EP2227978B1 - Trolley bag - Google Patents

Abstract

The suitcase has a handle provided at a front main surface, and auxiliary areas (5.1, 5.2) whose rotation axes (C, C', E, E') are in distances (10.8, 15.8, 20.8, 25.8) that are greater than radii of outside circumferences of a swivel path of front and rear pairs of wheels (10, 15, 20, 25). Distances (20.6, 25.6) of two pivot axes of the rear pair of wheels arranged at a rear main surface are greater than distances (10.6, 15.6) of two pivot axes of the front pair of wheels arranged at the front main surface. Radii of the rear pair of wheels are smaller than radii of the front pair of wheels.

Description

The invention relates to a rolling suitcase for upright and tilted rollers, comprising a case body having a substantially rectangular bottom surface, to which connect two major surfaces and two minor surfaces of the case body, wherein at a front of the two main surfaces a pull handle is provided, and the rolling suitcase has four castors , wherein the steering rollers each have a freely rotatable about a horizontal roll axis roller and are mounted pivotably about a pivot axis arranged perpendicular to the pivot axis, and thereby the pivot axes are arranged on the bottom surface of a respective closer side surface inwardly offset, that a distance of the pivot axes is larger than the auxiliary surfaces of a radius of an outermost circumference of the swivel path of the castors.

State of the art

One type of trolley known today, so-called trolleys, have at least two casters with coaxial stationary roll axles on a front edge of the movement in the direction of movement, on which the suitcase can be pulled in a tilted state by a user. In this case, only the two at the front in the direction of pull rollers arranged in contact with the ground, while any existing additional roles are lifted from the ground. The rollers carry only a part of the luggage load, while the user also has to apply a load capacity.

Other known rolling suitcases allow upright rolling. The weight of the case is carried by typically 4, provided in corner regions on a bottom surface of the suitcase support rollers. For better maneuverability of the suitcase, at least two of the carrying rollers are usually designed as steering rollers, which are mounted so as to be pivotable about a vertical axis and thus, in upright rolling, i. if all castors have ground contact, facilitate a control of the suitcase.

A well-known such suitcase is for example in the US 2002/0024189 A1 (Chen ). This has four, arranged on pedestals at corners of a floor surface castors. It is known to arrange the castors on the bottom surface as far as possible outside to maximize an effective footprint, so that a good tilting security of the suitcase is ensured (see, for example, also EP 0 874 564 B1 ; Rimowa). Due to the arrangement in the corner areas are compared to casters with fixed axes structurally complex and thus more susceptible to interference steering wheels prone to mechanical damage, for example, by hitting an obstacle.

Another such suitcase is from the US 2008/083592 A1 (Mangano Joy) known. It describes a trolley with foldable shelves and collapsible drawers in an interior. These shelves and drawers can be folded relatively flat when not in use and stowed in the case. On the outer, lower surface of the case casters can be attached, which each individually by 360 Degree are pivotable. As a result, each individual caster can be independently rotated to any position, the rollers being perpendicular to the lower surface of the case. This makes it possible to transport the case rolling in an upright position. In addition, the case includes an extendable handle, which can be stored in the case when not in use.

For a rolling suitcase, which should be able to be rolled in both ways, ie upright rolling as well as tilted rolling, on the one hand the requirement of a good steerability when upright rolls to ensure. On the other hand, a comfortable tilted roles should be possible, and it is basically desirable that compared with Fixed castors for mechanical damage vulnerable castors are protected against unwanted external mechanical action.

Presentation of the invention

The object of the invention is to provide a the above-mentioned technical field belonging as robust as possible rolling suitcase, which is versatile applicable and comfortable to handle.

The solution of the problem is defined by the features of claim 1. According to the invention, the roller case for upright and tilted rollers comprises a case body with a substantially rectangular bottom surface, to which connect two main surfaces and two auxiliary surfaces of the case body. In this case, a pull handle is provided at a front of the two main surfaces and the case has four castors. The castor wheels each have a freely rotatable about a horizontal roll axis roller and are mounted pivotably about a pivot axis arranged perpendicular to the pivot axis. In this case, the pivot axes are arranged offset inwardly on the bottom surface of a respective closer auxiliary surface in that a distance of the pivot axes of the auxiliary surfaces is greater than a radius of an outermost circumference of the pivoting track of the castors. According to the invention, a distance of the pivot axes of a rear pair of the steering rollers, which is arranged at the rear main surface of the rear main surface is greater than a distance of the pivot axes of a front pair of castors from the front main surface, which front pair is arranged at the front main surface ,

Rolling suitcases according to the invention typically have a largely parallelepiped-shaped suitcase body, which comprises the bottom surface, adjoining side surfaces, ie the main surfaces and side auxiliary surfaces, and a cover surface not described here in detail. "Floor" and cover "refer here to an orientation of the case when upright rolls, in which all roles are in contact with the ground, as well as the terms" top "and" bottom. "In the following, an axis which is parallel to the Side surfaces of the case is arranged and through a center of the case body is referred to as the longitudinal center axis of the case body.

The main surfaces of the case denote those side surfaces of the case body, which are arranged in a tilted roles of the suitcase in the direction of movement front (front main surface) and rear (rear main surface). Typically, in a case according to the invention, the side auxiliary surfaces are narrower than the main surfaces. An edge at the transition from the front main surface to the bottom surface is referred to below as the front bottom edge while a rear bottom edge refers to the transition of the rear main surface to the bottom surface. A pull handle provided for pulling the case is in the pulling direction at the front on the case body, i. at the front main surface, arranged. The pull handle can be provided, for example, on the cover surface or on the front main surface.

The inventive rolling suitcase is suitable both for upright and for tilted roles. For this purpose, the trolley has four castors to ensure good maneuverability when upright roles. Steering rollers in the front main surface also have the advantage that a tilting of the rolling trunk is simplified because unlike known trolleys with fixed roll axles swivel the castors during tilting or tilted roles due to the rolling direction completely backwards, i. pivoted to the rear main surface are arranged under the case body. A tilting axis is thus arranged offset from the front bottom edge to the rear under the case body and thus closer to a perpendicular through the center of gravity of the rolling trunk. Thus, the user when tilting a lesser effort to spend, since the focus is arranged in the tilting direction closer to the tilt axis.

