility of the locking element relative to the strip part receiving the locking element, with the function of the locking element, namely the execution of the temporary blocking of the mobility of the first and second strip part, in one element , ie, for example, that the locking element is designed in such a way that it enables, on the one hand, a form-fitting and / or non-positive locking of the first and second strip part and, in addition, z. B. by one or more stop sections, inhibits or prevents a rotary and / or axial movement of the locking element within the strip part receiving it within predefined movement limits. For example, by means of corresponding stop sections of the locking element and the strip part receiving it, it can be achieved that the locking element can be moved in a predetermined angular range relative to the strip part receiving the locking element. In addition, the axial mobility can also be limited within predetermined movement limits, e.g. B. a provision of a game that enables both good mobility and good removal of unconsolidated building material of a generative manufacturing process. A locking element, in particular designed as an eccentric, can come into operative connection or contact with the counter-locking element in a contact surface oriented parallel and / or perpendicular to the axis of rotation of the locking element rotatably arranged in or on a strip part. The counter-locking element can be arranged or formed in or on a second locking element; in particular, the second locking element is arranged or formed in or on a second strip part which does not receive the locking element. In other words, a contact surface of the second strip part, which does not receive the locking element, forms the counter-locking element, on which at least temporary contact or clamping with the locking element takes place, whereby locking with at least the first strip part receiving the locking element is at least temporarily established or can be produced . It can optionally be provided that the locking device comprises a spring element, so that at least one part of the locking device biases into a state that locks and / or releases the mobility from the front part of the bar to the rear part of the bar. Alternatively or additionally, the movability of the locking element mounted in or on a strip part can be pretensioned in at least one end position, preferably in a position releasing the mobility of the at least two strip parts, via a pretensioning means. The spring element and / or the pretensioning means is preferably manufactured in an additive manufacturing process, in particular in the same construction job within the additive manufacturing process as the locking element and / or the strip part receiving the locking element.

In a further exemplary embodiment, the at least one locking element can comprise an engagement section for manually introducing a force and / or a torque; the engagement section is preferably (a) as a handle for manually introducing a force and / or a torque and / or (b) as Connection area designed for at least temporary engagement of a tool. By introducing a force and / or a torque via the engagement section on the locking element, a movement of the locking element relative to the strip part which receives or supports it can be initiated or executed. A manual handle can be designed, for example, as a preferably star-shaped handle. A connection area for at least temporarily engaging a tool can e.g. B. comprise a positive and / or non-positive connection with a tool. In particular, the connection area can be designed as a Torx counter-element which can be connected to a Torx engaging element of a tool, wherein in the connected state a force and / or torque can be applied by the tool to the locking element. The engagement section can be arranged or formed directly or indirectly on the locking element. The engagement section is preferably built up with the locking element in the course of a generative manufacturing process.

In order to enable easier handling of the shoe last, it can be expedient for at least one last part and / or a locking element to comprise a marking; the marking preferably provides information on at least one physical property of the at least one last part, particularly preferably a first last part a first marking and a second strip part on a second marking, the two markings together providing information on a combination and / or combinability of the at least two strip parts. It can thus be expedient for a front part and a rear part to have a marking, the marking providing information on the interaction of a first one Specifies the front part of the bar with a first rear part, wherein at least two different front part and / or at least two different rear part can be combined. At least one marking, preferably all the markings of at least one or all of the strip parts, can be formed in the course of a generative manufacturing process to form the body carrying the marking (for example, strip part and / or locking device or locking element). The marking can e.g. B. comprise at least one alphanumeric character and / or at least one pictogram.

It is also expedient if at least one strip part produced at least in sections in an additive manufacturing process comprises at least one drainage opening which connects at least one interior space of the corresponding strip part with a surface area of the strip part; Manufacturing process, in particular under the influence of gravity, can be removed from the interior. The drainage openings can be designed in such a way that they connect an inner area of a last part and / or an intermediate area of a first and a second last part, which can be moved to the first last part in the intended state of the shoe last, with an outer surface or with an outer surface of the shoe last. In this way, non-solidified, in particular powder-like building material can be removed from the inner area or from the intermediate area through the drainage openings of the shoe last after the building process. In addition, it can be provided, for example, to use at least one drain opening also as a feed-through opening for at least temporarily passing a tool from outside into an inner region of a strip part in order to apply a force to a component arranged inside the strip part by means of the tool, e.g. B. to achieve the mobility of this component relative to the strip part forming the feed-through channel.

