DE2029676B2 - Two-lane steerable roller skate - Google Patents

Description

The invention relates to a two-lane roller skate which can be steered by tilting the upper part to the side has a connecting rib and an articulation zone connected to the axle beam, the from Plastic upper part and the connecting rib are ribbed in a rigid manner and the axle supports in their The central area merges into elongated joint zones that rise outwards.

Two-lane steerable four-wheel roller skates are known in many technical designs, which in the Principle all have the same steering system. This steering system is based on the use of an in the s vertical longitudinal center plane to the horizontal inclined joint, the joint axis of the the front and rear pairs of rollers rise outwards or are mirror images of one another are arranged. With this joint axis arrangement

ίο the front and rear roller axis deflected symmetrically to one another from the parallel position assigned to the straight-ahead position, whereby the roller skate from a straight path to a curved path transforms

A plastic roller skate has already been proposed to implement this steering principle (DE-PS 19 18 798), in which between the agate carriers and extending in the longitudinal direction of the roller skate Stiffening ribs a steering zone formed by a non-ribbed part of the webs In the structural design of the steering system, the roller axis is below that for the steering responsible joint axis.

This steering system of a two-lane roller skate is associated with significant disadvantages, in particular the cornering uud steering properties and also the Significantly affect smoothness. Furthermore, this steering system has a very high load on the external roles in the arc ride These disadvantages result from the fact that the in the Longitudinal center plane running vertically through the joint axis and vertically through the roller axis and furthermore between the hinge axis and the sole plate extending lever arm is relatively short The unfavorable relation of the levers in connection with the inclined position of the joint axis is of decisive importance for the disadvantages inherent in this steering system. For one made from synthetic material Roller skate can also set disadvantages from the fact that the relatively thin The joint zone is under compressive stresses and thus the position of the joint axis is within the range of the different loads when driving the joint zone is not precisely defined

There is already a steering system known (US-PS 3 26 539), in which the roller axis above the inclined joint axis so that the joint axis is subject to tension when driving with the roller skate At the same time, this steering system has the advantage that because of the relative low-lying steering axis a load shift towards the center of the lane takes place, which leads to a more even Pressure load on the individual rollers leads to this Steering system is characterized by better steering safety, which is reflected in the cornering after Setting up results in an easier and faster adaptation of the roller axis to the desired path radius. It also causes the more uniform Pressure load on the rollers a greater Lau early and a more even wear of the individual roles.

Although this steering principle has been known since 1885 it was later not used in the realization of roller skates.

It is the object of the invention to provide a To design roller skates of the type mentioned so constructively that the steering system known per se with someone under 21ug or pressure!

Joints in the manufacture of a roller skate from plastic are used kana

According to the invention, this object is achieved by that the respective joint zone below and / or seen in the longitudinal plane to the side of the roller axis runs, and that the stiffening rib with an opening for the passage of the roller axis or the Axle carrier is provided

The measures of the invention make it possible for a steerable roller skate made of plastic in an advantageous manner to put the particularly stress-sensitive joint zone under tension, which a significantly more material-appropriate stress than the proposed compressive stress is Die Measures of the invention also allow that in the roller skate made of plastic, the upper part, the The connecting rib and the articulation zone as well as the axle support can be formed in one piece, making such plastic roller skates extremely cheap for mass production, In particular, the design of the Geienkzone means that when choosing suitable plastics Material fatigue is hardly to be expected and thus the steering properties remain essentially unchanged over a long period of use.

Since the material properties of the plastic make particularly high-quality plastics desirable for the steering zone and, on the other hand, these high-quality plastics are not required for the upper part, the invention provides for a further embodiment of the invention that the axle support is integral with the Articulation zone and one or more attachments is provided, and that the attachments in the am Connecting rib arranged on the upper part can be inserted or used.

The stiffened axle support and the joint zone as well as the extension piece or the extension pieces are made of an elastic plastic material and the Upper part and the connecting rib made of a hard plastic material.

According to a further development of the invention it is also provided that the axle support has two axle support parts has, which are formed on a deeper, the integrally formed joint zone comprehensive connecting piece are, and that between the Achsträgerteile a cutout freely penetrated by the Laufrolleacnse is present is. This cutout can preferably be V-shaped.

To counteract material fatigue in the joint zone and to improve the steering properties To keep a long service life largely constant, are, according to a further embodiment of the Invention between the connecting rib and the axle support on both sides of the connecting rib return springs are arranged, which support a return of the axle support in the straight-ahead position. Such Return springs are known per se (DE-PS 1 011 and 2 38 436). Further embodiments of the invention are Subject of further subclaims.

