WO2014135520A1

WO2014135520A1 - Tube connection, support frame having a tube connection, and cardboard tube for forming an insertion tube for a tube connection

Info

Publication number: WO2014135520A1
Application number: PCT/EP2014/054145
Authority: WO
Inventors: Horst Schader
Original assignee: Horst Schader
Priority date: 2013-03-04
Filing date: 2014-03-04
Publication date: 2014-09-12
Also published as: PL2964538T3; ES2637639T3; RS56356B1; EP2964538B1; SI2964538T1; HRP20171160T1; EP2964538A1

Abstract

The invention relates to a tube connection and a support frame having such tube connections, wherein the tube connection has a receiving tube (47) and an insertion tube (48), which are designed as cardboard tubes, wherein the receiving tube and the insertion tube each have a tube cross-section formed by connected fold surfaces, in such a way that the tube cross-sections each form at least two adjacent rectangular tube chambers and the receiving tube has a receiving tube chamber open to a connecting side of the cardboard tube in order to form a receiving groove (46), in which receiving tube chamber the insertion tube is inserted by means of an insertion tube chamber or an axial end segment in order to establish a connection to the receiving tube.

Description

Pipe connection and support frame with a pipe connection and cardboard tube to form an engagement tube for a pipe connection

The present invention relates to a pipe joint comprising a receiving tube and an engaging tube, which are formed as cardboard tubes, which are preferably formed from wound and / or glued multi-ply (recycled) paper, wherein the receiving tube and the engaging tube in each case formed of a contiguous formed Abkantflächen Have tube cross-section, such that the tube cross-sections each form at least two adjacent rectangular tube chambers and the receiving tube to form a receiving groove has an open to a connection side of the cardboard tube receiving tube chamber into which the engaging tube for establishing a connection with the receiving tube with an engaging tube chamber or a axial end portion engages. Moreover, the present invention relates to a support frame with frame corners, which are formed from such pipe joints and a cardboard tube for forming an engagement tube for a pipe joint.

It is already known, supporting frames, which are used in particular for the formation of a container provided with a pallet base, from Assemble cardboard tubes, which are formed from wound and / or glued multi-layer (recycled) paper. For example, WO 201/1 13420 A2 shows a support frame which is composed of cardboard tubes and has frame corners in which an engagement connection is formed between the cardboard tubes.

The present invention has for its object to provide a pipe joint, which is particularly suitable for the production of support frame of a transport packaging, which is easier to manufacture and also characterized by a particularly high strength. To solve this problem, the pipe joint according to the invention has the features of claim 1.

According to the invention, the tube cross-sections are designed such that the tube cross-sections in each case have at least two adjacent rectangular tube chambers which allow the production of an engagement connection between the engagement tube and the receiving tube in a simple manner and with a particularly high stability.

Preferably, to secure the pipe connection a Abkantfläche the receiving tube forming a groove flank of the receiving groove is provided on its inside with a detent web, which is engaged behind by a arranged on an outer side of the tube chamber of the engaging tube locking bar.

Preferably, the latching web is formed from a fold edge of the groove edge forming Abkantfläche the receiving tube and thus particularly stiff. If the receiving groove is formed by an inserted into the receiving chamber U-profile strip to secure the pipe joint, which is provided on inner sides of profile legs, each with a locking web, an even greater stability is possible. If the locking webs are formed by formed on the longitudinal edges of the profile leg envelope edges, the locking webs can be made particularly simple.

Preferably, the locking bar is formed from an angle bar arranged on an edge of the engaging tube chamber.

If the angle bar is designed as a U-profile strip, a particularly effective adaptation to a correspondingly provided with a U-profile strip receiving groove of the receiving tube is possible.

The angle bar may extend perpendicular to the longitudinal axis of the engagement tube and terminate an axial end cross section of the engagement tube or alternatively extend parallel to the longitudinal axis of the engagement tube and be disposed on the engagement tube chamber.

The receiving tube preferably has a pipe cross-section forming the number 6 with abutment surfaces abutting one another at right angles, such that the receiving chamber has a lateral engagement opening for the engagement pipe.

