JPH0371556B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a fire prevention shutter that is provided to prevent the spread of fire and quickly extinguish the fire when a fire occurs in the hold of a car carrier or the like.

(Prior Art) Many so-called ro-ro ships used for transporting automobiles have a hold divided into several upper and lower layers by a middle deck provided inside the hull. Cars loaded with cargo are loaded into each of these holds by driving along the loading path between the ship and the quay, and unloading is also carried out by the car. Therefore, it is necessary to leave some fuel in the car's fuel tank after loading.
If a fire were to break out in the ship's hold, this fuel would ignite one after another, potentially causing a major disaster. To deal with such fire dangers, ro-ro ships are generally equipped with an automatic fire extinguishing system that sprays extinguishing agents such as carbon dioxide gas into the hold, and the hold is divided into multiple compartments with fire shutters to prevent the spread of fire. Efforts are being made to make fire extinguishing work more efficient.

These fire shutters need to be airtight so that the compartment where the fire occurs is completely isolated from other compartments, and for this purpose an elastic gasket is installed between the peripheral edge of the shutter door and the parts on the hull that are in contact with it. establish.

(Problems to be Solved by the Invention) By the way, even in such fireproof shutters, when the fire is so intense that carbon dioxide gas cannot extinguish it, the gasket may melt due to high heat, or the shutter door body may be thermally deformed. However, if this creates a gap between the door body and the hull side members, carbon dioxide gas used for extinguishing the fire may leak into other compartments, complicating fire extinguishing operations, or the toxic gas and smoke generated by the fire may leak into other compartments. The function of the fire shutters was significantly impaired, and there was a risk that the damage would spread.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fireproof shutter that can maintain sufficient airtightness even against high heat in order to solve the above-mentioned problems in fireproof shutters for ships.

(Means for Solving the Problems) The present invention comprises a door body made up of a plurality of panels connected by hinges in the vertical direction, rollers rotatably attached to both sides of these panels, and rollers that guide the rollers. The door body is moved upward by a guide rail set up from the floor of the ship's hold to open it, and in the closed state, it is opened by an elastic gasket provided between the peripheral edge of the door body and the opposing hull side member. In a fireproof shutter for a ship that maintains an airtight state, a second gasket made of a thermally expandable ceramic fiber sheet is provided in parallel with the gasket between the door body and the hull side member, and when the shutter is closed, Hooks that engage with the hull side members are fixedly installed at predetermined intervals on the upper end of the door body.

(Function) When high heat acts on the shutter, the seal of the ceramic fiber sheet thermally expands and blocks the gap between the door body and the hull side member, so even after the seal made of elastic material melts away due to the high heat, airtightness is maintained. At the same time, the hook engaged with the hull side member prevents thermal deformation of the door body.

(Example) Embodiments of the present invention are shown in FIGS. 1 to 4.

In Fig. 1, 1 is the door body of the shutter;
It is composed of a plurality of panels 3 connected vertically via hinges 2. On the other hand, a frame member 4 is fixedly provided as a hull-side member at a position facing the peripheral edge of the door body 1. The frame member 4 is made of L-shaped steel in a gate shape, and its outer circumferential portion is fixed to the surrounding wall surface, and the base end portion of an elastic gasket 5 is fixed along the inner circumferential surface that forms the opening. be done. The tip of the gasket 5 extends in a lip shape and comes into close contact with the upper edge and both side edges of the door body 1 to block the gap between the door body 1 and the frame member 4. A second gasket 6 is further fixed to the surface of the frame member 4 facing the door body 1 in parallel with the gasket 5 with a predetermined gap therebetween. This second packing 6 is made of a thermally expandable ceramic fiber sheet,
It is nonflammable and has the property of expanding and deforming to 3 to 4 times its thickness under high heat. Further, a gasket 8 is provided between the hold floor surface 7, which is also a hull side member, and the bottom of the door body 1. The gasket 8 is made of an elastic material molded into a bag-like cross section, and is attached along the bottom of the door body 1, and a second gasket 9 made of the same material as the second gasket 6 is housed inside the gasket 8.

Among the panels 3 constituting the door body 1, the uppermost panel 3A is fixedly provided with arms 10 projecting rearward on both sides thereof, and rollers 11 are rotatably attached to these arms 10. Also, among the hinges 2 that connect the panels 3, the door body 1 as shown in FIG.
Freely rotatable rollers 11 are also attached to the hinges 2 located on both sides. Two guide rails 12 for guiding these rollers are erected on the floor surface 7 behind the door body 1. Guide rail 1
2 rises from the floor surface 7 parallel to the door body 1, curves near the uppermost panel 3A, and then extends substantially horizontally toward the rear. Further, a horizontal shaft 13 as shown in FIG. 3 is provided above the door body 1, and a torsional spring 14 is installed therein, and wire drums 15 are attached to both ends of the shaft 13 and extend downward. A wire (not shown) is connected to the lower end of the door body 1 and transmits the rotational force of the torsional spring 14 to the door body 1.

