JPS6136712Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a so-called double fireproof storage, which is a fireproof storage such as a safe, in which an inner storage is further housed within the main body made of a fireproof insulation wall. This is related to the improvement of.

[Conventional technology]

The actual development of this type of double fireproof warehouse as a prior art
Publication No. 52-68289 discloses that an inner storage is arranged inside the main body with an appropriate gap, and the front peripheral edge of the inner storage and the inner peripheral edge on the back side of the opening of the main body are fixed with a frame-shaped support frame. On the other hand, a heat insulating packing is stretched over the entire front part of the support frame, and the gap between the inner peripheral surface of the opening of the main body and the peripheral edge of the outer door is sealed with the packing, thereby preventing the entry of fire. The technical idea behind this is disclosed.

[Problem that the invention attempts to solve]

However, in the case of the prior art, the so-called smoke return section, which is the gap between the opening of the main body and the peripheral edge of the outer door, is blocked with insulation packing, so the air in the gap between the main body and the inner compartment is There is a problem in that there is no place to escape even if it expands in the event of a fire, and therefore, the expansion pressure of the air destroys the weaker parts of the main body or the inner compartment, weakening the fireproof performance of the fireproof cabinet.

On the other hand, if no insulation packing is used between the main body and the outer door, the fire resistance that prevents flame from entering the main body exists between the main body opening and the outer door peripheral edge. It is proportional to the length of the cross section of the smoke return section. Therefore, it would be possible to increase the length of the cross section of the smoke return section, but this would require increasing the thickness of the main body and the outer door, resulting in the problem that the fireproof storage would become heavier than necessary. Regarding this point, Registered Utility Model No. 7648 discloses that by fitting an edge frame into the front opening of the safe body and forming a smoke return part on the inner peripheral surface of the edge frame, the smoke return In addition to making it possible to increase the length of the cross section of the section,
A configuration is disclosed in which a double door is pivotally attached to the inner circumferential surface of the edge frame so that it can be opened and closed freely, but fitting the edge frame to the main body in this way makes the structure extremely complicated, and There is also a problem in terms of theft prevention.

The present invention makes it possible to maintain fireproof performance in this type of double fireproof storage without increasing the weight more than necessary.

[Means for solving problems]

Therefore, in the present invention, all side walls of the main body except for the opening that is covered by the openable/closable outer door are filled with concrete, and the outer peripheral edge of the outer door is fitted into the inner peripheral edge of the opening in the main body. In a fireproof warehouse formed with a zigzag-shaped smoke return part that fits together, at least the left and right side walls of all the side walls of the main body are formed so that the thickness thereof becomes thinner on the back side than the smoke return part, A lightweight fireproof material such as rock wool is stretched on the inner surface of the thinned side wall, while an inner compartment is provided in the main body, and at least both left and right outer surfaces of the inner compartment are covered with aluminum foil. At the same time, a gap consisting of an air layer is formed between at least the left and right outer side surfaces of the inner storage and the lightweight fireproof material, and the front end of the gap is directed toward the smoke return section. It has an open configuration.

[Functions and effects of the invention]

With this structure, at least most of the left and right side walls of all the side walls of the main body are thinned, resulting in a double structure of the thinned concrete layer and the lightweight fireproofing material, so the specific gravity of the concrete and the lightweight fireproofing material is reduced. While the weight is certainly reduced by the difference between Since the inner surface of the thinned portion of all the side walls is covered with lightweight fireproof material,
By making the wall thinner, the fire resistance and heat insulation performance of the side wall does not deteriorate.

Aluminum foil was stretched on at least the left and right outer surfaces of the inner storage, and a gap was formed between the aluminum foil-strung surface and the lightweight fireproofing material, so steam from the concrete could be transferred to the lightweight fireproofing material. Even if it enters the gap through the inside, it is less likely to enter the inner compartment, and there is no heat conduction like when the inner compartment and lightweight fireproof material are in direct contact, and furthermore, there is no heat conduction from the main body side. The radiant heat is reflected by the aluminum foil,
This will prevent the temperature inside the inner chamber from rising for a long time.

