DE29509515U1 - Device for fastening a tubular or rod-shaped element to a wall or plate-shaped component or vice versa - Google Patents

Description

DE 6878 _g ...: ·/*:*.'·. .'·..':**": Patent Attorney

.•'••I''*·..··..· ··'···* Graduate physicist Reinfried Frhr. &ngr;. Schorlemer

Karthäuserstr. 5A 34117 Kassel Germany

Telephone (0561) 15335

(0561)780031

Fax/Telecopter (0561)780032

HEWI Heinrich Wilke GmbH, 34454 Arolsen

Device for fastening a tubular or rod-shaped element to a wall or plate-shaped component or vice versa

The invention relates to a device of the type specified in the preamble of claim 1 and a prefabricated structural unit produced therewith.

Devices are known for fastening tubular or rod-shaped elements to walls, doors or the like, which essentially consist of a rosette to be fastened to the wall, door or the like (DE 31 32 855 C2). The elements can be fastened at their ends using curved elements bent by approx. 90° and/or at middle sections using short support or spacers attached to the elements. In any case, the cross-sections of the rosettes are necessarily much larger than the cross-sections of the tubular or rod-shaped elements, since they have holes for fastening screws on their circumference, which are covered with a cover cap after assembly. Conversely, such fastening devices could of course also be used to fasten a plate or wall-shaped component to a tube or rod-shaped element, whereby in the case of components made of wood or similar, wood screws could also be used.

It is also known (DE 31 47 092 C2) to fix pipe ends to walls while avoiding rosettes by first fixing a stud bolt in the wall using a dowel and then inserting the end protruding from the wall into an axial hole in the tubular element, whereupon both are then secured by

a cross pin. However, this type of assembly is not applicable when using plate-shaped components in the form of thin wooden boards or similar, because dowels cannot be attached to such components and the stud bolts would therefore have to be secured with nuts from the other side of the component. Alternatively, fastening screws could be screwed into the receiving holes in the tubular or rod-shaped elements from the other side of the component. Both of these would mean, however, that the nuts or screw heads would be visible on the component and would have to be covered by cover caps if necessary.

Finally, it is known (DE 35 07 158 C2) to insert special plate holders into the ends of the tubes in which the plate-shaped components are clamped in place to connect tubular or rod-shaped elements and plate-shaped components. However, such fastening devices are only suitable for special applications, e.g. for mounting plates made of glass or similar when making furniture, such as side tables or stools.

For most applications of the type of interest here, it is therefore necessary to accept either rosettes with undesirably large cross-sections or visible nuts, screw heads or cover caps, both of which are often to be avoided for design reasons.

In contrast, the invention is based on the object of designing the fastening device of the type described at the beginning in such a way that rosettes and visible screw heads or the like can be completely dispensed with. Furthermore, the fastening device should consist of as few individual parts as possible and the assembly carried out with their help should be easy to carry out with just a few simple steps.

The characterizing features of claims 1 and 10 serve to solve this problem.
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Further advantageous features of the invention emerge from the subclaims.

The invention is described below in conjunction with the accompanying drawing on a

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The following example is explained in more detail.

Fig. 1 and 2 in a front view and a section along the line Π-Π a device according to the invention for fastening a plate-shaped component to a tubular or rod-shaped element;

Fig. 3 and 4 show, on an enlarged scale, longitudinal sections through a spacer of the fastening device according to Fig. 1 and 2 in two positions rotated by 90° about the longitudinal axis;
10

Fig. 5 and 6 show, on an enlarged scale, a front view and a plan view of a clamping sleeve of the device according to Fig. 1 and 2;

Fig. 7 is a section along the line VH-VII of Fig. 5; and 15

Fig. 8 and 9 show, in enlarged representations, a vertical section through the device according to Fig. 1 along a plane perpendicular to the cutting plane Π-Π in a pre-assembled and fully assembled state of the device.

Fig. 1 and 2 show a coat rack that can be used for kindergartens, schools, etc. It contains a coat rack 1 to which a number of pictogram holders 2 with coat hooks 3 are attached, whereby certain markings in the form of numbers, pictures, symbols, etc. can be inserted into the pictogram holders 2 to mark the coat rack spaces. The coat rack 1 is provided at its ends with arched elements 4 that run over an angle of e.g. 90° and is attached to a wall 6 with additional rosettes 5. Therefore, the arched element 4 on the right in Fig. 1 is partially covered in Fig. 2 by the pictogram holders 2. For further fastening the coat rack 1 to the wall 6, supports (not shown) can be provided that are attached to middle sections of the coat rack 1.

