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EP-4180304-B1 - TROLLEY AND OFFSHORE STRUCTURE HAVING SAME

EP4180304B1EP 4180304 B1EP4180304 B1EP 4180304B1EP-4180304-B1

Inventors

  • KWON, DO HOON

Dates

Publication Date
20260513
Application Date
20210707

Claims (13)

  1. A trolley (1) for smoothly crossing obstacles comprising: a load plate (110) on which an object is loaded; a front wheel part (120) including a front wheel support (123) shaft-coupled to the front of the lower portion of the load plate (110), and a pair of wheels (121, 122) provided at both ends of the front wheel support (123), respectively, to rotate along the rotational radius of the shaft such that each wheel of the pair of wheels is selectively seated on the ground and driven, while traveling; a rear wheel part (130) including a rear wheel support (133) shaft-coupled to the rear of the lower portion of the load plate (110), and a pair of wheels (131, 132) provided at both ends of the rear wheel support (133), respectively, to rotate along the rotational radius of the shaft such that each wheel of the pair of wheels is selectively seated on the ground and driven, while traveling; and an actuation member (200) operatively connecting the pair of wheels (121, 122) of the front wheel part (120) and the pair of wheels (131, 132) of the rear wheel part (130) to be aligned with each other through a gear coupling structure and characterized by the actuation member (200) adapted to adjust the position of at least one of the pair of wheels (121, 122) of the front wheel part (120) to smoothly overcome the obstacle.
  2. The trolley (1) of claim 1, further comprising: a movement auxiliary member (300) between the load plate (110) and the front wheel part (120), wherein the movement auxiliary member (300) includes: a pinion gear (320) provided in the shaft of the front wheel part (120) and operatively connected with the actuation member (200); and a rack gear (310) provided in the lower portion of the load plate (110) and engaged with the pinion gear (320) to move the load plate (110) forward or backward by a certain distance according to the rotation of the pinion gear (320), wherein the pinion gear (320) rotates in the clockwise or counterclockwise direction according to the operation of the actuation member (200), to move the load plate (110) forward by a certain distance when the front wheel part (120) crosses objects, and move the load plate (110) backward by a certain distance when the rear wheel part (130) crosses objects.
  3. The trolley (1) of claim 1, wherein the actuation member (200) includes: an operation part (230) operating in a manual mode with a handle (232) or in an electric mode with a motor.
  4. The trolley (1) of claim 1, wherein the actuation member (200) includes: a first gear part (220) provided in the shaft of the rear wheel part (130); an operation part (230) connected with the first gear part (220) to rotate the first gear part (220); a second gear part (250) provided in the shaft of the front wheel part (120); and a shaft member (260) transmitting the rotary power of the first gear part (220) to the second gear part (250).
  5. The trolley (1) of claim 4, wherein the first gear part (220) includes: a first bevel gear (221) provided in the shaft of the rear wheel part (130); a second bevel gear (222) engaged with the first bevel gear (221) and connected with the operation part; and a third bevel gear (223) engaged with the first bevel gear (221) and connected with the shaft member (260), and wherein the second gear part (250) includes: a fourth bevel gear (251) provided in the shaft of the front wheel part (120); and a fifth bevel gear (252) engaged with the fourth bevel gear (251) and connected with the shaft member (260).
  6. The trolley (1) of claim 1, wherein the actuation member (200) includes: a first worm gear (420) provided in the shaft of the rear wheel part (130); an operation part (230) connected with the first worm gear (420) to rotate the first worm gear (420); a second worm gear (450) provided in the shaft of the front wheel part (120); and a shaft member (260) transmitting the rotary power of the first worm gear (420) to the second worm gear (450).
  7. The trolley (1) of claim 6, wherein the first worm gear (420) includes: a first worm wheel (421) provided in the shaft of the rear wheel part (130); and a first worm (422) engaged with the first worm wheel (421), and one side of which is connected to the operation part (230) and the other side of which is connected to the shaft member (260), and wherein the second worm gear (450) includes: a second worm wheel (451) provided in the shaft of the front wheel part (120); and a second worm (452) connected to the shaft member (260) and engaged with the second worm wheel (451).
  8. The trolley (1) of claim 1, further comprising: a steering member (600) connecting between the front wheel part (120) and the rear wheel part (130) through a linkage structure to change the traveling direction of the front wheel part (120) and rear wheel part (130) by operation of a handle (232).
  9. The trolley (1) of claim 8, wherein the steering member (600) includes: a steering handle (610) provided in the rear of the load plate (110); a rear wheel linking part (620) coupled to the lower portion of the load plate (110) and connected with the shaft of the rear wheel part (130); a front wheel linking part (630) coupled to the lower portion of the load plate (110) and connected with the shaft of the front wheel part (120); and a steering linking part (640) connecting the steering handle (610), rear wheel linking part (620) and front wheel linking part (630), and operating the rear wheel linking part (620) and front wheel linking part (630) by operation of the steering handle (610) to change the traveling direction of the front wheel part (120) and rear wheel part (130).
  10. The trolley (1) of claim 9, wherein the steering linking part (640) includes: a first steering frame (641) formed integrally with the steering handle (610) and connected with the rear wheel linking part (620); a second steering frame (642) connected with the front wheel linking part (630); and a steering link (643) connected between the first steering frame (641) and the second steering frame (642), wherein a hub (650) is provided in the shaft of the rear wheel part (130) and the shaft of the front wheel part (120) to connect each of the corresponding rear wheel linking part (620) and front wheel linking part (630), and wherein in the hub (650), the shaft of the rear wheel part (130) or front wheel part (120) is penetrated, and the rear wheel linking part (620) or front wheel linking part (630) corresponding to the outer surface is coupled.
  11. The trolley (1) of claim 1, further comprising: a first wheel drive means (510) provided in the front wheel support (123) to rotate at least one of the pair of wheels (121, 122) of the front wheel part (120); and a second wheel drive means (520) provided in the rear wheel support (133) to rotate at least one of the pair of wheels (131, 132) of the rear wheel part (130).
  12. An offshore structure (1000) comprising: a deck (10) on which an object is transported and installed; at least one coaming member (20) fixedly installed on the deck (10) to inhibit the dispersion of fluids; and a trolley (1) according to any one of the preceding claims passing the at least one coaming member (20) without using inclined ramps, and transporting the object to one region of the deck (10).
  13. An offshore structure (1000) comprising: an enclosed area (30) having a door for sealing the inside and a doorsill (40) of a predetermined height and selectively setting a positive or negative pressure thereinside; and a trolley (1) according to any one of claims 1 to 11 passing the doorsill (40) without using inclined ramps, and transporting the object to one region in the enclosed area (30).

