Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1983-02-14
1985-12-24
Herrmann, Allan D.
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
74425, 187 9R, F16H 1906, B66B 704
Patent
active
045598401
DESCRIPTION:
BRIEF SUMMARY
FIELD OF TECHNOLOGY
The present invention relates to a lifting apparatus and more particularly relates to a lifting apparatus useful for application to the elevator of an outdoor water quality detector installed.
BACKGROUND OF TECHNOLOGY
FIGS. 1 to 3 show a prior art apparatus of this kind. In the figures, the reference numeral (1) designates water to be tested, (2) a water quality detector, (3) a base, (4) a moving wheel, (5) and (6) designate supporters, (7) designates a container for containing a winding device, (8) a handle for raising and lowering operation, (9) a fitting plate, (10) a worm shaft, (11) a worm secured to the worm shaft (10), (12) a winding shaft, (13) a worm wheel and (14) a winding drum which is fixed together with the worm wheel to the winding shaft. The reference numeral (15) designates a wire having one end secured to the drum to control the raising and lowering of the water quality detector (2). The reference numeral (16) designates a pulley, (17) a guide roller, (18) a guide roller shaft, (19) a movable frame, (2) a water quality detector supporting arm, and (21) a bracket for holding the detector (2).
A description will now be made be made of the operation of the apparatus. In raising and lowering, the worm (10) and the worm wheel (11) in the container (7) are rotated by the revolution of the handle (8) with the consequence that the winding drum (14) is rotated through the worm wheel meshed with the worm (11). since this revolution causes the wire (15) to be wound, the movable frame (19) connected to one end of the wire (15) is vertically moved by the aid of the roller shafts (18) and the guide rollers (17) mounted on the movable frame and the supporters (5), (6). Thus, the water quality detector (2) is vertically moved through the bracket (21) and the water quality detector supporting arm (20) fixed to the movable frame (19).
In the conventional lifting apparatus described above, a winding drum for winding the wire has been needed and furthermore, when the apparatus is a substantial height, it has been necessary to use a large drum and movable frame. When the water quality detector is lowered by rewinding the drum (14) to loosen the wire (15) so that the deadweights of the water quality detector (2) and the movable frame (19) pulls them down, a smooth lowering operation can not be attained due to the small load and the frictional resistance of the sliding parts. Additionally, it has been disadvantageous in that it is difficult to conceal the container for containing the winding device and the movable frame guide rollers from the atmosphere and two supporters are needed thereby resulting a large apparatus.
DISCLOSURE OF THE INVENTION
The present invention provides a structure in which a lifting mechanism is contained in a cylindrical shaft and combination of a chain and a chain sprocket wheel is used. With this structure, a lifting apparatus having a single cylindrical shaft can be realized to provide reliable raising and lowering operation. In addition, the single cylindrical shaft as a supporter makes concealment of winding device from the atmosphere easy and provide an apparatus of compact, light weight, economical and beautiful in appearance.
BRIEF DESCRIPTION OF DRAWINGS
FIGS. 1 to 3 show the conventional lifting apparatus for a water quality detector, wherein FIG. 1 is a side view partly sectioned, FIG. 2 a front view partly sectioned and FIG. 3 is a sectional view taken along the line III--III of FIG. 2.
FIGS. 4 to 11 show a single cylindrical shaft type water quality detector rotary transferring lifting apparatus wherein FIG. 4 is a sectional side view showing a lifting mechanism held in the single single cylindrical shaft, FIG. 5 is a partly enlarged sectional view of sliding parts for raising and lowering operation, FIG. 6 is a sectional view taken along the line VI--VI of FIG. 5, FIG. 7 is an enlarged sectional view of a driving part for raising and lowering operation, FIG. 8 is a perspective view of the driving part, FIG. 9 is a perspective view of a casing
REFERENCES:
patent: 876730 (1908-01-01), Rushe
patent: 1249931 (1917-12-01), Eller et al.
patent: 1594513 (1926-08-01), Ainsworth
patent: 2565401 (1951-08-01), Smith
patent: 2860871 (1958-11-01), Schneider
patent: 3390815 (1968-07-01), Kavan et al.
patent: 4222461 (1980-09-01), Gunti
patent: 4358239 (1982-11-01), Dechantsreiter
Herrmann Allan D.
Mitsubishi Denki & Kabushiki Kaisha
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