DE202019100005U1 - Transport trolley with a folding chassis - Google Patents

Abstract

Transport trolley (10) with a foldable chassis (16), wheels (20) arranged in the lower region of the chassis (16) and a transport element connecting section (32) for fastening at least one element (12) to be transported in a plane above the wheels ( 20), the chassis (16) being able to be brought into a compact, folded-in transport state and into a folded-out vehicle state, characterized in that at least one height adjustment actuating element (38) for activating a temporary height adjustment (36) for the transport element connection section (32) is provided and designed such that the height of the transport element connection section (32) can be temporarily adjusted by actuating the height adjustment actuating element (38).

Description

The invention relates to a trolley with a hinged chassis, which makes it possible to bring the trolley in a folded transport state and in an unfolded carriage state. The trolley can be used in particular to transport a transport box or other elements to be transported between two locations, in particular between a vehicle and a use, storage or pickup.

In DE 20 2015 001 440 U1 is described as a shopping trolley with hinged chassis dolly with a designated as a folding box transport box. The publication contains no drawings or other technical explanations regarding the technical realization of the shopping cart.

Out DE 197 07 744 C1 is a collapsible trolley with a cuboid transport box known. The transport box consists of a bottom, two side wall pairs and a lid. In the upper part of the transport box, a handle bar is pivotally mounted. In the lower part of the transport box two non-steerable wheels with a larger diameter and two steerable wheels with a smaller diameter are each secured by levers pivotally attached to the transport box. By pivoting the side walls, the handle bar and the lever with the wheels, the trolley can be folded into a suitcase shape.

Out EP 0 955 224 A2 a collapsible, hand-guided transport trolley is known, which is primarily used to transport boxes and boxes when shopping and at home. This trolley consists of a frame, which is formed from two main struts and two side struts, and two stacked shelves in the form of an upper floor and a lower floor within the frame. In each case a main strut and a secondary strut are connected to one another via a swivel-like cross point and form a scissor arrangement. The secondary struts are each mounted by means of a fixed pivot bearing near a rear end of the lower floor and the main strut is mounted on the sides of the lower floor by means of a swivel and sliding joint. A handle bar is pivotally mounted with side handle bar struts via swivel joints at the upper ends of the main struts, so that the floors and struts can be folded or folded out by pivoting the handle bar and an auxiliary strut articulated to the secondary strut and the handle bar strut is provided on each side. It is in EP 0 955 224 A2 also referred to a separate transport box, called a folding box, which should be usable with the transport trolley. In this respect, reference is made to hooks and tension belts in order to connect the opened or the folded folding box to the carriage.

The invention has for its object to provide a collapsible trolley improved in handling.

A transport trolley according to the invention has a foldable chassis, wheels arranged in the lower region of the chassis and a transport element connecting section for fastening at least one element to be transported in a plane above the wheels. The element to be transported can be, for example, a transport box or any other object. The chassis can be brought into a compact, folded-in transport state and a folded-out carriage state. The carriage state is suitable for using the transport carriage for transporting loose goods, in particular when a transport box or other container-like element is fastened in the transport element connecting section. At least one height adjustment actuating element for activating a temporary height adjustment for the transport element connecting section is provided and designed on the transport trolley according to the invention such that the height of the transport element connecting section can be temporarily adjusted by actuating the height adjusting actuating element. Temporary height adjustment means in particular that the height adjustment can be carried out at short notice, for example by the transport element connection section being able to be moved from a starting position to a higher or lower position for a short time with a simple handle or a simple foot movement or at the push of a button. The transport element connecting section can preferably be moved back into the starting position by an opposite movement. The height adjustment actuating element is preferably provided directly or indirectly on the chassis or a handle section connected to the chassis in order to enable simple actuation by hand or foot. The height adjustment range of the temporary height adjustment is preferably at least 5 cm, more preferably at least 10 cm and particularly preferably at least 15 cm or at least 20 cm. Values between 5 cm and 50 cm are particularly suitable as the temporary height adjustment range, preferably values between 10 cm and 40 cm. The background of the temporary height adjustment is the enabling of a user of the Transport trolley easy-to-use option to drive a transport box or other element that is attached to the transport element connection section with the transport trolley up to a support surface and to be able to park it there directly by actuating the height adjustment actuating element. This makes it possible to further increase the comfort of a transport trolley according to the invention, because after parking an element to be transported, the force acting on the chassis is significantly reduced, thus allowing the chassis to be lifted, pivoted, moved or moved in any other way, particularly if the chassis itself has a low weight. This aspect will be discussed in more detail below in conjunction with the dependent claims.

