DE102022109321B4 - Adapter for arrangement on a hollow profile, connecting element for connecting to at least one adapter, connecting device with at least one adapter and at least one connecting element and hollow profile assembly with at least one connecting device - Google Patents

Abstract

Adapter (100) for arrangement on a hollow profile (402), comprising the following features: • a base body (102) with a lateral surface (104), a first base body end (106) and a second base body end (108) arranged opposite the first base body end (106). ),• an adapter longitudinal axis (110), which runs centrally through the base body (102) through the first base body end (106) and the second base body end (108), • at least two at the first base body end (106) in the direction of the adapter longitudinal axis (110). Centering lugs (112) aligned parallel to the adapter longitudinal axis (110) and at least one resilient locking hook (114) aligned parallel to the adapter longitudinal axis (110) are arranged, the at least two centering lugs (112) in the direction of the adapter longitudinal axis (110) being longer than the at least one Locking hooks (114) are formed, and at least one locking lug (116) is arranged resiliently on and/or in and/or on the lateral surface (104), and connecting element (200) for connection to at least one adapter (100), connecting device (300) with at least one adapter (100) and one connecting element (200), and hollow profile assembly (400) with at least one adapter (100) and / or at least one connecting device (300).

Description

Adapter for arrangement on a hollow profile, connecting element for connecting to at least one adapter, connecting device with at least one adapter and at least one connecting element and hollow profile assembly with at least one connecting device

The invention relates to an adapter for arrangement on a hollow profile, a connecting element for connecting to at least one adapter, a connecting device with at least one adapter and at least one connecting element and a hollow profile assembly with at least one connecting device.

When developing equipment, such as for assembly workstations, hollow profiles are often used in order to be able to model the equipment during the development process, preferably on a 1:1 scale. The hollow profiles used for this are often made of cardboard. The modeling method is accordingly known as “cardboard engineering”. A challenge is often the connection of the hollow profiles that are used for modeling.

A well-known connection technology uses so-called junction plates and expansion connectors. A junction plate is placed over the hollow profiles to be connected. Holes are drilled through the junction plate and the hollow profiles at the connection points. Expansion connectors are then inserted into the holes in order to connect the junction plate with the hollow profiles and thus also the hollow profiles with one another.

The disadvantage of this connection technology is that the connections are very time-consuming to produce. In addition, the junction plates, expansion connectors and hollow profiles are often so badly damaged by making and/or releasing the respective connection that they cannot be used for another connection.

The printed state of the art is also: WO 02/ 044 571 A1 as well as the EP 0 976 339 A1 called.

The invention is therefore based on the object of providing means for connecting hollow profiles which enable a stable and secure connection to be produced quickly and easily, can be used multiple times and is also easy to produce. The invention is also based on the object of providing a hollow profile arrangement that can be produced quickly and easily, can be connected to other components and can be dismantled.

The object is achieved according to the invention by an adapter with the features of patent claim 1, a connecting element with the features of patent claim 16, a connecting device with the features of patent claim 21 and a hollow profile assembly with the features of patent claim 22.

Advantageous refinements and further developments of the invention are specified in the dependent claims.

An adapter for arrangement on a hollow profile comprises a base body with a lateral surface, a first base body end and a second base body end arranged opposite the first base body end. The adapter further comprises an adapter longitudinal axis which runs centrally through the base body through the first base body end and the second base body end, with at least two centering lugs aligned parallel to the adapter longitudinal axis and at least one resilient locking hook aligned parallel to the adapter longitudinal axis being arranged on the first base body end in the direction of the adapter longitudinal axis , and wherein at least one locking lug is arranged resiliently on and/or in and/or on the lateral surface.

The adapter can be inserted into a corresponding connecting element using the at least two centering lugs. The at least one locking hook can serve to lock the adapter in the connecting element, preferably in the direction of the adapter's longitudinal axis. The existence of the at least two centering lugs can make it easier to connect the adapter to the connecting element and improve the stability of the connection, especially against tilting. In order to further facilitate the connection process, the at least two centering lugs can have a centering lug chamfer at their end facing away from the first base body end. In addition, according to the invention, the at least two centering lugs in the direction of the adapter longitudinal axis are designed to be longer than the at least one locking hook. The connection process can be additionally supported in that the at least one locking hook tapers towards its end facing away from the first base body. Because at least two of the centering lugs and at least one of the locking hooks are present, the correct orientation of the adapter when connecting to the connecting element can also be ensured.

