EP4054968B1 - Device and method for suspending a load under a grate floor - Google Patents

Device and method for suspending a load under a grate floor Download PDF

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Publication number
EP4054968B1
EP4054968B1 EP20804684.7A EP20804684A EP4054968B1 EP 4054968 B1 EP4054968 B1 EP 4054968B1 EP 20804684 A EP20804684 A EP 20804684A EP 4054968 B1 EP4054968 B1 EP 4054968B1
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EP
European Patent Office
Prior art keywords
rod
supporting foot
supporting
grate
suspension line
Prior art date
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Application number
EP20804684.7A
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German (de)
English (en)
French (fr)
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EP4054968C0 (en
EP4054968A1 (en
Inventor
Patrick DRIESMANS
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Mecanot
Original Assignee
Mecanot
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Publication of EP4054968A1 publication Critical patent/EP4054968A1/en
Application granted granted Critical
Publication of EP4054968B1 publication Critical patent/EP4054968B1/en
Publication of EP4054968C0 publication Critical patent/EP4054968C0/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C5/00—Base supporting structures with legs

Definitions

  • the present invention relates to a device and method for suspending a load under a grate floor or any other floor having at least one small opening under which a load is to be suspended.
  • Grate floors are constructed from gratings supporting on supporting beams.
  • For suspending a load under such a grate floor it is customary to use devices that are supported on top of the grate floor and that are provided with a suspension line for connecting to a load under the grate floor.
  • Such a device for suspending a load under a grate floor is for example known from KR 20140004815 U .
  • This device comprises a rod extending in a length direction.
  • the device further comprises two supporting feet that are fixedly connected to the rod at opposing ends of the rod.
  • Each of the supporting feet comprises an upright beam and a horizontal beam, connected in an inverted T shape.
  • the horizontal beam is arranged to be supported directly on the grate floor, and is provided with hooks to be arranged through grate openings in the grate floor for anchoring the supporting foot on the grate floor.
  • the upright beam is connected to the rod at an upper end for supporting the latter.
  • the device further also comprises a suspension line arranged for suspending the load from the device. At a first end, the suspension line is connected to the rod by means of a first connecting element, and at a second end, the suspension line is provided with a second connecting element arranged to be connected to the load to be suspended.
  • one or more gratings of the grate floor need to be removed so as to form an opening in the grate floor that is sufficiently large to allow the suspension line to be arranged through the grate floor.
  • This opening creates a safety hazard, as a person could fall through it and suffer serious injuries. This is especially true in case the grate floor is at a great height.
  • a further disadvantage is that the opened part of the grate floor is no longer available as a passage or escape route.
  • the device also suffers the disadvantage that its center of gravity is high, so that when the load is pulled at a slant, even at a small angle, the device becomes unstable and may tip over.
  • the supporting feet and in particular the horizontal beams of the supporting feet, have a large size for distributing the weight of the device and the load across the grate floor. This brings the disadvantage that the device is large and therefore difficult to handle, and it is not always straightforward to position it in its desired position on the grate floor.
  • the device may be adapted for use with grate floors having gratings of various dimensions.
  • the rod is provided as a telescopic rod. This allows the position of the supporting feet, which are fixedly connected to the rod, to be adjusted by extending or retracting the rod.
  • the adjustment of the device is hard to operate.
  • the use of the two-part telescopic rod also creates a weak point of the device and thus constitutes a safety hazard, especially in case greater distances are to be spanned.
  • the grate floor having to be opened and the considerable size of the supporting feet further bring the disadvantage that the possibilities for positioning the device around the opening in the grate floor are limited.
  • Another device for suspending a load under a grate floor is known from WO 2016/201518 A1 .
  • Other devices for suspending a load, but not under a grate floor are known from US 2008/265124 A1 , US 4 030 705 A and US 3 520 514 A .
  • the present invention aims to provide a device for suspending a load under a grate floor that is compact, simple, and easily adjustable.
  • the present invention provides a device for suspending a load under a grate floor or any other floor having at least one small opening under which a load is to be suspended.
  • the device is arranged to be supported on the grate floor.
  • the device comprises a rod extending along a length direction.
  • the rod preferably has a predetermined length.
  • the rod preferably has a fixed length.
  • the device comprises a first supporting foot and a second supporting foot for allowing the rod to be supported on the grate floor.
  • the first supporting foot and the second supporting foot are arranged for allowing the rod to be supported on the grate floor substantially parallel to the grate floor.
  • the first supporting foot and the second supporting foot are slidably connected to the rod.
  • the first supporting foot and second supporting foot are slidably connected to the rod along the length direction.
  • the first supporting foot and the second supporting foot are slidable on the rod along substantially the entire length of the rod.
  • the first supporting foot and the second supporting foot are slidably connected to the rod transverse to the length direction.
  • the device comprises a suspension line for suspending the load from the device.
  • the suspension line is connected to the rod by means of a connecting element located between the first supporting foot and the second supporting foot.
  • the suspension line is arranged for connecting to the load.
  • the suspension line is provided at the second end with a further connecting element for connecting to the load.
  • the supporting feet being slidably connected to the rod, preferably along the length direction, offers the advantage that the device is easily adjustable for use with grate floors having gratings of various dimensions.
  • At least one of the first supporting foot and the second supporting foot is removably connectable to the rod.
  • both the first supporting foot and the second supporting foot are removably connectable to the rod.
  • the supporting feet being removably connectable to the rod is advantageous when setting up the device.
  • This embodiment further also offers the advantage that the supporting feet and the rod may be stored separately, for example respectively in a trunk and a carrying bag. This is advantageous for storage and transport of the device.