As a height adjustment actuating element, at least one lever is provided in a practical embodiment, which can be actuated by pressing and / or pulling. The pressing and / or pulling should be possible in particular by means of a hand or a foot, preferably in such a way that the trolley can be held at the same time and the temporary height adjustment can be actuated. This has the advantage that unintentional rolling or other movement of the trolley can be prevented by holding even if no parking brake is present or activated and / or if the temporary height adjustment is to be operated on a sloped surface.

In a further practical embodiment of the trolley according to the invention two levers are designed and arranged such that they can be used as push handles for the trolley. This is particularly the case when the push handles are in a comfortable height for an operator to move the car when standing by hand and operate. The height of such push handles is preferably in the range between 50 cm and 150 cm above the earth's surface, more preferably between 60 cm and 120 cm. For completeness, it should be noted that the two levers are preferably provided on the right and left sides of the trolley and can optionally be connected to each other, so that a U-shaped handlebar with two predominantly in the longitudinal and / or vertical direction extending levers and a predominantly transversely extending connecting element results.

Further advantages result if a lever is provided and the at least one lever is a swivel lever which is mounted pivotably about a swivel lever swivel axis. In this case, the pivotability of the pivoting lever can be used to provide a force and / or a moment that can be used to raise the transport element connecting section with an element that may be attached to be transported. The greater the distance between the actuating area of the lever and the pivoting lever pivot axis, the less force is to be exerted by an operator in order to raise the transport element connecting section against gravity with an element that may be attached to it.

In addition, if at least one stop is provided with which the height adjustment range of the temporary height adjustment device is adjustable in at least one direction (i.e., up or down), the trolley of the present invention can be preconfigured to further increase the comfort of use to a particular application. Thus, for example, with the aid of an upper stop and / or a lower stop, the maximum height (upper stop) and / or the minimum height (lower stop) of the temporary height adjustment can be adjusted so that the travel range is sufficiently large to a desired height to easily reach for a storage place. For example, when using a trolley according to the invention in conjunction with a motor vehicle, an upper stop and / or a lower stop can be used to configure the maximum height level of the temporary height adjustment so that the trolley with an attached, transporting element above a sill without contact in the trunk of the vehicle can be retracted so. By actuating the temporary height adjustment, the element to be transported on the loading edge - or preferably spaced from the loading edge directly in the trunk - can be lowered down and sold.

In a further practical embodiment, at least one vertical support and / or at least one counter support is provided. Particular advantages arise when at least one vertical support and at least one counter-support are provided such that one of the vertical support over the counter-support to an attacking portion extending lever is arranged in the manner of a rocker so that the vertical support is moved upwards by lowering the attack section , It is particularly preferred if two vertical supports, two counter supports and two levers are provided with corresponding engagement portions, so that there is a left operating unit and a right operating unit. In this case, the required forces can be distributed to two arms and / or two legs of an operator, whereby higher loads with the temporary Height adjustment can be operated or reduced with each arm force to a partial load (eg 50:50) is reduced.

With regard to the technical implementation options of the at least one vertical support and / or the at least one counter support, reference is made in particular to the possibility of realizing them by at least one threaded rod, a toothed rack and / or another profile element, the threaded rod, the toothed rack and / or that other profile element cooperates with a fixation device which can be locked thereon. A locking element is particularly suitable as a fixing device, for example a pawl which is spring-loaded against the threaded rod, the rack and / or the other profile element and whose engagement in the threaded rod, the rack and / or the other profile element can be temporarily released by actuating an actuating element is. Alternatively, the fixing device can also be designed in such a way that it is locked without a separate locking element by virtue of the fact that two elements are fixed relative to one another in their relative position in a first arrangement configuration due to their design and arrangement, whereas changing the arrangement configuration opens up a relative displaceability , These implementation options are particularly suitable for a counter support. It is particularly preferred if the counter support can be adjusted in height by simply moving an engagement section of a lever upwards, while the height of the vertical support is fixed. For the downward movement of the counter support, it is preferred if an operating element has to be actuated which requires a manual grip on the engagement section, so as to ensure that an operator holds the lever during the release and an undiminished lowering of the vertical support onto the Counteract minimum height with muscle strength, especially arm-muscle strength.