Furthermore, since the opening of the gap formed between the lightweight fireproof material and the outer surface of the inner compartment faces the smoke return section, the steam evaporated from the concrete layer and the air expanded inside can be removed from the smoke from the gap. It blows through to the return part and prevents flame from entering from the return part.

Therefore, according to the present invention, although the side wall is made thinner, the length of the smoke return part can be increased, and the ingress of flame can be prevented by the convection generated in the gap between the inner chamber and the lightweight fireproof material. This has the effect of improving and maintaining fire resistance without increasing weight or reducing theft prevention performance.

〔Example〕

Next, an embodiment of the present invention will be described based on the drawings. In the drawings, reference numeral 1 indicates a main body of a fireproof storage with an opening on the front, and 2 indicates a horizontal rotation via three hinges at the opening of the main body 1. A freely pivoted single-opening type outer door is shown, and the outer surface of the main body 1 is covered with a steel plate 4.

All the side walls constituting the main body 1, that is, the left and right side walls 5, 5, the top wall 6, the back wall 7, the bottom wall 8, and the inside of the outer door 2 are hardened by adding a foaming agent such as aluminum powder to concrete and foaming it. It is formed of a fireproof concrete layer 9.

The inner peripheral edge of the opening in the main body 1, that is, the left and right side walls 5, 5, the top wall 6, and the bottom wall 8 of the main body 1
A smoke return part 10 having a zigzag cross section and fitting with the outer peripheral edge of the outer door 2 is formed on the end face part.
The thickness of the concrete layer 9 on the left and right side walls 5, 5 and the top wall 8 is determined so that the thickness of the concrete layer 9 in the vicinity of the smoke return part 10, which penetrates from the tip surface by a certain distance h, is t.
1, and the portion located further back than the vicinity of the smoke return portion 10 is formed to have a dimension t2 thinner than each of the smoke return portions 10. Furthermore, the back wall 7 also has the same wall thickness t as the back side of the left and right side walls 5 and the top wall 8.
2. It is formed into a thin wall. Although the bottom wall 8 is formed to have the same thickness as a whole, the bottom wall 8 may also be formed to have a thinner wall near the back.

A frame plate 12 having an L-shaped cross section is provided along each step 11 of the left and right side walls 5, 5 and the top wall 6, and the left and right side walls 5, the top wall 6, and the back wall 7 are located on the back side of the frame plate 12. A lightweight refractory material 13 such as rock wool is stretched to a thickness t3 on the inner surface.

Further, reference numeral 14 is an internal storage provided inside the main body 1,
Both the container 15 and the inner door 16 of the inner storage 14 have a double structure of an outer layer 17 and an inner layer 18. The outer layer 17 is made of hard polyisocyanate foam, and the inner layer 18 is made of, for example, aluminum sulfate. It is made of chemicals that absorb heat and prevent temperature rise due to changes in state, such as a mixture of tartaric acid and tartaric acid. Further, the opening between the inner door 16 and the container 15 is configured to be sealed with a gasket 19.

Then, aluminum foil 20 is pasted and stretched on at least both left and right outer surfaces of the outer surface of the container 15,
There is a width dimension t4 between the left and right outer surfaces on which the aluminum foil 20 is stretched and the left and right side walls 5, 5 of the main body 1.
A gap 21 consisting of an air layer is formed, and the gap 21
The front end thereof is configured to open into a smoke return section 10 that connects to the outer door 2. (See Figure 4). in this case,
A similar gap 21 may be provided between the outer surface of the top plate of the container 15 of the inner storage 14 and the inner surface of the top wall 6 on the main body side, or between the back plate of the container 15 and the back wall 7 of the main body 1, etc. .