However, in order to enable a tilted roles, it is necessary to arrange the pivot axes of the front castors on the bottom surface, that even with fully pivoted rearward position of the front castors of the trolley can be tilted into a comfortable rolling position for the user. As a guideline for a comfortable tilted rolling, the case according to the invention provides the boundary condition that even smaller persons with a body size of about 1.55m can pull the suitcase tilted on the pull handle with largely downwardly stretched arm without problems. Around To be able to ensure requirement, it has been found that the suitcase (ie its longitudinal central axis) must be able to be inclined to a tilt angle of at least about 55 degrees with respect to a vertical, or generally with respect to a perpendicular to the roll base. It is necessary for a tilted roles that parts of the suitcase such as the front bottom edge does not hit the ground. The front castors are therefore arranged in a novel rolling suitcase on the case body, that all parts of the suitcase are outside an imaginary plane at fully pivoted front castors, which tangentially touches the front rollers and an angle of 90 degrees (perpendicular to the roll support) - 55 degrees (tilt angle) = 35 degrees with the longitudinal center axis of the case includes.

In addition to the arrangement of the front castors with respect to the case body, it is also necessary that support structures of the castors, which hold the rollers are formed accordingly. On the support structures on the one hand the rollers of the castors are rotatably mounted about the roll axis and on the other hand, the support structures are pivotally mounted on the case body about the pivot axis. The support structures are therefore to be designed so that they are completely out of a plane (ie, do not intersect this plane), which abuts the front bottom edge, or the foremost parts in this area, and tangentially contacts the front rollers in the fully rearwardly pivoted position , This ensures that in case of excessive tilting of the case body first comes into contact with the roll base and so the support structures are protected on the one hand by the case body or the front floor edge area and on the other not hinder the tilting.

As an advantageous guideline for the arrangement of the pivot axis of the front pair of castors, this has shown that in conventional embodiments of the castors, a distance of the pivot axes of the front pair of castors from the front major surface is in the range of a radius of the associated rollers. Preferably, the distance of the pivot axes of the front major surface is in a range of about 70% to 130% of the radius of the rollers. For the optimal arrangement of the front However, castors on the case body is also a distance of the roll axis from the bottom surface and from the pivot axis to consider.

Typically, castors are made as compact as possible for reasons of stability, i. the roll axis is advantageously arranged close to the associated pivot bearing. In order to ensure a sufficient steering characteristic of the castors, usually a roll axis is spaced by about a radius of the associated rollers from the pivot axis. In addition, it is advantageous to design a distance of the roll axis from the bottom surface as small as possible in order to arrange the center of gravity of the suitcase as deeply as possible for a good tilting safety. The distance between the roll axis of a pivot bearing of the steering roller on the bottom surface is therefore advantageously only slightly larger than a radius of the corresponding roller. The dimensions of the castors given here are to be understood as basic guidelines and may differ from the specified values for specific designs depending on the requirements.

In order to achieve the largest possible effective footprint, castors are in normal rolling suitcases for upright roles, as mentioned above, as far as possible outside, arranged close to the corners of the bottom surface. However, such castors are usually pivotable beyond the area of the bottom surface and are thus vulnerable to damage due to mechanical action such as a collision with an obstacle (for example, with a curb).

On the one hand, the invention makes use of the knowledge that good protection of the castor wheels results if, when the rollers are upright, they remain arranged substantially below the case body. In this case, the case body in a collision with an obstacle, which is usually made robust, a protective function for the castors. It is particularly advantageous if the bottom surface of the case body has the smallest possible distance from the ground, ie, for example, that the rolling axes of the rollers of the castors are arranged close to the bottom surface. Due to the small distance from the ground, only obstacles which are smaller than the distance between the bottom surface and the ground (and thus pose a low risk of damage) can thus reach the castors without being previously blocked by the suitcase body.

On the other hand, the invention is based on the knowledge that the upright castors of the front pair have a lower risk of mechanical damage due to a collision than the castors of the rear pair on the rear main surface. This finding results from the arrangement of the pull handle on the case body, which also serves to manipulate the case when rolling upright. To allow a comfortable tilted roles the pull handle is advantageously arranged asymmetrically on the case body, at the front main surface. When upright roles of the suitcase is naturally aligned by the user so that the pull handle is closer to the body of the user. In order for the upright roles, the front main surface facing the user and the rear main surface on a side facing away from the user, outside arranged. The front main surface is thus screened by the user, while the exterior, rear main surface of the case is exposed to obstacles and mechanical actions by third parties and thus more prone to damage than the user facing side.

It is therefore sufficient for a sturdy trolley to better protect the castors of the rear pair than the castors of the front pair. A possible protrusion of the front castors due to the closer arrangement of the front main surface can be taken without substantial losses of robustness in order to improve in return the versatility of the case, namely that it is equally suitable for upright and tilted roles.

According to the invention, the case therefore has an asymmetrical arrangement of the castors on the bottom surface of the suitcase with respect to a plane parallel to the main surfaces. In this case, the pivot axes of the front pair of castors are arranged closer to the associated front major surface, as the pivot axes of the rear pair of castors with respect to the associated rear main surface. The rear castors, which as mentioned above are more prone to mechanical damage when upright rolling, can thus be largely hidden under the case body.

The spanned by the castors effective floor space of the rolling trunk is by the inventive arrangement of the pivot axes of the castors with respect to the Floor surface of the case body offset to the front main surface. Thus, the effective footprint is greater than if all the castors would be offset to the same extent as the rear castors of the associated major surfaces inwards. Due to the asymmetrical arrangement of the castors, therefore, according to the invention a sufficient tilting security is ensured when rolling upright in the direction of the rear or front main surface.

It is understood that, taking into account the inventive limitations (ie, inter alia, in any pivot position of the castors a supernatant on the minor surfaces) with respect to the arrangement of the pivot axes of the castors, generally the pivot axes are to be arranged as close to the secondary surfaces of the suitcase, as possible large effective footprint of the suitcase to reach. For the rear castors, this also applies to an arrangement as close as possible to the rear main surface.

To better protect the rear castors is in a preferred embodiment of the inventive Rollkoffers the distance of the pivot axes of the rear pair of castors from the rear main surface greater than a radius of an outermost circumference of the pivoting track of the castors. The pivoting track of a steering roller here denotes the rotational volume which sweeps over the steering roller in a complete rotation about the associated pivot axis. A radius of the outermost circumference of the pivoting path with respect to the pivot axis is determined as the sum of the distance of the roll axis from the pivot axis and the radius of the roller. By the distance of the pivot axis is greater than a respect to the pivot axis outer circumference of the pivot path, it is ensured that regardless of the pivot position of the rear castors, they are arranged in an upright arrangement of the trolley completely below the case body. As a variant, arrangements are conceivable in which the rear castors survive little or hardly beyond the rear main surface. In this case, however, no optimal protection of the rear castors would be guaranteed.