In a further practical embodiment of the transport vehicle according to the invention, a swivel mechanism is provided in order to move the chassis upwards and forwards when the transport element connection section is positioned on a contact surface (for example a transport surface of a motor vehicle, etc.) or when the transport element is fastened to it to be able to pivot about the transport element connection section. In this case, after the transport element connecting section or a transport element fastened thereon, the chassis can be swiveled simply and comfortably into a compact transport state, for example in order to transport and / or store an element to be transported together with the chassis in a motor vehicle or other vehicle can.

If the pivot mechanism has a rigid chassis pivot axis, a particularly simple manufacturability and high reliability, since the mechanical structure of the pivot mechanism is particularly simple.

In order to increase the functional reliability of a trolley according to the invention and in particular to prevent the chassis from inadvertently collapsing from the trolley state into the transport state, a locking mechanism is provided in a further practical embodiment, which is designed such that the trolley is only removed from the trolley state after the locking mechanism has been unlocked can be brought into the transport state. For this purpose, for example, a bolt can be provided, which engages in a corresponding opening in the chassis and thus secures the relative position of the chassis in the vehicle state, it being possible to unlock the locking mechanism by loosening the bolt. As a further safety measure, means can be provided which only allow the bolt to be released when the transport element connection section lies with a mass coupled to it on a contact surface, so that only the mass of the chassis has to be raised and pivoted.

Alternatively or in addition to a bolt as described above, the locking mechanism can also have an unlocking lever which can be actuated with the foot and / or with the hand of an operator in order to effect the unlocking. In this case, an unlocking can be carried out during the manual holding of the transport carriage, for example because it is currently on an inclined surface, in order to bring the transport carriage from the carriage state into the transport state.

The chassis of the trolley according to the invention may comprise in a top region a boom extending predominantly in the horizontal direction, which has a horizontally extending free space between at least one vertical support and the transport element connection section or at least between at least one vertical support and one at the transport element connection section attached attached transported element. In this case, an item to be transported can be moved over a loading edge of a motor vehicle away in a trunk of a motor vehicle, that the element to be transported in a completely arranged in the trunk position can be discontinued. This is particularly advantageous when the loading edge of a motor vehicle is arranged at a higher level than the loading area of the trunk on which the element to be transported is to be discontinued. For the sake of completeness, it is pointed out that a boom which extends predominantly in a horizontal direction can also be telescopic and adjustable in length, in particular so as to be able to reduce the length of the boom to a minimum if not required, and thus to bring the center of gravity of the transport carriage as close as possible to hold on the vertical supports. The cantilever preferably extends over at least 10 cm, more preferably over at least 15 cm, and most preferably over at least 20 cm, 25 cm or 30 cm. If it is a length-adjustable boom, this is preferably adjustable in a range between 0 cm and 50 cm, more preferably between 0 cm and 30 cm or between 10 cm and 30 cm.

In a further practical embodiment of the trolley according to the invention, the at least one vertical support and / or the at least one counter-support is designed to be height-adjustable in its extension direction. In this regard, it has proven to be practical if a telescoping design with at least two relative to each other relatively movable profiles is provided for forming the height adjustment of the vertical supports, for example, two cylindrical, at least partially inter-engaging rods. If both the vertical support and the counter supports are adjustable in height, considerable height differences can be realized by alternately height adjustment upwards with suitable telescopic training.

If the at least one vertical support and / or the at least one counter support is designed such that it automatically assumes a shortened overall height while the chassis is being moved from the wagon state to the transport state, the usability of a transport wagon according to the invention, in particular in connection with motor vehicles, can be further increased be because folding the chassis in this case requires a lower opening height of a trunk. In this case, the assumption of the shortened overall height is preferably provided such that during the pivoting of the chassis due to the gravitational force, one or more telescopically designed relatively movable profiles to move towards each other.