Hooks 16 as shown in FIG. 4 are fixed to the uppermost panel 3A of the door body 1 at equal intervals in the lateral direction, and notches 17 are formed in the frame member 4 at corresponding positions. The hook 16 has a hook-shaped tip protruding in front of the panel 3A, and this tip engages with the notch 17 when the door body 1 is closed.

Next, the action will be explained.

To open the shutter from the state shown in Figure 1, open the door body 1.
By lifting the lower end or an appropriate part by hand, the door body 1 assisted by the torsional spring 14 is smoothly pulled up while rolling the roller 11 along the guide rail 12, and each panel 3 is removed from the hinge 2. It passes through the curved part of the guide rail 12 while being bent and is stored substantially horizontally at the rear. Since loading and unloading of the automobile is carried out in this state, the door body 1 does not interfere with the running of the automobile. In addition, when the shutter is closed, if the front end of the stored door body 1 is pulled toward you, the weight of the door body 1 exceeds the pulling force of the torsional spring 14, so that the shutter can be easily dropped between the frame member 4 and the guide rail 12. be included. At the same time as the shutter closes, the gasket 5 and the gasket 8 come into close contact with the peripheral edge of the door body 1 and the floor surface 7 while being elastically deformed, respectively. Note that since a predetermined gap is provided between the second gasket 6 and the door body 1, the second gasket 6 does not interfere with the opening and closing of the door body 1.

Incidentally, the shutters are kept closed during navigation, but if a fire breaks out in the hold in this state, high heat will also act on the door body 1 that defines the compartment. At this time,
Carbon dioxide gas for extinguishing fires is injected into the compartment from an automatic fire extinguishing system installed on board the ship, but if the fire is extinguished too late, there is a risk that the elastic gaskets 5 and 8 will melt due to the high heat. However, under such high heat, the second gaskets 6 and 9 expand and close the gap between the door body 1, the frame member 4, and the floor surface 7, so the door body 1 does not function properly even after the gaskets 5 and 8 are melted away. Maintain airtightness. In addition, since the upper end of the door body 1 is locked to the frame member 4 by the hook 16, thermal deformation of the door body 1 causes the panel 3A and the frame member 4 to
There is no fear that there will be a gap between them. Therefore,
The shutter remains airtight even under high heat,
Firefighting operations are carried out efficiently because the ejected carbon dioxide gas is not allowed to escape and air is blocked from flowing into the compartment from outside. Additionally, there is no risk of toxic gas or smoke generated by a fire leaking outside.

(Effects of the Invention) As described above, the fireproof shutter for a ship according to the present invention includes, in addition to the packing made of an elastic material, the second packing made of a thermally expandable fiberglass sheet, and the upper end of the door body is connected to the hull side member. Because it is equipped with a hook that stops the shutter, if a fire occurs and the shutter is exposed to high enough heat that the elastic gasket melts away, the secondary
The gasket thermally expands to close the gap between the door body and the hull side member, and the hook engaged with the hull side member prevents thermal deformation of the door body. Therefore, airtightness is maintained even under high heat, preventing leakage of extinguishing carbon dioxide gas and blocking air inflow from the outside, which has the effect of improving fire extinguishing ability.
It also has the effect of preventing toxic gas and smoke generated by a fire from leaking to other areas.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of a fire protection shutter showing an embodiment of the present invention, Fig. 2 is a horizontal sectional view of the same, and Fig. 3 is a horizontal sectional view.
This figure is also a rear view, and FIG. 4 is an enlarged rear view of the hook in the same embodiment. 1... Door body, 2... Hinge, 3, 3A... Panel, 4... Frame member, 5, 8... Packing, 6, 9
...Second packing, 7...Floor surface, 11...Roller, 12...Guide rail, 16...Hook.

Claims (1)

[Claims] 1 The door body consists of multiple panels connected by hinges in the vertical direction, and the door body is constructed by rollers rotatably attached to both sides of these panels and guide rails set up from the floor of the hold to guide the rollers. In a fireproof shutter for a ship, the door is moved upward to open the door, and when the door is closed, an airtight state is maintained by an elastic gasket provided between the peripheral edge of the door body and the opposing hull side member. A second gasket made of a thermally expandable ceramic fiber sheet is provided between the door body and the hull side member parallel to the gasket, and a hook that engages with the hull side member during closing is provided at the upper end of the door body. A fireproof shutter for a ship, characterized in that it is fixedly installed at a predetermined interval.