THE DRAWINGS 35
Other objects and advantages of the present invention will become apparent from the following detailed de- scription of a preferred embodiment thereof taken in conjunction with the accompanying drawings, wherein:
FIG。 1is an axonometric view of a jack-up platform of the type operable to advantageously utilize the sub- ject locking invention;
FIG。 2 is a plan vie'x of the jack-up platform depicted
provision of a plurality of king posts 38。
The platform jacking operation may be achieved by a number of different techniques which are well known in the art。 One form of jacking mechanism for which the subject invention is particularly useful is that known as a rack and pinion jacking or elevating mechanism。 In this connection pinion gears 40 extend upon opposite sides of each of the chords 34 and matingly engage with a longitudinally extending rack which is fixedly con- nected to diametrically opposed surface of each of the
in FIG。 1 including the disclosure of four jack-up legs 45 chords。 In operation the pinion gears are rotated
having three chords each and a plurality of intercon-
necting bracing, wherein the platform legs are raised and lowered relative to the deck by the provision of a rack and pinion jacking units positioned at each of the
leg chords; 50
FIG。 3 is a detailed elevational view of a preferred
embodiment of the subject locking mechanism in a dis- engaged posture;
FIG。 4 is a plan view of the subject locking apparatus
as depicted in FIG。 3 in a disengaged posture; 55
FIG。 5, note sheet four, is a plan view of the subject
locking apparatus wherein the chock is actuated into an engaged and locked posture with respect to racks ex- tending upon either side of a platform leg chord; and
FIG。 6, note sheet three, is a plan view of the subject locking apparatus depicted in FIG。 5 in an engaged posture。
DETAILED DESCRIPTION
Context of the Invention 65
Before presenting a detailed description of the subject jack-up platform locking apparatus, it may be worth- while to briefly outline the context of the instant inven-
through hydraulic or electric drive mechanisms mounted on or within the deck and wherein rotation of the pinion in one direction will serve to extend the legs relative to the deck 12 while rotation of the pinion in an opposite direction will serve to retract the legs 14 rela- tive to the deck。
LOCKING APPARATUS
Turning now to the remaining drawings viz。 FIGS。 3—6, there will be seen a single chord 34 of one of the platform legs 14。 A rack 42 extends longitudinally along and is fixedly connected to each side of the chord 34。
The subject invention is directed to a locking mecha- nism 50 which is designed to selectively engage with teeth of the rack 42 and effectively lock the deck and legs together in a manner which will be discussed in detail herein presently。
Each of the jack-up platform lock assemblies 50 in- cludes a frame 52 which is vertically adjustable and guided by pins 54 which are fixedly mounted upon a section 56 of the deck, note FIGS。 4 and 6。 Further in this regard, the frame 52 is provided with vertical ad- justment guide loops 58 having an elongate aperture 60 自升式平台锁定装置英文文献和中文翻译(4):http://www.youerw.com/fanyi/lunwen_96548.html