The base body can serve to arrange the adapter in a hollow profile in such a way that the adapter longitudinal axis is preferably aligned parallel to a hollow profile longitudinal axis. At the second end of the base body, the adapter can have a chamfer to simplify insertion into the hollow profile. The adapter can be locked in the hollow profile by means of the at least one locking lug. The at least one locking lug, like the at least one locking hook, is designed to be resilient, so that automatic locking of the at least one locking lug and the at least one locking hook is possible. With such locking mechanisms, easily detachable connections can also be realized.

The adapter can, preferably entirely, be made of plastic. As a result, the adapter can have a low weight and be inexpensive to produce. Additionally, an adapter made of plastic can provide the strength and rigidity required for modeling. The adapter is particularly preferably formed in one piece.

The base body is preferably tubular in order to achieve the lowest possible weight while maintaining high rigidity. A tubular base body can also provide spring travel for the at least one locking lug inside the base body.

Preferably, the centering lugs and the at least one locking hook are arranged alternately in the circumferential direction around the adapter's longitudinal axis. This can increase the stability of a connection established with the adapter.

In a preferred embodiment of the invention, exactly two centering lugs and exactly two locking hooks are arranged on the first base body end. In this way, tilting of the adapter connected to the connecting element can be avoided when subjected to tension or bending.

This can be further improved by having the centering lugs relative to one another and/or the locking hooks relative to one another with a regular angular offset with respect to the adapter's longitudinal axis. With exactly two centering lugs or locking hooks, there is an angular offset of 180° between the two centering lugs or between the two locking hooks.

Preferably, in particular if exactly two centering lugs and locking hooks are present, a centering lug-locking hook angular offset between centering lugs and locking hooks following one another in the circumferential direction around the adapter longitudinal axis is at least 30°. The centering lug locking hook angular offset is particularly preferably 90°. Such a centering lug-locking hook angular offset can result in a more even distribution of the centering lugs and locking hooks over the circumference of the adapter. As a result, the described tilting stability of the adapter connected to the connecting element can be further increased in the event of tensile or bending stress.

In one embodiment of the invention, the adapter has a polygonal, preferably rectangular, particularly preferably square, cross-section perpendicular to the adapter's longitudinal axis, with adapter sides aligned parallel to the adapter's longitudinal axis. With such a cross section, the position of the at least one locking lug on at least one of the adapter sides can be defined. This allows the adapter to be particularly easy to handle. In addition, with a polygonal cross section, a torque acting around the adapter's longitudinal axis can be transferred particularly well to the hollow profile connected to the adapter.

Preferably, the centering lugs and the at least one locking hook are arranged off-center with respect to the adapter sides. This allows several adapters to be connected to a connecting element without the centering lugs and the at least one locking hook of adapters connected to the connecting element lying opposite one another on the same axis. As a result, the connecting element can be designed to be particularly compact without the centering lugs and the at least one locking hook of different adapters connected to the connecting element colliding with one another.

At the first end of the base body, a stop can be arranged which protrudes radially outwards over the lateral surface with respect to the longitudinal axis of the adapter. This can prevent the adapter from sliding too far into the hollow profile and the resulting loss of the adapter in the hollow profile. This is particularly relevant if the adapter is arranged in the hollow profile in such a way that it cannot be locked in the hollow profile with the at least one locking lug. Preferably, the stop is designed to be completely circumferential in relation to the adapter's longitudinal axis.

Particularly preferably, the first base body end is formed by a plate arranged perpendicular to the adapter longitudinal axis, which protrudes in the radial direction beyond the lateral surface with respect to the adapter longitudinal axis. In particular if the base body is tubular, the plate can move towards the adapter's longitudinal axis and away from the adapter The longitudinal axis protrudes beyond the lateral surface. The stop can be formed in particular by the projection pointing away from the adapter longitudinal axis. To reduce weight, among other things, the plate can have an opening along the longitudinal axis of the adapter.