Description

Technical Field The present invention relates to a trolley and an offshore structure having the same. More specifically, the present invention relates to a trolley freely crossing a coaming member installed in the hull or a doorsill of an enclosed area, and an offshore structure having the same. Background Art In general, offshore structures are constructed or operated in the ocean, and the hull of offshore structures includes a plurality of decks that form each floor. On the deck of the hull, various equipment or apparatuses may be installed. In order to collect fluids such as oil spilled from such equipment or apparatuses, seawater, rainwater or other contaminants or prevent the fluids from flowing to other equipment or apparatuses, coaming members of a predetermined height may be installed on the deck. In addition, a plurality of enclosed areas that are sealed by walls, etc., are formed on the deck in the hull. Each enclosed area has an entrance with a doorsill for tightly sealing the inside, and the entrance is opened and closed by a door. A trolley travelling on the deck to carry objects such as various materials, equipment or heavy things is provided in the hull, and the objects can be transported to a desired position using the trolley. However, there are numerous coaming members or doorsills of enclosed areas on the deck in the hull, and thus it was inconvenient for the trolley to travel on the deck. Fig. 1 and Fig. 2 illustrate the state in which a trolley 1 is operated in the offshore structure according to prior art. Referring to Fig. 1, when a worker carries an object using a trolley 1 and encounters a coaming member 2, according to prior art, an inclined ramp 3 should be additionally installed in the coaming member 2 so that the trolley 1 could cross the coaming member 2. Referring to Fig. 2, when a worker carries an object using a trolley 1 into an enclosed area, an inclined ramp might be installed to a doorsill 5 in the entrance of the enclosed area. However, in the case of a high doorsill 5, safety accidents might occur when a worker carries a heavy object and goes up and down the inclined ramp. Thus, at this time, the object was transported into the enclosed area using pad eyes 4 and lifting hoists (not shown). In other words, when the doorsill 5 is high, a worker has to exert considerable power when the trolley 1 loading a heavy object climbs the uphill slope of the inclined ramp installed in the doorsill 5, and the worker has to exert considerable power when the trolley 1 descends the downhill slope in order to prevent downward acceleration. Thus, there is a risk of safety accidents. Accordingly, the heavy object was transported using the pad eyes 4 and lifting hoists (not shown). As shown in Fig. 2, when a worker transports an object into the enclosed area using pad eyes 4 and lifting hoists (not shown), a pad eye 4 is installed in each upper portion inside and outside the door of the enclosed area. A lifting hoist (not shown) is installed in each pad eye 4. A trolley 1 loading an object is located outside the door of the enclosed area and another trolley 1' is located inside the door to face the trolley 1, with the doorsill 5 interposed therebetween. Then, the object loaded on the trolley 1 is lifted using a lifting hoist (not shown) and moved over the doorsill 5. The object lifted by the lifting hoist (not shown) is received by a lifting hoist (not shown) installed inside the door and loaded on another trolley 1', and disconnected from the corresponding lifting hoist (not shown) to be moved into the enclosed area over the doorsill 5. However, the way of using pad eyes 4 and lifting hoists (not shown) had problems that it takes too much time to install the pad eyes 4 or connect and disconnect the lifting hoists (not shown) to and from objects, and that heavy objects are moved while being hung in the air when passing the doorsill 5, which always causes the risk of accidents. KR 101 807 236 B1 discloses a wheelbarrow for facilitating the transportation of a load by rotation of bogies connecting drive portions formed in the lower portion of the wheelbarrow to move the drive portions in close contact with an obstacle. CN 106 218 680 B discloses a wheel turning type electric stair climbing delivery cart. DE 10 2016 013516 A1 discloses a transport trolley for use on ships having the following features: a) the transport trolley has an elongate load-bearing body and at least five wheel leg modules attached thereto, each wheel leg module having the following features: b) the wheel leg module comprises a horizontal support on the floor side with a first end and a second end and a leg part with a first end and a second end, such that the leg part is arranged with its first end centrally on the horizontal support, c) a first wheel is arranged at the first end of the horizontal support and a second wheel is arranged at the second end of the horizontal support, d) the leg part is articulated at its s