CN211310699U

CN211310699U - Apparatus for lifting and lowering heavy objects

Info

Publication number: CN211310699U
Application number: CN201921318433.6U
Authority: CN
Inventors: 汉斯·内伦; 马尔滕·博尔曼
Original assignee: Neff Abbey AG
Current assignee: Neff Abbey AG; Nefab AB
Priority date: 2019-07-23
Filing date: 2019-08-14
Publication date: 2020-08-21
Anticipated expiration: 2029-08-14
Also published as: TWM597766U; DE202019104060U1

Abstract

The utility model relates to a device (1) for promoting and reducing heavy object (2), this device is used for promoting and reducing the heavy object between ground and the surface (3) that is located the platform of the level department that is higher than ground, especially server frame or power cabinet. The apparatus (1) comprises a first frame part (5) configured to rest on a lower part of the ground, a second frame part (10) comprising an upper part of the loading surface (11), and means controllable to move the second frame part (10) between a lower position, in which the loading surface (11) is at the level of the ground, and an upper position, in which the loading surface (11) is at a level above the ground. The arrangement comprises at least two rigid struts and at least one power cylinder to interconnect the first frame part (5) and the second frame part (10) and to facilitate relative movement of the first frame part and the second frame part towards and away from each other.

Description

Apparatus for lifting and lowering heavy objects

Technical Field

The utility model relates to an equipment for promoting and reduce heavy object, this equipment is used for promoting and reducing the heavy object between ground and the platform surface that is located the level department that is higher than ground.

The weight of interest has a weight of at least 100 kg. However, the invention relates in particular to a device for lifting and lowering heavy objects in the form of server racks and power cabinets, which fully equipped device may have a weight of up to 1500kg or even more. Hereinafter, the weight is referred to as a server rack, which is a typical example of the weight and does not limit the present invention.

Such equipment is typically used to lift a server rack onto a pallet to enable shipment of the server rack, or to unload the server rack from the pallet to the ground. Typical locations for using such equipment are the server rack manufacturer's and logistics provider's warehouses and facilities.

Background

The server racks are complicated to handle, e.g. to lift onto or lower from the trays, handling by manpower is not possible due to the heavy weight of the server racks, and the free space between the underside of the server racks and the underlying surface is narrow, which means that ordinary fork-lift trucks cannot reach underneath with their forks. Furthermore, the server racks typically have a height of more than 2 meters, which makes handling the server machines more complicated.

Various known solutions to this problem exist. One solution currently in use is to place a ramp beside the tray, on which the server rack can then be pulled or pushed from the ground to the upper surface of the tray, or vice versa, by a push-pull device. However, when rolling a server rack 3 meters high, weighing over 2000kg down a ramp from a tray, for example, this solution is time consuming and involves the risk of injury to the staff on site and damage to the server rack.

Therefore, there is a need for an apparatus that can be used to load and unload server racks or similar weights onto and from a tray to the ground in a quick and safe manner.

An apparatus for lifting and lowering a weight has been known from document US 2008/0012259a1, for lifting and lowering a weight between a ground surface and a surface of a platform located at a level above said ground surface, which apparatus comprises: a lower first frame portion provided with a plurality of wheels configured to rest on the ground so as to allow the apparatus to move with the plurality of wheels, an upper second frame portion comprising a loading surface configured to receive and provide support for the weight during operations to raise or lower the weight between the ground and a surface of the platform, and means interconnecting the first and second frame portions and controllable to cause relative movement of the first and second frame portions towards and away from each other so as to move the second frame portion between a lower position in which the loading surface of the second frame portion is at ground level, in the upper position, the loading surface is at a level above the ground. However, the device described in this document is not suitable for handling such heavy objects as server racks, but rather for transporting file cabinets.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide an apparatus for lifting and lowering a server rack of the type defined hereinbefore, which apparatus is improved at least in some respects with respect to such known apparatus.

According to the present invention, this object is achieved by providing an apparatus characterized by the following means comprising:

at least two rigid struts, each pivotally connected at a first end to the first frame portion and pivotally connected at an opposite second end to the second frame portion so as to be configured to support the second frame portion on the first frame portion and to allow pivotal movement of the second frame portion relative to the first frame portion between said upper and lower positions, an

At least one power cylinder connected at a first end to the first frame part and at an opposite second end to the second frame part so as to extend obliquely relative to a vertical axis along a longitudinal extension of the apparatus, which is perpendicular to said vertical axis when the apparatus is placed on a level ground, the power cylinder being controllable to move the second frame part between said lower and upper positions.