If at least a sub-area of a strip part is produced from a generative manufacturing process, this offers the possibility that this sub-area is individually configured in a generative one, i. H. z. For example, the building data on which the generative manufacturing process is based (e.g. component geometry, process parameters and / or building material information) are used to produce a shoe last or at least a partial area of a corresponding last part that is individually adapted to a person's foot. It can be provided, for example, that the at least two mutually movable strip parts can be moved with a certain amount of play, the play being selected so generously that unconsolidated building material that is located in the space between the two strip parts or that is in the space between a locking element and the Locking element receiving strip part is based on the minimum gap set by the game is removable or can trickle out. This minimum gap dimension can exist at least in the non-working position, since in the working position jamming of the two strip parts can be effective. As a result, the strip parts, provided they are manufactured in the same additive manufacturing process, are built up generatively in an orientation that does not form the working position.

In addition to the shoe last, the invention also relates to an arrangement for forming a shoe last described herein, comprising at least one group of shoe last parts consisting of at least two different first last parts and at least one second last part which are assembled or can be assembled to form a shoe last composed of a first and a second last part are, the group of shoe last parts preferably comprises (a) at least two different last front parts and at least one last rear part and / or (b) at least one last front part and at least two different last rear parts. For example, a first, preferably standardized, groin rear part with z. B. can be assembled using a generative manufacturing process custom-made bar front parts.

The invention also relates to a method for producing a shoe last described herein, the shoe last being produced at least in sections using an additive manufacturing method. It can be provided, for example, that at least two components of the shoe last, which are mounted movably relative to one another in the intended state, are manufactured in the same generative manufacturing process or within one construction job. The at least two components can be connected to one another at least during the manufacturing process via a connection or via at least one support means, the connection and / or the support means being removed in a later process step. In this way, in particular, the at least two components of the shoe last can be moved as intended. The connection or at least one support means can comprise at least one predetermined breaking point which can be broken after the construction job at a, preferably predefined, breaking line. The proppant can e.g. B. comprise a connecting element, which is removed from the shoe last, in particular completely, after completion of the construction process of the additive manufacturing system. The connection can be in the intermediate stage, ie before the removal of the The connecting element can be designed to be rigid at least in sections, so that in the intermediate stage there can be a rigid connection between the components of the shoe last that are movable with one another in the intended (final) state.

All advantages, details, designs and / or features of the shoe last according to the invention can be transferred or applied to the arrangement according to the invention for forming a shoe last described herein and the method according to the invention for producing a shoe last described here.

• 1 eine schematische Darstellung eines Schuhleistens in einer zweiten Stellung bzw. in einer Einführ- oder Entnahmestellung gemäß einem Ausführungsbeispiel in der Seitenansicht;
• 2 eine Prinzipdarstellung eines Schuhleistens in einer ersten Stellung bzw. in einer Arbeitsstellung gemäß einem Ausführungsbeispiel in der Seitenansicht;
• 3 eine schematische Schnittdarstellung eines Schuhleistens in einer zweiten Stellung bzw. in einer Einführ- oder Entnahmestellung gemäß 1;
• 4 eine schematische Schnittdarstellung eines Schuhleistens in einer ersten Stellung bzw. in einer Arbeitsstellung gemäß 2;
• 5 eine schematische perspektivische Darstellung eines Schuhleistens in einer zweiten Stellung bzw. in einer Einführ- oder Entnahmestellung gemäß 1;
• 6 eine schematische perspektivische Darstellung eines Schuhleistens in einer ersten Stellung bzw. in einer Arbeitsstellung gemäß 2;
• 7 eine schematische Darstellung eines Schuhleistens in einer zweiten Stellung bzw. in einer Einführ- oder Entnahmestellung gemäß 1 in der Draufsicht;
• 8 eine schematische Darstellung eines Schuhleistens in einer ersten Stellung bzw. in einer Arbeitsstellung gemäß 2 in der Draufsicht;
• 9 eine schematische Darstellung eines Schuhleistens einer weiteren Ausführungsform, wobei die Leistenteile linear gegeneinander beweglich gelagert sind.

