A CONSTRUCTIONAL BUILDING SET

Abstract: A constructional building set includes, as its basic elements, a plurality of linking units (5) and a plurality of clamping members (1, 2). Each linking unit includes at least one connecting rod (6) having a generally ball-shaped head (7, 8) at each end. The clamping members match with each other in pairs, and by clamping such pairs about head portions of respective linking units, a large variety and number of assemblies or articles can be built. The head portions are retained in recesses (3) in the clamping members (1, 2) which can be urged more or less tightly towards each other by means of suitable tightening means (4, 9). Assemblies or articles built in this manner can be movable, or be changed or modified just by loosening some of the tightening means and after such changes, the assemblies can be made stable or rigid again by tightening the loosened tightening means.

Description: Title: A constructional building set The present invention relates to building sets in general, and in particular to an improved constructional building set of the type comprising as its basic elements a plurality of linking units, each linking unit compris¬ ing at least one connecting rod having a generally ball- shaped head portion disposed at each end thereof, and a plurality of coupling members for coupling together link- ing units by use of said head portions thereof. Various building sets have been proposed, for example as construction toys or engineering models or for use in constructing true articles or objects for everyday use such as furnitures. It is, however, a common feature to many prior building sets that the number of structures or assemblies which can be constructed are rather limited compared to the number of basic elements of the bulding sets. Moreover, a stable or rigid structure, which has previously been built, cannot be changed without dis- • assembling the structure completely or partially, or can only be changed to a limited extent. US patent No. 3,747,261 discloses a ball- and -socket joint for joining members together, in particular in constructing toys. The joint comprises a pair of balls, each having four flat spots lying in the same plane and spaced 90° from each other. A shaft or rod de- tachably interconnects the two balls and a generally spherically-shaped open socket is provided in a surface of each member to be joined. The or each socket is sized to snugly receive more than- one half of the surface of a ball. Such "undercut" sockets are, however, difficult to prepare in the surface of any member, and other struc- tural features of the joint, such as various members which must fit snugly into each other, will also render the joint difficult and expensive to manufacture. Due to its structure and design, the joint is, more over, limited to joining of polyhedral members, whereby the number of stable assemblies, which can be construct¬ ed, becomes restricted. US patent No. 3,822,499 also relates to a building set which includes detachable linking units consisting o a cylindrical body portion interconnecting rounded sphe¬ rical end pieces or head portions. Again, the number of stable assemblies, which can be constructed, is limited-, because of the shape and design of the coupling means used which is cube-shaped plastic foam blocks. On the above background, it is an object of the pre sent invention to provide an improved constructional building set of the type here contemplated and as stated in the opening paragraph, the building set being easy an inexpensive to manufacture and the set providing numerou possibilities of assembling stable structures. Another object is to provide a constructional build ing set useful not only as construction toys, but also for the construction of articles for everyday use. These' and other objects and advantages of the in¬ vention are attained by the characteristic features of the building set consisting in that the coupling members are clamping members having tightening means for urging pair of clamping members toward each other about head portions of linking units with said head portions being retained in a manner known per se in respective recesses formed in at least one surface of said clamping members, said head portions of said linking units having such a * size that, when inserted in and between registering re¬ cesses of two juxtaposed clamping members being urged together, they hold said two clamping members in spaced apart relation to each other. A large varity and number of structures or articles can be built by use of very few basic elements and such, structures or articles can, moreover, be made movable or changeable in a very simple manner as desired or needed and without disassembling the structure. Thus, the utili¬ ty of the improved building set becomes considerably in¬ creased due to the fact that the couplings in a particu¬ lar structure