GB2534942A

GB2534942A - GRP Door having enhanced fire protecting performance

Info

Publication number: GB2534942A
Application number: GB1507090.7A
Authority: GB
Inventors: Sik Kwak Hyun
Original assignee: DOORCO KOREA CO Ltd
Current assignee: DOORCO KOREA CO Ltd
Priority date: 2014-12-30
Filing date: 2015-04-27
Publication date: 2016-08-10
Also published as: KR20160080639A; GB201507090D0

Abstract

Glass-fibre reinforced plastic (GRP) door having a frame that has a vertically long rectangular shape; plate-shaped Glassfiber Reinforced Plastic skins 200 attached to the front and rear sides of the frame; phenolic foam 300 disposed in internal space defined by the frame and skins; and vertically elongated reinforcing members 400 in the internal space, made of cellulose fibre reinforced cement (CRC), and increasing bending strength of the frame and the interior material. The frame may have include first and second horizontal frames 110, 120 and first and second vertical frames 130, 140 and the reinforcing members may be on the inner sides of the vertical frames. The reinforcing members may be arranged in parallel or may be at angles between 70° and 80° to a first horizontal frame. The horizontal frames may have a plurality of grooves (111, 121, Fig. 3) to receive ends of the reinforcing members. There may be L-shaped reinforcing members (410, Fig. 4) at the inner corners of the frame.

Description

Intellectual Property Office Application No. GII1507090.7 RTM Date:29 September 2015 The following terms are registered trade marks and should be read as such wherever they occur in this document: Kevlar (Page 7) Intellectual Property Office is an operating name of the Patent Office www.gov.uk /ipo

GRP DOOR HAVING ENHANCED FIRE PROTECTING PERFORMANCE

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the priority of Korean Patent 5 Application No. 10-2014-0193246 filed on December 30, 2014, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

Field of the Invention

[0002] The present disclosure relates to a glassfiber reinforced plastic (GRP) door having an enhanced fire protecting performance, and more particularly, to a GRP door having an enhanced fire protecting performance which can prevent a door from bending due to a pressure difference between both sides of the door in a fire.

Description of the Related Art

[0003] This section provides background information related to the present disclosure which is not necessarily prior art. [0004] In general, fire doors are installed and used at doorways of buildings to prevent spread of flames and combustion at a place with a fire.

[0005] Those fire doors are usually made of fireproofing materials for desired fire prevention performance and have various strengths, and incombustibility and fire prevention against a fire, depending on the materials, so various types of fire doors have been manufactured in accordance with user's demands.

[0006] Recently, various types of fire doors that are made of various materials, are easily installed on a doorframe, and can prevent flame and smoke from leaking between the doorframe and the fire doors at a place with a fire have been proposed. [0007] For example, wooden fire doors with high fire resistance have been proposed in Patent Documents 1 and 2.

[0008] However, those fire doors are usually heavy to improve 5 0 fire resistance, so it is difficult to manufacture the fire doors using light and high-strength materials.

[0009] Accordingly, GRP (Glassfiber Reinforced Plastic) doors that have the essential functions of doors and can maintain appropriate fire resistance, using GRP having excellent flame 10 resistance have been proposed in recent years.

[0010] However, when a fire occurs at a place with a GRP door with GRP thereon, a pressure difference is generated between both sides of the door due to frame spreading to the door and the door bends due to the pressure difference in some cases, so air passes through between the GRP door and the doorframe, and accordingly, flame or smoke may pass through between the GRP door and the doorframe.

[Documents of Related Art] [Patent Document] (Patent Document 1) (1) Korean Patent No. 10-0797761 (January 17, 2008) (Patent Document 2) (2) Korean Patent No. 10-0777422 (November 12, 2007)

SUMMARY OF THE INVENTION

[0011] An aspect of the present disclosure provides a GRP (Glassfiber Reinforced Plastic) door having an enhanced fire protection performance which can prevent a door from bending due to a pressure difference between both sides of a door and prevent a space from being formed at the place where the door and a doorframe are installed, in a fire.

[0012] This section provides a general summary of the disclosure and is not a comprehensive disclosure of its full scope or all of its features.

[0013] According to an aspect of the present disclosure, there 0 is provided a GRP door having an enhanced fire protecting performance which includes: a frame that has a vertically long rectangular shape; GRP (Glassfiber Reinforced Plastic) skins that are attached to the front and rear sides of the frame and made of plate-shaped GRP; an interior material that is disposed in an internal space defined by the frame and the GRP skins and made of phenolic foam; and reinforcing members that are vertically elongated in the internal space, made of CRC (Cellulose fiber Reinforced Cement), and increasing bending strength of the frame and the interior material.