The rollers of the front castors have to have a certain minimum diameter for good rolling properties when tilted roles, which, depending on the size and Adaptation of the suitcase is to be adapted (see also next paragraph below). As already mentioned above, however, one basically strives to place a center of gravity of the case body as deep as possible in order to ensure a good tilting safety when upright rolling.

Advantageously, therefore, a radius of the rollers of the rear pair of castors is chosen smaller than a diameter of the rollers of the front pair of castors. This ensures that the arranged largely below the case body rear castors have less space than the arranged on the front main surface front castors. Due to the smaller roller radius of the rear wheels, a center of gravity of the roller case can thus be arranged lower in upright roles, as would be the case with rollers having the same radii as the front rollers.

To reduce the center of gravity wells are also often provided on the bottom surface, in which the castors are at least partially sunk. Such wells protrude into the interior of the case body and thus reduce the available packing volume of the case. The smaller footprint of the smaller, rear wheels is also advantageous in that such wells can be made shallower or even not necessary.

The radii of the rollers of the front castors are designed to be larger according to the present embodiment, with the advantage that improved smoothness when upright rollers and in particular when tilted rollers is achieved. Uneven ground and small obstacles are easier to overcome with larger diameter rollers. Since the front rollers are arranged closer to the front main surface, the required space for pivoting space is not completely below the bottom surface of the case body to provide. The troughs only need to create the space for the arranged below the case body portion of the swivel path. The greater space requirement of the front castors associated with the larger radii of the rollers is therefore less significant in view of the packing volume of the suitcase. The larger radii of the front rollers can thus due to the closer arrangement of the front castors in the Front main surface with comparatively small losses in terms of the pack volume in favor of the improved rolling properties are accepted.

As a variant, the rollers of all four castors may have the same radius, in which case in favor of the tilting safety for the lowest possible arrangement of the center of gravity and in favor of the largest possible packing volume as small a radius as possible. The versatility of the suitcase is also guaranteed in this case (upright and tilted rollable). However, the running characteristics are adversely affected by the smaller rollers, which is why such a rolling suitcase is less comfortable.

Preferably, the roller radius of the rollers of the front pair of castors is at least 15% larger, in particular at least 25%, as a roller radius of the rollers of the rear pair of castors. It has been shown that the values in the specified ranges ensure optimum packing volume with good running smoothness and resistance to tipping over. Depending on the specific design of the suitcase, other values above or below the specified ranges are conceivable. Preferably, the castors of the front castors have a diameter in the range of about 38mm - 60mm, i. a radius in the range of about 19mm - 30mm and the castors of the rear castors have a diameter in the range of about 30mm - 50mm, i. a radius in the range of about 15mm - 25mm.

Thus, the focus of the suitcase for improved stability when tilting upright rollers is located as low as possible above the ground and also better protection of the front castors is ensured, at least the castors of the front pair are advantageously arranged in troughs on the bottom surface. The associated rollers are preferably at least partially sunk in the troughs. The depressions may be formed, for example, as concave shells in the bottom surface or be present as inserts, for example, in corresponding recesses of the bottom surface. The castors are pivotally mounted on a trough bottom of the respective trough about the associated pivot axis to a bearing. The troughs preferably have a depth at which the rollers of the steering rollers arranged therein protrude about 40% -90%, preferably approximately between 50% and 70%, of the roller diameter in the direction perpendicular to the bottom surface over the troughs. With a roll diameter of For example, about 50 mm, the trough has, for example, a depth of about 10mm - 20mm and the rollers are about 30mm - 40mm over the bottom surface over.

The front castors are, as mentioned above, arranged so close to the front main surface that the trolley can be easily tilted backwards even with complete deflection of the castors. Depending on the embodiment of the suitcase can be pivoted on the front main surface in this arrangement, the pivot axes of the front castors when upright rolling the castors. In order to ensure unimpeded pivoting of the front castors even with partially sunk arrangement of the rollers, the wells of the front pair of castors are therefore preferably formed on the front major surface of the case body to the outside open. In addition, in a recessed arrangement in the wells, the front castors are better protected against mechanical action and any associated damage. Preferably, the troughs are formed closed on the side surfaces for better protection of the castors.

If the rollers are not countersunk in the troughs, the troughs on the front main surface can also be designed to be closed. In this case, the castors would be exposed and thus more susceptible to damage. In addition, a center of gravity for the same roll diameter would be located less deep above the ground.

Preferably, in a further embodiment of the roller case, the steering rollers of the rear pair are also arranged in troughs of the bottom surface. In the case of relatively small diameters of the rollers, however, the rollers of the rear castors do not need to be recessed in the troughs. It is already advantageous in this case, for example, if only the associated pivot bearings are sunk in the wells, so that the projection on the bottom surface can largely correspond to the roll diameter. However, it is quite conceivable to arrange the rollers of the rear castors sunk in the troughs, so that the focus of the suitcase is as low as possible above the ground and also the castors are optimally protected in the troughs. The troughs of the front castors may be formed directly in the bottom surface or as separate inserts. However, it is advantageous to form the troughs of the rear castors with the least possible depth, so that the Packing volume of the case is only slightly reduced by the protruding into the case body wells.

The troughs of the rear pair of castors are advantageously closed at the rear main surface to the outside. This ensures that the arranged on upright rollers outside, and thus more prone to mechanical damage, rear castors are best possible protection. Preferably, the troughs of the rear castors are also closed on the secondary surfaces for better protection of the castors.

If, in one embodiment of the suitcase, the rear castors do not remain completely underneath the case body, depending on the pivoting position, consideration should be given to designing the rear troughs open at the rear main surface.

If the front and the rear castors are arranged in hollows of the bottom surface, advantageously the troughs belonging to the front pair of castors are formed deeper than the troughs belonging to the rear pair. This is particularly advantageous in connection with larger rollers of the front castors and smaller rollers of the rear castors, so that the rolling suitcase when rolling upright with the smallest possible distance of the bottom surface to the ground substantially perpendicular to the roll base, i. the ground, can be aligned. Advantageously, the vertical projections of all castors on the ground surface are largely the same size. Preferably, the supernatants of the castors over the bottom surface in the range of about 30mm - 40mm. With larger roller diameters of the front castors they are in this case preferably deeper sunk in the associated troughs to arrange, as the rear castors with smaller diameters roll diameter.

In the formation of the hollows is overall to be noted that a packing volume should be affected by the projecting into the case body wells in the least possible extent. In particular, the other boundary conditions such as a good protection of the castors and a comfortable handling are to be considered.