The invention is explained in more detail using exemplary embodiments in the drawings. It shows:

• 1 a schematic representation of a shoe last in a second position or in an insertion or removal position according to an embodiment in the side view;
• 2 a schematic representation of a shoe last in a first position or in a working position according to an embodiment in a side view;
• 3 a schematic sectional view of a shoe last in a second position or in an insertion or removal position according to FIG 1 ;
• 4th a schematic sectional view of a shoe last in a first position or in a working position according to FIG 2 ;
• 5 a schematic perspective illustration of a shoe last in a second position or in an insertion or removal position according to FIG 1 ;
• 6 a schematic perspective illustration of a shoe last in a first position or in a working position according to FIG 2 ;
• 7th a schematic representation of a shoe last in a second position or in an insertion or removal position according to FIG 1 in plan view;
• 8th a schematic representation of a shoe last in a first position or in a working position according to FIG 2 in plan view;
• 9 a schematic representation of a shoe last of a further embodiment, wherein the last parts are mounted linearly movable relative to one another.

The figures show a shoe last 1 , of at least two, the shape of the shoe last 1 forming parts of the groin 2 , 3 includes. Here is a first strip part 2 as a front part and a second part 3 designed as a rear part. The first and the second bar part 2 , 3 are movable relative to one another between a first position 4th ( 2 ) and a second position 5 ( 1 ) relocatable, cf. arrow 6 . The first and / or the second strip part 2 , 3 are or is at least partially manufactured in an additive manufacturing process. In the in 1 second position shown 5 is the shoe last 1 in working position, ie in this position or alignment of the two strip parts 2 , 3 becomes the shoe last 1 used as intended for mounting and / or adapting a shoe upper (not shown) and / or an insole (not shown). Alternatively or additionally, one can be in the working position or in the second position 5 located shoe last 1 be used for molding at least one shoe component, in this case the shoe last forms 1 at least in sections a shaping body for z. B. a plastic injection molding process. After the assembly, adaptation and / or shaping action of at least one shoe component in interaction with the shoe last 1 at least partially done or completed, the shoe last 1 by relative movement of the two parts of the bar 2 , 3 be converted into a compact and / or curved position. As an alternative or in addition, the maximum extension and / or the dimensioning and / or the shape of the shoe last can be achieved by the relative movement 1 can be changed in comparison to the working position that the shoe last 1 can be removed or removed at all or more easily from an interior (not shown) of a formed shoe (not shown), in particular from an interior of a shoe upper. In that at least a partial area of at least one strip part 2 , 3 is manufactured in an additive manufacturing process, an individually configured geometric shape of the shoe last can be created in a simple and inexpensive manner 1 take place at least in sections by taking into account a shape of a person's foot determined in a separate process step and thus the shoe last and finally the shoe last using this shoe last 1 manufactured shoe can be adjusted. The first and the second bar part 2 , 3 are in the first position 4th in a first pivot position and in the second position 5 displaced in a second pivot position, the pivoting movement to reach the respective pivot position by rotation about an axis of rotation 7th he follows. This is due to the curved trajectory 15th or a rotary movement, cf. arrow 6 , evident. Alternatively, in addition or as an alternative to the first and second pivoting position, a first and second sliding position (not shown) can be provided in order to move the at least two bar parts 2 , 3 from a first to a second position 4th , 5 to relocate. To achieve a sliding position, the bar parts 2 , 3 along one at least linear movement path in sections (see arrow 6 ' ) moved or pushed. In 9 is exemplary a linear movement of the at least two strip parts 2 , 3 from a first position 4th (Full line) or a working position to a second position 5 (dotted line) or an insertion or removal position. Here it is shown as an example that a second strip part 3 and a, for example stationary, first strip part 2 are mounted or designed to be linearly movable relative to one another, cf. arrow 6 ' .

The first and second part of the groin 2 , 3 are designed or arranged in such a way that they are in the first position 4th a greater extent 8th , especially a greater length 9 than in the second position 5 exhibit. From the 1 and 2 it can be seen that the longitudinal extension 9 in the first position is greater or longer than the longitudinal extent 9 ' in the second position 5 . The first position 4th can thus the working position and the second position 5 form an insertion and / or removal position. The different extension 8th of the shoe last 1 in the two positions 4th , 5 can be on the longitudinal extension 9 , 9 ' on the length of the shoe last 1 put down, ie, for example, on the longitudinal length parallel to the main extension plane of a shoe bottom (not shown), on the length of the height of a shoe last 1 , to the transverse length / width of the shoe last 1 and / or to the maximum longitudinal extent in any plane of the shoe last 1 .