If the engagement tube has a pipe cross-section forming the number 8 with abutting surfaces fitting at right angles, such that an L-shaped connecting cross-section with connecting legs arranged at right angles to one another is formed by engagement of the engagement chamber of the engagement pipe in the receiving chamber of the receiving pipe, a corner joint is formed that is particularly stiff possible.

The support frame according to the invention has the features of claim 12.

The inventively embodied support frame is provided with frame corners, which formed from the pipe connections according to the invention are so that the support frame is characterized by a special connection stiffness and high load capacity.

Preferably, the frame corners are arranged by means of transversely to the longitudinal extent of the pipe connections arranged as cardboard tubes and preferably formed from wound and / or glued multi-layer (recycled) paper cross members.

If, for connecting the transverse struts to the frame corners, the cross struts each engage with an axial connection end in an engagement tube or a receiving tube, a direct connection can be required.

A particularly universal use of the engagement tubes is possible when the cross struts are formed from engaging tubes.

Particularly stable side parts become possible when the transverse struts are connected together to form side parts of the support frame at their longitudinal edges.

If the longitudinal edges of the transverse struts formed by the engaging tubes are connected to each other via arranged at the longitudinal edges of angle strips, the stability can be increased even further.

According to a first alternative, the cardboard tube according to the invention for forming the engagement tube is designed so that longitudinal edges of a carton blank forming a middle web of the numeral 8 structure for abutment against an outer web of the numeral 8 form a pipe cross-section forming the numeral 8 with right-angled abutting surfaces. 8 structure are brought, such that with the longitudinal end edges provided Abkantflächen are arranged flat against each other and at right angles to the outer web.

The cardboard tube according to the invention has, in a second embodiment, for the formation of a pipe cross-section forming the number 8 formed with at right angles to each other abutting Abkantflächen on longitudinal edges of a carton blank formed envelope edges, which are brought to form a central web of the digit-8 structure to rest against an outer web of the digit-8 structure, such that provided with the cover edges Abkantflächen areal against each other and at right angles are arranged to the outer web.

Nachfo lying preferred embodiments of the invention are explained in more detail with reference to the drawings.

Show it:

Fig. 1: a support frame in a first embodiment in isometric view;

Fig. 2 is a plan view of a frame corner of the support frame shown in Figure 1 in isometric view with a receiving tube and an engaging tube ..;

Fig. 3: the receiving tube of the frame corner shown in Figure 2 in an individual view.

FIG. 4 shows the engagement tube of the frame corner shown in FIG. 2 in an individual view; FIG.

FIG. 5: an angle strip arranged on the engagement tube according to the illustration in FIG. 1, in a detail view; FIG.

6 shows a support frame according to a second embodiment in an isometric view;

FIG. 7 shows the support frame shown in FIG. 6 immediately before joining a frame corner; FIG.

8 shows a plan view of a frame corner according to view VIII in FIG. 6; FIG. 9 is a sectional view of a frame corner according to section line IX-IX in FIG. 6; FIG.

10 shows an engagement tube in an isometric view;

FIG. 11: a side part composed of engaging tubes of the supporting frame shown in FIG. 6; FIG.

FIG. 12: a side part composed of engaging tubes and receiving tubes of the supporting frame illustrated in FIG. 6; FIG.

FIG. 13: a sectional part composed of engaging tubes in a further embodiment; FIG.

FIG. 14 shows a side part composed of engaging tubes in a further embodiment; FIG.

Fig. 15: an engagement tube in a further embodiment.

Fig. 1 shows a support frame 10 which is composed of frame corners 1 1 and cross struts 12 and is used for example as a frame structure for a transport container, preferably in the aforementioned case, the support frame 10 shown in FIG. 1 is provided with a pallet base on the the support frame 10 can be arranged and provided with an opposite of the pallet base arranged frame cover. The pallet base and the frame cover can be clamped together, in which case the support frame receives corresponding tensile or lashing forces.

Fig. 2 shows a frame corner 1 1 in a representation in which a formed by a pipe cross-section 13 of an engaging tube 14 and a tube cross-section 15 of a receiving tube 16 connecting cross-section 17 of a frame corner 1 1 forming pipe connection 1 8 is shown.

