JPH08170473A - Door closing device - Google Patents

Abstract

PURPOSE: To allow a door to be closed airtightly without providing a sill or the like with step difference by forming a door closing device of a casing fitted along the lower edge of the door, an operating rod, arms and a seal member. CONSTITUTION: An operating rod 2 is slidably supported in a casing 1, a long- sized member fitted along the lower edge of a door, and the pressing part 3 of the operating rod 2 in the protruding state from the side face of the door is retreated being pushed by a door frame by the closing of the door. The variable length part 4 of the operating rod 2 is then compressed, and a support pin 7 is advanced downward by two arms 5, 6 so as to press a seal member 10 to a sill or the floor face. The door can thereby be closed airtightly without providing the sill or the like with step difference.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closing device.
More specifically, the present invention relates to a door sealing device that is attached along the lower edge of a door and that can close the door by closing a gap with a sill or a floor.

[0002]

2. Description of the Related Art Normally, as shown in FIG. 8, when a door D is closed, a gap G1 is formed between a lower edge D1 and a sill S (or a floor surface) and above and to the side of the door D. G2
Is formed. Such gaps G1 and G2 are necessary to smoothly open and close the door D, but since draft air enters, a gap G2 above and to the side of the door D is provided by providing the frame member F and the like. Is blocked.

[0003]

However, the gap G1 formed below the door D is stumbling and dangerous if a step is formed on the sill S, so that it cannot be closed with a frame member or the like. .

Further, even if the frame member is used to prevent the entry of draft, it is not possible to ensure sufficient airtightness, so that there is a problem that the heat insulation in the room cannot be effectively performed.

In view of the above circumstances, it is an object of the present invention to provide a door sealing device which can close a door with good airtightness without providing a step on a threshold or the like.

[0006]

A door closing device according to the present invention comprises: (a) a casing having a substantially U-shaped cross-section that is opened downward, and a casing (b) mounted along the lower edge of the door. ) A rod-shaped body having one end fixed in the casing and the other end forming a pressing portion protruding from the side surface of the door, the pressing portion protruding from the side surface of the door at the fixed one end side. Operation rod having a variable length portion biased to maintain the above state, and (c) one end of each is rotatably connected to the operation rod across the variable length portion, and the other ends rotate. Two arms that are freely connected to each other to form a support point, and (d) a seal member that is rotatably connected to the support points formed by the two arms and that is housed in the casing so as to project downward. It is characterized by consisting of.

[0007]

In the door sealing device of the present invention, the operating rod is slidably supported in the casing mounted along the lower edge of the door, and the operating rod is pushed out from the side surface of the door. The part is pushed by the door frame when the door is closed and retracts. This shortens the variable length part of the operating rod,
The supporting points of the two arms are advanced downward, and the sealing member is projected. The protruding sealing member fills the gap between the sill or the floor.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A door closing device of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective sectional view showing an embodiment of a door sealing device of the present invention, FIG. 2 is a front view showing a door opened, and FIG. 3 is a front view showing a door closed. . Further, FIGS. 4 and 5 show an example of a mounted state of the door sealing device of FIG. 1, particularly FIG. 4 is a perspective explanatory view when the door is open, and FIG. 5 is a perspective view when the door is closed. FIG. 6 is a perspective explanatory view showing another example of a mounted state of the door sealing device of FIG. 1, and FIG. 7 is a perspective explanatory view showing a used state.

In FIG. 1, 1 is a casing, 2 is an operating rod having a pressing portion 3 and a variable length portion 4, 5 and 6 are a first arm and a second arm, respectively, 7 is a support pin, and 10 is a sealing member. . It should be noted that reference numerals 8 and 9 denote connecting portions of the first arm 5 and the second arm 6, respectively, and guide members for supporting the support rod 2 in the casing 1. In the claims, the “side surface of the door” means a surface that can face D2 (or D3) in FIG. 7, that is, the side surface F1 (or F2) of the door frame.

The casing 1 is a long member made of a metal such as aluminum or stainless steel, or a synthetic resin, and has a substantially U-shaped cross section opened downward. The length in the longitudinal direction is approximately equal to the width of the door D to be attached, as shown in FIGS. 4 and 5, and the thickness T1 is equal to the door D.
Is smaller than the thickness T2 of the door D and is preferably embedded in the lower edge D1 of the door D. However, if it is installed after construction,
Alternatively, if the thickness T2 of the door D is thin, as shown in FIG. 6, the front side (or the back side) of the lower edge D1 of the door D is shown.
It can also be attached to. In addition to screwing,
It can be attached.

