KR102745727B1 - Fire steel door having thermostat - Google Patents

Abstract

By installing a thermostat inside the door leaf of a fire door, which expands when the temperature rises in the event of a fire or during a fire resistance test and returns to its original state when the temperature drops, deformation of the fire door can be suppressed, and further, the fire door can be quickly opened and passage of people can be permitted by the thermostat that returns to its original state when the fire is over or the fire resistance test is over, and further, by fixing an expanded end of the thermostat to a thermostat fixing groove in a door frame according to a temperature rise in the event of a fire or during a fire resistance test or by increasing the thickness of the door leaf in response to the expansion of the thermostat, deformation of the fire door can be suppressed.

Description

FIRE STEEL DOOR HAVING THERMOSTAT

The present invention relates to a fire door, and more specifically, to a fire door equipped with a thermostat, in which a thermostat is installed inside a door panel of a fire door to improve fire resistance performance by suppressing deformation of the fire door in the event of a fire or during a fire resistance test.

In general, a fire door is a structure installed at an entrance or emergency exit to prevent the spread of fire in a house, apartment, factory, office, prefabricated building, etc., and is formed by a structure consisting of a square door frame installed through a wall and a door leaf connected between the door frames by a rotating means, such as a hinge or hinges.

These fire doors are mostly made of metal plates with an outer perimeter filled with insulating material to provide insulation to the door frame and door leaf.

However, when a fire occurs and the temperature in a sealed room rises, the insulation is first thermally deformed and then combusted, releasing gas, which causes expansion due to heat and pressure, and distortion occurs in areas where strength is weak.

In particular, the twisting occurs more severely on the opposite side of the hinge than on the part where the hinge is connected to the door frame. At this time, the gasket inserted inside the door leaf can frequently come off, and as a gap opens between the door frame and the door leaf, flames spread along with harmful gases, which can cause increased casualties.

To address these causes, the regulations stipulate that a 60-minute fire door must not deform or break at a high temperature of approximately 968.3℃.

In addition, with regard to the performance of fire doors, the standards for fire doors have changed from a specification system (1.5mm steel plate) → a test system → a certification system according to the changes in the times and demands. At this time, since fire doors are composed of metal materials that are highly susceptible to deformation due to heat, various methods are used to prevent deformation of fire doors in case of fire or during fire resistance tests.

Meanwhile, Fig. 1 is a drawing schematically showing a fire door reinforcement method according to conventional technology.

Referring to FIG. 1, a fire door (10) according to a conventional technique may include a door leaf (11), a door frame (12), a door lock (13), a door leaf filler (14), a gasket (15), a corner reinforcing metal (16), a fire pin (17), a door frame filler (18), and a hinge (19).

For example, conventional fire door reinforcement methods include a corner reinforcement method, an internal frame reinforcement method, a fire pin reinforcement method, a groove reinforcement method, and an insulation reinforcement method, which are specifically explained with reference to FIGS. 2 to 6.

Figure 2 is a drawing for explaining a method of reinforcing a fire door by corner reinforcement according to a conventional technique.

As shown in Fig. 2, in the case of a fire door reinforcement method using corner reinforcement according to a conventional technique, corner reinforcement hardware (16) is attached to the corner of the fire door to prevent deformation of the corner portion of the fire door, for example, a phenomenon occurring at the corner portion of the door leaf.

FIGS. 3a and 3b are drawings for explaining a method of reinforcing a fire door using an internal frame according to a conventional technique. FIG. 3a) is a photograph exemplifying an internal frame, and FIG. 3b) is a perspective view showing that a horizontal internal frame (21) and a vertical internal frame (22) are installed, respectively.

As shown in a) and b) of Fig. 3, in the case of a fire door reinforcement method using an inner frame according to the conventional technology, deformation of each side of the end of the door leaf (11) can be prevented by additionally installing a 1.2 mm inner frame as a reinforcing member thicker than the fire door steel plate of 0.6 mm or 0.8 mm.

In other words, by installing a horizontal inner frame (21) at the upper and lower ends inside the door leaf (11) and installing a vertical inner frame (22) at the left and right ends inside the door leaf (11), deformation of each side of the end of the door leaf (110) can be prevented.

Figure 4 is a drawing for explaining a method of reinforcing a fire door using a fire pin according to a conventional technique.