3 shows the receiving tube 16 in a detail view with the tube cross section 15, which forms a number 6 structure in that a multiplicity of abutment surfaces arranged at right angles to one another and arranged contiguously are arranged in their relative position such that, when viewing the tube cross section 15 is formed in the direction of arrow III of the pipe cross-section 15 analogous to the number 6. In the illustrated embodiment, the tube cross-section 15 has five abutting surfaces 19, 20, 21, 23 and 23 adjoining each other at right angles, wherein the bending surface 23, which forms a central web of the numeral 6 structure, has a connecting web 24 bent at right angles thereto is connected to the Abkantfläche 20, which forms an outer web of the numeral 6 structure. Furthermore, it can be seen that two rectangular tube chambers, namely the tubular chamber 25 in the form of a closed profile and the engagement tube chamber 26 in the form of an open profile, are formed by the number 6 structure. The engagement tube chamber 26 forms a receiving groove, wherein a groove edge forming Abkantfläche 1 9 is provided at its front end with a folded edge to form a locking web 27.

As shown in FIG. 2, the tube cross-section 13 of the engagement tube 14 is formed as a numeral 8 structure with two tubular chambers 28 and 29 adjoining each other as closed rectangular profiles, whereby the tube chamber 29 forms an engagement tube chamber which is inserted into the receiving tube chamber 26 of the receiving tube 16 laterally engages, so that the tube cross section 13 of the engagement tube 14 in combination with the tube cross section 15 of the receiving tube 16 forms the connecting cross section 17. As shown in Fig. 4, the numeral 8 structure of the tube cross section 13 of the engagement tube 14 is formed of a plurality of perpendicular abutting abutment surfaces 30 to 36, which form the two tube chambers 28, 29, wherein longitudinal end edges 30, 3 1 of the surface against each other - The adjacent and mutually parallel Abkantenflächen 33, 36 are arranged to bear against a formed by the right angles to the Abkantflächen 33, 36 Abkantfläche 30 outer web and bear against it. For fixation of the illustrated in Fig. 4 digit 8 structure of the pipe section 1 3, the abutting against each abutting abutment surfaces 33, 36 are glued together, and the longitudinal end edges 37, 38 of the Abkantflächen 33, 36 are connected to the outer web of the numeral 8- Glued structure forming Abkantfläche 30.

As shown in FIG. 2, the engagement tube 14 or the engagement tube chamber of the engagement tube 14 is provided with a locking bar 39, which in the present case is formed from an angle bar 40 arranged on a profile edge of the engagement tube chamber.

The illustrated in Fig. 5 as a single part angle bar is like the engaging tube 14 and the receiving tube 1 6 formed by a relative arrangement of mutually perpendicular Abkantflächen. As is clear from the illustration in Fig. 2, it is possible to produce the illustrated frame corner 13 by inserting the engaging tube 14 into the receiving tube 26 of the receiving tube 1 6, characterized in that the engagement tube 14 is inserted in the longitudinal direction of the receiving tube 16 in this in that the latching web 32 formed from the angle strip 33 of the engagement tube 14 engages behind the latching web 27 of the receiving tube 16. A release of the pipe joint in a direction transverse to the longitudinal direction of the receiving tube 16, however, is not possible.

As is particularly easy to understand due to the illustration in Fig. 4, a manufacture of the engaging tube 14, for example by possible that a provided with a closed rectangular cross-section square or rectangular tube is divided longitudinally and the resulting legs of a U-shaped half pipe to form the figure 8 structure shown in Fig. 4 each twice to form the right angles to each other arranged Abkantflächen 32nd , 33 and 35, 36 are bent over an example defined by perforation edge 36, 37.

Fig. 6 shows in a further embodiment, a support frame 40 which in the case of the present embodiment, two S eitenteile 4 1 and two side parts 42 which are connected in frame corners 43 via pipe connections 44.

As shown in FIG. 7, the frame corners 43 for forming the

Support frame 44 are joined such that the side parts 42 are vertically inserted with arranged at their ends U-profile strips 5 1 in formed at the ends of the side parts 41 receiving grooves 46.

