JP2014114688A - Airtight mechanism for door lower end, door panel having airtight mechanism for door lower end, and door assembly including door panel having airtight mechanism for door lower end - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: an airtight mechanism for a door lower end, which prevents internal and external air of a door panel from circulating via a small clearance (gap) between a side wall outer surface of a movable part of the airtight mechanism for the door lower end and a side wall inner surface of a casing of the airtight mechanism for the door lower end as much as possible, and can dramatically prevent internal and external air of the door panel from circulating in comparison with a conventional case when the movable part is lowered and a lower end thereof is brought into close contact with a lower part of a door panel frame, thus keeping an airtight state; a door panel having the airtight mechanism; and a door assembly having the door panel having the airtight mechanism.SOLUTION: In order to minimize a small clearance (gap) between a side wall (14A) outer surface of a movable part (14) of the airtight mechanism for a door lower end and a side wall (12A) inner surface of a casing (12) of the airtight mechanism for the door lower end, a tape-like seal section (18) is provided at least on one outside surface of both side walls of the movable part or on one inside surface of two side walls of the casing.

Description

  The present invention relates to an airtight mechanism for a lower end of a door, and more particularly, to an improvement of an airtight mechanism having a movable portion that is attached to the lower end of a hinged door or a sliding door and moves up and down as the door is opened and closed. The present invention also relates to a door having such a door lower end airtight mechanism and a door assembly including the door having a door lower end airtight mechanism.

  In the conventional airtight mechanism for the lower end of the door (including what is called a smoke shielding mechanism), a movable part called a plunger is movable up and down by a slide mechanism, and when the door is open, the movable part When the door is closed, the lower end of the movable part is located away from the lower part of the door frame or the floor surface. When the door is closed, the movable part is moved downward by the slide mechanism, and the lower end of the movable part is the door. It has a structure in which the inside and outside of the door are kept airtight in close contact with the lower part of the frame or the floor surface.

  In the conventional airtight mechanism for the lower end of the door, the movable part that can be moved up and down by the slide mechanism is structured to move up and down in the space inside the housing of the airtight mechanism for the lower end of the door. The outer wall moves vertically along the inner wall of the casing of the airtight mechanism for the lower end of the door. Non-Patent Document 1 below shows Supertite (model number 558-1 and others), which is the best product, and Non-Patent Document 2 below shows an auto door bottom (Shibutani product). Model number DB400, etc.) is shown.

http://best.rockeys.biz/251_791.html http://www.shibutani.co.jp/products/products_pdf/p32-p33.pdf#021924

  In such a conventional airtight mechanism for the lower end of the door, in order to allow the movable part to move in the inner space of the casing of the airtight mechanism for the lower end of the door, the outer surface of the side wall of the movable part and the inner surface of the side wall of the casing of the airtight mechanism for the lower end of the door A close contact structure cannot be formed, and there is a slight gap (gap) between the outer surface of the side wall of the movable part and the inner surface of the side wall of the casing of the airtight mechanism for the lower end of the door. Therefore, even if the airtight state is maintained at the lower end of the movable portion of the door lower end airtight mechanism, there is a problem that air circulates inside and outside the door through this slight gap.

  The present invention enables air inside and outside the door to circulate through a slight gap (gap) between the outer side wall of the movable part of the airtight mechanism for the lower end of the door and the inner surface of the side wall of the casing of the airtight mechanism for the lower end of the door. As far as possible, when the movable part is lowered, the lower end of the movable part is in close contact with the lower part of the door frame and the airtight state is maintained. An object of the present invention is to provide an airtight mechanism for a lower end of a door that can be blocked. It is another object of the present invention to provide a door assembly including a door having such a door lower end airtight mechanism and a door having a door lower end airtight mechanism.

  In order to achieve the above object, in the present invention, in order to minimize the slight gap (gap) between the outer surface of the movable portion of the airtight mechanism for the lower end of the door and the inner surface of the side wall of the casing of the airtight mechanism for the lower end of the door, A tape-shaped seal portion is provided on at least one outer wall on both side surfaces of the movable portion or at least one inner wall of the two inner walls of the casing.

