Earthquake-resistant door member and earthquake-resistant door comprising same

Abstract

The present invention provides: an earthquake-resistant door member that is used for preventing a door opening operation of a door body in a door-closed state from being hindered by deformation of a door frame body; and an earthquake-resistant door to which said earthquake-resistant door member is attached. The present invention is formed from metal or ceramics, is provided with a first surface 20 that abuts on the door frame body and a second surface 10 on the opposite side to the first surface 20, and has a tapered part formed such that the interval between the first surface 20 and the second surface 10 continuously decreases from the maximum thickness to the minimum thickness in the short-side direction. Surface unevenness processing S is applied to at least a first surface rear part 21 that is the maximum plate thickness part or a part in the vicinity thereof, and a low friction layer C is formed on the second surface 10.

Description

Earthquake-resistant door components and earthquake-resistant doors equipped with the same

[0001] The present invention relates to an earthquake-resistant door component used to prevent the door body in a closed state from being obstructed from opening due to deformation of the door frame, and to an earthquake-resistant door to which this earthquake-resistant door component is attached.

[0002] 9(A) is an enlarged cross-sectional view of the door edge of an existing right-swinging door. Under normal conditions, there is a gap of 3 to 4 mm between the left side surface 111 of the door body 110 and the opposing inward side surface 121a of the left frame body 121. This allows the rear edge 111a of the left side surface 111 of the door body, which rotates with a maximum rotation radius Rmax, to open and close smoothly without coming into contact with the inward side surface 121a of the left frame body.

[0003] However, as shown in Figure 9 (B), if an earthquake or other event applies an external pressure F greater than a specified value to the door frame 120 attached to the exterior or interior wall of a building, causing the door frame 120 to deform and narrow or eliminate the gap on the door edge side, the left-side frame inner side surface 121a will enter inside the maximum rotation trajectory Qmax described by the rear edge portion 111a of the left side surface 111 of the door body, and a situation may arise in which the door body 110 will no longer be able to open (hereinafter this situation will be referred to as an "abnormal situation").

[0004] In order to open the door body 110 in this abnormal situation, a force (compression force) is required to push the door frame body 120 outward and a force (shear force) is required to open the door body 110 forward, but an external pressure F of approximately 100 to 200 kg is acting on the door frame body 120, and an opening force of approximately 200 to 300 kg is required to open the door body 110.

[0005] Such an emergency situation must be avoided as much as possible, as it would prevent people living in apartment buildings with few escape exits, people working in office buildings, people staying in hotels, and people using toilets and bathrooms in detached houses from evacuating to the outside. Therefore, the inventors of the present invention have proposed an earthquake-resistant door as described in Patent Document 1.

[0006] The earthquake-resistant door described in Patent Document 1 comprises a door body (1) that can rotate around the rotation axis of a hinge (4), and a frame body (2, 2') that surrounds the door body (1) when it is closed, and a member (3) with an arc-shaped cross section is attached to the side surface (2a) of the frame body (2). The surface of this arc-shaped cross section extends from the front end face of the frame body (2) to the back side in a horizontal plane perpendicular to the rotation axis, and its center is recessed relative to the side surface (1c) of the door body (1).

[0007] According to the earthquake-resistant door of Patent Document 1, even in an emergency situation where the door body (1) and the frame body (2) in a closed state are pressed together, the door body (1) and the frame body (2) come into contact via the member (3) with an arc-shaped cross section, and the door body can be opened and closed without hindrance along the arc shape (the rotational trajectory of the door body) with a small force of 10 kg or less depending on the conditions.

[0008] Utility Model Registration No. 3167660

[0009] The earthquake-resistant door described in Patent Document 1 is very effective in preventing situations where the door itself cannot be opened and people are unable to evacuate to the outside during an emergency such as an earthquake, but there are also issues that need to be improved in order to more reliably demonstrate its functionality and to widely popularize earthquake-resistant door components and earthquake-resistant doors.

[0010] The earthquake-resistant door component product of Patent Document 1 has a base material formed from a polycarbonate resin, which has excellent processability and impact resistance, and a low-friction coating of a silicone-based resin on its surface, providing sufficient strength and functionality under normal handling and use. However, because earthquake-resistant door components are installed in the gap at the edge of a door, their thickness is limited, with general-purpose products being thin plates with a maximum thickness of approximately 2 mm and a minimum thickness of approximately 0.3 mm. Due to their thinness, if the base material is formed from a resin material, the mechanical strength and impact resistance are not necessarily sufficient for use as a building component, and since baking paint cannot be applied, the surface hardness of the low-friction coating cannot be increased. Therefore, delicate handling is required for building components.

[0011] Furthermore, earthquake-resistant door components are expected to be used for 10 years or more in entrances and exits close to the outdoors. However, if they are required to be used for longer periods as architectural components, resin materials do not necessarily have sufficient durability or weather resistance, and depending on the usage conditions, there is a possibility of deterioration over time. If the mechanical strength or impact resistance of the base material is reduced, there is a risk of deformation or breakage in the event of an abnormal situation where the door is pressed against it with a large force. If the low-friction coating on the surface is deteriorated or peeled off, there is a risk of the opening force increasing. In either case, it becomes difficult to fully perform the desired function.

[0012] Conventional earthquake-resistant door components are not necessarily easy to handle or durable compared to the standards required for building materials and exterior fittings, so they require installation by a professional, and after long-term use of 10 years or so, component replacement may become necessary. This has been cited as a reason why construction and real estate businesses have refrained from adopting them, making sales to general users and installation by users themselves difficult, and is a major obstacle to the widespread use of earthquake-resistant door components and earthquake-resistant doors.

[0013] Furthermore, in the earthquake-resistant door of Patent Document 1, the easiest way to attach the earthquake-resistant door components is with double-sided adhesive tape or glue, and the attachment position can be easily adjusted. However, experiments by the inventor have revealed that during an emergency, depending on the periodic shaking of an earthquake and the state of pressure contact with the door body, a larger than expected shear force acts on the surface fixed with double-sided adhesive tape, which is vulnerable to shear force, causing the earthquake-resistant door components to shift backward from their specified attachment position, preventing them from fully performing their desired function.

[0014] In order to prevent malfunctions due to the falling off or misalignment of earthquake-resistant door components, methods have been devised in which the earthquake-resistant door components are fastened to the door frame using screws, or in which protrusions are provided on the backside of the earthquake-resistant door components to engage with the door frame. However, these methods require special processing to create screw holes or engagement grooves on the mounting surface of the door frame.

[0015] The installation of earthquake-resistant door components requires fine-tuning the position of the arc shape to maximize functionality while accommodating differences in door dimensions and changes in fit over time. In addition to this process, drilling screw holes and engagement grooves into the metal door frame while adjusting the positioning is difficult for ordinary businesses and users, and requires trained professionals, resulting in high costs and a long construction period. This is a major obstacle to the widespread adoption of earthquake-resistant door components and earthquake-resistant doors that can perform more reliably.

