JPH047355Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a structure for improving the theft prevention properties of a wall constituting the main body and door of a safe. Note that the "wall" in this application is a concept that includes the top plate and bottom plate of the main body of the safe.

[Conventional technology]

Various ideas have been devised as means to improve the theft prevention properties of safes, and as one example, Japanese Utility Model Publication No. 43-5045 discloses a method for improving the theft prevention properties of safes. A large number of blocks made of a cone-resistant material are formed into a rectangular plate shape, and each block is arranged vertically and horizontally so that it is parallel to the inner and outer plates, and the front and back sides of each block are A block layer is formed by protruding hook-shaped feet and connecting the feet of adjacent blocks with reinforcing bars, and there is a gap between this block layer and the inner plate, and between the block layer and the outer plate. A structure in which a fireproof material such as concrete is filled between the face plate and the face plate is described.

[The problem that the idea attempts to solve]

However, in this conventional technology, the outer circumferential surfaces of adjacent blocks are simply in contact with each other, and the adjacent blocks are simply connected via reinforcing bars, so they are susceptible to attacks caused by heavy blows from hammers. Not only was it weak, but since drill attacks had to be defended only with blocks, there was a problem in that the defense performance against drill attacks was not sufficient.

The object of the present invention is to solve this problem and provide a safe with significantly improved anti-theft performance.

[Means to solve the problem]

In order to achieve this purpose, the wall body in the present invention has an inner plate and an outer plate arranged in parallel with appropriate distance, and a wall arranged between the inner plate and the outer plate substantially parallel to the inner plate and the outer plate. A large number of metal pipes are mounted on the wide surface of the substrate, and the axis of each pipe extends obliquely with respect to the wide surface of the substrate, and the outer circumferential surfaces of adjacent pipes are arranged on the wide surface of the substrate. The end surfaces of these pipes are arranged so that they are in contact with each other, and the end surfaces of these pipes are fixed to the substrate, and the spaces between the inner surface plate and the substrate and the outer surface plate and the substrate are filled with high-strength fireproof material such as concrete. It was designed to be filled with material.

[Functions and effects of the idea]

With this structure, a large number of pipes fixed to the substrate form a honeycomb structure, and the adjacent pipes and each pipe and the substrate mutually reinforce each other, increasing the rigidity of the entire pipe assembly and the substrate. The interior of each pipe is filled with refractory material, making it extremely difficult to deform, and the refractory material filled in each pipe is tightly bonded to the inner circumferential surface of the pipe. The combination of a wide area of contact with the substrate and an improvement in the adhesion strength of the refractory material to the pipe and the substrate significantly improves the protection function against hammer blows.

Further, since each pipe is filled with a fireproof material such as concrete, it is extremely difficult to melt and cut each pipe and the board with a burner.

Furthermore, to make a hole in the wall with a drill,
In addition to cutting several pipes along their axis and drilling holes in the substrate, it takes a huge amount of time to cut the pipes.
When cutting a pipe with a drill, the cutting edge of the drill becomes partially caught in the flesh of the pipe, making the drill extremely susceptible to breakage.

In addition, when cutting pipes with a drill, the drill is rotated and pressed against the pipe with its axis extending perpendicular to the wide surface of the board. Due to the inclination to the wide surface, the tip of the drill (i.e., the chisel edge) does not come into contact with the surface of the pipe, but the inclined cutting edge of the drill comes into contact with the surface of the pipe, which reduces the inclination of the drill. This causes the drill bit to slide on the surface of the pipe without biting into the pipe, making it increasingly difficult to cut the pipe.Furthermore, the tip of the drill slides along the surface of the pipe. As a result, a large bending force is applied to the drill due to the pressing force on the drill, making the drill more likely to break, thereby making it possible to more reliably prevent the wall from being destroyed by the drill.

Therefore, according to the present invention, in addition to having a high defense function against attacks by hammers and burners, by slanting the pipe with respect to the wide surface of the board, destruction by a drill can be more reliably prevented. This has the effect of significantly improving the theft prevention properties of the safe.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

In the figure, reference numeral 1 indicates a safe in which a door 4 is attached via a hinge 3 to the opening of a main body 2 with an open front surface, so that the door 4 can be opened and closed.
Each of the peripheral walls constituting the door 4 and the wall constituting the door 4 are constructed by disposing a core material 5 between an inner surface plate 9 and an outer surface plate 10 made of steel plate, etc. And in the space between the core material 5 and the outer surface plate 10, fireproof materials 8 and 1 are placed.
It has a three-layer structure filled with 2,8'.

The core material 5 includes a metal substrate 6 made of a difficult-to-cut material such as special steel, which is arranged approximately parallel to the inner surface plate 9 and the outer surface plate 10, and a metal substrate 6 made of a difficult-to-cut material such as special steel, and a rectangular cross-section arranged on both wide sides of the substrate 6. It consists of a group of a large number of metal pipes 7, 7', and each pipe 7, 7' has its axis inclined with respect to the wide surface of the substrate 6, and the outer peripheral surfaces of adjacent pipes 7 are in contact with each other. In such a state, the pipes 7 and 7' are lined up on each wide surface of the board 6, and the end surfaces of the pipes 7 and 7' are fixed to the board 6 by welding.

In this case, the axis of each pipe 7 fixed to one wide surface of the substrate 6 and the axis of the pipe 7 fixed to the other wide surface of the substrate 6 are shifted along the wide surface of the substrate 6. ing. Note that the adjacent pipes 7, 7' may be welded to each other at the free ends of the adjacent pipes 7, 7'.