In the case of a fire door in which the upper and lower parts are fixed with hinges (19), as shown in Fig. 4, a fire door reinforcement method using a fire pin according to a conventional technique can use a fire pin (17a) or a fire cap (17b) between the hinges to reduce deformation in the event of a fire or during a fire resistance test.

At this time, in the case of ① a fire door with hinge-hinge, ② a fire door with hinge-fire pin/fire cap-hinge, and ③ a fire door with hinge-fire pin/fire cap-fire pin/fire cap-hinge, the amount of deformation decreases in the order of ① > ② > ③. Therefore, in case of a fire or a fire resistance test, the possibility of flames spreading to the back of the fire room can be reduced by using a fire pin (17a) or a fire cap (17b).

Figure 5 is a drawing for explaining a method of reinforcing a fire door using a bone spur according to a conventional technique.

The method of reinforcing a fire door using a mortar according to the conventional technology can prevent deformation of the entire fire door by installing various types of square pipes inside the door leaf of the fire door, as shown in Fig. 5.

FIG. 6 is a drawing for explaining a method of reinforcing a fire door using an insulating material according to a conventional technique. FIG. 6(a) shows a paper honeycomb, FIG. 6(b) shows that glass wool is inserted, and FIG. 6(c) shows that cerak wool is inserted.

Although the inexpensive paper honeycomb illustrated in a) of Fig. 6 can be installed inside the fire door, as a method of reinforcing the fire door with an insulating material according to the conventional technology, the insulating material illustrated in b) and c) of Fig. 6 can be installed inside the fire door instead of the paper honeycomb. For example, the insulating material can be mineral wool, glass wool, ceramic fiber blanket, insulating pad, etc.

Accordingly, by reducing the thermal conductivity by the insulation material, heat can be prevented from flowing into the interior of the fire door, and deformation of the entire fire door can be prevented.

Meanwhile, as a prior art related to a fire door, Korean Patent Registration No. 10-1716324 discloses an invention entitled “fire door side fixing device”, which will be described with reference to FIGS. 7a and 7b.

Fig. 7a is a side view showing a fire door having a fire door side fixing device installed according to a conventional technique, and Fig. 7b is a side view showing a state in which a fire door side fixing device according to a conventional technique is installed.

As shown in Fig. 7a, a fire door with a fire door side fixing device according to a conventional technique is composed of a door frame (40) that is installed on a wall and is made of a single frame; and a door leaf (30) that is opened and closed by being connected to a hinge of the door frame (40) on one side. At this time, considering that it is a fire door, the inside of the door frame (40) and the door leaf (30) may be filled with an insulating material having an insulating function.

Here, the P portion indicates a position where a fire door side fixing device can be installed between one side of the door frame (40) and the side of the door leaf (30) corresponding to the other side to prevent twisting between the door frame (40) and the door leaf (30).

Specifically, referring to FIG. 7b, a fire door side fixing device according to a conventional technique includes a first housing (50), a second housing (60), and a rotating drop body (70), in a fire door side fixing device that prevents twisting between a side of a door frame and a side of a door leaf corresponding to the side of the door frame.

The first housing (50) has a first space (50a) that is formed recessed in the side of the door frame (40) or door leaf (30), and a blocking plate (52) that closes the entrance side of the first space (50a) is installed.

The second housing (60) is installed on the side of the door or door frame corresponding to the side of the door frame (40) or door leaf (30), and has a second space (60a) formed sunken in at a corresponding position of the first space (50a).

The rotating drop body (70) is installed rotatably by a rotation axis (51) in the first space (50a) to enable free fall.

Accordingly, the normal blocking plate (52) is soldered to the entrance side of the first space (50a) to prevent the rotating drop body (70) from rotating, and when a fire occurs, the blocking plate (52) melts above a certain temperature, and the rotating drop body (70) rotates by its own weight and breaks through the blocking plate (52) and falls freely into the second space (60a), thereby preventing twisting between the door frame (40) and the door leaf (30).

In addition, the rotating drop body (70) includes an axial coupling portion (71) that is hooked to the rotating shaft; and an arc-shaped hook portion (72) that is bent and extended from the axial coupling portion (71) so that it is received and hooked in the second space (60a) when it falls freely due to its own weight, and is curved outwardly. A support member made of a fire-resistant rubber material that prevents damage to the rotating drop body (70) is protrudingly installed on the inner surface of the first housing (50).

