BURGLAR-PROOF SAFE WITH MULTI-LAYER STRUCTURE

Description

Technical area

[0001] The invention relates to the construction of a safe. It is a burglar-proof safe with a multi-layer structure.

[0002] Technological background The higher the security level, the greater the burglary resistance. Common attack tools include angle grinders, flame cutters, hammers, impact drills, and cutting torches. To fend off such attacks, one wall of the safe must be made relatively thicker. For current safes with security levels CEN III, CEN IV, and CEN V, the wall thickness is typically ≥ 40 mm.

[0003] DE 19 45 893 U discloses a multi-layer armor plate for valuables containers, such as safes. The armor plate comprises at least one metallic and one non-metallic layer and consists of a metal plate made of mild steel, a cast metal layer, a self-strengthening layer, and another metal plate made of mild steel. The cast metal layer is made, in particular, of aluminum and includes inclusions of refractory oxides and silicon carbide. The self-strengthening layer is advantageously made of concrete and can include inclusions of refractory oxides or silicon-based oxides. Facing surfaces of the self-strengthening layer and the cast metal layer can be profiled so that projections of the surfaces interlock.

[0004] A wall structure for a safety cabinet is known from CN 202 194 493 U. The wall comprises a steel plate and a wear plate. The wear plate consists of a carbide alloy and a substrate layer of corrosion-resistant steel. A nanocement layer containing steel fibers is arranged between the wear plate and the steel plate.

[0005] DE 35 33 555 A1 discloses the wall of a security container, in particular a safe or strongbox. The wall comprises an inner metal layer and an outer metal layer. Parallel ribs are welded between the inner and outer metal layers. Aluminum strips with embedded corundum are arranged in a space between the ribs and the outer and inner metal layers.

[0006] From CN 85 107 644 A, a safe with a wall comprising an inner plate and an outer plate is known. Furthermore, the wall consists of a core part made of a substrate and metal strips. The strips are arranged longitudinally and transversely, forming a grid. The strips are preferably welded together and welded to the substrate. A filler material is poured into cavities in the grid between the strips. An insulation layer is arranged between the core material and the inner plate, and between the core material and the outer plate. Inventive step

[0007] The present invention is based on the object of creating a burglar-proof safe with a multi-layer structure, which, due to its design, allows the wall thickness of the safes to be reduced to ≤40mm and can still achieve the burglar protection EN1143-ICENIII, CENIV, CENV.

[0008] The technical concept of this invention is: A burglar-proof safe with a multi-layer structure, including a body, characterized in that the body consists of the components outer sheet, wear plate, composite reinforcement layer and reinforcement plate in the order from the outside to the inside, and that the said outer sheet, wear plate, the composite reinforcement layer and the reinforcement plate are tightly connected to one another.

[0009] Preferably, the outer sheet is made of stainless steel or carbon steel with a thickness of 1-5 mm. The wear plate has a thickness of 10-15 mm. The reinforcement sheet is made of stainless steel or carbon steel with a thickness of 2-10 mm. The composite reinforcement layer is made of silicon carbide, silicon nitride, boron carbide, or aluminum oxide with a thickness of 5-10 mm.

[0010] Preferably, a facing layer of the wear plate is closely bonded to an inner surface of the outer plate, and a base material side of the wear plate is closely bonded to a surface of the composite reinforcing layer.

[0011] According to the invention, the composite reinforcement layer also consists of several interconnected small sections. Several posts are welded together between the wear plate and the reinforcement plate. These small sections are arranged in the shapes formed by the posts, thus forming an overall structure. The posts can be designed as ribbed steels.

[0012] It can further be provided that the wall of said body has a thickness of 25 mm. Said outer sheet has a thickness of 4 mm, said wear plate has a thickness of 13 mm, and said reinforcement plate has a thickness of 3 mm. Said silicon carbide layer consists of several small, interconnected pieces of silicon carbide, each measuring 50 x 50 x 5 mm.

