JP4418638B2 - Security door, door frame and door frame unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crime prevention door, a door frame, and a door frame unit in which a crime prevention measure such as a thumb turn is taken as a door for a building.
[0002]
[Prior art]
The need for security measures for building doors has increased in recent years. In particular, a theft by a technique called picking is a problem. Picking is a criminal technique of unlocking a door using a wire-like unlocking tool called a pick. This method takes less time and does not destroy the lock, making it difficult for the victim to notice the crime. Since the disk cylinder lock is particularly vulnerable to picking, a type of lock using a dimple key with a changed cylinder is effective as a countermeasure against picking.
[0003]
There is also a technique called cam feed unlocking. Cam feed unlocking refers to a technique that uses a special tool to bypass the lock cylinder and work directly inside the lock case to activate the deadbolt and is also called “bypass unlocking”. Even for this trick, it is possible to replace the lock and make it a lock with measures such as attaching a cover to the back of the lock case so that special tools do not directly touch the dead bolt. improves.
[0004]
These tricks such as picking or cam feeding can be countered by changing the lock. However, a new technique called “samturn turn”, which cannot be countered even by doors that take measures against such techniques, has appeared and is rapidly expanding. This is a trick to drill a hole in the front door, insert a wire and open the key from the inside. The thumb turn is a key knob inside the door. To turn the thumb turn, first make a hole next to the knob of the metal door with a manual drill, etc., then insert a tool crafted at the tip by bending the wire to about 90 degrees and hook it on the thumb turn to turn the key. It is a method of canceling.
[0005]
[Problems to be solved by the invention]
As a countermeasure for turning the thumb turn, for example, a method has been proposed in which a thumb or the like is covered with a cap or the like so that the thumb turn is not covered with a wire. In particular, a method has been proposed in which PET bottles are cut and covered with double-sided tape. However, this method is very troublesome because it is necessary to set a cap or the like before locking. Furthermore, a technique for melting such a cap portion by a lighter or the like has also been reported, and the actual situation is that it cannot be an effective measure.
[0006]
On the other hand, as a method of making it difficult to unlock such crimes, for example, a method of making the door material extremely strong or using a lock as an electronic key can be considered. However, if the door is strengthened, the door becomes thicker and heavier, and the original usability as a door is deteriorated. Moreover, as long as the intruder uses a metal drill, it is not difficult to make a hole using a metal door. On the other hand, it takes a lot of cost to exchange for an electronic key. Further, when a mechanism for manually unlocking from the inside is provided, it is not a solution. When using an electronic key for unlocking from the inside, there is also a problem that locking at home is troublesome.
[0007]
Furthermore, the present situation is not limited to the thumb-turn turning technique, and the conventional technique in which a bar or the like is inserted into the gap between the door and the door frame to open the door has not been adequately taken.
[0008]
On the other hand, it has been reported that an intruder gives up unlocking when it takes 5 minutes or more to unlock the door. From this viewpoint, a robust door that requires 5 minutes or more for unlocking is required for security measures.
[0009]
The present invention has been made in view of such a demand. An object of the present invention is to provide a security door, a door frame, and a door frame unit that can effectively prevent theft such as thumb turn.
[0010]
[Means for Solving the Problems]
In order to solve the above-described object, a security door described in claim 1 of the present invention includes a door plate formed of a substantially flat metal plate, and opening and closing of the door plate when the door plate is attached to the door frame. A security door having a door lock mechanism for locking the door, wherein the door lock mechanism is a thumb turn that unlocks and locks by rotating a key knob provided inside the door plate. A concrete plate having a thickness of 20 mm or less made of an ultra-high-strength, high-toughness concrete material is fixed to the inner surface at least in the peripheral portion of the door lock mechanism . The ultra-high-strength, high-toughness concrete-based material is a cement mixed with fibrous or powdery plastic or metal, and an exposed hole is formed in at least a part of the metal plate. A part of the concrete plate fixed to the back surface of the metal plate is exposed through the hole .
