EP3108773B1 - Frame element for a clamping frame - Google Patents
Frame element for a clamping frame Download PDFInfo
- Publication number
- EP3108773B1 EP3108773B1 EP16174760.5A EP16174760A EP3108773B1 EP 3108773 B1 EP3108773 B1 EP 3108773B1 EP 16174760 A EP16174760 A EP 16174760A EP 3108773 B1 EP3108773 B1 EP 3108773B1
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- European Patent Office
- Prior art keywords
- fixing
- frame element
- spring
- tensioning
- recess
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
- B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
- B44D3/18—Boards or sheets with surfaces prepared for painting or drawing pictures; Stretching frames for canvases
- B44D3/185—Stretching frames for canvases
Definitions
- the present invention relates to a frame member for a tenter for mounting a sheet material such as a canvas used in art painting.
- a clamping frame for mounting a sheet material such as a canvas is in particular from DE 103 12 637 A1 known.
- a frame member 11 having a fixing recess 81 and a groove 111 is shown.
- the canvas 5 is fixed by means of the insertion part 82 of the support member 91 frictionally engaged in the fixing recess 81 .
- the support member 91 and the chucking part 92 deviate from Fig. 6 also be integrally connected as a single component.
- This unitary component 91, 92 then acts like a spring provided separately from the frame element 11 and presses the canvas 5 into the groove 111.
- a frame element for a clamping frame for clamping a sheet material wherein the frame member has a clamping cavity for clamping the sheet material and a fixing device for fixing the sheet material to the frame member, is from the documents US Pat. No. 3,950,869 and EP 2 248 960 A1 known.
- a frame element for a clamping frame for mounting a sheet material such as a canvas used in art painting, which has a clamping cavity for clamping the sheet material and a fixing device for fixing the sheet material to the frame member.
- the sheet material can be clamped to the fixing device by means of a fixing of a spring provided separately from the frame element.
- the fixing end of the spring interacts with the fixing device in such a way that the fixed sheet material can be prestressed into the clamping hollow space by means of a clamping end of the spring lying opposite the fixing end.
- the fixing device is arranged in the clamping cavity and the clamping cavity is dimensioned such that the spring together with its fixing end and its exciting part is completely receivable in the clamping cavity of the frame member.
- the separate spring is completely received in the clamping cavity of the frame member, it no longer protrudes from the profile of the frame member and therefore can not be touched and solved by careless handling.
- the spring is arranged completely inside the profile of the frame element. It is also advantageous that the frame element according to the invention does not have to have elastic elements or areas, but can be made completely rigid in itself, which simplifies the production of the frame element. The required elasticity is brought by the separate spring which is mounted on the frame element for tensioning the sheet material.
- the frame element according to the invention can be used not only for the production of stenter for the artist's needs, but everywhere, where sheet materials are clamped on frames.
- sheet materials are clamped on frames.
- the use in the context of exhibition construction is conceivable, where often for the production of separation or presentation walls surface materials are mounted on frames.
- the fixing device arranged in the clamping cavity may be, for example, a fixing recess into which the fixing end of the spring can be inserted for fixing the sheet material.
- the fixing recess has an opening through which it opens into the remaining clamping cavity.
- the spring together with its fixing end and its exciting is completely accommodated in the space formed by the fixing recess and the remaining clamping cavity. It is completely inside the frame element and does not stand out from it.
- the fixing recess as a pivot bearing for limited rotatable recording of the fixing of the spring is particularly advantageous.
- a stop or a stop surface is arranged in the fixing recess, whereby the rotational movement of the fixing of the spring is limited in that direction in which the exciting of the spring by rotating the fixing against a clamping direction for clamping the sheet material is movable.
- the abutment surface may protrude into the fixing recess or be formed by an already existing boundary wall of the Fixieraussparung.
- the tensioned sheet material seeks to rotate the spring against the aforementioned tensioning direction around its fixation. Such a rotation is only possible until the fixing end of the stop surface is stopped. From this moment, the spring is bent due to its inherent elasticity by the bias of the sheet material. As soon as the restoring force the spring is in equilibrium with the force exerted by the bias of the sheet material on the spring force, a stable state is achieved and the restoring force generated by the spring keeps the sheet material permanently in tension. It is pulled into the clamping cavity of the frame member.
- the opening of the Fixieraussparung with a clear opening width which is smaller than a width of the fixing of the spring.
- a spring with in the direction of its width elastically formed fixing is then positively locked in the Fixieraussparung.
- the fixing element When inserted into the fixing recess, the fixing element initially tapers to the clear opening width of the opening before it widens again after penetration of the opening.
- a guide surface can be formed on one side of the opening of the fixing recess, against which the flat material can abut in sections.
- the guide surface preferably extends partially within and partially outside the Fixieraussparung.
- the cross section of the fixing recess can take various forms. Depending on which cross-sectional geometry is selected, springs with appropriately adapted geometry of their fixators are used. It is conceivable, for example, that the cross section of the fixing recess substantially has a circular shape, substantially the shape of a 1 ⁇ 4-circular ring or substantially an elongated rectilinear shape. In principle, deviating forms are also conceivable.