8 shows a frame corner 43 in plan view with a receiving tube 47 into which axial ends 57 (see also FIG. 10) of an engagement tube 48 are inserted.

The receiving tube 47 has a structure basically identical to the receiving tube 16 shown in FIG. 3, with a closed tube chamber 49 and a tube chamber 50 open to form the receiving groove 46 into which a U-profile strip 45 is inserted, with profile legs 52 , 53, which are in each case provided on inner sides with a latching web 54, 55, which are each formed by an envelope edges formed on longitudinal edges of the profile legs, ie folding surfaces 56 which are folded back against the inner sides of the profile legs 52, 53.

As FIG. 8 further shows and, for example, with reference to FIG. 11, it is also possible to retract it, the side part 42 has engagement tubes 48 on, which are provided at their axial ends 57 and at their longitudinal edges 58 with the U-profile strips 5 1. As shown in FIG. 8, the U-profile strip forms 5 1 bar webs 59, 50, which engage behind the locking webs 54, 55 in the receiving groove 46, so that a release of the connection in the longitudinal direction of the engaging tube 48 shown in Fig. 8 is not possible ,

Fig. 9 shows the pipe joint 44 in the region of a side member 42 parallel to the U-profile strip 5 1 aligned engagement tube 48, wherein apart from the fact that here the U-profile strip 5 1 is formed at the longitudinal edge of the engagement tube 48, the engagement conditions as such identical are with the engagement conditions shown in Fig. 8.

FIG. 10 shows the engagement tube 48 in an isometric view, wherein it is clear that, in comparison to the engagement tube 14 shown in FIG. 4, the engagement tube 48 is designed in a matching manner as a number 8 structure. Fig. 9, however, in addition to the mutually parallel Abkantflächen 33, 36, which serve to form a pipe chambers 28, 29 separating the middle web 61, cover edges 62, 63, which are formed by the fact that in addition to the Abkantflächen 33, 36 additional Abkantflächen 64, 65 are provided, which are folded against the Abkantflächen 33, 36. Such formed envelope edges 62, 63 can be produced, for example, characterized in that the carton blank is notched on one side at the intended for forming the cover edges 62, 63 point. The side member 42 shown in Fig. 11 is made in the case of the present embodiment of three mutually parallel engaging tubes 48, the transverse struts 67 and spaced by also mutually parallel and perpendicular to the first engaging tubes 48 oriented spacers 66 are spaced. The spacers 66 are also formed from engaging tubes 48. The side member 41 shown by way of example in FIG. 12 has, like the side part 42, formed of engaging tubes 48 cross struts 67, wherein a connection between the axial ends 57 of the engaging tubes 48 and the closed tube chamber 49 of the receiving tube 47 by insertion of the axial ends 57th in lateral insertion openings 68 of the receiving tubes 47 takes place. In the present case, axial ends of the U-profile strips 5 1 arranged on the longitudinal edges of the engagement tubes 48 rest on the receiving tubes 47.

Fig. 13 shows in a variant of a further S eitenteil 70, which is formed of a plurality of parallel trained engagement tubes 48, which are connected at their longitudinal edges by gluing together. Furthermore, the engagement tubes 48 are each connected at their axial ends 57 j each other via a U-profile strip 5 1.

Fig. 14 shows a side part 71, which is also composed of engaging tubes 48, wherein the engaging tubes 48 in the present case at both longitudinal edges 58, 59 in each case with a U-profile strip 5 1 are provided and the connection of the engaging tubes 48 with each other via a bond the arranged on the longitudinal edges 58, 59 U-profile strips 5 1 takes place. Fig. 15 shows an embodiment of an engaging tube 72 which is composed of a plurality of corrugated strips 73 extending parallel to each other and adhesively bonded together, the corrugated strips 73 being arranged so that tubes formed in the corrugated strips 73 are parallel to each other and thus form a unidirectional tube bundle. At the longitudinal edges of the engagement tube 72 is provided with U-profile strips 5 1, which ensure a secure bond of the corrugated strip 73.