The first and / or second strip part produced in an additive manufacturing process 2 , 3 can be made at least in sections from metal and / or plastic and / or ceramic. In particular, the first and / or second strip part 2 , 3 in an additive manufacturing process using a powdery building material, e.g. B. in a binder jetting process and / or a selective laser sintering process and / or in a selective laser melting process. A shoe last can be made from the additive manufacturing processes mentioned 1 with sufficient strength and / or rigidity for the manufacture of shoes using the shoe last 1 getting produced.

The first and the second bar part 2 , 3 has at least one mutually assignable or assigned stop area 10 , especially the stop surface and the counter stop area 11 , in particular counter-stop surface, which are set up, the mobility of the first strip part 2 relative to the second bar part 3 , or vice versa, to block at least in sections in at least one direction of movement or in at least one degree of freedom of movement. For example, the mobility of the two bar parts 2 , 3 to each other in two directions of movement by a respective assignable or assigned stop area 10 , 10 ' and counter stop area 11 , 11 ' blocked or limited after relative movement along a predefined movement path. In the embodiment shown, there is a first stop area 10 , which at the same time has a first end position of a relative movement in the first position 4th represents on the first bar part 2 and the corresponding counter stop area 11 on the second part of the groin 3 arranged. A second stop on the first strip part forms a further stop 2 arranged or formed stop area 10 ' the one with a second, on the second strip part 3 arranged or formed counter-stop area 11 ' corresponds, the second stop or the second stop area 10 ' and the second counter stop area 11 ' in their contact position a second end position of the relative movement of the first and second strip parts 2 , 3 Are defined. Here, the second end position can be the second position 5 or the insertion and / or removal position of the shoe last 1 or the groin part 2 , 3 form. In the embodiment shown, the stop area is located 10 , 10 ' and counter stop area 11 , 11 ' or the bar front part and the bar rear part in their respective stop positions or end positions in direct contact with one another. Alternatively, the two groin parts can be blocked from movement 2 , 3 and / or the front part of the last and the rear part of the last, indirectly or indirectly via interconnected further components of the shoe last 1 respectively.

A movement of the first strip part that is defined at least in sections 2 relative to the second bar part 3 can have a guide device 12 be guided. Here, the guide device 12 a first and a second guide element 13 , 13 ' , 14th , 14 ' include that work together. The defined, at least in sections via the guide device 12 Guided movement can for example be carried out continuously from a first end position to a second end position. The guide device 12 can for example be designed as a kind of hinge. In the embodiment shown, there are first guide elements 13 , 13 ' on the first part of the groin 2 and corresponding second guide elements 14th , 14 ' on the second part of the groin 3 arranged or formed. Whereby the first guide elements 13 , 13 ' each formed as convex, in particular at least partially circular or circular cylindrical surface areas, which are divided into corresponding, concave, in particular circular or circular cylindrical surface areas of the second strip part 3 at least temporarily rest in contact or be moved along or guided. In the sectional views of 3 and 4th is the guiding device 12 by both at a smaller distance from the axis of rotation 7th arranged or formed at least partially circular or cylindrical guide elements 13 , 14th , as well as at a greater distance from the axis of rotation 7th arranged or formed at least partially circular or cylindrical guide elements 13 ' , 14 ' educated. The at least partially circular and / or circular cylindrical shape can have a circular cylindrical shape, a circular cylinder, but also a recess or a channel with an at least partially circular or circular cylindrical surface contour shape.

The first and second guide elements 13 , 13 ' , 14th , 14 ' can be set up for the movement of the first and second strip parts, which is defined at least in sections 2 , 3 at least in sections along a rotational or curved, in particular circular arc-shaped, movement line 15th respectively. Here, as shown in the figures, the line of movement 15th or the trajectory completely form the shape of an arc.

The first and the second bar part 2 , 3 can preferably be connected or connectable to one another in a captive manner. In the embodiment shown, there is a displacement of the two strip parts 2 , 3 radial to the axis of rotation 7th due to the interlocking of the guide elements 13 , 13 ' , 14th , 14 ' prevented or a mechanical movement inhibition is present. Also are at the axially outer end regions of the shoe last 1 or the second strip part 3 Intervention highlighting 16 which are in radial to the axis of rotation 7th arranged extending towards the direction. This at least one intervention highlighting 16 can also be used as an axial stop or as an axial limitation of an axial one along the axis of rotation 7th occurring relative movement of the first and second bar part 2 , 3 Act. In addition, the at least one intervention can be highlighted 16 as a limiting stop for the rotational mobility of the first and second strip part 2 , 3 Act. Alternatively or - as shown in the figure - in addition, the first strip part 2 a, in particular disk-like and / or at least partially circular cylinder-shaped body 17th have, which in a, in particular a central recess area 18th of the second inguinal part 3 intervenes.

