JP3016475U - Stone door - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a stone door 3 which is strong and has excellent durability and which can be manufactured at a cost equal to or lower than that of a metal or wooden door. [Structure] Two stone plates 3a and 3b formed in a plate shape
And a fiber sheet 2 which is a glass fiber woven fabric having high tensile strength, and has a sandwich structure in which the fiber sheet 2 is sandwiched between the stone plates 3a and 3b, and all of these members are integrated with an adhesive. It will be joined to. This stone door 3 has sufficient bending strength to withstand practical use because the fiber sheet 2 compensates for the weak points of the stone which is brittle against tensile stress.
Moreover, even if the stone plate 3a or 3b is broken, since it is attached to the fiber sheet 2, fragments will not scatter. Further, since the fiber sheet 2 is very thin as compared with the thickness of the stone plates 3a and 3b, even if it is visible in the forehead, it is hardly noticeable, so that it is not necessary to hide the fiber sheet 2 and the fiber sheet 2 is inexpensive. It is extremely low cost.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a stone door attached to an entrance of a building.

[0002]

[Prior art]

 In the past, most doors installed at the entrances and exits of buildings were made of metal or wood.

[0003]

[Problems to be solved by the device]

 As mentioned above, in the past, most of the doors were made of metal and wood, and stone doors were not yet in practical use. Even if natural stone is made into a door-sized panel and processed to a thickness of 30 mm to 60 mm, the panel-shaped stone is vulnerable to a bending load in the surface direction and may crack during use. In addition, there is a risk that the fragments will scatter, and it cannot be used as a door at all. On the other hand, as a building material made of stone, there is a building material in which an aluminum honeycomb material is sandwiched between two stone plates processed into a panel shape and bonded with an adhesive. However, first, the bending strength is not sufficient, and secondly, the honeycomb material has a thickness of 20 mm to 30 mm, which is unsightly because it is exposed at the edge (end face), and thirdly, the honeycomb material exposed at the edge is hidden. In order to do so, complicated processing steps are required, and the cost is very high due to the use of expensive honeycomb materials, which is too high compared to conventional metal and wooden doors, so price setting at a practical level is possible. There were problems such as difficulty and lack of feasibility. It is also possible to sandwich a metal plate between stone plates instead of the honeycomb material, but since the metal plate and the stone plate have large thermal expansion coefficients, the stone plate may warp due to thermal stress, or thermal stress may be repeatedly applied. Due to this, there was a fatal problem that the stone plate might crack.

The present invention has been made in view of the above problems, and an object thereof is tough and durable, and made of stone which can be manufactured at a cost equal to or lower than that of metal or wooden doors. To provide a door.

[0005]

[Means for Solving the Problems]

 To achieve the above object, the present invention is a combination of a plurality of slabs formed in a plate shape and a fiber sheet having a high tensile strength, and a sandwich in which a fiber sheet is sandwiched between the slabs. (EN) Provided is a stone door, which is formed by cutting a panel, which has a structure and is integrally joined with an adhesive agent, into a desired size and shape. The fiber sheet may be woven glass fiber or carbon fiber. Further, a window hole is formed so as to penetrate the stone plate and the fiber sheet, and an edge decoration member is fitted to the inner periphery of the window hole, and the glass plate or the synthetic resin plate is held by the edge decoration member. You can also choose to do so. Further, the edge decoration member is composed of at least two members of a front frame and a back frame, and has a coupling structure in which the front frame and the back frame are inserted from both sides of the window hole to clamp the peripheral edge of the window hole. It is preferable that the frame and the back frame are formed with a step portion that abuts the peripheral edge of the glass plate or the synthetic resin plate.

[0006]

[Action]

As shown in Figs. 4 (a) and 4 (b), test specimens 1A and 1B having a rectangular parallelepiped shape with a length of 9 mm, a width of 10 mm, and a length of 60 mm are prepared, and the test specimens 1A and 1B are placed between fulcrums as shown in Fig. 4 (c). It was supported at two fulcrums on both ends supporting beam at a distance of 30 mm, and a load W was applied to the center (* crosshead speed 2 mm / min) to test the bending strength. The test piece 1A in FIG. 4 (a) has a single structure of Ebikawa granite, and the test piece 1B in FIG. 4 (b) has a glass fiber cloth between 5 mm and 3 mm thick Ebikawa granite. It has a sandwich structure in which a fiber sheet 2 having a thickness of 1 mm and woven in the above is bonded with an adhesive. As a result of the bending test, the bending strength of the single-piece test piece 1A was 136 (Kgf / cm ² ), whereas the bending strength of the test piece 1B was 576 (Kgf / cm ² ). The test was conducted at the Gifu Prefectural Ceramics Experiment Station (3-11 Hoshigadai, Tajimi City, Gifu Prefecture).