  • the weight of each of the supporting feet is preferably at most 10 kg, more preferably at most 8 kg, even more preferably at most 6 kg, and most preferably at most 5 kg. This allows the total weight of the trunk, the supporting feet, and any accessories to be kept below 25 kg, which is the maximum weight allowed to be lifted by workers according to current standards. Preferably, this total weight is at most 20 kg, and more preferably at most 15 kg.
  • the weight of the rod is preferably at most 20 kg, more preferably at most 18 kg, and even more preferably at most 16 kg. This allows the total weight of the trunk, the supporting feet, and any accessories to be kept below 25 kg, which is the maximum weight allowed to be lifted by workers according to current standards. Preferably, this total weight is at most 20 kg, and more preferably at most 17 kg.
  • At least one of the first supporting foot and the second supporting foot comprises a lower supporting foot portion and an upper supporting foot portion.
  • both the first supporting foot and the second supporting foot comprise a lower supporting foot portion and an upper supporting foot portion.
  • the lower supporting foot portion and the upper supporting foot portion are movable with respect to one another between an open position, in which the rod is insertable into the at least one supporting foot, and a closed position, in which the lower supporting foot portion and the upper supporting foot portion surround the rod and the at least one supporting foot is slidable along the length direction on the rod.
  • This embodiment offers the advantage that the rod is easily connectable in a removable way to the supporting foot by moving the supporting foot portions of the supporting foot to the open position, inserting the rod into the supporting foot, and moving the supporting foot portions to the closed position.
  • the lower supporting foot portion and the upper supporting foot portion are tiltably connected to each other so that the lower supporting foot portion and the upper supporting foot portion are tiltable relative to each other between the open position and the closed position.
  • the supporting foot portions being tiltably connected to each other offers the advantage that the supporting feet are connectable to each other by means of a simple operation, i.e. tilting the supporting foot portions between the open position and the closed position. This simplifies the use of the device according to an embodiment of the present invention.
  • the lower supporting foot portion is provided with a first slot for at least partially receiving the rod.
  • the upper supporting foot portion is provided with a second slot for at least partially receiving the rod.
  • the first slot and the second slot extend along the length direction.
  • a bottom of the first slot and a bottom of the second slot are similar in shape to the rod.
  • the slots in the supporting foot portions are advantageous to allow sliding the supporting foot and the rod relative to each other along the length direction in a simple manner.
  • the slots are also advantageous to prevent unwanted sliding of the rod and the supporting foot relative to each other transverse to the length direction. This is advantageous for the stability and the safety of the device
  • the first slot in the lower supporting foot portion then allows the rod and the supporting foot to be fixed relative to each other, transverse to the length direction, already in the open position of the supporting foot when setting up the device.
  • the second slot in the upper supporting foot portion then ensures further fixing of the rod and the supporting foot relative to each other, transverse to the length direction, in the closed position of the supporting foot.
  • the first slot has a greater depth than the second slot.
  • the first slot having the greater depth offers the advantage that already in the open position of the supporting foot, the rod is firmly fixable transverse to the length direction.
  • the second slot can then be made less deep to further fix the rod, in the closed position of the supporting foot, at the top of the rod transverse to the length direction.
  • the second slot being less deep then allows the supporting foot as a whole to be kept compact.
  • the first slot is arranged to fully receive the rod.
  • the second slot is arranged to partially receive the rod.
  • the side walls of the first slot reach higher than the rod, which obstructs the rod exiting the first slot, and is thus advantageous for fixing, transverse to the length direction, the rod and the supporting foot relative to each other already in the open position of the supporting foot.
  • the second slot can then be made less deep to further fix the rod, in the closed position of the supporting foot, at the top of the rod transverse to the length direction. The second slot being less deep then allows the supporting foot as a whole to be kept compact.
  • the first slot is provided with at least one insert made from a first elastic material, for example from rubber.
  • the at least one insert made from the first elastic material is advantageous to ensure a good joining of the rod to the first slot, and thus the lower supporting foot portion, so as to distribute the load of the rod onto the first slot and the lower supporting foot portion evenly when using the device.
  • the at least one insert made from the first elastic material is advantageous for protecting the rod and the supporting foot against damages.
  • the at least one insert is releasably connected to the first slot. This offers the advantage that the at least one insert can easily be replaced in the event of wear.
  • the at least one supporting foot is provided with a locking system for releasably locking together the lower supporting foot portion and the upper supporting foot portion in the closed position.
  • the releasably interlockable supporting foot portions offer the advantage that the supporting foot portions can be fixed together in the closed position of the supporting foot to prevent the rod, when connected to the supporting foot, from coming loose. This is advantageous for the safety of the device.
  • At least one of the first supporting foot and the second supporting foot is provided with a supporting surface by means of which the at least one supporting foot is arranged to be supported on the grate floor.
  • both the first supporting foot and the second supporting foot are provided with a supporting surface by means of which the supporting foot is arranged to be supported on the grate floor.
  • the supporting surface is rotatably connected to the at least one supporting foot.
  • the supporting surface is rotatable around the height direction substantially perpendicular to the grate floor. This embodiment is advantageous for positioning the supporting surface and the at least one supporting foot separately from each other at a desired position, respectively for being supported on the grate floor and for supporting the rod.
  • the supporting surface is provided with a locking pin of a predetermined height, arranged to be inserted into a grate opening of the grate floor.
  • the supporting surface is provided with a single locking pin of a predetermined height, arranged to be inserted into a grate opening of the grate floor.
  • the locking pin offers the advantage that the supporting foot can be secured in the desired position on the supporting floor in a quick and easy manner, by inserting the locking pin in a grate opening of a grating of the grate floor.