In conjunction with at least one vertical support and / or at least one counter support, which can automatically assume a shortened overall height when moving the chassis from the car state to the transport state, it is preferred if a height adjustment locking device is provided, which must first be solved so the height of the vertical support and / or the counter-support can be adjusted in at least one direction, in particular so that the height of the vertical support and / or the counter-support increase and the respective support can be fixed in the increased height. As a height adjustment locking device is particularly suitable an actuating element, by means of which by suitable means, for example a Bowden cable, a locking element is movable.

In a further practical embodiment of a trolley according to the invention, a lower element of the chassis by means of a hinged strut and a frame locking device relative to a vertical support can be fixed, whereby a relative mobility between the lower element of the chassis and the vertical support can be made possible by releasing the frame locking device , A rack-locking device can increase the rigidity of the chassis in the car condition of the trolley according to the invention and reduce the space required for the chassis in the transport state of the trolley.

Alternatively, it is possible to provide a foldable strut with at least one joint, which is fixed as standard by means of a strut locking device in order to achieve a stiffness of the chassis as described above, with a relative mobility as described above being achievable by releasing the strut locking device.

The operation of the trolley according to the invention can be further increased if at least one control element for a counter-support, a height adjustment locking device, a strut-locking device and / or rack-locking device is provided on the chassis, especially if one or more such controls in the range of push handles and / or a height adjustment actuator are arranged. Preferably, three controls are provided on the trolley according to the invention, wherein a separate control element for a counter-support, an operating element for a height adjustment locking device and / or an operating element for a rack-locking device is provided. In this case results in a high functionality and a high ease of use.

In further practical embodiments, a support bracket is provided as a support for a transport element connection portion, in particular a hinged trained support bracket, which from a folded-out in a folded state is movable. With such a support bracket, the rigidity of the trolley and in particular the probability of a vibration-induced failure of an element to be transported, a transport box or a cantilever can be significantly reduced.

In another practical embodiment, a motor height adjustment is provided, in particular an adjusting device with at least one electric motor as a drive element. In such a case, a structurally simple construction can be realized, in particular a design dispensing with counter supports.

If a quick height adjustment is provided, by means of which the height level in the lowest position of the element to be transported or a transport box is quickly adapted, a time-saving pre-adjustment or adaptation of the trolley can be made, especially if a manual adjustment of the height level by lifting and / Lowering the height level is made possible by appropriate attacking and moving a transport box or the element to be transported or a cantilever.

• 1 einen Transportwagen in einem ersten Wagenzustand in einer isometrischen Darstellung,
• 2 den Transportwagen aus 1 in einem zweiten Wagenzustand in einer isometrischen Darstellung,
• 3 den Transportwagen aus den 1 und 2 während des Zusammenlegens in einer isometrischen Darstellung,
• 4 den Transportwagen aus den 1 bis 3 in einem eingeklappten Transportzustand in einer isometrischen Darstellung,
• 5 eine weitere Ausführungsform eines Transportwagens,
• 6 eine weitere Ausführungsform eines Transportwagens mit einem optionalen, klappbaren Stützbügel und
• 7 eine weitere Ausführungsform eines Transportwagens mit einer optionalen motorisch angetriebenen Höhenverstellung.

Further practical embodiments and advantages of the invention are described below in connection with the drawings. Show it:

• 1 a transport carriage in a first carriage state in an isometric representation,
• 2 the dolly 1 in a second carriage state in an isometric representation,
• 3 the dolly from the 1 and 2 while merging in an isometric view,
• 4 the dolly from the 1 to 3 in a folded transport state in an isometric view,
• 5 another embodiment of a trolley,
• 6 a further embodiment of a transport carriage with an optional, foldable support bracket and
• 7 a further embodiment of a transport carriage with an optional motor-driven height adjustment.

The 1 to 4 show a non-limiting embodiment of the invention of a trolley 10 on which as an element to be transported 12 a transport box 14 is attached. The trolley includes a folding chassis 16 with a lower frame 18 and attached wheels 20 , two front vertical supports 22 , two rear vertical supports 24 and a push bar 26 ,

The front wheels 20 are smaller in the embodiment and designed as steerable wheels, the rear wheels 20 are larger and designed as non-steerable wheels. Alternatively, it is also possible to interchange the arrangement of the steerable and non-steerable wheels or to arrange them in any other way in order to achieve a desired pushing and steering behavior.

The push bar 26 is as a U-shaped element with two longitudinally extending levers 28 and a transversely extending connecting rod 30 educated.

