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EP-3743368-B1 - HOISTING DEVICE

EP3743368B1EP 3743368 B1EP3743368 B1EP 3743368B1EP-3743368-B1

Inventors

  • KULTANEN, Tero

Dates

Publication Date
20260513
Application Date
20190125

Claims (6)

  1. A hoisting device comprising: a first part (1) movably connected to a running rail (2), a second part (3) suspended under the first part (1), hoisting means (4) arranged between the first part (1) and second part (3) to lift and lower the second part (3), and a scissors mechanism (5) is arranged between the first part (1) and second part (3) to prevent horizontal movement and twisting movement of the second part (3) in relation to the first part (1), c h a r a c t e r i s e d in that said second part (3) is a cage open on two sides, where a load is placed through its open sides, the hoisting device comprises one or more aligning members (21) to align the second part in the correct place in relation to a shelf, and said one or more aligning members (21) comprise one or more protruding pins located inside the second part (3) of the hoisting device during movement of the hoisting device, and when the hoisting device stops in the vicinity of the correct shelf position, said pins protrude outwards and orient themselves in counterparts (22) of the shelf to align the second part (3) in the correct place in relation to the shelf.
  2. A hoisting device as claimed in claim 1, c h a r a c t e r i s e d in that said hoisting means (4) comprise at least one flexible rope, which is fixed to the second part (3) at four fastening points to lift and lower the second part (3).
  3. A hoisting device as claimed in claim 1 or 2, c h a r a c t e r i s e d in that said scissors mechanism (5) comprises a plurality of beam pairs, at the centre of at least one beam pair there being a first joint (6) connecting the beams, and to the first end, second end, third end, and fourth end of said at least one beam pair, a second joint (7), third joint (8), fourth joint (9), and fifth joint (10) are arranged, which joints (7 to 10) rotatably connect said at least one beam pair to the previous and subsequent beam pair.
  4. A hoisting device as claimed in claim 3, c h a r a c t e r i s e d in that a first running rail (12) is arranged on a second surface (11) of the first part (1), and a second running rail (14) is arranged on a first surface (13) of the second part (3).
  5. A hoisting device as claimed in claim 4, c h a r a c t e r i s e d in that a first end part (15) of said scissors mechanism (5) is slidably fixed to the first running rail (12) by a first runner block (16), and a second end part (17) of the scissors mechanism (5) is rotatably fixed to the second surface (11) of said first part (1), and in that a third end part (18) of said scissors mechanism (5) is slidably fixed to the second running rail (14) by a second runner block (19), and a fourth end part (20) of the scissors mechanism (5) is rotatably fixed to the first surface (13) of said second part (3).
  6. A hoisting device as claimed in any one of the preceding claims, characterised in that at least one electrical wire (23) is arranged between the first part (1) and the second part (3), which electrical wire is fastened to the scissors mechanism (5).

Description

Field of the invention The present invention relates to hoisting devices. Description of the prior art It is previously known to use a hoisting device which comprises a top part movably fixed to a ceiling, and a bottom part suspended under it, as well as flexible hoisting means arranged between the top and bottom parts to lift and lower the bottom part. For instance, US 2005/0079041 A1 and DE19643347 A1 disclose such a hoisting device with a scissors mechanism. JP2001146303 A discloses a storage shelf system. JPH0710459A discloses a hoisting device according to the preamble of claim 1. A problem with such a hoisting device is that its bottom part is susceptible to swinging when the hoisting device in question is driven while the bottom part is down, in which case the bottom part is subject to a force of opposite direction in relation to the movement direction of the top part, and possibly twisting force around the height axis of the hoisting device. Another known solution is to use a hoisting device which has a pillar body and which is arranged to travel on rails on the floor and ceiling. However, such a hoisting device is often massive and, due to the floor rail, its use is limited to a space that has no underpasses, for example. Summary of the invention An object of the invention is thus to provide a device by means of which at least part of the aforementioned problems may be solved. The object of the invention is achieved with a device which is characterised by what is disclosed is the independent claim. Preferred embodiments of the invention are disclosed in the dependent claims. The above goal is reached by a hoisting device which comprises a first part movably connected to a running rail, and a second part suspended under the first part. In addition, the hoisting device comprises hoisting means arranged between the first part and second part to lift and lower the second part, as well as a scissors mechanism arranged between the first and second part to prevent the horizontal movement and twisting movement of the second part in relation to the first part. Brief description of the drawings The invention will now be described in closer detail in connection with the preferred embodiments, with reference to the accompanying drawings in which: Figure 1 shows a first embodiment of the hoisting device; andFigure 2 shows an enlarged conceptual view of aligning the second part of the hoisting device according to the first embodiment in the correct place in relation to a shelf. Description of at least one embodiment Figure 1 shows, by way of example, an overall view of the first embodiment of the hoisting device. With reference to Figure 1, the embodiment in question comprises a first part 1 movably fixed to a running rail 2 located above the first part 1. It is advantageous to fix a hoisting device exclusively to an overhead rail, because it allows the hoisting device to be used without a bottom rail in a storage, for example, having underpasses. Said hoisting device further comprises a second part 3 which is suspended under the first part 1, and hoisting means 4 arranged between the first part 1 and second part 3 to lift and lower the second part 3. Said second part 3 may be, for example, a cage open on two sides, where a load may be placed through its open sides. In addition, between the first part 1 and second part 3 there is arranged a scissors mechanism 5 to prevent the horizontal movement of the second part 3 in relation to the first part 1. Said hoisting means 4 may comprise at least one flexible rope, which is strung between the first part and the second part so that it fastens to the second part at four fastening points to lift and lower the second part 3. Said flexible rope may also be a strap or cable, for example. Alternatively, the hoisting means 4 may comprise, for example, four or more ropes, each of which is connected to the second part 3 each at its own fastening point. Said scissors mechanism 5 comprises a plurality of beam pairs. At the centre of at least one beam pair there is a first joint 6 rotatably connecting the beams, and to the first end, second end, third end, and fourth end of said at least one beam pair, a second joint 7, third joint 8, fourth joint 9, and fifth joint 10 have been correspondingly arranged. Said joints 7 to 10 rotatably connect said at least one beam pair to the previous and subsequent beam pair. Said joints 6 to 10 are advantageously implemented by using bearings. In the embodiment shown in Figure 1, in order to fasten said scissors mechanism 5 to the hoisting device, there is arranged on a second surface 11 (bottom surface in the drawings) of the first part 1, a first running rail 12, and on a first surface 13 (top surface in the drawings) of the second part 3, there is arranged a second running rail 14. A first end part 15 of the scissors mechanism 5 is slidably fixed to the first running rail 12 by a first runner block 16, and a second end part 17 of the scissor