That is, according to the present invention, the sliding mechanism is attached to the lower end of the door, is accommodated in the internal space of the housing, and is positioned upward when the door is in the first position, and when the door is in the second position, In the airtight mechanism for the lower end of the door, which has a movable part that moves downward and comes into close contact with the lower part of the door frame or the floor surface,
An airtight mechanism for a lower end of a door is provided, wherein a tape-like seal portion is provided on at least one outer surface of both side walls of the movable portion or at least one inner surface of two side walls of the casing.

  Moreover, it is one of the preferable aspects of this invention that the said seal part consists of elastic bodies.

  Moreover, it is one of the preferable aspects of this invention that the said seal part is a single-sided tape.

  Moreover, it is one of the preferable aspects of this invention that the said seal part is provided over the full length of the said movable part or the said housing | casing.

  Moreover, according to this invention, the door which has the airtight mechanism for door lower ends of any one of said aspects is provided.

  Moreover, according to this invention, the door which has the airtight mechanism for door lower ends of the said aspect, the door frame to which the said door is attached with a hinge, and the seal | sticker attached to the three directions of the said door and / or the said door frame A door assembly having a member is provided.

  Further, according to the present invention, there is provided a door having the door lower end airtight mechanism of any one of the above aspects, a door frame to which the door is attached by a hinge, and a seal member attached to each of the three sides of the door frame. And the door assembly by which each said sealing member is attached to the said door frame in the direction which the protrusion part of the said sealing member goes to one surface of the said door is provided.

  According to the present invention, in order to minimize the slight gap (gap) between the outer side wall of the movable part of the door lower end hermetic mechanism and the inner wall of the casing of the door lower end hermetic mechanism, Since a tape-shaped seal is provided on at least one outer surface or at least one inner surface of the two side walls of the housing, the air flow inside and outside the door is extremely restricted, and the airtight effect and smoke prevention (smoke prevention) effect There is provided a door assembly including a door having an air tight mechanism for the lower end of the door, a door having an air tight mechanism for the lower end of the door, and a door having an air tight mechanism for the lower end of the door.

It is sectional drawing which shows 1st Embodiment of the airtight mechanism for door lower ends of this invention. It is sectional drawing which shows the state which the movable part (plunger) fell in 1st Embodiment of FIG. It is a perspective view which shows the door assembly containing the door with which the airtight mechanism for door lower ends shown in FIG. 1 was mounted | worn. 3B is a partially omitted cross-sectional view of the door assembly shown in FIG. 3A. FIG. FIG. 4 is a partially omitted cross-sectional view of a modified example of the door assembly shown in FIGS. 3A and 3B. FIG. 4 is a partially omitted vertical sectional view of a modification of the door assembly shown in FIGS. 3A and 3B. It is sectional drawing of the housing which comprises the airtight mechanism for door lower ends shown in FIG. It is sectional drawing which shows the state by which the tape-shaped seal part was affixed on the outer surface of the main body of the movable part (plunger) which comprises the airtight mechanism for door lower ends shown in FIG. It is sectional drawing of the upper elastic member which comprises the airtight mechanism for door lower ends shown in FIG. It is sectional drawing of the lower elastic seal member which comprises the airtight mechanism for door lower ends shown in FIG. It is sectional drawing which shows the state by which the tape-shaped seal part was affixed on the inner surface of the housing | casing in 2nd Embodiment of the airtight mechanism for door lower ends of this invention. It is a graph which shows the result of Table 1. It is a graph which shows the result of Table 2.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a first embodiment of an airtight mechanism for a lower end of a door according to the present invention. As shown in FIG. 3A, the door lower end airtight mechanism 10 is attached to the inside of a groove portion (not shown) provided at the lower end portion of the door 30. Note that the airtight mechanism for the lower end of the door of the present invention is applicable to both a swing door (swing door) and a sliding door (sliding door).

