NL2027978B1 - Horticulture trolley with slide bodies underneath a first and/or second head end of its frame. - Google Patents

Abstract

A horticulture trolley (1) comprises floor-wheels (5a, 5b) with bottom ends of running surfaces lying at a first height level (h1), and track-wheels (4a, 4c) with bottom ends of running surfaces lying at a second height level (h2) that is higherthan the first height level (h1). One or more slide bodies (SB) are provided underneath a first and/or second head end of the frame (2) configured for carrying the trolley by sliding over a front part of a high-level second surface during transitions of the trolley from low-level first surfaces onto high-level second surfaces and vice versa, wherein each slide body (SB) has a lower sliding surface that extends in the longitudinal direction, which sliding surface comprises at least a centre portion (CHP) that extends horizontally at a same second height level (h2) as the bottom ends of the running surfaces of the high-level track-wheels (4a, 4c).

Description

P34953NLOO/RR Title: Horticulture trolley with slide bodies underneath a first and/or second head end of its frame.

FIELD OF THE INVENTION The present invention relates to horticulture trolleys that are suitable for driving over different heights and/or types of surfaces, in particular guiding tracks and/or corridors, like pipe-rails and/or paved floors, that extend in between and along plant growing paths.

BACKGROUND TO THE INVENTION Horticulture pipe-rail trolleys are well known in horticulture to be used during the growing of plants for all kinds of operations, like crop care, protection and harvesting. For example, greenhouses for the commercial growing and/or harvesting of plants, mostly have a standard lay-out with a concrete corridor and a large number of track paths perpendicular thereto with rows of plants growing at both sides thereof. Along each track path a guiding track extends, for example in the form of a pair of pipe-rails, that in particular serve as heating pipe. At head end parts of such pipe-rail tracks, turn-around pipe portions that connect left and right ones of the pairs of pipe-rails are frequently present such that a heating medium can flow from one of the pipe-rails towards another. The turn-around pipe portions and end portions of the pipe-rail tracks rest upon an edge of the concrete corridor, whereas the rest of the pipe-rail tracks rest upon support feet such that they are supported spaced above a ground surface of the track paths. During growing of the plants, the trolleys can be used for performing all kinds of operations thereto, while being slowly or stepwise driven over the pipe-rails.

Some of such horticulture pipe-rail trolleys are known to have a trolley frame that merely is equipped with pairs of combined track/floor-wheels in the form of flange wheels. Such flange wheels each comprise a cylindrical roller part and an outer flange part. The flange parts are positioned spaced at a distance that is slightly larger than an outer width of the pipe-rails for keeping the trolley centred during driving with the roller parts over the pipe-rails. The flange parts further comprise a tread/running surface with which they can be driven over the concrete corridor during transitions between sets of pipe-rails of adjacent plant growing paths. With this the outer radius of the flange part minus the outer radius of the roller part is chosen equal to the diameter of the pipe-rail, such that a stepless transition is possible when driving from the tracks onto the floor and vice versa. This however has the disadvantage that the flange parts are not particularly suitable for driving over for example concrete, and are prone to wear and getting damaged. Furthermore, additional measures then need to be taken for being able to steer the trolley over the corridor, like making a left and right one of the track/floor wheels individually drivable or making at least one pair of the steerable.

Inthe alternative, it is also known to equip such horticulture pipe-rail trolleys with distinctive sets of front-end and back-end pairs of floor-wheels and track-wheels. For example, EP-

3.259.982 shows such a trolley, that is used to be fully loaded with vegetables during harvesting. The floor-wheels here are formed by swivel wheels with running surfaces that are made from relative hard plastic material in order to be able to carry heavy weights and in order to be wear-resistant when driving and steering over the concrete corridors. The track- wheels here are formed by flange wheels that are made out of suitable softer plastic material that gives them good grip when rolling over the pipe-rails. The front-end and back-end pairs of flange wheels are positioned such high and/or are equipped with such small flange parts that bottom ends of running surfaces of those flange parts lie at a higher level than bottom ends of the running surfaces of the swivel wheels. Thus, it is guaranteed that the flange parts of the front-end and back-end pairs of flange wheels do not get to touch the concrete floor during driving over the concrete floor. The front-end and back-end pairs of swivel wheels and flange wheels are all of a non-driven type. For driving the horticulture trolley a pair of electromotors and additional flange wheels is provided at a central position underneath the frame. With this the centre pair of flange wheels is positioned with its rotation axes at a same height as the front-end and back-end pairs of flange wheels, and with same dimensioned roller parts, such that it can drive the trolley forward and backwards over the pipe-rails. In order to also be able to drive the trolley forwards and backwards over the floor, they are equipped with such larger dimensioned flange parts that bottom ends of running surfaces of those flange parts lie at a same level as the bottom ends of the running surfaces of the swivel wheels. Thus, it is guaranteed that the flange parts of the centre pair of flange wheels simultaneously get to touch the concrete floor during driving over the concrete floor.