- the fixing device as Fixieraussparung it is possible to form the fixing in the context of the present invention as projecting into the clamping cavity fixing projection on which the fixing end of the spring for fixing the sheet material by jamming between the fixing projection and the fixing end can be placed.
- the frame element according to the invention is preferably produced as an extruded aluminum profile strip.
- the comparatively low weight of aluminum means that this material is well suited for tenter frames in the field of art painting.
- the frame element according to the invention can be formed so that four composite frame elements form a clamping frame. If required, two stiffening braces can be used to stabilize the finished tenter frame. The sheet material can then be clamped directly by means of several springs.
- the frame element according to the invention as a tensioning device which can be fastened to a conventional wooden frame, so that four frame elements according to the invention can be fastened on the rear side of a wooden frame which may already be stabilized with two stiffening struts.
- Fig. 1 shows the cross section of a first embodiment of the frame element according to the invention 1. It is an extruded aluminum profile strip, which with its longitudinal direction in the direction of the Fig. 1 extends.
- Four of these frame elements 1 can, as in Fig. 1 of the DE 103 12 637 A1 shown assembled into a finished square or rectangular tenter, which is not shown here.
- the present invention partially illustrated stiffening strut 14 corresponds to one of the two in Fig. 1 of the DE 103 12 637 A1 shown stiffening struts 3 and 4.
- the stiffening strut 14 is preferably also prepared as an extruded aluminum profile strip and engages in a provided on the frame member 1 strut mount 15 a.
- the frame element 1 has a further strut receptacle 16 , which in the concrete in Fig. 1 shown frame element 1 is not needed.
- the strut receptacle 16 is used in two other frame members of the same clamping frame for receiving the reinforcing strut, not shown here, perpendicular to the in Fig. 1 shown stiffening strut 14 extends.
- the frame element 1 has a clamping cavity 2 , which in Fig. 1 is characterized by a dashed line 17 and in the embodiment shown has a substantially rectangular shape.
- the clamping cavity 2 is bounded by the profile walls 18, 19 and 20 and a part of the fixing device 10 .
- On his in Fig. 1 left side of the clamping cavity 2 is open, so that it is accessible from this side.
- a further profile wall 21 is present in extension of the profile wall 18 to the right.
- the left end of the profile wall 18 is provided with a thickening 22 and the right end of the profile wall 21 with a thickening 23 .
- Fig. 1 recognize the thickening 23, the profile wall 21, the profile wall 18 and the thickening 22 of the guide of the sheet material 5 in the form of a canvas, which is represented by a dotted line.
- the clamping cavity 2 In the clamping cavity 2 is a plurality of springs 4, wherein in the cross-sectional view according to Fig. 1 only one spring 4 is shown.
- the spring 4 acts on the screen 5 in the clamping cavity 2 in a clamping direction SR with a clamping force SK. This presses a hook-shaped curved exciting 7 of the spring 4 in the tensioning direction SR against the screen 5.
- the spring 4 is fixed to the fixing device 10 by means of a fixing end 6 opposite the exciting end 7 .
- the fixing device 10 comprises a fixing recess 3 , which is essentially circular in cross-section .
- a section of the screen 5 is first introduced through an opening 9 into the fixing recess 3 .
- the fixing end 6 of the spring 4 is pushed through the opening 9 .
- the free end 24 of the canvas 5 in Fig. 1 are pulled to the left until the exciting 7 of the spring 4 moves against the drawn clamping direction SR.
- the spring 4 is finally stretched and pushes in Fig. 1 essentially from the top left in the tensioning direction SR on the screen 5.
- the screen 5 does not rest against the profile wall 19 , so that the screen 5 is under mechanical tension.
- the screen 5 seeks to move the exciting 7 of the spring 4 against the clamping direction SR.
- This movement of the exciting end 7 would result in a rotational movement of the spring 4 about the fixing end 6 in the counterclockwise direction.
- Such a rotational movement can be in the embodiment shown as a pivot bearing formed Fixieraussparung 3 only to a limited extent.
- the fixing end 6 of the spring 4 is bent in the manner of a hook approximately semicircular.
- a stop surface 8 projects substantially radially into the circular fixing recess 3 .
- a guide surface 11 is arranged on the in Fig. 1 right side of the opening 9, a guide surface 11 is arranged. On this guide surface 11 , the canvas 5 abut in sections, whereby it is led out of the Fixieraussparung 3 . In the embodiment shown, a larger part of the guide surface 11 extends outside of the Fixieraussparung 3 and a smaller part of the guide surface 11 within the Fixieraussparung 3. Exactly on the back of extending within the Fixieraussparung 3 part of the guide surface 11 is the stop surface. 8
- Fig. 1 As in Fig. 1 can be seen, is provided separately from the frame member 1 spring 4 together with its exciting 7 and its fixing end 6 completely in the clamping cavity 2. No component of the spring 4 protrudes in its mounted on the frame member 1 state to the left on the dotted line 17 addition out of the clamping cavity 2 out.
- the risk that one or more of the springs 4 are solved by the handling of a composite of several inventive frame members 1 clamping frame on which a canvas 5 is clamped, is considerably reduced. Elaborate and annoying re-insertion of dissolved springs as in the prior art is therefore unnecessary.