[0011]
With this configuration, a door made of a composite material in which a metal plate and a concrete plate are combined can be configured, and a door with improved crime prevention that cannot be easily drilled only with a metal drill is realized. In addition, by using an ultra-high-strength, high-toughness concrete-based material for the concrete plate, the strength can be increased even if it is thinned, and the weight of the entire door can be reduced.
[0012]
The crime prevention door described in claim 2 is the crime prevention door described in claim 1, wherein the concrete plate is attached to the surface of the metal plate via a rubber adhesive as an adhesive. It is characterized by becoming.
[0013]
With this configuration, even when trying to pierce the door with a high-speed rotating body such as a drill, the rubber-based adhesive adheres to the surface of the drill blade and prevents cutting, making it difficult for the drilling to progress and improving crime prevention Is realized.
[0014]
Furthermore, the crime prevention door described in claim 3 is the crime prevention door described in claim 1 or 2, wherein a honeycomb structure is provided between the concrete plates.
[0015]
With this configuration, it is possible to prevent the door from becoming heavy while improving crime prevention.
[0016]
Furthermore, the crime prevention door described in claim 4 is the crime prevention door described in any one of claims 1 to 3, and is characterized by using two or more concrete plates .
[0017]
With this configuration, the design of the door is enhanced, and an intruder knows that a concrete board is used, and an effect of stopping the intrusion can be expected.
[0018]
Furthermore, the crime prevention door described in claim 5 is the crime prevention door described in any one of claims 2 to 4, wherein the concrete plate peels from the metal plate when a predetermined external force is applied. It is comprised so that it may carry out.
[0019]
With this configuration, when the intruder uses a drill or the like, the concrete plate is detached, making it difficult to perforate and improving crime prevention.
[0020]
A security door according to claim 6 is the security door according to any one of claims 1 to 5 , wherein at least a peripheral portion of the door lock mechanism is formed on the inner surface of the metal plate. The plate is fixed.
[0021]
With this configuration, even if the door is to be drilled with a high-speed rotating body such as a drill, aluminum powder adheres to the surface of the drill blade, preventing cutting and making drilling difficult, thus improving crime prevention. Is done.
[0022]
Furthermore, the crime prevention door described in claim 7 includes a door plate made of a substantially flat metal plate, and a door lock mechanism for locking the door plate when the door plate is attached to the door frame. A security door provided, wherein the door lock mechanism is a thumb turn for unlocking and locking by rotating a knob of a key provided inside the door plate , and at least the periphery of the door lock mechanism on the inner surface of the metal plate In the portion, an adhesive layer enclosing an adhesive material having paste-like viscosity is fixed.
[0023]
With this configuration, even when trying to pierce the door with a high-speed rotating body such as a drill, the adhesive layer adheres to the surface of the drill's blade and prevents cutting, making it difficult for the drilling to progress and improving crime prevention Is done.
[0024]
The door frame of the security door described in claim 8 is a door frame for mounting the security door, and the door frame includes a door frame side door lock mechanism for locking the opening and closing of the security door. The door lock mechanism is a thumb turn that unlocks and locks by rotating a key knob provided inside the door frame, and at least a peripheral portion of the door frame side door lock mechanism inside the door frame. In addition, a concrete block made of ultra-high strength and high toughness concrete material is inserted . The ultra-high-strength, high-toughness concrete-based material is a cement mixed with fibrous or powdery plastic or metal, and an exposed hole is formed in at least a part of the metal plate. A part of the concrete plate fixed to the back surface of the metal plate is exposed .
[0025]
With this configuration, it is possible to make it difficult to push open the door with a bar or the like.