The transport box 14 is fixed in the embodiment shown with the folding chassis 16 connected. As a transport element connection section 32 serve in this embodiment only on the outside of the transport box 14 arranged bolts 34 , which are formed so that they form a pivot axis S and pivoting of the chassis 16 in the out 3 enable apparent direction.

For the sake of completeness, it is pointed out that the transport box 14 alternatively also detachable with the foldable chassis 16 may be connected, in particular by clips, a quick-release device and / or prongs (similar to a forklift) are provided, the underside of a transport box 14 attack, are inserted in corresponding recesses or otherwise solvable or unsolvable with the transport box 14 are connected.

As if from a synopsis of 1 and 2 with the 3 and 4 it can be seen, the entire chassis can be 16 to pivot about the pivot axis S when the weight of the transport box 14 is supported, for example, if the transport box 14 on one (in the 3 and 4 not shown) footprint stands up. As such footprint can serve for example a cargo area of a motor vehicle.

The push bar 26 is pivotally mounted about a lever pivot axis H. As a result, when a downward pressure force is exerted in the direction of the arrow D, as in 2 shown, a marked in the direction of arrow A lifting force on the pivot pin and the transport box 14 be exercised to the transport box 14 temporarily or permanently raise. The arrangement of the push bar 26 with storage over the lever axis H and opposite the connecting rod 30 arranged connection to the transport box 14 therefore forms a temporary height adjustment 36 by pressing the as height adjustment actuator 38 serving handlebar 26 (or as height adjustment actuators 38 serving levers 28 ) the transport member attachment portion 32 together with the transport box 14 be able to adjust in height at short notice.

2 shows the transport box 14 in the highest position of the temporary height adjustment 36 . 1 shows the transport box 14 in the lowest position of the temporary height adjustment 36 , For pushing in the transport box 14 In an open trunk of a motor vehicle, for example, the transport box can 14 by means of the temporary height adjustment 36 in the in 2 shown state are brought immediately before the rear of the motor vehicle will reach and until the transport box 14 is positioned at the desired storage location in the trunk. Then the transport box 14 drained and thus into the in 1 shown position are brought.

It is then possible, if it allows the design of the corresponding motor vehicle, in particular the height of the trunk, the chassis 16 as in 3 shown to pivot to the trolley in the in 4 shown to bring compact transport condition. In this condition is for the chassis 16 Little more space required than for the transport crate 14 even because it is compactly positioned around it.

The front vertical supports 22 are formed in the embodiment shown by a lower profile and a cantilever 42 trained upper profile, which are relative to each other so far relatively movable, as the cantilever 42 by pushing the push bar 26 in the direction of the arrow D in 2 is moved upwards. Optionally, there is a bolt on each vertical support 40 provided to the cantilevers 42 at the current height level with respect to the lower profile of the vertical support 22 to be able to fix and so the current height level of the transport box 14 in the in 1 or 2 shown situation also continue to hold when no force according to the arrow D is exercised by an operator. Then a permanent height adjustment is possible. For remote operation of the bolt 40 are preferably optional controls 44 on the handlebar 26 provided, for example, a cooperating with a Bowden lever, by the actuation of the bolt 40 can be solved. For the sake of completeness, it is pointed out that even one bar 40 may be provided, preferably one on both vertical supports 22 simultaneously acting latch 40 ,

To achieve rigidity of the lower frame 18 opposite the front vertical supports 22 is a support strut 46 with one latch each 48 intended. By releasing the latch 48 also on the push handle 26 arranged, separate control element 44 can the support strut 46 can be solved, especially if the trolley is of the car condition according to the 1 and 2 in the compact transport state according to the 3 and 4 to be brought.

The rear vertical supports serving as counter supports 24 are each formed by a lower profile and an upper profile in the embodiment shown 52 which are relatively movable to one another in so far as the upper profile 52 by pulling the push handle 26 in a direction opposite to the arrow D in 2 is movable upwards. In this context, there are still more bars 50 referenced on the rear vertical supports 24 are provided and also via a push handle 26 arranged, separate control element 44 are operable. These bars 50 are part of a device for configuring the height level of the counter supports. In the embodiment shown, this device is designed such that an adjustment of the upper profiles 52 upwards without operating the latches 50 by simply pulling the handlebar 26 is possible upwards, whereas loosening the latch 50 is required to support the height level of the counter 24 to lower. Above that is optional on the push handle 26 still as a control 44 An optional main lever is provided, which enables all latches 40 . 48 . 50 solve at the same time to the dolly 10 to be swiveled comfortably from the carriage state into the compact transport state with one actuation process. The handlebar folds when it is folded 26 down, the cantilever arms 42 drive into the front vertical supports 22 a, and while panning from the in 2 about the in 3 in the in 4 shown position also pivots the frame 18 relative to the vertical supports 22 and the counter supports 24 such that the in 4 shown, compact position (transport position) results.