In particular, in an embodiment of the trolley with rollers of different diameters, a distance between the pivot axes of the castors of the rear pair of the respective adjacent minor area is smaller than a distance of the pivot axes of Castors of the front pair. This ensures that the pivot track of the rollers does not extend beyond the auxiliary surfaces and yet a dimension of the effective footprint in the direction parallel to one of the main surfaces can be chosen as large as possible. The pivot axes of the rear steering rollers may be located closer to the respective minor surface than the pivot axes of the front rollers due to the smaller outermost periphery of the pivot track. Depending on the design of the castors while a distance from the adjacent auxiliary surface is sufficient, which is for example in the range of two times to three times the associated roller diameter. It is also conceivable to arrange the pivot axes of the front and rear castors in succession, on a straight line parallel to the respective secondary surface. However, since the pivot axes of the front castors must be offset further inward for larger rollers, as it would have to be the pivot axes of the rear castors, the effective footprint is not chosen as large as possible in this case.

As mentioned above, the rolling axes of the castors are preferably spaced from the respective associated pivot axes, wherein in particular a vertical distance of the rolling axes of the first pair of castors from the associated pivot axes corresponds approximately to a radius of the associated rollers. Thus, a sufficient steering ability and directional stability of the castors is ensured in the direction perpendicular to the pivot axis compact design.

Preferably, all castors are completely and freely pivotable about the respective associated pivot axis. In principle, it is conceivable that the pivoting ability of the castors is limited to a certain angular range. For example, since the orientation of the case when rolling upright due to the arrangement of the pull handle is predetermined to some extent, it may be sufficient to ensure the pivoting ability of the castors only in a limited angular range. However, to achieve the greatest possible maneuverability, completely free pivotability is preferred.

While various types and configurations of access handles are conceivable, the pull handle of a rolling trunk according to the invention is advantageously designed to be extendable parallel to the front main surface on the case body. The pull handle may be preferred be completely sunk in the case body, so that the case has, for example, when carrying as compact outer mass. But there are also foldable or not fully retractable or (even multiple) extendable pull handles conceivable.

In order to make the suitcase equally comfortable for persons with different body sizes, the pull handle advantageously has three latchable pull-out positions. In addition, the pull handle preferably has a recessed position in which it is completely sunk in the case body. A first, lowest extension position of the pull handle is provided for pushing upright rollers. A third, maximum extension position is intended for pulling on tilted rollers for persons of average height, while a second, middle extension position is intended for persons who have a below-average body size. This ensures that a comfortable orientation of the case for all size classes of users is possible for pulling the tilted roles. Alternatively, the pull handle may only have a recessed and only a maximum extension position, in which case the versatility of the suitcase is limited.

In order to make the suitcase also suitable for carrying, the case body has an additional carrying handle on one of the auxiliary surfaces. The carrying handle is preferably formed in a recess provided for this purpose of the secondary surface and can be sunk therein. The carrying handle is advantageously designed as a fold-out handle. The design of the carrying handle can be largely arbitrary and adapted to the particular needs of each suitcase.

Gesamtthaft is thus a particular embodiment of the trolley particularly advantageous in which the front castors are provided with rollers with a larger diameter than the rear castors. In this case, the castors are advantageously arranged in troughs on the bottom surface, wherein the troughs of the front castors are deeper than the troughs of the rear castors. In this case, it is particularly advantageous if the troughs of the front castors on the front main surface are open and the troughs of the rear castors are closed on the rear main surface. The pivot axes of the castors are arranged such that the rear castors do not extend beyond the rear main surface are pivotable and the front castors allow a tilted rolling the trolley. In this case, none of the castors is pivotable beyond the auxiliary surfaces.

From the following detailed description and the totality of the claims, further advantageous embodiments and feature combinations of the invention result.

Brief description of the drawings

Fig. 1

eine Teilansicht einer Unterseite eines erfindungsgemässen Rollkoffers in einer Draufsicht auf eine Bodenfläche;

Fig. 2

ausschnittsweise eine schematische Seitenansicht des Rollkoffers in einer Draufsicht auf eine Nebenfläche in einem Bodenbereich;

Fig. 3

eine konkrete Ausführung eines erfindungsgemässen Rollkoffers in einer Draufsicht auf die Bodenfläche des Kofferkörpers;

Fig. 4

Seitenansicht des Rollkoffers der Fig. 3 in einer Draufsicht auf eine Nebenfläche;

Fig. 5

eine Draufsicht des Rollkoffers der Fig. 3 auf eine vordere Hauptfläche.

Grundsätzlich sind in den Figuren gleiche Teile mit gleichen Bezugszeichen versehen.The drawings used to explain the embodiment show schematically:

Fig. 1

a partial view of an underside of a rolling suitcase according to the invention in a plan view of a bottom surface;

Fig. 2

a schematic side view of the rolling suitcase in a plan view of a side surface in a bottom region;

Fig. 3

a concrete embodiment of a rolling suitcase according to the invention in a plan view of the bottom surface of the case body;

Fig. 4

Side view of the rolling suitcase Fig. 3 in a plan view of a secondary surface;

Fig. 5

a plan view of the trolley of the Fig. 3 on a front main surface.

Basically, the same parts are provided with the same reference numerals in the figures.

Ways to carry out the invention

Fig. 1 shows a schematic partial view of an underside of a rolling suitcase 1 according to the invention in a plan view of a bottom surface 2 of a largely rectangular shaped suitcase body 3 of the trolley 1. Shown is essentially one half of the bottom surface 2. The case body 3 comprises one with respect to a direction of movement when tilted rolling of the trolley 1 rear and front main surface 4.1 and 4.2 and two lateral side surfaces 5.1 and 5.2 (see Fig. 4 ). The main surfaces 4.1 and 4.2 are at an associated front floor edge 2.1 and at a rear bottom edge 2.2 in the bottom surface 2 over. The secondary surfaces 5.1 and 5.2 merge at respectively associated bottom edges 2.3 and 2.4 in the bottom surface 2. The bottom edges 2.1 to 2.4 surround the bottom surface 2. The secondary surface 5.1 adjoins the leading main surface 4.2 at the edges 6.1 and 6.2, while the minor surface 5.2 transitions at the edges 6.3 and 6.4 into the rear main surface 4.1 (see also FIG Fig. 3 to 5 ). The edges 6.1 to 6.4 are largely parallel and vertically upright, ie perpendicular to a roll base, arranged.

In the Fig. 1 not shown half of the bottom surface 2 is with respect to a center plane B, which is substantially perpendicular to the main surfaces 4.1 and 4.2 and includes a longitudinal axis A of the case body 3, formed mirror-symmetrically to the half shown. The longitudinal axis A is substantially perpendicular to the bottom surface 2 and passes through a center of the case body 3. In particular, the edges 6.1 to 6.4 are arranged substantially parallel to the longitudinal axis A.