According to a fire door side fixing device according to the related art, a rotating falling body which is normally accommodated inside a first housing installed so as to be sunken into the side of a door frame or door leaf is fixed by freely falling into the interior of a second housing installed so as to be sunken into the side of a door frame or door leaf when a fire occurs, as a blocking plate which has been blocking the rotation of the rotating falling body at the entrance of the first housing melts, thereby allowing the rotating falling body to be fixed by its own weight into the interior of a second housing installed so as to be sunken into the side of a door frame or door leaf, thereby preventing twisting between the door frame and the door leaf and improving fire resistance performance.

However, in the case of the side fixing device of the fire door according to the conventional technology, there is a limitation in that passage is restricted because the freely falling rotating body does not return to its original position when the fire is over.

Meanwhile, as another prior art related to a fire door frame, Korean Patent Registration No. 10-1816831 discloses an invention entitled “Door frame gasket having a temperature-expandable foam and a door frame having suitability for use as a fire door by having the same,” which will be described with reference to FIGS. 8a and 8b.

Fig. 8a is a schematic cross-sectional perspective view of a door frame gasket according to a conventional technique, and Fig. 8b is a drawing showing a state in which a door leaf of a swing door having a door frame equipped with a door frame gasket is closed. Here, the longitudinal direction is indicated by arrows z-z, the transverse direction is indicated by arrows x-x, and the longitudinal direction is indicated by arrows y-y. Therefore, the transverse direction corresponds to the thickness direction of the door frame (91).

Referring to FIGS. 8a and 8b, a door frame gasket according to a conventional technology is a door frame gasket (80) installed in a portion of a door frame (91) where the door leaf (92) of a swing door comes into contact when closed, and is configured to include a plurality of gasket bodies (81), a connecting plate (82), and a temperature-expandable foam (83).

A plurality of gasket bodies (81) are each extended in the longitudinal direction in which the door frame (91) extends and are arranged in parallel with a transverse space corresponding to the thickness direction of the door frame (91).

The connecting plate (82) has a width in the transverse direction and is extended in the longitudinal direction, and is provided between a plurality of gasket bodies (81) at a position of the first longitudinal end corresponding to one of the two longitudinal ends of the gasket body 8 (1) to connect adjacent gasket bodies (81).

The temperature-expandable foam (83) is filled in the transverse gap between the gasket bodies (81) and is made of a material that foams and expands when the temperature rises above the critical temperature.

Specifically, in the transverse gap between the gasket bodies (81) facing each other in the direction toward the second longitudinal end located opposite the first longitudinal end of the gasket body (81), a filling space is created by the inner surface of the gasket body (81) and the connecting plate (82), and the filling space is open in the direction toward the second longitudinal end of the gasket body (81).

Additionally, the filling space is filled with a temperature-expandable foam (83) that expands when the temperature rises above the expansion critical temperature.

In addition, when the temperature rises above the critical temperature and the door leaf (92) of the swing door is deformed and a gap occurs between the door leaf (92) and the door frame (91), the temperature-expandable foam (83) expands due to the elevated temperature and flows toward the second longitudinal end of the gasket body (81) and overflows out of the filling space to fill the gap between the door leaf (92) and the door frame (91) where the door frame gasket (80) was installed.

In other words, the door frame gasket (80) according to the conventional technology is installed and assembled on the door frame (91) of the swing door, and is installed so that the pressure deformation portion (84) provided on the second longitudinal end of the gasket body (81) is in close contact with the door leaf (92) when the door leaf (92) is closed. That is, the door frame gasket (80) is installed on the door frame (91) so that the open portion of the filling space created by the horizontal gap between the gasket bodies (81) and the connecting plate (82) faces the door leaf (92).

In addition, a central hollow portion (85) may be formed lengthwise inside the cross-section of the gasket body (81), and a deformation insertion projection (86) may be provided protruding on the outer surface of the gasket body (81).

According to a gasket for a door frame according to conventional technology, even if the door leaf of a swing door is deformed and a gap is created between the door leaf and the door frame due to a rise in temperature caused by a fire or the like, the temperature-expandable foam foams and fills the gap, so smoke or flames cannot pass between the door leaf and the door frame and are blocked.