[0016] The present invention has been made in consideration of the above-mentioned problems, and aims to provide an earthquake-resistant door component and an earthquake-resistant door equipped with the same, which have high base material strength as a building component, are easy to handle, can function stably for a long period of time, can be installed by general businesses and users without requiring special processing on existing doors, and are expected to be widely used. Another aim is to provide an earthquake-resistant door component and an earthquake-resistant door equipped with the same, which can prevent the door frame from shifting from its predetermined installation position even if a large external force is applied due to deformation of the door frame in an emergency such as an earthquake, and can open the door with less opening force, thereby more reliably functioning.

[0017] The present invention provides a rectangular, thin plate earthquake-resistant door component that is attached to a door frame to prevent the door main body in a closed state from being hindered from opening due to deformation of the door frame caused by an external force, the earthquake-resistant door component being made of a metal or ceramic material and having a first surface that abuts a part of the door frame and a second surface opposite the first surface, the distance between the first surface and the second surface that defines the plate thickness having a tapering portion that continuously decreases from the maximum thickness to the minimum thickness in the short direction, the first surface having a surface textured at least at the maximum plate thickness portion or its vicinity to prevent the door frame from shifting from its predetermined mounting position along the abutment surface with the door frame when it deforms and presses against the opposing door main body, and a low-friction layer formed on the second surface at least at the maximum plate thickness portion or its vicinity to reduce the opening force required to rotate the door main body and open it when pressed against it.

[0018] The above-mentioned "continuous decrease from the maximum thickness to the minimum thickness" means that the thickness always tends to decrease without changing the increase or decrease trend from the maximum thickness to the minimum thickness. Therefore, the form in which the thickness decreases linearly from the maximum thickness to the minimum thickness, the form in which the thickness decreases curvedly, for example, along an arc-shaped curve, are all included in the form of "continuous decrease from the maximum thickness to the minimum thickness."

[0019] Furthermore, the "surface texture processing" is applied to generate a shear resistance force (frictional force and / or latching force) sufficient to allow the earthquake-resistant door component to remain in its specified installation position along the contact surface with the door frame without slipping later, even if the door frame is deformed by large external pressure in an emergency and the closed door body and earthquake-resistant door component are pressed together strongly, causing a large shear force to act on the earthquake-resistant door component. The unevenness of the hard metal or ceramic on the pressure-contact surface exerts an anchoring effect, providing a sufficiently large frictional force and latching force.

[0020] Furthermore, the "low-friction layer" is formed to reduce the coefficient of friction (static and dynamic) between the door body and the earthquake-resistant door component when they are pressed together with a large force in an emergency while in a closed state, thereby reducing the opening force required to rotate the door body and open it. A preferred embodiment is a baked layer containing a fluorine-based resin, which has excellent low-friction performance and high abrasion resistance and durability.

[0021] The inventor's experiments have confirmed that when an earthquake-resistant door component shifts backward along the abutment surface during an emergency, not only does the tapered portion shift backward, but the shape itself is also deformed. For the low-friction layer on the second surface to be effective, it is necessary for the tapered portion to maintain its predetermined shape and for the earthquake-resistant door component to function properly. Therefore, only when the slippage prevention effect of the textured surface on the first surface is exerted and the tapered portion maintains its predetermined shape can the low-friction layer on the second surface exert its opening force reduction effect. The synergistic effect of the textured surface on the first surface and the low-friction layer on the second surface maximizes the functionality of the earthquake-resistant door component, more reliably preventing door opening operations from being hindered during an emergency.

[0022] The earthquake-resistant door component of the present invention is easy to handle and durable as a building component, and can be attached to an existing door without requiring any special processing. Furthermore, it can be prevented from shifting from its predetermined mounting position even when a large external force is applied, and the door can be opened with a smaller opening force. These effects make it possible to provide an earthquake-resistant door that can more reliably avoid situations in which the door frame is deformed by an earthquake or other event, preventing the door from opening (particularly situations in which the door itself cannot be opened). Its widespread use is expected to contribute to saving lives and preventing and mitigating disasters during earthquakes.

[0023] 1A and 1B are front views of an earthquake-resistant door according to a first embodiment of the present invention, where (A) is a front view of the door body in a closed state and (B) is a front view of the door body in an open state. These are cross-sectional views taken along the P1-P1 line in FIGS. 1A and 1B, illustrating the opening and closing operations of the earthquake-resistant door. This is a partially enlarged cross-sectional view of the U portion in FIG. 2 under normal conditions. This is a perspective view of an earthquake-resistant door component according to a first embodiment of the present invention, where (A) is a perspective view from the front upper right and (B) is a perspective view from the rear upper left. This is a cross-sectional view taken along the P2-P2 line in FIG. 4A. This is a partially enlarged cross-sectional view of the U portion in FIG. 2 under abnormal conditions. This is a horizontal cross-sectional view of a modified example of the earthquake-resistant door component according to the first embodiment of the present invention. This is a six-sided view of a specific example of an earthquake-resistant door component according to the first embodiment of the present invention, where (A) is a side view and (B) is a partially enlarged view of the knurled portion. This is a partially enlarged cross-sectional view of the door edge of an existing right-swinging door, where (A) is a view showing the normal state and (B) is a view showing the abnormal state.

[0024] A preferred embodiment of the present invention will be described below with reference to Figures 1 to 8, assuming a right-swinging door. The front-to-back, left-to-right, and up-to-down directions in the description are defined as directions along the X, Y, and Z axes shown in each figure. Specifically, +X is the forward direction in which the door body 110 of the earthquake-resistant door 100 opens, -X is the rearward direction in which it closes, +Y is the right direction, -Y is the left direction, +Z is the upward direction, and -Z is the downward direction.

[0025] Furthermore, materials, structures, manufacturing methods, etc. for which descriptions are omitted may be the same or substantially the same as those known to those skilled in the art. In each drawing, the same reference numerals represent the same or equivalent components, and redundant descriptions will be omitted. To make the drawings easier to understand, some structures, such as the airtight rubber of the door stop and the double-sided adhesive tape, are omitted from the illustration.

[0026] First Embodiment An earthquake-resistant door component 1 according to a first preferred embodiment of the present invention is attached to an existing right- or left-hinged door. As shown in Figures 1(A), 1(B), 2 and 3, in an existing right-hinged door, the component is attached to the inward-facing side surface 121a of the left-side frame 121 that faces the left side surface 111 of the door body 110. An existing right-hinged door to which the earthquake-resistant door component 1 is attached is configured as an earthquake-resistant door 100.

[0027] The vertical dimension (length L) of the earthquake-resistant door component 1 is not particularly limited as long as it can perform the intended function of the present invention. Taking into consideration the height of the doorknob, a length of less than 900 mm is preferable to avoid the area near the center where the key receiver is located. To streamline the installation process, a length of approximately 100 to 600 mm is more preferable, and approximately 150 to 400 mm is even more preferable, so that the component can be easily held in one hand.

[0028] The arrangement and number of earthquake-resistant door components 1 are not particularly limited as long as they can perform the desired functions of the present invention. Considering in-plane deformation compliance, they are preferably attached to both the upper and lower ends of the inward-facing side surface 121a, while considering local deformation compliance, they are preferably attached near the center of the inward-facing side surface 121a. When attaching multiple components, it is preferable to arrange them approximately evenly. In this embodiment, a total of four earthquake-resistant door components 1, each about 200 mm in length, are attached approximately evenly: two at the upper and lower ends of the inward-facing side surface 121a and two at the top and bottom of the doorknob key holder.

