Apparatus of MTL and transfer system including the same

1 . A maintenance lift (MTL) apparatus comprising:

an auxiliary track in contact with a travel rail forming a movement path of a transfer apparatus to extend a movement path of the travel rail;

a lift part configured to adjust a length of the lift part in a vertical direction or elevated or lowered to move the auxiliary track such that the auxiliary track is disposed at a first position where the auxiliary track is adjacent to a floor surface as compared with a position of the travel rail or is disposed at a second position where the auxiliary track is in contact with the travel rail; and

a body part provided with the lift part, the body part including wheels to move on the floor surface,

wherein the auxiliary track is configured to be elevated to the second position, and the transfer apparatus is configured to move between the travel rail of a position to which the body part is moved and the auxiliary track, and

wherein the lift part includes:

a frame on which the auxiliary track is installed; and

elevating or lowering members provided on the body part that include a cylinder adjusting a height of the frame.

2 . The MTL apparatus of claim 1 , wherein the cylinder includes a fork on which the frame is supported, the cylinder being configured to elevate or lower the fork using hydraulic pressure or pneumatic pressure so that a length thereof in the vertical direction is adjusted.

3 . A maintenance lift (MTL) apparatus comprising:

an auxiliary track in contact with a travel rail forming a movement path of a transfer apparatus to extend a movement path of the travel rail;

a lift part configured to adjust a length of the lift part in a vertical direction or elevated or lowered to move the auxiliary track such that the auxiliary track is disposed at a first position where the auxiliary track is adjacent to a floor surface as compared with a position of the travel rail or is disposed at a second position where the auxiliary track is in contact with the travel rail; and

a body part provided with the lift part, the body part including wheels to move on the floor surface,

wherein the auxiliary track is configured to be elevated to the second position, and the transfer apparatus is configured to move between the travel rail of a position to which the body part is moved and the auxiliary track, and further comprising:

a guide block installed on the travel rail, the guide block having a through hole formed to penetrate therethrough in the vertical direction and having a diameter decreasing toward an upward direction; and

a link installed on the auxiliary track and including a pin guided to the through hole to penetrate through the guide block.

4 . The MTL apparatus of claim 3 , further comprising:

a first stopper above the guide block, the first stopper being rotatably installed on the travel rail so as to interfere with the movement path by traversing the travel rail or open the movement path,

wherein the link is configured to push a lower portion of the first stopper in the upward direction in association with the elevation of the auxiliary track so as to rotate the first stopper.

5 . The MTL apparatus of claim 4 , further comprising:

a separation preventing part provided in the auxiliary track, the separation preventing part being configured to interfere with a path of the transfer apparatus or allowing movement of the transfer apparatus according to a rotation of the preventing part; and

a second stopper on a side surface of the separation preventing part in the auxiliary track, the second stopper being configured to limit a rotation angle of the separation preventing part in a first direction,

wherein the separation preventing part is configured to rotate and lie down in a second direction opposite to the first direction or stand so as to interfere with the path of the transfer apparatus, a rotation of the separation preventing part in the first direction in a state in which the separation preventing part stands being limited by the second stopper.

6 . A maintenance lift (MTL) apparatus comprising:

an auxiliary track in contact with a travel rail forming a movement path of a transfer apparatus to extend a movement path of the travel rail;

a lift part configured to adjust a length of the lift part in a vertical direction or elevated or lowered to move the auxiliary track such that the auxiliary track is disposed at a first position where the auxiliary track is adjacent to a floor surface as compared with a position of the travel rail or is disposed at a second position where the auxiliary track being in contact with the travel rail;

a body part provided with the lift part, the body part including wheels to move on the floor surface, the auxiliary track being configured to be elevated to the second position, and the transfer apparatus is configured to move between the travel rail of a position to which the body part is moved and the auxiliary track; and

an overturn preventing part provided in the body part, the overturn preventing part being configured to rotate in an outward direction on the basis of the body part to expand a support area of the body part, the overturn preventing part being configured to adjust a length of the overturn preventing part in the vertical direction to be in contact with the floor surface or be spaced apart from the floor surface.