At least one rib aligned parallel to the longitudinal axis of the adapter can be arranged on the lateral surface. Preferably at least one of the ribs is formed on each adapter side. The at least one rib can improve the fit of the adapter in the hollow profile. Particularly if the hollow profile is subject to a large manufacturing tolerance, a play-free fit, a so-called press fit, of the adapter in the hollow profile can be achieved. If the hardness of the at least one rib sufficiently exceeds the hardness of the hollow profile, the at least one rib can produce a positive connection between the adapter and the hollow profile, which can lead to an improvement in the stability of the connection between the adapter and the hollow profile.

Preferably, three ribs are arranged on both sides adjacent to the at least one locking lug. This allows the fit of the adapter in the hollow profile to be further improved.

The at least one locking lug can be formed by a section partially cut out of the lateral surface. For this purpose, for example, a cut can be made in the lateral surface of the tubular base body on all but one edge delimiting the at least one locking lug. In this way, the at least one locking lug can be manufactured particularly easily and with as little additional material expenditure as possible. In particular, the spring effect of the at least one locking lug can be realized so easily.

The at least one locking lug can be beveled in the direction of the second base body end in order to enable easier insertion of the adapter into the hollow profile.

Preferably, there are exactly two locking lugs which have a locking lug angular offset of 180° with respect to the adapter's longitudinal axis. The two locking lugs are therefore preferably arranged opposite one another. In this way, the forces that occur when the locking lugs are actuated can be largely balanced out. In addition, a very ergonomic arrangement of the locking lugs can be achieved in this way, particularly with regard to manual operation.

• • mindestens eine Anlagefläche zur Anlage des ersten Grundkörperendes des Adapters,
• • wobei in der Anlagefläche mindestens zwei Zentrierbohrungen zur Aufnahme der Zentriernasen und mindestens eine Arretieröffnung mit einem Hinterschnitt zum Verrasten der Arretierhaken angeordnet ist,
• • wobei die Zentrierbohrungen den Zentriernasen und die mindestens eine Arretieröffnung dem mindestens einen Arretierhaken in Anzahl und Anordnung entsprechen,
• • eine Eingriffsöffnung, durch die der Hinterschnitt unabhängig von der mindestens einen Arretieröffnung von außen zugänglich ist.

The connecting element for connecting to at least one adapter described above includes the following features:

• • at least one contact surface for contacting the first base body end of the adapter,
• • wherein at least two centering holes for receiving the centering lugs and at least one locking opening with an undercut for locking the locking hooks are arranged in the contact surface,
• • where the centering holes correspond to the centering lugs and the at least one locking opening corresponds to the at least one locking hook in number and arrangement,
• • an engagement opening through which the undercut is accessible from the outside independently of the at least one locking opening.

The centering holes and the at least one locking opening are preferably formed perpendicular to the contact surface.

Because the centering holes correspond to the centering lugs and the at least one locking opening corresponds to the at least one locking hook in number and arrangement, the adapter can be connected to the connecting element and locked. The at least one locking opening is preferably arranged in such a way that the at least one locking hook is deflected resiliently when inserted into the at least one locking opening. This allows the locking hook to snap back at the end of the insertion process and automatically engage with the undercut. Because the undercut is accessible from the outside through the engagement opening independently of the at least one locking opening, the at least one locking hook that engages with the undercut can be deflected and the locking of the adapter in the connecting element can thus be released. Preferably, the connecting element is designed such that a tool for releasing the lock can be inserted into the engagement opening.

In a preferred embodiment of the invention, the connecting element is cube-shaped with six connecting element sides and at least one of the connecting element sides has one of the at least one contact surface. As a result, the connecting element can be designed to be particularly compact.

Particularly preferably, each of the connecting element sides has one of the contact surfaces. The connecting element thus preferably has exactly six contact surfaces, so that up to six of the adapters can be connected to the connecting element. In combination with the above-described arrangement of the centering holes and the at least one locking opening, the connection has a compact structure elements possible. The external dimensions of the respective connecting element side preferably correspond to those of the respective contact surface.

