JP2000045655A - Air-tight door structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-tight door structure easy to access from a door and capable of maintaining long-term air tightness. SOLUTION: A single swing air-tight door structure in which a door 2 is mounted on a door frame 4 via a hinge 30 in a freely open/closed manner and a door sill 51 is set to be flat includes elastic seal members 12, 22, 42 provided on the upper frame 41, the left frame 11 and the right frame 21 of the door frame 4 for exhibiting sealing property with the thrusting operation of the door 2, a sliding seal member 53 provided at the lower edge 53 of the door 2 for exhibiting sealing property in contacting the door sill 51 and cam faces 33c, 37c provided on the hinge 30 for moving up and down the door 4. As the doorsill is set to be flat, easy access from the door is possible. When the door is open, the door is moved up at the cam face of the hinge to separate the sliding seal member from a floor so that the wear of the sliding seal member can be minimized and long-term air-tightness of the door be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an airtight door structure used in a soundproof room or a shield room.

[0002]

2. Description of the Related Art FIG. 11 is an explanatory view of a conventional airtight door structure. The hermetic door structure 100 is a single-door door 10.
1, a stepped portion 102 provided around the door 101 for a door stop, and an elastic seal member 103 provided on the stepped portion 102. When the door 101 is closed, the elasticity provided on the stepped portion 102 is reduced. The peripheral portion of the door 101 comes into contact with the seal member 103, and airtightness is maintained inside and outside the door 101. However, in the hermetic door structure 100, a step portion 102 is provided on the entire periphery of the door 101 in order to maintain airtightness. Therefore, there is a possibility that the user may trip on the step 102 provided on the lower surface of the door 101 when entering or exiting. Then, by tripping on the step portion 102, the elastic seal member 103 may be deformed or broken, and the airtightness of the door 101 may be deteriorated. Therefore, an airtight door structure in which the step portion 102 for stopping the door is eliminated from the lower surface of the door 101 is desired. The following figure shows the improved hermetic door structure.

FIG. 12 is an explanatory view of a conventional improved hermetic door structure. The hermetic door structure 110 includes a door 111 which is a one-sided door, a step 112 for a door stop provided in a peripheral portion except for a lower surface of the door 111, an elastic seal member 113 provided in the step 112, and a door. 111, a sliding seal member 114 provided on the lower surface,
When the door 111 is closed, the peripheral portion except the lower surface of the door 111 contacts the elastic seal member 113 provided on the step portion 112, and the sliding seal member 114 on the lower surface of the door 111 contacts the floor 115. Slide the door 111
It maintains airtightness inside and outside. That is, in the hermetic door structure 110, since the door stop on the lower surface of the door 111 is eliminated, there is no danger of tripping when going in and out, and the inconvenience of deforming or breaking the elastic seal member 114 has been solved.

[0004]

However, since the seal member 114 is always in contact with the floor 115 even when the door 111 is opened and closed, the seal member 1 is opened and closed each time the door 111 is opened and closed.
14 occurs, and it is difficult to maintain the airtightness of the door 111 for a long period of time.

Accordingly, an object of the present invention is to provide an airtight door structure that can easily enter and exit from a door and maintain airtightness for a long period of time.

[0006]

In order to solve the above-mentioned object, a first aspect of the present invention is a one-sided airtight door structure in which a door is mounted on a door frame via a hinge so as to be openable and closable, and a shoe slip is set flat. The upper frame, left frame and right frame of the door frame are provided with elastic sealing members that exhibit sealing properties by the pressing action of the door. , And a hinge is provided with a cam surface for raising and lowering the door.

[0007] Since the shoe slip is set flat in the hermetic door structure, there is no danger of tripping when entering and exiting, and entry and exit from the door becomes easy. When the door is opened, the door is raised by the hinge cam surface, separating the sliding seal member from the floor, minimizing wear of the sliding seal member, and maintaining the door tight for a long period of time.

[0008] The second aspect of the present invention is that the door side piece closer to the hinge includes:
A projection is provided, and the projection is made to bite into the elastic sealing member. Easy to open and close by preventing the door from suddenly closing by changing the hardness and shape of the elastic sealing member, adjusting the closing speed of the door, and preventing the door from closing suddenly. become.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of an electromagnetic wave shield door according to a first embodiment of the present invention, and is a front view of an electromagnetic wave shield door structure 1 as an airtight door structure. The electromagnetic wave shield door structure 1 includes a door frame 2 and a single-opening door 4 attached to the door frame 2 via a plurality of hinges 30... The door 4 includes a frame 5 which is a skeleton, and a front plate 6 which covers the frame 5.
And a back plate 7, and a door handle 8 rotatably attached to the frame 5 via the front plate 6 and the back plate 7. B indicates a floor surface. Hereinafter, the electromagnetic wave shield door structure 1 will be described separately for the left door structure 10, the right door structure 20, the upper door structure 40, and the lower door structure 50.