This construction, however, still has some important drawbacks. When driving from the floor onto the pipe-rails it occurs for the back-end pairs of wheels that the swivel-wheels already ride off the floor without the flange-wheels being yet carried by the pipe-rails. This may damage the swivel wheels and also the floor edge. Furthermore, it makes the transition from the floor onto the pipe-rails more difficult, because of a bump then having to be taken by the back-end pair of flange wheels. Furthermore, it may also damage the flange parts of those back-end flange wheels. Because of the swivel wheels dropping of the floor, the back end of the trolley all of a sudden is no longer supported downwards at all. This may cause the trolley to all of a sudden bump with its back-end flange parts against the concrete. When driving from the pipe-rails onto the floor a similar disadvantage occurs. Then for the at that time foremost pairs of wheels it goes that the flange wheels already ride off the pipe-rails without the swivel wheels being yet carried by the floor. This makes the transition from the pipe-rails onto the floor more difficult, because of a bump having to be taken by the swivel wheels. This may damage the swivel wheels and also the floor edge. Furthermore, it may also damage the flange parts of the flange wheels. Because of the flange wheels dropping of the pipe-rails, the at that time foremost end of the trolley all of a sudden is no longer supported downwards at all. This may cause the trolley to all of sudden hit with its at that time foremost flange parts against the concrete.

BRIEF DESCRIPTION OF THE INVENTION The present invention aims to overcome those disadvantages at least partly or to provide a usable alternative. In particular, the present invention aims to provide a horticulture trolley that is able to easily transit between paved/concrete floors and pipe-rails in a reliable and efficient manner, without damaging floors and/or pipe-rails and/or wheels, even when the trolley is heavily loaded. According to the present invention, this aim is achieved by a horticulture trolley for driving over different heights and/or types of surfaces, like paved floors and pipe-rails, according to claim 1. The trolley comprises a trolley frame that has a longitudinal direction with a first and second head end, and a sideways direction perpendicular to the longitudinal direction with a left and right side. First-end and second-end pairs of low-level floor-wheels are provided that are configured and positioned for carrying the trolley by rolling over low-level first surfaces, like a paved floor, with bottom ends of running surfaces of those low-level floor-wheels lying at a first height level. Furthermore, first-end and second-end pairs of high-level track-wheels are provided that are configured and positioned for carrying the trolley by rolling over high- level second surfaces, like a guiding track, with bottom ends of running surfaces of those high-level track-wheels lying at a second height level that is higher than the first height level.

According to the inventive thought one or more first-end and/or second-end slide bodies are provided underneath the first and/or second head end of the frame configured for carrying the trolley by sliding over a front part of a high-level second surface during transitions of the trolley from low-level first surfaces onto high-level second surfaces and vice versa, wherein each slide body has a lower sliding surface that extends in the longitudinal direction, which sliding surface comprises at least a centre portion that extends horizontally at a same second height level as the bottom ends of the running surfaces of the high-level track-wheels.

Thus, a user-friendly horticulture trolley is provided that can quickly ride of a first surface onto a higher levelled second surface and back off again, even when the trolley is relative large and heavy and/or heavily loaded. Those back-and-forth transits now can be easily made without this requiring too much additional effort from a person that has to push the trolley forwards from the first onto the second surface or pull the trolley backwards from the second onto the first surface, and/or, in the case of the trolley being electrically driven, without this requiring too much additional effort from driving electromotors that are provided and configured to drive the track- and/or floor-wheels for driving the trolley.

When driving from the floor onto the pipe-rails it can now always be guaranteed that the trolley remains well supported at both of its head ends. In the situation where the floor-wheels ride off the first surface while the track-wheels are not yet being carried by the second surface, as well as in the situations where the track-wheels ride of the second surface while the floor-wheels are not yet being carried by the first surface, the slide bodies are well able to take over the full weight of that head end of the trolley by smoothly sliding over the second surface. A dropping off no longer occurs, and no bumps must be taken during said transitions. This protects the floor- and track-wheels as well as an angled downwardly dropping front edge of the first surface.

