Door sealing device

Abstract

To obtain excellent light shielding and soundproofing properties by firmly adhering a sealing material to a floor surface even if the floor surface below a door is inclined.SOLUTION: A door sealing device comprises: an outer case 1 fixed along a lower edge of a door; and an inner case 2 and a sealing material 3 moving up and down relative thereto. The outer case 1 is provided with a retractable element 4 and a rod 5 interlocking therewith. An inner case moving mechanism 10 interposed between the rod 5 and the inner case 2 comprises: a first link member 11 swinging with respect to the outer case 1 as the rod 5 slides; a second link member 12 swinging with respect to the first link member 11; and biasing means 13 for biasing the second link member 12 against the pushing force with respect to the first link member 11. When the door is closed, the biasing means 13 repels and the sealing material 3 is pressed against a floor surface over its entire length in an inclined state.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a door sealing device that seals a gap that occurs between a door and a floor surface or the like when the door is closed. [Background technology]

[0002] As shown in Figure 7, with the advancement of barrier-free access, the door frame 51 of a swing door 50 used to open and close an entrance is generally made up of only a pair of vertical frames 51a, 51b and an upper frame 51c, and does not have a lower frame called a door sill that protrudes from the floor surface 52.

[0003] However, if the door frame 51 does not have a bottom frame, when the door 50 is closed, a gap will open between the bottom edge of the door 50 and the floor 52, which often results in light and sound leakage. To prevent such light and sound leakage, a sealing device S is sometimes attached to the bottom of the door 50.

[0004] As an example of such a sealing device S, the present applicant has proposed a sealing device S2 as shown in FIG. 8 (see Patent Document 1 below).

[0005] This sealing device S2 comprises an outer case 61 fixed along the bottom edge of the door 50, an inner case 62 that moves up and down relative to the outer case 61, and a rubber sealing material 63 attached to the inner case 62. The outer case 61 has a retractable element 64 that protrudes and retracts from one end of the outer case 61, and a rod 65 that extends from the retractable element 64 to the other end of the outer case 61 and slides in conjunction with the retractable element 64 in the lengthwise direction of the bottom edge of the door 50.

[0006] Between the rod 65 and the inner case 62, inner case moving mechanisms 66 are interposed at two locations spaced apart in the longitudinal direction of the lower side of the door 50, for converting the sliding of the rod 65 accompanying the appearance and retraction of the retractable element 64 into the lifting and lowering movement of the inner case 62.

[0007] The inner case moving mechanism 66 is composed of a triangular plate-shaped oscillating body 67 rotatably connected to the rod 65 and the outer case 61 via axes 66a and 66b, respectively, and a rod-shaped bracket 68 whose one end is rotatably connected to the oscillating body 67 via axis 66c and whose other end is fixed to the inner case 62.

[0008] In such a sealing device S2, when the door 50 is open, the retractable member 64 protrudes and the rod 65 is positioned at one end of the outer case 61, and the inner case 62 and the sealing material 63 are held in an elevated position relative to the outer case 61.

[0009] When the door 50 is closed, the retractable member 64 is pushed in as it abuts against the vertical frame 51a of the door frame 51, the rod 65 slides to the other end of the outer case 61, the inner case 62 and the sealing material 63 descend relative to the outer case 61, and the gap between the door 50 and the floor surface 52 is sealed. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Patent Publication No. 2021-25294 Summary of the Invention [Problem to be solved by the invention]

[0011] However, in the above-mentioned sealing device S2, the inner case 62 and the sealing material 63 only descend parallel to the outer case 61, and if the floor surface 52 is inclined in the longitudinal direction of the lower edge of the door 50 in the closed state, the sealing material 63 will not adhere sufficiently to the floor surface 52, which may impair the light-blocking and soundproofing properties.

[0012] Therefore, this problem is addressed by increasing the amount of descent of the sealing material 63 by adjusting the amount of protrusion of the retractable part 64 from the outer case 61, but increasing the amount of descent of the sealing material 63 increases the resistance when closing the door 50, making it difficult to close the door 50.

[0013] Therefore, this invention aims to provide a door sealing device in which the sealing material adheres firmly to the floor surface, etc., even if the floor surface, etc., below the door is inclined, thereby achieving excellent light-blocking and soundproofing properties, and preventing significant increase in resistance when closing the door. [Means for solving the problem]

[0014] In order to solve the above problems, the present invention provides a door lock system comprising an outer case fixed along one side of a door, an inner case inserted into the outer case and protruding from and receding from the surface facing the one side of the door as the door is opened and closed, and a sealant attached to the inner case to seal a gap between the one side of the door and the surface facing it when the door is closed, The outer case has a retractable element that protrudes and retracts at one end thereof, and a rod that slides in the length direction of the outer case in conjunction with the retractable element, and a plurality of inner case movement mechanisms that convert the sliding of the rod into retractable and protruding movement of the inner case are interposed in the length direction of the outer case, The inner case moving mechanism is provided to be composed of a first link member that swings relative to the outer case as the rod slides, a second link member that swings relative to the first link member, and a biasing means that biases the second link member against the first link member against the pushing force acting through the sealing material and the inner case when the door is closed.