[0026]
According to a ninth aspect of the present invention, a door frame unit includes a door plate made of a substantially flat metal plate, and a door lock mechanism for locking the door plate when the door plate is mounted on the door frame. A door frame unit comprising a security door and a door frame on which the security door is mounted, wherein the door lock mechanism is a thumb turn that unlocks and locks by rotating a key knob provided inside the door plate It is. The security door is formed by fixing a concrete plate having a thickness of 20 mm or less made of an ultra-high-strength, high-toughness concrete material at least in the peripheral portion of the door lock mechanism on the inner surface of the metal plate, Inside, a concrete block made of an ultra-high-strength, high-toughness concrete material is inserted at least in the peripheral portion of the door frame side door lock mechanism . The ultra-high-strength, high-toughness concrete-based material is cement mixed with fiber or powdery plastic or metal, and an exposed hole is formed in at least a part of the metal plate. A part of the concrete plate fixed to the back surface of the metal plate is exposed .
[0027]
With this configuration, a door made of a composite material in which a metal plate and a concrete plate are combined can be configured, and a door with improved crime prevention that cannot be easily drilled only with a metal drill is realized. In addition, by using an ultra-high-strength, high-toughness concrete-based material for the concrete plate, the strength can be increased even if it is thinned, and the weight of the entire door can be reduced. Furthermore, it is possible to make it difficult to push open the door with a bar or the like.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment shown below exemplifies a security door, a door frame and a door frame unit for embodying the technical idea of the present invention, and the present invention includes a security door, a door frame and a door frame unit. Not specified below. Further, in this specification, in order to facilitate understanding of the scope of claims, the numbers corresponding to the members shown in the embodiments are referred to as “claims column” and “means for solving the problems”. It is added to the members shown in the column. However, the members shown in the claims are not limited to the members in the embodiments. In addition, the size and positional relationship of members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, each element which comprises this invention is good also as an aspect which comprises several elements by the same member and combines several elements with one member.
[0029]
The crime prevention door of the present invention can be used as a door for a building and can be used for any purpose such as an indoor door, an outdoor door, or an entrance door, but is preferably used for a door facing an intruder entry route. To do.
[0030]
The outline | summary of the crime prevention door which concerns on one Example of this invention is shown in FIG. 1 and FIG. 1 is a front view of the door, and FIG. 2 is a longitudinal sectional view taken along the line II-II ′ of the door of FIG. As shown in this figure, in the security door, metal plates 1A and 1B are respectively fixed as surface materials on both sides of the door. Hereinafter, for convenience, the metal plate 1A is distinguished from the front side, that is, the side close to the outdoor, and the metal plate 1B is distinguished from the back side, that is, the side near the outdoor. However, it goes without saying that the same effect can be obtained even if both are interchanged.
[0031]
[Concrete board]
Concrete plates 2A and 2B are fixed to the back sides of the metal plates 1A and 1B via adhesives 5, respectively. The concrete plates 2A and 2B are made of an ultra high strength and high toughness concrete material. The ultra-high-strength and high-toughness concrete-based material is formed by curing cement mixed with plastic or metal in the form of fibers or powders. This concrete is characterized by higher strength than ordinary concrete and light weight per strength. Therefore, it can be formed in a thin plate shape to be lightweight and high in strength. In addition, since the cement state before curing is high in viscosity, it is molded into a sol form that is vibrated to enhance fluidity. As a result, it is possible to form a fine shape, and for example, it is possible to form a line or uneven pattern on the surface. In the present embodiment, DUCTAL (trademark) manufactured by Taiheiyo Cement Co., Ltd. was used as the cement.
[0032]
The thumb turn is performed by drilling with a metal drill or the like in the vicinity of the thumb turn of the door lock mechanism 3. For this reason, the concrete plates 2 </ b> A and 2 </ b> B are arranged at a position where an intruder can easily perforate, that is, in the vicinity of the door lock mechanism 3. By making the door a composite structure of a concrete plate and a metal plate, a metal drill can penetrate the metal plate, but it is difficult to penetrate the concrete plate. On the contrary, it is difficult to drill a metal plate with a concrete drill. In the present situation where both metal and concrete drill blades do not exist, if an intruder tries to drill a hole penetrating the composite door, it is necessary to replace the drill blade, which takes time and effort. According to the report, when it takes 5 minutes or more for unlocking, the intruder gives up the intrusion. With the above configuration, the time and effort required for unlocking can be taken and the effect of giving up the intrusion can be expected.
