EP1332702B1 - Stand for mounting bar-shaped parts - Google Patents

Abstract

The guide part for the flexible cable (12) comprises a guide block (13) fitted into a cavity in the wall of the mounting region (3) used to receive the e.g. tree. The guide block is in direct contact with the cable tensioning device (8) and the force generated in response to the tension force is transferred via the guide block to the stand foot (1). The stand is used to fix bar or rod-shaped articles into position and has a foot with a mounting region for receiving the end of the article, the mounting region being defined by a wall and having pivoting holder parts (7) distributed around a symmetry axis. The holder parts are pivotable between open and closed positions in planes which roughly intersect at the symmetry axis. A flexible cable in the form of an essentially closed loop extends through all the holder parts and is operated by a tensioning device in order to move the holder parts between the open and closed positions. At least one looped end of the cable is passed through the guide part in the outwards direction.

Description

The invention relates to a stand for clamping rod-shaped parts, in particular of Christmas trees, with a foot part, with a located on the foot part, formed by a wall contour receiving area for the attachment end of the rod-shaped part, with a plurality of arranged about an axis of symmetry holding elements, each between a Open position and a holding position in a plane are pivotally, wherein the planes intersect approximately in the axis of symmetry, with a clamping device that biases a tensile load on flexible and flexible connecting part, which is guided in the form of an approximately closed loop movable through all the holding elements and this at Actuating the clamping device pivoted from the open position to the holding position, and with a separate, provided on the foot part guide part, through which at least one end of the formed into a loop flexible connecting part from the region of the loop outward gef is, according to the preamble of claim 1.

A stand of this type is essentially known from DE-A-39 32 473 and DE-U-20105593. An essential feature of the known stand is that the flexible connection part, in practice a steel cable, is movably guided through openings in all holding elements. Upon actuation of the tensioning device, the connecting part slides in the openings of the holding elements, whereby they are pulled with a substantially equal holding force to the attachment end of the rod-shaped part. This is true even if this attachment end is not of strictly circular contour, as is the case for example with Christmas trees. The known stand has the advantageous property that the rod-shaped part is reliably clamped in the desired position by simply operating the clamping device. He has therefore found a wide spread as a Christmas tree stand.

The function of the known stand also depends on that in the form of an approximately closed loop movably guided by all holding elements rope as possible takes the form of a regular polygon. Therefore, the holding elements are pivotable in planes which are arranged symmetrically to the axis of symmetry of the stator. Exactly the contour of a regular polygon but can not be met, because the flexible connecting part must be connected at least at one end to the clamping device and is led out for this purpose from the region of the holding elements to the outside.

In DE 39 32 473 C2 also an embodiment is shown, in which a fastening end of the flexible connection part is fixed to the foot part of the stand, while the other attachment end is guided to the clamping device, which in turn on a bottom plate and on the receiving area for the fastening end is supported by the rod-shaped part.

The Christmas tree stand according to DE 201 05 005 U1, in contrast, shows an embodiment in which both ends of the flexible connecting part are guided together at one point between two holding elements to the outside and are connected there to the clamping device. The guide is an angle-shaped guide part, which rests on the foot. At a distance radially outward, the clamping device is provided, which may be a latching device. For the mutual arrangement and attachment of the guide member and the tensioning device to the foot part in DE 201 05 005 U 1 no information is given.

Thus, the rod-shaped parts are held securely, considerable clamping forces must be applied by the holding elements. Therefore, very high forces occur in the area of the clamping device, which lead to local voltage peaks in the housing. This applies in particular to the point at which the ends of the flexible connection part are guided out of the region of the holding elements and to the clamping device. Stands of this kind are made especially in the form of Christmas tree stands as mass products and are subject to strong price pressure in the market. For a safe operation, however, high quality materials are just because of the aforementioned voltage spikes required. This results in the conflicting demands that such a stand on the one hand cheap and easy to produce, but on the other hand must apply the required holding forces safely and without damage for years. This is especially true for use as a Christmas tree stand, because if the holding function fails, room and house fires can easily occur.

The invention therefore has the aim of creating a stand of the type mentioned, which ensures the required holding forces with long-term reliable operation and yet inexpensive and easy to manufacture and assemble.

This object is achieved according to the characterizing part of claim 1, characterized in that the guide member is inserted in a recess of the wall contour guide block which is in direct contact with the clamping device and over which the clamping force corresponding reaction force is transmitted from the clamping device to the foot part ,

According to the invention, thus, the guide member which serves to guide the flexible connection part, in the particularly highly stressed area of the wall contour, in which the tensile forces of the flexible connection part must be received, formed in the form of a guide block and inserted into a recess of the wall contour. As a result of this design, the guide pad absorbs the local stresses and applies them evenly to the foot part and the tensioning device. The guide block can therefore be made of a material that is more resilient than the material from which the rest of the foot part consists. This leads to particular advantages in the preferred production of such a stand made of plastic, because for the foot largely a plastic of normal quality is sufficient, while the guide block is a high-strength plastic part use, for example, of polyamide, polyester, polypropylene or the like. With or can exist without fiber reinforcement. However, the advantage of the stator according to the invention is not limited to a production of plastic. It can be achieved, for example, in a production of the foot part of a wood material, which is relieved by a guide block made of a metal.