The advantages and features of the invention also emerge from the following description of FIG Exemplary embodiments in connection with the claims and the drawing. It shows

Fig. I is a schematic diagram of the front view of a known roller skate, in which the steering decisive joint axis lies above the roller axis;

F i g. FIG. 2 is a side view of a roller skate according to FIG

Invention, in which the wheels are not shown in the view from the lying;

3 shows a section along the line III-III in FIG. wherein the upper part is inclined laterally for steering;

F i g. 4 one of the view according to FIG. 3 corresponding section through a roller skate, in which the Resetting is supported by springs;

F i g. 5a and 5b each show a partial view of further embodiments, the section according to FIG. 3 accordingly, where in one embodiment, return springs are provided to support the return;

F i g. 6a and 6b partial views of further embodiments corresponding to the section according to FIG. 3, with two Connecting ribs for the bracket of the axle beam, the right-hand partial view showing a version with shows a return spring;

F i g. 7 shows a section through an embodiment with an articulation zone between the axle support and the upper part metallic. Feathers;

Fig. 8 is a side view of a Rr.-ischuhs, in which the joint zone is under tension;

F i g. 9a and 9b are partial views of further designs along the line IX-IX in FIG Partial view of an embodiment with an indicated

Reverse spring shows

The illustrated in Fig. 1 front view of a roller skate 1 shows a known structure in which In accordance with the steering system, which is also known, the hinge axis carries the roller axle 2 via one of the rollers the axle support 3 is located The distance c between the hinge axis at the hinge point a and the sole plate 5 results in a lever arm b, the length of which is important for the cornering and steering properties of the roller skate Tilted upper part through Jen hinge point a intersects, the ground plane at point 7, which is offset by distance c from the center of the roller skate track 8 Castors 9. The greater the distance c from the center of the roller skate track 8, the greater the different surface pressure on the two rows of rollers, and the less favorable are the cornering and steering properties of the roller skate. As another Disadvantage from the relatively high surface pressure on the one row of rollers of the roller skate when cornering there is the need to use relatively hard running surfaces, which in turn leads to a noisy run.

so in fig. 2 is a side view of the roller skate according to a first embodiment of the invention, in which from the sole plate 5 by transverse ribs 10 stiffened connecting ribs 11 extend downwards. At a front and a rear, about 45 ° at an angle

π to the ground disposed edge of the respective connecting rib 11 of the axle support 3 is integrally formed with the transition area between the connecting rib 11 and the axle beam is designed as a resilient joint zone 12 3 The joint zones 12 are mirror images of one another with respect to a central plane, so that the joint axes d running through the gel lumens intersect at an angle of approximately 90 °. These joint axes run below and laterally seen in the plane of the Jjings

Roller axles.

A section through the roller skate along the line IH-III of FIG. 2 is in FIG. 3 shows the effect the longer lever arm and the one below the

The center line 13 through the upper part and the joint zone 12 intersects the floor plane at the point of intersection 14, which is offset by a distance f from the center of the roller skate track 8. Because of the articulation zone 12 lying below the roller axis 2, this distance / "is significantly smaller than c (Fig. T), so that there is also a more favorable load distribution on the two rows of rollers of the roller skate when cornering the center line of the inclined upper part, the two rows of rollers are loaded with approximately the same pressure, which is particularly desirable for maximum cornering and steering properties. In addition to the more even load, there is also a significantly lower maximum load, i.e. a significantly lower maximum surface pressure on the wheel running surfaces compared to the ScKsnrr.c "!, c" K "y ;; c ™ cn su :, ns; o; c iriugm.nM.M uci offers the use of softer running surfaces, whereby a significantly quieter run can be achieved.

From the sectional view according to FIG. 3, the Formation of the articulation zone and its articulation to the axle support 3 is particularly evident. the Transverse ribs 10 for stiffening the connecting rib U preferably end above the articulation zone 12, see above that this joint zone, which is made of the same material as the connecting rib, is elastically deformable. On the underside, a widening 15 is formed on the joint zone, which on both sides with each an axle support part 16 or 17 of the axle support 3 is connected. Between the two axle support parts 16 and 17 there is a preferably V-shaped cutout which extends from the roller axis 2 is interspersed. In the connecting rib 11 is also a Opening 18 provided through which the roller axle 2 extends, and which is sufficiently large to prevent the connecting rib 11 in inclined Position comes into contact with the roller axis.