[0033]
The concrete plates 2A and 2B are arranged around the door lock mechanism 3 that locks the opening and closing of the door. By providing the concrete plates 2A and 2B at positions where they are easily perforated, it is possible to make the thumb turn difficult. Moreover, the concrete plates 2A and 2B can be provided so as to cover the entire surfaces of the metal plates 1A and 1B. In FIG. 2, one concrete plate 2A, 2B is fixed to each of the two metal plates 1A, 1B. However, a concrete plate is fixed to both surfaces of the metal plates 1A, 1B, or two concrete plates are used. The above may be laminated and fixed, or only one concrete plate may be fixed to any metal plate.
[0034]
Further, as shown in FIG. 3, one or more exposure holes 4 may be partially formed in the metal plates 1A and 1B for fixing the concrete plates 2A and 2B. The exposure hole 4 is preferably provided in the metal plate 1A on the outer surface side of the door. In this configuration, since a part of the concrete plate 1A fixed to the back surface of the metal plate 1A is exposed through the exposure hole 4, the ground surface of the concrete plate 1A appears on the part of the metal door from the surface of the door, and the door surface The door has a variety of textures and can be made a door with excellent design. Furthermore, since the door is informed that the door is a composite of metal and concrete, it can be expected that the intruder will abandon the intrusion by showing that the thumb turn is difficult. Also in this configuration, the concrete plate is not necessarily provided on the entire surface of the metal plate, and may be provided in the vicinity of the door lock mechanism 3 and the exposed portion of the exposure hole 4. With this configuration, the concrete plate can be arranged only in a necessary portion, the amount of the concrete plate used can be reduced, and the weight of the door can be reduced. Furthermore, the amount of metal plate used is reduced by the amount of the exposure holes 4 provided in the metal plate, which can contribute to weight reduction. Of course, you may provide the exposure hole 4 in both metal plate 1A, 1B. The number, size, and layout of the exposed holes 4 can be freely designed according to preference.
[0035]
[Adhesive 5]
The concrete plates 2A and 2B are fixed to the back side of the metal plates 1A and 1B with an adhesive 5. As the adhesive 5, a rubber-based adhesive can be preferably used. Because rubber-based adhesives are viscous, even if you try to pierce the door with a rotating body such as a drill, the viscous adhesive 5 gets tangled with the drill, the drill surface is covered with adhesive, and the sharpness is minimized. As a result, the progress of drilling becomes difficult. Therefore, by providing a viscous adhesive layer on the cross section of the door, it is possible to resist drilling such as a drill. For example, if a double-sided tape coated with an adhesive is used, the bonding work between the metal plates 1A and 1B and the concrete plates 2A and 2B becomes easy. Alternatively, an adhesive may be separately applied to the bonding surface.
[0036]
Moreover, the fixation strength of the concrete plates 2A and 2B fixed to the back surfaces of the metal plates 1A and 1B can be intentionally weakened. In particular, when the door is to be drilled with a drill or the like, it is preferable to adjust so that the concrete plates 2A and 2B are peeled off by the vibration and impact. By doing in this way, when an intruder tries to drill a through hole in a door and uses a drill, the concrete plates 2A and 2B can be detached inside the metal plates 1A and 1B. Since the concrete plate that has been unfixed moves freely, the concrete plate itself that is not fixed moves when trying to penetrate with a drill, and the drilling position is not determined. When drilling with a drill, it is necessary to fix the object to be drilled, and even if the drill is brought into contact with an object that is not fixed, the object is not stable, and is in a so-called “dancing” state, Drilling becomes extremely difficult. In particular, in the configuration using the two concrete plates 2A and 2B, the two concrete plates 2A and 2B come off inside the door, so that the state becomes extremely unstable and the penetration becomes even more difficult. Therefore, a countermeasure for turning the thumb is also realized by intentionally creating a fixed state in which the concrete plate is easily peeled off. In order to realize the above-mentioned fixed state, for example, a method of using an adhesive material 5 with weakened adhesive force or providing the adhesive material 5 only on a part without using the entire adhesive surface as a concrete plate can be used.