Furthermore, it gives a designer more freedom in positioning the respective floor- and track- wheels relative to each other underneath the trolley frame. For example, the relative spacing between the corresponding neighbouring track- and floor-wheels now can easily be made larger, and it now even has become possible to place the floor-wheels closer to the head ends of the frame than the track-wheels.

Also, it gives a designer more freedom in the number of track-wheels that needs to be provided. In particular, a centre pair of track-wheels can now easily be dispensed with, while still being able to properly distribute the weight of a relative large and heavy and/or heavily loaded trolley during said transitions.

In an advantageous preferred further embodiment, the first- and/or second-end pair of low- level floor-wheels can be positioned spaced apart over a distance in the longitudinal direction from their corresponding first- and/or second-end pair of high-level track-wheels, wherein each slide body has its sliding surface extend in the longitudinal direction at least over the spaced apart distance between the pair(s) of low-level floor-wheels and high-level track- wheels. Thus, it is guaranteed that independent of an amount of overlap between front 5 portions of the first and second surfaces, like for example the amount of overlap between turn-around head end parts of pipe-rail tracks that rests upon a front edge of a floor, that trolley head end is able to smoothly slide over its slide body during the entire length of all transitional movements therebetween.

In addition, each slide body may have its sliding surface extend in the longitudinal direction past by the spaced apart distance between the pair(s) of low-level floor-wheels and high-level track-wheels. This has the advantage that the added sliding support already may start just before the at that time foremost one of the pairs of spaced apart wheels reaches the transition between the first and second surfaces.

In a preferred embodiment, each sliding surface further may comprise upwardly angled or curved end portions. This shall cause the sliding surfaces to smoothly start sliding over the second surface even in cases of tolerance differences in the respective heights between the first and second surfaces. Preferably, those upwardly angled or curved end portions then can be provided at the positions past by the spaced apart pair(s) of low-level floor-wheels and high-level track-wheels, such that timely get being active.

In a preferred embodiment, left and right sideways spaced apart ones of the slide bodies can be provided underneath the first and/or second head end of the frame, in particular formed by smooth relative narrow longitudinal runners. This makes it possible to position each slide bodies close to its respective left or right spaced apart set of floor- and track-wheels, such that they not get to stand in the way of other functionalities that need to be foreseen underneath the head ends of the frames, like detectors.

In a preferred embodiment each slide body may have its sliding surface positioned in the sideways direction between left and right ones of a pair of high-level track-wheels. This perfectly goes with present situations in most glass houses where the second surface is of the pipe-rail guiding track type with turn-around pipe portions that connect left and right ones of the pairs of pipe-rails with each other and that rest upon a front edge portion of a corridor, whereas the rest of the pipe-rail tracks rest upon support feet such that they are supported spaced above a ground surface of the track paths. The major advantage of this in-between positioning is that the slide bodies then can neatly slide over the turn-around pipe portions that are supported on the floor. During a transition from the corridor onto the pipe-rails, the slide bodies shall be well able to smoothly slide over those turn-around pipe portions and then as soon as they have passed over them, they no longer have to touch or slide over any other part of the track, but instead get to hang free in space above the ground surface between the plant growing paths and in between the pipe-rails. During a transition from the pipe-rails onto the corridor, the slide bodies shall also be well able to smoothly slide over those turn-around pipe portions and then as soon as they have passed over them, they no longer have to touch or slide over any other part of the track, but instead get to hang free in space above the floor surface of the corridor.

Advantageously, the sliding surface is made from friction-reducing and wear-resistant material, in particular plastic, for example HDPE. In the alternative it is also possible to equip the slide bodies with roller bearings or the like.

Further preferred embodiments of the invention are stated in the dependent subclaims. The invention also relates to a use of the inventive horticulture trolley for harvesting of fruits or vegetables, in particular peppers, wherein a main-working/storage platform has one or more containers placed upon it for placing harvested products in the one or more containers by workers.

DETAILED DESCRIPTION OF THE DRAWINGS The invention shall be explained in more detail below with reference to the accompanying drawing in which: - Fig. 1a is a perspective view of an embodiment of the trolley according to the invention with slide bodies mounted underneath its frame; - Fig. 1b and 1c show a front and side view of fig. 1a; - Fig. 2 shows a partial view of a back-end of the trolley frame in fig. 1a during a transition from a corridor onto a pipe-rail track; - Fig. 3 shows the situation in fig. 2 from below with partially cut away front edge portion of the corridor; and - Fig. 4a-b, 5a-b and 6a-b show side and bottom views of subsequent phases during a transition from a corridor onto a pipe-rail track for a variant embodiment of the trolley.