- Fig. 2 shows the same embodiment of the frame member 1 as Fig. 1 , However, a differently shaped spring 4 is used here.
- the largest part of the spring cross-section according to Fig. 2 runs arched. While the fixating 7 of in Fig. 1 the spring shown is curved hook-shaped, that ends Clamping end 7 of the spring 4 according to Fig. 2 without hook-shaped curvature.
- the transition of the spring body in the fixing end 6 takes place in Fig. 2 by means of a transitional edge 25.
- the fixing end 6 is also in Fig. 2 formed approximately with a semicircular cross-section.
- the interaction of in Fig. 2 shown spring 4 with the frame element 1 according to the invention is carried out in the same manner as described above in connection with the Fig. 1 has been described.
- Fig. 3 shows a second embodiment of a cross section of the frame element according to the invention 1. It differs from the embodiment according to the Fig. 1 and 2 by a different design of the fixing device 10.
- the fixing device 10 has in this embodiment a Fixieraussparung 3 with a cross section in the form of a 1 ⁇ 4-circular ring. At opposite boundary walls of the Fixieraussparung 3 barbs 12 are arranged, which engage in the canvas 5 and thereby allow a positive securing the screen 5 in the Fixieraussparung 3 against pulling out.
- the fixing end 6 of the spring 4 according to Fig. 3 is curved more flat than the one in the Fig. 1 and 2 fixing shown in 6 and follows its curvature roughly to the cross-sectional shape of the locating recess 3.
- the end surface 26 acts as the stop surface 8 in Fig. 1 as a stop for limiting the rotational movement of the spring . 4
- the exciting 7 of the spring 4 is slightly bent and the cross section of the spring body is otherwise rectilinear. As in Fig. 3 can be seen, the canvas 5 can thereby lie flat against the spring 4 .
- the basic operation of the embodiment according to Fig. 3 is, moreover, the same as related to Fig. 1 has been described.
- Fig. 4 shows a third embodiment of a cross section of the frame element according to the invention 1. It differs from the embodiments according to the Fig. 1-3 by a different design of the fixing device 10.
- the fixing device 10 is formed here in the form of a Fixieraussparung 3 with an elongated rectilinear cross section having a left undercut region 27 and a right undercut region 28 .
- the cross section of the fixing end 6 of the spring 4 is in the in Fig. 4 embodiment shown formed in the manner of an inverted large T.
- In the tensioned state of the screen 5 is a slight tilting of the T-bridge in the Fixieraussparung 3 such that the in Fig. 4 left portion of the T-bar rests against the lower boundary wall of Fixieraussparung 3 and the in Fig. 4 right portion of the T-bar on the upper boundary wall of the undercut region 28 abuts. This results in a slightly counterclockwise tilted position of the spring . 4
- Fig. 5 shows a fourth embodiment of a cross section of the frame element according to the invention 1. It differs from the embodiments according to the Fig. 1-4 by a different design of the fixing device 10. Instead of a Fixieraussparung as in the embodiments according to the Fig. 1-4 Here, a fixing projection 13 is provided which protrudes from the profile wall 20 at an angle of inclination. The Fixiervorsprung 13 protrudes as a bar out of the profile wall 20 , at its in Fig. 5 upper, free end has a cross-sectionally approximately circular thickening 29 , which serves a not too sharp-edged guide the canvas 5 to the free end of the strip-shaped fixing projection 13 .
- the fixing end 6 of the spring 4 is in Fig. 5 formed in the manner of a negative form of Fixiervorsprungs 13 .
- the fixing end 6 has a spring cavity 30 , with which the fixing end 6 is placed on the fixing projection 13 .
- the clamping of the screen 5 takes place between the fixing projection 13 and the inner wall of the spring cavity 30 in the fixing end 6.
- the spring 4 according to Fig. 5 with the exception of its fixating 6 is similar to that according to Fig. 3 designed.
- the spring body has a straight course, ends in Fig. 5 at the exciting 7 but with a much greater curvature by about 90 °.
- the basic operation of the frame element according to Fig. 5 is the same as her in connection with Fig. 1 was described, with the exception that in Fig. 5 as well as in Fig. 4 no rotational bearing-like functionality of the fixing device 10 is given.
- Fig. 6 shows the cross sections of two inventive frame members 1, each of which the frame element 1 according to Fig. 1 equivalent.
- Fig. 6 shows a cross section of a four frame members according to the invention existing clamping frame, wherein the cross sections of two opposing frame members 1 of the clamping frame with shortened stiffening strut 14 are shown.
- the frame element 1 according to the invention is to be configured as a tensioning device which can be fastened to a conventional wooden frame, then it only needs the fixing device 10, the profile wall 18 with the thickening 22 and the profile walls 19 and 20 (cf. Fig. 1 ).
- the profile wall 21 with the thickening 23 and the strut seats 15 and 16 are not required.
- This clamping device can be attached with its profile wall 19 at the back of the wooden frame.