[0037]
[Adhesive layer]
Alternatively, instead of or in addition to the method of fixing the concrete plate with an adhesive, an adhesive layer in which a viscous adhesive is enclosed inside the door may be provided. For example, an adhesive layer in which a highly viscous liquid is stored in a bag-like container or a gel-like adhesive is applied in the form of a film is attached to the peripheral portion or the entire surface of the door lock mechanism 3 on the back side of the metal plates 1A and 1B. Provided. Even with this configuration, when drilling with a rotating body such as a drill as described above, the adhesive material adheres to the drill surface in a paste-like shape, and the sharp blade surface is covered with the adhesive material, resulting in a decrease in sharpness and the progress of drilling. It becomes difficult. In order to continue drilling, it is necessary to remove the glue-like adhesive material adhering to the surface of the drill one by one, which is very laborious. Therefore, even in this configuration, it is possible to prevent the thumb turn by making the perforation of the door extremely difficult. Moreover, since the structure which provides an adhesion layer is sufficient only to provide an adhesion layer on the inner surface of a door without using a concrete plate, it can be realized inexpensively and easily. Furthermore, even if the adhesive layer is not provided on the entire surface, the adhesive layer can be arranged at a lower cost by being disposed only in the peripheral portion of the door lock mechanism 3. Furthermore, even if it does not provide in both metal plate 1A, 1B, it provides in the back surface of the metal plate 1A of either one, Preferably the surface side of a door.
[0038]
[Aluminum plate]
Furthermore, instead of or in addition to the method of fixing the concrete plate with an adhesive or the configuration of providing an adhesive layer, an aluminum plate may be provided inside the door. When an aluminum plate is drilled, aluminum powder is generated. This aluminum powder also hinders continuation of drilling. This is because aluminum powder adheres to the surface of a rotating body such as a drill, and the sharpness of the blade surface is reduced. Therefore, in the same manner as described above, in order to continue drilling, it is necessary to remove the aluminum powder adhering to the blade of the drill, which is troublesome. Therefore, even with this method, it is possible to take care of unlocking the intruder, so it is possible to implement a countermeasure for turning the thumb. The aluminum plate does not need to be provided on the entire surface, and may be provided only in the vicinity of the door lock mechanism 3. Further, it goes without saying that the adhesive material for fixing aluminum may be adjusted to a strength that peels off by the vibration of the perforations as described above.
[0039]
[Honeycomb structure 6]
A honeycomb structure 6 is used for the door core. In the example of FIG. 2, a honeycomb core is provided as the honeycomb structure 6 between the concrete plates 2A and 2B. This honeycomb core is made of flame-retardant paper and is lightweight. In addition, the cross section has a honeycomb shape to increase the strength, and each honeycomb forms an air layer, so that soundproofing and heat insulating effects can be obtained. For this reason, a door can be made lightweight and strong. Since the honeycomb structure 6 is lightweight, for example, even if the honeycomb structure 6 is thickened to thicken the entire door, the weight of the door can be kept light. The thickness of the door is preferably 33 mm to 50 mm, more preferably 36 mm to 40 mm. In general, the strength increases as the concrete plate is thickened. Therefore, when a sufficient strength can be obtained, a member other than the ultra-high strength and high toughness concrete material can be used. On the other hand, since the weight increases as the concrete plate is thickened, the weight is set so as not to interfere with the purpose of use of the door.