[0014] In the GRP door having an enhanced fire protecting performance according to an aspect of the present disclosure, the frame may include: first and second horizontal frames transversely arranged at an upper end a lower end; and first and second vertical frames arranged longitudinally and connecting the left and right ends of the first and second horizontal frames, in which the reinforcing members may be disposed on sides, which face the internal space, of the first and second vertical frames.

[0015] In the GRP door having an enhanced fire protecting performance according to an aspect of the present disclosure, the reinforcing members may be lumbers that are larger in size in the thickness direction than the width direction of the internal space.

[0016] In the GRP door having an enhanced fire protecting performance according to an aspect of the present disclosure, the reinforcing members may be a plurality of lumbers arranged in the transverse direction of the internal space.

[0017] In the GRP door having an enhanced fire protecting performance according to an aspect of the present disclosure, the reinforcing members maybe arranged at acute angles between and 80° with respect to the first horizontal frame, inside 5 the internal space.

[0018] In the GRP door having an enhanced fire protecting performance according to an aspect of the present disclosure, the first and second horizontal frames respectively may have a plurality of first and second grooves corresponding to each other, and both ends of the reinforcing members may be inserted in the first grooves and the second grooves.

[0019] In the GRP door having an enhanced fire protecting performance according to an aspect of the present disclosure, L-shaped reinforcing members may be disposed insides corners at joints of the first and second horizontal frames and the first and second vertical frames.

[0020] In the GRP door having an enhanced fire protecting performance according to an aspect of the present disclosure, the reinforcing members may include: a first tilting-reinforcing member that is inclined with a first end at the corner at the joint of the first horizontal frame and the first vertical frame and a second end on first side of the second horizontal frame; a second tilting-reinforcing member that is inclined with a first end in close contact with the second end of the first reinforcing member on the first side of the second horizontal frame, and a second end on a first side of the first horizontal frame; a third tilting-reinforcing member that is inclined with a first end in close contact with the second end of the second reinforcing member on a first side of the first horizontal frame, and a second end on the first side of the second horizontal frame; and a fourth tilting-reinforcing member that is inclined with a first end in close contact with the second end of the third reinforcing member on the first side of the second horizontal frame, and a second end at the corner at the joint of the first horizontal frame and the second horizontal frame.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other aspects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in 10 conjunction with the accompanying drawings, in which: [0022] FIG. 1 is an exploded view illustrating a first embodiment of a GRP (Glassfiber Reinforced Plastic) door having an enhanced fire protecting performance according to the present disclosure; [0023] FIG. 2 is a view illustrating main parts of a second embodiment of a GRP (Glassfiber Reinforced Plastic) door having an enhanced fire protecting performance according to the

present disclosure;

[0024] FIG. 3 is a view illustrating an example modified from FIG. 2; [0025] FIG. 4 is a view illustrating main parts of a third embodiment of a GRP (Glassfiber Reinforced Plastic) door having an enhanced fire protecting performance according to the present disclosure; and [0026] FIG. 5 is a view illustrating main parts of a fourth embodiment of a GRP (Glassfiber Reinforced Plastic) door having an enhanced fire protecting performance according to the present disclosure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0027] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0028] The present disclosure will now be described in detail with reference to the accompanying drawing(s).

[0029] However, limitative embodiments will be described hereafter for clarity of the present invention, but it should be understood that the present invention is not thereto and modifications from the spirit of the present invention described in claims by those skilled in the art are included in the present invention.

[0030] Further, terminologies used herein and in claims have been selected by the inventor(s) for the convenience of description and the meanings are not limited to the meanings in dictionaries and should be appropriately interpreted in accordance with the spirit of the present invention.

[0031] FIG. 1 is an exploded view illustrating a first embodiment of a GRP ( Glas s fiber Reinforced Plastic) door having an enhanced fire protecting performance according to the present disclosure.

[0032] Referring to FIG. 1, a GRP door having an enhanced fire 20 protecting performance according to an embodiment includes a frame 100, GRP skins 200, an interior material 300, and a reinforcing member 400.

[0033] The frame 100 has a vertically long rectangular shape. [0034] The frame 100 is composed of a plurality of straight 25 bars coupled to each other.

[0035] The frame includes first and second horizontal frames 110 and 120 arranged transversely and first and second vertical frames 130 and 140 arranged longitudinally and the interior material 300 is disposed in the space surrounded by the first and second horizontal frames 110 and 120 and the first and second vertical frames 130 and 140.