The shoe last 1 can have a locking device 19th which is set up to include a movability of the first strip part 2 relative to the second bar part 3 to lock at least temporarily, preferably comprises the locking device 19th at least one mechanical locking element, in particular a locking mechanism, and / or at least one magnetic locking element, in particular a permanent magnet. The locking device 19th can further include at least a first and a second locking element 20th , 21st include that in a locked position 22nd cooperate in such a way that a mobility of the first strip part 2 relative to the second bar part 3 is temporarily locked or lockable, the first locking element preferably act 20th and the second locking element 21st in a non-locking position 23 together in such a way that the mobility of the first strip part 2 relative to the second bar part 3 can be released or released.

At least the first locking element 20th can be linearly and / or rotatably movable at least in sections in or on at least one strip part 2 , 3 , in particular at least in sections inside the at least one strip part 2 , 3 , be arranged or formed and in a first orientation and / or position the movability of the first strip part 2 relative to the second bar part 3 lock and release the mobility in a second orientation and / or position. The first locking element can move from the first to the second orientation 20th get through a linear and / or rotary movement. The locking element 20th preferably rotatable in the second strip part 3 , especially in the rear part of the groin. The first locking element 20th can in the illustrated embodiment only in the first position 4th or in the working position by engaging the second, on the first strip part 2 locking element designed as a receiving area 21st intervene and consequently the mobility of the first and second strip parts 2 , 3 to each other exclusively in the first position 4th or inhibit or lock in the working position.

The first locking element 20th can be an engagement element 24 have that, in particular positively and / or non-positively, with an on or in which the first locking element 20th at least in sections receiving and / or bearing strip part 2 , 3 (here: the second part of the groin 3 ) formed or arranged counter element (not shown) for limiting or preventing a relative movement in at least one degree of freedom, in particular an axial movement, of the first locking element 20th relative to which the first locking element 20th receiving and / or bearing groin part 3 cooperates or is cooperatively or is operatively connected or operatively connectable. The counter-element can thus by at least temporary contact with the engagement element 24 of the first locking element 20th inhibit or block its mobility in the axial and / or in the rotating direction at least after covering predefined axial or rotational movement paths. This means that the first movable part can be secured against loss in the second strip part 3 mounted locking element 20th can be achieved, as well as the mobility of the first locking element 20th inside the second groin part 3 be kept within specifiable limits.

A locking function of the first locking element 20th to at least temporarily block the mobility of the two strip parts 2 , 3 to each other via a locking element arranged or formed on the first locking element 25th take place, at least in sections with a counter-locking element 26th is in operative connection, wherein in a first orientation and / or position of the locking element 25th relative to the locking counter element 26th the locking element 25th not in contact with the counter-locking element 26th and the mobility of the first part of the groin 2 relative to the second bar part 3 releases and in a second orientation and / or position of the locking element 25th relative to the locking counter element 26th these are in contact and thereby the relative mobility of the first and second strip parts 2 , 3 locks. The locking element is preferably 25th of the first locking element 20th constructed like an eccentric. The locking element 25th is in the illustrated embodiment as a radial projection of the essentially cylindrically shaped first locking element 20th educated. This projection or the locking element 25th can in particular be shaped like a disk and in one as a receiving recess 32 trained locking counter element 26th at least temporarily be recordable. It can be provided that the receiving recess 32 exclusively with a predefined relative position and / or relative orientation of the first and second strip part 2 , 3 to each other in one for receiving the locking element 26th sufficient size and / or shape. It can thus be achieved that the locking function of the locking element 20th to inhibit the relative movement of the first and second strip part 2 , 3 only in the stretched position or in the first position 4th or is present in the working position and in any other relative orientations and / or relative positioning of the two strip parts 2 , 3 an inhibition or blocking of their mobility by the first locking element 20th is not executable. The locking element 25th can include a clamping or non-positive connection component over the course of movement from the open position or non-locking position into the locking position or locking position by providing a sliding slope and / or clamping slope (not shown) on a contact surface. It is thereby achieved that the inhibition of the mobility occurs not only through a positive engagement of the locking element in the locking counter-element, but also a force-locking or a clamping force builds up in the direction of the locking or locking position. This can alternatively or additionally be implemented using a structure in the manner of an eccentric. The principle is advantageous in that, by applying a small amount of force to perform a z. B. Rotational movement of the first locking element 20th or the locking element 25th a high clamping force effect for locking the relative movement can be achieved. The locking counter element 26th can be in or on the second locking element 21st be arranged or formed. The locking counter element 26th can be used as the contact surface of the first strip part 2 , at which an at least temporary contact or a clamping with the locking element 25th and thus a locking with the first locking element 20th receiving second groin part 3 be trained. The locking element is preferably 25th and / or the counter-locking element 26th in one piece, that is to say, for example, of uniform material, as part of the first or second locking element 20th , 21st educated.