[0040]
[Door lock mechanism 3]
Further, the door includes a door lock mechanism 3. Since the present invention has a feature in the door structure and not in the door lock mechanism 3, the door lock mechanism is not specified, and the door lock mechanism is currently developed or developed in the future. Can be used as appropriate. For example, a door lock mechanism shown in FIG. 4 can be used. 4A shows an exploded perspective view of a door lock mechanism fixed to the door, and FIG. 4B shows a cross-sectional view thereof. Preferably, a cylinder lock for which countermeasures against picking and cam feeding are to be used is used.
[0041]
The door according to this embodiment is preferably lightweight so that it can be easily handled, such as opening and closing. In this example, the material and thickness of each member are set so that the weight of the entire door is 60 kg or less. The thickness of each layer is, for example, 5 mm to 15 mm, preferably 6 mm to 10 mm, and most preferably 8 mm to 10 mm for the concrete plates 2A and 2B. Further, the metal plates 1A and 1B can be 0.5 mm to 4 mm, for example, 0.6, 0.8, 1.6, 2.3, and 3.2 mm.
[0042]
[Door frame 7]
Next, the door frame 7 to which the door according to the present embodiment is mounted is shown in FIG. The door frame 7 shown in this figure has a concrete block 8 inserted in a space inside a door frame body formed by bending the metal plates 1A and 1B. As the concrete block 8, the above-described ultra-high strength and high toughness concrete material can be used. The door frame 7 is preferably provided with strength by pouring mortar or the like into the internal space, but the door frame side door lock mechanism or the like for locking the opening and closing of the door is provided inside the door frame 7. In practice, mortar injection or the like becomes difficult. However, there is anxiety that a door frame without any reinforcement cannot sufficiently prevent an intruder from breaking the door lock. For example, when the door is locked, a bar or the like is pressed against the door lock mechanism at the gap between the door frame and the door, and the gap between the door frame and the door is opened by the lever principle. If the door frame is dented more than the length of the protruding dead bolt, the door will be broken.
[0043]
Therefore, in this embodiment, in order to reinforce the door frame at this portion, a strong concrete block 8 is disposed inside the door frame. The concrete block 8 has a thickness substantially equal to the thickness direction of the door frame 7 and is preferably disposed at a portion where the door lock mechanism 3 is located as shown in FIG. Moreover, you may arrange | position over the full length of the vertical direction of the door frame 7, or the perimeter. The concrete block 8 is formed in a shape that matches the shape inside the door frame in advance so that it can be stored in the door frame, and is slightly reduced in size so that it can be inserted. Also, the concrete block can be provided inside the door frame by a method in which concrete is poured into the door frame and placed.
[0044]
【The invention's effect】
As described above, the security door, door frame, and door frame unit of the present invention are provided with security measures, and can particularly resist intrusion caused by turning the thumb. This is because the present invention is composed of a composite material in which a metal plate door is combined with a concrete plate. Using a composite material that combines materials other than metal makes it difficult to drill with a metal drill, which simply opens a through hole in the door using a metal drill and unlocks in a very short time. You can avoid things. Furthermore, by providing a viscous adhesive or adhesive layer, these are further adhered to the surface of a drill or the like, making drilling difficult. Moreover, by combining an aluminum plate, aluminum powder can be similarly attached to the drill to prevent the progress of drilling. Furthermore, by lining the door frame with a concrete block, it is possible to resist intrusion by a bar or the like. Thus, according to the present invention, it is possible to realize a crime prevention door, a door frame, and a door frame unit that can be used with a high degree of crime prevention.
[Brief description of the drawings]
FIG. 1 is a front view of a security door according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a state in which the door shown in FIG. 1 is cut by a wavy line.
FIG. 3 is a front view of a security door according to another embodiment of the present invention.