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Description
Die vorliegende Erfindung betrifft ein Rahmenelement für einen Spannrahmen zum Aufspannen eines flächigen Materials wie beispielsweise einer in der Kunstmalerei verwendeten Leinwand.The present invention relates to a frame member for a tenter for mounting a sheet material such as a canvas used in art painting.
Ein Spannrahmen zum Aufspannen eines flächigen Materials wie einer Leinwand ist insbesondere aus der
Besonders vorteilhaft ist es bei der Variante gemäß
Eine derartige Erleichterung ist beispielsweise bei der in
Bei dem bekannten Spannrahmen gemäß
Ein Rahmenelement für eine Spannrahmen zum Aufspannen eines flächigen Materials, wobei das Rahmenelement einen Spannhohlraum zum Spannen des flächigen Materials und eine Fixiereinrichtung zum Fixieren des flächigen Materials an dem Rahmenelement aufweist, ist aus den Dokumenten
Es ist daher die Aufgabe der vorliegenden Erfindung, ein Rahmenelement für einen Spannrahmen zum Aufspannen eines flächigen Materials wie beispielsweise einer in der Kunstmalerei verwendeten Leinwand zu schaffen, welches gewährleistet, dass unter Beibehaltung der erleichterten Handhabung beim Spannen und Fixieren des flächigen Materials die die Spannung des flächigen Materials bewirkenden und separat von dem Rahmenelement vorgesehenen Federn nicht durch unvorsichtige Handhabung des aus mehreren Rahmenelementen zusammengesetzten Spannrahmens gelöst werden können.It is therefore an object of the present invention to provide a frame member for a clamping frame for mounting a sheet material such as a canvas used in art painting, which ensures that while maintaining the ease of handling when clamping and fixing the sheet material, the voltage of the laminar material causing and provided separately from the frame member springs can not be solved by careless handling of the composite of several frame elements clamping frame.
Diese Aufgabe wird mittels eines Rahmenelements mit den Merkmalen des Anspruchs 1 gelöst. Weitere Ausgestaltungen der vorliegenden Erfindung ergeben sich aus den Unteransprüchen.This object is achieved by means of a frame element with the features of
Erfindungsgemäß wird ein Rahmenelement für einen Spannrahmen zum Aufspannen eines flächigen Materials wie beispielsweise einer in der Kunstmalerei verwendeten Leinwand vorgeschlagen, welches einen Spannhohlraum zum Spannen des flächigen Materials und eine Fixiereinrichtung zum Fixieren des flächigen Materials an dem Rahmenelement aufweist. Dabei ist das flächige Material mittels eines Fixierendes einer separat von dem Rahmenelement vorgesehenen Feder an der Fixiereinrichtung festklemmbar. Das Fixierende der Feder wirkt derart mit der Fixiereinrichtung zusammen, dass das fixierte flächige Material mittels eines dem Fixierende gegenüberliegenden Spannendes der Feder in den Spannhohlraum vorspannbar ist. Die Fixiereinrichtung ist in dem Spannhohlraum angeordnet und der Spannhohlraum ist derart bemessen, dass die Feder samt ihrem Fixierende und ihrem Spannende vollständig in dem Spannhohlraum des Rahmenelements aufnehmbar ist.According to the invention, a frame element is proposed for a clamping frame for mounting a sheet material such as a canvas used in art painting, which has a clamping cavity for clamping the sheet material and a fixing device for fixing the sheet material to the frame member. In this case, the sheet material can be clamped to the fixing device by means of a fixing of a spring provided separately from the frame element. The fixing end of the spring interacts with the fixing device in such a way that the fixed sheet material can be prestressed into the clamping hollow space by means of a clamping end of the spring lying opposite the fixing end. The fixing device is arranged in the clamping cavity and the clamping cavity is dimensioned such that the spring together with its fixing end and its exciting part is completely receivable in the clamping cavity of the frame member.
Dadurch, dass die separate Feder vollständig in dem Spannhohlraum des Rahmenelements aufnehmbar ist, ragt sie nicht mehr aus dem Profil des Rahmenelements heraus und kann daher nicht mehr durch unvorsichtige Handhabung berührt und gelöst werden. Die Feder ist vollständig im Inneren des Profils des Rahmenelements angeordnet. Vorteilhaft ist außerdem, dass das erfindungsgemäße Rahmenelement keine elastischen Elemente oder Bereiche aufweisen muss, sondern in sich vollkommen starr ausgebildet werden kann, was die Herstellung des Rahmenelements vereinfacht. Die erforderliche Elastizität wird von der separaten Feder mitgebracht, die zum Spannen des flächigen Materials an dem Rahmenelement montiert wird.Characterized in that the separate spring is completely received in the clamping cavity of the frame member, it no longer protrudes from the profile of the frame member and therefore can not be touched and solved by careless handling. The spring is arranged completely inside the profile of the frame element. It is also advantageous that the frame element according to the invention does not have to have elastic elements or areas, but can be made completely rigid in itself, which simplifies the production of the frame element. The required elasticity is brought by the separate spring which is mounted on the frame element for tensioning the sheet material.