[0015] Furthermore, a torsion coil spring is used as the second link member and the biasing means, and one arm portion extending from the coil portion of the torsion coil spring is engaged with the first link member, and the other arm portion constitutes the second link member.

[0016] Furthermore, the coil portion of the torsion coil spring, which is the biasing means, rotatably connects the outer case and the first link member, and is supported by an axis that rotatably connects the first link member and the second link member.

[0017] Furthermore, even in the normal state where no pushing force is acting from the sealing material and the inner case, the torsion coil spring, which is the biasing means, is in a stressed state when the one arm portion and the other arm portion are in a bent state and come into contact with the angle regulating portion of the first link member. [Effects of the Invention]

[0018] In the door sealing device of this invention, an inner case moving mechanism equipped with a biasing means for biasing the second link member against the first link member against a pushing force from the floor surface or the like is interposed between the rod of the outer case and the inner case. Therefore, even if the floor surface or the like below the door is inclined, when the door is closed, the sealing material adheres firmly to the floor surface along its entire length due to the repulsion of the biasing means, thereby providing excellent light-blocking and soundproofing properties and preventing significantly increased resistance when closing the door. [Brief explanation of the drawings]

[0019] [Figure 1] 1A is a longitudinal front view and a side view of a door seal device according to the present invention, showing a state in which a seal material is raised from a floor surface; FIG. 1B is a longitudinal front view and a side view of a state in which the seal material is pressed against a horizontal floor surface; [Figure 2] FIG. 1A is a partially cutaway front view of the inner case movement mechanism of the same, showing a state in which the sealing material is normally lowered, and FIG. 1B is a partially cutaway front view showing a state in which the torsion coil spring is in a rebound state. [Figure 3] FIG. 10 is a longitudinal front view showing the state in which the sealing material is pressed against an inclined floor surface. [Figure 4] 1A is a longitudinal front view showing a state in which the sealing material is raised, and FIG. 1B is a longitudinal front view showing a state in which the sealing material is lowered, in the case where the inner case moving mechanism of the same is composed only of a torsion coil spring. [Figure 5] FIG. 10 is a longitudinal sectional front view showing an example of a configuration in which the first link member and the second link member of the inner case movement mechanism are rigid bodies and the biasing means is a tension coil spring; [Figure 6]FIG. 10 is a longitudinal sectional front view showing an example of a configuration in which the swing shaft of the first link member and the swing shaft of the second link member of the inner case movement mechanism are misaligned; [Figure 7] 1 is a perspective view showing a state in which a conventional sealing device and a sealing device according to the present invention are attached to a door; [Figure 8] 1A is a longitudinal front view of a sealing device described in Patent Document 1, showing a state in which a sealing material is raised from a floor surface; FIG. 1B is a longitudinal front view of a sealing device described in Patent Document 1, showing a state in which the sealing material is pressed against the floor surface; DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0021] The sealing device S1 according to the embodiment of the present invention is attached to the bottom of a door 50, which is a hinged door, as shown in FIG. 7, similar to the conventional device.

[0022] As shown in Figure 1, this sealing device S1 comprises an outer case 1 fixed along the bottom edge of the door 50, an inner case 2 inserted into the outer case 1 and raised and lowered relative to the floor surface 52, and a rubber sealing material 3 attached to the inner case 2.

[0023] A retractable element 4 that retracts into and out of the end face is provided on one end of the outer case 1, which is the hinge side of the door 50. A rod 5 that extends from the retractable element 4 to the other end of the outer case 1 is provided in the upper space inside the outer case 1 so as to be slidable in the length direction of the lower side of the door 50.

[0024] The retractable element 4 is a cylindrical member 4a having a female thread formed on the inner periphery and an end cap 4b fitted onto the tip of the cylindrical member 4a.

[0025] Rod 5 is made up of a front shaft member 5a on the retractable element 4 side, and a joint bar 5b and rear shaft member 5c located on the extension line of the front shaft member 5a, connected in series. Round rod-shaped front shaft member 5a and rear shaft member 5c are prevented from rotating relative to outer case 1 by square rod-shaped joint bar 5b that slides against the inner surfaces of the top wall and both side walls of outer case 1.