  In FIG. 1, a door lower end airtight mechanism 10 according to the first embodiment includes a housing 12 having a downward substantially U-shaped cavity (hereinafter simply referred to as a U-shaped cavity) 12G, and an interior of the U-shaped cavity 12G. In the figure, it has a plunger 14 that operates as a movable part movably attached up and down. As shown in FIG. 4, the housing 12 has two parallel side walls 12 </ b> A and 12 </ b> B that extend vertically, and an upper connection portion 12 </ b> C that connects them. The lower end of the side wall 12A has a flange 12D extending outward, and the lower end of the side wall 12B does not have a flange, and is an end portion directed downward. A plurality of through holes (not shown) are provided in the flange 12D, and the flange 12D is fixed to the lower end portion of the door 30 with bolts, wood screws, or the like through these through holes. FIG. 3A schematically shows that the flange 12D is fixed to the lower end portion of the door 30 with four screws. Note that FIG. 3A shows the interior of the door 30 that is not actually visible as if the door 30 is made of a transparent member. Inside the U-shaped cavity 12G, there are protrusions 12E and 12F extending inward so as to face each other.

  As shown in FIGS. 5, 6, and 7, the plunger 14 includes a plunger main body 14 </ b> H, an upper elastic member 16, and a lower elastic seal member 18. The plunger main body 14H has two parallel side walls 14A and 14B extending vertically and an intermediate connection portion 14C connecting them. The lower ends of the side walls 14A and 14B have protrusions 14D and 14E that extend in opposite directions. Therefore, the plunger main body 14H has a substantially H-shaped cross section, and has an upward substantially U-shaped cavity 14F in the upper part and a downward substantially U-shaped cavity 14G in the lower part. Further, as shown in FIG. 1, the upper elastic member 16 is fitted into the upward substantially U-shaped cavity 14F, and the upper part 18A of the lower elastic seal member 18 is fitted into the downward substantially U-shaped cavity 14G. .

  The upper elastic member 16 has a flat upper portion 16A and a lower portion 16B having a substantially U-shaped cross section located below the upper portion 16A. Small protrusions 16C that extend to the left and right are provided on the sides of the lower portion 16B. Silicon rubber can be used as the material of the upper elastic member 16. The upper elastic member 16 prevents an impact sound from being generated by colliding with the lower surfaces of the protrusions 12E and 12F when the door is opened and the plunger 14 is raised.

  The lower elastic seal member 18 has two bent portions 18C and 18D via a constricted portion 18B at the lower portion of the upper portion 18A. These bent portions 18C and 18D are bent so as to form a hollow substantially ellipsoid, and are arranged so that their tips overlap. As a material of the lower elastic seal member 18, silicon rubber can be used.

  As shown in FIG. 1, the plunger 14 is attached to be movable up and down in a space below the protrusions 12E and 12F in the U-shaped cavity 12G. That is, FIG. 1 shows a state in which the plunger 14 is located at the upper portion, and FIG. 2 shows a state in which the plunger 14 is lowered. As shown in FIGS. 1 and 2, in the space above the protrusions 12E and 12F in the U-shaped cavity 12G, there is a rod 20 and a rod end member 22 connected to the end of the rod 20, and the rod end When the member 22 protrudes outward in the longitudinal direction of the housing 12 from the end of the housing 12 and the door 30 is closed, the protruding rod end member 22 contacts the door frame or the like, and the rod 20 The plunger 14 is moved downward by pressing a spring mechanism (not shown). When the plunger 14 moves downward, the bent portions 18C and 18D of the lower seal member 18 come into contact with the lower portion of the door frame, and are pressed, compressed, and deformed, and the hollow shape becomes an intimate flat shape. On the other hand, when the door 30 is opened from the closed state, the rod end member 22 is released from contact with the lower portion of the door frame and the plunger 14 is moved upward by the biasing force of the spring mechanism.

  In the first embodiment of the present invention, as shown in FIG. 1, a tape-like seal portion 24 that functions as an airtight material is provided on the outer surface of one side wall of the plunger 14. The seal portion 24 is attached to the outside of the side wall of the plunger 14 over the entire length of the plunger 14. In the present embodiment, the seal portion 24 has a thickness of 1.16 mm and a width of 6 mm, and is attached to the vicinity of the outer upper end of the left side wall of the plunger 14 in FIG. As the seal portion 24, MS40 + single-sided NO5000NS, 1.16t × 6mm × 50M, which is a processed product of Inoac (Polon) + Nitto (NO5000NS) manufactured by Nitto Denko Corporation can be used. This seal portion 24 is a so-called single-sided tape, and is attached to the plunger 14 by removing the cover sheet on the side to which the adhesive is applied. Since the gap between the inner surface of the side wall 12 </ b> A of the housing 12 and the outer surface of the side wall 14 </ b> A of the plunger 14 is closed by the seal portion 24, the airtight effect can be enhanced. If double-sided tape is used instead of single-sided tape, the tape cover sheet exposed by long-term use may deteriorate due to friction, and problems such as increased friction due to the internal adhesive may occur. Therefore, single-sided tape is suitable for long-time use.

