The Mechanical Handling and Storing of Material
Forfatter: A.-M.Inst.C E., George Frederick Zimmer
År: 1916
Forlag: Crosby Lockwood and Son
Sted: London
Sider: 752
UDK: 621.87 Zim, 621.86 Zim
Being a Treatise on the Handling and Storing of Material such as Grain, Coal, Ore, Timber, Etc., by Automatic or Semi-Automatic Machinery, together with the Various Accessories used in the Manipulation of such Plant
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572 THE MECHANICAL HANDLING OF MATERIAL
The Cradle.—This is of substantial construction, and is fitted with rollers which run
against the guides of the framework of the tip. The sides are A-shaped, and there is a
Figs. 814 and 815. Winch for Turning
pushed into position two automatic catches a a are forced
Figs. 816 and 817. Details of Working Parts of Cradle in Plan
and Elevation.
connecting piece at the top end which joins the
two together. On the water side are two stands,
accessible by steps, on which an attendant can
take up his position. The tipping portion is built
within the floor of the cradle, and is just wide
enough for the two main girders—which are con-
nected with each other by a framework of angle
iron—to carry the rails upon which the truck
stands. A strong girder at the end extends across
the two longitudinal girders, which run the full
width of the cradle, and the ends of this girder
are provided with attachments, to which the tipping
cables are attached. The rails on the tipping
portion of the cradle are level for about three-
quarters of their length, but are slightly bent up-
wards for the last quarter, thus bringing the truck to a standstill when it is pushed on
the cradle. As the truck i
forward and prevent it
from running backward.
This is shown in illustra-
tion, Figs. 816 and 817,
which gives the details of
the working parts of the
cradle in plan and eleva-
tion. Coupled with the
two catches a a are two
further catches bb which
secure the cradle in its
position when empty.
These are now withdrawn
in order that the cradle
may ascend. To make the
truck still more secure,
the coupling chain at the
end of the truck is attached
to the cradle itself. This
arrangement allows the
truck to advance to its
most forward position. As
soon as the tipping process
begins the truck rolls for-
ward into this extreme posi-
tion, and in doing so, it
automatically secures its
front axle by two substan-
tial hooks, which are
pressed upward. The actic
represent the hooks which
>n will be clearly understood from Figs. 818 and 819, which
fit the front axle of the truck. They are coupled together