[0026] The cylindrical member 4a of the retractable element 4 has a female thread on its inner periphery that is threaded into a male thread formed on the outer periphery of the tip side of the front barrel member 5a, and moves back and forth in the axial direction as it rotates relative to the front barrel member 5a, allowing the amount of protrusion of the retractable element 4 from the outer case 1 to be adjusted.

[0027] A rotation-preventing piece 6 and a rotation-preventing coil spring 7 that presses the piece against the cylindrical member 4a are fitted to the front barrel member 5a, and the convex portion of the rotation-preventing piece 6 engages with the concave portion of the cylindrical member 4a, preventing the cylindrical member 4a from rotating at a predetermined position.

[0028] A fixed seat 8 is fixed to the inside upper part of the end of the outer case 1 on the door leading side of the door 50, and an operating coil spring 9 provided between the joint bar 5b and the fixed seat 8 urges the retractable element 4 in the direction of protruding from one end of the outer case 1.

[0029] Between the rod 5 and the inner case 2, an inner case moving mechanism 10 that converts the sliding of the rod 5 into the lifting and lowering movement of the inner case 2 is arranged at two locations spaced apart in the longitudinal direction of the lower side of the door 50.

[0030] As shown in FIG. 2, the inner case moving mechanism 10 is made up of a first link member 11 which is a semicircular rigid body when viewed from the front, a second link member 12, and a torsion coil spring which functions as a biasing means 13.

[0031] The outer periphery of the first link member 11 is rotatably connected to the joint bar 5b via a shaft 10a that slides inside an elongated hole formed in the joint bar 5b of the rod 5, and the center side of the first link member 11 is rotatably connected to the outer case 1 via a shaft 10b. This allows the first link member 11 to swing relative to the outer case 1. The outer periphery of the first link member 11 is one end, and the center side is the other end.

[0032] The second link member 12 has one end rotatably connected to the first link member 11 and the other end rotatably connected to the inner case 2 via the shaft 10c, and swings up and down relative to the first link member 11.

[0033] The biasing means 13 has one arm portion 13b extending from the coil portion 13a which is engaged with the first link member 11, and the other arm portion 13c which constitutes the second link member 12. When the door 50 is closed, the base of the arm portion 13c bends against the pushing force acting through the sealing material 3 and the inner case 2, and stress acts on the winding of the coil portion 13a, thereby exerting a biasing force on the second link member 12 relative to the first link member 11.

[0034] Here, the shaft 10b is used to connect the outer case 1 and the first link member 11, to connect the first link member 11 and the second link member 12, and to support the coil portion 13a of the torsion coil spring, thereby simplifying the structure and reducing the number of parts.

[0035] Furthermore, even in a normal state where no pushing force is applied from the sealing material 3 and the inner case 2, the torsion coil spring serving as the biasing means 13 is in a stressed state as one arm portion 13b and the other arm portion 13c are in a bent state and come into contact with the angle restricting portions 11a and 11b of the first link member 11. This absorbs variations in the biasing force of the torsion coil spring.

[0036] In the sealing device S1 as described above, when the door 50 is open, as shown in Figure 1(a), the retractable element 4 protrudes and the rod 5 is positioned at one end side of the outer case 1 (the hanging side of the door 50), and the inner case 2 and the sealing material 3 are held in an elevated position relative to the outer case 1.

[0037] 1(b), when the door 50 is closed, the retractable element 4 is pushed in as it abuts against the vertical frame 51a of the door frame 51, the rod 5 slides to the other end of the outer case 1 (the leading edge of the door 50), and the inner case 2 and the sealing material 3 descend relative to the outer case 1. At this time, if the floor surface 52 is horizontal, different pushing forces will not act on the biasing means 13 of the inner case movement mechanism 10 at two locations, and the sealing material 3 will come into close contact with the floor surface 52 over its entire length.

[0038] On the other hand, as shown in Figure 3, if the floor surface 52 is inclined (for example, as shown in the figure, if the distance B between the lower end of the door 50 on the door tip side and the floor surface 52 is larger than the distance A between the lower end of the door 50 on the hanging side and the floor surface 52), when the door 50 is closed, the biasing means 13 of the inner case moving mechanism 10 repels in accordance with the inclination of the floor surface 52, and the sealing material 3, together with the inner case 2, is pressed against the floor surface 52 over its entire length while being inclined relative to the outer case 1.

[0039] This allows the elastic sealing material 3 to adhere firmly to the inclined floor surface 52, providing excellent light-blocking and soundproofing properties.