By the guide member is formed in the form of a solid block, a stable design is possible, which is suitable for larger loads and allows reliable guidance of the flexible connection part. The arrangement of the guide block in a recess of the wall contour allows a reliable and uniform force transfer from the clamping device on the wall contour and thus on the foot of the stand. In addition, since the guide block is in direct contact with the clamping device, local overloading of the wall contour and the foot part are avoided. The guide block can be designed in such a way that it forwards the pressure forces directly acting on it, originating from the clamping device, uniformly and specifically to the wall contour and thus to the foot part. At the same time there is the possibility of easy installation. By namely the clamping device touches the guide block directly, both parts can be jointly supported and guided. The above-mentioned object of the invention is thus fully achieved. At the same time there is the advantageous effect that the reaction force of the clamping device corresponding to the clamping force is transmitted completely and specifically to the foot part of the stator via the guide block.

In the case of a foot made of plastic, it has proven to be expedient if the guide block consists of a polyamide, in particular glass fiber reinforced. This material is able to cope with all the stresses that occur in the present application. It can also be easily brought into any convenient form, so that, for example, fillets for wear-free guidance of the flexible connection part can be easily incorporated.

The advantage of the stator according to the invention is already given when only one end of the flexible connecting part is guided by the clamping device and connected thereto, while the other end is fastened in the region of the retaining elements on the foot part. However, it is preferred that both ends of the flexible connection part are guided by the guide block to the clamping device and connected thereto. The resulting relatively high local load in the area of the clamping device is perfectly transmitted by the guide block of the clamping device on the foot and vice versa. In this embodiment, it is achieved that the approximation of the rope shape to a uniform polygon is particularly complete. The flexible Connecting part then slides properly in the openings of the holding elements, and it is largely realized that they rest with the same clamping force on the attachment end of the rod-shaped part.

A particularly advantageous form of the guide for the flexible connection part is that the guide block has two holes and that each one of the holes is passed through one end of the flexible connection part. Although in principle a guide in open slots or grooves is possible, but the leadership in drilling ensures that the flexible connecting part can never escape unintentionally from the guide block.

If the stand according to the invention is provided with a circular wall contour which extends upwards from a bottom plate of the foot part, an advantageous embodiment is that the guide block is inserted from below into a wall opening of the annular wall contour in a recess forming the recess. The annular wall contour can be formed for example by special wall areas, which complement each other in the manner of a cylindrical open container to a circular ring shape. The pivot axes of the holding elements can be provided in gaps between the individual wall areas. If the guide block is inserted into one of these wall portions of the annular wall contour, it means that it is located directly in the region of the flexible connection part, without the need for additional material expenditure.

The requirement that the guide block should at the same time transmit the reaction force corresponding to the clamping force from the clamping device to the foot part, is achieved structurally most simply by the clamping device being adjacent to the guide block receiving region of the circular wall contour with respect to the axis of symmetry approximately radially outward is arranged pointing. In this case, forces can be transmitted between the guide block and the clamping device in the radial direction.

According to an additional development is achieved in a simple manner that the clamping device via the opening in the annular wall contour with the guide block in direct contact. For this purpose, the guide block is provided with an opening that passes through, applied to the clamping device and the power transmission serving projection. In this way, the power transmission between the guide block and the clamping device takes place very directly.

Furthermore, a second design according to the invention is proposed, which also assumes a receiving area in the form of a circular wall contour, which extends from a bottom plate of the foot part upwards. It is provided that the guide block is formed as part of the annular wall contour. The wall thicknesses of the annular wall contour and the guide block add up here, so that overall the wall areas of the annular wall contour can have a smaller wall thickness than in the first construction with the guide block inserted into a cavity of the wall area. In this case, however, a larger force transmission surface of the guide block is then required.

In an embodiment of this second construction according to the invention, it is therefore provided that the guide block has a reinforced middle part and two lateral wings, wherein the middle part has the area serving to guide the ends of the flexible connection part and is in contact with the tensioning device, while the side wings increase contact surfaces form the annular wall contour. In this way, the high forces resulting from the tensioning device are transferred over a large area to the foot part, so that local stress peaks in the less highly resilient material of the foot part are avoided.