  • the predetermined height of the locking pin is smaller than the height of the grate floor.
  • the predetermined height of the locking pin is smaller than the height of a grating of the grate floor.
  • the locking pin having a smaller height than the height of the grate floor offers the advantage that the locking pin can also be used for anchoring the supporting foot on the grate floor when the supporting foot is positioned over a supporting beam of the grate floor.
  • the locking pin is positioned non-centrally on the supporting surface along the length direction.
  • This embodiment is advantageous when the device is used with grate floors where two gratings are arranged abutting each other on a supporting beam.
  • a locking pin positioned centrally along the length direction of a supporting foot positioned neatly over the supporting beam between the two gratings, would end up being located on the edges of the gratings, or in a cut-off grate opening at the edge of one of the gratings, as a result of which the supporting foot cannot be properly secured to the grate floor.
  • the locking pin being non-centrally positioned along the length direction then offers the advantage that the supporting foot can be positioned neatly over the supporting beam on the grate floor for a proper support, as well as being properly secured to the grate floor by positioning the locking pin into grate openings located at some distance from the edges of the gratings.
  • the locking pin is positioned in the direction transverse to the length direction on the supporting surface in such a way that the locking pin is located centrally below the rod in the direction transverse to the length direction. If the rod is aligned along the length direction with a series of grate openings in the grate floor, this allows the connecting element to always be positioned directly over one of the grate openings in this series, and to have the suspension line suspended straight downwards from there through this grate opening.
  • the supporting surface is at least partially provided with a coating made from a second elastic material, for example from rubber.
  • the coating made from the second elastic material is advantageous for increasing friction between the supporting surface and the grate floor, and thus limiting unwanted sliding of the supporting foot on the grate floor.
  • the coating made from the second elastic material is also advantageous for allowing the supporting foot to tilt along with the rod in case the rod bends due to the load being suspended from the device.
  • the coating made from the second elastic material is also advantageous for protecting the supporting foot against damage.
  • the coating made from the second elastic material is releasably connected to the supporting surface. This offers the advantage that the coating made from the second elastic material can easily be replaced in the event of wear.
  • At least one of the first supporting foot and the second supporting foot is provided with a handle for carrying the at least one supporting foot.
  • both the first supporting foot and the second supporting foot are provided with a handle for carrying the supporting foot.
  • the supporting foot being provided with a handle offers the advantage that it is easily portable by a user, and thus improves the comfort of the user.
  • the rod is provided with a stop for the supporting feet at least at one end located along the length direction.
  • the rod is provided with a stop for the supporting feet at both ends positioned along the length direction.
  • the stop at the end of the rod offers the advantage that the supporting feet cannot be slid beyond the ends of the rod, which is advantageous for the safety of the device.
  • the stop is a flange.
  • a stop can be provided to an end of the rod in a simple manner.
  • At least one of the lower supporting foot portion, the upper supporting foot portion and the stop is shaped and/or dimensioned such that the at least one supporting foot cannot be moved into the closed position when the stop is located between the lower supporting foot portion and the upper supporting foot portion.
  • This embodiment offers the advantage that the rod cannot be arranged incorrectly in the at least one supporting foot with the stop located between the lower supporting foot portion and the upper supporting foot portion, in which position the rod is not well supported. This is beneficial for the safety of the device.
  • the rod is a hollow cylindrical tube.
  • the use of a hollow cylindrical tube as the rod offers the advantage of lowering the weight of the rod, while retaining sufficient strength for the rod to be able to carry larger loads. This provides a sturdy, yet portable device.
  • the device is arranged for positioning the rod at a predetermined first distance above the grate floor while the device is in use.
  • the first supporting foot and the second supporting foot are arranged for positioning the rod at the predetermined first distance above the grate floor while the device is in use.
  • the rod is positioned as low as possible near the grate floor so that one can easily step over it and the passage on the grate floor on which the device is set up is minimally obstructed. Placing the rod in a low position also lowers the center of gravity of the device, and is thus also advantageous for increasing the stability of the device.
  • the total height of the device is at most 30 cm, more preferably at most 25 cm, and even more preferably at most 20 cm.
  • the suspension line is surrounded by a protective sheath which, while the device is in use, extends over a predetermined range along the suspension line at the level of the predetermined first distance.
  • the protective sheath surrounds the suspension line along the entire length of the suspension line.
  • the protective sheath also surrounds the connecting element at the first end of the suspension line.
  • the protective sheath is advantageous for protecting the part of the suspension line that, while the device is in use, extends through a grate opening of the grate floor, against damages that may for example occur as a result of contact between the suspension line and the walls of the grate opening. Such damages may result in the suspension line breaking, causing the suspended load to fall.
  • This embodiment is therefore advantageous for the safety of the device.
  • the connecting element is slidably connected to the rod along the length direction.
  • the connecting element being slidable on the rod along the length direction offers the advantage that the suspension line can easily be positioned over a position under the grate floor where the load is to be suspended.
  • the connecting element is removably connectable to the rod.
  • the connecting element of the suspension line being removably connectable to the rod is advantageous when setting up the device.
  • This embodiment further also offers the advantage that the suspension line can be detached from the rod and stored separately from the rod, for example in a trunk. This is advantageous for storage and transport of the device.
  • This embodiment also offers the advantage that suspension lines having different lengths can be provided for suspending the load at different heights under the grate floor.
  • the connecting element is foldable to predetermined dimensions so that the connecting element is installable through a grate opening of the grate floor.
  • the connecting element is foldable so that the connecting element is installable through a grate opening of the grate floor of at least 30x30 mm.
  • the connecting element is slidably connected to the rod along the length direction.