Above the coat rack 1 there is a shelf 7 for hats or the like, which essentially consists of two perpendicular, plate-shaped components 8 and

9, eg wooden boards. In the assembled state, the coat rack is arranged essentially horizontally and at a distance from the wall 6, while the component 8 is also arranged with its broad sides horizontally and at a distance above the coat rack 1. The component 7, on the other hand, is arranged essentially vertically with its broad sides and can be attached to the wall 6 in a manner not shown if required.

The shelf 7, in particular its horizontally arranged component 8, should be able to be mounted in a kindergarten, school or similar in a mechanically stable manner in the entire wardrobe unit so that it can withstand, for example, the loads that occur when children hang on to the component 8 while playing or for other reasons. According to the invention, a fastening device is therefore provided which contains a plurality of support or spacer pieces 10 which are firmly attached to the wardrobe rod 1 on the one hand and on which the component 8 rests on the other hand, whereby the latter is also attached to the spacer piece 10. As a result, the shelf 7 and in particular the component 8 are mainly supported by the wardrobe rod 1, which, apart from the pictogram holders 2 and coat hooks 3, is designed like a handrail, a banister or the like and, like this, can be attached to the wall 6 in an extremely stable manner.

According to Fig. 3 and 4, the spacer 10 is sleeve-shaped and is provided with a passage 12 running coaxially to a longitudinal axis 11. At its end intended for supporting the component 8, the spacer 10 preferably has a flat front surface 14 running perpendicular to the longitudinal axis 11. The other end of the spacer 10, on the other hand, is provided with a front surface 15 which is adapted to the outer contour of the wardrobe rod 1 or the tubular or rod-shaped element forming it and is intended to rest on its outer surface. In the exemplary embodiment, the wardrobe rod 1 has a circular cross-section, which is why the front surface 15 is concave with a corresponding radius and is designed in such a way that it ends in two tapered sections 16 which enclose the wardrobe rod 1 approximately on the upper half of its cross-section (Fig. 1). Furthermore, the spacer can have an outer surface that corresponds to the outer surface of the wardrobe rod and is, for example, cylindrical.

At the end of the spacer 10 having the front face 14, the previously preferably cylindrical passage 12 has a shoulder 17, through which a section 18 is created towards the free end, in which the cross section of the passage 12 is slightly larger than in the area bordering the front face 15 of the spacer 10, except for two diametrically opposed flats or stop surfaces 19. The section 18 is followed by a section 20 of the passage 12, which is further expanded in cross section towards the front face 14 and is, for example, conical.

The device according to the invention also has a clamping sleeve 22 for each spacer 10 (Fig. 5 to 7). The clamping sleeve 22 is provided with a preferably cylindrical passage 24 coaxial to its longitudinal axis 23 and has an external cross section that essentially corresponds to the smallest cross section of the passage 12. It is also provided in an end section 25 with at least one longitudinal slot

26 (Fig. 5) which allows this end section 25 to be elastically expanded or compressed. Finally, the end section 25 is provided with a circumferential shoulder

27, from which the external cross section of the clamping sleeve 22 to its free end is slightly larger than in the middle area.

At the opposite end, the clamping sleeve 22 has an end section 28 in which it also has a slightly larger external cross-section than in the middle area and which begins at a circumferential shoulder 29. At least one flattening or stop surface 30 is incorporated into this shoulder 29. Otherwise, the individual sections of the clamping sleeve 22 are preferably cylindrical.

As shown in particular in Fig. 6, a slot-shaped recess 31 arranged transversely to the passage 24 is incorporated into the outer end face of the end section 25 and has a defined position relative to the stop surfaces 30. The recess 31 allows the position of the stop surfaces 30 to be recognized, even if these are not immediately visible.

The wardrobe rail 1 (Fig. 1) is constructed from at least one, but possibly also from a plurality of tubular or rod-shaped elements 33 according to Fig. 8 and 9. In the exemplary embodiment, the element 33 consists of a steel tube 34 and a plastic casing 35 pushed onto it, both of which are coaxial to a longitudinal axis

36 of the element 33. In addition, the element 33 has a passage with an axis 38 running perpendicular to the longitudinal axis 36 (Fig. 8), which essentially consists of two diametrically opposed recesses in the steel tube 34 or the plastic casing 35. The passage 37 is a component of the device according to the invention.

The assembly of the shelf 7 can be carried out using the described device parts, for example as follows.