  FIG. 8 is a cross-sectional view showing a housing in the second embodiment of the air tight mechanism for the lower end of the door of the present invention and a seal portion 24A attached to the inner surface thereof. In the first embodiment, the seal portion 24 is attached to the plunger 14, but in the second embodiment, it is attached to the inner surface of the side wall 12 </ b> A of the housing 12. Also in this case, as in the first embodiment, the gap between the inner surface of the side wall 12A of the housing 12 and the outer surface of the side wall 14A of the plunger 14 is blocked by the seal portion 24A, thereby enhancing the airtight effect. Can do.

  In the above two embodiments, the seal portions 24, 24A are provided on the left side of the two gaps between the housing 12 and the plunger 14, but may be provided on the right side. Also in this case, the seal portion 24 can be attached to the outer surface of the side wall 14B of the plunger 14, or the seal portion 24A can be attached to the inner surface of the side wall 12B of the housing 12. Furthermore, the seal portions 24 and 24A can be attached to both the left and right gaps between the housing 12 and the plunger 14, respectively.

  Table 1 shows the result of the confidentiality test in the conventional airtight mechanism for the lower end of the door not provided with the seal portion 24, and Table 2 relates to the first embodiment of the present invention in which the seal portion 24 is provided. The result of the confidentiality test in the airtight mechanism for the lower end of the door is shown. These airtightness tests are based on JIS A 4702 (door set) and were conducted on June 8, 2012 at the Central Testing Laboratory, Building Materials Testing Center. In either case, a member called a packing made of silicon rubber or a seal member is used in three directions other than the lower end of the door. That is, in the door assembly 34 shown in FIG. 3A, in a configuration in which the door 30 is attached to the door frame 32 by a hinge, the seal member 26A is attached to the door end side of the door frame 32, and the seal member 26B is attached to the door frame 32. It is attached to the upper frame side, and a seal member 26C is further attached to the hanging base side of the door frame 32. 3B is a partially omitted cross-sectional view of the door assembly shown in FIG. 3A. The seal members 26A and 26B have their door contact surfaces directed toward the door frame of the door 30, and the seal member 26C has its door The contact surfaces are respectively attached to the end of the door 30 on the suspension side. The structure of these seal members 26A to 26C is common to the airtight test in Table 1 and the airtight test in Table 2. These seal members 26A to 26C are described in, for example, Utility Model Registration No. 3009482 of the applicant company. The equivalent is used. That is, as shown in FIGS. 3C and 3D to be described later, these sealing members 26A to 26C are hollow, elongated tubular members that are elastically deformed. In the example of FIG. 3A, a plurality of normal hinges are used, but a door attachment member having a form different from that of a normal hinge such as a pivot hinge or a long hinge can be used. Therefore, in the present application, the “hinge” includes the door attachment member of the above-described other form in addition to a normal hinge.

  Next, referring to FIGS. 3C and 3D, a modified example of the door assembly which is partially different from FIGS. 3A and 3B will be described. FIG. 3C is a partially omitted cross-sectional view of the modified example corresponding to the cross-sectional view of the door assembly of FIG. 3A, in which the seal members 26A and 26C are respectively attached to the door end side and the suspension base side of the door frame 32. It shows how it is. 3D is a partially omitted vertical cross-sectional view of the modified example corresponding to the vertical cross-sectional view of the door assembly of FIG. 3A, and shows a state where the seal member 26B is attached to the upper frame side of the door frame 32. Yes. Each of the seal members 26A to 26C has a flat mounting base portion and a portion that extends from both ends of the base portion and is integrated with each other to form an arc-shaped protruding portion. FIG. 3C and FIG. In the modification shown, the protrusions of the seal members 26A to 26C are attached to the door frame 32 toward the back surface rather than the one surface of the door 30, that is, the front surface shown in FIGS. 3A and 3B. Yes. As described above, when the seal members 26A to 26C are attached to the door frame 32 so as to face the same direction, when the door 30 is closed, the seal members 26A to 26C are aligned with the door frame 32 by the door 30. The airtight performance can be sufficiently exhibited.

