JPS6337755B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Waterproofing of hatch covers is normally achieved by means of protrusions of the combing which are housed (affixed with adhesive) within the channel material on the underside of the cover panel and which are pressed into rubber seals. In other words, the rubber compressed by the narrow surface is subjected to considerable mechanical pressure. This, together with the effects of wind and weather, shortens the life of the rubber seals of the hatch cover. Depending on the type of cover, the movement of the seal over the protrusions during the final stage of the closing operation and the preliminary stage of the opening operation can also cause considerable wear. Also, if the cover is large, the movement of the coaming during sailing will quickly damage the seals that are secured to the protrusions.

For this reason, the rubber gaskets must be replaced from time to time. The useful life of the packing depends on the method of maintenance and the weather conditions in the area where the ship is being transported. Since such a gasket is fixed to the channel material with adhesive to prevent leakage from occurring between the gasket and the bottom of the channel material, it always takes time to replace it.

One method is to close the top surface of the coaming by interlocking a rubber seal with the protrusion, but in this case the structure of the coaming must be very straight and rigid. This is because so far it has not been possible to provide a seal that is elastic enough to accommodate the distortions of the combing structure.

It is an object of the present invention to solve the above-mentioned problem and to provide a shape which provides a good seal on the top surface of the coaming without being worn away by the movement of the protrusions, and which also has a shape sufficient to seal the coaming surface which is not necessarily flat. An object of the present invention is to provide a packing having flexibility. When the panel is closed, its internal pressure increases and the channel material holds the packing very tightly, eliminating the need for adhesive bonding to prevent leakage between the packing and the bottom of the channel material, and subjecting it to the vigorous movement of combing. The seal will never twist within the channel material, even if

The sealing device according to the invention consists of a lower part having a basically V-shaped cross section and an upper part having a shallow U-shaped groove.
It is characterized by the formation of two vertically extending passages that face each other across the vertical center plane. As a result, the contact surface is narrow during sliding, and the seal is reliably compressed in the final stage, allowing it to adapt to possible irregularities in the combing, even though no projections are required.

The width of the lower tip is 20% of the maximum width of the patch.
The width of the U-shaped groove is preferably at least three times the width of the lower tip.

Both passages are preferably tapered in cross section and provided approximately parallel to both sides of the lower V-shape. The cross section of the passage is preferably widest near the longitudinal center plane of the packing and gradually narrows outward.

The width of the seal preferably exceeds its height, and the outer corner of the top of the seal is cut diagonally to approximately the same depth as the bottom of the U-shaped groove in the top of the seal. desirable.

The angle of the tip of the lower part of the packing is relatively large,
On the other hand, it is better for the angle that defines the shape of the upper part of the seal to be much smaller than that. The channel material surrounds substantially the entire top.

Preferably, the seal is made of a rubber compound containing sufficient butadiene to ensure a shore hardness of about 50-55.

The present invention will now be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of a portion of a hatch cover of the type in which a closure device according to the invention may be successfully utilized.

FIG. 2 is a cross-sectional view of a sealing device according to the invention;
FIG. 3 is an explanatory diagram showing the principle of packing compression.

FIG. 1 shows a hatch opening 10 surrounded by a coaming 11 and closed by two sets of cover panels.
represents a part of. One set of cover panels 12 and 13 shows the state in the middle of the closing operation, and the other set shows the cover panel 14 in the closed position.
Shown as

The panels 12 are hinged to the combing sides. A pair of panels 12, 13 are shown with solid lines in the early stages of the closing operation and dashed lines in the later stages. The panels may be operated arbitrarily by any known method, and in the example shown here, panels 12, 1
This is done by a hydraulic actuator 15, which also acts as a hinge between 3 and 3.

The panel 13 is moved by wheels 16 at its outer ends. It is clear that at the end of the closing movement the panel assumes an almost horizontal position and at the same time is pushed in the direction of the folding panel 14.

During this combined horizontal and vertical movement, panel 13
The attached padskin slides on the combing. If the coaming had been of the older type with upright projections, it would have caused considerable wear.

Some designs have adjusted the coaming to allow the wheels to fall into recesses when the panel reaches the closed position to reduce sliding wear.

The wheels then carry the panel during the closing operation, so that the seal does not come into direct contact with the coaming until the wheel falls into the recess. However, these devices are quite expensive and require maintenance and maintenance costs.

In the present invention, a sealing device as shown in FIG. 2 is used. This device consists of channel material 17 provided along both longitudinal sides of the bottom surface of the panel.

The width of the channel material 17 exceeds the height, and the channel mouth is narrower than the bottom.