[0029] In order to prevent the corners of the door body 110 from biting into the earthquake-resistant door component 1 in the event of an emergency, it is desirable to attach the earthquake-resistant door component 1 attached to both the upper and lower ends of the inward side surface 121a 20 to 30 mm away from the inward lower surface 123a of the upper frame body 123 and the inward upper surface 124a of the lower frame body 124.

[0030] The above-mentioned existing swing doors are mass-produced products manufactured to a predetermined standard, and the configuration of the door body 110, door frame 120, and hinge 130 is the same as that of mass-produced products. The standard size of the single-leaf door that is most commonly used as a door for the entrance or entry of an apartment building or building in Japan is an effective opening dimension of 800 mm wide x 1900 or 2000 mm high.

[0031] For example, the door body 110 is composed of front and rear panels and framework (frames and stiles). As shown in Figures 1(A) and (B) , the door body 110 has a left side surface 111 formed on its left side, a right side surface 112 formed on its right side, an upper surface 113 formed on its top surface, and a lower surface 114 formed on its bottom surface.

[0032] The door frame 120 is composed of a left frame 121 and a right frame 122 positioned on the left and right sides, and an upper frame 123 and a lower frame 124 positioned on the top and bottom sides. The left frame 121 has an inward side surface 121a that faces the left side surface 111 of the door body, the upper frame 123 has an inward lower surface 123a, and the lower frame 124 has an inward upper surface 124a.

[0033] The door body 110 is connected to the door frame body 120 via a hinge part 130 that is screwed between the door body right side surface 112 and the right frame body 122, and is rotatable around the central axis of the hinge part 130 as the rotation axis.

[0034] 4(A), (B), and 5, the earthquake-resistant door component 1 is a rectangular thin plate component with a horizontal cross section that approximates a wedge, and includes a right side surface 10, a left side surface 20, a top surface 30, a bottom surface 40, a front surface 50, and a rear surface 60. As will be described later, the horizontal cross section of the right side surface 10 presents an arc-like curve that bulges out toward the left side (toward the left side surface 20).

[0035] The front-to-rear dimension (width W) of the earthquake-resistant door component 1 is set based on the front-to-rear dimension (depth dimension) of the door frame 120 and door body 110 to which it is attached. If the rear end of the earthquake-resistant door component presses against and digs into the left side of the door body in the event of an emergency, this could potentially prevent the door body from opening or closing. Therefore, it is desirable to set the width W of the earthquake-resistant door component 1 to be the same as or slightly longer than the front-to-rear dimension of the left side of the door body 111 (the thickness of the door body 110). Specifically, it is desirable to set the width W so that it extends from the end of the bend R on the front of the left frame 121 to the position of the doorstop 121b at the rear of the left frame. For a standard product with a width W of 800 mm, the door body thickness is expected to be 36 to 40 mm, and the depth of the door frame to the doorstop is expected to be in the range of 40 to 44 mm.

[0036] The material forming the substrate of the earthquake-resistant door component is a metal or ceramic material with excellent mechanical strength and processability. Metal materials that can be extruded and have a Vickers hardness (HV) of 60 or more are preferred, including aluminum alloys, steel, stainless steel, titanium alloys, and magnesium alloys. From the perspectives of mechanical strength, processability, and manufacturing costs, aluminum alloys, steel, and stainless steel are preferred, with aluminum alloys being most preferred. Surface treatments such as anodizing may be performed. Ceramic materials that can be extruded and have high toughness are preferred, including alumina, zirconia, silicon nitride, and silicon carbide. From the perspectives of mechanical strength, toughness, and processability, alumina, zirconia, and silicon nitride are preferred, with zirconia being most preferred.

[0037] The earthquake-resistant door component 1 is formed by extrusion molding of an aluminum alloy. While extrusion molding is the preferred manufacturing method in terms of manufacturing costs and processing accuracy, it may also be formed by cutting or polishing a flat plate-shaped component, or by a combination of extrusion molding and cutting or polishing.

[0038] [Right Side 10 of Component] The right side 10 of the component corresponds to the "second surface" in the claims, and as shown in Figure 3, when the earthquake-resistant door component 1 is attached to a door comprising a door body 110 and a door frame 120, it forms the part facing the left side 111 of the door body 110 in the closed state, and also defines the plate thickness T as the distance from the left side 20 of the component.

[0039] The horizontal (short-side) cross-sectional shape of the right side surface 10 of the component is an arc-shaped section defined based on the maximum rotation locus Qmax described by the portion of the door body 110 that rotates with the maximum rotation radius Rmax (hereinafter referred to as the "door body maximum rotation radius portion 111a"). More specifically, the arc-shaped section has a radius R10 equal to or greater than the maximum rotation radius Rmax and is formed as an arc-shaped section that bulges out toward the frame side (the left side surface 20 of the component) so that the earthquake-resistant door component 1 attached to the door frame 120 is positioned on or outside the line of the maximum rotation locus Qmax.

[0040] Since the earthquake-resistant door component 1 of the present invention is intended to be attached to existing doors (to increase versatility), the doors to which it is attached are generally standardized mass-produced products, and the maximum pivot locus Qmax and maximum pivot radius Rmax of the door body 110 also exist as standardized, known data. Therefore, the arc shape can be set based on the standardized, known maximum pivot locus Qmax and maximum pivot radius Rmax, and can be set as an arc with a center point at the pivot center of the existing door and a radius R10 equal to or greater than the radius Rmax. For the most commonly used standardized product with a width W of 800 mm, the maximum pivot radius Rmax is designed to be 820 mm.

[0041] The pivot center of the mass-produced hinged door (door body 110) is generally offset forward relative to the front panel of the door body 110. Therefore, in an earthquake-resistant door component 1 having the right side surface 10 formed in the arc shape set by the above-described method, the thickness T, defined as the distance between the right side surface 10 and the left side surface 20, reaches a maximum thickness Tmax at the rear surface 60 and a minimum thickness Tmin at the front surface 50. The thickness T gradually decreases (decreases) in the short direction from the rear surface 60 to the front surface 50. The maximum thickness Tmax may be set to a value smaller than the clearance between the door body 110 and the left frame 121 under normal conditions. While the clearance is designed to be 4 mm, this varies depending on the attachment state of the door body to the door frame, changes in the installation over time, and so the clearance is generally expected to be in the range of approximately 2 to 4 mm.

[0042] In an earthquake-resistant door 100 equipped with an earthquake-resistant door component 1 having a right side surface 10 with an arc shape set using the above method and a width W set from the end of the bend R on the front surface of the left frame 121 to the position of the door stop 121b behind the left frame 121, as shown in Figure 3, under normal conditions, the area slightly forward of the rear end of the right side surface 10 (the boundary with the rear surface 60 of the component, hereinafter referred to as the "rear end 10a of the right side surface") is closest to the maximum turning radius 111a of the door body, located at the rear edge of the left side surface 111 of the door body, as shown in Figure 3. Note that in an earthquake-resistant door 100 equipped with an earthquake-resistant door component 1 with a width W set equal to the length of the left side surface 111 of the door body (the thickness of the door body 110), the rear end 10a of the right side surface 10 is closest to the maximum turning radius 111a of the door body under normal conditions. Meanwhile, the front end of the right side surface 10 is furthest from the left side surface 111 of the door body. Therefore, as shown in Figure 6, in the event of an abnormality, it is expected that the rear end portion 10a of the right side surface of the member or its vicinity will come into contact with the maximum rotation radius portion 111a of the door body, and this contact will be in a pressure contact state accompanied by an external force F1.