The engagement opening can be designed as a through opening which connects a first connecting element side with a second connecting element side opposite the first connecting element side. This can improve the accessibility of the undercut.

Preferably, the connecting element, particularly preferably completely, is made of plastic. As a result, the connecting element can have a low weight and be inexpensive to produce. In addition, a connecting element made of plastic can have the strength and rigidity required for modeling. The connecting element is particularly preferably formed in one piece.

A connecting device according to the invention has at least one adapter described above and one connecting element described above, wherein the at least one adapter can be coupled to the connecting element in such a way that the at least two centering lugs with the at least two centering holes, the at least one locking hook with the at least one locking opening and that first base body end interacts with one of the at least one contact surface. The coupled state of the connecting device can preferably be described in such a way that the first base body end rests on the at least one contact surface, the at least two centering lugs are arranged in the at least two centering holes of this at least one contact surface and the at least one locking hook with the undercut of the at least one locking opening of this at least one contact surface is engaged.

• • mindestens einen vorstehend beschrieben Adapter und/oder eine vorstehend beschriebene Verbindungsvorrichtung, und
• • ein Hohlprofil mit einer Hohlprofil-Mantelfläche, die mindestens eine Rastbohrung aufweist, die in ihrer Anzahl und Anordnung der an dem Adapter angeordneten mindestens einen Rastnase entspricht,
• • wobei der Adapter der mindestens einen Verbindungsvorrichtung derart stirnseitig in dem Hohlprofil anordenbar ist, dass die mindestens eine Rastnase mit der mindestens einen Rastbohrung in Wechselwirkung steht.

A hollow profile assembly according to the invention comprises

• • at least one adapter described above and/or a connection device described above, and
• • a hollow profile with a hollow profile lateral surface which has at least one locking hole, the number and arrangement of which corresponds to the at least one locking lug arranged on the adapter,
• • wherein the adapter of the at least one connecting device can be arranged in the hollow profile on the front side in such a way that the at least one locking lug interacts with the at least one locking hole.

As a result, the adapter or the connecting device can be connected to the hollow profile in a simple, stable, secure and detachable manner. Preferably, in the coupled state, the at least one latching lug interacts with the at least one latching bore in such a way that the at least one latching lug engages in the at least one latching bore. In order to achieve particularly easy releasability of the latching, the at least one latching hole is preferably designed as a through hole.

The at least one hollow profile is preferably made of cardboard, plastic or aluminum. Each of these materials enables the realization of a lightweight and at the same time stiff hollow profile assembly. The term “aluminum” in the context of the present invention includes aluminum alloys. Particularly preferably, the at least one hollow profile is made entirely of cardboard. This enables cost-effective and environmentally friendly production of a sufficiently stable hollow profile assembly. In particular, the availability of the at least one hollow profile made of the different materials makes the hollow profile assembly attractive and usable not only for the field of cardboard engineering, but for a broader area of application in device construction, even beyond modeling applications, for example in shelf construction.

• 1 eine perspektivische Darstellung eines Ausführungsbeispiels eines Adapters,
• 2 eine Seitenansicht des in 1 dargestellten Adapters mit gekennzeichneter Schnittebene A-A,
• 3 die in 2 gekennzeichnete Schnittansicht A-A des in 1 dargestellten Adapters,
• 4 eine Vorderansicht des in 1 dargestellten Adapters,
• 5 eine Rückansicht des in 1 dargestellten Adapters mit gekennzeichnetem Detail B,
• 6 die in 5 gekennzeichnete Detailansicht B des in 1 dargestellten Adapters,
• 7 eine perspektivische Darstellung eines Ausführungsbeispiels eines Verbindungselements,
• 8 eine erste Seitenansicht des in 7 dargestellten Verbindungselements,
• 9 eine zweite Seitenansicht mit Teilschnitt des in 7 dargestellten Verbindungselements,
• 10 eine dritte Seitenansicht des in 7 dargestellten Verbindungselements,
• 11 eine perspektivische Explosionsdarstellung eines Ausführungsbeispiels einer Hohlprofil-Baugruppe,
• 12 eine perspektivische Darstellung der in 11 gezeigten Hohlprofil-Baugruppe in teilweise montiertem Zustand,
• 13 eine Seitenansicht der in 11 gezeigten Hohlprofil-Baugruppe mit gekennzeichneten Schnittebenen C-C und D-D,
• 14 die in 13 gekennzeichnete Schnittansicht C-C der in 11 dargestellten Hohlprofil-Baugruppe,
• 15 die in 13 gekennzeichnete Schnittansicht D-D der in 11 dargestellten Hohlprofil-Baugruppe.