In fig. 1-3 an electrically powered horticulture pipe-rail trolley is shown that has been given the reference numeral 1. The trolley 1 comprises an elongate, substantially rectangular shaped trolley frame 2. The frame 2 is shielded off circumferentially and upwards by plates. Front, centre and back sets of track-wheels 4a, 4b, 4c for driving the trolley 1 over pipe-rail type guiding tracks PR, and front and back sets of swivel floor-wheels 5a-b for driving the trolley 1 over floor type corridors C, are provided underneath the frame 2.

Left and right ones of the pipe-rails PR are connected with each other by a turn-around pipe portion TP. The turn-around pipe portion TP rests freely upon a front edge portion of the corridor C. The pipe-rails PR rest upon support feet (not shown) such that they are supported spaced above a ground surface substantially at the level of the corridor C.

The front/back sets of the track-wheels 4a, 4c are positioned spaced apart in the longitudinal direction over a distance | relative to their corresponding front/back set of floor-wheels 5a, 5b. Since each floor-wheel 5a, 5b is formed by a swivel-wheel it may take in different orientations around its vertical swivel axis. Thus, the distance | may vary between a maximum 11 in which the swivel wheel 5 is pointing away from its corresponding track-wheel 4, and a minimum in which the swivel wheel 5 is pointing towards its corresponding track-wheel 4. In fig. 1c the maximum situation is shown with the distance being I1. The sets of track-wheels 4a, 4c are each formed by a left and right flange wheel that are rotatable around a horizontal rotation axis. Each flange wheel comprises a cylindrical roller part RP and an outer flange part FP. The flange parts FP are positioned spaced at a distance w that is slightly larger than an outer width of the tracks for keeping the trolley 1 centred on a track during driving over such a track and for at a same time protecting back left and right ones of the swivel floor-wheels 5 from rubbing against sidewalls of such a track. The front and back set of track-wheels 4a, 4c are non-driven and merely serve to help carry the trolley 1 when it is driven over a track or corridor. Controllable driving electromotors EM are provided underneath the shielding frame 2 for driving the left and right ones of the centre set of track- wheels 4b in rotation for driving the trolley 1. With this the centre set of track-wheels 4b, comprises distinctive cylindrical roller wheels that are separately rotatable and drivable from distinctive flange wheels. Thus, the trolley is drivable with its roller wheels forward or backwards over the guiding tracks or with its flange wheels over the corridor. The left and right flange wheels of the centre set of track-wheels 4b are separately drivable by their own distinctive electromotor EM such that they can also be controlled to steer the trolley 1 when driving over the corridor. A battery for feeding the electromotors is provided underneath the frame 2.

Left and right ones of the track-wheels 4 are positioned spaced apart in the sideways direction at a certain pitch.

With this, innermost sides of the roller parts RP of the left and right flange wheels lie at a width w1 from each other, whereas outermost sides of the flange parts FP lie at a width w2 from each other.

The left and right ones of the swivel wheels 5, in their forwardly or backwardly projection orientations, lie at greater width, seen in the sideways direction, than the width w2, and thus also sideways outwards from the track-wheels 4. Bottom ends of running surfaces of the swivel wheels 5a, 5b lie at a first height level h1. Bottom ends of running surfaces of the roller parts RP of all three sets of the track-wheels 4a, 4b, 4c lie at a second height level h2, that is higher than h1. The flange parts FP of the front and back sets of track wheels 4a, 4c are dimensioned smaller than the flange wheels of the centre set of track wheels 4b.

Bottom ends of the flange parts FP of the front and back sets of track-wheels 4 lie at a third height level h3, that lies in between h1 and h2. Bottom ends of running surfaces of the flange wheels of the centre set of track-wheels 4b lie at the first height level h1. A scissor-type main-height adjustment mechanism 7 is mounted on top of the frame 2. A rectangular elongate platform 8 is mounted on top of this scissor-type main-height adjustment mechanism 7. The scissor-type main-height adjustment mechanism 7 can be controlled to fold out and collapse again in order to adjust a height of the platform 8 relative to the frame 2. In fig. 1 only the lowermost fully collapsed position is shown.

A front and back upright support 10 are fixedly connected to a front respectively a back end of the platform 8. An elongate two-compartment harvesting container 12 is placed on top of the platform 8. This harvesting container 12 is placed in between the front and back upright supports 10 and is provided with handlebars 12’ for picking it up from the trolley 1, empty it and place it back again.