[0043] A low-friction layer with a low friction coefficient is formed on the right side surface 10 of the member so that the door body 110 can be rotated and opened with as little opening force as possible even if it abuts (presses) against the left side surface 111 of the door body with a large force in the event of an emergency (area C). It is difficult to specify the static friction coefficient between area C and the left side surface 111 (maximum rotation radius portion 111a) in the event of an emergency because the surface properties of the left side surface 111 are unspecified and it is in a state where it is pressed against the left side surface 111 with a large external force. However, since the value is considered to be proportional to the friction coefficient of area C, it is preferable that the friction coefficient (static friction coefficient and kinetic friction coefficient) of area C is smaller.

[0044] The coefficient of friction can be measured, for example, by a method conforming to JIS K7125, in which a flat mating member made of unpainted smooth steel (polished material) or steel with a steel door coating on its upper surface, or a flat mating member made of the same material as the earthquake-resistant door component with a low-friction layer on its upper surface, is placed on a horizontal test table, and a flat test piece made of the same material as the earthquake-resistant door component with a low-friction layer on its lower surface is moved on top of it under a predetermined load to measure the coefficient of static friction. The coefficient of static friction of the low-friction layer surface is preferably 0.20 or less, more preferably 0.15 or less, and even more preferably 0.10 or less.

[0045] From the viewpoint of low friction performance, durability, abrasion resistance, etc., preferred examples of the low friction layer include a baked layer containing a solid lubricant, a hard coat layer containing an inorganic oxide component with a low friction coefficient, a vapor deposition layer of diamond-like carbon or ceramic with a low friction coefficient, and a surface modified layer in which a solid lubricant has been diffused and penetrated.

[0046] Specific examples include baked layers containing solid lubricants such as fluorine-based resins, molybdenum compounds, and graphite. Two or more of these solid lubricants may be used. The solid lubricants are preferably fluorine-based resins and molybdenum compounds in terms of low friction performance, durability, etc., and fluorine-based resins are most preferred. Details of fluorine-based resins and the like will be described later in the specific examples.

[0047] The baked layer is formed by coating the right side surface 10 with a liquid or powder coating composition containing a solid lubricant, binder resin, etc., followed by drying and heat treatment to harden it. Baking coating can produce a baked layer with high surface hardness and excellent abrasion resistance and durability. To improve adhesion to the baked layer, the substrate may be subjected to surface treatment such as blasting or the formation of a primer layer. The thickness of the baked layer is preferably in the range of 5 to 100 μm, more preferably 7.5 to 75 μm, and even more preferably 10 to 50 μm, in terms of low friction performance, durability, peel resistance, etc. The manufacturing method, including other ingredients, coating method, and heat treatment conditions, is not limited as long as a baked layer with the desired properties is obtained.

[0048] Also, silica (SiO ２ ), alumina (Al２ O ３ ), zirconia (ZrO ２ Examples of the inorganic oxide component include a hard coat layer containing an inorganic oxide component such as SiO2, SiO2, SiO3, SiO4, SiO5, SiO6, SiO2, SiO2, SiO3, SiO4, SiO5, SiO6, SiO2, SiO2, SiO2, SiO3, SiO4, SiO2 ...

[0049] The hard coat layer is formed by coating the right side surface 10 of the component with a coating composition containing an oligomer formed by reacting raw materials such as silicon alkoxide or metal alkoxide of aluminum, or a coating composition containing inorganic oxide fine particles and a resin component monomer or oligomer, drying the coating, and then curing the coating composition by ultraviolet irradiation or heat treatment. The thickness of the hard coat layer is preferably in the range of 0.5 to 30 μm, more preferably 1 to 15 μm, from the viewpoints of low friction performance, durability, peel resistance, etc. The manufacturing method, such as other compounding ingredients, coating method, and curing conditions, is not limited as long as a hard coat layer with the desired properties is obtained.

[0050] Further examples include low-friction deposition layers (deposition layers) formed by vapor deposition of nitride-based ceramics such as diamond-like carbon (DLC), titanium carbonitride (TiCN), and chromium nitride (CrN), and carbide-based ceramics such as titanium carbide (TiC). DLC and TiCN are preferred for their low-friction performance and durability, with DLC being the most preferred. DLC is an amorphous, hard film primarily composed of hydrocarbons or carbon allotropes. It may be hydrogen-free DLC composed solely of carbon, or DLC containing metal elements or fluorine. DLC (PLC) with a high hydrogen content and graphite-like DLC (GLC) are more preferred because they are soft and have a low coefficient of friction. "Containing DLC ​​as the main component" means that the material essentially consists of DLC; other trace components may be added, and other underlayers or intermediate layers may be provided.

[0051] Examples of deposition methods for the vapor deposition layer (deposition layer) include physical vapor deposition (PVD) methods such as vacuum deposition, ion plating, and sputtering, and chemical vapor deposition (CVD) methods such as thermal CVD, plasma-enhanced CVD, and atomic layer deposition (ALD). The substrate is placed in the processing chamber of these deposition devices so that a thin film is formed on the right side surface 10 of the component, and then the deposition is performed. To improve adhesion to the vapor deposition layer, the substrate may be subjected to surface treatment such as shot peening or the formation of a base layer. The thickness of the vapor deposition layer is preferably in the range of 0.5 to 10 μm, more preferably 1 to 5 μm, in terms of low friction performance, durability, peel resistance, etc. The deposition conditions, such as the type and composition of raw materials and carrier gas, degree of vacuum, and deposition temperature, are not limited as long as a vapor deposition layer (deposition layer) with the desired properties is obtained.

[0052] Another example is a surface-modified layer in which a solid lubricant such as molybdenum disulfide is diffused and infiltrated. Molybdenum disulfide is the most preferred solid lubricant due to its low-friction performance, durability, and other properties. When shot-blasting with molybdenum disulfide, the molybdenum disulfide diffuses and infiltrates the surface of a metal or other material, and adheres to the surface to form a strong coating. The thickness of the surface-modified layer, including the thickness of the coating formed on the surface, is preferably in the range of 1 to 20 μm, more preferably 2.5 to 10 μm, from the viewpoints of low-friction performance, durability, peeling resistance, and other properties. The particle size of the molybdenum disulfide, injection speed, binder resin, and other compounding components are not limited as long as a surface-modified layer with the desired properties is obtained.

[0053] The low-friction layer in the present invention is not limited to the above, but broadly includes a low-friction layer that can provide the desired low-friction performance. For example, a solid lubricant or ceramic coating may be formed on the surface of the substrate by thermal spraying, or a solid lubricant may be impregnated into the surface of a substrate that has been made porous by surface treatment, and then hardened to form a coating.

