DK155145B - PRISMATIC TOYS BUILDING GUEST OF BUILDING MATERIAL - Google Patents

Description

DK 155145 B

BACKGROUND OF THE INVENTION The present invention relates to a prismatic toy building block of plastics having at least one end face a cut and of material other than the building block, as well as 5 grooves cut to the other surfaces for engagement with connecting steps on adjacent building blocks, and wherein the connecting pin is inserted into the building block with a support on which longitudinal ribs are arranged for protection against rotation of the support relative to the building block.

10 The connection between the connecting pin and the cut groove requires the most accurate adherence to the dimensions, on the one hand, to keep the friction within a value that can be easily overcome by a child and on the other hand to achieve a longitudinal connection also effective. . A greater dimensional accuracy is achievable with a solid building block, but this, in addition to the larger material consumption and the longer injection molding times, has the disadvantage that the application of the connecting pin at the insertion area of the notes presents difficulties due to the stiffness.

20 A tubular configuration of the building block according to DE-PS

1,290,696 would in certain circumstances solve the problem due to the greater elasticity of the profile. Admittedly, this elasticity extends over the total length of the building block, so that the pull-out force for a connecting step introduced into a groove due to the corner areas' suspension is brought down to an unacceptable level. In addition, the dimensional accuracy of the notes is not controllable in such a way that all four notes have the same shear conditions. The ability of the patent known to provide the building block with a cut-out connecting pin exactly in the insertion area of the notes causes the hollow building block's profile to become stiffer, whereby the difficulties in introducing the connecting step still exist.

The invention has for its object to improve a prismatic plastic toy building block of the kind known in the preamble of claim 1 in such a way that, with the same connection quality as with a solid building block, firstly an improvement of the insertion of the connecting pin is achieved in the cut. note and second, a further saving.

2

DK 155145 B

According to the invention, this is achieved by the building block being at least projecting from an end surface over part of its length, hollow to the extent possible, corresponding to the outer contour of the stone, the width of the cavity narrowing between two perpendicularly adjacent notes to the thickness of the longitudinal ribs.

By hollowing out the building block at least from an end surface over part of its length, an elasticity is achieved in the insertion area of the grooves, which facilitates the insertion and insertion of the connecting pin into the groove. The cavity narrowing between two at right angles to one another is used to record the longitudinal ribs serving as a pivot lock on the front. The other part of the hollow remains free, so that the building block profile is not rigid.

15 adjacent to the cavity of the building block, there is again a solid core, so that the same conditions are present as with a massive building block.

According to a further development of the invention, the depth of the hollow may correspond to the length of the attachment. This results in a depth of 20 for compressing the connecting block with the building block.

Finally, according to a further development of the invention, the four corner areas which emerge from the hollow between the grooves in the longitudinal direction can extend over the entire length of the building block 25. By connecting the notes longitudinally adjacent to the hollow, a stability corresponding to the stability of a solid building block is obtained, so that the further hollowing of the corner areas over the entire building block length gives a material saving without affecting the quality of the connecting ice.

According to a further embodiment of the invention, a steel core, which is anchored with a protruding part in addition to the support, can be pressed into a core drill in the building block in a manner known per se. This measure serves to increase the anchorage of the connecting step in the building block.

Embodiments of the invention are shown in the drawing. In the drawing, FIG. 1 is a side view of a building block according to the invention and partially in longitudinal section; and FIG. 2 is a section through the building block of FIG. First

3 DK 155145 B

The FIG. 1 and 2, the prismatic building blocks 1 are provided with longitudinal grooves 2 and on one end surface with a connecting pin 3. The connecting pin 3 is provided with an insert 4 having cross-shaped longitudinal ribs 5. These 5 ribs 5 have on the side facing the connecting pin. abutment surfaces 6 which, after pressing on the attachment 4 into the opening · 8 formed by the wall 7 of the longitudinal grooves 2, extend slightly beyond the level of the end surface on the building block and thus form a counter bearing. By pressing the attachment 4, the longitudinal ribs 5 of the cavity constrictions 9 formed between two notes 2 are taken up, the inside width of which corresponds to the thickness of these ribs 5. This provides a pivot lock for the connecting pin 3. The depth of the outer contour of the building block 1 hollow 10 is equal to the height of the attachment 4, 15 so that when the insert is pressed into the end surface of the building block, a depth restriction takes place. To increase the tear-off strength of the connecting pin 3, a steel core 11 is pressed into a bore in the bore 4 which protrudes with the part 11a beyond the bore 4. This uneven part 11a of the steel core 20 is anchored in a corresponding bore 12 in the building block 1.

By means of the hollow 10 extending from one end surface and extending over a part of the length of the building block 10, an elasticity in the insertion area of the longitudinal groove 2 is obtained which, due to a reduction of the friction, facilitates the application of the connecting pin 3. In the second area of the building block 1 then again a high stiffness to prevent connecting the icicles too easily protruding from the longitudinal notes. This stiffness is achieved by connecting the groove walls by corresponding full extrusion of the building block core 13, while the four corner areas appearing between the grooves 2 are hollowed out over the total length of the building block.

Claims (4)

1. Prismatic toy building blocks of plastics and having at least one end face a cut and of a material other than the building block, and grooves on the other 5 surfaces, adapted for engagement with connecting pins on adjacent building blocks, and wherein the connecting step is inserted into the building block with a support on which longitudinal ribs are arranged for protection against rotation of the support relative to the building block, characterized in that the building block is at least hollow at least from an end surface over a part of its length. possible extent corresponding to the outer contour of the stone, the width of the cavity constrictions formed between two perpendicularly adjacent notes being adapted to the thickness of the longitudinal ribs. The toy building block according to claim 1, characterized in that the depth of the hollow corresponds to the length of the attachment. Toy building block according to claim 1, characterized in that the four corner areas appearing between the grooves 20 at the hollow preferably extend over the entire length of the building block. The toy building block according to claim 1, characterized in that a steel core is pressed in, in a manner known per se, which is anchored with a protruding part in the core in a core drilling in the building block.