In the case of door frame gaskets according to conventional technology, smoke or flame passing between the door leaf and the door frame can be blocked by providing a temperature-expandable foam, but there is a limitation in that such temperature-expandable foam does not return to its original state when a fire is over.

As mentioned above, in the case of fire doors according to conventional technology, development has been carried out in the direction of suppressing deformation of fire doors and improving insulation. However, there is a problem that it is difficult to open the fire doors when a fire is over or when a fire resistance test is completed, and the passage of people is restricted.

Republic of Korea Patent Registration No. 10-1716324 (Registration Date: March 8, 2017), Title of the Invention: "Fire Door Side Fixing Device" Korean Patent Registration No. 10-1816831 (Registration Date: January 3, 2018), Title of the Invention: "Door frame gasket with temperature-expandable foam and door frame having suitability for use as a fire door by using the same" Republic of Korea Patent Registration No. 10-2198923 (Registration Date: December 29, 2020), Title of the Invention: "Door with Ventilation Prevention Device" Japanese Patent No. 3,675,790 (Registration date: May 13, 2005), title of invention: "Fire door device" Japanese registered utility model number 2,603,391 (registration date: December 24, 1999), title of the invention: "Fire door"

The technical problem to be solved by the present invention for solving the above-mentioned problem is to provide a fire door equipped with a thermostat, which can suppress deformation of the fire door by installing a thermostat inside the door panel of the fire door, which expands when the temperature rises during a fire or fire resistance test and returns to its original state when the temperature drops.

Another technical problem to be achieved by the present invention is to provide a fire door equipped with a thermostat, which can quickly open the fire door and allow passage of people by returning it to its original state when a fire is over or a fire resistance test is completed.

Another technical problem to be achieved by the present invention is to provide a fire door equipped with a thermostat, which can suppress deformation of the fire door by fixing an expanded end of the thermostat to a thermostat fixing groove of a door frame or increasing the thickness of the door leaf in response to the expansion of the thermostat as the temperature rises.

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As another means for achieving the above-mentioned technical task, a fire door equipped with a thermostat according to the present invention comprises: a thermostat installed at a corner and the center of a door leaf, the end of which expands when the temperature rises and returns to the original position when the temperature drops; a linear member installed to be connected to the end of the thermostat and to operate as a single unit; and a thickness expansion spacer that increases the thickness of the door leaf in response to the expansion of the linear member, wherein, in case of a fire or a fire resistance test, the thickness of the door leaf increases due to the expansion of the thermostat, and as the thickness of the door leaf increases, an air layer increases inside the door leaf, thereby increasing the insulation performance.

A fire door equipped with a thermostat according to the present invention may further include a spring connected to the thickness expansion spacer to return the thickness expansion spacer to its original position when a fire is terminated or a fire resistance test is completed.

Here, the door is formed by a front plate, a rear plate, and a spacer, and the spacer is a square frame installed between the front plate and the rear plate, and forms a space inside the door, and is characterized in that a guide groove is formed so that the spring and the thickness expansion spacer can be inserted into the spacer.

According to the present invention, by installing a thermostat inside a fire door leaf that expands when the temperature rises during a fire or fire resistance test and returns to its original state when the temperature drops, deformation of the fire door can be suppressed.

According to the present invention, a fire door can be quickly opened and passage of people can be permitted by a thermostat that returns to its original state when a fire is over or a fire resistance test is completed.

According to the present invention, in case of a fire or during a fire resistance test, deformation of a fire door can be suppressed by fixing an expanded end of a thermostat to a thermostat fixing groove of a door frame according to a temperature rise or by increasing the thickness of the door leaf in response to the expansion of the thermostat.