As in particular from the 3 , 4th , 7th and 8th can be seen, at least one locking element 20th , 21st , in particular the first locking element 20th , an attack section 27 for manually introducing a force and / or a torque. Preferably, the attack section 27 (a) as a handle (not shown) for the manual introduction of a force and / or a torque and / or as a connection area 28 be designed for at least temporary engagement with a tool (not shown). The attack section 27 can directly on the locking element 20th , 21st be arranged or formed. The connection area 28 can be an example of positive interlocking with a tool z. B. in the form of a training as a Torx counter-element, which can be connected to a Torx tool element (not shown) and, in the connected state, a force and / or torque transmission from the tool to the locking element 20th , 21st made possible.

At least a portion of the locking element 20th , especially its attack section 27 , is preferably arranged or designed in such a way that this area or this attack section 27 is accessible in a state modified with a shoe component (e.g. shoe upper, insole and / or outsole), in particular for the intervention of a tool. It is thus achieved that a braided, multi-part shoe last 1 of one over the locking element 20th , 21st locked state can be converted into a state releasing the mobility of the at least two shoe last parts.

An upper one, even when the shoe last is in a braided state 1 Area of the shoe last open at the top 1 can, for example, be used as a point of attack for an at least temporary fastening of the shoe last 1 on a machine and / or on a holder. Thus it is achieved that the shoe last 1 can be kept defined and thus for an at least partially automated processing and / or for an at least partially manual processing is kept ready in a defined orientation and / or position. For this purpose, the shoe last can be equipped with a lockable connection and / or with a clip connection at the point of application in order to secure and / or simple attachment and detachment of the shoe last 1 on a machine and / or on a holder. The shoe last preferably has 1 at its open area in the braided state, one compared to a further sub-area of the shoe last 1 higher strength and / or stiffness. The increase in the strength and / or rigidity of this shoe last area enables a reduction in the wear and tear there in the event that the shoe last is frequently connected and disconnected 1 with a machine and / or with a holder. The region of the shoe last exhibiting greater strength and / or rigidity can preferably be produced during the additive manufacturing process, with at least one process parameter of the additive manufacturing process being able to be acted upon accordingly. For example, the energy beam selectively introduced into a region of the building material to be consolidated is correspondingly changed or varied in terms of its power per unit area.

At least one part of the groin 2 , 3 and / or at least one locking element 20th , 21st can be a marker 29 include. In the in the 7th and 8th The embodiment shown has the first locking element 20th and that, the locking element 20th receiving second groin part 3 one mark each 29 which gives the worker an indication of the rotational position in which the first locking element is 20th and in which direction of rotation the first locking element 20th is to be moved to change position. Alternatively or additionally, the marking 29 information on at least one physical property of the at least one rail part 2 , 3 , particularly preferably has a first strip part 2 a first marking (not shown) and a second strip part 3 a second marking (not shown), the two markings together providing information on a combination and / or combinability of the at least two strip parts 2 , 3 provide.

The at least one strip part manufactured at least in sections in an additive manufacturing process 2 , 3 can optionally have at least one drainage opening 30th , 30 ' , 30 " , 30 "' comprise an interior space of the corresponding strip part and / or an interior space formed by at least two strip parts 31 or space with a surface area of the strip part 2 , 3 connects. In particular, the at least one drain opening 30th , 30 ' , 30 " , 30 "' be designed such that unconsolidated building material of the additive manufacturing process, in particular under the influence of gravity, from the interior 31 can be removed or via the drain opening 30th , 30 ' , 30 " , 30 "' from an interior 31 of the shoe last 1 removed, e.g. B. trickle out, can.