First, the clamping sleeve 22 is inserted with its end section 25 into the section 20 of the spacer 10 provided with the cross-sectional expansion and then pressed further down into its passage 12 until the end section 25 emerges from the other end of the passage 12. For this purpose, the cross-sectional ratios in the exemplary embodiment are selected such that the cross-section of the end section 25 is normally slightly larger than the narrowest part of the passage 12, but can be compressed sufficiently due to the slots 26. If the end section 25 then emerges from the passage at the end of the spacer 10 having the front surface 15, the end section 25 is automatically slightly elastically expanded. Since the end section 28 of the clamping sleeve 22 has a smaller cross-section than the extended section 20 of the spacer 10, but a larger cross-section than the smallest cross-section of the passage 12, the clamping sleeve 22 is thereby secured in the spacer 10 in a captive manner.

The end of the spacer 10 with the front face 15 is now placed on the element 33 from the outside (in Fig. 8 from above), with its passage 12 being aligned with the passage 37. The clamping sleeve 22 is then pressed further into the spacer 10 and at the same time with its end section 25 into the passage 37, the cross section of which is also somewhat smaller than the cross section of the end section 25. As a result, the end section 25 is initially elastically compressed until it is completely arranged inside the steel tube 34 and thereby expands elastically again. The shoulder 27 and the inner edge of the passage thus form interacting snap connection elements which, when assembled, allow the connection consisting of the element 33, the spacer 10 and the clamping sleeve 22 to be released.

The assembly can only be removed against the effect of the snap connection, for example by forcibly compressing the end section 25 using a tool from the still open side of the passage 37. At the same time, the shoulder 29 of the clamping sleeve 22, which cooperates with the shoulder 17 of the spacer 10, prevents the spacer 10 from being accidentally pulled off of it.

From the open side of the passage 37, a fastening screw 40 (Fig. 8, 9), designed as a wood screw, for example, is now screwed into the passage 24 (Fig. T) of the clamping sleeve 22. The diameter ratios are preferably selected so that when the fastening screw 40 is screwed in, the end section 25 of the clamping sleeve 22 is spread even further in the area of the slots 26 (Fig. 5) or at least held in the previously created spread position. The length of the fastening screw 40 is preferably selected so that its usually sharp tip 41 is still in the expanded section 20 of the spacer 10 when its head just disappears into the passage 37 (Fig. 8). This avoids the risk of injury during handling.

In order to prevent the clamping sleeve 22 from rotating when the fastening screw 40 is turned, the stop surfaces 19 and 30 shown in Fig. 4 and 5 are dimensioned and arranged in such a way that they only allow the end section 25 of the clamping sleeve 22 to be completely pressed into the passage 37 after they have been aligned with one another by rotating the clamping sleeve 22 relative to the spacer 10. Without this alignment, the shoulder 29 of the clamping sleeve 22 would rest on the upper ends of the stop surfaces of the spacer 10 in Fig. 3. After the corresponding alignment, however, not only can the clamping sleeve 22 be pushed further forward by an amount corresponding to the axial length of the section 18, but the stop surfaces 19, 30 also come into contact with one another at the same time, whereby they act as anti-rotation elements. The correct alignment of the clamping sleeve 22 to the spacer 10 can be achieved, for example, with a tool inserted into the recess 31 (Fig. 7). The correct rotational position is achieved, for example, when the longitudinal axis of the recess 31 is arranged parallel to the longitudinal axis 36 of the element 33.

The described alignment of the clamping sleeve 22 in the spacer 10 also serves the

The purpose of allowing the shoulder 27 of the clamping sleeve 22 to engage behind the inner edge of the passage 37 of the element 33 only when it is correctly aligned. This can ensure, for example, when manufacturing the clamping sleeve 22 from plastic by injection molding that the end section 25 penetrated by the slot 26 and the shoulder 27 assume a position in the assembled state that is advantageous for injection molding reasons and avoids undesirable breakage of the clamping sleeve 22 when the end section 25 is spread using the fastening screw.

The pre-assembly of the element 33, the spacer 10, the clamp sleeve 22 and preferably also the fastening screw 40, as shown in Fig. 8, is preferably carried out wherever the component 8 is to be supported and therefore the coat rack 1 is provided with a passage 37. This results in the advantage that the coat rack 1 including all spacers 10, rosettes 5, pictogram holder 2 and coat hooks 3 (Fig. 1 and 2) can be pre-assembled as a complete unit in the manufacturer's factory and transported to the construction site in this form.