[0036] In the frame 100, the first horizontal frame 110, the second horizontal frame 120, the first vertical frame 130, and the second vertical frame 140 may be integrally formed or may be separately formed and then coupled to each other.

[0037] The frame 100 may be made of LVL (Laminated Veneer 5 Lumber).

[0038] Further, metal having high strength, plastic, or wood are available.

[0039] A member 310 made of PVC may be attached to the left and right sides of the frame 100, that is, to the outer sides 10 of the first vertical frame 130 and the second vertical frame 140 to prevent wear of the frame 100.

[0040] The GRP skins 200 are attached to the front and rear sides of the frame 100 and finish the sides.

[0041] The GRP skins 200 are made of plate-shaped glass fiber reinforced plastic (GRP).

[0042] The GRP is a mixture of aromatic nylon fiber, such as glass fiber, carbon fiber, and Kevlar, with thermoplastic resin such as unsaturated polyester and epoxy resin, so it is stronger than iron, lighter than aluminum, and easy to manufacture.

[0043] Accordingly, attaching the GRP skins 200 to a door can increase strength and durability.

[0044] The GRP skins 200 are attached to the frame 100 usually by an adhesive.

[0045] The GRP skins 200 may have a plate shape with a thickness of 2 to 4 mm.

[0046] The surfaces 202 of the GRP skins 200 may be grained or patterned, or painted.

[0047] The interior material 300 is disposed in an internal space 250 defined by the frame 100 and the GRP skins 200.

[0048] The interior material 300 is made of a fire retardant and nonflammable material.

[0049] The interior material 300 is made of phenolic foam and inserted in the internal space 250. It may be foamed in the internal space.

[0050] The reinforcing member 400 is elongated vertically in the internal space 250.

[0051] Accordingly, it prevents the frame 100 and the internal material 300 from bending forward or backward from the door. That is, it increases bending strength of the frame 100 and the interior material 300.

[0052] The reinforcing member 400 is made of CRC (Cellulose 10 fiber Reinforced Cement).

[0053] The reinforcing member 400 is disposed on the sides, which face the internal space 250, of the first and second vertical frames 130 and 140. That is, the reinforcing member 400 is attached directly to the first and second frames 130 and 140, so the effect of increasing the strength of the frame 100 can be maximized.

[0054] The reinforcing member 400 may be further disposed on the side, which faces the internal space 250, of the first horizontal frame 110 or the second horizontal frame 120.

[0055] The reinforcing member 400 maybe a lumber that is larger in size in the thickness direction than the width direction of the internal space 250 and it is advantageous in preventing the door from bending forward/backward.

[0056] The reinforcing member 400 is a board made of CRC (Cellulose fiber Reinforced Cement).

[0057] The CRC (Cellulose fiber Reinforced Cement Board), which is manufactured by mixing Portland cement, silicon, and cellulose fiber with water and the pressing the mixture, has excellent water resistance and incombustibility.

[0058] Further, by the function of a high-density produce that is a feature of the CRC, a high sound-blocking effect can be achieved, so the essential functions of a door can be further improved.

[0059] FIG. 2 is a view illustrating main parts of a second embodiment of a GRP (Glassfiber Reinforced Plastic) door having an enhanced fire protecting performance according to the 0 present disclosure and FIG. 3 is a view illustrating an example modified from FIG. 2.

[0060] Referring to FIG. 2, a plurality of reinforcing members 400 is arranged transversely in parallel in the internal space 250, as in FIG. 2.

[0061] Referring to FIG. 3, in a frame 100 of the GRP door having an enhanced fire protecting performance according to the present embodiment, a plurality of first grooves 111 is formed on a first horizontal frame 110 and a plurality of second grooves 121 corresponding to the first grooves 111 is formed on a second horizontal frame 120.

[0062] Accordingly, the reinforcing members 400 can be firmly coupled to the frame 100.

[0063] FIG. 4 is a view illustrating main parts of a third embodiment of a GRP (Glassfiber Reinforced Plastic) door having 20 an enhanced fire protecting performance according to the present disclosure.

[0064] Referring to FIG. 4, in the GRP (Glassfiber Reinforced Plastic) door having an enhanced fire protecting performance according to the present embodiment, L-shaped reinforcing members 410 are disposed inside the corners at the joints of first and second horizontal frames 110 and 120 and first and second vertical frames 130 and 140.

[0065] The effect of preventing a door from bending can be improved by the reinforcing members.