A pair of projections 1a are provided in the casing 1 in the shape of rails inside the casing 1, and guide members 8 and 9 are provided.
Is inserted into a rectangular space 1c formed by the rail-shaped protrusion 1a and the back portion 1b of the casing 1. As a result, the operating rod 2 can be mounted by being inserted from the end of the casing 1 and can be slid.

The seal member 10 includes a seal portion 11 made of an elastic material such as synthetic rubber or natural rubber,
Metals such as aluminum and stainless steel, or synthetic resins,
The support portion 12 is made of a material having rigidity. As shown in FIG. 1, the supporting portion 12 has a lower end 12a having a downward C-shaped cross section so as to grip the neck portion 11a formed on the seal portion 11,
The point that the seal part 11 can be replaced, and the seal part 11
Is preferable because it is firmly fixed to the support portion 12.
However, the seal portion 11 can be fixed to the support portion 12 by sticking, screwing, or the like, and these methods may be used together.

The length of the support portion 12 in the longitudinal direction is equal to the length of the casing 1. The length of the seal portion 11 in the longitudinal direction is slightly larger than that of the casing 1, and as shown in FIG. 2, both of the end portions 11 b are the end portions 1 of the casing 1.
It extends beyond a. The end portion 11b of the seal portion 11 abuts on both side surfaces F1 and F2 (see FIG. 7) of the door frame to further enhance the hermeticity of the door.

The operating rod 2 has a pressing portion 3 formed on the tip end side of rod-shaped main bodies 13 and 14, and has a variable length portion 4 whose length can be changed on the distal end side. Further, the guide member 8 provided on the terminal side is fixed in the casing 1 by a screw or the like, and the guide member 9 is provided substantially at the center so as to sandwich the variable length portion 4 therebetween. Guide member 9
Can slide in the casing 1, and the variable length portion 4
The length of can be changed. The main bodies 13 and 14 are threaded as a whole.
It is preferable for forming or connecting 4, 8, and 9 at appropriate positions, and the position can be easily adjusted. However, the same effect can be obtained by screwing only both ends of the main bodies 13 and 14.

The cross section of the guide members 8 and 9 perpendicular to the axial direction of the operating rod 2 has a rectangular space 1c formed by the casing 1.
And is a little smaller than the space 1c, and can slide in the rectangular space 1c in the longitudinal direction. Further, as shown in FIG. 2, the guide members 8 and 9 rotatably support the first arm 5 and the second arm 6 therein.

The operating rod 2 is connected to the seal member 10 by a support pin 7 via a first arm 5 and a second arm 6. Then, the seal member 10 is attached to the support portion 12 thereof.
When the casing 1 is housed in the casing 1 so that the end portion of the casing 1 and the end portion 1a of the casing 1 are aligned with each other, the pressing portion 3 of the operation rod 2 has an appropriate amount (for example, about 3 to 15 mm).
project from a.

In the embodiment shown in FIG. 7, the pressing portion 3 is
Although it is provided so as to project from the side surface D2 on the side where the hinge 31 is provided, it may be provided so as to project from the side surface D3 on the open side. However, it is preferable to be provided on the side surface D2 side because it can be surely pushed into the casing. Further, the tip of the pressing portion 3 is pushed from the side surface F1 of the door frame in an oblique direction in the process of closing the door D, so that it is preferable to make it a curved surface. Furthermore, the pressing portion 3
May be formed integrally with the main body 13, or may be formed separately and fixed. In that case, the amount of protrusion can be easily adjusted by fixing with screws. Further, by providing the spring 30 (see FIG. 2), it is possible to prevent the pressing portion 3 from loosening and to keep the set protrusion amount constant.

As shown in FIG. 2, the variable length portion 4 of the operating rod 2 comprises a cylindrical body 21, a rod body 22, a spring 23, and a nut 24 for fixing the spring 23. Cylindrical body 21
The rod 22 and the end portion 14a of the main body 14 are inserted into the inside of the. The axial length of the cylindrical body 21 is the length L of the variable length portion 4.
The length of the two arms 5 and 6 may be shorter than that of the first arm by at least the length required to project the seal member 10 by an appropriate amount. For example, the first
The lengths of the arm 5 and the second arm 6 are both 200 to
When the length is 300 mm, the variation amount of the variable length portion 4 is 10 to 1
It is 5 mm, and the seal member 10 can be advanced about 20 to 30 mm.