  • the connecting element is removably connectable to the rod.
  • the foldable connecting element allows the connecting element to be easily inserted or pulled through a grate opening in the grate floor for extending the suspension line through the grate floor without having to remove any gratings from the grate floor.
  • this is beneficial for the safe use of the device.
  • the connecting element is foldable in such a way that the connecting element when being inserted through the grate opening does not press against the walls of the grate opening, and the risk of damage to the connecting element is thus limited.
  • the connecting element comprises a loop arranged around the rod.
  • the connecting element is a loop arranged around the rod.
  • a connecting element is provided in a simple manner that is foldable or compressible for fitting through a grate opening in the grate floor so as to be able to install the connecting element through the grate floor without having to remove any gratings.
  • the connecting element is made from a flexible material.
  • the loop is made from a flexible material.
  • the suspension line is made from a flexible material.
  • connection element offers the advantage of a further good foldability of the connecting element so as to allow it to be easily inserted or pulled through a grate opening in the grate floor. This can be done without pressing against the walls of the grate opening, which would result in possible damage.
  • the flexible material has a breaking strength that is greater than the breaking strength of steel.
  • the flexible material is polyethylene (PE).
  • PE polyethylene
  • UHMWPE Ultra High Molecular Weight PolyEthylene
  • the connecting element is dimensioned so that while the device is in use, the first end of the suspension line is positioned at a predetermined second distance below the rod.
  • the loop is dimensioned so that while the device is in use, the first end of the suspension line is located at the predetermined second distance below the rod. The second distance is smaller than the first distance.
  • This embodiment offers the advantage that while the device is in use, the connecting element has already transitioned into the suspension line at a position above the grate floor, and there can thus be no contact between the connecting element, for example the open loop, and walls of a grate opening in the grate floor through which the suspension line extends. This could damage the connecting element, possibly resulting in the latter breaking and the suspended load falling.
  • This embodiment is thus advantageous for the safety of the device.
  • the stop and the connecting element have predetermined dimensions so that the connecting element is slidable over the stop.
  • the stop and the loop have predetermined dimensions so that the loop is slidable around the stop.
  • This embodiment offers the advantage that the connecting element is removably connectable to the rod in a simple manner by sliding the connecting element over the stop.
  • the rod is provided with at least one attachment made from a third material that is arranged to be placed between the rod on the one hand, and the first supporting foot, the second supporting foot or the connecting element on the other hand.
  • the rod is provided with three attachments made from the third material, wherein a first attachment is arranged to be placed between the rod and the first supporting foot, wherein a second attachment is arranged to be placed between the rod and the second supporting foot, and wherein a third attachment is arranged to be placed between the rod and the connecting element.
  • the at least one attachment is slidably connected to the rod along the length direction.
  • the third material is an elastic material, for example rubber.
  • both the first supporting foot and the second supporting foot can be provided with an attachment made from the third material that is arranged to be placed between the rod on the one hand, and the first supporting foot and the second supporting foot on the other hand.
  • the at least one attachment made from the third material is advantageous to ensure a good joining of the rod to the first supporting foot, the second supporting foot or the connecting element, so as to evenly distribute the load of the rod onto the first supporting foot or the second supporting foot, or the load of the connecting element onto the rod, when using the device.
  • the at least one attachment made from the third material is advantageous for protecting the rod and the first supporting foot, the second supporting foot or the connecting element against damages.
  • the at least one attachment is releasably connected to the rod. This offers the advantage that the at least one attachment can easily be replaced in the event of wear.
  • the at least one attachment is releasably securable to the rod.
  • the at least one attachment is arranged to be placed between the rod on the one hand, and the connecting element on the other hand, the at least one attachment is provided with a recess or groove into which the connecting element is at least partially insertable.
  • the recess of the at least one attachment into which the connecting element is insertable offers the advantage that unwanted sliding of the connecting element relative to the at least one attachment can be prevented while the device is in use. Thus, the safety of the device is increased.
  • the present invention also provides a grate floor under which a load is suspended at a predetermined position by means of the device according to the present invention.
  • the grate floor comprises at least one grating which is supported at least by a first supporting beam and a second supporting beam.
  • the device is positioned on the at least one grating so that the first supporting foot and the second supporting foot are supported on the at least one grating over the first supporting beam and the second supporting beam, respectively.
  • the device is positioned on the at least one grating so that the rod, connected to the first supporting foot and the second supporting foot, extends over the predetermined position for suspending the load.
  • the suspension line extends through a grate opening of the at least one grating over the predetermined position for suspending the load so that the first end and the second end of the suspension line are positioned over and under the at least one grating, respectively.
  • the connecting element at the first end of the suspension line is connected to the rod between the first supporting foot and the second supporting foot.
  • the suspension line is at the second end connected to the load.
  • the present invention also provides a method for suspending a load at a predetermined position under a grate floor by means of the device according to the present invention.
  • the grate floor comprises at least one grating which is supported at least by a first supporting beam and a second supporting beam.
  • the method comprises the step of positioning the device on the at least one grating. The positioning is carried out so that the first supporting foot and the second supporting foot are supported on the at least one grating over the first supporting beam and the second supporting beam, respectively. The positioning is carried out so that the rod, when connected to the first supporting foot and the second supporting foot, extends over the predetermined position for suspending the load. If necessary, the method comprises the step of connecting the rod to the first supporting foot and the second supporting foot.
  • the method comprises the step of connecting the connecting element to the rod.
  • the method comprises the step of mounting the suspension line through a grate opening of the at least one grating over the predetermined position for suspending the load so that the first end and the second end of the suspension line are positioned over and under the at least one grating, respectively.