A third embodiment according to the invention has a radially extending with respect to the axis of symmetry guide as a basis, wherein the guide block is inserted into the guide limited from the outside stop. This embodiment, together with other embodiments, allows the structure of the entire stator of individual modules, which can be combined in the manner of modules. The guide can be formed by trained on the wall contour, emanating from the receiving area and leading outward guide walls, which hold the guide block in the radial direction by means of ribs and grooves slidably. The ribs on the guide block are advantageous arranged and go with fillets in the side surfaces, wherein in the assembled state located between the ribs side wall portions of the guide block have a distance from the adjacent guide walls. As a result of this embodiment, the ribs are given in their transition region to the guide block some flexibility, which benefits not only the mountability, but also the durability. The ribs can have a rectangular or undercut, for example dovetail-shaped profile.

The previously mentioned details of the third embodiment allow easy mounting and a secure hold and a good force transfer to the guide block. However, the greatest advantage of this embodiment results only from a further embodiment, according to which the guide block is designed as a holder for the clamping device. As a result of this configuration, namely, the clamping device and the guide block can be assembled outside the stand and then used as a common unit in the stand.

The holder of the device on the guide block can for example take place in that the guide block is provided with a clamping device holding the holder and at least partially receiving recess. In this case, the recess in the guide block - based on its installed state - be radially outwardly and the foot part open and form a substantially parallel to the axis of symmetry guide, in which the clamping device is partially inserted stop limited by the foot part facing side.

In this case, the configuration may be such that between the housing of the clamping device and the walls of the recess there is a rib / groove profiling, which allows a sliding of the housing in a direction parallel to the axis of symmetry, however, prevents migration radially to the axis of symmetry.

The push-in movement of the clamping device in the guide block limiting stop is advantageously formed according to a further embodiment by the inner wall of serving as a cable guide upper portion of the guide block, which in the built-in State of the guide block projects beyond the receiving area of the stand upwards.

As a result of the latter structural measures, the insertion directions of the guide block in the stand on the one hand and the clamping device in the guide block on the other hand run perpendicular to each other. In conjunction with the intended limit stops this leads to the fact that the two parts to be installed, namely guide block and clamping device, effectively block each other and can not solve themselves in operation. At the same time this construction allows mounting without additional fasteners such as screws, splices or the like.

For this purpose, it is provided as a further advantageous embodiment that the backup of the clamping device used in the guide block is carried out against displacement in the direction of the foot part by at least one cam formed on the stand, which is in the guide block in the sliding path of the clamping device within the guide block.

Furthermore, it is advantageously provided that the insertion movement of the guide block inwardly towards the axis of symmetry limiting stop is formed by the receiving area of the foot part. The recording area can z. B. be formed by a circumferential wall enclosing a water tank. At this circumferential wall of the guide block during radial insertion can abut inwardly, whereby a stop limiting its insertion movement is formed.

Finally, only care must be taken to ensure that the guide block can not migrate radially outward during operation, whereby it would take the clamping device with it. For this purpose, the existing in such stands anyway hood, which covers the foot part upwards, advantageously used. Such a hood is provided with functional openings through which the rod-shaped part can be inserted into the stand, but which are also required for the clamping lever and the holding elements. It is therefore in such a stand, which is equipped with a foot covering the covered, provided with function openings hood, formed on this hood at least one stop, the at attached hood cooperates with the guide block and prevents its displacement in a direction radially outward.

The principle of the modular design and the assembly, which is clearly expressed in all its embodiments in the third embodiment, solely by joining without special fastening means, can also be extended to other components. For example, a configuration is possible, according to which the guide block guiding walls at the same time serve as an axial securing an axis formed as Durchsteckachse the clamping device, which belongs to a flexible connecting part winding drum and / or a clamping lever. According to this embodiment, the through-axis of the clamping device need not be axially fixed to this itself. After joining the entire stand, the axis is axially reliably secured and held. This makes it possible to mount even the clamping device alone by joining and without further fastening means.

The principle pursued here can be further complemented by the fact that the holding elements are attached solely by the foot of the stand, that they are fastened together with their pivot pin or the like as ready-to-assemble assemblies in the receiving area of the foot part, with a backup against lifting alone by placing the hood is possible. This design option is described otherwise in the German patent application DE-A-101 63 338 of the same applicant.

Figur 1

dient der Erläuterung der Funktion des erfindungsgemäßen Ständers in Form einer Draufsicht auf das Fußteil von oben.

Figur 2

zeigt einen Teilschnitt längs der Linie A - A gemäß Figur 1 und gibt eine erste erfindungsgemäße Ausführungsform wieder.

Figur 3

ist eine räumliche Darstellung einer zweiten erfindungsgemäßen Bauform, bei der der Führungsklotz von außen radial in den Aufnahmebereich des Fußteils eingesetzt wird.