On the bottom surface 2, a rear and a front castor 10 and 20 are arranged. The rear steering roller 10 is at the rear major surface 4.1 (see for example Fig. 4 ) or arranged at the rear bottom edge 2.1, while the front steering roller 20 is disposed at the front main surface 4.2 or at the front bottom edge 2.2. In the presentation of the Fig. 1 the front castor 10 is fully pivoted forward, while the rear castor 20 is pivoted completely backwards.

The front steering roller 10 has a relative to a pivot axis C of the steering roller 10 staggered roller 10.2. The roller 10.2 is freely rotatable about a roll axis D, wherein the roll axis D is arranged parallel to the bottom surface 2. With "axes" are here and below, unless otherwise stated, imaginary imaginary geometric axes. The roller 10.2 is freely pivotable about the pivot axis C in all directions, ie 360 degrees, wherein the pivot axis C is arranged substantially perpendicular to the bottom surface 2. In particular, the pivot axis C is also parallel to the High edges 6.1 and 6.2 of the case body 3 arranged to ensure a good steering function of the castor 10 when upright roles. The roll axis D and the pivot axis C are thus perpendicular to each other, wherein the roll axis D has a distance 10.9 from the pivot axis C, which largely corresponds to a radius of 10.3 of the roller 10.2. A support structure 10.4, on which the roller 10.2 is rotatably mounted about the roll axis D, and which is pivotally mounted about a bearing 10.5 on the case body 3 about the pivot axis C, is for reasons of clarity in Fig. 1 not shown (see Fig. 3 to 5 ).

The pivot axis C is arranged on the bottom surface 2 in such a way that a distance 10.6 from the front bottom edge 2.2 or from the front main surface 4.2 largely lies in the region of the radius 10.3 of the roller 10.2. In the example shown, the distance of the pivot axis C from the front major surface 4.2 is about 6/5 of the radius 10.3 of the roller 10.2. An outermost Umfriss 10.7 a pivoting track of the steering roller 10 thus passes beyond the front bottom edge 2.2 and the front main surface 4.2 out. Of the adjacent side surface 5.1, the pivot axis C of the steering roller 10 has a distance 10.8, which is dimensioned such that the outline 10.7 of the pivot path is arranged in the direction of the side surface 5.1 in the area of the bottom surface 2 and does not extend beyond the side surface 5.1. In particular, this means in the above-described mutual arrangement of the pivot axis C and the roll axis D to the pivot axis C, and the radius 10.3 of the roller 10.2 that the distance of the pivot axis C of the side surface 5.1 and the associated bottom edge 2.3 is greater than twice the Radius 10.3 of the roller 10.2, ie greater than a diameter of the roller 10.2. In the presentation of the Fig. 1 the distance 10.8 is about 6/5 of the diameter of the roller 10.2.

In general, the distance 10.8 of the pivot axis C of the auxiliary surface 5.1 to choose greater than the sum of the distance 10.9 of the roll axis D of the pivot axis C and the radius 10.3 of the roller 10.2. This ensures that the distance 10.8 of the pivot axis C from the secondary surface 5.1 is greater than a radius 10.10 of the outermost outline 10.7 of the swivel path of the steering roller 10.2. In order to ensure the greatest possible effective footprint 30, it is basically all Embodiments desirable under the above boundary conditions to the arrangement of the pivot axes to arrange the castors as close as possible to the side surfaces of the trolley 1, of course, design features of the trolley 1 are taken into account. The effective footprint 30 of the trolley 1 (hatched) is defined by the support points 30.1 and 30.2 of the rollers 10.2 and 20.2 on a roll base 35.

In the presentation of the Fig. 1 the steering roller 10 is arranged in a cup-shaped, substantially semicircular trough 11. The trough 11 is arranged concentrically with the pivot axis C and has a radius 11.1, which is greater than the radius 10.10 of the outline 10.7. At a bottom 11.2 of the trough 11, the bearing is arranged 10.5, which allows the pivotability of the steering roller 10 about the pivot axis C. How out Fig. 2 can be seen, the roller 10.2 sunk in the trough 11 is arranged. The roller 10.2 can thus be freely pivoted within the trough 11. The trough 11 is formed open at the front bottom edge 2.2 or the front main surface 4.2, ie the trough 11 occurs at the main surface 4.2 at an opening 11.6 therethrough, so that the roller 10.2 can be pivoted forward over the main surface 4.2 addition.

The rear castor 20 has analogous to the castor 10 with respect to a pivot axis E of the castor 20 offset roller 20.2 arranged. The roller 20.2 is freely rotatable about a roll axis F, wherein the roll axis F is also arranged parallel to the bottom surface 2. The roller 20.2 is freely pivotable about the pivot axis E in all directions, ie 360 degrees, whereby the pivot axis E is largely perpendicular to the bottom surface 2 and thus parallel to the pivot axis C of the castor 10. The roll axis F and the pivot axis E are perpendicular to each other, wherein the roll axis F has a vertical distance 20.9 from the pivot axis E, which largely corresponds to a radius 20.3 of the roller 20.2. The radius 20.3 of the roller 20.3 is in the illustration of Fig. 1 about 70% of the radius 10.3 of the roller 10.2. A support structure 20.4 for the pivotable mounting of the roller 20.2 on a bearing 20.5 on the case body 3 is analogous to the steering roller 10 in Fig. 1 not shown (see Fig. 3 to 5 ).

The pivot axis E is arranged on the bottom surface 2 such that a distance 20.6 from the rear bottom edge 2.1 is greater than twice the radius 20.3 of the roller 20.2, i. greater than a diameter of the roller 20.2. An outermost contour 20.7 of a pivoting track of the steering roller 20 thus does not extend beyond the rear bottom edge 2.1 or the rear main surface 4.1. In general, this must be the distance 20.6 the pivot axis E of the rear main surface 4.1 greater than the sum of the distance 20.9 of the roll axis F of the pivot axis E and the radius 20.3 of the roller 20.2. This ensures that the distance 20.6 of the pivot axis E from the rear main surface 4.1 is greater than a radius 20.10 of the outermost outline 20.7 of the swivel path of the steering roller 20.2.