As already mentioned, the roller skate is steered by tilting the upper part, which results in the The roller axis is rotated about an axis perpendicular to the floor surface. With this rotation of the The elastic joint zone 12 is subjected to bending stresses on the roller axis. However, since the joint zone 12 on the top of the attached to the two Achsträgerteile 16 and 17 widening 15 runs, the Joint zone 12 subjected to pressure in all running conditions.

In Figure 4 is a section through a roller skate, which is the section along the line III-III of Fi g. 2 corresponds to; however, it is a roller skate in which between the connecting rib 11 and the axle support 3 return springs 19 are arranged. For these return springs see the illustrated Ausfühningsform according to Fig. 4 coil springs Uses, one of which is shown on the right of the illustration and one on the left of the illustration only indicated in their course is for fastening the return springs designed as helical springs 19 lugs 20 are formed on the axle support ends, which one end of the return spring take up. The other end of the return spring rests against the connecting rib 11. It is also provided at each side of the connecting rib a corresponding approach, not shown, for receiving and Attachment of the return springs. The ends of the return springs can during the Manufacture of the roller skate must be molded into the approaches.

These return springs are intended to prevent possible fatigue of the material within the joint zone

s counteract and support the return of the axle carrier 3 in the straight-ahead position.

In the Fig.5a and 5b are partial sections through a split embodiment of the roller skate according to the invention, the partial sections through the

ίο Longitudinal median plane and along a line running in essentially of the line III-III of FIG. 2 corresponds. The one made from an elastic plastic material Axle support 3 has an upwardly extending extension piece 21 from the hinge zone 12, which in the essentially how the lower part of the connecting rib 11 according to FIG. 3 can be designed. This Extension piece 21 is inserted from below into the widened connecting rib 11 of the upper part and with

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built-up roller skate, cheaper and harder plastic materials such as thermosets, Find Verv end, while the axle support and the extension piece 21 with the articulation zone in between 12 made of an elastic plastic, such as. B.

2Ί thermoplastics and elastomers, can be produced. In Fig. 5b, an embodiment is shown in which the axle support part is provided with the extension 20, on which the ■ between the extension and the connecting rib 11 arranged return spring is attached.

3n The embodiment of the invention shown in FIGS. 6a and 6b differs from the the embodiments described above by that the connection between the sole plate 5 and the axle beams of two connecting ribs is taken, which run parallel to the longitudinal center plane. The partial sections each show only one right or left of the longitudinal center plane of the roller skate in a section that is in runs essentially along a line which corresponds to the section III-III of FIG. In Fig. 6a is a one-piece Embodiment and in Fig. 6b a split embodiment of the roller skate according to the invention shown. In such a roller skate, two joint zones run parallel to the longitudinal center plane side by side. If a tilt of the upper part causes the roller axes to pivot out of their parallel position to each other is brought about, experiences one joint zone essentially on a load Train while the other joint zone is essentially

so loaded on pressure. The advantage of these embodiments is that there is an even more favorable load distribution during cornering the two rollers results and thus the difference in surface pressure during cornering even further is decreased. In the embodiment shown in Figure 6b, the connecting rib 11 is after divided at the bottom into two ribs with corresponding recesses for receiving the from the Articulation zones 12 from extending extension pieces 21 are provided

The return spring 19 between the axle support parts and the connecting ribs is also used here Supporting the resetting of the roller axles in the straight-ahead position and counteracting a possible fatigue of the material in the area of the joint zone.

CHe sectional view of a further embodiment of the invention according to FIG. 7 shows a three-part

ten roller skate. In this embodiment, the upper part 4 and the axle support 3 are separately manufactured parts, which are fastened to one another with metallic springs 22 designed for the purpose of working. These feathers can be made up of one or more parts and are preferably in the Ar ^ carrier and molded in the upper part. In the field of Roller axle 2, the springs are provided with openings 18 through which the roller axle extends extends. By appropriate design Her springs it is possible to ensure that even in this multi-part embodiment of the invention The joint zone and thus the joint axis are located below and / or to the side of the seen in the longitudinal plane Caster axis extends. This embodiment has the advantage that due to the versatile design options a certain steering characteristic for the springs by changing the spring structure is adjustable.

