Lifter

1. A lifter that is detachably disposed on a ceiling, the lifter comprising:

a frame that includes a loading part on which a product is placed, the frame formed to be transportable;

a motor part coupled to the frame;

a drum rotatably coupled to the motor part and including a plurality of winding parts formed at regular intervals along a rotary shaft direction;

a plurality of wires connected to be wound around the plurality of winding parts, respectively, and

a plurality of connection members formed to be detachably fixable to the ceiling;

wherein one end of each of the plurality of wires is connected to a respective one of the plurality of winding parts, and another end of each of the plurality of wires is detachably fixable to each of the plurality of connection members,

wherein the motor part and the drum are disposed below a center of the frame under the loading part,

wherein when the frame is positioned on a floor, the plurality of connection members are detachably fixed to the ceiling,

wherein when the drum rotates in one direction, the plurality of wires are wound on the plurality of winding parts of the drum so that the frame, in which the motor part and the drum are disposed, moves up to be close to the ceiling, and when the drum rotates in a direction opposite to the one direction, the plurality of wires are unwound from the plurality of winding parts of the drum so that the frame moves down and positioned on the floor.

2. The lifter according to claim 1 , wherein the drum comprises:

a core; and

a plurality of ribs formed vertically on an outer peripheral surface of the core and disposed at regular intervals along the rotary shaft direction to partition the plurality of winding parts.

3. The lifter according to claim 2 ,

wherein the frame comprises a plurality of vertical pulleys disposed radially from the center of the frame, and

wherein the plurality of vertical pulleys are disposed between the one ends and the other ends of the plurality of wires respectively to change a direction of the plurality of wires to a direction perpendicular to the ceiling.

4. The lifter according to claim 3 , wherein the plurality of winding parts comprises first to fourth winding parts, and

wherein the plurality of wires comprises first to fourth wires wound around the first to fourth winding parts, respectively.

5. The lifter according to claim 4 , wherein the plurality of ribs comprises first to fifth ribs, and

wherein each of the first to fourth winding parts is formed between two adjacent ribs among the first to fifth ribs.

6. The lifter according to claim 5 , wherein the plurality of vertical pulleys comprise first to fourth vertical pulleys disposed radially from the center of the frame, and

wherein the first to fourth wires are wound around the first to fourth vertical pulleys, respectively.

7. The lifter according to claim 6 , wherein the first to fourth vertical pulleys are disposed horizontally on the same plane.

8. The lifter according to claim 6 , further comprising:

a plurality of horizontal pulleys disposed between the one ends of the plurality of wires and the plurality of vertical pulleys, respectively.

9. The lifter according to claim 8 , wherein the plurality of horizontal pulleys comprise first to fourth horizontal pulleys facing the outer peripheral surface of the drum, and

wherein the first to fourth horizontal pulleys are disposed between the one ends of the plurality of wires and the first to fourth vertical pulleys, respectively, and the first to fourth wires are wound around the first to fourth horizontal pulleys, respectively.

10. The lifter according to claim 9 , wherein the first and second horizontal pulleys are positioned at one side of the drum, and

wherein the third and fourth horizontal pulleys are positioned at a side opposite to the first and second horizontal pulleys with respect to the drum.

11. The lifter according to claim 10 , wherein each rotary shaft of the first to fourth vertical pulleys is disposed to be parallel with the ceiling, and

wherein each rotary shaft of the first to fourth horizontal pulleys is disposed to be perpendicular to the rotation shaft of the first to fourth vertical pulleys.

12. The lifter according to claim 2 , further comprising:

a plurality of pressurization parts configured to be inserted to the plurality of winding parts, respectively, and pressurize the plurality of wires wound around the plurality of winding parts towards the core, respectively.

13. The lifter according to claim 12 , wherein each of the plurality of pressurization parts comprises:

a pressurization member coming into contact with each of the plurality of wires; and

a fixing member coupled to the pressurization members to enable the pressurization member to rotate.

14. The lifter according to claim 13 , wherein an elastic member is disposed at one end of the fixing member, and

wherein the elastic member is connected to a lower extending part extending to be parallel with a shaft direction of the drum at a certain interval from the drum.

15. The lifter according to claim 3 , wherein the frame further comprises:

a square main body part facing the ceiling; and

an extending part formed at each corner of the main body part,

wherein the plurality of vertical pulleys are disposed on each extending part.