The frame 2 is dimensioned broader than the scissor-type main-height adjustment mechanism 7 and the platform 8. Two substantially flat top surface portions 2’ extend along either side of the assembly of scissor-type main-height adjustment mechanism 7 and platform 8, such that a worker can stand upon them and walk along the harvesting container 12.

The frame 2 is dimensioned longer than the scissor-type main-height adjustment mechanism 7 and the platform 8. Thus, left and right bumper portions 15 are formed at the front and back end of the trolley frame 2. The bumper portions 15 delimit a recess portion 16 that has a width that is substantially equal to the one of the scissor-type main-height adjustment mechanism 7, the platform 8 and the container 12.

Each upright support 10 forms a vertically operating linear guidance system along which assemblies of standing plateaus 30 and operator panels 27 are movable up and down relative to the assembly of upright supports 10, platform 8 and container 12.

According to the invention, narrow longitudinal runners are provided as slide bodies SB underneath the head ends of the frame 2. Each slide body SB has a replaceable smooth flat sliding surface at its lower side that extends in the longitudinal direction and that is made from low-friction wear-resistant plastic material.

Each of the total of four slide bodies SB extends in the longitudinal direction at a position that lies inward of the innermost side of the roller part RP of its track wheel 4a, 4c. Each slide body SB has a length 12 that is larger than I1.

Each sliding surface comprises a centre portion HCP that extends horizontally at the height level h2, that is to say the same one as the bottom ends of the running surfaces of the front and back sets of track-wheels 4a, 4c. This centre portion HCP extends in the longitudinal direction not only between but also past by its neighbouring swivel- and track-wheels 4, 5. The horizontal centre portion HCP at its outer ends continues into upwardly angled or curved end portions CEP.

Each slide body SB is provided with a throughgoing recess R for rotation axles RA of the front and back sets of track-wheels 4a, 4c to project through.

A transition of the trolley 1 from the corridor C onto the pipe-rails PR with the aid of the slide bodies SB shall now be explained with reference to the variant as shown in fig. 4-6. The main difference there is that the centre set of driven track-wheels with its relative large flange parts has been dispensed with, and that instead the front set of track-wheels 4a are now each of an individual driven type by means of their own dedicated electromotor that is integrated therein.

In fig. 4 the situation is shown in which the front set of track-wheels 4a of the trolley 1 have already been driven onto the pipe-rails PR. The neighbouring front set of swivel wheels 5a that lie immediately behind them hang freely down along the outer sides of the pipe-rails PR. The back set of swivel wheels 5b of the trolley 1 are still supported on the corridor C. The neighbouring back set of track-wheels 4c that lie immediately behind them find themselves freely spaced above the corridor C.

When the trolley 1 then gets driven further forward upon the pipe-rails PR, the leading curved end portions CEP of the slide bodies SB shall reach the turn-around pipe portion TP and gradually start to have its horizontal centre portion HCP slide over it. From then the trolley 1 may simultaneously rest with its back set of swivel wheels 5b on top of the corridor C as well as with its back set of slide bodies SB on top of the turn-around pipe portions TP. However, as soon as the back set of swivel wheels 5b then get to drop off the corridor C, the slide bodies SB then take over entirely. In fig. 5 it can be seen that at moment the track-wheels 4c may still find themselves freely spaced above the corridor C and not yet supported on top of the pipe-rails PR. When the trolley 1 then gets driven further forward upon the pipe-rails PR, the slide bodies SB continue sliding over the turn-around pipe portion TP. At first without any support of either the back set of swivel wheels 5b either the back set of track-wheels 4c. However, as soon as the back set of track-wheels 4c then start rolling over the pipe-rails PR, the slide bodies SB are no longer necessary. In fig. 6 it can be seen that at moment the curved trailing end portions CEP of the slide bodies SB may find themselves freely spaced above the corridor C and the turn-around pipe portion TP and thus no longer supported on top of the pipe-rails track. Thus, a smooth and reliable bump-free transition has been obtained, which in the field is becoming more and more important because of a trend in which the trolleys are becoming increasingly heavier with all kinds of equipment and heavier loaded with harvested products.

A same kind of advantage with the aid of the slide bodies SB gets obtained during a transition of the trolley 1 from the pipe-rails PR onto the corridor C. This time it however shall not be the trailing set of slide bodies SB that bring the advantage, but the leading set of slide bodies SB. When starting in the situation as shown in fig. 8, both sets of track-wheels 4a, 4c of the trolley 1 are supported onto the pipe-rails PR. Both sets of swivel wheels 5a, 5b then hang freely down along the outer sides of the pipe-rails PR.