Exemplary embodiments of the invention are explained using the following figures. It shows:

• 1 a perspective view of an exemplary embodiment of an adapter,
• 2 a side view of the in 1 adapter shown with marked cutting plane AA,
• 3 in the 2 marked sectional view AA of the in 1 adapter shown,
• 4 a front view of the in 1 adapter shown,
• 5 a rear view of the in 1 adapter shown with marked detail B,
• 6 in the 5 marked detailed view B of the in 1 adapter shown,
• 7 a perspective view of an exemplary embodiment of a connecting element,
• 8th a first side view of the in 7 illustrated connecting element,
• 9 a second side view with a partial section of the in 7 illustrated connecting element,
• 10 a third side view of the in 7 illustrated connecting element,
• 11 a perspective exploded view of an exemplary embodiment of a hollow profile assembly,
• 12 a perspective view of the in 11 Hollow profile assembly shown in partially assembled state,
• 13 a side view of the in 11 hollow profile assembly shown with marked cutting planes CC and DD,
• 14 in the 13 marked sectional view CC of the in 11 hollow profile assembly shown,
• 15 in the 13 marked sectional view DD of the in 11 hollow profile assembly shown.

The 1 until 15 show different views of different exemplary embodiments. For the sake of clarity, not all reference symbols are used in every figure. The same reference numbers are used for identical and functionally identical parts.

1 shows an adapter 100 with a tubular base body 102, which has a lateral surface 104, a first base body end 106 and a second base body end 108 arranged opposite the first base body end 106. The adapter further comprises an adapter longitudinal axis 110, which runs centrally through the base body 102 through the first base body end 106 and the second base body end 108. The adapter 100 has a square cross section perpendicular to the adapter longitudinal axis 110 with four adapter sides 111 aligned parallel to the adapter longitudinal axis 110.

In the in 2 In the side view of the adapter shown, the adapter longitudinal axis 110 lies in the section plane AA. At the first base body end 106, in the direction of the adapter longitudinal axis 110, two centering lugs 112 aligned parallel to the adapter longitudinal axis 110 and two resilient locking hooks 114 aligned parallel to the adapter longitudinal axis 110 are arranged. In addition, two locking lugs 116 are arranged resiliently in the lateral surface 104.

Especially from the illustration in 2 It can be seen that the two centering lugs 112 each have a centering lug chamfer 118 at their end facing away from the first base body end 106. In addition, the two centering lugs 112 are longer in the direction of the adapter longitudinal axis 110 than the two locking hooks 114. The two arresting hooks 112 taper towards their end facing away from the first base body 106. The centering lugs 112 can also be hollow. Also shows in particular 2 that the adapter has a chamfer 120 at the second base body end 108.

In particular 4 shows that the centering lugs 112 and the locking hooks 114 are arranged alternately in the circumferential direction around the adapter longitudinal axis 110. The centering lugs 112 have a regular angular offset to one another and the locking hooks 114 to one another with respect to the adapter longitudinal axis 110, so that there is an angular offset 122 of 180° between the two centering lugs 112 or between the two locking hooks 114. A centering lug-locking hook angular offset 124 between centering lugs 112 and locking hooks 114 following one another in the circumferential direction around the adapter longitudinal axis 110 is approximately 90°. The centering lugs 112 and locking hooks 114 are thus evenly distributed over the circumference of the adapter 100. In addition, the centering lugs 112 and the locking hooks 114 are arranged off-center with respect to the adapter sides 111.