In general, when a bending load W is applied to the support beams at both ends, a compressive stress acts on the concave side curved in a bow and a tensile stress acts on the opposite convex side with the neutral axis as a boundary. Since stones are brittle with respect to tensile stress, when tensile stress due to such bending is applied, they easily break like test piece 1A. However, in the case of the test piece 1B, since the fiber sheet 2 made of glass fiber having a large tensile strength was sandwiched between the stones and all the members were bonded with the adhesive, the fiber sheet 2 resists the tensile stress. It seems that the weakness of the stone was covered, and as a result, the overall bending strength was dramatically improved.

Thus, a stone door having a sandwich structure in which a fiber sheet having high tensile strength is sandwiched between a plurality of stone plates formed in a panel shape is a stone that is fragile against tensile stress as described above. Since the fiber sheet compensates for the weakness of, the bending strength is sufficient for practical use, and even if the stone plate is broken, the fragments will not scatter because it adheres to the fiber sheet. Also, since the fiber sheet is very thin compared to the thickness of the stone plate, it is almost inconspicuous even if it is visible in the fore edge, so no treatment is required to conceal it, and in combination with the low cost of the fiber sheet, it is extremely low cost. is there.

As the fiber sheet, glass fiber is most effective in terms of adhesion to stone and tensile strength. Carbon fiber is also more effective than glass fiber, although it is slightly inferior in adhesion to stones. If a glass fiber or carbon fiber is used as a woven fabric which is a combination of warp and weft, the tensile strength is exerted in both the longitudinal and transverse directions, and it is the best fiber sheet for covering the weak points of the stone plate.

Further, a window hole is bored so as to penetrate the stone plate and the fiber sheet, an edge decoration member is fitted to the inner periphery of the window hole, and a glass plate or a synthetic resin plate is held by the edge decoration member. By doing so, it is possible to provide a design stone door that takes daylight into consideration without providing the stone plate with a glass groove that is troublesome to process. Further, if the edging member is divided into two members, a front frame and a back frame, and a glass plate or the like is sandwiched between the two steps, the glass plate can be easily attached and replaced.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view showing the basic components of the stone door, FIG. 2 is a perspective view of the stone door, and FIG. 3 is an enlarged vertical cross-sectional view showing the essential parts of the stone door.

As shown in FIGS. 1 to 3, the stone door 3 is made of glass fiber and two stone plates 3 a and 3 b formed in a panel shape having a door size of 15 mm to 30 mm. The fiber sheet 2 having a thickness of about 1 mm is used as a basic constituent element, and the fiber sheet 2 is sandwiched between the stone plates 3a and 3b and bonded with an adhesive. As is well known, the stone itself has a property of being easily chipped, so that the edge of the stone door 3 is rounded and chamfered.

In the stone door 3, a square window hole 4 is formed by penetrating both the stone plates 3 a and 3 b and the fiber sheet 2, and a metal trimming member 5 is fitted to the inner periphery of the window hole 4. Have been combined. As shown in FIG. 3, the frame member 5 is composed of a frame-shaped front frame 5a and a frame-shaped back frame 5b. Both the front frame 5a and the back frame 5b are based on the L-shaped frame 6, and a bent piece 7 is formed on the outer periphery of the L-shaped frame 6 to be brought into contact with the surfaces of the stone plates 3a, 3b. Further, the front frame 5a and the back frame 5b are respectively formed with stepped portions 9 and 9 which face each other and sandwich the peripheral edge of the glass plate 8, and further, a connecting piece 10 extending to the front frame 5a is provided with a back frame. The screw 11 passed from 5b is screwed, so that the peripheral edge of the window hole 4 is clamped by the front frame 5a and the back frame 5b. Therefore, first, the front frame 5a is fitted into the window hole 4 from the stone plate 3a side, then the glass plate 8 is fitted from the stone plate 3b side, and then the back frame 5b is fitted, and the front frame 5a and the back frame 5b are fastened with screws 11. For example, the glass plate 8 can be attached to the window hole 4. Of course, the glass plate 8 can be replaced by attaching and detaching the screws 11 and the back frame 5b.

In addition, although not shown, the stone door 3 is provided with hinge fittings above and below one side edge, and a grip fitting near the center of the other side edge. In addition, it is recommended to install a door checker and close the door slowly to ensure safety.