  • the method comprises the step of connecting the load to the suspension line via the second end of the suspension line.
  • Figure 1 and 2 show, in a perspective view and a side view, respectively, a device 100 according to an embodiment of the present invention for suspending a load 200 under a grate floor 300.
  • Figure 3 shows a side view of a part of the device 100, namely, a supporting foot 120.
  • a method for suspending a load 200 under a grate floor 300 is shown in the Figures 4-16 .
  • a further part of the device is shown, namely, a suspension line 130.
  • the device 100 comprises a rod 110 extending along a length direction L.
  • the rod 110 is preferably a hollow cylindrical tube 110, providing a strong rod 110 with sufficient bearing capacity, of which the weight, however, can be kept low, which is advantageous for the portability of the device 110.
  • other types of rod may also be used, such as for example a solid cylindrical rod or a solid or hollow beam.
  • the device 100 further comprises two supporting feet 120 that are arranged to be supported directly on gratings 310 of the grate floor 300.
  • the supporting feet 120 are further arranged for supporting the rod 110, while the device 100 is in use, substantially parallel to the grate floor 300 at a predetermined first distance A1 above the grate floor 300.
  • the first distance A1 is as small as possible so that the rod 110 is positioned close to the grate floor 300. This ensures that the center of gravity of the device 100 is kept as low as possible near the grate floor 300, which is advantageous for the stability of the device 100, and thus also for the safety while using the device 100.
  • the low positioning of the rod 110 is further advantageous for keeping the passage on the grate floor 300 free, as it is easy to simply step over the rod 110.
  • two identical supporting feet 120 are used, but it should be understood that in other embodiments of the device according to the present invention, different types of supporting feet for supporting the rod 110 may also be used.
  • the supporting feet 120 are connectable to the rod 110 in such a way that the supporting feet 120 are slidable along the rod 110 along the length direction L. This also allows the rod 110 to be slidable through the supporting feet 120 when the rod 110 is connected to the supporting feet 120.
  • the slidable supporting feet 120 allow the device 100 to be easily adapted for supporting the device 100 at the desired positions on the grate floor 300.
  • the supporting feet 120 are preferably supported on the gratings 310 of the grate floor 300 in positions where the gratings 310 are supported on the supporting beams 320, 330 of the grate floor 300, as for example shown in Figure 6a and 12 .
  • the positioning over the supporting beams 320, 330 offers the advantage of a sturdy support of the device 100.
  • Each supporting foot 120 comprises a lower supporting foot portion 124 and an upper supporting foot portion 125 that are tiltably connected to each other by means of a hinge 129.
  • the lower supporting foot portion 124 is arranged for being supported directly on the grate floor 300 with a supporting surface 121 and for supporting 110 the rod 110 while using the device 100.
  • the lower supporting foot portion 124 and the upper supporting foot portion 125 can be tilted relative to each other from an open position, as for example shown in the Figures 7-9 , in which the rod is insertable into the supporting foot 120, supporting on the lower supporting foot portion 124, and a closed position, as for example shown in the Figures 1 , 13 and 14 , in which the lower supporting foot portion 124 and the upper supporting foot portion 125 fully surround the rod 110 for retaining the rod 110 in the supporting foot 120.
  • the upper supporting foot portion 125 is thus mainly arranged in combination with the lower supporting foot portion 124, to retain the rod 110 in the supporting foot 120.
  • the rod 110 may be provided with a first attachment (not shown) and a second attachment (not shown), preferably made from rubber or another suitable elastic material, that are slidable along the length direction L on the rod 110, and that are arranged to be placed between the rod 110 on the one hand, and the first supporting foot 120 and the second supporting foot 120, respectively, on the other hand. This is to make the rod 110, the first supporting foot 120 and the second supporting foot 120 join together well and to protect them against damages.
  • the lower supporting foot portion 124 and the upper supporting foot portion 125 are provided with a first slot 126 and a second slot 127, respectively.
  • the first slot 126 and the second slot 127 are each arranged for receiving the rod 110, and extend along the length direction L to allow the rod 110 and the supporting feet 120 to slide relative to each other along the length direction L.
  • the first slot 126 and the second slot 127 together are arranged to completely surround the rod 110 in the closed position of the supporting foot 120 for retaining the rod 110 in the supporting foot 120.
  • the depth D1 of the first slot 126 is greater than the diameter D of the rod 110, so that the rod 110 can be fully received in the first slot 126.
  • the high upright walls of the first slot 126 thus prevent the rod 110 from sliding transverse to the length direction L when the rod 110 is arranged in the first slot 126, even in the open position of the supporting foot 120.
  • the depth D2 of the second slot 127 is smaller than the diameter D of the rod 110, so that the upper supporting foot portion 125, and thus also the supporting foot 120, can be kept compact for a good manageability of the supporting foot 120.
  • the second slot 127 can be made smaller than the first slot 126, since the second slot 127 mainly provides further fixing of the rod 110 at the top in the supporting foot 120 in the closed position of the supporting foot 120.
  • the bottom of the first slot 126 and the second slot 127 are similar in shape to the outline of the rod 110 for providing a good support of the rod 110 and a smooth sliding of the rod 110 and the supporting feet 120 relative to each other along the length direction L.
  • Each supporting foot 120 is further provided with a locking system 128 for releasably locking together the lower supporting foot portion 124 and the upper supporting foot portion 125 in the closed position, so that unwanted opening of the supporting foot 120 while the device 100 is in use can be prevented.
  • the locking system 128 comprises a locking pin 1281 on the lower supporting foot portion 124 that is insertable into a locking opening 1282 in the lower supporting foot portion 125 provided to that end, for locking together the lower supporting foot portion 124 and the upper supporting foot portion 125, and can be removed from it again for unlocking.