[0013] It can further be provided that the wall of said body has a thickness of 25 mm. Said outer sheet has a thickness of 4 mm, said wear plate has a thickness of 13 mm, and said reinforcement plate has a thickness of 3 mm. Said silicon nitride layer consists of several small, interconnected pieces of silicon nitride, each measuring 50 x 50 x 5 mm.

[0014] It can further be provided that the wall of said body has a thickness of 25 mm. Said outer sheet has a thickness of 4 mm, said wear plate has a thickness of 13 mm, and said reinforcement plate has a thickness of 3 mm. Said boron carbide layer consists of several small, interconnected pieces of boron carbide, each measuring 50 x 50 x 5 mm.

[0015] It can further be provided that the wall of said body has a thickness of 30 mm. Said outer sheet has a thickness of 4 mm, said wear plate has a thickness of 13 mm, and said reinforcement plate has a thickness of 3 mm. Said aluminum oxide layer consists of several small, interconnected pieces of aluminum oxide, each measuring 50 x 50 x 10 mm. novelty

[0016] Compared to current technology, this multi-layer safe offers strong attack defense and high burglary resistance, allowing the wall thickness of safes with high security levels such as CEN III, CEN IV, and CEN V to be reduced to 20-30 mm. This allows it to be installed even in tight spaces. Furthermore, this multi-layer composite construction can also be used for reinforcement in specific areas of thick-walled safes. Notes on the drawings

[0017] Drawing 1 is a side section of the invention.

[0018] Drawing 2 is a vertical section of the invention.

[0019] Of which, 1. Outer sheet, 2. Wear plate, 3. Composite reinforcement layer, 4. Post, 5. Reinforcement plate. Description of the design

[0020] Below, the details of the invention will be discussed in more detail using exemplary embodiments and drawings.

[0021] As can be seen from Figure 1, this is a burglar-proof safe with a multi-layer structure, including the body. The body consists, from the outside to the inside, of the following components: outer sheet 1, wear plate 2, composite reinforcement layer 3, and reinforcement plate 5. The outer sheet 1, wear plate 2, composite reinforcement layer 3, and reinforcement plate 5 are tightly connected to one another.

[0022] The outer sheet, designated 1, is made of stainless steel or carbon steel with a thickness of 1-5 mm. The wear plate, designated 2, has a thickness of 10-15 mm. The reinforcement sheet, designated 5, is made of stainless steel or carbon steel with a thickness of 2-10 mm. The composite reinforcement layer, designated 3, is made of silicon carbide, silicon nitride, boron carbide, or aluminum oxide with a thickness of 5-10 mm.

[0023] The support layer of the wear plate 2 designated by 2 is closely bonded to the inner surface of the outer plate 1, and the base material side of the wear plate 2 is closely bonded to the surface of the composite reinforcement layer 3.

[0024] The composite reinforcement layer designated 3 consists of several small interconnected sections.

[0025] Furthermore, the composite reinforcement layer, designated 3, consists of several interconnected small sections. Between the wear plate, designated 2, and the reinforcement plate, designated 5, several posts 4, designated 4, are welded together. The posts 4 can be designed as ribbed steels. These sections are arranged in the shapes formed by the posts 4, thus forming an overall structure.

[0026] The composite reinforcement layer consists of silicon carbide, silicon nitride, boron carbide, or aluminum oxide. Materials such as silicon carbide, silicon nitride, boron carbide, and aluminum oxide are very brittle and can be easily penetrated during a break-in, for example, using a hammer or impact drill. However, they exhibit fire-retardant properties and can offer significant resistance to, for example, flame cutting machines and cutting torches. The wear plate can effectively fend off attacks with burglary tools such as hammers, impact drills, or grinding wheels.

[0027] Because the composite reinforcement layer is tightly bonded to the base material side of the wear plate, the wear plate's resistance makes it difficult to pry out and destroy the composite reinforcement layer in the event of an external break-in. At the same time, the composite reinforcement layer offers greater protection against the wear plate being cut through.