When the trolley 1 then gets driven backwards upon the corridor C, the leading curved end portions CEP of the back set of slide bodies SB shall reach the turn-around pipe portion TP and gradually start to have its horizontal centre portion HCP slide over it. From then the trolley 1 may simultaneously rest with its back set of track-wheels 4c on top of the pipe-rails PR as well as with its back set of slide bodies SB on top of the turn-around pipe portions TP. However, as soon as the back set of track-wheels 4c then run of the pipe-rails PR, the slide bodies SB then take over entirely.

In fig. 5it can be seen that at moment the swivel wheels 5b may still find themselves hanging freely down along the outer sides of the pipe-rails PR and not yet supported on the corridor C. When the trolley 1 then gets driven further backwards over the pipe-rails PR, the slide bodies SB shall continue to slide over the turn-around pipe portion TP. At first without any support of either the back set of swivel wheels 5b either the back set of track-wheels 4c. However, as soon as the back set of swivel wheels 5b reach the corridor C and start rolling over it, the slide bodies SB are no longer necessary.

In fig. 4 it can be seen that at moment the curved trailing end portions CEP of the slide bodies SB may find themselves freely spaced above the corridor C and the turn-around pipe portion TP and thus no longer supported on top of the pipe-rails track.

Thus, then also a smooth and reliable bump-free transition has been obtained.

Besides the shown and described embodiments, numerous variants are possible. For example, the dimensions and shapes of the various parts can be altered. Also, it is possible to make combinations between advantageous aspects of the shown embodiments. Instead of providing pairs of slide bodies in between the wheels, it is also possible to use a single broader one. Furthermore, itis noted that the set of slide bodies at the front end of the trolley can be dispensed with, because there it shall always be the track-wheels that first get to reach the pipe-rails before the floor-wheels may drop off the floor. However, also at the front end they may advantageous, for example when the trolley gets turned around or when the track path is supported at both ends on corridors and may get driven on and off at both ends. Further it is noted that the track/floor-wheels can also be designed/dimensioned for other heights and/or types of surfaces for the trolley to be driven over. Instead of flange wheels and/or swivel wheels, it is also possible to use other types of track-wheels and floor-wheels. If the guidance track path is of a type that does not have turn-around pipe portions, then the floor/corridor near its front corner portion can also be provided with a special guider/support step that is given a height similar to the height of the tracks above the floor and that is placed at a position in between the tracks.

It should be understood that various changes and modifications to the presently preferred embodiments can be made without departing from the scope of the invention, and therefore will be apparent to those skilled in the art. It is therefore intended that such changes and modifications be covered by the appended claims.

Claims (14)