  • the rod 110 is provided at both ends 111, 112 with a flange 113 that serves as a stop 113 for preventing the supporting feet 120 from sliding from the rod 110 while using the device 100.
  • the supporting foot 120 is provided with a locking pin 122 on the supporting surface 121, as can for example be seen in Figure 1 and 2 .
  • the locking pin 122 is arranged to be placed in a grate opening 311 of the grate floor 300, and thus to prevent the supporting foot 120 from sliding on the grate floor 300. It then remains possible to rotate the supporting foot 120 around the locking pin 122, but it is further secured by connecting the rod 110 to both supporting feet 120 of the device 100.
  • the locking pin 122 has a predetermined height H2 that is smaller than the height H1 of the grate floor 300. This allows the supporting foot 120, as for example shown in Figure 6b , to be positioned over a supporting beam 320, 330 of the grate floor 300 for optimal support, yet without the locking pin 122 contacting the supporting beam 320, 330.
  • the locking pin 122 is positioned non-centrally on the supporting surface 121 along the length direction L, as can for example be seen in Figure 2 . This allows the supporting foot 120 to be positioned neatly over a supporting beam 320, 330 of the grate floor 300 where two gratings 310 of the grate floor 300 abut each other, and the locking pin 122 to still be arranged in one of the grate openings 311 of the grate floor 300.
  • the locking pin 122 With a central positioning of the locking pin 122 along the length direction L, the locking pin 122 would end up over or between the edges of the abutting gratings 310, and the supporting foot 120 would therefore need to be slightly shifted for the locking pin 122 to still be able to be arranged in one of the grate openings 311 of the abutting gratings 310, with the result, however, that the supporting foot 120 is less well supported.
  • the locking pin 122 In the direction transverse to the length direction L, the locking pin 122 is positioned on the supporting surface 121 in such a way that the locking pin 122 is located centrally below the first slot 126, and thus the rod 110, in the direction transverse to the length direction L. This allows the rod 110 to be aligned along the length direction L with a series of grate openings 311 in the grate floor 300.
  • the lower supporting foot portion 124 is made from a folded plate, preferably a folded metal plate. In an alternative embodiment, such a lower supporting foot portion 124 may also be made in another suitable manner known to the person skilled in the art, for example by welding together the plate parts 1241, 1242, 1243, 1244.
  • a horizontal plate part 1244 provides the supporting surface 121 of the supporting foot 120.
  • a first upright plate part 1241 and a second upright plate part 1242, located at opposite sides of the horizontal plate part 1244, are each provided at the top with a groove 126 forming part of the first slot 126.
  • an insert made from rubber or another suitable elastic material can be inserted in each of these grooves 126 in order to make the rod 110 properly connect to the first slot 126, for protecting the rod 110 and the first slot 126 against damages, and to prevent the rod 110 from sliding in the first slot 126 in case of oblique loads in the length direction of the rod 110.
  • the first upright plate part 1241 and the second upright plate part 1242 are preferably connected to each other by means of one or more connecting rods 1245 for extra strengthening of the supporting foot 120.
  • the connecting rod 1245 located at the underside of the first slot 123 also ensures that when the rod 110 is positioned in the open position of the supporting foot 120 with one of the flanges 113 in the supporting foot 120, the supporting foot 120 can no longer be moved to the closed position. This prevents an incorrect and dangerous use of the supporting foot 120 where the rod 110 would be supported on only one of the first upright plate part 1241 and the second upright plate part 1242.
  • a third upright plate part 1243 which is located at a free side of the horizontal plate part 1244 between the opposite sides of the horizontal plate part 1244 where the first upright plate part 1241 and the second upright plate part 1242 are located, is provided with an opening so that the third upright plate part 1243 can be used as a handle 123 for carrying the supporting foot 120.
  • the supporting foot 120 can be provided without the handle 123, and thus without the third upright plate part 1243, or that the handle 123, if so desired, can be provided in another way on the supporting foot 120.
  • a fourth upright plate part (not shown) may also be provided at a free side of the horizontal plate part 1244 opposite the side of the horizontal plate part 1244 where the third upright plate part 1243 is located. For increased strength, this fourth upright plate part is then preferably connected to the first upright plate part 1241 and the second upright plate part 1242. Such a reinforcement may, if so desired, also be provided by means of the third upright plate part 1243.
  • the lower supporting foot portion 124 may also be provided in other ways.
  • a horizontal plate part 1244 can be used onto which an upright tube or sleeve is secured.
  • the tube may have a circular cross-section or a cross-section in the shape of a polygon, such as for example a square.
  • the first slot 126 is then formed by two grooves 126 in opposing walls of the upright tube at the top of the upright tube.
  • the lower supporting foot portion 124 can be made up of a horizontal plate part 1244 onto which a central upright plate part is secured.
  • the first slot 126 is then formed by a groove 126 in the top of the central upright plate part. Due to the central positioning of the central upright plate part, this embodiment offers the advantage of a central loading of the supporting foot 120, lowering the risk of the supporting foot 120 tilting, for example upon bending of the rod 110 under the influence of the suspended load 200.
  • upright support parts may be provided on the horizontal plate part that are arranged transverse to and against the central upright plate part.
  • the central upright plate part may also be used in combination with the embodiments of the lower supporting foot portion 124 mentioned above.
  • the central plate part can then be positioned centrally between the first and second upright plate parts 1241, 1242 or centrally between the walls of the upright tube or sleeve in which the grooves 126 of the first slot 126 are arranged.