7 . A transfer system comprising:

a travel rail forming a movement path of a transfer apparatus; and

an MTL apparatus in contact with or spaced apart from the travel rail,

wherein the MTL apparatus includes:

an auxiliary track configured to extend a movement path of the travel rail;

a lift part configured to adjust a length of the lift part in a vertical direction or elevated or lowered to move the auxiliary track so that the auxiliary track is disposed at a first position where the auxiliary track is adjacent to a floor surface as compared with a position of the travel rail or is disposed at a second position where the auxiliary track is in contact with the travel rail; and

a body part provided with the lift part, the body part including wheels to move on the floor surface, and

the auxiliary track being configured to be elevated to the second position, and the transfer apparatus being configured to move between the travel rail of a position to which the body part is moved and the auxiliary track, and

wherein the lift part includes:

a frame on which the auxiliary track is installed; and

a cylinder provided in the body part, the cylinder being configured to adjust a height of the frame.

8 . The transfer system of claim 7 , wherein

the cylinder includes a fork on which the frame is supported, the cylinder being configured to elevate or lower the fork using hydraulic pressure or pneumatic pressure so that a length thereof in the vertical direction is adjusted.

9 . The transfer system of claim 7 , wherein the MTL apparatus further includes a rotating plate provided at a position that the auxiliary track faces in the travel rail, the rotating plate being in contact with the auxiliary track according to elevating or lowering of the auxiliary track to axially rotate, the rotating plate being configured to connect the travel rail and an upper surface of the auxiliary track to each other.

10 . A transfer system comprising:

a travel rail forming a movement path of a transfer apparatus; and

an MTL apparatus in contact with or spaced apart from the travel rail,

wherein the MTL apparatus includes:

an auxiliary track configured to extend a movement path of the travel rail;

a lift part configured to adjust a length of the lift part in a vertical direction or elevated or lowered to move the auxiliary track so that the auxiliary track is disposed at a first position where the auxiliary track is adjacent to a floor surface as compared with a position of the travel rail or is disposed at a second position where the auxiliary track is in contact with the travel rail; and

a body part provided with the lift part, the body part including wheels to freely move on the floor surface, and

the auxiliary track being configured to be elevated to the second position, and the transfer apparatus being configured to move between the travel rail of a position to which the body part is moved and the auxiliary track, and

wherein the MTL apparatus further includes:

a guide block on the travel rail, the guide block having a through hole formed to penetrate therethrough in the vertical direction and having a diameter decreasing toward an upward direction; and

a link installed on the auxiliary track, the link including a pin guided to the through hole to penetrate through the guide block.

11 . The transfer system of claim 10 , wherein the travel rail includes an open track forming an open section so that the transfer apparatus is moved to outside of the movement path,

the MTL apparatus further including a first stopper above the guide block and rotatably installed on the travel rail so as to interfere with the movement path by traversing the travel rail or open the movement path, and

the link being configured to push a lower portion of the first stopper in the upward direction in association with the elevation of the auxiliary track so as to rotate the first stopper.

12 . The transfer system of claim 11 , wherein the travel rail includes a plurality of bay parts in which the transfer apparatus performs tasks and a passage part connecting the bay parts to each other, and

the open track is included in one or more of the bay parts.

13 . The transfer system of claim 11 , wherein the MTL apparatus further includes:

a separation preventing part in the auxiliary track, the separation preventing part being configured to interfere with a path of the transfer apparatus or allowing movement of the transfer apparatus according to a rotation of the preventing part; and

a second stopper on a side surface of the separation preventing part in the auxiliary track, the second stopper being configured to limit a rotation angle of the separation preventing part in a first direction, and

the separation preventing part being configured to rotate and lie down in a second direction opposite to the first direction or stand so as to interfere with the path of the transfer apparatus, a rotation of the separation preventing part in the first direction in a state in which the separation preventing part stands being limited by the second stopper.

14 . A transfer system comprising:

a travel rail forming a movement path of a transfer apparatus; and

an MTL apparatus in contact with or spaced apart from the travel rail,

wherein the MTL apparatus includes:

an auxiliary track configured to extend a movement path of the travel rail;

a lift part configured to adjust a length of the lift part in a vertical direction or elevated or lowered to move the auxiliary track so that the auxiliary track is disposed at a first position where the auxiliary track is adjacent to a floor surface as compared with a position of the travel rail or is disposed at a second position where the auxiliary track is in contact with the travel rail; and

a body part provided with the lift part, the body part including wheels so as to move on the floor surface, and

the auxiliary track being configured to be elevated to the second position, and the transfer apparatus being configured to move between the travel rail of a position to which the body part is moved and the auxiliary track; and

an overturn preventing part in the body part, the overturn preventing part being configured to rotate in an outward direction on the basis of the body part to expand a support area of the body part, the overturn preventing part being configured to adjust a length of the overturn preventing part in the vertical direction to be in contact with the floor surface or be spaced apart from the floor surface.