[0054] The position and range of region C where the low-friction layer is formed are determined so as to more effectively prevent the door opening operation of the door body 110 from being impeded by pressure contact between the door body left side surface 111 and the component right side surface 10 caused by the external force F1. In this embodiment, the portion that is likely to come into contact (pressure contact) with the door body left side surface 111 in an emergency is understood to be the rear portion of the component right side surface 10, which has the maximum plate thickness Tmax and is closest to the door body left side surface 111 under normal conditions. Therefore, in order to reduce the coefficient of friction between them in an emergency and preferably reduce the opening force, it is necessary to set region C to the rear portion of the component right side surface 10, including the maximum plate thickness portion or its vicinity, where a large external force (normal force) is likely to act.

[0055] The area C where the low-friction layer is formed may be the entire right side surface 10 of the component, or, similar to the area S where the surface texture processing described below is performed, it may be a strip-like area extending in the longitudinal direction and having a predetermined width, including at least the maximum thickness portion or its vicinity. The width of the strip-like area C is, for example, in the range of 1 / 20 to 1 / 4 of the width W of the earthquake-resistant door component 1. Multiple linear or dot-like areas C may also be distributed. In this embodiment, area C is the entire right side surface 10 of the earthquake-resistant door component 1. Although extending area C to the front portion of the right side surface of the component would likely have little effect in reducing the opening force, forming the area over the entire side surface may simplify the coating and film-forming process. Note that extending the low-friction layer significantly onto the left side surface 20 of the component is undesirable, as it reduces the effect of the surface texture processing and adhesive fixing material, hindering the slippage prevention effect.

[0056] As shown in Figure 6, when the rear end 10a of the right side of the component or its vicinity is in a pressure contact state with the maximum turning radius portion 111a of the door body, a shear force F2 due to an external force F1 acts on the earthquake-resistant door component 1 along the inward side 121a of the left frame 121 to which the earthquake-resistant door component 1 is attached. Under these conditions, a shear force F2 is exerted on the earthquake-resistant door component 1, which is calculated by multiplying the tangent of the angle α formed by the tangent line Ta of the maximum turning locus Qmax at the maximum turning radius portion 111a of the door body and the inward side 121a by the external force F1. This shear force F2 acts on the earthquake-resistant door component 1 to move it rearward from its normal installation position. To prevent this rearward movement (displacement) of the earthquake-resistant door component 1, it is useful to apply a shear resistance force (frictional force and / or latching force) equal to or greater than the shear force F2 to the area where the left side 20 of the earthquake-resistant door component 1 contacts the inward side 121a. The shear resistance will be described in detail later in connection with the left side surface 20 of the member.

[0057] [Left Side 20 of Component] The left side 20 of the component corresponds to the "first surface" in the claims, and as shown in Figure 3, when the earthquake-resistant door component 1 is attached to the door frame 120, it forms a portion that abuts against the inward side 121a of the left frame 121. For this reason, the left side 20 of the component has a shape complementary to the inward side 121a, for example, a flat shape. Furthermore, as shown in Figure 4(B), at least the left side 20 of the component at or near the maximum plate thickness portion is textured to prevent displacement from the predetermined attachment position along the abutting surface (area S). This "surface roughening" can generate a shear resistance force (friction force and / or latching force) at the contact surface that is greater than the ability of the earthquake-resistant door component 1 to remain in the specified installation position without shifting backward along the inward side surface 121a, even if the door frame 120 is subjected to large external pressure and deformed in an emergency, causing the left side surface 111 of the door body in the closed state to come into strong contact with the earthquake-resistant door component 1 and a large shear force to act on it.

[0058] Preferred examples of surface roughening include knurling, friction material coating, and blasting. Knurling patterns include twill or flat grain, and processing methods include cutting or rolling. For flat grain patterns, it is preferable to cut the surface in the longitudinal direction. Cutting forms grooves, and rolling forms grooves and protrusions on the surface. Knurling of ceramic materials is preferably performed after preliminary firing before the actual firing. Friction material coatings include coatings of metal, ceramic, or resin-based friction materials, and coating methods include application as a paint, bonding / baking using an adhesive, or thermal spraying. Blasting includes sand, shot, or grit blasting using metal, ceramic, or resin-based abrasives.

[0059] These processing methods may be used in combination. For example, a friction material may be coated into the unevenness created by knurling, or the uneven surface may be further roughened by blasting. Note that the surface unevenness processing in the present invention is not limited to the above-mentioned methods, but includes a wide range of processing methods that can form an uneven surface structure that provides the desired shear resistance. For example, the uneven surface structure may be formed by precision cutting or transfer processing, electric discharge processing, laser processing, etching, etc.

[0060] The position and range of the region S where the surface texture is applied are determined so as to more effectively suppress movement (prevent displacement) of the earthquake-resistant door component 1 caused by the external force F1 and shear force F2. In this embodiment, the portion that is most likely to come into contact (pressure contact) with the left side surface 111 of the door body in an emergency is understood to be the rear portion of the right side surface 10 of the component, which has the maximum plate thickness Tmax and is closest to the left side surface 111 of the door body under normal conditions. On the other hand, the front portion of the right side surface 10 of the component, which has a large clearance with the left side surface 111 of the door body, does not come into contact with the left side surface 111 of the door body even in an emergency, and in some cases may be separated from the left frame 121 by an external force. Therefore, in order to suitably generate a large shear resistance force (frictional force and / or latching force) that will allow the earthquake-resistant door component 1 to remain in its designated position without shifting relative to the inward surface 121a of the left-side frame body 121 in the event of an emergency, it is necessary to designate the rear portion of the left side surface 20 of the component (hereinafter referred to as the "rear portion 21 of the left side surface of the component") as region S, which includes the maximum plate thickness part or its vicinity, where a large external force (normal force) is likely to act in the event of an emergency.

[0061] In this embodiment, region S is strip-shaped with a predetermined front-to-back dimension (width w). A strip-shaped region S is preferred for ease of processing and its effectiveness in preventing misalignment. The area of ​​region S is set by considering a balance between misalignment prevention effect, processing costs, and mounting strength. Expanding the region to be textured on the left front side 22 of the component results in a small improvement in the misalignment prevention effect, increased processing costs, and a smaller region S' where the adhesive fixing material is provided, resulting in a decrease in mounting strength. The width w of region S is preferably in the range of 1 / 20 to 1 / 4 of the width W of the earthquake-resistant door component 1, more preferably 1 / 15 to 1 / 5, and even more preferably 1 / 10 to 1 / 6.

[0062] The shape of the region S is not particularly limited as long as it can exhibit the predetermined function of the present invention. It may be a linear shape with a smaller width w, or may occupy a range that occupies at least one-third of the width W. A plurality of regions S may be spaced apart in the vertical and / or horizontal directions (distributed in a linear or spotted manner). In the spaced apart shape, it is sufficient that the region S occupies a part or most of the rear left side surface portion 21 of the member.

[0063] To effectively prevent rearward movement (slippage) of the earthquake-resistant door component 1 due to the external force F1 and shear force F2, it is useful for a frictional force, which can act as a shear resistance force, to act between the left side surface 20 of the component and the left frame inner side surface 121a. Therefore, in order to enhance the slippage prevention effect, it is useful to increase the static friction coefficient μ between the rear portion 21 (region S) of the left side surface of the component, which is subjected to surface roughening, and the inner side surface 121a. Here, the normal force acting between region S and the inner side surface 121a is equivalent to the external force F1. Therefore, theoretically, under the above conditions, the slippage prevention effect can be effectively achieved by increasing the static friction coefficient μ between region S and the inner side surface 121a to be greater than the tangent value of angle α.