In the above configuration, the opening of the main body 1 is connected to the outer door 2.
In the event of a fire in a closed state, the concrete layer 9 of the main body 1 will be heated first, and the crystal water and free water contained therein will turn into steam and be released into the main body 1. 5. In the top wall 6 and the back wall 7, this steam is once captured by 13 layers of lightweight fireproof material such as rock wool stretched on the inner surface of the main body 1, condenses, and this lightweight fireproof material 13 rises to a certain temperature or higher. As you do so, gradually move from here to main body 1.
Steam will be released inside. Therefore, as in the case where the side wall is formed of only a concrete layer,
Compared to when the steam is directly released into the main body 1, the temperature rise inside the main body 1 can be suppressed for a long time, and even if the thickness of the concrete layer 9 is made thinner, the fire resistance performance is the same or higher. is obtained, and the weight of the entire fireproof warehouse can be reduced by the difference in specific gravity between the concrete and the lightweight fireproof material 13.

On the other hand, the thickness dimension t1 of the smoke return portion 10 on the left and right side walls 5, 5, the top wall 6, the bottom wall 8, etc. is maintained at a thickness necessary for desired fire resistance, and the length of the smoke return portion 10 is There is no need to shorten the outer door 2.
It is possible to sufficiently prevent fire, heat, etc. from entering through the gap between the smoke return part 10 and the smoke return part 10, and the strength of the smoke return part 10 does not decrease, and the resistance to prying with a crowbar or the like does not decrease.

In addition, if the ground wall 8 of the main body 1 is similarly covered with a lightweight fireproof material 13, the fire resistance performance can be further improved and the weight reduced.

Since a gap 21 is provided between the lightweight fireproof material 13 lined in the main body 1 and the left and right outer surfaces of the container 15 of the inner compartment 14, on both the left and right outer surfaces,
Compared to the case where the lightweight refractory material 13 and the outer circumferential surface of the container 15 are in direct contact, heat conduction can be extremely reduced, and the front end opening of the gap 21 is directed toward the smoke return section 10 of the main body 1. Since it is open, a convection occurs in which the steam released from the lightweight fireproof material 13 such as rock wool into the gap 21 and the air expanded inside blows toward the smoke return section 10, and comes from the outside through the smoke return section 10. Since the flame can be blown back, a rise in temperature within the main body 1 can be prevented. In this case, it is effective to make the width t4 of the gap 21 as narrow as possible in order to increase the speed of the convection.

In addition, aluminum foil 20 is placed on the outer surface of the container 15 of the inner storage 14.
Since the aluminum foil 20 is stretched over the inside of the main body 1, the heat radiated from inside the main body 1 is blocked by the aluminum foil 20, and the temperature rise in the inner compartment 14 can be prevented for a long time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of a fireproof storage, Fig. 2 is a sectional view taken along the - line of Fig. 1,
FIG. 3 is a cross-sectional view taken along the - line in FIG. 1, and FIG. 4 is an enlarged cross-sectional view of the main part of FIG. 1... Main body, 2... Outer door, 5, 5... Left and right side walls, 6... Top wall, 7... Back wall, 8... Ground wall, 9... Concrete layer, 10... Smoke return section,
12...Frame board, 13...Lightweight fireproof material, 14...Inner storage, 15...Container, 16...Inner door, 20...Aluminum foil, 21...Gap.

Claims (1)

[Scope of utility model registration request] All side walls of the main body except for the openings covered by the openable/closable outer door are filled with concrete, and the inner peripheral edge of the opening in the main body is provided with a zigzag shape into which the outer peripheral edge of the outer door fits. In a fireproof warehouse formed with a smoke return part, at least the left and right side walls of all the side walls of the main body are formed so that the thickness thereof becomes thinner on the back side than the smoke return part, and the thinned side wall The inner surface of the main body is covered with a lightweight fireproof material such as rock wool, while an inner compartment is provided within the main body, and at least both left and right outer surfaces of the inner compartment are covered with aluminum foil. A gap consisting of an air layer is formed between at least the left and right outer surfaces of the outer surfaces of the inner storage and the lightweight fireproof material, and the front end of the gap is opened toward the smoke return part. Features a fireproof storage.