The design of such an apparatus makes it robust enough to handle server racks or other similar heavy objects in a secure manner. One advantage compared to known solutions is that the server rack remains in a stable upright position during the entire operation of lifting or lowering the server rack between the floor and the platform surface.

According to an embodiment of the invention, the second frame part comprises a wall structure which closes the loading surface on its rear side and lateral sides by a vertical rear wall at a rear end of the loading surface and by a vertical first lateral wall and a vertical second lateral wall at opposite first and second lateral ends, respectively, wherein a front opening of the loading surface is defined between a front end of the vertical first lateral wall and a front end of the vertical second lateral wall. The wall structure facilitates safe use of the device by eliminating the risk of the server rack rolling off the loading surface when loaded thereon.

According to another embodiment of the invention, the second frame portion further comprises a closure member movably arranged between the front end of the vertical first lateral wall and the front end of the vertical second lateral wall and configured to be movable between an open position, in which the closure member is removed from the opening between the front ends so as to allow the server rack to be brought to or from the loading surface through the opening, and a closed position, in which the closure member blocks at least a part of the opening between the front ends so as to prevent the server rack from passing through the opening. Such a closing member and wall structure means that the loading surface is closed on all sides during lifting/lowering operations, which improves safety and enables faster handling of the server rack, since it is not necessary to secure the server rack to the loading surface by any separate fastening means, such as straps.

According to another embodiment of the invention, the closing member is plate-shaped, preferably an elongated plate, and is pivotally connected at a first end to a front end of the vertical first lateral wall and at an opposite second end to a front end of the vertical second lateral wall, so as to be pivotally away from the loading surface to an open position, in which the closing member extends substantially in the same plane as the loading surface and acts as a ramp for bringing said weight to or from the loading surface, and towards the loading surface to a closed position, in which the closing member extends substantially perpendicular to said plane, for closing the opening between said front end of the vertical first lateral wall and said front end of the vertical second lateral wall. Such closure members make it simple to load and unload server racks onto and from the trays.

According to another embodiment of the invention, the device further comprises a first locking mechanism for a first wheel of the plurality of wheels, the first locking mechanism comprising a stop member arranged on the body of the first frame part adjacent to said first wheel and a spring member interconnecting said first wheel and the body of the first frame part and configured to apply a biasing force to the first wheel in a direction away from the stop member, wherein the first locking mechanism is shiftable between a release position in which the first wheel is kept at a distance from the stop member by the biasing force of the spring member for allowing the first wheel to move freely and a locking position in which the biasing force of the spring member has been overcome and the stop member is engaged with the first wheel for allowing the first wheel to be fixed, wherein, the first locking mechanism is configured to be in a release position when no load is present on the loading surface and to be transferred to a locking position when a load having a weight sufficient to overcome the biasing force of the spring member is placed on the loading surface. This automatic locking of at least one wheel of the device reduces the risk of accidents by eliminating the possibility of the device moving when it is loaded with a high and heavy server rack, thereby eliminating the risk of the server rack turning over.

According to another embodiment of the invention, the device comprises said first locking mechanism for each of two first rounds of the device. These locking mechanisms allow the device to be fully secured, i.e. the device cannot move along the ground when loaded with heavy weight, which increases the safety factor of the device.

According to another embodiment of the invention, the at least two rigid struts are each arranged to extend obliquely relative to the vertical axis along a longitudinal extension of the apparatus and to extend obliquely in opposite directions from the vertical axis along said longitudinal extension relative to the extension of the at least one power cylinder. This design results in a powerful and efficient device.

According to another embodiment of the invention, the loading surface of the second frame part is square or rectangular, preferably the loading surface has substantially the dimensions of the upper surface of a standard pallet as defined by EUR, ISO or GMA. This size of the loading surface allows the apparatus to be adapted to any load being shipped on the pallet.

According to another embodiment of the invention, the device further comprises a handle arranged at the first frame part, the handle enabling an operator to manually operate the device.

According to another embodiment of the invention, the device comprises at least four, preferably at least six, said rigid struts interconnecting the first frame part and the second frame part, at least two, preferably at least three, rigid struts at each of the two lateral sides of the first frame part and the second frame part.

According to another embodiment of the invention, the device comprises at least two said power cylinders, one at each of the two lateral sides of the first frame part and the second frame part.

According to another embodiment of the invention, the at least one power cylinder is a hydraulic cylinder.