[0064] The static friction coefficient μ between region S and the inward side surface 121a varies depending on the surface properties of region S and the inward side surface 121a, such as the material, surface roughness, and coating condition. In reality, the surface properties of the inward side surface 121a are unspecified, making it difficult to determine the static friction coefficient μ in an abnormal situation where an external force of approximately 100 to 200 kg acts to press the surface together. However, since the value μ is understood to be proportional to the friction coefficient of region S, the larger the friction coefficient (static friction coefficient and dynamic friction coefficient) of region S, the better. A method for measuring the friction coefficient includes, for example, a method similar to JIS K7125, in which a flat mating member made of unpainted, smooth steel (polished material), a steel with a steel door coating applied to the upper surface, or a flat mating member made of the same material as earthquake-resistant door components with a textured upper surface is placed on a horizontal test table, and a flat test piece made of the same material as earthquake-resistant door components with a textured lower surface is moved above the mating member under a predetermined load to measure the friction coefficient. The static friction coefficient is preferably 0.5 or more, more preferably 0.75 or more, and even more preferably 1.0 or more.

[0065] The earthquake-resistant door component of the present invention is primarily intended for installation on entrance doors for dwellings in apartment complexes and housing complexes, entrance doors to offices in office buildings, entrance doors to guest rooms in hotels and inns, and fire doors along evacuation routes in these buildings, to prevent situations in which the door body cannot be opened during an emergency such as an earthquake, preventing evacuation to the outside. These doors are legally required to be fire-resistant to prevent the spread of fire, and their door frames and door bodies are made of steel, with their exterior surfaces coated. In an emergency, an external force of approximately 100 to 200 kg acts on the door frame, causing strong pressure between the left side surface 111 of the door body and the earthquake-resistant door component 1. The unevenness formed on the surface of the rear portion 21 (region S) of the left side surface of the component is expected to penetrate the coating on the inner side surface 121a of the left frame, resulting in an anchor effect that can provide a latching force that can act as shear resistance.

[0066] Generally, the thickness of the rust-preventive coating film on the surface of steel material is about 20 to 50 μm, and the thickness of the topcoat coating film is about 20 to 50 μm. In surface treatments that can set an uneven shape, such as knurling, the unevenness height is preferably 100 μm (0.1 mm) or more, more preferably 200 μm (0.2 mm) or more, and even more preferably 300 μm (0.3 mm) or more. The uneven shape is not particularly limited as long as it can obtain the desired frictional force and latching force, but from the perspective of anchor effect, an acute angle of 90° or less that easily bites into the coating film is preferred.

[0067] For surface treatments such as friction coating and blasting, where the uneven shape cannot be precisely set, one method for measuring the surface shape is to use a non-contact or contact surface roughness measuring device to calculate the arithmetic mean roughness (Ra), maximum height (Rz), and ten-point mean roughness (Rzjis), in accordance with JIS B0601 2013. Under normal conditions, the surface roughness of the area S closest to the left side surface 111 of the door body is measured. The ten-point mean roughness (Rzjis) is preferably 100 μm or more, more preferably 200 μm or more, and even more preferably 300 μm or more.

[0068] In processes such as knurling and blasting, the surface of the workpiece is scraped, so if the left side surface 20 of the workpiece before processing is used as the reference surface, the surface irregularities in region S after processing will be formed in the negative direction. However, in the event of an emergency, region S and the inner side surface 121a of the left frame will be strongly pressed together with an external force of approximately 100 to 200 kg, and the desired frictional force and latching force can be expected due to the pressure contact of the surface irregularities in region S and their penetration into the painted surface. The closer the position of the tip of the surface irregularities formed in the negative direction is to the reference surface before processing, the better. In measurements such as the ten-point average roughness (Rzjis), it is preferable for it to be within -0.5 mm from the reference surface.

[0069] Furthermore, knurling by rolling (part of the unevenness), friction material coating, etc., protrudes from the surface of the workpiece, so if the left side surface 20 of the member before processing is used as the reference plane, the surface unevenness in region S after processing will be formed in the positive direction. Even in processing methods in which the surface is scraped, the rear portion 21 of the left side surface of the member may be made thicker by the amount of scraping, so that the surface unevenness will be formed in the positive direction. The position of the tip of the surface unevenness formed in the positive direction should preferably not exceed the height of the adhesive fixing surface of the adhesive fixing material in the adjacent region S', as this may reduce the adhesive strength if it exceeds the adhesive fixing surface. In similar measurements, it is preferable that it be within +0.5 mm from the reference plane.

[0070] An adhesive fixing material such as double-sided adhesive tape, a magnetic sheet, or an adhesive is laid or applied to the front portion of the left side surface 20 of the member (hereinafter referred to as the "left side surface front portion 22 of the member") to function as an adhesive fixing surface for the inward side surface 121a of the left frame body 121 (region S'). The type and structure of the adhesive fixing material are not particularly limited as long as it can perform the desired function of the present invention. From the standpoints of manufacturing cost and adhesive strength, double-sided adhesive tape or adhesive is preferred, while a removable magnetic sheet is preferred in consideration of repainting the door. As long as sufficient adhesive fixing strength is obtained, a thinner thickness is preferable, and a higher shear strength is preferable. Note that protrusion of the adhesive fixing material into region S, where surface texture processing is performed, is undesirable because it reduces shear resistance and hinders the anti-slip effect.

[0071] Region S' may be formed as a recessed portion, taking into consideration the thickness of the adhesive fixing material. For example, a groove or hole may be formed in a relatively thick portion of the front left side surface 22 of the component with a cutting allowance equal to the thickness of the adhesive fixing material, and the adhesive fixing material may then be laid or bonded therein. This allows the rear left side surface 21 of the component (region S), which is subjected to the surface texture processing, to be in good contact with the inward side surface 121a, even if a double-sided adhesive tape or a magnetic sheet of a predetermined thickness is interposed between the left side surface 20 of the component and the inward side surface 121a of the left frame.

[0072] [Effects of the First Embodiment] With the earthquake-resistant door component 1, even in an emergency, as shown in FIG. 6 , the rear end 10a of the right side surface of the component or its vicinity comes into contact with the maximum turning radius portion 111a of the door body 110, thereby restricting deformation of the left frame body 121 and preventing the left frame body 121 from entering inside the maximum turning locus Qmax of the door body 110, thereby preventing obstruction to the opening operation of the door body 110.

[0073] Even if a large shear force F2 is applied to the earthquake-resistant door component 1 in an emergency, a shear resistance force (frictional force and / or latching force) equal to or greater than the shear force F2 acts on the contact surface between the rear portion 21 of the left side surface 20 of the earthquake-resistant door component 1 and the inner side surface 121a of the left frame, allowing the earthquake-resistant door component 1 to remain in the specified installation position without shifting backward along the inner side surface 121a of the left frame. In addition, the low-friction layer formed on the entire right side surface 10 of the component significantly reduces the friction coefficient at the contact surface with the door body 110, more reliably preventing interference with the door opening operation of the door body 110, and under certain conditions, the door body 110 can be opened with a small opening force of 10 kg or less.