The first filler is filled between the inner surface plate 9 and the core material 5.
The refractory material 8, the second refractory material 12 filled in the hollow part of each pipe 7, 7' in the core material 5, and the third refractory material 8' filled in the portion between each core material 5 and the outer surface plate 10. Each of these is made of reinforced concrete, and corundum lumps 11 having the same composition as the grinding wheel, grindstone-forming dresser, etc. are buried in the second refractory material 12 at an appropriate density to allow drilling with a drill. It retains the function of blocking the heat and the function of absorbing heat to deal with fusing.

In this case, the second refractory material 12 is fixed to the core material 5 in advance by pouring fresh concrete containing corundum lumps 11 into the pipes 7, 7', and then 5 is disposed between the inner surface plate 9 and the outer surface plate 10, and in this state, concrete is poured between the core material 5 and the inner surface plate 9 and between the core material 5 and the outer surface plate 10, and the first Refractory material 8 and 3rd
A refractory material 8' may also be formed.

In addition, when embedding the corundum lump 11 in the second refractory material 12, the second refractory material 12 is formed of aluminum (or its alloy) having the same volume and weight ratio as the corundum lump 1, and the corundum lump 11 is buried in the second refractory material 12. The second refractory material 12 may be cast into each pipe 7, 7' in advance by pouring molten aluminum containing aluminum into each pipe 7, 7'.

The corundum mass 11 may be buried in one or both of the first refractory material 8 and the third refractory material 8', or each of the refractory materials 8', 8, and 12 may be formed of only concrete. Needless to say, it's a good thing.

In the above configuration, in order to destroy the safe 1 and take out the items inside, it is necessary to make a hole 13 of a certain size in the wall, as shown by the dashed line in FIG. 4, for example. Generally speaking, cutting by melting with a burner, breaking with a hammer, and perforating with a drill are performed as means for emptying the hole.

Therefore, even if the outer plate 10 and the third refractory material 8' are destroyed, it is almost impossible for the core material 5 to be melted down because the second refractory material 12 is filled inside each pipe 7, 7'. It is possible.

Also, even if you hit it hard with a hammer, each pipe 7,
7' and each pipe 7, 7' and the base plate 6 have a honeycomb structure that reinforces each other, and each pipe 7, 7' is filled with the second refractory material 12, so that each pipe 7, 7' are in a state that is extremely difficult to deform, and the contact area of the second refractory material 12 with the pipes 7, 7' and the substrate 6 is large, so that the second refractory material 12 The rigidity of the core material 5 is greatly strengthened due to the combination of the fact that it is firmly fixed to the core material 5, and the core material 5 exhibits a high defense function against hammer attacks.

Furthermore, in order to make a hole 13 of a certain size by drilling with a drill, it is necessary to cut the flesh of each pipe 7 located at the periphery of the hole 13 along its axial direction, and to drill the hole in the substrate 6. However, not only does it take a lot of time to cut each pipe 7 in its axial direction, but the tip of the drill becomes partially caught on the pipe 7, making the drill extremely likely to break. Therefore, the defense function against drill attacks is also greatly improved.

In addition, when drilling holes with a drill, the drilling work is performed so that the axis of the drill is perpendicular to the wide surface of the board 6, but each pipe 7,
Since the axis of 7' is inclined with respect to the wide surface of the substrate, the chisel edge of the tip of the drill does not come into contact with the pipes 7, 7', and the inclined cutting edge of the drill does not touch the pipes 7, 7'. This causes the inclined cutting edge of the drill to slide on the surface of the pipes 7, 7' without biting into the pipes 7, 7', which increases the cutting of the pipes 7, 7'. Moreover, the tip of the drill is connected to pipe 7,
A phenomenon of sliding movement along the surface of 7' occurs,
Since a large bending force acts on the drill due to the pressing force on the drill, the drill becomes more likely to break, and therefore, the wall body can be more reliably prevented from being destroyed by the drill.

In the case where the pipes 7 and 7' are respectively fixed to both wide surfaces of the substrate 6 as in the embodiment,
When the axis of the pipe 7 located closer to the outer plate 10 and the axis of the pipe 7' located closer to the inner plate 9 are shifted along the wide surface of the substrate 6, the pipe 7' closer to the inner plate 9 is cut off. Since the entry position of the drill must be changed once, drilling with a drill becomes even more difficult.

In the above embodiment, the pipe was formed into a rectangular shape, but it goes without saying that the cross-sectional shape of the pipe can be freely selected, and it is also possible to use a plurality of types of pipes with different outer diameters. Further, the pipes may not be arranged vertically and horizontally, but may be arranged irregularly.

Furthermore, when a group of pipes is fixed to both wide surfaces of the substrate as in the embodiment, the outer diameter of the pipe fixed to one wide surface of the substrate and the outer diameter of the pipe fixed to the other wide surface of the substrate. By making these different from each other, the axial center of the pipe located closer to the outer surface plate and the axial center of the pipe located closer to the inner surface plate may be shifted from each other.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of the core material, FIG. 2 is a perspective view of the safe, FIG. - This is a perspective view. 1...Safe, 5...Core material, 6...Substrate, 7,
7'...Pipe, 8,8',12...Fireproof material.

Claims (1)

[Scope of utility model registration request] A wall that constitutes the main body or door of a safe, and this wall has an inner plate and an outer plate arranged in parallel with appropriate distance, and a wall between the inner plate and the outer plate. A large number of metal pipes are arranged on the wide surface of the substrate, and the axis of each pipe extends obliquely with respect to the wide surface of the substrate, and the pipes are arranged adjacent to each other. The pipes are arranged so that their outer circumferential surfaces are in contact with each other, and the end surfaces of these pipes are fixed to the substrate, and further, in the spaces between the inner surface plate and the substrate and between the outer surface plate and the substrate,
A wall structure in a safe characterized by being filled with a high-strength fireproof material such as concrete.