A spring 23 is provided on the outer circumference of the cylindrical body 21. The spring 23 is fitted between the nut 24 and the guide member 8 in a natural length or in a slightly compressed state, so that the variable length portion 4 is long, that is, the pressing portion 3 protrudes by a predetermined amount. It can be maintained. When the door D is closed and the pressing portion 3 is pressed by the door frame or the wall, the variable length portion 4 is compressed to the length L2 as shown in FIG. However, when the door D is opened, the length of the variable length portion 4 is restored to L1 by the urging force of the spring 23, and the pressing portion 3
Again projects from the side surface D2 (see FIG. 7) of the door D. The biasing force of the spring 23 can be adjusted by changing the position of the nut 24.

Incidentally, in FIG. 3, a gap G3 is provided between the seal portion 11 and the casing 1 in a state where the seal portion 11 is advanced so that the structure can be easily understood. The amount of advance is small as described above (see FIG. 5), and the gap G3 is not formed in this way.

As shown in FIG. 3, the first and second arms 5 and 6 are housed in a groove 12b formed above the supporting portion 12 of the seal member 10. Then, the respective end portions are rotatably connected to each other by the support pin 7 to form a support point referred to in the claims.

Further, the support pin 7 is supported by the both walls of the groove 12b so as to sandwich the ends of the two arms at approximately the center of the groove 12b (approximately the center of the seal member 10). The support pin 7 rotatably supports the seal member 10. Therefore, even if there is a wide space or a narrow space in the gap between the sill or the floor, it is possible to reliably seal the space.

In the present invention, the variable length section 4 is shortened to
The crossing angle of the first arm 5 and the second arm 6 is made small, and the support pin 7 is advanced. Therefore, as shown in the drawing, it is considered that the same effect can be obtained even if the lengths of the first arm 5 and the second arm 6 are not substantially equal.

Next, the operation of the door sealing device of the present invention will be described.

When the door D is opened, as shown in FIG. 7, the pressing portion 3 projects from the side surface D2 of the door D, and the seal member 10 is retracted into the lower edge D1.

When the door D is closed, the pressing portion 3 is moved to the side surface F of the door frame.
1 and retracts into side D2 of the door, as shown in FIG. Then, the variable length portion 4 of the operating rod 2 is compressed,
The support pins 7 advance downward by the two arms 5 and 6 and press the seal member 10 against the sill (or floor).

[0028]

As described above, in the door closing device of the present invention, when the door is closed, the sealing member advances and fills the gap with the sill or the floor surface, so that it is possible to prevent the intrusion of the interstitial air.

[Brief description of drawings]

FIG. 1 is a perspective cross-sectional explanatory view of an embodiment of a door sealing device of the present invention.

FIG. 2 is a front explanatory view with a door opened.

FIG. 3 is a front explanatory view with a door closed.

FIG. 4 shows an example of a mounted state of the door sealing device shown in FIG. 1, and is a perspective explanatory view particularly when the door is open.

5 shows an example of a mounted state of the door sealing device shown in FIG. 1, and is a perspective explanatory view particularly in a state where the door is closed.

FIG. 6 shows another example of a mounted state of the door sealing device shown in FIG. 1, and is a perspective explanatory view particularly when the door is closed.

FIG. 7 is a perspective explanatory view showing a usage state.

FIG. 8 is an explanatory perspective view showing a state in which the door is closed.

[Explanation of symbols]

 1 Casing 2 Operation Rod 3 Pressing Part 4 Variable Length Part 5 First Arm 6 Second Arm 7 Support Pin (Support Point) 10 Sealing Member D Door D1 Lower Edge D2 Side Side

Claims (1)

[Claims] 1. A casing having (a) a substantially U-shaped cross section that opens downward and is attached along the lower edge of the door, and (b) one end is fixed in the casing and the other end is A rod-shaped body forming a pressing portion protruding from the side surface of the door, the variable length being biased to the fixed one end side so as to maintain the pressing portion protruding from the side surface of the door (C) Two arms, one end of which is rotatably connected to the operation rod and the other end of which is rotatably connected to each other so as to form a support point, with an operating rod having a portion And (d) a door sealing device comprising a seal member rotatably connected to a support point formed by the two arms and housed in the casing so as to project downward.