Das erfindungsgemäße Rahmenelement kann nicht nur zur Herstellung von Spannrahmen für den Künstlerbedarf verwendet werden, sondern überall dort, wo flächige Materialien auf Rahmen aufgespannt werden. Beispielsweise ist insbesondere die Verwendung im Rahmen des Messebaus denkbar, wo häufig zur Herstellung von Trenn- oder Präsentationswänden flächige Materialien auf Rahmen aufgezogen werden.The frame element according to the invention can be used not only for the production of stenter for the artist's needs, but everywhere, where sheet materials are clamped on frames. For example, in particular the use in the context of exhibition construction is conceivable, where often for the production of separation or presentation walls surface materials are mounted on frames.
Bei der in dem Spannhohlraum angeordneten Fixiereinrichtung kann es sich beispielsweise um eine Fixieraussparung handeln, in welche das Fixierende der Feder zum Fixieren des flächigen Materials einsetzbar ist. Dabei weist die Fixieraussparung eine Öffnung auf, durch welche hindurch sie in den verbleibenden Spannhohlraum mündet. Im Falle der Ausbildung der Fixiereinrichtung als Fixieraussparung ist die Feder samt ihrem Fixierende und ihrem Spannende vollständig in dem von der Fixieraussparung und dem verbleibenden Spannhohlraum gebildeten Raum aufnehmbar. Sie befindet sich vollständig innerhalb des Rahmenelements und steht nicht aus diesem hervor.The fixing device arranged in the clamping cavity may be, for example, a fixing recess into which the fixing end of the spring can be inserted for fixing the sheet material. In this case, the fixing recess has an opening through which it opens into the remaining clamping cavity. In the case of the formation of the fixing device as a fixing recess, the spring together with its fixing end and its exciting is completely accommodated in the space formed by the fixing recess and the remaining clamping cavity. It is completely inside the frame element and does not stand out from it.
Besonders vorteilhaft ist es, die Fixieraussparung als Drehlager zur begrenzt drehbaren Aufnahme des Fixierendes der Feder auszubilden. Dabei ist ein Anschlag bzw. eine Anschlagfläche in der Fixieraussparung angeordnet, wodurch die Drehbewegbarkeit des Fixierendes der Feder in derjenigen Drehrichtung begrenzt wird, in welche das Spannende der Feder durch Drehen des Fixierendes entgegen einer Spannrichtung zum Spannen des flächigen Materials bewegbar ist. Die Anschlagfläche kann in die Fixieraussparung hineinragen oder von einer ohnehin vorhandenen Begrenzungswandung der Fixieraussparung gebildet werden.To form the fixing recess as a pivot bearing for limited rotatable recording of the fixing of the spring is particularly advantageous. In this case, a stop or a stop surface is arranged in the fixing recess, whereby the rotational movement of the fixing of the spring is limited in that direction in which the exciting of the spring by rotating the fixing against a clamping direction for clamping the sheet material is movable. The abutment surface may protrude into the fixing recess or be formed by an already existing boundary wall of the Fixieraussparung.
Das gespannte flächige Material trachtet danach, die Feder entgegen der vorgenannten Spannrichtung um ihr Fixierende zu drehen. Eine solche Drehung ist nur solange möglich, bis das Fixierende von der Anschlagfläche gestoppt wird. Ab diesem Moment wird die Feder aufgrund ihrer Eigenelastizität durch die Vorspannung des flächigen Materials gebogen. Sobald sich die Rückstellkraft der Feder im Gleichgewicht mit der von der Vorspannung des flächigen Materials auf die Feder ausgeübten Kraft befindet, ist ein stabiler Zustand erreicht und die von der Feder erzeugte Rückstellkraft hält das flächige Material dauerhaft in Spannung. Dabei wird es in den Spannhohlraum des Rahmenelements hereingezogen.The tensioned sheet material seeks to rotate the spring against the aforementioned tensioning direction around its fixation. Such a rotation is only possible until the fixing end of the stop surface is stopped. From this moment, the spring is bent due to its inherent elasticity by the bias of the sheet material. As soon as the restoring force the spring is in equilibrium with the force exerted by the bias of the sheet material on the spring force, a stable state is achieved and the restoring force generated by the spring keeps the sheet material permanently in tension. It is pulled into the clamping cavity of the frame member.
Vorteilhaft ist es, die Öffnung der Fixieraussparung mit einer lichten Öffnungsweite zu versehen, die kleiner als eine Breite des Fixierendes der Feder ist. Eine Feder mit in Richtung ihrer Breite elastisch ausgebildetem Fixierende ist dann formschlüssig in die Fixieraussparung einrastbar. Beim Einführen in die Fixieraussparung verjüngt sich das Fixierende zunächst auf die lichte Öffnungsweite der Öffnung bevor es sich nach dem Durchdringen der Öffnung wieder aufweitet.It is advantageous to provide the opening of the Fixieraussparung with a clear opening width which is smaller than a width of the fixing of the spring. A spring with in the direction of its width elastically formed fixing is then positively locked in the Fixieraussparung. When inserted into the fixing recess, the fixing element initially tapers to the clear opening width of the opening before it widens again after penetration of the opening.