  • the grooves 126 in the first and second upright plate parts 1241, 1242 or the grooves 126 in the opposing walls of the upright tube or sleeve may be made slightly larger than the groove 126 in the central upright plate part, so that the rod is mainly supported on the central plate part.
  • the grooves 126 in the first and second upright plate parts 1241, 1242 or the grooves 126 in the opposing walls of the upright tube or sleeve can then be used for aligning the supporting foot 120 and the rod 110 relative to each other.
  • the upper supporting foot portion 124 is also made from a folded plate, preferably a folded metal plate. In an alternative embodiment, such an upper supporting foot portion 125 may also be manufactured in any other suitable way known to the person skilled in the art, for example by welding together the plate parts 1251, 1252, 1254.
  • a horizontal plate part 1254 forms the top of the supporting foot 120.
  • a first upright plate part 1251 and a second upright plate part 1252, located at opposite sides of the horizontal plate part 1254, each at the top provide a part of the second slot 127.
  • Such a construction of the lower supporting foot portion 124 and the upper supporting foot portion 125 allows a sturdy supporting foot 120 to be provided having a relatively low weight for a good portability of the supporting foot 120.
  • the upper supporting foot portion 125 may also are arranged as a single bracket in which the second slot 127 is arranged. Such an embodiment is advantageous for lowering the weight of the supporting foot 120.
  • the device 100 further comprises a suspension line 130, as shown in the Figures 10-16 , which is arranged for suspending a load 200 from the device 100.
  • the suspension line 130 is preferably a rope braided from polyethylene (PE) fibers, and more preferably from Ultra High Molecular Weight PolyEthylene (UHMWPE) fibers, but it can also be made from other suitable materials for carrying a load 200, such as for example steel.
  • the suspension line 130 is provided at a first end 131 with a connecting element 133 for connecting the suspension line 130 to the rod 110.
  • the connecting element 133 is provided as a loop 133 at the first end 131 of the suspension line 130.
  • the loop 133 is arranged to be connected to the rod 110 between the supporting feet 120.
  • the loop 133 is freely slidable along the length direction L on the rod 110 between the two supporting feet 120. This allows the suspension line 130 to be precisely positioned on the rod 110 in the desired position along the length direction L between the supporting feet 120 when the rod 110 is supported by the supporting feet 120 on a grate floor 300.
  • the rod 110 may be provided with a third attachment (not shown), preferably made from rubber or another suitable elastic material, which is slidable on the rod 110 along the length direction L, and which is arranged to be placed between the rod 110 and the loop 133. This is to make the rod 110 and the loop 133 join together well and to protect them against damages, and to prevent sliding of the loop 133 in case of an oblique load in the length direction L.
  • the dimensions of the loop 133 and the flanges 113 at the ends 111, 121 of the rod 110 are matched to each other in such a way that the loop 133 can be slid over the flanges 113 to allow the loop 133 to be releasably connected to the rod 110, as shown in Figure 11 .
  • the dimensions of the loop 133 are selected in such a way that, when the loop 133 is placed around the rod 110, supported by the supporting feet 120 at the first distance A1 from the grate floor 300, the first end 131 of the suspension line is at a predetermined second distance A2 below the rod 110, as for example shown in Figure 12 and 13 .
  • the second distance A2 is smaller than the first distance A1, so that the loop 133 is located entirely above the grate floor 300 and cannot come into unwanted contact with the grate floor 300, which would result in possible damage and breaking of the loop 133.
  • the loop 133 is made from a flexible material that allows the loop 133 to be folded in such a way that the loop 133 can be installed through a grate opening 311 of the grate floor 300 without contact, or with only limited contact, with the walls of the grate opening 311, as for example shown in Figure 10 . This prevents the loop 133 from being damaged while installing the loop 133 through the grate opening 311, and possibly breaking as a result during further use of the device 100. As grate openings 311 of common grate floors 300 have a dimension of 30x30 mm, the loop 133 is preferably at least foldable to within these dimensions.
  • the suspension line 130 is surrounded by a protective sheath 135.
  • the protective sheath 135 is positioned along the suspension line 130 in such a way that, when the loop 133 is applied around the rod 110, supported by the supporting feet 120 at the first distance A1 from the grate floor 300, the protective sheath 135 extends over a predetermined range B along the suspension line 130 at the level of the first distance A1 below the rod 110.
  • the range B is preferably selected in such a way that the suspension line 130 is protected against damage over the entire height H1 of the grate floor 30.
  • the protective sheath 135 may also be applied around the suspension line 130 along the entire length of the suspension line 130, and the protective sheath 135 may also be applied around the loop 133 along the entire length of the loop 133.
  • the protective sheath 135 is preferably a polyester sleeve, but it may also be made from other materials known to the person skilled in the art that are suited for protecting the suspension line 130 and/or the loop 133.
  • the suspension line 130 is provided with a further connecting element 134 for connecting the suspension line 130 to the load 200. If so desired, further connection means between the load 200 and the further connecting element 134 may additionally be used.
  • Suspending a load 200 under a grate floor 300 using the device 100 according to the embodiment shown may be carried out as shown in the Figures 4-16 .
  • a good positioning of the device 100 is first selected, wherein the rod 110 can extend across a first supporting beam 320 and a second supporting beam 330 of the grate floor 300 to be able to be supported there by the two supporting feet 120 of the device 100.
  • the rod 110 should also be able to extend across a predetermined position P where the load 200 is to be suspended under the grate floor 300, wherein this position P is located between the first supporting beam 320 and the second supporting beam 330.
  • the rod 110 preferably also runs substantially parallel with its length direction L to the direction along which grating rods extend in the gratings 310 of the grate floor 300.
  • These grating rods are preferably also load-bearing grating rods for optimal support of the device 100 on the grate floor 300.