-13- CONCLUSIES-13- CONCLUSIONS 1. Tuinbouwtrolley (1) voor het rijden over verschillende hoogtes en/of soorten ondergrond, zoals verharde/betonnen vloeren en buisrails, omvattende: + een trolleyframe (2) met een langsrichting met een eerste en tweede uiteinde, en een dwarsrichting loodrecht op de langsrichting met een linker- en rechterzijde; + eerste-einde en tweede-einde paren van laag-niveau vloerwielen (5a, 5b) ingericht en gepositioneerd om de trolley te dragen door over laag-niveau eerste ondergronden te rollen, zoals een verharde/betonnen vloer, met ondereinden van loopvlakken van deze laag-niveau vloerwielen (5a, 5b) die op een eerste hoogteniveau (h1) liggen; en + eerste-einde en tweede-einde paren van hoog-niveau spoorwielen (4a, 4c) ingericht en gepositioneerd om de trolley te dragen door over hoog-niveau tweede ondergronden te rollen, zoals een geleidingsbaan, met ondereinden van loopvlakken van deze hoog-niveau spoorwielen (4a, 4c) die op een tweede hoogteniveau (h2) liggen dat hoger is dan het eerste hoogteniveau (h1), met het kenmerk, dat een of meer eerste-einde en/of tweede-einde glijlichamen (SB) voorzien zijn onder het eerste en/of tweede uiteinde van het frame (2) die zijn ingericht om de trolley te dragen door over een vooraangelegen deel van een hoog-niveau ondergrond te schuiven tijdens overgangen van de trolley van laag-niveau eerste ondergronden naar hoog-niveau tweede ondergronden en vice versa, waarbij elk glijlichaam (SB) een ondergelegen glijvlak heeft dat zich in de langsrichting uitstrekt, welk glijvlak ten minste een middengelegen gedeelte (WKK) heeft dat zich horizontaal uitstrekt op eenzelfde tweede hoogteniveau (h2) als de ondereinden van de loopvlakken van de hoog-niveau spoorwielen (4a, 4c).1. Horticultural trolley (1) for driving over different heights and/or types of surface, such as paved/concrete floors and pipe rails, comprising: + a trolley frame (2) with a longitudinal direction with a first and second end, and a transverse direction perpendicular to the longitudinal direction with a left and right side; + first-end and second-end pairs of low-level floor wheels (5a, 5b) arranged and positioned to carry the trolley by rolling over low-level first surfaces, such as a paved/concrete floor, with bottom ends of treads of these low-level floor wheels (5a, 5b) lying on a first height level (h1); and + first-end and second-end pairs of high-level rail wheels (4a, 4c) arranged and positioned to carry the trolley by rolling over high-level second surfaces, such as a guideway, with lower ends of running surfaces of these high- level rail wheels (4a, 4c) lying on a second height level (h2) which is higher than the first height level (h1), characterized in that one or more first-end and/or second-end sliding bodies (SB) are provided below the first and/or second end of the frame (2) adapted to support the trolley by sliding over a leading part of a high level surface during transitions of the trolley from low level first surfaces to high level second surfaces and vice versa, each sliding body (SB) having a lower sliding surface extending in the longitudinal direction, which sliding surface has at least a central part (CHP) extending horizontally at the same second height level (h2 ) as the lower ends of the running surfaces of the high-level railway wheels (4a, 4c). 2. Tuinbouwtrolley volgens conclusie 1, waarbij het eerste-einde en/of tweede-einde paar van laag-niveau vloerwielen (5a, 5b) op tussenruimte gepositioneerd zijn over een afstand (11) in de langsrichting van hun corresponderende eerste-einde en/of tweede-einde paar hoog-niveau spoorwielen (4a, 4c), waarbij elk glijlichaam (SB) zijn glijvlak zich uitstrekkend heeft in de langsrichting ten minste over de tussenruimte-afstand (11) tussen het paar (de paren) van laag-niveau vloerwielen (5a, 5b) en hoog-niveau spoorwielen (4a, 4c).A horticultural trolley according to claim 1, wherein the first-end and/or second-end pair of low-level floor wheels (5a, 5b) are spaced apart by a distance (11) in the longitudinal direction from their corresponding first-end and/or or second-end pair of high-level rail wheels (4a, 4c), each sliding body (SB) having its sliding surface extending in the longitudinal direction at least over the spacing distance (11) between the pair(s) of low-level floor wheels (5a, 5b) and high level rail wheels (4a, 4c). 3. Tuinbouwtrolley volgens conclusie 2, waarbij elk schuiflichaam (SB) een lengte (12) heeft die groter is dan de tussenruimte-afstand (11}, waarbij zijn glijvlak zich in de langsrichting voorbij de tussenruimte-afstand ( 11) tussen het paar (de paren) laag-niveau vloerwielen (5a, 5b) en hoog-niveau spoorwielen (4a, 4c).A horticultural trolley according to claim 2, wherein each slider body (SB) has a length (12) greater than the spacing distance (11}, its sliding surface extending longitudinally beyond the spacing distance (11) between the pair ( the pairs) of low-level floor wheels (5a, 5b) and high-level rail wheels (4a, 4c). -14 --14- 4. Tuinbouwtrolley volgens een van de voorgaande conclusies, waarbij elk glijvlak verder opwaarts onder een hoek staande of gekromde eindgedeelten (CEP) omvat.A horticultural trolley according to any one of the preceding claims, wherein each sliding surface further comprises upwardly angled or curved end portions (CEP). 