  From the comparison of these tables, it can be seen that in each pressure difference value, the air flow rate is much smaller when the seal portion 24 is provided than when the pressure portion is not provided. . For example, when the pressure is reduced and the pressure difference is 10 Pa, the air flow rate is 1/3 or less.

  FIG. 9 is a graph showing the results of Table 1. As shown in this graph, the conventional door lower end airtight mechanism satisfies the A-3 rating line. On the other hand, FIG. 10 is a graph showing the results of Table 2. As shown in the graph of FIG. 10, the door lower end airtight mechanism of the present invention satisfies the A-4 rating line. As described above, the door bottom airtight mechanism of the present invention is one rank higher in the results of the airtight test of JIS A 4702 (door set) than the conventional door bottom airtight mechanism not provided with the seal portion 24. It was confirmed objectively that it was suitable for the line and its airtightness was significantly improved. Table 1 and Fig. 9 are included in the quality performance test report (issue number: 12A0644, issue date: June 29, 2012) issued by the Building Materials Testing Center to the applicant company. Table 2 and Figure 10 are quality performance test reports issued by the building materials testing center to the applicant company (issue number: 12A0643, issue date: June 2012). 29th). The test by the center is not open to the public, and the above report is not open to anyone other than the applicant company who is the client of the test. Is not lost.

  Since the airtight mechanism for the lower end of the door of the present invention exhibits a significantly improved airtight performance as described above, it can be applied not only to airtight doors, but also to fireproof doors, soundproof doors, door assemblies thereof, etc. Opening doors in movie theaters, various ceremonial halls, hotel banquet rooms, hotel rooms, hospitals, research facilities and factories that require clean rooms, other commercial buildings, office buildings, condominiums, public facilities, schools, general stores, general houses, etc. The present invention can be applied to sliding doors, and is therefore useful in various industries such as building material development / manufacturing and building.

DESCRIPTION OF SYMBOLS 10 Airtight mechanism for door lower ends 12 Housing | casing 12A, 12B Side wall of housing | casing 12C Connection part 12D Flange 12E, 12F Protrusion part 12G U-shaped cavity 14 Plunger (movable part)
14A, 14B Plunger side wall 14C Connection portion 14D, 14E Projection portion 14F Upward U-shaped cavity 14G Downward U-shaped cavity 14H Plunger body 16 Upper elastic member 16A Upper elastic member upper portion 16B Upper elastic member lower portion 16C Upper elastic force Projection of member 18 Lower elastic seal member 18A Upper portion of lower elastic seal member 18B Necked portion 18C, 18D Bent portion 20 Rod 22 Rod end member 24, 24A Tape-like seal portion 26A, 26B, 26C Hollow seal member 30 Door 32 Door frame 34 Door assembly

Claims (7)

The door is attached to the lower end of the door, is accommodated in the internal space of the housing, and is positioned upward when the door is in the first position, and is moved downward by the slide mechanism when the door is in the second position. In the airtight mechanism for the lower end of the door having a movable part that is in close contact with the lower part of the frame or the floor surface,
An airtight mechanism for a lower end of a door, wherein a tape-like seal portion is provided on at least one outer surface of both side walls of the movable portion or at least one inner surface of two side walls of the casing.   2. The airtight mechanism for a door lower end according to claim 1, wherein the seal portion is made of an elastic body.   The door lower end airtight mechanism according to claim 1 or 2, wherein the seal portion is a single-sided tape.   The door lower end airtight mechanism according to any one of claims 1 to 3, wherein the seal portion is provided over the entire length of the movable portion or the casing.   The door which has the airtight mechanism for door lower ends as described in any one of Claim 1 to 4.   A door having an airtight mechanism for a lower end of a door according to any one of claims 1 to 4, a door frame to which the door is attached by a hinge, and a seal attached to three sides of the door and / or the door frame A door assembly.   5. A door having an airtight mechanism for a lower end of a door according to claim 1, a door frame to which the door is attached by a hinge, and a seal member attached to each of three sides of the door frame. A door assembly in which the seal members are attached to the door frame in a direction in which the protrusions of the seal members are directed toward one surface of the door.

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