Claims

Patent claims

Pipe connection comprising a receiving tube and an engagement tube, which are designed as cardboard tubes, which are preferably formed from wound and / or glued multi-layer (recycled) paper, the receiving tube and the engagement tube each having a tube cross section formed from coherent folded surfaces, such that that the tube cross sections each form at least two adjacent rectangular tube chambers and the receiving tube has a receiving tube chamber open to a connecting side of the cardboard tube to form a receiving groove, into which the engagement tube engages to establish a connection with the receiving tube with an engagement tube chamber or an axial end section.

Pipe connection according to claim 1,

characterized,

that in order to secure the pipe connection, a folding surface of the receiving pipe, which forms a groove flank of the receiving groove, is provided on its inside with a locking web, which is engaged behind by a locking web arranged on an outside of the pipe chamber of the engagement pipe.

Pipe connection according to claim 2,

characterized,

that the locking web is formed from a folding edge of the folding surface of the receiving tube that forms the groove flank.

Pipe connection according to claim 1,

characterized,

that to secure the pipe connection, the receiving groove is formed by a U-profile strip inserted into the receiving chamber, which is provided with a locking web on the inside of each profile leg.

Pipe connection according to claim 4,

characterized,

that the locking webs are formed by folding edges formed on the longitudinal edges of the profile legs.

6. Pipe connection according to claim 2 or 3,

characterized,

that the locking web is formed from an angle strip arranged on an edge of the engagement tube chamber.

7. Pipe connection according to claim 6,

characterized,

that the angle strip is designed as a U-profile strip.

8. Pipe connection according to claim 7,

characterized,

that the angle strip extends perpendicular to the longitudinal axis of the engagement tube and completes an axial end cross section of the engagement tube.

Pipe connection according to claim 7,

characterized,

that the angle strip extends parallel to the longitudinal axis of the engagement tube and is arranged on the engagement tube chamber.

Pipe connection according to one of the preceding claims, characterized in that

that the receiving tube has a pipe cross section forming the number 6 with folded surfaces that are placed at right angles to one another, such that the receiving chamber has a lateral engagement opening for the engagement tube.

11. Pipe connection according to claim 5,

characterized,

that the engagement tube has a pipe cross section forming the number 8 with folding surfaces that are placed at right angles to one another, such that an L-shaped connection cross section with connecting legs arranged at right angles to one another is formed by the engagement of the engagement chamber of the engagement tube in the receiving chamber of the receiving tube.

12. Support frame, in particular for forming a transport container preferably provided with a pallet base, the support frame having frame corners which are formed from pipe connections according to one or more of claims 1 to 6.

13. Support frame according to claim 7,

characterized,

that the frame corners are connected to one another by means of cross struts arranged transversely to the longitudinal extent of the pipe connections and formed as cardboard tubes and preferably made of wound and / or glued multi-layer (recycled) paper.

14. Support frame according to claim 8,

characterized,

that to connect the cross struts to the frame corners, the cross struts each engage with an axial connecting end in an engagement tube or a receiving tube.

15. Support frame according to claim 13 or 14,

characterized,

that the cross struts are formed from engagement tubes.

16. Support frame according to claim 15,

characterized,

that the cross struts are connected to one another at their longitudinal edges to form side parts of the support frame.

17. Support frame according to claim 16,

characterized,

that the longitudinal edges of the cross struts formed by the engagement tubes are connected to one another via angle strips arranged on the longitudinal edges.

. Cardboard tube, in particular for forming an engagement tube for a pipe connection according to one or more of claims 1 to 17, wherein to form a tube cross section forming the number 8 with folding surfaces that are placed at right angles to one another, longitudinal front edges of a cardboard blank are used to form a central web of the number 8 structure to rest against an outer web of the number 8 structure are brought, such that folding surfaces provided with the longitudinal front edges are arranged flat against each other and at right angles to the outer web. 19. Cardboard tube, in particular for forming an engagement tube for a pipe connection according to one or more of claims 1 to 17, wherein to form a tube cross section forming the number 8 with folding surfaces that are placed at right angles to one another on the longitudinal edges of a cartom blank, fold-over edges are formed to form a central web of the number 8 -Structure is brought to rest against an outer web of the number 8 structure, in such a way that the folding surfaces provided with the folding edges are arranged flat against each other and at right angles to the outer web.