[0028] Through coordinated interaction, the overall burglary protection against an attack with burglary tools such as angle grinders, flame cutting machines, hammers, impact drills and cutting torches can be increased by five to eight times and the wall thickness of safes with high security levels can be reduced to 20-30 mm. Example 1

[0029] As can be seen from drawings 1-2, the wall of the body has a thickness of 25 mm. The outer sheet has a thickness of 4 mm, the wear plate has a thickness of 13 mm, and the reinforcement plate has a thickness of 3 mm. The silicon carbide layer consists of several small, interconnected pieces of silicon carbide, each measuring 50 x 50 x 5 mm.

[0030] The silicon carbide layer consists of several small, interconnected pieces of silicon carbide. Between the wear plate, designated 2, and the reinforcement plate, designated 5, several posts, designated 4, are welded together. These small pieces of silicon carbide are arranged in the molds formed by the posts, designated 4, thus forming an overall structure.

[0031] After testing, using the test method according to EN 1143-1:2012 (Safety containers - Requirements, classification and test method), the measured values ​​are as follows in Table 1. Table 1 Security level Burglary standard (112x112mm hole) Measured values Cutting grinder flame cutting machine Cutting torch CEN III 80 RU ≥ 190 RU ≥ 180 RU ≥ 180 RU CEN IV 120 RU ≥ 190 RU ≥ 180 RU ≥ 180 RU CEN V 180 RU ≥ 190 RU ≥ 180 RU ≥ 180 RU Example 2

[0032] The wall of the body is 25 mm thick. The outer sheet is 4 mm thick, the wear plate is 13 mm thick, and the reinforcement plate is 3 mm thick. The silicon nitride layer consists of several small, interconnected pieces of silicon nitride, each measuring 50 x 50 x 5 mm.

[0033] The silicon nitride layer consists of several small, interconnected pieces of silicon nitride. Between the wear plate, designated 2, and the reinforcement plate, designated 5, several posts, designated 4, are welded together. These small pieces of silicon nitride are arranged in the shapes formed by the posts, designated 4, thus forming an overall structure.

[0034] After testing, using the test method according to EN 1143-1:2012 (Safety containers - Requirements, classification and test method), the measured values ​​are as follows in Table 2. Table 2 Security level Burglary standard (112x112mm hole) Measured values Cutting grinder flame cutting machine Cutting torch CEN III 80 RU ≥ 190 RU ≥ 180 RU ≥ 180 RU CEN IV 120 RU ≥ 190 RU ≥ 180 RU ≥ 180 RU CEN V 180 RU ≥ 190 RU ≥ 180 RU ≥ 180 RU Example 3

[0035] The wall of the body is 25 mm thick. The outer sheet is 4 mm thick, the wear plate is 13 mm thick, and the reinforcement plate is 3 mm thick. The boron carbide layer consists of several small, interconnected pieces of boron carbide, each measuring 50 x 50 x 5 mm.

[0036] The aforementioned boron carbide layer consists of several small, interconnected pieces of boron carbide. Between the wear plate designated 2 and the reinforcement plate designated 5, several posts designated 4 are welded together. These small, interconnected pieces of boron carbide are arranged in the molds formed by the posts designated 4, thus forming an overall structure.

[0037] After testing, using the test method according to EN 1143-1:2012 (Safety containers - Requirements, classification and test method), the measured values ​​are as follows in Table 3. Table 3 Security level Burglary standard (112x112mm hole) Measured values Cutting grinder flame cutting machine Cutting torch CEN III 80 RU ≥ 190 RU ≥ 180 RU ≥ 180 RU CEN IV 120 RU ≥ 190 RU ≥ 180 RU ≥ 180 RU CEN V 180 RU ≥ 190 RU ≥ 180 RU ≥ 180 RU Example 4

[0038] The wall of the body is 25 mm thick. The outer sheet is 4 mm thick, the wear plate is 13 mm thick, and the reinforcement plate is 3 mm thick. The aluminum oxide layer consists of several small, interconnected pieces of aluminum oxide, each measuring 50 x 50 x 5 mm.