Figur 4

zeigt eine der Figur 3 entsprechende Darstellung, wobei der Führungsklotz vollständig in die Ausnehmung der kreisringförmigen Wandkontur eingesetzt ist.

Figur 5

ist eine räumliche Darstellung einer dritten Ausführung des erfindungsgemäßen Ständers, wobei auch die zugehörige, von oben auf das Fußteil aufzusetzende Haube dargestellt ist.

Figur 6

ist eine Darstellung allein des Fußteils ohne weitere Einbauteile zu der Ausführungsform gemäß der Figur 5.

In Figur 7

ist eine Einzelheit der Figur 6 vergrößert dargestellt, wobei jedoch gegenüber der Figur 6 einzelne Abwandlungen vorgenommen wurden.

Figur 8

zeigt eine vergrößerte Darstellung des Führungsklotzes zu der dritten Ausführungsform gemäß den Figuren 5 bis 7.

Figur 9

ist eine der Figur 8 entsprechende Darstellung aus einem anderen Blickwinkel.

Figur 10

veranschaulicht die Spanneinrichtung, die zum Einbau in den erfindungsgemäßen Ständer gemäß den Figuren 5 bis 7 bestimmt ist.

In Figur 11

ist ein Schnitt durch den Ständer gemäß der dritten Ausführungsform im zusammengebauten Zustand gezeigt, wobei der Schnitt sich radial durch den Bereich der Spanneinrichtung erstreckt.

Figur 12

enthält ebenfalls eine Schnittdarstellung durch die fertig montierte vierte Ausführungsform, wobei die Schnittlinie aber quer durch den Führungsklotz und senkrecht zu seiner Einschubrichtung gewählt ist.

The invention will be explained in more detail later on embodiments, which are illustrated in the figures. The figures show the following:

FIG. 1

serves to explain the function of the stator according to the invention in the form of a plan view of the foot part from above.

FIG. 2

shows a partial section along the line A - A of Figure 1 and is a first embodiment of the invention again.

FIG. 3

is a perspective view of a second design according to the invention, in which the guide block is radially inserted from the outside into the receiving area of the foot part.

FIG. 4

shows a representation corresponding to Figure 3, wherein the guide block is fully inserted into the recess of the annular wall contour.

FIG. 5

is a perspective view of a third embodiment of the stator according to the invention, wherein the associated, aufzusetzende from above on the footer hood is shown.

FIG. 6

is an illustration alone of the foot without further fittings to the embodiment of Figure 5.

In FIG. 7

a detail of Figure 6 is shown enlarged, but with respect to the figure 6 individual modifications were made.

FIG. 8

shows an enlarged view of the guide block to the third embodiment according to the figures 5-7.

FIG. 9

is a representation corresponding to Figure 8 from a different angle.

FIG. 10

illustrates the clamping device, which is intended for installation in the stator according to the invention according to the figures 5-7.

In FIG. 11

a section through the stator according to the third embodiment is shown in the assembled state, wherein the section extends radially through the region of the clamping device.

FIG. 12

also includes a sectional view through the assembled final fourth embodiment, but the cutting line is selected across the guide block and perpendicular to its insertion direction.

In the illustration of the first design according to the invention according to FIGS. 1 and 2, the foot part 1 of a stand according to the invention consists of a base plate 2, which is provided with a receiving region 3. The receiving area 3 has the shape of an annular wall contour, in the simplest embodiment, a container with a wall in the form of a cylindrical ring.

In the illustrated embodiment, however, the annular wall contour is formed by individual wall portions 4. In the gaps between the individual wall areas retaining elements 7 are arranged pivotably. They move in pivoting planes, all of which point symmetrically to an axis of symmetry 6. The axis of symmetry 6 is located in the axial extension of a Aufsteckdorns 5, which serves for the first fixing and radial adjustment of rod-shaped parts, which consist for example of wood. The symmetry axis is aligned perpendicular to the plane of the bottom plate 2.

At the foot part is a clamping device 8, which is actuated by means of a clamping lever 9. The tensioning lever 9 may be formed, for example, as a foot pedal. The tensioning lever 9 is connected to a drum 10 in connection, which serves for winding and thus tensioning a flexible connecting part 12. The tensioning device may be a winch or ratchet and is assumed to be technically usual in their design and therefore not described in detail. It is located in a separate housing 11 and is installed as a whole in the foot part.

In practice, the flexible connecting part 12 is a steel cable which is movably guided through bores located in the holding elements 7. When pressing the clamping device 8, the flexible connecting part 12 pulls the holding elements 7 from an open position in which the rod-shaped part can be easily placed from above into the receiving area 3, first in a Anlege- and then in a holding or clamping position, as a result of special rope guide abut all holding elements with substantially the same holding force at the attachment end of the rod-shaped part. The details of such a clamping device are described for example in DE 39 32 473 C2 and shown, so that reference may be made to this document. In Figures 1 and 2, the clamping elements are shown in their holding position.