Like especially in the 1 and 3 shown, the first base body end 106 is formed by a plate 125 arranged perpendicular to the adapter longitudinal axis 110, which projects beyond the base body 102 in the radial direction with respect to the adapter longitudinal axis 110. The plate 124 protrudes over the lateral surface 104 towards the adapter longitudinal axis 110 and away from the adapter longitudinal axis 110. A stop 126 is formed by the projection pointing away from the adapter longitudinal axis 110. The plate 124 has an opening 128 along the adapter longitudinal axis 110. The in 2 Partial section shown as well as that in 3 The sectional view shown shows that the adapter is formed in one piece.

The two locking lugs 116 are formed by a section partially cut out of the lateral surface 104, in that a cut 130 is made in the lateral surface 104 of the tubular base body 102 on all but one edge delimiting the respective locking lug 116 (see in particular 2 ).

The two locking lugs 116 are designed to be resilient like the locking hooks 114. 3 shows that the two locking lugs 116 are beveled towards the second base body end 108.

In addition, the view in particular shows 5 that the two locking lugs 116 are arranged on two opposite sides of the adapter 111. With respect to the adapter longitudinal axis 110, there is a locking lug angular offset 132 of 180°. The two locking lugs 116 are thus arranged opposite one another.

5 also shows that on the lateral surface 104 several ribs 134 aligned parallel to the adapter longitudinal axis 110 are arranged. Three of the ribs 134 are arranged on both sides adjacent to each of the two locking lugs 116. A corresponding detailed description can be found in 6 . One of the ribs 134 is arranged centrally on each of the two remaining adapter sides 111.

• • sechs Anlageflächen 202 zur Anlage des ersten Grundkörperendes 106 des Adapters 100,
• • wobei in der Anlagefläche 202 zwei Zentrierbohrungen 204 zur Aufnahme der Zentriernasen 112 und zwei Arretieröffnungen 206 mit jeweils einem Hinterschnitt 208 zum Verrasten der Arretierhaken 114 angeordnet ist,
• • eine Eingriffsöffnung 210, durch die der jeweilige Hinterschnitt 208 unabhängig von der jeweiligen Arretieröffnung 206 von außen zugänglich ist.

A connecting element 200 for connecting to at least one of the adapters 100 described above is in the 7 until 10 presented in detail. It includes the following features:

• • six contact surfaces 202 for contacting the first base body end 106 of the adapter 100,
• • wherein two centering bores 204 for receiving the centering lugs 112 and two locking openings 206, each with an undercut 208 for locking the locking hooks 114, are arranged in the contact surface 202,
• • an engagement opening 210 through which the respective undercut 208 is accessible from the outside independently of the respective locking opening 206.

As in 7 is shown, the connecting element 200 is cube-shaped with six connecting element sides 212. Each of the contact surfaces 202 is arranged on one of the connecting element sides 212. The three in 7 The visible contact surfaces 202 differ visually, but have identical effective surfaces. This will also come from the 8th until 10 clear, in which the three connecting element sides 212 with the different contact surfaces 202 are shown. Accordingly, the adapter 100 can be arranged on each of the contact surfaces 202 of the connecting element 200. This means that up to six of the adapters 100 can be connected to the connecting element 200. The opposing contact surfaces 202 are each designed identically.

The centering holes 204 and the locking openings 206 are formed perpendicular to the respective contact surface 202. Because the centering holes 204 correspond to the centering lugs 112 and the locking openings 206 correspond to the locking hooks 114 in number and arrangement, the adapter 100 can be connected to the connecting element 200 and locked.

Out of 8th Using the example of the centering holes 204 visible from the outside, it is particularly clear why the centering lugs 112 and the locking hooks 114 as well as the centering holes 204 and the locking openings 206 are arranged off-center with respect to the adapter sides 111 or with respect to the connecting element side 212: This allows the connection of several of the adapters 100 to the connecting element 200, without the centering lugs 112 and the locking hooks 114 of adapters 100 connected opposite one another to the connecting element 200 lying on the same axis. As a result, the connecting element 200 can be designed to be particularly compact without the centering lugs 112 and the locking hooks 114 of various adapters 100 connected to the connecting element 200 colliding with one another.