can be made movable or more or less rigid depending on how tight the individual pairs of clamping members in the structure have been clamped about the head portion of the linking units associated therewith. Moreover, an assembly built by means of the improved set may easily be modified or adapted in view of various external conditions such as the available space just by untightening the tightening means of one or more pairs of clamping members in the assembly which, thereafter, can be changed or modified considerably. After such changes, the untightened tightening means can be retightened whereby the assembly can be made stable or rigid in its modified configuration. The clamping members of the improved building set can have various shapes and designs. Thus the clamping members may be bars or plates, the term "plate" being understood in its broadest sense which does not imply • that the members must necessarily have a uniform thick¬ ness. Thus, for example, spherical segments or spherical and other spatial shells can be used as clamping members. Moreover, the clamping members can be hollow profiles or, for examples, U-profiles. In such profiles, the recesses for the head portions of the linking units can be made by locally deforming the profile walls. Various preferred embodiments and advantageous aspects of the improved constructional building set and elements being a part thereof will now be described, re¬ ference being made to the drawings wherein Figure 1 is a view partially in section and illu¬ strating the design of certain basic elements of the building set according to the invention and also illu- strating the basic principle when using the building set, Figure 2 is a perspective view illustrating certain possibilities of movements in a simple structure built by O PI . means of the set of the invention, Figure 3a a plan view showing three bar-shaped clamping members with associated linking units and space balls inserted in respective recesses therein, Figure 3b is a plan view of the elements of Figure 3a being covered by corresponding or matching elements t complete the assembly, Figure 3c a plan view illustrating certain possibi¬ lities of movements in the assembly of Figure 3b, Figure 4a is a plan view illustrating a series of further bar-shaped and plate-shaped clamping members hav ing linking units and spacer balls inserted therein and being sized in accordance with a modular system, Figure 4b is a plan view of a series of clamping members matching with the members of Figure 4a, Figure 4c is a plan view of the series of Figures 4 and 4b in assembled condition and with certain units being moved in various ways relative to each other, Figure 5b is a plan view showing two plate-shaped clamping members with linking units and spacer balls in¬ serted therein, Figure 5b is a plan view showing the members of Fi¬ gure 5a covered by matching members to form a particu¬ larly rigid assembly, Figures 6-8 are respective plan views illustrating various building or assembling possibilities when using further developed linking units which may be included in a building set of the invention, Figure 9 is a perspective view showing another par- ticular type of linking unit which may be included in th building set of the invention, Figures 10-18 are respective perspective views illu strating various examples of possible uses of the build¬ ing set. Referring now to the drawings, Figure 1 thereof il¬ lustrates the basic principle of the constructional building set of the invention. The basic elements of the O building set are, as shown, clamping members 1 and 2 -and linking units 5. The clamping member can be generally bar-shaped or plate-shaped and each member has recesses 3 at least in one surface thereof. The recesses 3 should be arranged and shaped so that each recess in a first member 1 can be disposed to re¬ gister a corresponding recess 3 in another member 2 when the two members are juxtaposed surface-to-surface as shown in Figure 1. The recesses should in other words be placeable two by two on a common axis 10. Obviously, this could be attained by designing the clamping members in matching pairs of members belonging together, but in or¬ der to simplify the use of the building set, it is pre¬ ferable that members of the same type are identical and have the recesses 3 therein arranged symmetrically about two orthogonal main axes for each member. Each member 1 can thereby be matched with any other member 2 of the same type and thereby it is not necessary to pick out particular members in order to be able to make assemblies as that of Figure 1 made of members 1 and 2. The recesses 3 may have -various shapes, the main thing being that they shall be able to retain and centre a head portion 7 or 8 of a linking unit 5 which will be described in the following, at an axis 10 which, upon mathcing to clamping members, is common to opposed re¬ cesses 