For the function of such a stand, it is advantageous if the flexible connecting part in the view from above as possible has the shape of a regular polygon, which lies in a horizontal plane. This desirable form is largely due to the fact that, as shown in FIG. 1, the ends of the flexible connection part are guided together at one point in the region of the holding elements and radially outward to the clamping device 8. In the illustration according to FIG. 1, these are the first end 14 and the second end 15 of the flexible connecting part 12. In FIG. 1, the polygonal shape of the connecting part is shown in simplified form as a circular ring.

Obviously, at the point at which the two ends 14, 15 of the flexible connection part 12 are brought together and connected to the tensioning device 8, a considerable load will occur.

Therefore, a special guide block 13 is provided at this point. While the entire foot can be made of a conventional, not so expensive plastic, the production of a high-strength plastic is provided for the guide block. In practice, a glass fiber reinforced polyamide has proven particularly useful. The guide block 13 has an upper area in which the two ends 14, 15 of the flexible connection part 12 are guided by means of two bores. The holes can be rounded laterally and otherwise adapted to the desired guidance of the flexible connection part, so that it does not wear out unnecessarily.

The illustrated construction of the guide block 13 combines an economical use of a high-quality plastic with maximum static reliability.

FIG. 2 shows that the guide block 13 is in direct connection with the tensioning device 8, ie without the interposition of a material layer belonging to the wall region 4. For this purpose, the guide block 13 according to FIG. 6 has a projection 26 which projects through an opening 25 in the wall region 4 and directly the housing 11 of the clamping device 8 is touched. In this way, the risk is avoided that an excessive surface pressure is exerted on the material of the wall portion 4 in the region of the small end face of the clamping device.

A second construction of a stator according to the invention can be seen in FIGS. 3 and 4. Here, a foot part 31 is provided with a bottom plate 32 and a receiving portion 33. The receiving region is formed from individual wall regions 34, which together form an annular wall contour 41. In the gaps between the individual wall regions 34, the holding elements, not shown here are arranged again. 35 with the usual arbor is referred to, extending in the extension perpendicular to the bottom plate 32 which determines the pivoting planes of the holding elements symmetry axis.

The guide block 36 here has a reinforced middle part 37 and two laterally attached wings 38, which form magnifying contact surfaces. In one of the wall portions 34 is a recess 42. It is made radially from the outside in the form of a wide groove in the associated wall portion 34, so that only a relatively small layer of the material thickness of the wall portion remains. In this recess 42 of the guide block 36 is used, wherein the rear sides of the central part 37 and the wings 38 form a substantial bearing surface. Thus, the wall thicknesses of the material left over from the wall region 34 and the wall thicknesses of the middle part and the wings of the guide block 36 add up.

With 40 again a projection on the middle part 37 of the guide pad 36 is designated. With the relatively small front surface of the projection 40 of the guide block abuts the associated, not shown here clamping device. The force initially acting on the small end face of the projection 40 is distributed evenly over the entire circumferential extent of the associated wall portion 34 and is thus transferred gently and while avoiding load peaks on the foot part.

The guide block 36 can be glued to the associated wall portion 34, for example. The middle part 37 again has an upper portion 39, in which the ends of the flexible connection part are guided reliably and gentle on the material.

FIGS. 5 to 12 show a third embodiment of the stator according to the invention with various details. It is omitted because of the clarity in all figures, the flexible connection part. The leadership of the flexible connection part is also in this embodiment according to the invention in accordance with the previously presented variants and therefore requires no re-presentation.

As can be seen from FIG. 5, the stand here also has a foot part 51 with a bottom plate 52, from which a receiving area 53 extends upwards. The receiving area 53 here has the form of a circumferential wall 54, which may for example enclose a water tank. FIG. 5 also shows the arbor 55, in the extension of which the symmetry axis 56 which is decisive for the stator is located. For better clarity, this symmetry axis 56 is also shown in FIG. 6. Around the receiving area 53, the holding elements 57 are pivotally mounted, which can be pulled by the known flexible connecting part inwardly into its holding position in which they clamp the rod-shaped part between them.

To clamp the flexible connection part, the tensioning device 58 is also used here, from which the tensioning lever 59, an insertion axis 60 and the housing 61 can be seen in FIG. The through-axis 60 supports the tensioning lever 59 and can also serve as a drum for winding the flexible connection part.

With 63 here the guide block is referred to, which is shown in Figures 8 and 9 in more detail. The guide block 63 has a first bore 66 and a second bore 67 for guiding the flexible connection part. The two bores 66 and 67 are arranged in the upper region 68 of the guide block.