At least the shoe lasts manufactured at least in sections using an additive manufacturing process 1 or the bar parts 2 , 3 can or can be adapted to a real foot of a person via a corresponding adaptation of the CAD data on which the additive manufacturing process is based. The process of making a shoe last 1 can be designed such that the shoe last shown in the figures 1 a finishing stand of the shoe last 1 forms and in the stage of an intermediate result the area produced in the additive manufacturing process of at least one strip part 2 , 3 requires post-processing. For example, in the course of post-processing, the strip part, which is at least partially additively manufactured 2 , 3 be made passable, freed of unconsolidated building material and / or of connections (not shown) or of support structures, which were built during the additive manufacturing process, at least in sections, i.e., for example, by separating or breaking at predetermined breaking points.

An arrangement for forming a shoe last described herein is possible 1 provide at least one group of strip parts 2 , 3 consisting of at least two different first strip parts 2 and at least one second strip part 3 those for forming one of a first and a second strip part 2 , 3 composite shoe lasts 1 composite or composable. In particular, the group of strip parts can comprise (a) at least two different strip front parts and at least one strip rear part and / or (b) at least one strip front part and at least two different strip rear parts.

List of reference symbols

1

Shoe lasts

2

first groin part

3

second groin part

4th

first position (working position)

5

second position (insertion and removal position)

6th

Arrow (for mobility)

7th

Axis of rotation

8th

Extension of 1

9

Longitudinal extension of 1

10, 10 '

Stop range from 2

11, 11 '

Counter stop area

12

Guide device

13, 13 '

first guide element of 2

14, 14 '

second guide element of 3

15th

Motion line

16

Intervention highlighting

17th

Cylinder section body of 2

18th

Recess area of 3

19th

Locking device

20th

first locking element

21st

second locking element

22nd

Locking position

23

Non-locking position

24

Engaging element of 20th

25th

Blocking element of 20th

26th

Locking counter element

27

Attack section

28

Connection area

29

mark

30, 30 ', 30 ", 30"'

Drain opening

31

inner space

32

Receiving recess

Claims (19)