5 shows a further embodiment of a transport carriage 10 which of the in the 1-4 shown embodiment largely corresponds. For identical or at least functionally identical elements, the following are therefore used in conjunction with 5 the same reference numerals are used as in the 1-4 , whereby the differences are mainly dealt with below. Unless otherwise described or apparent from the drawings, the design corresponds Design of the trolley 5 the design of the trolley from the 1-4 ,

The in 5 shown dolly 10 has as height adjustment actuators 38 two levers 28 on, which are not connected. This allows them in the transport state - analogous to 4 - continue to pivot, so that the dolly 10 overall, folds up more compact.

The support struts 46 point in the embodiment according to 5 one joint each 54 on by default in the in 5 shown position by means of a respective strut locking device 58 is fixed. Using one as an operating element 44 serving actuator 56 , which is designed as a gripping lever in this embodiment, can fix the joint 54 release by the strut locking device 58 opens to fold up the dolly 10 - analogous to that in the 3 and 4 kinematics shown - a relative movement (pivoting) of the lower frame 18 opposite the front vertical support 22 to enable. To release the fixation of the joint 54 must be the actuator 56 can be operated by pulling in the embodiment shown.

Optionally, a tensioning element (not shown) can be provided and arranged so that when the trolley is opened 10 the support strut in the car condition 46 in the in 5 shown stretched state drives and thus specifies a target position as the standard position.

At the in 5 shown embodiment are on the levers 28 one control each 44 for the bar 40 and one control each 44 for the bar 50 provided, even if in the 5 only one control element is shown as an example. Preferably, these two controls on the levers 28 each arranged so that only one of these two controls can be actuated to avoid for safety reasons that at the same time the fixation between the respective cantilever 42 and the front vertical support 22 as well as between the upper profile 52 and the rear vertical support 24 is solved. Because this would mean that the transport box 14 gravity down to the lowest height level would "crash". Of course, it is possible to ensure this in any other way.

In the 6 and 7 are further embodiments of a transport trolley 10 shown, on each of which optional, additional technical functions are implemented. The technical functions shown in all figures can be combined - also individually - with other technical functions.

In the embodiment according to 6 is a support bracket 60 provided, which - here about a rotation axis D - is pivotable such that it is arranged from a folded state in which the bracket is arranged substantially parallel to the bottom surface of the transport box (in 6 characterized by the dashed support bracket 60 ') can be pivoted according to the arrow P in an unfolded state. In the unfolded state, the support bracket is supported 60 on the lower frame 18 from, so that provided by the support bracket an as needed activatable front support. The unfolding of the support bracket 60 is especially for transporting heavy loads with the trolley 10 useful to high, on the cantilevers 42 To avoid acting bending forces by an additional, front support. As a result, especially dynamic forces, which can occur especially when driving on uneven and / or moving footprints, better absorbed by the frame and unwanted vibrations of the transport box 14 or of the element to be transported 12 largely avoided.

The double arrows h schematically show that the height of the support bracket extending in the vertical direction 60 adjustable and thus adaptable to the respective transport situation.

In the folded state and / or in the unfolded state, a lock (not shown) is preferably provided around the support bracket 60 in this position to fix securely and movements or vibrations of the support bracket 60 counteract.

Also preferred is a return mechanism for the support bracket 60 provide, with a slight lifting of the support bracket 60 in the unfolded state and / or by pressing a suitable unlocking a collapse of the support bracket 60 effected in the state shown with 60`. This can be realized, for example, by means of a restoring spring, which when unfolding the support bracket 60 is biased.