[0074] Furthermore, the earthquake-resistant door component 1, which can function more reliably, can be attached using double-sided adhesive tape, a magnetic sheet, etc., without the need for special processing to create screw holes or engagement grooves in the left frame 121 of an existing door, meaning that installation is possible even by general users, without the need for a specialist. This will enable the widespread use of the earthquake-resistant door component 1, and many mass-produced doors can be configured as earthquake-resistant doors 100.

[0075] [Modification of the First Embodiment] In the earthquake-resistant door component 1 having the above-described configuration, the horizontal cross-sectional shape of the component right side surface 10 is an arc shape defined by the maximum rotation locus Qmax described by the maximum rotation radius Rmax of the door body 110. However, the earthquake-resistant door component 1' may have a component right side surface 10' with the following shape:

[0076] The earthquake-resistant door component 1' having a different right side surface 10' is configured so that it is positioned outside the maximum rotation locus Qmax when the earthquake-resistant door 100 is constructed, thereby preventing interference with the door opening operation of the door body 110 in an emergency. The shape of the right side surface 10 may be any shape as long as it provides this effect. For example, as shown in Figure 7, the right side surface 10' may be formed so that its horizontal cross-sectional shape is a straight line (diagonal line) at a predetermined angle β with respect to the left side surface 20 of the component.

[0077] In the earthquake-resistant door component 1' with the right side surface 10', for the same reason as the angle α of the earthquake-resistant door component 1, the static friction coefficient μ between the rear portion 21 of the left side surface of the component and the inward side surface 121a is made larger than the tangent value of the inclination angle β to effectively prevent slippage. The horizontal cross-sectional shape of the earthquake-resistant door component 1' is determined by setting the maximum plate thickness Tmax, inclination angle β, and width W to predetermined values. The maximum plate thickness Tmax is set to a value smaller than the clearance between the door body 110 and the left frame body 121 under normal conditions.

[0078] 8 shows a specific example of an earthquake-resistant door component 1, which is a rectangular thin plate component made of aluminum alloy (A-6063) with a longitudinal length L of 190 mm and a transverse width W of 43 mm. The transverse side profile of the component gradually decreases (decreases) from a maximum thickness of 2.15 mm to a minimum thickness of 0.3 mm from the rear surface 60 to the front surface 50 of the component, and the right side surface 10 of the component is formed into an arc shape with a radius of 826 mm that bulges out toward the left side surface 20 of the component.

[0079] A low-friction coating layer containing a fluororesin is baked onto the entire right side surface 10 of the component (area C). The surface of the molded aluminum substrate is degreased and cleaned, and a coating composition containing a fluororesin is spray-coated onto the entire right side surface 10 of the component, dried, and then placed in an electric furnace for heat treatment at 200°C in an atmospheric atmosphere for 20 minutes, baking a low-friction thin film onto the aluminum substrate. Although not shown in the drawings, all surfaces except the left side surface 20 of the component are coated. The composition of the coating composition is shown in Table 1 below. Each base material is a liquid composition in which a solid lubricant, a binder resin, and an additive are dispersed or dissolved in an organic solvent. A total of six test samples were prepared with different coating compositions and coating layer thicknesses.

[0080]

[0081] Examples of fluororesins include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), and tetrafluoroethylene-ethylene copolymer (ETFE). From the viewpoints of low friction performance, durability, heat resistance, and the like of the coating layer, PTFE, PFA, and FEP are preferred, with PTFE being the most preferred. The molecular weight and particle size of these fluororesins are not limited as long as they are within a range that allows the coating composition and coating layer to achieve the desired properties. From the viewpoints of coatability, low friction performance, durability, and the like during the process, the blending amount of the fluororesin in the coating composition is preferably in the range of 5 to 25 wt %, and more preferably in the range of 7.5 to 20 wt %.

[0082] The types of molybdenum compounds include molybdenum disulfide (MoS ２ ), molybdenum trisulfide (MoS ３ and organic molybdenum compounds such as molybdenum dialkyldithiophosphate (MoDTP) and molybdenum dialkyldithiocarbamate (MoDTC). From the viewpoints of low friction performance, durability, cost, etc. of the coating layer, inorganic molybdenum compounds are preferred, and molybdenum disulfide (MoS ２) is most preferred. There are no limitations on the particle size or particle thickness of these molybdenum compounds, as long as the coating composition and coating layer can achieve the desired properties. The amount of the molybdenum compound in the coating composition is preferably in the range of 2.5 to 20 wt %, more preferably in the range of 5 to 15 wt %, from the viewpoints of coating properties in the process, the appearance of the coating layer, low friction performance, etc.

[0083] The opening force of the test specimen (right-swinging door) equipped with each of the prepared test samples was measured using the JIS A1521 2018 single-swing door set in-plane deformation followability test method as a reference. Periodic frame deformation and pressure force measurements were not performed. The sample was attached with double-sided adhesive tape in two locations: one near the top edge of the left frame and one near the left edge of the upper frame. Masking tape was applied to the frame to weaken the adhesive strength between the frame and the sample. The test conditions were in-plane deformation of the frame height of 1 / 120, 1 / 100, and 1 / 90 rad. The results are shown in Table 2 below. The Superior Housing Component Certification Standard (BL Standard) for earthquake-resistant doors stipulates that the door must be able to be opened with an opening force of 500 N (50.99 kg) or less at an in-plane deformation of 1 / 120.

[0084]

[0085] The results in Table 2 show that the opening force for all test samples was below the target of 50 kg. In particular, the samples of Examples 1 to 6, which had a baked-on low-friction coating layer containing a fluororesin such as PTFE, had an opening force significantly below 50 kg. In Examples 4 and 6, which contained molybdenum disulfide, the opening force was reduced to approximately 10 kg with an in-plane deformation of 1 / 120, demonstrating that the door could be easily opened manually. Furthermore, when the condition of each test sample attached to the left frame was visually inspected after the test, scratches were observed on the coating surface of the right side surface 10 of the component. However, despite the adhesive strength being weakened by the masking tape, no rearward displacement from the pre-test mounting position was observed, and no arc-shaped deformation of the right side surface 10 of the component was observed.

[0086] In Example 7, in which a coating containing a silicone-based resin was applied and baked onto the entire right side surface 10 of the member, the opening force never fell below 30 kg, even when the composition and film thickness were adjusted. The low-friction coating layer of silicone-based resin was highly effective on polycarbonate substrates, but was not necessarily effective enough on aluminum substrates. While the mechanism is unclear, it is thought that under conditions of strong pressure contact with the door body, the coating layer on the hard aluminum substrate was partially compressed and fractured, exposing the substrate's bare surface.

[0087] Additionally, the rear left side surface 21 of the component, including the area in front of and near the maximum thickness portion, is knurled with a strip-like, flat-grain pattern extending longitudinally (area S). The width w is 4 mm, and the knurling extends from the rear end (maximum thickness portion) of the rear left side surface 21 of the component forward, leaving a 1 mm wide, unprocessed area, and extends from 1 to 5 mm. Four grooves with a V-shaped cross section and a depth of 0.5 mm are cut at a pitch of 1 mm. The width w is preferably in the range of 2 to 11 mm, more preferably in the range of 3 to 9 mm, and even more preferably in the range of 4 to 7 mm.