Shoe last (1), comprising at least one first last part (2), in particular a last front part, and at least one second last part (3), in particular a last rear part, the first and second last part (2, 3) being movable relative to one another between a first position (4) and a second position (5) are displaceable, characterized in that the first and / or the second strip part (2, 3) is / are manufactured at least in sections in an additive manufacturing process. Shoe last (1) Claim 1 , characterized in that the first and the second strip part (2, 3) are designed such that they are in the first position (4) in a first pivoting and / or sliding position and in the second position (5) in a second pivot - and / or sliding position are displaceable. Shoe last (1) Claim 1 or 2 , characterized in that the first and second strip parts (2, 3) are designed or arranged such that they have a greater extent (8), in particular a greater longitudinal extent (9), in the first position (4) than in the second position (5) have. Shoe last (1) according to one of the preceding claims, characterized in that the first and / or second last part (2, 3) produced in an additive manufacturing process is or are produced at least in sections from metal and / or plastic and / or ceramic, is preferred the first and / or second strip part (2, 3) built up in an additive manufacturing process using a powdery building material, in particular in a binder jetting process or a selective laser sintering process. Shoe last (1) according to one of the preceding claims, characterized in that the first and the second last part (2, 3) have at least one mutually assignable or assigned stop area (10, 10 '), in particular stop surface, and counter stop area (11, 11') , in particular counter-stop surface, which are set up to block the mobility of the first strip part (2) relative to the second strip part (3), or vice versa, in at least one direction of movement or degree of freedom of movement, preferably the mobility of the two strip part parts (2, 3) are locked to one another in two directions of movement by an assignable or assigned stop area (10, 10 ') and counter-stop area (11, 11'). Shoe last (1) according to one of the preceding claims, characterized in that an at least partially defined movement of the first last part (2) relative to the second last part (3) is guided via a guide device (12), preferably the guide device (12) comprises a first Guide element (13, 13 ') which interacts with a second guide element (14, 14'). Shoe last (1) Claim 6 , characterized in that the first and second Guide elements (13, 13 ', 14, 14') are set up to guide the at least partially defined movement of the first and second strip parts (2, 3) at least partially along a linear and / or rotational movement line (15). Shoe last (1) according to one of the preceding claims, characterized in that the first and the second last part (2, 3) are connected or can be connected to one another in a captive manner. Shoe last (1) according to one of the preceding claims, characterized by a locking device (19) which is set up to at least temporarily block the mobility of the first last part (2) to the second last part (3), preferably the locking device (19) comprises at least a mechanical locking element, in particular a locking mechanism, and / or at least one magnetic locking element, in particular a permanent magnet. Shoe last (1) Claim 9 , characterized in that the locking device (19) comprises at least a first and a second locking element (20, 21) which interact in a locking position (22) in such a way that the first strip part (2) can be moved relative to the second strip part (3 ) is temporarily locked or lockable, the first locking element (2) and the second locking element (3) preferably work together in a non-locking position (23) in such a way that the first strip part (2) can be moved relative to the second strip part (3) or can be released. Shoe last (1) Claim 10 , characterized in that at least the first locking element (20) is linearly and / or rotatably movable at least in sections in or on at least one strip part (2, 3), in particular at least in sections in the interior of the at least one strip part (2, 3) and in a first orientation and / or position blocks the movability of the first strip part (2) relative to the second strip part (3) and enables the movability in a second orientation and / or position. Shoe last (1) Claim 10 or 11 , characterized in that the first locking element (20) has an engagement element (24) which, in particular positively and / or non-positively, is connected to a strip part (2) which at least partially receives and / or supports the first locking element (20) , 3) designed or arranged counter-element for limiting or preventing a relative movement in at least one degree of freedom, in particular an axial movement, of the first locking element (20) relative to the strip part (3) which receives and / or supports the first locking element (20) interacts or is cooperable . Shoe last (1) according to one of the Claims 10 to 12 , characterized in that the first locking element (20) is provided with a locking element (25) which is at least partially in operative connection with a counter-locking element (26), wherein in a first orientation and / or position of the locking element (25) relative to the Counter-locking element (26) the locking element (25) is not in contact with the counter-locking element (26) and the first strip part (2) can be moved relative to the second strip part (3) and the locking element (26) is in a second orientation and / or position ) relative to the counter-locking element (26) they are in contact and thereby block the relative mobility of the first and second strip parts (2, 3), the locking element (25) of the first locking element (20) is preferably constructed in the manner of an eccentric. Shoe last (1) according to one of the Claims 9 to 13 , characterized in that at least one locking element (20, 21) comprises an engagement section (27) for the manual introduction of a force and / or a torque, the engagement section (27) is preferred - as a handle for the manual introduction of a force and / or a torque and / or - designed as a connection area (28) for at least temporarily bringing a tool into engagement. Shoe last (1) according to one of the preceding claims, characterized in that at least one last part (2, 3) and / or a locking element (20) comprises a marking (29), preferably the marking (29) provides information on at least one physical Property of the at least one strip part (2, 3), particularly preferably a first strip part (2) has a first marking and a second strip part (3) has a second marking, the two markings together providing information on a combination and / or combinability of the provides at least two strip parts (2, 3). Shoe last (1) according to one of the preceding claims, characterized in that the at least one last part (2, 3) produced at least in sections in an additive manufacturing process comprises at least one drainage opening (30, 30 ', 30 ", 30"') which an interior space (31) of the corresponding strip part (2, 3) connects to a surface area of the strip part (2, 3), in particular the at least one drainage opening (30, 30 ', 30 ", 30"') is designed in such a way that unconsolidated building material of the additive manufacturing process, in particular under the influence of gravity, can be removed from the interior (31). Shoe last (1) according to one of the preceding claims, characterized in that at least one last part (2, 3) is configured individually. Arrangement for forming a shoe last (1) according to one of the preceding claims, comprising at least one group of last parts (2, 3) consisting of at least two different first last parts (2) and at least one second last part (3) which are used to form one of a first and shoe lasts (1) composed of a second last part (2, 3) are assembled or can be assembled, preferably the group of last parts (2, 3) - At least two different bar front parts and at least one bar rear part and / or - At least one front part and at least two different rear parts. Method for producing a shoe last (1) according to one of the preceding Claims 1 to 17th wherein the shoe last (1) is manufactured at least in sections in an additive manufacturing process.

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