FIG. 2 is a sectional view taken along the line 2-2 of FIG. The left door structure 10 includes a left frame portion 11 of the door frame 2, a shield gasket 12 as an elastic seal member attached to the left frame portion 11, and a left edge portion 13 of the door 4 which is applied to the shield gasket 12. Is what you do. The left frame portion 11 is a column formed by bending a flat sheet metal, and has a step portion 11a to which a shield gasket 12 is attached and which serves as a door stop. Reference numeral 15 denotes a left partition attached to the end 11b. The shield gasket 12 includes a silicon sponge 12a and a metal net 12b wound around the silicon sponge 12a. The left edge portion 13 is formed by fastening the left end portion 16a of the front plate 6 and the left end portion 7a of the back plate 7 to the left frame 5a, and additionally fixing the left side surface 16b of the front plate 6 to the left frame 5a. .

FIG. 3 is a sectional view taken along line 3-3 of FIG. The right door structure 20 includes a right frame portion 21 of the door frame 2, a shield gasket 22 as an elastic sealing member attached to the right frame portion 21, a right edge portion 23 of the door 4 applied to the shield gasket 22, A hinge 30 for rotatably attaching the right edge 23 to the right frame 21.
(Only one is shown). Right frame 2
Reference numeral 1 denotes a support formed by bending a flat sheet metal, and forms a step 21a serving as a door stop by attaching a shield gasket 22, and forming an attachment surface 21b on which a hinge 30 is attached.
The reinforcing frame 24 is arranged along the mounting surface 21b. 25 is a spacer for attaching the hinge 30. 22a is a silicon sponge of the shield gasket 22, and 22b is a metal net of the shield gasket 22.
The right edge 23 is provided on the right frame 5b at the right end 26a of the front plate 6.
And the right end 7b of the back plate 7 is fastened together. 2
6b is a right side surface of the front plate 6.

FIG. 4 is an exploded perspective view of the hinge of the electromagnetic wave shielding door according to the first embodiment of the present invention. The hinge 30 includes a male hinge 31 and a female hinge 32 fitted to the male hinge 31. The male hinge 31 includes a mounting plate 33 and a fitting pin 34 fitted in the mounting plate 33. The mounting plate portion 33 is formed by forming a press-fit portion 33b of the fitting pin 34 from the mounting surface 33a and forming a tapered cam surface 33c at one end of the press-fit portion 33b. Prepare. Then, the male hinge 31 applies the mounting surface 33a to the right frame 5b, and
The mounting screws 35 are tightened from b and mounted on the right edge 23.

The female hinge 32 includes a mounting plate 37 and a pin 38 fitted in the mounting plate 37. The mounting plate portion 37 forms a fitting portion 37b of the fitting pin 34 from the mounting surface 37a, forms a tapered cam surface 37c at one end of the fitting portion 37b, and stops at the other end of the fitting portion 37c. The pin 38 is press-fitted.
d ... is provided. The female hinge 32 is attached to the mounting surface 37a.
To the right frame 2 via the reinforcing frame 24 and the spacer 25.
1 and is attached to the right frame 21 by tightening the mounting screws 39 from the mounting surface 21b side.

That is, the hinge 30 has a male hinge 31 attached to the door 4 (see FIG. 1), a female hinge 32 attached to the door frame 2 (see FIG. 1), and a fitting pin 34 of the male hinge 31 attached to the female hinge 32. By inserting the door 4 into the fitting portion 37b, the door 4 is supported on the door frame 2 so as to be openable and closable. In addition, hinge 30
Is the cam surface 3c of the male hinge 31 on the cam surface 37c of the female hinge 32.
For example, when the male hinge 31 is rotated counterclockwise, the male hinge 3 is attached to the female hinge 32 so that the female hinge 32 can be raised upward in the drawing.
1 are combined.

FIG. 5 is a sectional view taken along the line 5-5 in FIG. The upper door structure 40 includes an upper frame portion 41 of the door frame 2, a shield gasket 42 as an elastic seal member attached to the upper frame portion 41, and an upper edge portion 43 of the door 4 to be brought into contact with the shield gasket 42. Is what you do. The upper frame portion 41 is a frame formed by bending a flat sheet metal, and is formed with a step portion 41a to which a shield gasket 42 is attached and which serves as a door stop.
The upper partition plate 45 is attached to the second embodiment. 42a is a silicon sponge of the shield gasket 42, and 42b is a metal net of the shield gasket 42. The upper edge 43 is formed by fastening the upper end 46a of the front plate 6 and the upper end 7c of the back plate 7 to the upper frame 5c. 46b is the upper surface of the front plate 6.