Although the present invention has been described with reference to the embodiments, the present invention is of course not limited to the above embodiments. For example, although the stone plates 3a and 3b having the same thickness are used in the embodiment, one stone plate 3a may be thick and the other stone plate 3b may be thin like the test piece 1B. By doing this, it is possible to engrave a deeply carved pattern on the thick stone plate 3a. Further, in the embodiment, the stone door 3 is composed of the two stone boards 3a and 3b and the one fiber sheet 2, but the stone board and the fiber sheet may be combined in any number of layers. Furthermore, the size and shape of the window hole 4 are arbitrary as long as the strength of the stone door 3 is not impaired.

[0016]

[Effect of device]

 Since the stone door of the present invention has a sandwich structure in which a fiber sheet having a high tensile strength is sandwiched between a plurality of stone plates formed in a panel shape, the fiber sheet compensates the weak point of the stone which is brittle against tensile stress. It has sufficient strength to withstand practical use, and even if the stone plate is broken, it does not scatter because it is attached to the fiber sheet. Moreover, since the fiber sheet is much thinner than the thickness of the stone door, thermal stress is hardly applied to the slab, so there is no risk of warpage or cracks, and even if the fiber sheet looks like a small edge of the stone door. Since it is almost inconspicuous, the process for hiding is unnecessary. Furthermore, since fiber sheets are low cost and easy to process, stone doors can be provided at the same level as or lower than conventional metal and wooden doors. Needless to say, stone doors are not only heavier and more luxurious in appearance than metal and wooden doors, but are also excellent in sound insulation and durability. After the problem is completely cleared, it is expected to spread to general houses, stores, night safes, etc. If the stone door of the present invention is used as a night-time safe, it takes about 10 minutes to unlock with a burner in the case of a conventional metal door, whereas in the case of a stone door, It will take more than one hour to secure the time until the police arrive at the scene. Therefore, it has an excellent crime prevention effect.

As the fiber sheet to be used, glass fiber is the most effective in terms of adhesiveness to stone and tensile strength, and carbon fiber is slightly inferior to glass fiber in adhesiveness to stone. Is also highly effective. When glass fiber or carbon fiber is used as a woven fabric that is a combination of warp and weft, the tensile strength is exerted in both longitudinal and transverse directions, so the best results as a fiber sheet that covers the weak points of the slab are obtained. Can bring

Further, a window hole is formed so as to penetrate the stone plate and the fiber sheet, an edge decoration member is fitted to the inner periphery of the window hole, and the glass plate or the synthetic resin plate is held by the edge decoration member. By doing so, it is possible to form a window for daylighting without making a glass groove in the stone plate, which is troublesome to process. Furthermore, if the edging member is divided into two parts, a front frame and a back frame, and a glass plate or the like is sandwiched between the two steps, the glass plate can be easily attached and replaced. Exert the effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing main components of a stone door.

FIG. 2 is a perspective view of a stone door.

FIG. 3 is an enlarged vertical sectional view showing a main part of a stone door.

4A and 4B are perspective views showing a test piece,
(C) is a front view showing a bending strength test.

[Explanation of symbols]

 2 ... Fiber sheet 3 ... Stone door 3a, 3b ... Stone plate 4 ... Window hole 5 ... Edge decoration member 5a ... Front frame 5b ... Back frame 8 ... Glass plate 9 ... Step section

Claims (5)

[Scope of utility model registration request] 1. A combination of a plurality of stone plates formed in a plate shape and a fiber sheet having high tensile strength,
A stone door having a sandwich structure in which a fiber sheet is sandwiched between the stone plates, and all of these members are integrally joined with an adhesive. 2. The stone door according to claim 1, wherein the fiber sheet is a glass fiber woven fabric. 3. The stone door according to claim 1, wherein the fiber sheet is a carbon fiber woven fabric. 4. A window hole is formed so as to penetrate through the stone plate and the fiber sheet, and an edging member is fitted to the inner periphery of the window hole, and the edging member is a glass plate or a synthetic resin. A plate is held so as to hold it.
The stone door according to any one of 3 to 3. 5. The connecting structure, wherein the edge decoration member is composed of at least two members of a front frame and a back frame, and the front frame and the back frame are inserted from both sides of the window hole to clamp the peripheral edge of the window hole. The stone door according to claim 4, further comprising stepped portions which are formed on the front frame and the back frame and which contact the peripheral edge of the glass plate or the synthetic resin plate.