Zum abschnittsweisen Führen des flächigen Materials von dem Fixierende in Richtung des Spannendes der Feder kann auf einer Seite der Öffnung der Fixieraussparung eine Führungsfläche ausgebildet werden, an welcher das flächige Material abschnittsweise anliegen kann. Dabei verläuft die Führungsfläche vorzugsweise teilweise innerhalb sowie teilweise außerhalb der Fixieraussparung. Hierbei ist es vorteilhaft, die Anschlagfläche zum Begrenzen der Drehbewegbarkeit des Fixierendes der Feder in die Fixieraussparung hineinragen zu lassen und auf der Rückseite des innerhalb der Fixieraussparung verlaufenden Abschnitts der Führungsfläche anzuordnen.For partially guiding the sheet material from the fixing end in the direction of the exciting end of the spring, a guide surface can be formed on one side of the opening of the fixing recess, against which the flat material can abut in sections. In this case, the guide surface preferably extends partially within and partially outside the Fixieraussparung. In this case, it is advantageous to allow the abutment surface to protrude into the fixing recess for limiting the rotational movement of the fixing end of the spring and to arrange it on the rear side of the section of the guide surface extending within the fixing recess.
Die Haltekraft, welche das flächige Material in der Fixieraussparung hält, ergibt sich aus der Haftreibung, die durch die Klemmung des flächigen Materials zwischen dem Fixierende der Feder einerseits und der Innenwandung der Fixieraussparung andererseits bewirkt wird. Um einen zusätzlichen Widerstand des in der Fixieraussparung geklemmten flächigen Materials gegen ein Herausziehen aus der Fixieraussparung zu erzeugen, können an der Innenwand der Fixieraussparung Widerhaken für den Eingriff in das flächige Material angeordnet werden.The holding force which holds the sheet material in the Fixieraussparung, resulting from the static friction, which is caused by the clamping of the sheet material between the fixing end of the spring on the one hand and the inner wall of the Fixieraussparung on the other. In order to generate an additional resistance of the clamped in the Fixieraussparung sheet material against withdrawal from the Fixieraussparung, barbs for engagement in the sheet material can be arranged on the inner wall of the Fixieraussparung.
Der Querschnitt der Fixieraussparung kann verschiedene Formen annehmen. Je nachdem, welche Querschnittsgeometrie gewählt wird, kommen Federn mit entsprechend angepasster Geometrie ihrer Fixierenden zum Einsatz. Denkbar ist beispielsweise, dass der Querschnitt der Fixieraussparung im Wesentlichen eine Kreisform, im Wesentlichen die Form eines ¼-Kreisringes oder im Wesentlichen eine längliche geradlinige Form aufweist. Grundsätzlich denkbar sind auch hiervon abweichende Formen.The cross section of the fixing recess can take various forms. Depending on which cross-sectional geometry is selected, springs with appropriately adapted geometry of their fixators are used. It is conceivable, for example, that the cross section of the fixing recess substantially has a circular shape, substantially the shape of a ¼-circular ring or substantially an elongated rectilinear shape. In principle, deviating forms are also conceivable.
Als Alternative zu der Gestaltung der Fixiereinrichtung als Fixieraussparung besteht die Möglichkeit, die Fixiereinrichtung im Rahmen der vorliegenden Erfindung als in den Spannhohlraum hineinragenden Fixiervorsprung auszubilden, auf welchen das Fixierende der Feder zum Fixieren des flächigen Materials durch Verklemmen zwischen dem Fixiervorsprung und dem Fixierende aufsetzbar ist.As an alternative to the design of the fixing device as Fixieraussparung it is possible to form the fixing in the context of the present invention as projecting into the clamping cavity fixing projection on which the fixing end of the spring for fixing the sheet material by jamming between the fixing projection and the fixing end can be placed.
Das erfindungsgemäße Rahmenelement wird vorzugsweise als stranggepresste Aluminiumprofilleiste hergestellt. Das vergleichsweise geringe Gewicht von Aluminium führt dazu, dass dieses Material für Spannrahmen im Bereich der Kunstmalerei gut geeignet ist.The frame element according to the invention is preferably produced as an extruded aluminum profile strip. The comparatively low weight of aluminum means that this material is well suited for tenter frames in the field of art painting.
Das erfindungsgemäße Rahmenelement kann so ausgebildet werden, dass vier zusammengesetzte Rahmenelemente einen Spannrahmen bilden. Bei Bedarf können zwei Versteifungsstreben zur Stabilisierung des fertigen Spannrahmens verwendet werden. Das flächige Material kann dann mit Hilfe mehrerer Federn unmittelbar aufgespannt werden.The frame element according to the invention can be formed so that four composite frame elements form a clamping frame. If required, two stiffening braces can be used to stabilize the finished tenter frame. The sheet material can then be clamped directly by means of several springs.
Denkbar ist jedoch auch, das erfindungsgemäße Rahmenelement als an einem herkömmlichen Holzrahmen befestigbare Spanneinrichtung auszugestalten, so dass vier erfindungsgemäße Rahmenelemente auf der Rückseite eines ggf. bereits mit zwei Versteifungsstreben stabilisierten Holzrahmens befestigt werden können.It is also conceivable, however, to design the frame element according to the invention as a tensioning device which can be fastened to a conventional wooden frame, so that four frame elements according to the invention can be fastened on the rear side of a wooden frame which may already be stabilized with two stiffening struts.