Like in particular 10 is shown, the engagement opening 210 is designed as a through opening that connects a first connecting element side with a second connecting element side opposite the first connecting element side. This allows the accessibility of the undercut 208 to be improved. In particular due to the size of the engagement opening 210 and its design as a through opening, a tool for releasing the lock can be inserted into the engagement opening 210.

The locking hooks 114 engaging in the undercut 208 and their position in the engagement opening 210 are in 15 shown.

In the 11 until 15 a hollow profile assembly 400 is shown, which has a connecting device 300, comprising the adapter 100 and the connecting element 200 (see 11 ), and a hollow profile 402 with a hollow profile lateral surface 404.

The locking openings 206 are arranged so that the locking hooks 114 when in 12 shown insertion into the respective locking opening 206 is deflected resiliently. This allows the locking hooks 114 to snap back at the end of the insertion process and automatically engage with the undercut 208. The locking hooks 114 then preferably protrude into the engagement opening 210 ( 14 ).

In the coupled state of the connecting device 300 ( 13 until 15 ), the first base body end 106 lies against the corresponding contact surface 202. The centering lugs 112 are arranged in the centering holes 204 of this contact surface 202 and the locking hooks 114 are in engagement with the undercuts 208 of the locking openings 206 of this contact surface 202.

Because the undercut 208 is accessible from the outside through the engagement opening 210 independently of the locking openings 206, the with The locking hook 114 in engagement with the undercut 208 is deflected and the locking of the adapter 100 in the connecting element 200 can thus be released.

The hollow profile lateral surface 404 of the hollow profile 402 has two locking bores 406, the arrangement of which corresponds to the locking lugs 116 arranged on the adapter 100. Accordingly, the in 11 and 12 A further locking hole 406 is arranged opposite the locking hole 406 shown in the hollow profile lateral surface 404. The adapter 100 can be arranged at the front in the hollow profile 402 in such a way that the locking lugs 116 interact with the locking holes 406. As in 12 shown, the locking lugs 116 engage in the locking holes 406. The locking holes 406 are designed as through-holes.

Reference symbol list

100

adapter

102

Basic body

104

Lateral surface

106

first base body end

108

second base body end

110

Adapter longitudinal axis

111

Adapter side

112

centering nose

114

Locking hook

116

detent nose

118

Centering nose chamfer

120

chamfer

122

Angular offset

124

Centering lug locking hook angle offset

125

plate

126

attack

128

breakthrough

130

cut

132

Detent angular offset

134

rib

200

connecting element

202

investment area

204

Centering holes

206

Locking openings

208

Undercut

210

Access opening

212

Fastener page

300

Connection device

400

Hollow profile assembly

402

Hollow profile

404

Hollow profile surface

406

Locking hole

Claims (23)