In Fig. 8 is in side view and in Fig. 9a and 9b another embodiment of the invention is shown in partial section. One according to this embodiment constructed roller skate differs essentially from those described above Embodiments characterized in that the Gclenkzone essentially on tension and not on pressure is claimed. The roller skate consists of a sole plate 5, on which two downward and Connecting ribs 11 stiffened with transverse ribs 10 are arranged. In the connecting rib 11 is located an opening 23 is located above the lower transverse ribs, which are inclined in mirror image to one another 24. These openings 23 can be shaped differently, as shown in FIG. Through this Opening 23 runs a coherent axle support 25, which in the area of the longitudinal center plane on the The underside merges into the articulation zone 12, which is located between the axle support and the lower transverse rib 24 is trained. The axle support itself is expediently constructed in such a way that the under tensile load standing joint zone 12 is evenly tensioned over the entire length. Furthermore, on the Axle support lugs 20 may be provided or mounted, as shown in the right partial section Fig.9b can be seen. Between these approaches 20 and the connecting rib 11 can be used for the relief the return springs provided in the articulation zone run. The return springs can be used in particular elaborate roller skate types used for competitive sports with hydraulic, oneumatic or mechanical devices that dampen the steering movements in a suitable manner. Included it is also possible to use adjusting elements to ensure that the damping is adjustable.

This last-described embodiment of the invention offers due to the fact that the The joint zone is subjected to tensile loads and the joint axis also runs below the roller axis,

ίο particularly favorable steering properties during of cornering. The particularly quick and with very little effort adjustable adaptation to to highlight the respective curved path, especially the rapid adaptation to the curved path

is important because in roller skating the constant Lifting off and putting back down to push off even when running straight ahead on a curved path takes place and The steering safety becomes greater, the earlier the roller axis is that of the desired one after it has been put on Curve path assumes the appropriate position. As for steering use, mostly first When the front axle is attached, the advantage of the trailing axle is used for cornering and thereby achieved that the length of the required path to the correct steering setting is considerable is shortened. This in turn leads to easier control of the desired cornering and to figures that can be carried out more precisely, as the correct steering position is assumed more quickly. This faster Steering adjustment, however, means a much greater degree of safety when performing figures and in particular on landing. Another advantage of the embodiment according to FIGS. 8, 9a or 9b consists in the particularly favorable shape for a particularly cheap production of the roller skate as a one-piece Injection molded part.

It is obvious that the inventive concept on which the invention is based also applies to three-axis and multi-axis Roller skates can be used, the articulation zone expediently with respect to a central one Transverse plane are inclined in pairs so that when the upper part is tilted sideways Swing the roller axles out of their parallel position in such a way that the extension of the Cut the roller axles at one point.

In the event that an odd number of roller axles is used, it is necessary to to let the articulation zone of the middle roller axis run parallel to the sole plate.

For this purpose 2 sheets of drawings

Claims (9)

1 claims: 1. Two-lane roller skate which can be steered by tilting the upper part to the side, which has a connecting rib and an articulation zone connected to the axle beam, the one made of plastic existing upper part and the connecting rib are ribbed rigid and the axle supports in their The central area merges into elongated joint zones that rise outwards, characterized in that the respective articulation zone (12) is seen below and / or to the side of the roller axis (2) when viewed in the longitudinal plane runs, and that the stiffening rib (11) with a Opening (18; 23) is provided for the passage of the roller axle (2) or the axle carrier (25) 2. Roller skate according to claim 1, characterized in that the upper part (4), the connecting rib (11) and the articulation zone (12) and the axle support (3; 25) are in one piece. 3. Rollsdiah according to claim I _1, characterized in that the axle support (3; 25) is provided in one piece with the articulation zone (12) and one or more extension pieces (21), and that the extension pieces (21) in the connecting rib arranged on the upper part ( 11) can be plugged in or used. 4. Roller skate according to claim 3, characterized in that the stiffened axle support (3; 25) and the articulation zone (12) and the extension piece or the extension pieces (2t) consist of an elastic plastic material, and that the upper part (4) and the Connecting rib (11) and a;, i are molded in hard plastic material. 5. roller skate according to claim. and 4, characterized in that the axle support (3) has two Achsträgerteile (16,17), which on a deeper lying, the integrally formed joint zone (12) comprehensive connecting piece (15) are formed, and that between the axle support parts there is a cutout freely penetrated by the roller axis 6. Roller skate according to claim 5, characterized in that the cutout is V-shaped. 7. roller skate according to one of claims 1 to 6, characterized in that between the connecting rib (11) and the axle support (3; 25) return springs (19) known per se are arranged on both sides of the connecting rib (11). 8. roller skate according to claim 7, characterized in that the return springs (19) consist of coil springs. 9. roller skate according to claim 7 or 8, characterized in that the axle supports with lugs (20) are provided for attaching the return springs.