Nachfolgend werden mehrere Ausführungsbeispiele des erfindungsgemäßen Rahmenelements in Kombination mit verschiedenen Federn beispielhaft anhand der beigefügten Zeichnungen beschrieben. Es zeigen:
- Fig. 1:
- einen Querschnitt eines ersten Ausführungsbeispiels des erfindungsgemäßen Rahmenelements mit einer ersten Feder und einer Versteifungsstrebe,
- Fig. 2:
- das in
Fig. 1 gezeigte Ausführungsbeispiel des erfindungsgemäßen Rahmenelements mit einer zweiten Feder und einer Versteifungsstrebe, - Fig. 3:
- einen Querschnitt eines zweiten Ausführungsbeispiels des erfindungsgemäßen Rahmenelements mit einer dritten Feder,
- Fig. 4:
- einen Querschnitt eines dritten Ausführungsbeispiels des erfindungsgemäßen Rahmenelements mit einer vierten Feder,
- Fig. 5:
- einen Querschnitt eines vierten Ausführungsbeispiels des erfindungsgemäßen Rahmenelements mit einer fünften Feder, und
- Fig. 6:
- zwei in einem fertigen Spannrahmen gegenüberliegend verlaufende Rahmenelemente gemäß dem Ausführungsbeispiel in
Fig. 1 mit jeweils der ersten Feder und zwischen ihnen angeordneter Versteifungsstrebe.
- Fig. 1 :
- a cross-section of a first embodiment of the frame member according to the invention with a first spring and a stiffening strut,
- Fig. 2 :
- this in
Fig. 1 shown embodiment of the frame element according to the invention with a second spring and a stiffening strut, - 3 :
- a cross section of a second embodiment of the frame member according to the invention with a third spring,
- 4 :
- a cross section of a third embodiment of the frame member according to the invention with a fourth spring,
- Fig. 5 :
- a cross-section of a fourth embodiment of the frame member according to the invention with a fifth spring, and
- Fig. 6 :
- two in a finished clamping frame opposite extending frame members according to the embodiment in
Fig. 1 each with the first spring and between them arranged stiffening strut.
Die in
Das Rahmenelement 1 weist einen Spannhohlraum 2 auf, der in
In Verlängerung der Profilwand 18 nach rechts ist eine weitere Profilwand 21 vorhanden. Das linke Ende der Profilwand 18 ist mit einer Verdickung 22 und das rechte Ende der Profilwand 21 mit einer Verdickung 23 versehen. Wie in
In dem Spannhohlraum 2 befindet sich eine Vielzahl von Federn 4, wobei in der Querschnittsdarstellung gemäß
Die Fixiereinrichtung 10 besteht bei dem gezeigten Ausführungsbeispiel aus einer im Querschnitt im Wesentlichen kreisförmigen Fixieraussparung 3. Zum Fixieren der Leinwand 5 in der Fixieraussparung 3 wird ein Abschnitt der Leinwand 5 zunächst durch eine Öffnung 9 in die Fixieraussparung 3 eingebracht. Dann wird das Fixierende 6 der Feder 4 durch die Öffnung 9 gedrückt. Anschließend kann das freie Ende 24 der Leinwand 5 in
In ihrem gespannten Zustand trachtet die Leinwand 5 danach, das Spannende 7 der Feder 4 entgegen der Spannrichtung SR zu bewegen. Diese Bewegung des Spannendes 7 hätte eine Drehbewegung der Feder 4 um das Fixierende 6 im Gegenuhrzeigersinn zur Folge. Eine solche Drehbewegung lässt die bei dem gezeigten Ausführungsbeispiel als Drehlager ausgebildete Fixieraussparung 3 nur in begrenztem Umfang zu.In its tensioned state, the
Wie in
Bei dem gezeigten Ausführungsbeispiel ist auf der in
Wie in
Das Fixierende 6 der Feder 4 gemäß
Das Spannende 7 der Feder 4 ist geringfügig gebogen und der Querschnitt des Federkörpers verläuft im Übrigen geradlinig. Wie in
Der Querschnitt des Fixierendes 6 der Feder 4 ist bei dem in
Abweichend von den Ausführungsbeispielen gemäß der
Im Vergleich zu der in
Das Fixierende 6 der Feder 4 ist in
Die Feder 4 gemäß
Wenn das erfindungsgemäße Rahmenelement 1 als an einem herkömmlichen Holzrahmen befestigbare Spanneinrichtung ausgestaltet werden soll, so braucht sie lediglich die Fixiereinrichtung 10, die Profilwand 18 mit der Verdickung 22 sowie die Profilwände 19 und 20 auf (vgl.
Claims (13)
- Frame element (1) for a tensioning frame for stretching a planar material (5), the frame element (1) having a tensioning cavity (2) for tensioning the planar material (5) and a fixing device (10) for fixing the planar material (5) to the frame element (1), it being possible to clamp the planar material (5) between a fixing end (6) of a spring (4) and the fixing device (10) by means of the fixing end (6), and the fixing end (6) cooperating with the fixing device (10) such that the fixed planar material (5) can be pretensioned into the tensioning cavity (2) by means of a tensioning end (7) of the spring (4) that is opposite the fixing end (6), characterised in that the fixing device (10) is arranged in the tensioning cavity (2) and the tensioning cavity (2) is dimensioned such that the spring (4), together with the fixing end (6) and the tensioning end (7) thereof, can be completely received in the tensioning cavity (2).