An elastic packing 18 is housed inside the channel material, and it is desirable that the width of the packing exceeds the height. The cross section of the packing is basically V-shaped and consists of an upper part 19 and a lower part 20. The side surfaces of the lower portion 20 are inclined to each other, and the angle (apex angle) α of the tip portion is significantly large. This means that the width of the V-shaped tapered tip 21 becomes considerably narrower, and is preferably less than 20% of the maximum width of the packing. Its tapered tip acts as a contact surface with the combing, providing low sliding resistance during the closing operation and being effectively compressed during the final stage.

The upper part 19 of the packing is shaped to fit into the channel material 17 and is held therein without the use of adhesive. The shape of the V is defined by both sides adjusted to a fairly small angle β.

The upper surface facing upward has a groove 22 extending vertically.
is formed. The width of this groove occupies a significant portion of the width of the packing, preferably at least three times the width of the lower tip 21.

Both corners 24 of the upper part of the packing are partially cut diagonally so that the depth is approximately the same as the depth of the groove 22.

The two passages 23 each vertically pass through the upper part of the packing and near the boundary between the lower parts 19 and 20,
They are located facing each other across the vertical center plane of the patch. Both passages have a tapered cross section and are positioned so as to have approximately the same inclination as the adjacent V-shaped side surface at the bottom of the packing.

The cross section of the passage 23 is widest near the vertical center plane and becomes narrower toward the outside.

The packing 18 is made of a rubber compound containing sufficient butadiene to ensure a shore hardness of about 50-55. Butadiene enhances the sliding properties and also makes the packing material harder than conventional packing materials, allowing a complete seal to be achieved without the use of upright protrusions.

In order to explain the function of the packing during compression, the horizontal plane including the bottom surface of the groove 22 is indicated by A-B,
The interface between the upper and lower parts of the packing immediately below the channel material 17 is shown by C-D.

Transfer the corner sections A-B and CD to Fig. 3. The solid line portion diagrammatically represents the packing in an unloaded state.

Point E represents the tip 21 of the lower part of the packing, and point F is located at the center of the bottom of the groove 22.

When the packing is completely compressed, point E moves to a new position E', and at the same time the groove bottom is pressed against the bottom of the channel material, so that its center point moves to a new position F'. The passage 23 is then completely blocked.

Points C and D are pushed outward, which means that the pressure against the sidewalls of the channel material increases. Points A and B are also pushed outwards somewhat so that the voids at the cut corners are closed and the packing completely fills the channel material. In the operating state, the contact surface communicating with the coaming is naturally wider than in the state of FIG. 2, when the seal is not yet under the closing pressure.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a portion of a hatch cover of the type in which the closure device according to the invention may be advantageously utilized. FIG. 2 is a cross-sectional view of the sealing device according to the present invention, and FIG. 3 is an explanatory diagram showing the principle of compressing the packing. 12, 13, 14...hatch cover panel, 1
7...Channel material, 18...Patzkin, 19...
...Putskin upper part, 20...Putskin lower part, 21...
...Tip of the lower part of the packing, 22...U-shaped groove, 23
...Aisle, 24... corner.

Claims (1)

[Claims] 1. In a sealing device consisting of a channel material 17 provided in hatch cover panels 12 to 14 that house an elastic packing 18 and move horizontally and vertically in the final stage of the closing operation. , Patsukin 18
The lower part 20 has a width that exceeds its height and a cross-sectional shape that is basically V-shaped.
and an upper part 19 having a shallow U-shaped groove 22;
This sealing device for a hatch cover is characterized in that two passages 23 extending in the vertical direction are formed inside the seal at positions facing each other across the longitudinal center plane thereof. 2 The width of the tip 21 of the lower part 20 is the same as that of the packing 18.
2. The hatch cover sealing device according to claim 1, wherein the width of the hatch cover is 20% or less of the maximum width of the hatch cover. 3. The hatch cover sealing device according to claim 1 or 2, wherein the width of the U-shaped groove 22 is at least three times the width of the lower tip 21. 4. The passageway 23 according to any one of claims 1 to 3, wherein the cross section of the passage 23 is tapered and is formed to be substantially parallel to the sides of the lower V-shape. Hatch cover sealing device. 5. The sealing of the hatch cover according to claim 4, wherein the cross section of the passage 23 is widest near the vertical center plane of the packing 18 and gradually narrows as it goes outward. Device. 6. Claims 1 to 5, characterized in that the outer corner 24 of the upper part of the packing is cut diagonally and has approximately the same depth as the bottom surface of the U-shaped groove 22 of the upper part of the packing. A hatch cover sealing device according to any one of paragraphs. 7 The angle α of the tip of the lower packing 20 is relatively large, while the angle β on both sides defining the shape of the upper packing 19 is much smaller, and the entire upper part 19 is substantially accommodated within the channel material 17. A hatch cover sealing device according to any one of claims 1 to 6, characterized in that: 8. Claims 1-7, characterized in that the seal 18 is made of a rubber compound containing sufficient butadiene to ensure a shore hardness of about 50-55. The hatch cover sealing device according to any one of the above.