A hood 69 serves to cover the foot part 51 with all its built-in parts. The hood 69 has a function opening 70 for the clamping lever, a further functional opening 71 for the rod-shaped part and four functional openings 72 in which the pivotable holding elements can move. The hood can be connected to the foot part with conventional connecting elements, for example by a snap connection, not shown.

At the foot part of a guide 73 is formed. It can be seen better in FIGS. 6 and 7 and is formed by the guide walls 74 and 75 according to the representation selected here. The guide walls are integrally formed with the circumferential wall 54 and the bottom plate 52 and thereby a particularly stable part of the foot 51st

At the mutually facing inner sides of the guide walls 74 and 75 three grooves 76 are formed. The grooves may have a rectangular (FIG. 6) or an undercut (FIG. 7) cross-section, for example a dovetail shape. They run over the entire approximately radially to the axis of symmetry 56 extending length of the guide walls 74 and 75th

The grooves 76 correspond to ribs 78 or 79, which may be formed on the guide block 63. This can be seen particularly well from Figures 8 and 9, which show the guide block in an enlarged view. To insert the guide block into the foot part of the stand, the ribs 78 or 79 are inserted into the grooves 76. This insertion movement finds an end that the peripheral wall 54 acts as a stop for the guide block 63.

FIGS. 8 and 9 furthermore clearly show a recess 80, which is open radially outward and, with respect to the operating position of the assembled stand, is also open downwards. As shown particularly clearly in FIG. 9, the recess 80 is widened in its width toward the front end of the guide block and thereby forms two grooves 81.

FIG. 10 shows the illustration of the ready-to-install clamping device 58. Significantly, the housing 61, the clamping lever 59 and the through-axis 60 can be seen, which serves as a drum for winding the flexible connection part and at the same time supports the clamping lever 59 pivotally. At the front of the housing 61, which in the assembled state is directed inwardly toward the axis of symmetry 56, two guide ribs 82 are provided, which are adapted to the guide grooves 81 in the guide block 63.

For assembly, the clamping device is inserted from the lower side of the guide block forth in the recess 80, which is also adapted exactly to the dimensions of the housing 61 of the clamping device 58. In this case, the guide ribs 82 located on the housing 61 are received by the guide grooves 81 in the guide block 63. Guide block and clamping device are pushed into each other until the housing 61 abuts up against the inside of the upper portion 68 of the guide pad 63. This condition can be clearly seen in FIG. Only after assembly of guide block and clamping device, the assembly thus formed is introduced in the radial direction between the guide walls 74 and 75 in the foot part 51 of the stator. In this case, the ribs 78 or 79 located on the guide block 63 are received by the grooves 76 formed in the guide walls 74 and 75. This radial insertion movement is completed as soon as the guide block 63 abuts with its front side on the circumferential wall 54 of the receiving region 53, which can also be clearly seen from FIG.

Figure 12 shows a corresponding representation in a direction perpendicular to this cutting direction, which is perpendicular to the insertion movement of the guide block.

FIGS. 6 and 7 furthermore show hitherto not mentioned cams 77, wherein in FIG. 6 an embodiment with a single cam is selected, whereas in FIG. 7 an embodiment with two cams 77 is selected. These cams block the clamping device within the guide block 63 against an automatic undesired downward movement as soon as the guide block is completely inserted in the radial direction between the guide walls 74 and 75. This becomes clear from FIG. 11. Can be seen the housing 61 no longer emigrate down with inserted guide block, because now the or the cam 77 are in the way. So that the goal of complete blocking of the nested parts is achieved, now the guide block on an automatic emigration must be prevented radially outward in operation. For this purpose, the stop 83 on the hood 69, which is shown in FIGS. 5, 11 and 12, is designated. Once the hood 69 is placed on the foot part 51, the stop engages behind the upper portion 68 of the guide block 63, so that the guide block is now enclosed in the radial direction between the stop 83 and the likewise serving as a stop circumferential wall 54.

The manner of assembling the stator according to the third embodiment described here has various advantages. Firstly, the parts are successively assembled without tools and without additional fasteners such as screws or the like and remain reliably blocked and locked after completion of the assembly. This contributes to the fact that the insertion directions of the clamping device in the guide block on the one hand and the guide block in the foot of the stand on the other hand are perpendicular to each other and that this type of assembly is supplemented by the mentioned cams and stops.

In addition, the embodiment according to FIGS. 5 to 11 makes it possible in a particularly advantageous manner to produce and assemble individual modules according to the module technology. So z. B. foot, guide block and clamping device produced at various points, prefabricated and only recently, in addition, in different combinations, are joined together. For example, different foot parts with different clamping devices and the like can be combined, without in detail larger structural deviations are required.