After the described pre-assembly of the various parts, the wardrobe rail 1 is first attached to the wall 6 in the manner shown in Fig. 1 and 2. The shelf 7 is then placed on top so that the component 8 is in the desired position relative to the wardrobe rail 1. Finally, the fastening screws 40 are screwed into the component 8 in the manner shown in Fig. 9, with their axial length being selected such that the tip 41 penetrates sufficiently deeply into the component 8 from the lower side in Fig. 9, but does not emerge again on the other side, the upper side in Fig. 9. After the fastening screw 40 has been tightened, its head also rests on the free end of the end section 25 of the clamping sleeve 22, which forms an abutment, whereby an unintentional compression of this end section 25 is impossible. At the same time, the shoulders 17 and of the spacer 10 and the clamping sleeve 22 are in contact, so that the latter is arranged in the spacer 10 without significant axial play.

After tightening all fastening screws 40, cover caps 42 are inserted into the free ends of the passages 37, the outer surfaces of which are expediently flush with the surface of the element 33 and adapted to its outer surface.

are.

In addition, to further stabilize the shelf 7, the component 9 can be secured to the wall 6 using additional fastening screws. 5

The invention is not limited to the described embodiment, which can be modified in many ways. For example, it is possible to carry out the described pre-assembly on site instead of in the manufacturer's factory and/or to pre-assemble only the wardrobe rail 1, the spacers 10 and the clamping sleeves 22, while only screwing in the fastening screws 40 on site. Furthermore, instead of the described clamping sleeve 22, which mainly works via a snap connection, it would be possible to use one that is only arranged with a clamping or press fit in the spacer 10 and/or the element 33. Instead of the tubular element 33, a solid, rod-shaped element could also be used, in which case the passage 37 could be provided with an undercut, behind which the shoulder 27 of the clamping sleeve 22 engages. In addition, other than the circular cross-sections described can be selected for the various parts or their passages. Finally, it is clear that the device described can not only be used to fasten a plate- or wall-shaped component 8 to the tube- or rod-shaped element 33. Rather, it is possible to fasten the element 33 to an existing component 8, which can also be a wall, in particular a board wall, using the device described. This also has the advantage that extensive pre-assembly is possible and practically only the fastening screws need to be tightened on site.

Claims (11)

Expectations 1. Device for fastening a plate-shaped component (8) to a tubular or rod-shaped element (33) having a longitudinal axis (36), characterized in that it contains a first passage (37) arranged in the element (33) and transversely to its longitudinal axis (36), a spacer (10) having a second passage (12) to be arranged transversely to the longitudinal axis (36) of the element (33), a clamping sleeve (22) provided with a third passage (24), intended for connecting the element (33) to the spacer (10) and for this purpose insertable into the first and second passages (37, 12), and a fastening screw (40) intended for insertion into the third passage (24) and to be screwed into the component (8), wherein at least the element (33), the spacer (10) and the clamping sleeve (22) can be connected to one another to form a pre-assembled unit. 2. Device according to claim 1, characterized in that the fastening screw (40) can also be pre-assembled in the unit. 3. Device according to claim 1 or 2, characterized in that the spacer (10) has at one end of the second passage (12) a substantially flat end face (14) arranged transversely thereto and intended for contact with the component (8) and at the other end a end face (15) adapted to the outer contour of the element (33) and intended for contact with its outer surface. 4. Device according to one of claims 1 to 3, characterized in that the clamping sleeve (22) is slotted in an end section (25) to be inserted into the first passage (37). 5. Device according to claim 4, characterized in that the slotted end section (25) can be expanded by screwing in the fastening screw (40). 6. Device according to one of claims 1 to 5, characterized in that the clamping sleeve (22) is provided with snap-connection elements (27, 34) intended for interaction at an end section (25) to be inserted into the first passage (37) and the element (33) in the region of the first passage (37). 7. Device according to one of claims 1 to 6, characterized in that the clamping sleeve (22) can be inserted into the second passage (12) from the side remote from the element (33) and is provided with a shoulder (29) on an end section (28) coming to lie in the spacer (10) which is arranged on a (12) formed shoulder (17). 8. Device according to claim 7, characterized in that the shoulders (17, 29) are provided with anti-rotation elements (19, 30) intended for interaction. 9. Device according to one of claims 1 to 8, characterized in that it has a cover cap (42) which can be inserted into one end of the first passage (37) and has an outer surface which is adapted to the outer surface of the element (33) and which ends flush with this. 10. Pre-assembled structural unit consisting of the tubular or rod-shaped element (33), the spacer (10) and the clamping sleeve (22) according to one or more of claims 1 to 9. 11. Assembly according to claim 10, characterized in that the fastening screw (40) is partially screwed into the clamping sleeve (22).