Adapter (100) for arrangement on a hollow profile (402), comprising the following features: • a base body (102) with a lateral surface (104), a first base body end (106) and a second base body end (108) arranged opposite the first base body end (106), • an adapter longitudinal axis (110), which runs centrally through the base body (102) through the first base body end (106) and the second base body end (108), • wherein at least two centering lugs (112) aligned parallel to the adapter longitudinal axis (110) and at least one resilient locking hook (114) aligned parallel to the adapter longitudinal axis (110) are arranged on the first base body end (106) in the direction of the adapter longitudinal axis (110), • the at least two centering lugs (112) are designed to be longer in the direction of the adapter longitudinal axis (110) than the at least one locking hook (114), and • wherein at least one locking lug (116) is arranged resiliently on and/or in and/or on the lateral surface (104). adapter Claim 1 , characterized in that the adapter (100), preferably entirely, is made of plastic. Adapter according to one of the preceding claims, characterized in that the base body (102) is tubular. Adapter according to one of the preceding claims, characterized in that the centering lugs (112) and the at least one locking hook (114) are arranged alternately in the circumferential direction around the adapter longitudinal axis (110). Adapter according to one of the preceding claims, characterized in that exactly two centering lugs (112) and exactly two locking hooks (114) are arranged on the first base body end (106). Adapter according to one of the preceding claims, characterized in that the centering lugs (112) relative to one another and/or the locking hooks (114) relative to one another with respect to the adapter longitudinal axis (110) have a regular angular offset (122). Adapter according to one of the preceding claims, characterized in that a centering lug-locking hook angular offset (124) between centering lugs (112) and locking hooks (114) following one another in the circumferential direction around the adapter longitudinal axis (110) is at least 30°, preferably 90°. Adapter according to one of the preceding claims, characterized in that the adapter (100) has a polygonal, preferably rectangular, particularly preferably square cross section perpendicular to the adapter longitudinal axis (110) with adapter sides (111) aligned parallel to the adapter longitudinal axis (110). adapter Claim 8 , characterized in that the centering lugs (112) and the at least one locking hook (114) are arranged off-center with respect to the adapter sides (111). Adapter according to one of the preceding claims, characterized in that a stop (126) which projects radially outwards over the lateral surface (104) with respect to the adapter longitudinal axis (110) is arranged on the first base body end (106). Adapter according to one of the preceding claims, characterized in that the first base body end (106) is formed by a plate (125) arranged perpendicular to the adapter longitudinal axis (110) and which projects in the radial direction over the lateral surface (104) with respect to the adapter longitudinal axis (110). Adapter according to one of the preceding claims, characterized in that at least one rib (134) aligned parallel to the adapter longitudinal axis (110) is arranged on the lateral surface (104). adapter Claim 12 , characterized in that three ribs (134) are arranged on both sides adjacent to the at least one locking lug (116). Adapter according to one of the preceding claims, characterized in that the at least one locking lug (116) is formed by a section partially cut out of the lateral surface (104). Adapter according to one of the preceding claims, characterized in that there are exactly two locking lugs (116) which have a locking lug angular offset (132) of 180° with respect to the adapter longitudinal axis (110). Connecting element (200) for connection to at least one adapter (100) according to one of the preceding claims, comprising the following features: • at least one contact surface (202) for contacting the first base body end (106) of the adapter (100), • wherein at least two centering bores (204) for receiving the centering lugs (112) and at least one locking opening (206) with an undercut (208) for locking the at least one locking hook (114) are arranged in the at least one contact surface (202), • wherein the centering holes (204) correspond to the centering lugs (112) and the at least one locking opening (206) corresponds to the at least one locking hook (114) in number and arrangement, • an engagement opening (210) through which the undercut (208) is accessible from the outside independently of the at least one locking opening (206). Connecting element Claim 16 , characterized in that the connecting element (200) is cube-shaped with six connecting element sides (212) and at least one of the connecting element sides (212) has one of the at least one contact surface (202). Connecting element Claim 17 , characterized in that each of the connecting element sides (212) has one of the contact surfaces (202). Connecting element according to one of the Claims 16 until 18 , characterized in that the engagement opening (210) is designed as a through opening which connects a first connecting element side (212) with a second connecting element side (212) opposite the first connecting element side. Connecting element according to one of the Claims 16 until 19 , characterized in that the connecting element (200), preferably entirely, is made of plastic. Connection device (300) with at least one adapter (100) according to one of Claims 1 until 15 and a connecting element (200) according to one of Claims 16 until 20 , wherein the at least one adapter (100) can be coupled to the connecting element (200) in such a way that the at least two centering lugs (112) with the at least two centering holes (204), the at least one locking hook (114) with the at least one locking opening (206 ) and the first basic body end (106) interact with one of the at least one contact surface (202). Hollow profile assembly (400) with • at least one adapter (100) according to one of the Claims 1 until 15 and/or at least one connecting device (300). Claim 21 , and • at least one hollow profile (402) with a hollow profile lateral surface (404) which has at least one locking hole (406), which corresponds in number and arrangement to the at least one locking lug (116) arranged on the adapter (100), • wherein the adapter (100) can be arranged on the front side in the at least one hollow profile (402) in such a way that the at least one locking lug (116) interacts with the at least one locking bore (406). Hollow profile assembly Claim 22 , characterized in that the at least one hollow profile (402) is made of cardboard, plastic or aluminum.

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