According to another embodiment of the invention, the lifting capacity of the apparatus is at least 1000kg, at least 2000kg, preferably at least 2500 kg.

According to another embodiment of the invention, the plate-shaped closing member has a thickness of 7mm or less, preferably 5mm or less. Such a closing member enables rolling of a server rack with very small wheels onto a loading surface.

The utility model discloses still relate to according to the utility model discloses a usage of equipment. The realisation and advantages of this use appear clearly from the above and the following description of an embodiment of the device according to the invention.

Further advantages as well as advantageous features of the invention will become apparent from the following description of embodiments of the invention.

Drawings

Embodiments of the present invention, which are cited as examples, are described in detail below with reference to the accompanying drawings.

In the drawings:

fig. 1 is a simplified perspective view of an inclination from the rear side of an apparatus according to an embodiment of the invention, showing the apparatus during a first step of an operation of unloading a server rack from a tray to the ground,

fig. 2 is a view corresponding to fig. 1, showing the device during a second step of the operation,

fig. 3 is a view corresponding to fig. 1, showing the device during a third step of the operation,

fig. 4 is a view corresponding to fig. 1, showing the device during a fourth step of the operation,

fig. 5 is a view corresponding to fig. 1, showing the device during a fifth step of the operation,

figure 6 is an oblique perspective view from the front side of the device of figure 1,

fig. 7 is a partial cross-sectional side view of the first frame portion and the second frame portion of the apparatus of fig. 1, with the second frame portion in an upper position,

fig. 8 is a view corresponding to fig. 7, wherein the second frame part is moved towards the lower position,

fig. 9 is a view corresponding to fig. 7, wherein the second frame part is in a lower position,

fig. 10 is an enlarged partial cross-sectional view of the rear steerable wheel of the apparatus of fig. 1, with the second locking mechanism in a released position,

fig. 11 is a view corresponding to fig. 10, wherein the second locking mechanism is in a locked position,

FIG. 12 is an enlarged partial cross-sectional view of the front wheel of the apparatus of FIG. 1 with the first locking mechanism in a released position, an

Fig. 13 is a view corresponding to fig. 12, with the first locking mechanism in a locked position.

Detailed Description

An apparatus 1 according to an embodiment of the invention is shown in fig. 1 to 13 and will be described hereinafter while referring to all these figures.

The apparatus 1 is intended for lifting and lowering heavy objects, in particular server racks 2 hereinafter, between a ground, such as a floor in a warehouse (not shown), and a surface of a platform located at a level above the ground, such as an upper surface 3 of a tray 4 placed on the ground. The server rack 2 is simplified in the drawing as a box, but in practice the server rack has small wheels on the underside, by means of which the server rack rests on and is movable on the underlying surface.

The apparatus 1 comprises a substantially U-shaped lower first frame part 5 provided with wheels in the form of two first wheels (also called front wheels) 6, two rear wheels 7 and two rear steering wheels 8, which are configured to rest on the ground so as to allow the apparatus to move therewith. A handle 9 is arranged at the first frame part and is operatively connected to the steering wheel, which enables an operator to manually move the device over the ground.

The apparatus 1 further comprises an upper second frame portion 10 comprising a loading surface 11 configured to receive and provide support for the server rack 2 during operations to raise or lower the server rack between the floor and the tray surface. The loading surface has dimensions corresponding to the upper surface 3 of a standard pallet 4 defined by EUR, ISO or GMA. The second frame part 10 further comprises a wall structure which closes the loading surface on its rear side and lateral sides by a vertical rear wall 12 at a rear end of the loading surface and by a vertical first lateral wall 13 and a vertical second lateral wall 14 at first and second opposite lateral ends of the loading surface, respectively. A front opening 15 of the loading surface 11 is defined between a front end of the vertical first lateral wall 13 and a front end of the vertical second lateral wall 14.

The device 1 further comprises means interconnecting said first frame part 5 and second frame part 10 and being controllable to cause said first frame part and second frame part to move towards and away from each other, so as to move the second frame part 10 between a lower position (see fig. 4, 5 and 9), in which it is in the first position, the loading surface 11 of the second frame part is located substantially at ground level between the legs of the U-shaped first frame part 5, in the upper position, the loading surface is at a level above the ground, more particularly at the same level as the surface 3 of the tray 4 or the like, onto which surface 3 the server rack 2 is loaded or from which surface 3 the server rack is unloaded by the apparatus.