3. Thus, the recesses can be rotary-symmetrical about the axis 10, but recesses having an inner surface shaped as a part of a spherical surface or as a conical- surface are preferable. As shown in Figure 1 and as mentioned above, the re¬ cesses 3 are used to retain and centre generally ball- shaped head portions of linking units 5. A basic type of such linking units comprises a connecting rod 6 prefe¬ rably being cylindrical in shape, and respective head portions 7, 8 disposed at each end of the connecting rod. By use of such linking units 5, pairs of matching clamping members 1 and 2 can be coupled together when OMPI _ t IPO juxtaposed as illustrated in Figure 1 and by tightening a screw or bolt 9 extending through appropriate openings ' 4 in the clamping members and preferably having counter¬ sunk screw or bolt heads. Figure 2 illustrates certain possibilities of move¬ ments in such an assembly. Thus, the pairs of clamping members can pivot relative to each other in a plane, for example as shown in the left part of Figure 2. Moreover, each pair of clamping members can swivel or rotated about the longitudinal axis of the pair, for example as shown in the right part of Figure 2. Thus, an assembly as that shown in Figure 2 will be very suitable for use as sup¬ porting means for lamps such as table lamps or wall lamps and the lamp fitting and lamp socket of such lamps can be mounted on the free head portion 8 shown in Figure 2 which could be specifically adapted and designed for that purpose. Similarly, the opposite outer pair of clamping members to the left in Figure 2 could be particularly de¬ signed for attachment to or suspension on a wall surface. The outer linking unit 5' shown to the left in Fi¬ gure 1 could be replaced by a separate spacer ball 5" belonging to the building set and having generally the same shape and size as the head portions 7 and 8. The linking unit 5' could, furthermore, be provided with va- rious particular means such as a mounting plate. In accordance with the invention the head portions 7 and 8 can appropriately be provided with at least one pair of diametrically opposed flat surface areas. There¬ by, and in connection with recesses 3 having a flat bot «- torn surface, at least one position can be obtained in which the joint between two pairs of clamping members is particularly rigid, namely a position in which the flat surface areas contact the corresponding flat bottoms of the respective recesses. Thus, in a particular embodi- ment, each head portion can have a shape similar to a . dodecahedron, thereby obtaining rather many possibilities of such particularly rigid joining positions. Figures 3a and 3b illustrate the elements in an • as¬ sembly similar to that shown in Figure 2, whereas Figure 3c illustrates how such an assembly can be completely folded together which is very useful, for example in con- nection with a support arm for a lamp. Figure 3c also indicates how one pair of clamping members can be and has been rotated about a longitudinal axis relative to adja¬ cent pairs of clamping members in the assembly. The clamping members in the building set of the in- vention can have several different plate- like or bar -like shapes or configurations. Preferably, however, shapes are used which are symmetrical about two main axes which are at right angles to each other, for example rec¬ tangles or squares. Moreover, various rotary-symmetrical forms such as regular polygons may be used for the clamp¬ ing members. In connection with such forms of clamping members, the opening 4 therein for screws or bolts can be provided in the intersecting point of the two main axes or in the central point of rotary-symmetrical members. At the cor¬ ners of such members, there can, moreover, be provided a recess 3 which, according to the invention, can advanta¬ geously be arranged with its axis 10 being spaced from each of the edges which define the corner, the distance between such edges and the axis 10 being approximately one half of the distance C between the respective centers of the head portions 7, 8 (Figure 1). With such an arrangement, two pairs of clamping mem¬ bers which are coupled together will adjoin each other rather closely, e.g. as shown in Figure 1. The pairs of clamping members can thereby lean against each other, whereby the joint between two pairs becomes particularly resistant to bending stresses acting in the plane of the paper in Figure 1. The corners of the clamping members or at least those corners at which a recess 3 is present may, more¬ over, be rounded off with a rounding radius which is one half the center spacing C. Thereby, the rigity or resi¬ stance to bending stresses just mentioned will still be obtained and, moreover, it is obtained that two joined pairs of clamping members can pivot or be swung relative to each other into a closely folded position, for example as the two pairs of clamping