Figure 1 is a drawing schematically showing a fire door reinforcement method according to conventional technology.
Figure 2 is a drawing for explaining a method of reinforcing a fire door by corner reinforcement according to a conventional technique.
FIGS. 3a and 3b are drawings for explaining a method of reinforcing a fire door using an internal frame according to a conventional technique.
Figure 4 is a drawing for explaining a method of reinforcing a fire door using a fire pin according to a conventional technique.
Figure 5 is a drawing for explaining a method of reinforcing a fire door using a bone spur according to a conventional technique.
Figure 6 is a drawing for explaining a method of reinforcing a fire door using insulation according to conventional technology.
Fig. 7a is a side view showing a fire door having a fire door side fixing device installed according to a conventional technique, and Fig. 7b is a side view showing a state in which a fire door side fixing device according to a conventional technique is installed.
Fig. 8a is a schematic cross-sectional perspective view of a door frame gasket according to a conventional technique, and Fig. 8b is a drawing showing a door leaf of a swing door with a door frame equipped with a door frame gasket installed in a closed state.
FIG. 9 is a perspective view showing a fire door equipped with a thermostat according to the first embodiment of the present invention.
FIG. 10 is a photograph illustrating a thermostat in a fire door equipped with a thermostat according to the first embodiment of the present invention.
FIG. 11 is a drawing specifically explaining the operation of a thermostat in a fire door equipped with a thermostat according to the first embodiment of the present invention.
FIG. 12 is a side view for explaining the operation of a fire door equipped with a thermostat according to the first embodiment of the present invention.
FIG. 13 is a perspective view showing a fire door equipped with a thermostat according to a second embodiment of the present invention.
FIG. 14 is a drawing specifically showing the expansion of a linear member by a thermostat in a fire door equipped with a thermostat according to the second embodiment of the present invention.
FIG. 15 is a side view showing a fire door equipped with a thermostat according to the second embodiment of the present invention.
FIG. 16 is a perspective view showing a fire door equipped with a thermostat according to a third embodiment of the present invention.
FIG. 17 is a perspective view illustrating that the thickness of a fire door equipped with a thermostat according to a third embodiment of the present invention increases by the thermostat.
FIGS. 18a and 18b are side views showing that the thickness of a fire door equipped with a thermostat according to a third embodiment of the present invention increases due to the thermostat.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are assigned similar drawing reference numerals throughout the specification.

Throughout the specification, whenever a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise stated.

Hereinafter, with reference to FIGS. 9 to 12, a point expansion type fire door equipped with a thermostat according to a first embodiment of the present invention will be described, with reference to FIGS. 13 to 15, a line expansion type fire door equipped with a thermostat according to a second embodiment of the present invention will be described, and with reference to FIGS. 16 to 18, a thickness increasing type fire door equipped with a thermostat according to a second embodiment of the present invention will be described.

[First embodiment: Fire door with thermostat (100)]

Figure 9 is a perspective view showing a fire door (100) equipped with a thermostat according to the first embodiment of the present invention.

Referring to FIG. 9, a fire door (100) equipped with a thermostat according to the first embodiment of the present invention is configured to include a door leaf (110), a door frame (120), and a thermostat (400). In addition, as described above, the fire door (100) equipped with a thermostat may include a door lock (130), a door leaf filler (140), a gasket (150), a corner reinforcing metal (160), a fire pin (170), a door frame filler (180), a hinge (190), etc.

The door (110) is opened and closed by being joined on one side by a hinge or hinge of the door frame. At this time, the door (110) has a front plate, a back plate, and a spacer, and a space is formed inside, and for example, a door filler (140), which is an insulating material, can be filled.

The door frame (120) is made of a single square frame and is installed on a wall. At this time, a thermostat fixing groove (121) is formed in the door frame (120), and at this time, the thermostat fixing groove (121) accommodates an end of the thermostat that expands as the temperature inside the door leaf (110) increases in the event of a fire or during a fire resistance test.

At least one thermostat (400) is installed at a predetermined point within the door (110). At this time, the thermostat (400) expands at one end in response to an increase in temperature in the event of a fire or a fire resistance test, and the expanded end is received and fixed within a thermostat fixing groove (121) formed in the door frame (120).

That is, the thermostat (400) expands in a point expansion manner at a predetermined point and its end is fixed within the thermostat fixing groove (121).

Accordingly, at each point where the thermostat (400) is installed, the amount of deformation of the door (110) corresponding to an increase in the temperature of the door (110) in the event of a fire or a fire resistance test can be reduced.

Thereafter, when the fire is over or the fire resistance test is completed, the internal temperature of the door (110) decreases, and in response, each thermostat (400) returns to its original position, thereby enabling the fire door (100) equipped with a thermostat according to the first embodiment to be opened and closed and allowing passage of people.