[0066] FIG. 5 is a view illustrating main parts of a fourth embodiment of a GRP (Glassfiber Reinforced Plastic) door having an enhanced fire protecting performance according to the

present disclosure.

[0067] Referring to FIG. 5, in the present embodiment, reinforcing members 400 are arranged at acute angles between and 80° with respect to a first horizontal frame 110, inside 5 an internal space 250.

[0068] In detail, the reinforcing members 400 are composed of first, second, third, and fourth tilting-reinforcing members 411, 412, 413, and 414.

[0069] The first tilting-reinforcing member 411 is inclined with a first end at the corner at the joint of the first horizontal frame 110 and the first vertical frame 130 and a second end on first side of the second horizontal frame 120. [0070] The second tilting-reinforcing member 412 is inclined with a first end in close contact with the second end of the first reinforcing member 411 on the first side of the second horizontal frame 120, and a second end on a first side of the first horizontal frame 110.

[0071] The third tilting-reinforcing member 412 is inclined with a first end in close contact with the second end of the second reinforcing member 412 on a first side of the first horizontal frame 110, and a second end on the first side of the second horizontal frame 120.

[0072] The fourth tilting-reinforcing member 414 is inclined with a first end in close contact with the second end of the third reinforcing member 413 on the first side of the second horizontal frame 120, and a second end at the corner at the joint of the first horizontal frame 110 and the second horizontal frame 140.

[0073] As a result, the reinforcing members 400 are arranged 30 substantially in a W-shape or a zigzag shape inside the internal space 250.

[0074] Therefore, it is possible to the door from bending forward/backward and bending Left/right too.

[0075] As set forth above, according to exemplary embodiments of the invention, when a fire occurs at a place with a GRP door, the GRP door is prevented from bending due to a pressure 0 difference by the interior material disposed inside the frame and the reinforcing members, to a fire protecting performance can be improved.

[0076] Further, since the interior material inside the frame and the reinforcing members can be kept in positions in foaming of polyurethane that is foamed inside the frame even without a complicated configuration, so it is possible to reduce the manufacturing cost and improve productivity.

[0077] while the present invention has been illustrated and described in connection with the exemplary embodiments, it will be apparent to those skilled in the art that modifications and variations can be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

Claims 1. A GRP door having an enhanced fire protecting performance, comprising: a frame that has a vertically long rectangular shape; GRP (Glassfiber Reinforced Plastic) skins that are attached to the front and rear sides of the frame and made of plate-shaped GRP; an interior material that is disposed in an internal space defined by the frame and the GRP skins and made of phenolic foam; 10 and reinforcing members that are vertically elongated in the internal space, made of CRC (Cellulose fiber Reinforced Cement), and increasing bending strength of the frame and the interior material.
2. The GRP door of claim 1, wherein the frame includes: first and second horizontal frames transversely arranged at an upper end a lower end; and first and second vertical frames arranged longitudinally 20 and connecting the left and right ends of the first and second horizontal frames, wherein the reinforcing members are disposed on sides, which face the internal space, of the first and second vertical frames.
3. The GRP door of claim 2, wherein the reinforcing members are lumbers that are larger in size in the thickness direction than the width direction of the internal space.
4. The GRP door of claim 3, wherein the reinforcing members are a plurality of lumbers arranged in parallel in the transverse direction of the internal space.
5. The GRP door of claim 3, wherein the reinforcing members are arranged at acute angles between 70 and 80° with respect to the first horizontal frame, inside the internal 5 space.
6. The GRP door of claim 3, wherein the first and second horizontal frames respectively have a plurality of first and second grooves corresponding to each other, and both ends of the reinforcing members are inserted in the first grooves and the second grooves.
V. The GRP door of claim 2, wherein L-shaped reinforcing members are disposed insides corners at joints of 15 the first and second horizontal frames and the first and second vertical frames.
8. The GRP door of claim 3, wherein the reinforcing members include: a first tilting-reinforcing member that is inclined with a first end at the corner at the joint of the first horizontal frame and the first vertical frame and a second end on first side of the second horizontal frame; a second tilting-reinforcing member that is inclined with 25 a first end in close contact with the second end of the first reinforcing member on the first side of the second horizontal frame, and a second end on a first side of the first horizontal frame; a third tilting-reinforcing member that is inclined with 30 a first end in close contact with the second end of the second reinforcing member on a first side of the first horizontal frame, and a second end on the first side of the second horizontal frame; and a fourth tilting-reinforcing member that is inclined with a first end in close contact with the second end of the third reinforcing member on the first side of the second horizontal frame, and a second end at the corner at the joint of the first horizontal frame and the second horizontal frame.