members shown to the right in Figure 3c. In addition, and in accordance with the invention, the width of the clamping members can also appropriately equal the center distance C, whereby the end portions of members of that type will have a semi-circular contour. Accordingly, two pairs of clamping members of that design and being joined to each other by means of a linking unit, can pivot or be swung in both directions and in both instances the two pairs of clamping members can be folded closely together lying side edge against side edge. According to the invention, the shape of the reces¬ ses 3 and the size of the head portions 7, 8 are prefe- rably adjusted or adapted so that two clamping members 1, 2 which have been tightened as shown in Figure 1, have an overall height which also equals the center distance C. Thereby it is obtained that a pair of clamping members which has been rotated 90° about its longitudinal axis, e.g. as shown in Figure 3c, will not break an otherwise continuous or flat surface in an assembly. Figures 4a and 4b illustrate two series of clamping members which show the features mentioned above. The in¬ dividual members can be of different length and if de- sired or necessary, ' for example particularly long mem¬ bers, can be provided with several openings 4 for screws or bolts, if the symmetry of the members is maintained thereby. The clamping members of the building set of the in- vention are preferably arranged and designed in accor¬ dance with an appropriate modular system and Figures 4a and 4b show an example of such a system. Thus, the small- O I est square plate member shown corresponds to two of the shortest bar member shown. Similarly, the middle-sized square plate member corresponds to three of the middle- sized bar member shown, and, finally, the biggest square °5 plate member shown corresponds to four of the longest bar member shown. In connection with a modular system as that illu¬ strated, the middle-sized and the biggest square plate members may also be provided with recesses 3 at inter- 1° mediate points along the plate member edges as indicated in Figure 4b. With an arrangement of linking units 5 and spacer balls 5" as that shown in Figure 4a, the two series of clamping members which include clamping members being 5 identical two by two, can be joined in many different positions, for example the position .shown in Figure 4c, wherein there may be one or more links which are more or less movable, depending on how tightly the members of the individual pairs of members have been clamped together. 20 in the assemblies described above, only basic link¬ ing units as unit 5 described in connection with Figure 1, have been used. In accordance with the invention, this basic unit may, however, be further developed by adding thereto one or more further connecting rods which are 25 connected with one of the head portions, e.g. the head portion 8, each such further connecting rod being pro¬ vided with a similar head portion at its outer free end. . Figures 6-9 illustrate examples of such further de¬ veloped linking units and examples of the utility of such 30 units. Thus, Figure 6 shows T-shaped linking units 11, and Figure 7 shows angular units 12. As indicated in Fi¬ gure 7, the head portion 8 at the middle of the angular units 12 may also be used for joining further clamping members to the assembly. 35 Figure 8 illustrates a cross-shaped unit 13, whereas Figure 9 illustrates a three-dimensional linking unit 14 in larger scale and wherein the connecting rods extend as the axes of a right-angled spatial coordinate system with the head portion 8 in the center thereof. In addition to the linking elements shown, the building set may also include a linking unit, wherein three connecting rods extend in accordance with the edges of a three- dimensional right-angled corner. By means of such further developed linking units, the building possibilities will be considerably enhanced. Figures 10-18 illustrate various examples of areas of use and building possibilities for the building set according to the invention. Thus, Figures 10-12 illustrate examples of how letters and symbols, e.g. for advertising purpo¬ ses, can be built. Figures 13-15 show examples of decora¬ tive structures, Figure 14 showing an example in which the linking units have extended connecting rods. Figures 16 and 17 show examples wherein furnitures have been built and both doll ■ s house furniture and true furniture for everyday use can be built. In particular, in furniture for real use, the above mentioned design of the head portions with flat fixing surface areas will be of importance in order to provide the necessary rigity or stability in the structure. Figure 17 also illustrates a particular use of angu¬ lar linking units 12 and of three-dimensional right -angled corner linking units 15. Thus, the arrangements shown provide possibilities of