  • This positioning of the rod 110 allows the rod 110 to be neatly aligned over a series of grate openings 311 in the grate floor 300, which series extends according to said direction, and which also comprises a grate opening 311 which is located directly over the predetermined position P where the load 200 is to be suspended.
  • this allows the connecting element 133 at the first end 131 of the suspension line 130 to be easily positioned directly over the grate opening 311 over the predetermined position P, and the suspension line 130 to be suspended straight down through the grate opening 311 over the predetermined position P.
  • an auxiliary line 400 is then arranged through the grate opening 311 of the grate floor 300 located directly over the predetermined position P where the load 200 is to be suspended.
  • This auxiliary line 400 will be used in a further step for pulling the suspension line 130 through this grate opening 311 from below the grate floor 300 to above the grate floor 300.
  • one of the supporting feet 120 is positioned in the closed position, with its supporting surface 121 on the grate floor 300, over the first supporting beam 320, according to the positioning of the device 100 selected in the first step.
  • the locking pin 122 of the supporting foot 120 is inserted in a grate opening 311 of the grate floor 300 to prevent the supporting foot 120 from sliding on the grate floor 300.
  • the locking between the lower supporting foot portion 124 and the upper supporting foot portion 125 is undone for the supporting foot 120 by pulling the locking pin 1281 of the lower supporting foot portion 124 out of the locking opening 1282 in the upper supporting foot portion 125. Then, the upper supporting foot portion 125 is tilted relative to the lower supporting foot portion 124 to the open position of the supporting foot 120.
  • the rod 110 is then arranged in the first slot 126 of the supporting foot 120 located over the first supporting beam 320 of the grate floor 300.
  • the rod 110 is then also shifted in the first slot 126 until the flange 113 at the second end 112 of the rod 110 is located approximately over the position P where the load 200 is to be suspended under the grate floor 300.
  • the suspension line 130 is pulled by means of the auxiliary line 400 from under the grate floor 300 through the grate opening 311 located directly over the predetermined position P where the load 200 is to be suspended.
  • the connecting element 133 at the first end 131 of the suspension line 130 being the loop 133, is then first pulled through said grate opening 311 in the folded condition, so as to fit through the grate opening 311.
  • the further connecting element 134 at the second end 132 of the suspension line 130 will be left suspended under the grate floor 300 so as to be able to be connected to the load 200, eventually.
  • the auxiliary line 400 is detached from the suspension line 130, and the loop 113 is then opened and slid over the flange 113 at the second end 112 of the rod 110 so that the loop 113 is connected to the rod 110.
  • the upper supporting foot portion 125 of each supporting foot 120 is tilted relative to the lower supporting foot portion 124 to the closed position of the supporting foot 120. Then, the upper supporting foot portion 125 is locked at the lower supporting foot portion 124 by pushing the locking pin 1281 at the lower supporting foot portion 124 into the locking opening 1282 in the upper supporting foot portion 125.
  • Figure 14 shows the situation above the grate floor 300 in detail, wherein the rod 110 is supported by the two supporting feet 120 in the closed position supported on the grate floor 300 over the first supporting beam 320 and the second supporting beam 330, and wherein the rod 110 extends over the position P where the load 200 is to be suspended under the grate floor 300.
  • the loop 113 is connected to the rod 110 and the suspension line 130 extends downward through the grate opening 311 in the grate floor 300 located directly over this position P.
  • the suspension line 130 then extends further under the grate floor 300, as shown in Figure 15 , where the further connecting element 134 is also located, by means of which the device 100 can be connected to the load 200, as shown in Figure 16 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Floor Finish (AREA)
  • Blinds (AREA)
EP20804684.7A 2019-11-05 2020-11-04 Device and method for suspending a load under a grate floor Active EP4054968B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE20195763A BE1027732A9 (nl) 2019-11-05 2019-11-05 Inrichting en werkwijze voor het ophangen van een last onder een roostervloer
PCT/IB2020/060362 WO2021090199A1 (en) 2019-11-05 2020-11-04 Device and method for suspending a load under a grate floor

Publications (3)

Publication Number Publication Date
EP4054968A1 EP4054968A1 (en) 2022-09-14
EP4054968B1 true EP4054968B1 (en) 2023-11-22
EP4054968C0 EP4054968C0 (en) 2023-11-22

Family

ID=68617964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20804684.7A Active EP4054968B1 (en) 2019-11-05 2020-11-04 Device and method for suspending a load under a grate floor

Country Status (4)

Country Link
EP (1) EP4054968B1 (es)
BE (1) BE1027732A9 (es)
ES (1) ES2969328T3 (es)
WO (1) WO2021090199A1 (es)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3520514A (en) * 1968-04-08 1970-07-14 United States Steel Corp Adjustable gantry
US4030705A (en) * 1976-01-19 1977-06-21 Jacob Bontrager Vehicle supported motor lift
US7891626B2 (en) * 2007-04-24 2011-02-22 Spx Corporation Engine support system
KR200476339Y1 (ko) 2013-02-20 2015-02-16 한전케이피에스 주식회사 그레이팅 설치용 인양장치
AU2016279910B2 (en) * 2015-06-19 2020-07-09 Gridmesh Anchor Pty Ltd Grid mesh anchor

Also Published As

Publication number Publication date
BE1027732A1 (nl) 2021-06-01
BE1027732B1 (nl) 2021-06-08
EP4054968C0 (en) 2023-11-22
BE1027732A9 (nl) 2021-06-21
EP4054968A1 (en) 2022-09-14
ES2969328T3 (es) 2024-05-17
WO2021090199A1 (en) 2021-05-14

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