Human powered rail bike

1. A human powered rail bike, comprising:

a chassis having a predetermined shape;

rail wheels comprising a pair of front wheels and rear wheels, which are mounted to front and rear portions of the chassis, are spaced apart from each other, and movably support the chassis on a track, the front and rear wheels being connected via respective axles and rolling along two rails of the track which are arranged side by side;

a plurality of seats mounted to the chassis, and arranged parallel to the track to be spaced apart from each other and face each other;

a one-way clutch capable of changing direction, the one-way clutch mounted to at least one axle and limiting a rotating direction of the associated axle to one direction, that is, a forward direction or a backward direction;

a plurality of crank pedals positioned at a center between the facing seats and rotatably mounted to the chassis, each of the crank pedals being connected to the one-way clutch capable of changing direction via a chain;

a direction conversion lever for converting a rotating direction of the one-way clutch capable of changing the direction; and

a pair of brake units mounted to the front and rear portions of the chassis, and selectively or simultaneously reducing rotating speed of the front and rear wheels or stopping the front and rear wheels according to a moving direction.

2. The human powered rail bike according to claim 1 , wherein

each of the brake units comprises a hydraulic brake having a brake disc secured to each of the axles, a hydraulic caliper selectively holding the brake disc, and a hand brake lever connected to the caliper via a cable and operating the caliper, and

the hand brake lever is mounted to the direction conversion lever.

3. The human powered rail bike according to claim 2 , further comprising a guide plate having a shift range slot, the shift range slot comprising:

a shift part permitting movement of the direction conversion lever only when the hand brake lever is pulled; and

positioning parts bent and extended from both ends of the shift part in the same direction, releasing restraint of the hand brake lever, and preventing movement of the direction conversion lever.

4. The human powered rail bike according to claim 1 , wherein each of the seats is mounted to the chassis to be movable in a moving direction and to be secured to a predetermined position, so that an interval between the seat and the crank pedals is adjustable.

5. The human powered rail bike according to claim 4 , wherein an upper plate is provided in a lower portion of a central region of the chassis so that the upper plate does not hinder pedaling motion.

6. The human powered rail bike according to claim 1 , wherein the one-way clutch capable of changing direction comprises: an outer sleeve having on one end thereof a sprocket wheel, with a guide slot formed in a circumference of the outer sleeve;

an inner sleeve having a plurality of locking protrusions provided at regular angular intervals on an outer circumference of the inner sleeve to correspond to the guide slot, and inserted into the outer sleeve, with a bearing interposed between the outer sleeve and the inner sleeve, the axle being fitted into and secured to the inner sleeve;

a pair of ratchet plates supported on both ends of the guide slot in an axial direction thereof to permit lever movement, free ends of the ratchet plates being alternately positioned between each of the locking protrusions of the inner sleeve and a side of the guide slot in a circumferential direction thereof, so that the ratchet plates drive the outer sleeve and the inner sleeve in opposite directions;

a switching block supported in the guide slot to be movable in the axial direction thereof, and alternately and elastically pressing the ratchet plates so that each of the ratchet plates is located between each of the locking protrusions of the inner sleeve and a side of the guide slot in the circumferential direction thereof; and

a manipulation cover coupled to an outer portion of the outer sleeve to surround the switching block, and moving the switching block in an axial direction.

7. A safety switch device for manipulating a one-way clutch capable of changing direction from an exterior, the one-way clutch including an outer sleeve having in a circumferential surface thereof a guide slot and connected to a shaft of a driving source via power transmission means, an inner sleeve radially having on an outer circumference thereof a plurality of locking protrusions to correspond to the guide slot, rotatably coupled to the outer sleeve, and secured to a driven shaft equipped with driving wheels, a pair of ratchet plates supported on both ends of the guide slot to undergo lever movement, a switching block moving in the guide slot in an axial direction thereof and alternately positioning each of the ratchet plates between each of the locking protrusions and a circumferential side of the guide slot, and a manipulation cover secured to surround the outer sleeve and moving the switching block, wherein the safety switch device comprises:

a direction conversion lever having on an upper end thereof a handle and supported to a chassis via a pivot, a lower end of the direction conversion lever being connected to the manipulation cover;

a brake disc secured to the driven shaft;

a hydraulic caliper selectively holding the brake disc, thus restraining or releasing the brake disc;

a hand brake lever connected to the hydraulic caliper via a cable, and mounted to the direction conversion lever via a pivot to move towards or away from the handle, thus operating the hydraulic caliper; and

a guide plate having a shift range slot including a shift part permitting movement of the direction conversion lever only when the hand brake lever is pulled and the brake disc is restrained by the hydraulic caliper, and positioning parts bent and extended from both ends of the shift part in the same direction, releasing restraint of the hand brake lever, and preventing movement of the direction conversion lever.

8. The safety switch device according to claim 7 , wherein a locking recess is formed in the shift part of the shift range slot of the guide plate, so that the hand brake lever is fitted into the locking recess while the hand brake lever is pulled.

9. The safety switch device according to claim 7 , wherein the shift range slot of the guide plate has a rectangular shape, and a gap adjusting plate having a longitudinal hole for adjusting a position in an operating direction of the hand brake lever is fastened to a predetermined portion of the guide plate, thus partitioning the shift range slot into the shift part and the positioning parts, in addition to adjusting a width of the shift part.

10. The safety switch device according to claim 9 , wherein a locking recess is formed in a front end of the gap adjusting plate, so that the hand brake lever is fitted into the locking recess while the hand brake lever is pulled, thus being secured to a predetermined position.

11. A safety switch device for manipulating a one-way clutch capable of changing direction from an exterior, the one-way clutch including an outer sleeve having in a circumferential surface thereof a guide slot and connected to a shaft of a driving source via power transmission means, an inner sleeve radially having on an outer circumference thereof a plurality of locking protrusions to correspond to the guide slot, rotatably coupled to the outer sleeve, and secured to a driven shaft equipped with driving wheels, a pair of ratchet plates supported on both ends of the guide slot to undergo lever movement, a switching block moving in the guide slot in an axial direction thereof and alternately positioning each of the ratchet plates between each of the locking protrusions and a circumferential side of the guide slot, and a manipulation cover secured to surround the outer sleeve and moving the switching block, wherein the safety switch device comprises:

a direction conversion lever having a first lever pivoted at an upper end thereof to a chassis and connected at a lower end thereof to the manipulation cover, and a second lever pivoted to the upper end of the first lever to be operated in a direction perpendicular to the first lever;

a brake disc secured to the driven shaft;

a hydraulic caliper selectively holding the brake disc, thus restraining or releasing the brake disc;

a brake wire connecting the second lever of the direction conversion lever to the hydraulic caliper, and elastically biased towards the hydraulic caliper; and

a guide plate having a shift range slot including a shift part permitting rotation of the first lever only when the second lever of the direction conversion lever is pulled and the brake disc is restrained by the hydraulic caliper, and positioning parts bent and extended from both ends of the shift part in the same direction, releasing restraint of the second lever, and preventing rotation of the first lever.