The device comprises six rigid struts 16 in the form of metal rods, three on each lateral side of the apparatus 1, each pivotally connected at a first end to the first frame part 5 and at an opposite second end to the second frame part 10. The stanchion is configured to support the second frame part on the first frame part and allows a pivoting movement of the second frame part relative to the first frame part between said upper and lower positions about a horizontal axis, which is perpendicular to the longitudinal extension of the device (along which the vertical first and second

lateral walls

13, 14 extend or extend to the right in fig. 7-9) when the device is placed on a level ground.

The device further comprises two power cylinders 17 in the form of hydraulic cylinders, one on each lateral side of the apparatus 1, each power cylinder being pivotally connected at a first end to the first frame part 5 and at an opposite second end to the second frame part 10 so as to extend obliquely relative to the vertical axis along a longitudinal extension of the apparatus, which is perpendicular to said vertical axis when the apparatus is placed on level ground. The power cylinder is controllable by associated control means 18 in the form of a lever on the handle 9 to move the second frame part 10 between said lower and upper positions, more particularly to the upper position by extension and to the lower position by retraction. The power cylinder 17 may be manually driven or motor driven.

Each of the six rigid struts 16 is arranged to extend obliquely with respect to the vertical axis along a longitudinal extension of the apparatus 1 and to extend obliquely in opposite directions along said longitudinal extension from the vertical axis with respect to the extension of the power cylinder 17. More specifically, each strut 16 extends obliquely from the vertical axis along the longitudinal extension of the apparatus towards the rear end of the apparatus (i.e. to the left in fig. 7 to 9), and each power cylinder 17 extends obliquely from the vertical axis along the longitudinal extension of the apparatus towards the front end of the apparatus (i.e. to the right in fig. 7 to 9). This design provides a strong construction for the apparatus, which enables a lifting capacity of 2500kg or more to handle heavy loads in a stable and safe manner.

The second frame part 10 further comprises a closure member 19 in the form of a thin (such as 5mm or less) elongate plate, which closure member 19 is pivotally connected at a first end to the front end of the vertical first lateral wall 13 and at an opposite second end to the front end of the vertical second lateral wall 14. The closure member is pivotally moved away from the loading surface 11 to an open position (see fig. 2, 5-6 and 8-9) in which it is removed from the opening 15 between the front ends to allow the server rack 2 to be brought to or from the loading surface 11 through the opening. The closing member extends substantially in the same plane as the loading surface 11 so as to form an extension of the loading surface in the open position and acts as a ramp for bringing the server racks to or from the loading surface (see fig. 2, 5 and 9). The closing member 19 is further pivotally movable towards the loading surface into a closed position (cf. fig. 1, 3-4 and 7) in which it extends substantially perpendicular to said plane, i.e. vertically, to close the opening 15 between said front end of the vertical first lateral wall 13 and said front end of the vertical second lateral wall 14. The closing means thus serve to prevent the server rack 2 from rolling off the loading surface 11 during lifting or lowering operations by the apparatus. The closure member 19 is provided with securing means 20, which securing means 20 are configured to engage with securing means 21 on the front end portion of the vertical first lateral wall 13 and on the front end portion of the vertical second lateral wall 14 for releasably securing the closure member to said front end portion in its closed position.

The apparatus 1 further comprises a first locking mechanism for each of the two first wheels 6 of the apparatus, which first locking mechanism comprises in each case a stop member 22 arranged on the main body 23 of the first frame part 5 adjacent to the first wheel and a spring member 24 in the form of a compression spring coil interconnecting the first wheel and the main body of the first frame part and configured to exert a biasing force on the first wheel in a direction away from the stop member (downwardly to the left as seen in fig. 12 to 13). Each first locking mechanism is shiftable between a release position (see fig. 12) in which the associated first wheel 6 is held at a distance from the stop member 22 by the biasing force of the spring member 24 so as to allow free movement of the first wheel 6, and a locking position (see fig. 13) in which the biasing force of the spring member has been overcome and the stop member engages with the first wheel so that the first wheel is fixed. Each first locking mechanism is configured to be in a release position when no load is present on the loading surface 11 and to be transferred to a locking position when a load having a weight sufficient to overcome the biasing force of the spring member, such as at least 50kg, is placed on the loading surface. Thus, the first locking mechanism automatically locks the first wheels 6 of the device 1 such that the device 1 is secured when the server rack 2 is rolled onto the loading surface, and the first locking mechanism automatically unlocks the front wheels when the server rack is rolled off the loading surface.