[0088] An approximately 0.3 mm thick acrylic double-sided adhesive tape is laid over the entire left front side 22 of the component as an adhesive fixing material (area S'), thereby adhesively fixing the component to a predetermined mounting position on the inner side surface 121a of the left frame.

[0089] When using a thick and hard magnetic sheet as the adhesive fixing material, a recess may be formed in the front portion 22 of the left side of the component and the magnetic sheet may be laid therein. Figure 8 illustrates a structure in which a strip-shaped groove, 15 mm wide and 0.4 mm deep, extending longitudinally from the rear end of the left side of the component to 7 to 22 mm forward, is cut, and a strip-shaped magnetic sheet, 15 mm wide and approximately 0.5 mm thick, is bonded thereto with adhesive. Examples of magnetic sheets include resin sheets such as synthetic rubber containing neodymium-based magnetic powder. An epoxy resin containing magnetic powder may be applied and cured to form a resin layer. To ensure strength, the thickness of the recess is preferably 0.4 mm or more.

[0090] If the corner of the rear end of the rear part 21 of the left side surface of the component is scraped off by the surface roughening process, the entire earthquake-resistant door component 1 may tilt relative to the inner side surface 121a of the left frame in the event of an emergency, which may change the arc shape of the right side surface 10 of the component that faces the left side surface 111 of the door body. To prevent most or all of the corner from being scraped off, it is preferable to leave an unprocessed portion in region S, with a gap of 0.5 to 2 mm in width, from the rear end of the rear part 21 of the left side surface of the component toward the front.

[0091] Next, using a test device capable of high-precision measurements and periodic frame deformation, the opening force of a test specimen (right-swinging door) equipped with the sample from Example 6 was measured in accordance with the JIS standard test method. The samples were attached with double-sided adhesive tape at six locations: two near the top and bottom ends of the left frame, two near the center between the doorknob key holders, one near the left end of the upper frame, and one near the center. The test conditions were an in-plane deformation of the frame height of 1 / 120 and 1 / 100 rad, and a local deformation of the door-end frame of 8 mm. The opening force measurement results are shown in Table 3 below. The BL standard for earthquake-resistant doors requires that a door be opened with an opening force of 500 N (50.99 kg) or less even with a local deformation of 8 mm.

[0092]

[0093] The opening force was below 500 N under all test conditions. Furthermore, visual inspection of the sample attached to the left frame after the test revealed scratches on the low-friction coating on the right side surface 10 of the member, which is in pressure contact with the left side surface of the door body. However, no rearward displacement from the pre-test mounting position was observed, and no arc-shaped deformation of the right side surface 10 of the member was observed. In this test, the door frame was subjected to cyclic deformation (three stages of in-plane displacement up to the set in-plane displacement, with three repeated in-plane displacements at each stage). It is believed that the knurling on the rear portion 21 of the left side surface of the member generated sufficient shear resistance (frictional force and / or latching force) to counter the resulting cyclic shear force at the contact surface between the inner side surface of the left frame and the left side surface 20 of the member, allowing the sample to remain in the specified mounting position without rearward displacement.

[0094] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments and various modifications are possible without departing from the spirit of the present invention. Furthermore, even configurations not directly described in the specification and drawings are within the scope of the technical idea of ​​the present invention as long as they achieve the functions and effects of the present invention.

[0095] 1, 1'... earthquake-resistant door component, 10, 10'... right side of component (area C), 10a... rear end of right side of component, 20... left side of component, 21... rear part of left side of component (area S), 22... front part of left side of component (area S'), 30... top surface of component, 40... bottom surface of component, 50... front surface of component, 60... rear surface of component, R10... radius for setting the arc shape of the right side of component.

[0096] 100...earthquake-resistant door, 110...door body, 111...left side of door body, 111a...maximum turning radius part of door body, 112...right side of door body, 113...top surface of door body, 114...bottom surface of door body, 120...door frame, 121...left side frame, 121a...inward side, 121b...door stop, 121c...airtight rubber, 122...right side frame, 123...upper frame, 123a...inward lower surface, 124...lower frame, 124a...inward upper surface, 130...hinge part, Rmax...maximum turning radius of door body, Qmax...locus of maximum turning radius.

Claims

1. A rectangular thin plate-shaped seismic door member that is attached to the door frame body to prevent the opening operation of the door body in the closed state from being hindered by the deformation of the door frame body due to an external force. The member is formed of a metal material or a ceramic material, and includes a first surface that abuts against a part of the door frame body and a second surface on the opposite side of the first surface. The distance between the first surface and the second surface that defines the plate thickness has a tapered portion formed so as to continuously decrease from the maximum thickness to the minimum thickness in the short side direction. When the door frame body is deformed and comes into pressure contact with the opposing door body, in order to prevent displacement from a predetermined mounting position along the contact surface with the door frame body, surface unevenness processing is applied to at least the first surface at the maximum plate thickness portion or in the vicinity thereof. When in pressure contact, in order to reduce the opening force for rotating the door body to open the door, a low friction layer is formed on at least the second surface at the maximum plate thickness portion or in the vicinity thereof. A seismic door member.

2. The seismic door member according to claim 1, wherein the surface unevenness processing is knurling, friction material coating, or blasting.

3. The seismic door member according to claim 1 or 2, wherein the region where the surface unevenness processing is applied to the first surface is a strip shape extending in the longitudinal direction of the seismic door member, and the width thereof is in the range of 1 / 20 to 1 / 4 of the width of the seismic door member in the short side direction.

4. The seismic door member according to claim 1 or 2, wherein the low friction layer is a baked layer containing a fluorine-based resin, a hard coat layer containing a silica component, a vapor deposition layer mainly composed of diamond-like carbon, or a surface modified layer by shot blasting of molybdenum disulfide.

5. The seismic door member according to claim 4, wherein the thickness of the baked layer is in the range of 5 to 100 μm, the thickness of the hard coat layer is in the range of 0.5 to 30 μm, the thickness of the vapor deposition layer is in the range of 0.5 to 10 μm, or the thickness of the surface modified layer is in the range of 1 to 20 μm.

6. The seismic door member according to claim 1 or 2, wherein the second surface of the tapered portion is formed in an arc shape that curves along the maximum rotation locus drawn by the rear edge portion of the side surface of the door body that rotates with the maximum rotation radius.

7. The seismic door member according to claim 1 or 2, wherein a magnet sheet for attachment and fixation is laid in a region other than the region where the surface unevenness processing is applied to the first surface.

8. A door body, a door frame body surrounding the outer peripheral edge of the door body, a hinge member rotatably connecting the door body and the door frame body so that the door body takes a closed position and an open position by being rotatable with respect to the door frame body, and a member for a seismic-resistant door according to claim 1 or 2, wherein the door frame body includes a pair of side frame bodies parallel to each other, the hinge member is connected to one of the pair of side frame bodies, and the member for a seismic-resistant door is attached to at least a part of the other, and the member for a seismic-resistant door is attached such that the maximum plate thickness portion or the vicinity thereof and the rear edge portion of the side surface of the door body that rotates with the maximum rotation radius face each other when the door body takes the closed position, and the rear edge portion of the side surface of the door body is located on or outside the maximum rotation locus drawn by the rear edge portion of the side surface of the door body, a seismic-resistant door.

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