angularly adjusting and fixing the various pairs of plate clamping members ' rela¬ tive to each other. Finally, Figure 18 shows as an example how the building set according to the invention can be used to construct provisional or removable fences or partition walls. In particular, in connection with this type of use, the plate clamping units can advantageously be con¬ structed of an outer frame which has recesses 3 needed for the head portions of linking units, and this frame could be provided with cover plates or layers and, pos¬ sibly, an appropriate stuffing or filling inserted therebetween. The clamping members or plates can, depending on the use contemplated, be prepared of any suitable material such as wood, metal or plastic materials. The linking units can be prepared of metal or plastic materials, for example by injection moulding, or they can be prepared of wood or of plastic balls connected by rods of wood. The connecting rods can have any appropriate length (Figure 14) and can also be shaped to have e.g. curved or bent configurations. As already mentioned above, the clamping members have recesses 3 in at least one surface thereof. Recesses can also be provided in both opposite surfaces of the clamping members and, thus, a plurality of members can be clamped together with linking units sandwiched therebe¬ tween. Finally, the head portions or the connecting rods of the linking units may be provided with appropriate shoul¬ ders or neck portions which will engage with clamping members tightened about the head portions and thereby lock or stabilize the joints. In addition to the possibilities of use illustrated and described above, the constructional building set of the invention is also very suitable for providing light- weight and collapsible stands or racks, e.g. for tents or pavilions. In order to be collapsible, such stands or racks need not to be completely disassembled in order to be folded or collapsed into a compact condition. When erected, such stands or racks can be stabilized just by tightening appropriate clamping members therein. Many different arrangements may be made within the broad scope of the invention, and it is to be appreciated that the invention is not limited to the specific exam - pies given or to the specific components described and illustrated. OMPI IPO

Claims: CLAIMS 1. A constructional building set which comprises as its basic elements a plurality of linking units (5, 11, 12, 13, 14 or 15) , each linking unit comprising at least one connecting rod (6) having a generally ball-shaped head portion (7, 8) disposed at each end thereof, and a plurality of coupling members for coupling to¬ gether linking units by use of said head portions there- of, said building set being CHARACTERIZED in that said coupling members are clamping members (1, 2) having tigh¬ tening means (4, 9) for urging a pair of clamping members towards each other about head portions (7, 8) of linking units with said head portions being retained in a manner known per se in respective recesses (3) formed in at least one surface of said clamping members, said head portions of said linking units having such a size that, when inserted in and between registering recesses of two juxtaposed clamping members being urged together, they hold said two clamping members in spaced apart relation to each other. 2. The building set of claim 1, CHARACTERIZED by said recesses having a flat bottom area, and by said head portions having at least two diametrically opposed and flat surface areas. 3. The building set of claim 2, CHARACTERIZED by said head portions being dodecahedrons. 4. The building set of any of claims 1, 2 or 3, CHARACTERIZED in that at least some of said recesses (3) are disposed at corners of said clamping members, the distance between a central axis (10) of a recess and the edges defining such a corner being substantially equal to one half of the length (C) of said connecting rod (6) of said linking units measured from head portion center to head portion center (Figure 1). 5. The building set of claim 4, CHARACTERIZED by the O " clamping member corner at a recess being rounded off with a rounding radius substantially equal to one-half said length (C) of said connecting rod. 6. The building set of claim 5, CHARACTERIZED by said clamping members having a width which is substan¬ tially equal to said length (C) of said connecting rod. 7. The building set of any of claims 4, 5 or 6, CHARACTERIZED in that the shape of said recesses and the diameter of said generally ball-shaped head portions have been so adjusted that an assembly of two juxtaposed clamp¬ ing members, with head portions inserted therebetween, has an overall height which is substantially equal to said center-to-center length (C) of said connecting rod (6) (Figure 3c).

Inventors: LANZAFAME S
Applicants: LANZAFAME S
Application year: 1979
Main classification: A63H33
IPC codes: A63H33