JPS5988519A - Vertically movable deck type working platform - Google Patents

Abstract

PURPOSE:To reduce the cost of an elevator device and legs by a method in which a horizontal load supporter consisting of plural rollers provided to a cord part projected along legs and an oil-pressure cylinder to press the rollers is provided between each leg and a hull. CONSTITUTION:A supporter consisting of rollers 16 and an oil-pressure cylinder 17 is set in a mutually facing manner on both sides of a cord part 13. The rollers 16 are pushed onto the part 13 movably in the horizontal direction by the oil-pressure cylinder 17, and the cylinder 17 is fixed to a hull 5 or a bridging structure 6, where the cylinder 17 is fixed to at least two places of the upper part 15a of the structure 6, the neighborhood 15b of the main deck 21, and the neighborhood 15c of the lower deck 22. The horizontal force 18 to be transmitted between the legs 8 and the bridging structure 6 or the hull 5 becomes a force 19 by the device 15, but not the load of a pinion 7, so that the capacity of the elevator can be correspondingly made smaller and the weight reduction of the legs 8 is made possible by the reaction 20 of the pinion due to the horizontal force 18.

Description

DETAILED DESCRIPTION OF THE INVENTION The base gate relates to a deck elevating work platform (hereinafter referred to as a work platform).

Towing this type of workbench, as shown in the side view of Figure 1,
The work is carried out by loading the workbench 4 on top of the barge 3 floating on the sea surface 1, or with the hull 5 directly floating on the sea surface 1,
The membrane removal 8 is fixed to the hull 5 in the state of being pulled up to the uppermost position, and the load of the legs 8 to the hull 5 is transmitted to the frame 6 as shown in the partially enlarged plan view of FIG. 3 and the perspective view of FIG. 4. This is accomplished by a pinion 7 attached to the leg 8 and a rack 14 attached to the cord member 13 of the leg 8.

However, in such a workbench, the inertia force 10 acting on the legs 8 due to the shaking of the ship acts directly as a pinion load 9, so this is especially true when the legs 8 are long, that is, when the workbench 4 is in deep water. However, there is a drawback that the pinion load 9 during towing becomes excessive.

In the working state, as shown in the side view of Figure 2, the legs 8
Since the ship is placed on the seabed 2 and the hull 5 is fixed above the sea surface 1, the workbench 4 is subjected to external forces due to wind], 1 and waves,
External forces such as tidal currents act, and in this case too, the pinion load increases due to these external forces, so the capacity of the lifting device consisting of the rack and pinion must be increased when the hull 5 is raised or lowered. It won't happen.

The present invention has been proposed in view of the above circumstances, and has the advantage of preventing loads other than the vertical loads of the hull and legs from acting on the binions and reducing the capacity of the lifting device.
The purpose of this project is to provide a low-cost deck-elevating work platform in which the forces generated between the hull and the frame have a significant effect on the structural strength of the legs. A plurality of rollers each disposed in contact with the edge of the cord member to support the horizontal load of the legs along the surface of the cord member, and a hydraulic cylinder that presses each of the rollers against both side edges of the cord member and a horizontal A feature is that a load support device is provided between each leg and the hull.

An embodiment of the present invention will be explained with reference to the drawings. FIG. 5 is a plan view showing the legs and frame thereof, FIG. 6 is a partially enlarged plan view of the legs in FIG. 5, and FIG. 7 is a side view of FIG. 5. , FIG. 8 is the upper side view showing the part where the load support device of FIG. 6 is attached, and the same symbols as in FIGS.
- 4 show the same members, 15 is a load support device according to the present invention, as shown in FIG.
a, near the main deck 21 15b, near the lower deck 22 15c
Although it is installed in at least two locations.

It can also be installed at any height between the upper part 15a and the lower deck part 15c.

The support device 15 consists of a roller 16 and a hydraulic cylinder 17, which are arranged opposite to each other on both sides of the cord member 13, the roller 16 is in contact with the cord member 13, and the roller 16 is in contact with the cord member 13.
is pressed against the cord member 13 so as to be horizontally movable by a hydraulic cylinder 17, and the hydraulic cylinder 17 is fixed to the hull 5 or the frame 6.

In addition, as a substitute for the hydraulic cylinder 17, it is also possible to use an elastic pad, a screw jack, or the like.

In such a load supporting device, as shown in FIG. 5, the horizontal force 1 to be transmitted between the legs 8 and the frame 6 or the hull 5
8 is supported by the horizontal load support device 15 and becomes a force 19 between the cord member 13 and the roller 16, so it does not become a load on the pinion 7.

Incidentally, if the load support device 15 is not present, the force 19
It is clear that a pinion reaction force 20 is generated against the pinion 7 at this time, and a large bending moment is generated locally in the cord member 13.

In the present invention, since the load acting on the pinion 7 is not affected by the horizontal force 18 by removing the support device 15, the capacity of the lifting device can be reduced accordingly.

Furthermore, in the leg 8, there is no need to determine the strength of members such as the cord member 13 by the binion reaction force 20 caused by the horizontal force 18, so that weight reduction is possible.

Furthermore, a guide shoe, which was conventionally necessary, is no longer necessary.

In short, according to the present invention, a plurality of rollers are disposed in contact with both side edges of a cord member protruding along the leg and support the horizontal load of the leg along the surface of the cord member, and A horizontal load support device consisting of hydraulic cylinders that press rollers against both edges of the cord member is installed between each leg and the hull, thereby creating a deck elevating work platform that reduces the cost of the elevating device and the legs. Therefore, the present invention is extremely useful industrially.

[Brief explanation of the drawing]

Figures 1 and 2 are side views showing a known deck elevating work platform during towing and work, respectively, and Figure 3 is a side view of a known deck lifting type work platform.
FIG. 4 is a partially enlarged plan view showing one leg 8; FIG. 4 is a partially enlarged perspective view of FIG. 3; FIG. 5 is an enlarged plan view of a leg showing an embodiment of the present invention, and FIG.
5 is a partially enlarged plan view of the leg shown in FIG. 5, FIG. 7 is a side view of the leg shown in FIG. 5, and FIG. 8 is a side view of the leg shown in FIG. 5. Hull, 6. Frame, 7. Pinion, 8. Legs.
13... Cord member, 14... Rack. 15... Load support device, 15a... Near the top, 15b...
・Near the main deck, 15c.・Near the lower deck, 16..Roller, 17..Hydraulic cylinder, 18..Horizontal force, 19.
・Force, 20.・Pinion reaction force, 21.・Main deck, 22.
・Lower deck, Sub-Agent and Patent Attorney Masa Tsukamoto also has 8 illustrations.

Claims (1)

[Claims] A plurality of rollers are disposed in contact with both side edges of a cord member protruding along the leg and support the horizontal load of the leg along the surface of the cord member, and the rollers are respectively disposed on both sides of the cord member. A deck elevating work platform characterized in that a horizontal load support device consisting of a hydraulic cylinder that presses against the edge is provided between each leg and the hull.