| 摘要 |
PROBLEM TO BE SOLVED: To provide driving units for opening and closing a greenhouse with a good operating efficiency during maintenance or construction. SOLUTION: The driving units 5a to 5d for opening and closing the greenhouse are equipped with a driving motor 17, a speed reducer 18 having an output shaft 31 subjected to speed reduction and rotation by driving the driving motor 17 and a setter 19 for setting the number of revolutions of the output shaft 31. The speed reducer 18 is composed by housing a speed reducing mechanism 26 in a housing case 25. The setter 19 is composed by housing a setting mechanism 42 in a housing case 41. Both the housing cases 25 and 41 are mutually demountably mounted. The output shaft 31 of the speed reducing mechanism 26 and a transmission shaft 51 of the setting mechanism 42 are mutually freely engageably and disengageably connected with a fitting hole 36 and a fitting part 53. The connection of the output shaft 31 to the transmission shaft 51 is released when the setter 19 is removed from the speed reducer 18 by using the driving units 5a to 5d. |