The type of modular assembly described here may be extended. Thus, Figures 5 and 6 clearly show that the holding elements 57 can be pivotally mounted by means of pivot pins 85 on support and bearing walls 84, which - similar to the guide walls 74 and 75 - go out from the circumferential wall 54 and with this and with the Bottom plate 52 are permanently connected. These retaining elements can also by means of their support bolts also alone positively or cohesively, ie without additional fasteners to permanently connect to the receiving area 53. A lifting of the holding elements upwards can also be prevented by stops located on the hood. In the German patent application 101 63 388.6 incidentally is already described in detail how such attachment of the holding elements on the stand can be made in detail.

An economical way of mounting may be to assemble the retaining elements, the flexible connecting part and the clamping device to a loosely connected assembly at a first mounting location. Only in the final assembly then the retaining elements and the guide block are inserted into the foot part, which is easily possible despite the already existing connection via the flexible connecting part. In this way, the individual assembly steps of specialized trained forces can be made, whereby a special economy is achieved.

The type of assembly described here can also be transferred to the clamping device 58. As already mentioned, the axis for the tensioning lever 59, which can also be the drum for winding up the flexible connection part, is designed as a push-through axis 60 which is not fixed to the tensioning device itself. By not graphically represented possibility to extend the guide walls 74 and 75 into the region of the through-axis 60 radially outward, there is a reliable locking of the through-axis 60 in its axial direction; because after assembly, the through-axis 60 would be securely held on both sides in such an embodiment. This opens the possibility to mount the clamping device alone by joining, without screws, circlips or the like are additionally required.

With regard to the located on the guide block 63 ribs 78 or 79 there is an advantageous, not graphically illustrated embodiment possibility that the ribs pass with fillets in the adjacent side surfaces of the guide block. In this case, the design can be made such that in the assembled state, a distance or gap between the side wall portions of the guide block in the adjacent Guide walls is formed. This design leads to improved elasticity of the ribs in their connection area to the guide block, which considerably improves the load capacity and service life of this heavily stressed connection.

List of reference numbers

1

footboard

2

baseplate

3

reception area

4

wall area

5

creel

6

axis of symmetry

7

retaining element

8th

tensioning device

9

clamping lever

10

drum

11

casing

12

Flexible connection part

13

guide block

14

First end of the connecting part

15

Second end of the connecting part

25

opening

26

head Start

31

footboard

32

baseplate

33

reception area

34

wall area

35

creel

36

guide block

37

midsection

38

wing

39

guide region

40

head Start

41

wall contour

42

recess

51

footboard

52

baseplate

53

reception area

54

circumferential wall

55

creel

56

axis of symmetry

57

holding member

58

tensioning device

59

clamping lever

60

By floating axle

61

casing

63

guide block

66

first hole in the guide block

67

second hole in the guide block

68

Upper area of the guide block

69

Hood

70

Function opening for the clamping lever

71

Function opening for the rod-shaped part

72

Function opening for holding element

73

guide

74

guide wall

75

guide wall

76

groove

77

cam

78

Ribs, rectangular cross-section

79

Ribs, undercut cross section

80

recess

81

Guide groove for clamping device

82

guide rib

83

attack

84

Support and storage wall

85

pivot pin

Claims (23)