FIG. 4 is an exploded perspective view and a sectional view showing an example of a door lock mechanism.
FIG. 5 is a horizontal sectional view showing a door frame of a security door according to an embodiment of the present invention.
FIG. 6 is a longitudinal sectional view showing a door frame of a security door according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 1A, 1B ... Metal plate 2A, 2B ... Concrete plate 3 ... Door lock mechanism 4 ... Exposed hole 5 ... Adhesive material 6 ... Honeycomb structure 7 ... Door frame 8 ... Concrete block

Claims (9)

A security door comprising a door plate composed of a substantially flat metal plate, and a door lock mechanism for locking the opening and closing of the door plate when the door plate is attached to the door frame,
The door lock mechanism is a thumb turn that unlocks and locks by rotating a key knob provided inside the door plate,
On the inner surface of the metal plate, at least in the peripheral part of the door lock mechanism, a concrete plate having a thickness of 20 mm or less made of an ultra-high strength high toughness concrete material is fixed ,
The ultra-high strength and high toughness concrete material is cement mixed with fibrous or powdery plastic or metal,
A security door , wherein an exposed hole is formed in at least a part of the metal plate, and a part of the concrete plate fixed to the back surface of the metal plate is exposed through the exposed hole of the metal plate .   The security door according to claim 1, wherein the concrete plate is attached to a surface of the metal plate via a rubber-based adhesive as an adhesive.   The security door according to claim 1, wherein a honeycomb structure is provided between the concrete plates.   The security door according to any one of claims 1 to 3, wherein two or more of the concrete plates are used. The security door according to any one of claims 2 to 4, wherein the adhesive is configured such that the concrete plate is separated from the metal plate when a predetermined external force is applied. A security door according to any one of claims 1 to 5 ,
A security door, wherein an aluminum plate is fixed to an inner surface of the metal plate at least in a peripheral portion of the door lock mechanism. A security door comprising a door plate composed of a substantially flat metal plate, and a door lock mechanism for locking the opening and closing of the door plate when the door plate is attached to the door frame,
The door lock mechanism is a thumb turn that unlocks and locks by rotating a key knob provided inside the door plate,
A crime prevention door characterized in that a glue-like adhesive layer enclosing a viscous adhesive material is fixed to the inner surface of the metal plate at least in the peripheral portion of the door lock mechanism. A door frame for mounting a security door,
The door frame includes a door frame side door lock mechanism for locking the opening and closing of the security door,
The door lock mechanism is a thumb turn that unlocks and locks by rotating a key knob provided inside the door frame,
In the inside of the door frame, a concrete block made of an ultra-high-strength high-toughness concrete material is inserted into at least the peripheral part of the door frame-side door lock mechanism ,
The ultra-high strength and high toughness concrete material is cement mixed with fibrous or powdery plastic or metal,
A door of a security door , wherein an exposed hole is formed in at least a part of the metal plate, and a part of the concrete plate fixed to the back surface of the metal plate is exposed through the exposed hole of the metal plate. frame. A door plate composed of a substantially flat metal plate, a security door provided with a door lock mechanism for locking the door plate when the door plate is mounted on the door frame, and a door frame for mounting the security door A door frame unit comprising:
The door lock mechanism is a thumb turn that unlocks and locks by rotating a key knob provided inside the door plate,
The security door is formed by fixing a concrete plate having a thickness of 20 mm or less made of an ultra-high-strength, high-toughness concrete material on the inner surface of the metal plate at least in the peripheral portion of the door lock mechanism,
The door frame has inserted therein a concrete block made of an ultra-high-strength, high-toughness concrete material at least in the peripheral portion of the door frame-side door lock mechanism ,
The ultra-high strength and high toughness concrete material is cement mixed with fibrous or powdery plastic or metal,
An exposed hole is formed in at least a part of the metal plate, and a part of the concrete plate fixed to the back surface of the metal plate is exposed through the exposed hole of the metal plate .

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