Alternatively or in addition to a return mechanism, a complete or at least partial passive folding by means of a bumper of a motor vehicle can also be provided by the cantilevers 42 together with the transport box 14 or with the element to be transported 12 raised and the dolly 10 so is retracted into a trunk of a motor vehicle that the support bracket 60 is brought into the folded state with the help of the bumper of the motor vehicle. For this purpose, the support bracket front side have a suitable design, in particular a panel or a design of a shock-resistant material (foam, rubber coating other elastic material, etc.) that the bumper by the contact with the support bracket 60 not damaged.

Alternatively or in addition, it can be provided that the support bracket when extending an element to be transported 12 or a transport box 14 automatically, semi-automatically or manually activated from the folded state to the unfolded state.

In the embodiment according to 7 is considered a temporary height adjustment 36 a shown only schematically, optional motor height adjustment 62 intended. This consists of two parallel spindle drives 64 , which are visualized only by dashed lines and are driven either via a common motor, in particular an electric motor (not shown) or via separate, parallel-connected motors. With the help of one motor or two or more motors, a structurally simple temporary height adjustment can be realized. This can especially on counter struts 24 be omitted, as in the embodiments described above with as height adjustment actuators 38 serving levers 28 are provided. Instead, the levers 28 In this embodiment, only provided as a push bar, and for actuating the one or more motors is on one of the levers 28 a control 44 intended.

In a further embodiment, not shown, in particular in connection with a temporary height adjustment 36 who have a lever 36 as a height adjustment actuator 26 has a quick height adjustment can be provided. A quick height adjustment means a device that enables the height level to be in the lowest position of the element to be transported 12 or a transport box 14 adjust at short notice, for example by using the transport box 14 by lifting and pulling it up to a higher lowest position. For this purpose, for example, at least one, each on the cantilever arms 42 provided locking ball or latch (not shown) can be provided for locking the respective cantilever arms 42 opposite the vertical supports 22 in different positions relative to the vertical supports 22 can engage in openings formed in the vertical supports. One or more control elements (not shown) for the latching ball (s) or latches can be provided, which must be activated in order to carry out a height adjustment as described above. In particular, protruding pins can be used as actuating elements, which have to be pressed in in order to temporarily release the locking balls or bolts and to be able to use the quick height adjustment. In the embodiment not shown, rear vertical supports are preferably used as counter bearings 24 analog to the 1 . 2 and 5 intended.

The features of the invention disclosed in the present description, in the drawings and in the claims may be essential both individually and in any desired combinations for the realization of the invention in its various embodiments. The invention is not limited to the described embodiments. It can be varied within the scope of the claims and taking into account the knowledge of the person skilled in the art.

For example, it should be noted that by a telescopic design of a front vertical support 22 and / or a rear vertical support 24 and a plurality of height-adjustable supports mounted thereon, an almost arbitrary height adjustment range can be realized. Likewise, the skilled person can use any other, similarly acting elements instead of the elements described in the embodiments, for example, an electric, pneumatic or other mechanical drive instead of a Bowden cable, etc.

LIST OF REFERENCE NUMBERS

10

Dolly

12

element to be transported

14

transport case

16

chassis

18

frame

20

front and rear wheels

22

front vertical support

24

rear vertical supports / counter supports

26

push bar

28

lever

30

connecting rod

32

Transport element connecting section

34

bolt

36

Temporary height adjustment

38

Height adjustment actuator

40

bars

42

cantilever

44

operating element

46

support strut

48

bars

50

bars

52

upper profile

54

joint

56

actuator

58

Strut locking

60

support bracket

62

Motor height adjustment

64

spindle drive

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 202015001440 U1 [0002]
• DE 19707744 C1 [0003]
• EP 0955224 A2 [0004]

Claims (23)