1. A stand for mounting bar-shaped parts, in particular Christmas trees, comprising: a bottom part (1, 31, 51), and a locating portion, provided on said bottom part and constituted by a contoured wall (41), for receiving therein the end of the bar-shaped part to be mounted, a plurality of holding elements which are arranged around an axis of symmetry and which are each capable of being swivelled between an open position and a holding position in a plane, said swivelling planes approximately intersecting in the axis of symmetry, tightening means (8, 58) for tightening a tensile-loadable and flexible connecting element (12) which is movably guided through all the holding elements in the form of an almost closed loop, and which - following actuation of said tightening means - will cause said holding elements to swivel from an open position into a closed position, and a separate guiding element which is provided on said bottom part and through which at least one end of said flexible connecting element arranged in the form of a loop is guided from the region of the loop towards the exterior characterized in that said guiding element is a guiding block (13, 36, 63) which is fitted in a recess (42) of said contoured wall (41) and directly contacts said tightening means (8, 58), which block serves to transfer the reaction force corresponding to the tension force from said tightening means (8, 58) to said bottom part (1, 13, 51).
2. The stand of claim 1 including a plastic bottom part (1, 31) characterized in that said guiding block (13, 36, 63) is made of a polyamide, in particular of the glass-fibre reinforced type.
3. The stand of claims 1 or 2 characterized in that both ends (14, 15) of said flexible connecting element (12) are guided through said guiding block (13, 36, 63) to said tightening means (8, 58) and are connected thereto.
4. The stand of claim 3 characterized in that said guiding block (13, 36, 63) includes two bores (66, 68), and that either end (14, 15) of said flexible connecting element (12) is guided through a respective one of said bores (66, 68).
5. The stand of claim 4 including a contoured annular wall which extends upwards from a base plate (2) of said bottom part (1) characterized in that said guiding block (13) is inserted from below into an opening (25) provided in a wall portion (4) of said contoured annular wall, which opening (25) constitutes said recess.
6. The stand of claim 5 characterized in that said tightening means (8) is arranged adjacent the wall portion (4) of the annular contoured wall which accommodates said guiding block (13) in a manner so as to face away from said axis of symmetry (6) towards the exterior in an approximately radial direction.
7. The stand of claim 6 characterized in that said guiding block (13) is provided with a projection (26) that reaches through said opening, rests on said tightening means (8) and serves for the transmission of a force.
8. The stand of one of claims 3 or 4 including an annular contoured wall (41) which extends upwards from a base plate (32) of said bottom part (31) characterized in that said guiding block (36) is formed as part of said annular contoured wall (41).
9. The stand of claim 8 characterized in that said guiding block (36) is fitted into a recess (42) of said annular contoured wall (41) in a radial direction from the outside, with respect to said axis of symmetry (6), and is adapted thereto.
10. The stand of claim 9 characterized in that said guiding block (36) has a reinforced central portion (37) as well as two lateral wings (38), which central portion (37) includes the region (39) for guiding the ends of said flexible connecting element and contacts said tightening means, whereas said wings (38) constitute enlarging bearing surfaces for contacting said annular contoured wall (41).
11. The stand of one of claims 1 to 4 characterized by a guide (73) which extends in a radial direction with respect to said axis of symmetry (56) and into which said guiding block (63) is inserted from the outside, limited in its movement by a stop.
12. The stand of claim 11 characterized in that said guide (73) is formed by guiding walls (74, 75) formed on said contoured wall, starting from said locating portion (53) and extending toward the outside, which guiding walls (74, 75) slidably support said guiding block (63) in a radial direction by means of ribs (78, 79) and grooves (76).
13. The stand of claim 12 characterized in that said ribs are provided on said guiding block and verge with rounded portions in its lateral surfaces, wherein, in the mounted state, the side wall portions of said guiding block disposed between said ribs will be spaced from the adjacent guiding walls.
14. The stand of claim 12 or 13 characterized in that said ribs (78, 79) are of a rectangular or undercut profile section, in particular a dovetail profile section.
15. The stand of one of claims 11 to 14 characterized in that said guiding block (13) is formed as a support for said tightening means (58).
16. The stand of claim 15 characterized in that said guiding block (13) is provided with a recess (80) that supports and at least partially accommodates said tightening means (58).
17. The stand of claim 16 characterized in that the recess (80) in said guiding block (63) - in an inserted state thereof - is open in a radial direction towards the outside as well as towards said bottom part (51) and constitutes a guide which extends substantially in parallel to the axis of symmetry (56), into which a portion of said tightening means (58) is inserted from the side facing said bottom part (51), limited in its movement by a stop.
18. The stand of claim 17 characterized in that said housing (61) of said tightening means (58) and the walls of said recess (80) are profiled in the form of ribs and/or grooves (82, 81), respectively, which enables the housing (61) to slide in a direction parallel to the axis of symmetry (56), at the same time preventing it from being dislocated in a radial direction with respect to said axis of symmetry (56).
19. The stand of claim 17 or 18 characterized in that the stop which limits the insertion movement of the tightening means (58) into said guiding block (63) is formed by the inner wall of an upper portion (68) of said guiding block (63) which serves as a rope guide, which portion (68) will project vertically beyond the locating portion (53) of said stand after said guiding block (63) has been inserted.
20. The stand of one of claims 17 to 19 characterized in that said tightening means (58) inserted in said guiding block (63) is secured against being displaced in a direction towards the bottom part (51) by at least one cam (77) formed on said stand, which cam -with the guiding block (63) in place - will be in the displacement path of the tightening means (58) located within said guiding block (63).
21. The stand of one of claims 11 to 20 characterized in that the stop limiting the movement of insertion of said guiding block (63) towards the interior in a direction towards the axis of symmetry is constituted by the locating portion (53) of said bottom part (51).
22. The stand of one of claims 11 to 21 including a hood-shaped cover (69) which fully covers said bottom part (51) and is provided with functional apertures (70, 71, 72) characterized by at least one stop (83) formed on said cover (69) which will cooperate with said guiding block (63) when the cover (69) is in place, thus preventing said block (63) from being displaced outwardly in a radial direction.
23. The stand of one of claims 12 to 21 characterized in that said guiding walls at the same time serve to axially secure a shaft of said tightening means (58) in the form of a hollow shaft (60) which is part of a drum for winding up the flexible connecting element thereon and/or of a tightening lever (59).

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