5. Tuinbouwtrolley volgens conclusie 3 en 4, waarbij de opwaarts onder een hoek staande of gekromde eindgedeelten (CEP) voorzien zijn op de posities voorbij het (de) op tussenruimte geplaatste paar (paren) laag-niveau vloerwielen {5a, 5b) en hoog-niveau spoorwielen (4a, 4c).A horticultural trolley according to claims 3 and 4, wherein the upwardly angled or curved end portions (CEP) are provided at the positions beyond the spaced pair(s) of low level floor wheels {5a, 5b) and high level rail wheels (4a, 4c). 6. Tuinbouwtrolley volgens een van de voorgaande conclusies, waarbij links en rechts in dwarsrichting gezien op tussenruimte van elkaar geplaatste glijlichamen (SB) voorzien zijn onder het eerste en/of tweede uiteinde van het frame (2), in het bijzonder gevormd door gladde relatief smalle geleiders.6. Horticultural trolley according to one of the preceding claims, in which, seen in transverse direction, on the left and right, slide bodies (SB) placed between each other are provided under the first and/or second end of the frame (2), in particular formed by smooth, relatively narrow conductors. 7. Tuinbouwtrolley volgens een van de voorgaande conclusies, waarbij elk glijlichaam (SB) zijn glijvlak in dwarsrichting gezien tussen het (de) op tussenruimte van elkaar geplaatste paar (paren) laag-niveau vloerwielen (5a, 5b) en hoog-niveau spoorwielen (4a, 4c) gepositioneerd heeft.A horticultural trolley according to any one of the preceding claims, wherein each sliding body (SB) has its sliding surface seen in transverse direction between the pair(s) of low-level floor wheels (5a, 5b) and high-level track wheels (5a, 5b) placed at an interval from each other. 4a, 4c). 8. Tuinbouwtrolley volgens conclusie 7, waarbij elk glijlichaam (SB) een uitsparing (R) omvat waar een rotatie-as (RA) van de hoog-niveau spoorwielen (4a, 4c) doorheen steekt.A horticultural trolley according to claim 7, wherein each sliding body (SB) comprises a recess (R) through which a rotation shaft (RA) of the high-level rail wheels (4a, 4c) projects. 9. Tuinbouwtrolley volgens een van de voorgaande conclusies, waarbij het glijvlak is vervaardigd uit wrijvingverminderend slijtvast materiaal, in het bijzonder kunststof.9. A horticultural trolley according to any one of the preceding claims, wherein the sliding surface is manufactured from friction-reducing wear-resistant material, in particular plastic. 10. Tuinbouwtrolley volgens een van de voorgaande conclusies, waarbij de laag-niveau vloerwielen (5a, 5b) worden gevormd door zwenkwielen.A horticultural trolley according to any one of the preceding claims, wherein the low-level floor wheels (5a, 5b) are formed by swivel wheels. 11. Tuinbouwtrolley volgens een van de voorgaande conclusies, waarbij de hoog-niveau loopwielen (4a, 4c) worden gevormd door flenswielen die elk een cilindrisch roldeel (RP) en een flensdeel (FP) omvatten, waarbij ondereinden van de loopvlakken van de flensdelen (FP) liggen op een derde hoogteniveau (h3) dat ligt tussen het eerste hoogteniveau (h1) van de ondereinden van de loopvlakken van de laag-niveau vloerwielen (5a, 5b) en het tweede hoogteniveau (h2) van de ondereinden van de loopvlakken van de hoog-niveau spoorwielen (4a, 4c).A horticultural trolley according to any one of the preceding claims, wherein the high-level running wheels (4a, 4c) are formed by flanged wheels each comprising a cylindrical roller part (RP) and a flange part (FP), the lower ends of the running surfaces of the flange parts ( FP) lie at a third height level (h3) which is between the first height level (h1) of the lower ends of the treads of the low-level floor wheels (5a, 5b) and the second height level (h2) of the lower ends of the treads of the high-level rail wheels (4a, 4c). 12. Tuinbouwtrolley volgens een van de voorgaande conclusies, waarbij de laag-niveau vloerwielen (5a, 5b) in dwarsrichting gezien op een andere breedte zijn gepositioneerd dan de hoog-niveau spoorwielen (4a, 4c), in het bijzonder op een smallere breedte.A horticultural trolley according to any one of the preceding claims, wherein the low-level floor wheels (5a, 5b), seen in transverse direction, are positioned at a different width than the high-level rail wheels (4a, 4c), in particular at a narrower width. -15--15- 13. Tuinbouwtrolley volgens een van de voorgaande conclusies, waarbij de paren hoog- niveau loopwielen (4a, 4c) dichter bij hun corresponderende uiteinde liggen dan de paren laag-niveau vloerwielen (5a, 5b).A horticultural trolley according to any one of the preceding claims, wherein the pairs of high level running wheels (4a, 4c) are closer to their corresponding end than the pairs of low level floor wheels (5a, 5b). 14. Gebruik van een tuinbouwtrolley (1) volgens een van de voorgaande conclusies voor het oogsten van fruit of groenten, in het bijzonder paprika's, waarbij een hoofd- werk/opslagplatform (8) een of meer containers (12) daarop geplaatst heeft voor het plaatsen van geoogste producten in de een of meer containers (12) door arbeiders.Use of a horticultural trolley (1) according to any of the preceding claims for harvesting fruit or vegetables, in particular peppers, with a main working/storage platform (8) having one or more containers (12) placed thereon for placing of harvested products in the one or more containers (12) by workers.