The pivot axis E of the steering roller 20 has from the adjacent side surface 5.1 a distance 20.8, so that the outline 20.7 does not extend beyond the side surface 5.1. Analogous to the steering roller 10, this generally means that the distance 20.8 of the pivot axis E from the secondary surface 5.1 is greater than the sum of the distance 20.9 of the roll axis F from the pivot axis E and the radius 20.3 of the roller 20.2. Since the radius 20.3 is smaller than the radius 10.3 of the front steering roller 10, the pivot axis E can be arranged closer to the side surface 5.1 or at the associated bottom edge 2.3, as the pivot axis C of the front castor 10. In the illustration of Fig. 1 The distance 20.8 from the auxiliary surface 5.1 and the distance 20.6 from the rear main surface 4.1 both about 4/3 of the diameter of the roller 20.2. Basically, an arrangement of the rear castor 20 is to be preferred for a maximum effective footprint 30, in which, under said boundary conditions to the arrangement of the pivot axis, the steering roller 20 is arranged as close as possible to the side walls of the trolley 1.

The steering roller 20 is provided in a circular recess 21. The trough 21 is arranged substantially concentric with the pivot axis E and has a radius 21.1, which is dimensioned such that the pivot bearing 20.5 of the steering roller 20 can be accommodated therein. How out Fig. 2 it can be seen that the bearing 20.5 of the steering roller 20 is sunk in the trough 21, while the roller 20.2 is located outside the trough 21. The trough 21 is both to the side surface 5.1 out as well as on the rear bottom edge 2.1 and the rear main surface 4.1 formed closed.

Fig. 2 shows a detail of a schematic side view of the trolley 1 in a plan view of the side surface 5.1. The front castor 10 is disposed in the associated trough 11. At the trough bottom 11.2, the bearing is arranged 10.5, on which the steering roller 10 is pivotally mounted relative to the case body 3. As in Fig. 1 is the support structure 10.4 not shown for clarity. The roller 10.2 is partially sunk in the trough 11, wherein the steering roller about 4/5 of the diameter of the roller over the bottom surface 2 down to the roll base 35 out protrudes. The trough 11 thus has a depth which substantially corresponds to the sum of a dimension of the bearing 10.5 in the direction of the pivot axis C and 1/5 of the diameter of the roller 10.2.

The trough 11 has at the front major surface 4.2, the opening 11.6, whereby the roller 10.2 of the steering roller 10 can be pivoted forward over the main surface 4.1 out. The rear castor 20 is disposed in the trough 21. At the trough bottom 21.2, the bearing 20.5 of the steering roller 20 is arranged. The trough 21 in this case has a smaller depth than the trough 11 of the front steering roller 10. This ensures that the smaller diameter of the roller 20.2 of the rear steering roller 20 is compensated by the smaller depth of the trough 21. An overhang of both castors 10 and 20 on the bottom surface 2 is thus largely the same size, whereby the bottom surface 2 is arranged substantially parallel to the roll base 35, when the rolling suitcase 1 on all castors 10 and 20 and the other two corresponding castors 15 and 25 (FIGS. please refer Fig. 3 to 5 ) stands.

The front bottom edge 2.2 has in the representations of Fig. 1 and 2 a chamfer 33, which ensures that when fully swung back to the front castor 10 (shown in phantom) tilting of the trolley 1 by an angle of about α = 55 degrees is possible without the front bottom edge 2.2 touches the roll base 35. The trolley 1 is thus suitable in addition to the upright roles for tilted roles in the sense of a trolley. In Fig. 2 For illustration, a plane G is shown, which is a rolling mat in fully tilted state of the trolley 1, ie when this is around 55 Degree is tilted relative to a vertical. The plane G touches the fully pivoted backward roller 10 (shown in phantom) tangentially and includes an angle of α = 55 degrees with the roll base 35 and an angle β = 90 degrees - 55 degrees = 35 degrees.

Fig. 3 The case body 3 is composed of a front half shell 3.2 and a rear half shell 3.1, which are hingedly connected to each other on hinges 40 on the side surface 5.1. The front half shell 3.2 comprises the front main surface 4.2 and the half shell 3.1 the rear main surface 4.1. In the folded state, the half-shells 3.1 and 3.2 substantially abut one another in a plane H parallel to the main surfaces 4.1 and 4.2 and can be locked together by a locking mechanism 41, such as a suitcase buckle.

The bottom surface 2 is bordered by the bottom edges 2.1 to 2.4. The front bottom edge 2.2 is rectilinear, while the rear bottom edge 2.1 is slightly curved backwards. Along the lateral bottom edges 2.3 and 2.4 support structures 42.3 and 42.4 are formed in the form of elongated circular cylinders, which stabilize the half-shells 3.1 and 3.2. The support structures 42.3 and 42.4 extend substantially over the entire length of the bottom edges 2.3 and 2.4 and each have a part of the half-shell 3.1 and another part of the half-shell 3.2. In the closed state of the half-shells 3.1 and 3.2, the parts of the respective support structure 42.3 and 42.4 interlock and form the continuous support structures 42.3 and 42.4, respectively.

On the bottom surface 1, the front steering roller 10 and a further front steering roller 15 are arranged, wherein the steering roller 15 mirror-symmetrically with respect to the plane B of the steering roller 10 corresponds. The front castors 10 and 15 are disposed in the trough 11, respectively a trough 16, which troughs 11 and 16 in the embodiment of Fig. 3 are formed as cup-shaped inserts with a substantially semicircular floor plan. The inserts are arranged or secured in recesses of the bottom surface 2 on the half-shell 3.1 of the case body 3 and each have at one edge 11.4 and 16.4 a cantilevered flange 11.5 and 16.5. The respective Flange 11.5 and 16.5 rests on the bottom surface 2 of the trolley 1, while the troughs 11 and 16 extend into the case body 3 inside. The troughs 11 and 16 are open at the front main surface 4.2 or at the chamfer 33 of the front bottom edge 2.2 at the opening 11.6 or an opening 16.6 forward. The edges 11.4 and 16.4 each go into a boundary of the front openings 11.6 and 16.6, wherein the flanges continue 11.5 and 16.5 along the boundary and rest on the chamfer 33.

At the bottom 11.3 of the trough 11 and a bottom 16.3 of the trough 16, the associated steering rollers 10 and 16 are pivotally supported by the associated bearing 10.5 and a bearing 16.5 about the pivot axes C and a pivot axis C '. The pivot axes C and C 'are each arranged concentrically in the circle center of the semicircular troughs 11 and 16.