The device 1 further comprises a second locking mechanism for the steering wheel 8, which can be manually controlled by an associated control means 25 in the form of a lever on the handle 9. The second locking mechanism comprises a cogwheel 26 fixedly connected to the steered wheel and locking pins 27, which locking pins 27 are controllable by the associated control device 25 to move between a locking position, in which each locking pin is received between two teeth of said cogwheel to prevent movement of the cogwheel and thereby lock the steered wheel, and a release position, in which the locking pins are located at a distance from the cogwheel to allow free movement of the steered wheel.

Hereinafter, an operation of lowering the server racks 2 from the upper surface 3 of the tray 4 placed on the floor to the floor, that is, an operation of unloading the server racks from the tray will be described.

First, the operator moves the apparatus 1 (see fig. 1) to a position adjacent to the tray 4 with the server racks 2 installed and moves the second frame part 10 to an upper position so that its loading surface 11 is at the same level as the upper surface 3 of the tray by actuating the power cylinder 17 by the associated control means 18 on the handle 9. The operator then locks the steering wheel 8 by means of the control means 25 for the second locking mechanism and releases the securing means 20 of the closing member 19, which closing member 19 then assumes its open position and rests on the front end of the pallet surface 3 (see fig. 2).

The operator then rolls the server rack 2 onto the closing member 19 as a ramp and further onto the loading surface 11 of the device, whereafter the closing member is brought into its closed position in order to close the opening 15 of the loading surface (see fig. 3). The device 1 is now fixed, since the first locking mechanism has been transferred to the locked position by the weight of the server rack, i.e. both first wheels 6 are locked. The empty tray is removed in order to empty the area in front of the apparatus.

The operator then actuates the power cylinder 17 to move the second frame part 10 to the lower position so that the loading surface 11 with the server racks 2 mounted thereon is substantially at ground level (see fig. 4), such as on the ground or a few millimeters above the ground.

Finally, the operator again places the closing member 19 in its open position to rest on the ground, and then rolls the server rack 2 through the closing member onto the ground (see fig. 5). At the moment the server rack rolls off the loading surface 11, the first locking mechanism is automatically transferred to the release position, and after the locking of the diverting wheels 8 is released, the device can be moved again.

Needless to say, the operation of lifting the server racks 2 from the ground onto the upper surface 3 of the tray 4 (i.e. loading the server racks onto the tray) is the same as described above, but in the reverse order (see fig. 5 to 1).

Accordingly, an apparatus is provided for loading and unloading server racks or similar weights onto and from a tray to the ground in a fast and safe manner.

The invention is of course not in any way restricted to the embodiments described above, but many possibilities to modifications thereof would be apparent to a person with ordinary skill in the art without departing from the scope of the invention as defined in the appended claims.

The "pivotally connected" of one element to another means that there is some type of hinge means interconnecting the elements either directly or indirectly.

The terms upper, lower, front, rear, horizontal and vertical, which may be used in this disclosure to define various elements or components, are to be construed as valid for equipment placed on a level ground.

In the present disclosure, a spring member is interpreted as a member that is capable of being compressed from its rest state upon storing potential energy, and is configured to return to the rest state by releasing the stored potential energy.

Although the present disclosure describes a manually operated device, the device according to the present invention may also be fully automatic.

Although the apparatus is described for lifting and lowering a weight between a ground, such as a floor, and a surface of a platform, such as a pallet, located at a level above the ground, it is of course possible to place the apparatus on another surface than the ground/floor, such as on a pallet or another platform, to lift or lower a weight between the surface on which the apparatus rests and a surface at a higher level.

Claims

1. An apparatus (1) for lifting and lowering a weight (2), the apparatus being for lifting and lowering a weight between a ground surface and a surface (3) of a platform located at a level above the ground surface, the apparatus comprising:

a lower first frame part (5) provided with a plurality of wheels configured to rest on the ground so as to allow the apparatus (1) to move therewith,

an upper second frame portion (10) comprising a loading surface (11) configured to receive and provide support for the weight (2) during operations to raise or lower the weight between the ground and the surface (3) of the platform, and

means interconnecting the first frame part (5) and the second frame part (10) and being controllable to cause relative movement of the first frame part and the second frame part towards and away from each other, so as to move the second frame part (10) between a lower position, in which the loading surface (11) of the second frame part is at ground level, and an upper position, in which the loading surface (11) is at a level above the ground,

characterized in that the device comprises:

at least two rigid struts (16), each pivotally connected at a first end to the first frame portion (5) and pivotally connected at an opposite second end to the second frame portion (10), so as to be configured to support the second frame portion (10) on the first frame portion (5) and to allow pivotal movement of the second frame portion (10) relative to the first frame portion (5) between the upper and lower positions, and

at least one power cylinder (17) connected at a first end to the first frame part (5) and at an opposite second end to the second frame part (10) so as to extend obliquely with respect to a vertical axis along a longitudinal extension of the apparatus (1) which is perpendicular to the vertical axis when the apparatus (1) is placed on level ground, the power cylinder (17) being controllable to move the second frame part (10) between the lower position and the upper position.