In other words, in normal times, the thermostat (400) is located inside the door (110), so that the fire door (100) equipped with the thermostat according to the first embodiment can be opened and closed and people can pass through it. However, in case of a fire or during a fire resistance test, the thermostat (400) installed inside the door (110) expands, and the end point (pioneer) of the expanded thermostat (400) is received and fixed in the thermostat fixing groove (121) formed in the door frame (120), thereby allowing the fire door to be closed.

Accordingly, in case of a fire or during a fire resistance test, the door leaf (110) is firmly fixed to the door frame (120) by the expansion of the thermostat (400), thereby reducing the deformation of the fire door leaf (110), and thus improving the fire resistance performance of the fire door.

Meanwhile, FIG. 10 is a photograph exemplifying a thermostat in a fire door (100) equipped with a thermostat according to the first embodiment of the present invention, and FIG. 11 is a drawing for specifically explaining the operation of the thermostat.

In the fire door (100) equipped with a thermostat according to the first embodiment of the present invention, the thermostat (400) may be a mechanical thermostat as shown in a) of FIG. 10, an electronic thermostat as shown in a) of FIG. 10, or an industrial thermostat as shown in c) of FIG. 10, but is not limited thereto.

In addition, as shown in a) of Fig. 11, in a fire door equipped with a thermostat according to the first embodiment of the present invention, the mechanical thermostat is equipped with a piston, a wax fillet, a spring, rubber, etc., so that the valve is normally kept in a closed state by the piston.

Thereafter, in case of a fire or a fire resistance test, as shown in b) of FIG. 11, as the temperature inside the door increases, the wax forcibly expands the rubber for rubber compression, the piston stops, and then the case-valve assembly is forcibly lowered to open the valve, and eventually, the end of the thermostat is received and fixed within the thermostat fixing groove (121) of the door frame (120).

Meanwhile, FIG. 12 is a side view specifically explaining the operation of a fire door (100) equipped with a thermostat according to the first embodiment of the present invention. FIG. 12(a) shows a fire door during a fire or a fire resistance test, and FIG. 12(b) shows a fire door during the end of a fire or a fire resistance test.

In the case of a fire door (100) equipped with a thermostat according to the first embodiment of the present invention, as shown in FIG. 12a), when a fire occurs or a fire resistance test is performed, the end of the thermostat (400) expands in response to a temperature rise inside the door leaf, and is received and fixed in a thermostat fixing groove (121) formed in the door frame (120), thereby suppressing deformation of the fire door (100) equipped with a thermostat according to the first embodiment.

In addition, as shown in b) of Fig. 12, when a fire is over or a fire resistance test is completed, the temperature inside the door decreases, and the end of the thermostat (400) contracts and returns to its original position, thereby releasing the fixation from the thermostat fixing groove (121). Accordingly, the fire door (100) equipped with a thermostat according to the first embodiment is opened, allowing passage of people.

Finally, according to the first embodiment of the present invention, when there is a fire or during a fire resistance test, the thermostat expands as the temperature rises, and the expanded end of the thermostat is received and fixed in the thermostat fixing groove of the door frame, thereby suppressing deformation of the fire door, and improving the fire resistance performance of the fire door.

[Example 2: Fire door with thermostat (200)]

FIG. 13 is a perspective view showing a fire door (200) equipped with a thermostat according to the second embodiment of the present invention, and FIG. 14 is a drawing specifically showing the linear member expanding by the thermostat.

Referring to FIG. 13, a fire door (200) equipped with a thermostat according to the second embodiment of the present invention is configured to include a door leaf (210), a door frame (220), a linear member (230), and a thermostat (400).

The door (210) is opened and closed by being joined on one side by a hinge or hinge of the door frame.

At this time, the door (210) has a front plate, a rear plate, and a spacer, and a space is formed inside, and for example, a door plate filler, which is an insulating material, can be filled.

The door frame (220) is made of a single square frame and is installed on a wall. At this time, in the case of the fire door (200) equipped with a thermostat according to the second embodiment of the present invention, compared to the first embodiment described above, the thermostat fixing groove (121) is not formed.