In Fig. 3 the support structure 10.4 of the steering roller 10 and a support structure 15.4 of the steering roller 15 are shown, on which the associated rollers 10.2 and 15.2 about the roll axes D and a roll axis D 'are freely rotatably mounted. The support structures 10.4 and 15.4 in turn are at the associated bearings 10.5 and 16.5 about the respective pivot axis C and C 'freely pivotally mounted in the wells 11 and 16, and thus on the bottom surface 2, stored. The support structures 10.4 and 15.4 are designed as two-legged, U-shaped bearing blocks, in each case between the legs, the rollers 10.2 and 15.2 are arranged. At the base of the U-shaped support structure 10.4 and 15.4 these are mounted on the associated bearings 10.5 and 15.5. The support structures 10.4 and 15.4 are designed such that they allow tilting for tilted rolling of the trolley 1. That is, the support structures 10.4 and 15.4 are designed such that in fully swung to the rear castors 10 and 15, the support structures 10.4 and 15.4 (as well as all other parts of the trolley 1) completely outside the plane G are arranged (see also Fig. 2 ). This condition is particularly fulfilled when the support structures 10.4 and 15.4 are designed such that they are arranged outside a plane which comprises the front bottom edge 2.2 and the rollers 10.2 and 15.2 tangentially touched in fully pivoted rearward position.

The rear steering roller 20 and a further rear steering roller 25 are arranged on the bottom surface 2, wherein the steering roller 25 mirror-symmetrically with respect to the plane B of the steering roller 20 corresponds. The rear castors 20 and 25 are disposed in the trough 21, respectively a trough 26, which troughs 21 and 26 are formed as cup-shaped inserts with a circular plan. The inserts are arranged or secured in recesses of the bottom surface 2 on the rear half-shell 3.2 of the case body 3 and each have at one edge 21.4 and 26.4 a cantilevered flange 21.5 and 26.5. The respective flange 21.5 and 26.5 rests on the bottom surface 2 of the rolling trunk 1, while the troughs 21 and 26 extend into the case body 3 inside. The troughs 21 and 26 are arranged completely on the bottom surface 2 and formed closed to all side surfaces 4.1, 4.2, 5.1 and 5.2 out.

At the bottom 21.3 of the trough 21 and a bottom 26.3 of the trough 26, the associated steering rollers 20 and 26 are pivotally supported by the respective associated bearings 20.5 and 26.5 about the pivot axes E and E ', wherein the pivot axes E and E' each concentric in the center of the circle the circular wells 21 and 26 are arranged. The troughs 21 and 26 are dimensioned such that just enough space for receiving the bearings 21.5 and 26.5 is present.

The distance 10.6 of the front castors 10 and 15 from the front main surface 4.2 is dimensioned such that the zughörigen rollers 10.2 and 15.2 can be pivoted beyond the front main surface 4.2 out. The distance 20.6 of the rear castors 20 and 25, however, is dimensioned such that the rollers 20.2 and 25.2 remain independent of the pivotal position in the area below the bottom surface 2. In addition, the rollers 20.2 and 25.2 of the rear castors 20 and 25 are smaller than the rollers 10.2 and 15.2 of the front castors 10 and 15. The depth of the wells 11 and 16 and 21 and 26 are therefore such that the bottom surface 2 is substantially parallel is arranged to a roll base 35 when all four rollers 10.2, 15.2, 20.2 and 25.2 touch the roll base 35.

In the concrete, in the Fig. 3 to 5 illustrated embodiment of the trolley 1, the distance 10.6 and 15.6 about 30mm and a supernatant of the castors 10, 15, 20 and 25 over the bottom surface 2 is about 33 mm. A distance 49 of the pivot axes C and C 'of the front castors 10 and 15 is about 292 mm while a distance 48 of the pivot axes E and E' of the rear castors 20 and 25 is about 360 mm. The rollers 10.2 and 15.2 of the castors 10 and 15 have at fully pivoted forward pivot position a projection 51 on the front main surface 4.2, which corresponds to about 15 mm. A distance 50 of the pivot axes C and E or C 'and E' in a direction perpendicular to a connecting line of the axes C and C 'or E and E' is about 176 mm.

Fig. 4 shows a side view of the trolley 1 of Fig. 3 in a plan view of a secondary surface 5.2. At the side surface 5.2 a carrying handle 43 is arranged. For illustration, the plane G is shown, which corresponds to a roll under tilted roles with maximum required tilt angle of α = 55 degrees. The rear main surface 4.1 is arched outwards, while the front main surface 4.2 is largely flat. The secondary surface 5.2 merges into the front main surface 4.2 at the front high edge 6.3 and into the rear main surface 4.2 at the rear high edge 6.4. At the bottom edge 2.4, at which the secondary surface 5.2 merges into the bottom surface 2, the support structure 42.4 can be seen, which is arranged as an elongated cylinder along the bottom edge 2.4. At a transition of the secondary surface 5.2 in a cover surface 44, a corresponding support structure 42.1 along a lid edge 44.1 is arranged.

Fig. 5 shows a plan view of the trolley 1 of Fig. 3 on the front main surface 4.2. The secondary surface 5.2 has a slight curvature to the outside, whereby the high edge 6.3 is slightly curved outwards to the side. The high edge 6.1 at a transition of the main surface 4.2 to the flat side surface 5.1 is straight. On the side surface 5.1 projections 45 are formed, on which the roller case 1 can be turned off, for example, when it was worn on the carrying handle 43 of the opposite side surface 5.2. As in Fig. 5 Recognizable, recesses are present at corners of the main surface 4.2, which share the view of the cylindrical support structures 42.1, 42.3 and 42.4 and a further support structure 42.2 along a lid edge 44.2 at the transition of the auxiliary surface 5.1 to the lid surface 44.

At the chamfer 33 at the front bottom edge 2.1, the openings 11.6 and 16.6 of the front wells 11 and 16 can be seen as well as projecting flanges 11.5 and 16.5. The pivot axes C and C 'of the front castors 10 and 15 are spaced by the distance 10.8 and a distance 15.8 from the side surface 5.1 and the side surface 5.2. The distances 10.8 and 15.8 are the same size and are about 4.8 times the radii 10.3 and 15.3 of the castors 10.2 and 15.2. The pivot axes E and E 'of the rear castors 20 and 25 are spaced by the distance 20.8 and a distance of 25.8 from the side surface 5.1 and 5.2, wherein the distances 20.8 and 25.8 are also the same size and about 4.5 times the radii 20.3 and 25.3 the rollers 20.2 and 25.2 amount. All distances of the pivot axes C, C 'and E, E' are dimensioned such that none of the rollers 10.2, 15.2, 20.2 and 25.2 of the castors 10, 15, 20 and 25 can be pivoted beyond one of the side surface 5.1 or 5.2 also. The comparatively large distances 10.8, 15.8 and 20.8 and 25.8 are due to the support structures 42.3 and 42.4 present at the bottom edges 2.3 and 2.4.