2. The apparatus (1) according to claim 1, wherein the second frame portion (10) comprises a wall structure closing the loading surface (11) on a rear side and a lateral side thereof by a vertical rear wall (12) at a rear end of the loading surface (11) and by a vertical first lateral wall (13) and a vertical second lateral wall (14) at opposite first and second lateral ends of the loading surface, respectively, wherein a front opening (15) of the loading surface (11) is defined between a front end of the vertical first lateral wall (13) and a front end of the vertical second lateral wall (14).

3. The apparatus (1) according to claim 2, wherein the second frame portion (10) further comprises a closing member (19) movably arranged between a front end of the vertical first lateral wall (13) and a front end of the vertical second lateral wall (14) and configured to be movable between an open position, in which it is removed from the opening (15) between the front ends of the vertical first and second lateral walls, so as to allow the weight (2) to be brought to or away from the loading surface (11) through the opening, and a closed position, in which it blocks at least a portion of the opening (15) between the front ends of the vertical first and second lateral walls, so as to prevent the weight (2) from passing through the opening.

4. Device (1) according to claim 3, characterized in that said closing member (19) is plate-shaped, and which is pivotally connected at a first end to a front end of the vertical first lateral wall (13) and at an opposite second end to a front end of the vertical second lateral wall (14), so as to be pivoted away from the loading surface (11) to the open position and towards the loading surface (11) to the closed position, in the open position, the closing member extends in the same plane as the loading surface (11) and acts as a ramp for bringing the weight (2) to or from the loading surface, in the closed position, the closing member extends perpendicular to the plane to close the opening (15) between the front end of the vertical first lateral wall (13) and the front end of the vertical second lateral wall (14).

5. The device (1) according to any one of claims 1 to 4, characterized in that the device (1) further comprises a first locking mechanism for a first wheel (6) of the plurality of wheels, the first locking mechanism comprising a stop member (22) arranged on the main body (23) of the first frame part (5) adjacent to the first wheel (6) and a spring member (24) interconnecting the first wheel (6) and the main body (23) of the first frame part (5) and configured to exert a biasing force on the first wheel (6) in a direction away from the stop member (22), wherein the first locking mechanism is shiftable between a release position, in which the first wheel (6) is kept at a distance from the stop member (22) by the biasing force of the spring member (24) in order to keep the first wheel (6) in the locked position The first wheel being freely movable, in the locking position the biasing force of the spring member (24) having been overcome and the stop member (22) engaging the first wheel (6) such that the first wheel is fixed, wherein the first locking mechanism is configured to be in the release position when no load is present on the loading surface (11) and to be transferred to the locking position when a load having a weight sufficient to overcome the biasing force of the spring member (24) is placed on the loading surface (11).

6. Device (1) according to claim 5, characterized in that the device (1) comprises the first locking mechanism for each of the two first wheels (6) of the device (1).

7. The apparatus (1) according to any one of claims 1 to 4, characterized in that said at least two rigid struts (16) are each arranged to extend obliquely with respect to a vertical axis along said longitudinal extension of the apparatus (1) and to extend obliquely in opposite directions along said longitudinal extension from said vertical axis with respect to the extension of said at least one power cylinder (17).

8. The apparatus (1) according to any one of claims 1 to 4, characterized in that the loading surface (11) of the second frame part (10) is square or rectangular.

9. The device (1) according to any one of claims 1 to 4, characterized in that the device (1) further comprises a handle (9) arranged at the first frame portion (5), said handle enabling an operator to manually operate the device (1).

10. The apparatus (1) according to claim 1, wherein said weight is a server rack or a power cabinet.

11. Device (1) according to claim 4, characterized in that said closing member (19) is an elongated plate.

12. Apparatus (1) according to claim 8, characterized in that said loading surface (11) has the dimensions of the upper surface (3) of a standard pallet (4) defined by EUR, ISO or GMA.