Transport trolley (10) with a hinged chassis (16), wheels (20) arranged in the lower area of the chassis (16) and a transport element attachment section (32) for fastening at least one element (12) to be transported in a plane above the wheels ( 20), wherein the chassis (16) can be brought into a compact, folded transport state and in an unfolded carriage state, characterized in that at least one height adjustment actuating element (38) for activating a temporary height adjustment (36) for the transport element attachment portion (32) is provided and designed such that by actuating the height adjustment actuating element (38) of the transport element connecting portion (32) is temporarily height adjustable. Transport trolley (10) according to the preceding claim, characterized in that at least one lever (28) is provided as the height adjustment actuating element (38) which can be actuated by pressing and / or pulling. Transport trolley (10) according to the preceding claim, characterized in that two levers (28) are designed and arranged in such a way that they can be used as push bars (26) for the transport trolley (10). Transport trolley (10) according to one of the two preceding claims, characterized in that the at least one lever (28) is a pivot lever which is pivotally mounted about a pivot lever pivot axis. Transport trolley (10) according to one of the preceding claims, characterized in that at least one stop is provided with which the height adjustment range of the temporary height adjustment device (36) can be adjusted in at least one direction. Transport trolley (10) according to one of the preceding claims, characterized in that at least one vertical support (22) and / or at least one counter support (24) is provided Trolley (10) according to the preceding claim, characterized in that the at least one vertical support and / or the at least one counter-support is realized by at least one threaded rod, a rack and / or another profile element, wherein the threaded rod, the rack and / or the Other profile element cooperates with a lockable thereto fixing device. A trolley (10) according to any one of the preceding claims, characterized in that a swivel mechanism is provided to the chassis (16) at a position on a transport surface upstanding position of the transport element connection portion (32) or an attached transport element (12) for taking the Transport state to be able to pivot upwards and forwards over the transport element connection portion (32). A trolley (10) according to the preceding claim, characterized in that the pivot mechanism comprises a rigid chassis pivot axis. A trolley (10) according to any one of the preceding claims, characterized in that a locking mechanism is provided which is designed such that only after unlocking the locking mechanism, the chassis (16) can be brought from the car condition in the transport state. A trolley (10) according to the preceding claim, characterized in that the locking mechanism comprises an unlocking lever which is operable with the foot and / or by the hand of an operator to effect the unlocking. Transport trolley (10) according to one of the preceding claims, characterized in that the chassis (16) in an upper region has a predominantly extending in the horizontal direction boom which extends in a horizontal direction between free space between at least one vertical support (22) and the Transport element connecting portion (32) or between at least one vertical support (22) and one of the transport element-connecting portion (32) attached to be transported element (12). A trolley according to the preceding claim, characterized in that the at least one vertical support (22) and / or the at least one counter-support (24) is designed to be height-adjustable in its extension direction. A trolley (10) according to the preceding claim, characterized in that for the formation of the height adjustment of the at least one vertical support (22) and / or the at least one counter-support (24) a telescopic design is provided with at least two mutually relatively movable profiles. Transport trolley (10) according to one of the two preceding claims, characterized characterized in that the at least one vertical support (22) and / or the at least one counter support (24) is designed such that it automatically assumes a shortened overall height during the movement of the chassis (16) from the carriage state into the transport state. A trolley (10) according to the preceding claim, characterized in that a height adjustment locking device is provided, which must first be solved so that the vertical support (22) and / or the counter-support (24) can be adjusted in height in at least one direction , Transport trolley (10) according to one of the preceding claims, characterized in that a lower element of the chassis (16) can be fixed by means of at least one foldable strut and a frame locking device in relation to a vertical support (22) or a counter support (24), whereby by a Releasing the frame locking device a relative mobility between the lower element of the chassis (16) and the vertical support (22) or between the lower element of the chassis (16) and the counter support (24) can be made possible. Transport trolley (10) according to one of the preceding claims, characterized in that a lower element of the chassis (16) by means of at least one foldable strut with at least one joint (54) and a strut locking device (58) opposite a vertical support (22) or one Counter support (24) is fixed, wherein by releasing the strut locking device (58) a relative mobility between the lower element of the chassis (16) and the vertical support (22) or between the lower element of the chassis (16) and the counter support (24 ) can be made possible. Transport trolley (10) according to one of the preceding claims, characterized in that at least one operating element (44) for a height adjustment locking device, a strut locking device (58) and / or a frame locking device is provided on the chassis (16). Transport trolley (10) according to one of the preceding claims, characterized in that a support bracket (60) is provided as a support for a transport element connecting section (32). Transport trolley (10) according to the preceding claim, characterized in that the support bracket (60) is designed to be foldable and can be moved from an unfolded to a folded state. Transport trolley (10) according to one of the preceding claims, characterized in that a motor height adjustment (62) is provided. A trolley (10) according to any one of the preceding claims, characterized in that a quick height adjustment is provided by means of which the height level in the lowest position of the element (12) to be transported or a transport box (14) is adapted to short-term.

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