A thermostat (400) is installed at least at a predetermined point within the door (210). At this time, as shown in Fig. 14, the thermostat (400) has an end portion that expands in response to a temperature increase in the event of a fire or a fire resistance test, and the expanded end portion can expand the linear member (230) in a linear manner.

The linear member (230) is installed so as to be in close contact with the thermostat (400) on the upper and left and right sides inside the door leaf (210), and is expanded in a line-extended manner by the thermostat (400), thereby reducing the deformation of the fire door. Accordingly, the door leaf (210) is in close contact with the door frame (220) by the linear member (230) expanded in a line-extended manner, thereby suppressing deformation, and thus improving the fire resistance performance of the fire door.

In addition, the linear member (230) is connected to the end of the thermostat (400) and operates as a single unit, and when the fire is over or the fire resistance test is completed, the thermostat (400) returns to the original position together with the linear member (230) as the temperature inside the door decreases.

Meanwhile, Fig. 15 is a side view showing a fire door equipped with a thermostat according to the second embodiment of the present invention.

In the case of a fire door (200) equipped with a thermostat according to the second embodiment of the present invention, as illustrated in FIG. 15, in the event of a fire or during a fire resistance test, the thermostat (400) expands in response to a temperature rise inside the door leaf (210), and the linear member (230) expands in a line manner in response to the expansion of the thermostat (400).

Finally, according to the second embodiment of the present invention, when a fire occurs or a fire resistance test is performed, the thermostat expands as the temperature rises, and the linear member coupled to the thermostat expands in a linear manner to suppress deformation of the fire door, thereby improving the fire resistance performance of the fire door.

[Example 3: Fire door with thermostat (300)]

FIG. 16 is a perspective view showing a fire door equipped with a thermostat according to a third embodiment of the present invention, and FIG. 17 is a perspective view exemplifying that the thickness of the fire door increases due to the thermostat.

Referring to FIG. 16, a fire door (300) equipped with a thermostat according to the third embodiment of the present invention is configured to include a door leaf (310), a door frame (320), a linear member (330), a thickness expansion spacer (340), a spring (350), and a thermostat (400).

The door leaf (310) is opened and closed by being joined on one side by a hinge or hinge of the door frame. At this time, as illustrated in FIG. 18 described later, the door leaf (310) has a front plate (310a), a rear plate (310b), and a space (310c), and a space is formed inside, and for example, a door leaf filler, which is an insulating material, can be filled.

The door frame (320) is made of a single square frame and is installed on a wall. At this time, in the case of the fire door (300) equipped with a thermostat according to the third embodiment of the present invention, compared to the first embodiment described above, the thermostat fixing groove (121) is not formed.

The linear member (330) is installed to operate as a single unit by being connected to the end of the thermostat (400), and as it expands in a manner that increases the door thickness by the thermostat (400), the thickness of the door (310) is increased, thereby reducing the deformation of the fire door.

The thickness expansion spacer (340) increases the thickness of the door leaf (310) in response to the expansion of the linear member (330).

The spring (350) is connected to the thickness expansion spacer (340) so as to return the thickness expansion spacer (340) to its original position when the fire ends or the fire resistance test is completed.

The thermostat (400) is installed at the corner and center within the door (310). At this time, as shown in Fig. 17, the thermostat (400) expands at one end in response to an increase in temperature during a fire or fire resistance test, and the expanded end can expand the linear member (330) in a linear manner.

Accordingly, the thickness of the door leaf (310) increases by expanding the thickness expansion spacer (340) inserted between the spacers of the door leaf (310), thereby improving the fire resistance performance of the fire door.

For example, the thermostat (400) is installed in the direction in which the door thickness (or door width) expands, and as shown in FIG. 16, the door thickness (door width) is maintained at 40 mm in normal times, but in case of a fire or a fire resistance test, the door thickness (door width) is increased to 80 mm, as shown in FIG. 17.

Meanwhile, FIGS. 18a and 18b are side views showing that the thickness of a fire door equipped with a thermostat according to the third embodiment of the present invention increases due to the thermostat. FIG. 18a) is a side view showing that the thickness of the fire door is maintained constant under normal conditions, and FIG. 18b) is a side view showing that the thickness of the fire door increases due to the thermostat in case of a fire or a fire resistance test.