[0040] Furthermore, there is no need to adjust the amount of protrusion of the retractable element 4 to increase the amount of descent of the sealing material 3, and the resistance when closing the door 50 does not increase significantly.

[0041] In the above embodiment, the inner case moving mechanism 10 is exemplified as one in which the first link member 11 is a semicircular rigid body and the second link member 12 is composed of the arm portion 13c of a torsion coil spring which is the biasing means 13, but the inner case moving mechanism 10 is not limited to this and can have various configurations.

[0042] For example, as shown in FIG. 4, the first link member 11 may be configured with one arm portion 13b of a torsion coil spring, and the second link member 12 may be configured with the other arm portion 13c of a torsion coil spring.

[0043] As shown in FIG. 5, the first link member 11 and the second link member 12 may be made of rod-shaped rigid bodies, and the biasing means 13 may be made of a tension coil spring.

[0044] Furthermore, in the above embodiment, the pivot axis of the first link member 11 and the pivot axis of the second link member 12 are both axis 10b and coincident with each other. However, as shown in FIG. 6, the pivot axis of the first link member 11, axis 10b1, and the pivot axis of the second link member 12, axis 10b2, may be different axes that are arranged offset from each other.

[0045] In the above embodiment, as shown in Figure 7, it is assumed that a recess that opens into the end surface of the lower edge of the door 50 is formed and the sealing device S1 is fitted into that recess, but such a sealing device S1 may also be attached in a manner that exposes it from the surface on one side of the lower part of the door 50.

[0046] In addition, in the above embodiment, the retractable element 4 of the sealing device S1 is located on the hinge side of the door 50 and is configured to abut against the vertical frame 51a of the door frame 51, but it may also be configured to abut against the vertical frame 51b on the door edge side of the door 50. In this case, the shape of the end cap 4b may be made triangular at the tip, for example, like the latch of a case lock.

[0047] Furthermore, in the above embodiment, an example in which the sealing device is disposed on the lower side of the door 50 is disclosed, but the present invention is not limited to this, and can also be applied to the upper side or vertical frame of the door 50.

[0048] Furthermore, in the above embodiment, a hinged door is used as the door 50, but the present invention is not limited to this and can also be applied to a sliding door. [Explanation of symbols]

[0049] S1 sealing device 1 outer case 2 Inner case 3. Sealing material 4. Haunted Child 4a Cylindrical member 4b End cap 5 rods 5a Tip shaft member 5b Joint Bar 5c Rear shaft member 6 Anti-rotation piece 7 Anti-rotation coil spring 8 Fixed seat 9. Operating coil spring 10 Inner case movement mechanism 10a,10b,10c axis 10b 1, 10b2 axis 11 First link member 11a,11b Angle regulating part 12 Second link member 13. Actuation means 13a Coil section 13b, 13c Arm section 50 doors 51 Door Frame 51a,51b vertical frame 51c upper frame 52 Floor

Claims

1. The device comprises an outer case (1) fixed along one side of the door, an inner case (2) inserted into the outer case (1) and protruding from and retracting from the opposing surface of the door side as the door is opened and closed, and a sealant (3) attached to the inner case (2) for sealing a gap between the door side and the opposing surface when the door is closed. The outer case (1) has a retractable element (4) that protrudes and retracts at one end thereof, and a rod (5) that slides in the length direction of the outer case (1) in conjunction with the retractable element (4), and a plurality of inner case movement mechanisms (10) that convert the sliding of the rod (5) into retractable movement of the inner case (2) are interposed in the length direction of the outer case (1), in a door sealing device, The inner case moving mechanism (10) comprises a first link member (11) that swings relative to the outer case (1) as the rod (5) slides, a second link member (12) that swings relative to the first link member (11), and a biasing means (13) that biases the second link member (12) relative to the first link member (11) against a pushing force acting via the seal material (3) and the inner case (2) when the door is closed, A torsion coil spring is used as the second link member (12) and the biasing means (13), and one arm portion (13b) extending from a coil portion (13a) of the torsion coil spring is engaged with the first link member (11), and the other arm portion (13c) constitutes the second link member (12); The torsion coil spring, which is the biasing means (13), is in a stressed state when the one arm portion (13b) and the other arm portion (13c) are in a bent state and abut against the angle regulating portions (11a, 11b) of the first link member (11), even in a normal state where no pushing force is acting from the sealing material (3) and the inner case (2).

2. The door seal device according to claim 1, characterized in that the coil portion (13a) of the torsion coil spring, which is the biasing means (13), rotatably connects the outer case (1) and the first link member (11) and is supported by a shaft (10b) that rotatably connects the first link member (11) and the second link member (12).

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