Centered on the main surface 4.2 an extendable pull handle 46 is arranged. In the presentation of the Fig. 5 the pull handle 46 is completely recessed in the case body 3, wherein a handle 46.1 of the pull handle 46 is arranged in a recess 47 provided for this purpose of the main surface 4.2. The recess 47 is designed to be open on the main surface 4.2, so that the handle 46.1 of the pull handle 46 can be grasped by a user when the position is completely lowered in the case body 3. The pull handle 46 is guided displaceably via a longitudinal guide 48 parallel to the main surface 4.2. The recess 47 is open at the top surface 43 so that the pull handle 46 can be extended parallel to the main surface 4.1 upwards. According to a preferred embodiment, a latching device is provided, which allows latching of the pull handle 46 in three different extended positions (locking device not shown).

It is understood that various embodiments of a rolling suitcase according to the invention can have a different mass than those specified here. In particular, the rear castors do not need to be arranged in troughs, for example and / or the front castors have a different projection over the bottom surface. However, in order to allow a substantially vertical upright standing of the trolley, in which the longitudinal axis A is arranged substantially perpendicular to the roll base, the supernatants of the front and rear castors over the bottom surface are to be matched. How this is achieved, for example by adjusting the roll diameter, depth of the wells or mass of the bearings, may differ depending on the embodiment of the rolling trunk. In particular, with a suitable arrangement of the front castors also no bevelling of the front bottom edge must be present in order to allow a sufficient tilting for tilted roles. For a maximum effective footprint embodiments are preferred in which under the inventive boundary conditions for the arrangement of the pivot axes and given by the specific design of the case constructive features, all castors are arranged as close as possible to the side walls of the suitcase.

Claims (13)

1. Rolling suitcase (1) for upright and tilted rolling, comprising a suitcase body (3) with a largely rectangular base surface (2), which is adjoined by two main surfaces (4.1, 4.2) and two secondary surfaces (5.1, 5.2) of the suitcase body (3), wherein a pulling handle (46) is provided on the main surface at the front (4.2), and the rolling suitcase (1) has four castors (10, 15, 20, 25), wherein the castors (10, 15, 20, 25) each have a running roller (10.2, 15.2, 20.2, 25.2), which can be rotated freely about a horizontal rolling axis (D, D', F, F'), and are mounted such that they can be pivoted about a pivot axis (C, C', E, E') arranged perpendicularly to the rolling axis (D, D', F, F'), and the pivot axes (C, C', E, E') here are arranged on the base surface (2) to be offset inwards from a secondary surface (5.1, 5.2) in nearer proximity in each case such that a distance (10.8, 15.8, 20.8, 25.8) between the pivot axes (C, C', E, E') and the secondary surfaces (5.1, 5.2) is greater than a radius (10.10, 15.10, 20.10, 25.10) of an outermost circumference (10.7, 15.7, 20.7, 25.7) of the pivot path of the castors (10, 15, 20, 25), wherein a distance (20.6, 25.6) between the pivot axes (E, E') of a rear pair of castors (20, 25), arranged on the rear main surface (4.1), and the rear main surface (4.1) is greater than a distance (10.6, 15.6) between the pivot axes (C, C') of a front pair of castors (10, 15), arranged on the front main surface (4.2), from the front main surface (4.2), characterized in that a radius (20.3, 25.3) of the running rollers (20.2, 25.2) of the rear pair of casters (20, 25) is smaller than a radius (10.3, 15.3) of the running rollers (10.2, 15.2) of the front pair of castors (10, 15), and wherein the distance (20.8, 25.8) between the pivot axes (E, E') of the rear pair of castors (20, 25) and the secondary surface (5.1, 5.2) in nearer proximity in each case is smaller than a distance (10.8, 15.8) between the pivot axes (C, C') of the front pair of casters (10, 15) and this secondary surface.
2. Rolling suitcase (1) according to Claim 1, characterized in that the distance (20.6, 25.6) between the pivot axes (E, E') of the rear pair of casters (20, 25) and the rear main surface (4.1) is greater than the radius (20.10, 25.10) of the outermost circumference (20.7, 25.7) of the pivot paths of the casters (20, 25).
3. Rolling suitcase (1) according to Claim 2, characterized in that the radius (10.3, 15.3) of the running rollers (10.2, 15.2) of the front pair of casters (10, 15) is at least 15%, in particular at least 25%, greater than the radius (20.3, 25.3) of the running rollers (20.2, 25.2) of the rear pair of casters (20, 25).
4. Rolling suitcase (1) according to one of Claims 1 to 3, characterized in that the front pair of casters (10, 15) are arranged in hollows (11, 16) on the base surface (2), and the associated running rollers (10.2, 15.2) are recessed, at least in part, in the hollows (11, 16).
5. Rolling suitcase (1) according to Claim 4, characterized in that the hollows (11, 16) of the front pair of casters (10, 15) are designed to be open in the outward direction on the front main surface (4.2) of the suitcase body (3).
6. Rolling suitcase (1) according to one of Claims 1 to 5, characterized in that the rear pair of casters (20, 25) are arranged in hollows (21, 26) on the base surface (2).
7. Rolling suitcase (1) according to Claim 6, characterized in that the hollows (21, 26) of the rear pair of casters (20, 25) are closed of off in the outward direction on the rear main surface (4.1).
8. Rolling suitcase (1) according to either of Claims 4 and 5 and either of Claims 6 and 7, characterized in that the hollows (11, 16) belonging to the front pair of casters (10, 15) are designed to be deeper than the hollows (21, 26) belonging to the rear pair of casters (20, 25).
9. Rolling suitcase (1) according to one of Claims 1 to 8, characterized in that the rolling axes (D, D', F, F') of the casters (10, 15, 20, 25) are spaced apart from the respectively associated pivot axes (C, C', E, E'), wherein in particular a vertical distance (10.9, 15.9) between the rolling axes (D, D') of the front pair of casters (10, 15) and the associated pivot axes (C, C') corresponds largely to the radius (10.3, 15.3) of the associated running rollers (10.2, 15.2).
10. Rolling suitcase (1) according to one of Claims 1 to 9, characterized in that all the casters (10, 15, 20, 25) can be pivoted fully and freely about the respectively associated pivot axis (C, C', E, E').
11. Rolling suitcase (1) according to one of Claims 1 to 10, characterized in that the pulling handle (46) is formed on the suitcase body (3) such that it can be pulled out parallel to the front main surface (4.2).
12. Rolling suitcase (1) according to Claim 11, characterized in that the pulling handle (46) has at least three latchable pull-out positions.
13. Rolling suitcase (1) according to one of Claims 1 to 12, characterized in that the suitcase body (3), on one of the secondary surfaces (5.2), has an additional carrying handle (43) for carrying the rolling suitcase (1) .

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