As shown in a) of Fig. 18, the door (310) is formed of a front plate (310a), a rear plate (310b), and a spacer (310c), and the spacer (310c) is a square frame installed between the front plate (310a) and the rear plate (310b) to form a space inside the door.

Additionally, the spacer (310c) is formed with a guide groove so that the spring (350) and the thickness expansion spacer (340) can be inserted.

Therefore, in normal times, as shown in a) of FIG. 18, the spring (350) and the thickness expansion spacer (340) are maintained in a state of being inserted into the groove formed in the spacer (310c).

Thereafter, in case of a fire or a fire resistance test, as shown in b) of FIG. 18, the thermostat (400) expands in response to a temperature rise inside the door, and the linear member (330) coupled to the thermostat (400) expands to expand the rear panel (310b) of the door (310).

Accordingly, the thickness expansion spacer (340) integrally formed on both ends of the rear panel (31b) expands to increase the thickness of the door leaf (310). Thereafter, when the fire is over or the fire resistance test is completed, when the thermostat (400) returns to its original position, the rear panel (310b) returns to its original position by the spring (350) connected to the thickness expansion spacer (340), and as a result, the thickness of the fire door leaf returns to its original state.

In the case of a fire door (300) equipped with a thermostat according to the third embodiment of the present invention, compared to the first embodiment described above, a thermostat fixing groove in the door frame is unnecessary, and furthermore, in case of a fire or a fire resistance test, as the thickness of the door increases, the insulation effect is enhanced due to an increase in the air layer inside the door, and accordingly, deformation of the door can be reduced in case of a fire or a fire resistance test, and accordingly, the fire resistance performance of the fire door can be improved.

According to the third embodiment of the present invention, deformation of a fire door can be suppressed by increasing the thickness of the door leaf in response to expansion of the thermostat due to a temperature rise in the event of a fire or during a fire resistance test.

Finally, according to embodiments of the present invention, by installing a thermostat that expands when the temperature rises during a fire or a fire resistance test and returns to its original state when the temperature drops within the door leaf of the fire door, deformation of the fire door can be suppressed. In addition, by the thermostat that returns to its original state when the fire ends or the fire resistance test ends, the fire door can be quickly opened and passage of people can be permitted.

The above description of the present invention is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential characteristics of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single component may be implemented in a distributed manner, and likewise, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

100: Fire door with thermostat (first embodiment)
110: Door 120: Door frame
121: Thermostat fixing groove
200: Fire door with thermostat (second embodiment)
210: Door 220: Door frame
230: Linear Absence
300: Fire door with thermostat (3rd embodiment)
310: Door 310a: Front panel
310b: Back plate 310c: Spacer
320: Door frame 330: Linear member
340: Thickness expansion spacer 350: Spring
400: Thermostat

Claims (11)

delete delete delete delete delete delete delete A thermostat (400) installed at a corner and center within a door (310) and having an end that expands when the temperature rises and returns to the original position when the temperature drops; a linear member (330) installed to operate integrally by being connected to an end of the thermostat (400); and a thickness expansion spacer (340) that increases the thickness of the door (310) in response to the expansion of the linear member (330).
A fire door equipped with a thermostat characterized in that deformation of the fire door is suppressed, wherein, in case of a fire or a fire resistance test, the thickness of the door leaf (310) increases due to the expansion of the thermostat (400), and as the thickness of the door leaf (310) increases, the air layer inside the door leaf (310) increases, thereby increasing the insulation performance. In Article 8,
At the end of the fire or at the end of the fire resistance test,
A fire door having a thermostat further comprising a spring (350) connected to the thickness expansion spacer (340) to return the thickness expansion spacer (340) to its original position. In Article 9,
The above door (310) is
A fire door equipped with a thermostat, which is formed by a front plate (310a), a rear plate (310b), and a spacer (310c), wherein the spacer (310c) is a square frame installed between the front plate (310a) and the rear plate (310b), and forms a space inside the door, and a guide groove is formed in the spacer (310c) so that the spring (350) and the thickness expansion spacer (340) can be inserted. In Article 8,
At the end of the fire or at the end of the fire resistance test,
A fire door equipped with a thermostat, characterized in that when the internal temperature of the door (310) decreases, each thermostat (400) returns to its original position in response to this, so that the fire door can be opened and closed and people can pass through.