- Frame element (1) according to claim 1, characterised in that the fixing device (10) has a fixing recess (3), in which the fixing end (6) of the spring (4) can be inserted in order to fix the planar material (5), the fixing recess (3) having an opening (9) through which the fixing recess (3) opens into the remaining tensioning cavity (2), and it being possible to completely receive the spring (4), together with the fixing end (6) and the tensioning end (7) thereof, in the space which is defined by the fixing recess (3) and the remaining tensioning cavity (2).
- Frame element (1) according to claim 2, characterised in that the fixing recess (3) is designed as a pivot bearing for rotatably receiving the fixing end (6), and a stop surface (8, 26) is arranged in the fixing recess (3), which stop surface limits the rotational movability of the fixing end (6) in the direction of rotation in which the tensioning end (7) can be moved by rotating the fixing end (6) counter to a tensioning direction (SR).
- Frame element (1) according to either claim 2 or claim 3, characterised in that the opening (9) has an inner opening diameter which is smaller than a width of the fixing end (6), such that a resilient fixing end (6) can be engaged into the fixing recess (3).
- Frame element (1) according to any of claims 2 to 4, characterised in that a guide surface (11) is arranged on one side of the opening (9), which surface guides the planar material (5) through the opening (9) in portions.
- Frame element (1) according to claim 5, characterised in that the guide surface (11) extends partially within and partially outside of the fixing recess (3).
- Frame element (1) according to claim 6 in conjunction with claim 3, characterised in that the stop surface (8) is positioned on the rear face of the portion of the guide surface (11) that extends within the fixing recess (3).
- Frame element (1) according to any of claims 2 to 7, characterised in that barbs (12) for engaging in the planar material (5) are arranged in the fixing recess (3).
- Frame element (1) according to any of claims 2 to 8, characterised in that the fixing recess (3) has a substantially circular cross section.
- Frame element (1) according to any of claims 2 to 8, characterised in that the cross section of the fixing recess (3) is substantially in the shape of a ¼ ring.
- Frame element (1) according to any of claims 2 to 8, characterised in that the fixing recess (3) has a substantially elongate rectilinear cross section.
- Frame element (1) according to claim 1, characterised in that the fixing device (10) has a fixing projection (13) which projects into the tensioning cavity (2), on which projection the fixing end (6) of the spring (4) can be placed in order to fix the planar material (5).
- Frame element (1) according to any of the preceding claims, characterised in that it is designed as an extruded aluminium profile strip.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015110176.9A DE102015110176A1 (en) | 2015-06-24 | 2015-06-24 | Frame element for a clamping frame |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3108773A1 EP3108773A1 (en) | 2016-12-28 |
EP3108773B1 true EP3108773B1 (en) | 2019-11-20 |
Family
ID=56134205
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16174760.5A Active EP3108773B1 (en) | 2015-06-24 | 2016-06-16 | Frame element for a clamping frame |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3108773B1 (en) |
DE (1) | DE102015110176A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4403374A1 (en) * | 2023-01-18 | 2024-07-24 | Ki Bum Kim | Canvas fixing device for aluminum canvas frame |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US12077013B2 (en) | 2018-10-12 | 2024-09-03 | Clicart Inc. | Frame for receiving and applying tension to a canvas and method |
CN115320286A (en) * | 2022-06-30 | 2022-11-11 | 常州纺织服装职业技术学院 | Soaking device for filigree drawing board |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3950869A (en) * | 1975-07-30 | 1976-04-20 | John Jacob Samarin | Stretcher frame |
DE10312637B8 (en) | 2003-03-21 | 2008-10-16 | Hamit Cordan | Combination and clamping device for clamping a sheet material |
TW200600366A (en) * | 2004-06-24 | 2006-01-01 | Hsiang-Chuan Liu | Nail needless interchangeable canvas frame |
US20090217557A1 (en) * | 2008-03-03 | 2009-09-03 | Duane Serrano | Artistic media stretcher |
ES2403602T3 (en) * | 2009-05-04 | 2013-05-20 | Iaso, S.A. | Device for tensioning an element, for example a plastic sheet or a textile material, panel with said device and assembly procedure |
AT13019U1 (en) * | 2012-04-13 | 2013-04-15 | Stefan Riegelnik | tenter |
-
2015
- 2015-06-24 DE DE102015110176.9A patent/DE102015110176A1/en not_active Ceased
-
2016
- 2016-06-16 EP EP16174760.5A patent/EP3108773B1/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4403374A1 (en) * | 2023-01-18 | 2024-07-24 | Ki Bum Kim | Canvas fixing device for aluminum canvas frame |
Also Published As
Publication number | Publication date |
---|---|
DE102015110176A1 (en) | 2016-12-29 |
EP3108773A1 (en) | 2016-12-28 |
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