[0039] The aforementioned aluminum oxide layer consists of several small, interconnected pieces of aluminum oxide. Between the wear plate designated 2 and the reinforcement plate designated 5, several posts designated 4 are welded together. These small, aluminum oxide pieces are arranged in the molds formed by the posts designated 4, thus forming an overall structure.

[0040] After testing, using the test method according to EN 1143-1:2012 (Safety containers - Requirements, classification and test method), the measured values ​​are as follows in Table 4. Table 4 Security level Burglary standard (112x112mm hole) Measured values Cutting grinder flame cutting machine Cutting torch CEN III 80 RU ≥ 120 RU ≥ 120 RU ≥ 120 RU CEN IV 120 RU ≥ 120 RU ≥ 120 RU ≥ 120 RU

Claims

1. Burglar-proof safe with a multilayer structure, including body, the body consisting of the components outer plate (1), wear plate (2), composite reinforcing layer (3) and reinforcing plate (5), characterized in that said outer plate (1), wear plate (2), the composite reinforcing layer (3) and the reinforcing plate (5) are arranged in a sequence from the outside to the inside, and in that adjacent components are in each case tightly connected to one another, and in that said composite reinforcing layer (3) consists of a plurality of small sections bonded together and a plurality of posts (4) is welded together between the wear plate (2) and the reinforcing plate (5), and that said sections are arranged in the shapes formed by posts (4) and thereby form an overall structure.

2. Burglar-proof safe with a multilayer structure according to claim 1, characterized in that said outer plate (1) is made of stainless steel or carbon steel with a thickness of 1-5 mm, and that said wear plate (2) has a thickness of 10-15 mm, and that said reinforcing plate (5) is made of stainless steel or carbon steel in a thickness of 2-10 mm, and that the composite reinforcing layer (3) is made of silicon carbide, silicon nitride, boron carbide or aluminum oxide in a thickness of 5-10 mm.

3. Burglar-proof safe with a multi-layer structure according to claim 1, characterized in that the support layer of the wear plate (2) is closely bonded to the inner surface of the outer plate (1), and in that the base material side of the wear plate (2) is bonded to the surface of the composite reinforcing layer (3).

4. Burglar-proof safe with a multilayer structure according to claim 1, characterized in that the wall of said body has a thickness of 25 mm and said outer sheet (1) has a thickness of 4 mm, said wear plate (2) has a thickness of 13 mm, and said reinforcing plate (5) has a thickness of 3 mm, wherein the composite reinforcing layer (3) is a silicon carbide layer and consists of several small interconnected pieces of silicon carbide in the respective dimensions 50x50x5 mm.

5. Burglar-proof safe with a multilayer structure according to claim 1, characterized in that the wall of said body has a thickness of 25 mm and said outer plate (1) has a thickness of 4 mm, said wear plate (2) has a thickness of 13 mm, said reinforcing plate (5) has a thickness of 3 mm and the composite reinforcing layer (3) is a silicon nitride layer and consists of several small interconnected sections of silicon nitride in the respective dimensions 50x50x5 mm.

6. Burglar-proof safe with a multilayer structure according to claim 1, characterized in that the wall of said body has a thickness of 25 mm and said outer plate (1) has a thickness of 4 mm, said wear plate (2) has a thickness of 13 mm, said reinforcing plate (5) has a thickness of 3 mm and said boron carbide layer consists of several small interconnected sections of boron carbide in the respective dimensions 50x50x5 mm.

7. Burglar-proof safe with a multilayer structure according to claim 1, characterized in that the wall of said body has a thickness of 30 mm and said outer plate (1) has a thickness of 4 mm, said wear plate (2) has a thickness of 13 mm, said reinforcing plate (5) has a thickness of 3 mm, and said aluminum oxide layer consists of several small interconnected pieces of aluminum oxide in the respective dimensions 50x50x10 mm.