FIG. 6 is a sectional view taken along the line 6-6 in FIG. The door lower structure 50 includes a shoe shoe 51 serving as a lower frame of the door frame 2 and a lower edge 53 of the door 4 along the shoe shoe 51. The shoe shoe 51 is a channel-shaped frame whose upper surface 51a is set flat so as to match the floor surface B. The lower edge 53 abuts the lower end 7d of the back plate 7 on the lower frame 5d, and attaches a shield spring 54 as a sliding member via a holding plate 55. 57 is a floor inside the door 4.

FIG. 7 is a perspective view showing the mounting of the shield spring according to the first embodiment of the present invention. Shield spring 54
Is formed of a highly conductive spring material such as phosphor bronze along the lower frame 5d.
And a spring portion 54b extending from the attachment portion 54a. The spring portion 54b has a plurality of slits 54c formed so as to make uniform contact with the shoe shears 51. The holding plate 55 includes a mounting portion 54a for the shield spring 54.
This is a long plate material that covers the mounting portion 54a in order to securely hold the mounting portion 54a.

The operation of the above-described electromagnetic shield door structure 1 will now be described. FIGS. 8A to 8F are explanatory views of the operation of the electromagnetic wave shield door structure of the first embodiment according to the present invention. (A) is a plan view of the electromagnetic wave shield door structure 1, and (b) is a front view thereof. Similarly, (c)
FIG. 2 is a plan view of the electromagnetic wave shield door structure 1, and FIG. (E) Electromagnetic wave shield door structure 1
(F) shows the front view. (A),
(B) shows a state where the door 4 is closed. This shows that the cam surface 33c of the male hinge 31 is in close contact with the cam surface 37c of the female hinge 32, and the shield spring 54 of the lower edge 53 is in close contact with the upper surface 51a of the shoe shear 51.

In (c) and (d), the door 4 is opened as shown by the arrow. Assuming that the rotation angle of the hinge 30 at this time is θ1, the male hinge 31 has been rotated by θ1 with respect to the female hinge 32. That is, the cam surface 33c of the male hinge 31 rotates θ1 with respect to the cam surface 37c of the female hinge 32, and the male hinge 3
1 rises to the female hinge 32 by a distance S1 as indicated by an arrow. As a result, the shield spring 54 rises from the upper surface 51a of the shoe shear 51 by the distance S1. Therefore, the wear of the shield spring 54 can be minimized, and the electromagnetic wave shielding characteristics of the door 4 can be maintained well over a long period of time.

In (e) and (f), the door 4
Open as shown by the arrow. The rotation angle of the hinge 30 at this time is set to θ2 = 90 °. The cam surface 33c of the male hinge 31 rotates by θ2 with respect to the cam surface 37c of the female hinge 32, and the shield spring 54 rises from the upper surface 51a of the shoe shear 51 by the distance S2 at which the male hinge 31 has competed with the female hinge 32. .
In this embodiment, the distance S2 at which the male hinge 31 rises with respect to the female hinge 32 is set to 8 mm, and 6 m
The range of m ≦ S2 ≦ 10 mm was a practically preferable range. For example, if S2 is 6 mm or less, a sufficient distance for floating the shield spring 54 from the shoe shears 51 cannot be obtained due to variation in the installation of the door 4, and S2
If the length 2 is 10 mm or more, the opening / closing force of the door 4 becomes heavy, and the set standard cannot be satisfied.

FIG. 9 is a sectional view of an electromagnetic wave shielding door according to a second embodiment of the present invention, showing a door right side structure 70 of the electromagnetic wave shielding door 60 as an airtight door structure. In addition,
The same parts as those of the electromagnetic shield door 1 shown in the first embodiment are denoted by the same reference numerals, and the detailed description is omitted. The door left side structure 10 (see FIG. 2) and the door upper side structure 40
(See FIG. 5) and the door lower structure 50 (see FIG. 6) have the same structure as the electromagnetic shield door 1 (see FIG. 1). The right door structure 70 includes a right frame portion 71, a conductive rubber 72 as an elastic seal member attached to the right frame portion 71, a right edge 73 applied to the conductive rubber 72, and a right edge 73.
And the hinge 30 rotatably attached to the right frame portion 71.

The right frame portion 71 is a column formed by bending a flat sheet metal. The right frame portion 71 forms a step portion 71a to which a conductive rubber 72 is attached to make a door stop, and forms an attachment surface 71b for attaching the hinge 30. It was done. The right edge 73 is the top plate 7
6 between the right end portion 76a and the right side surface 76b as a door side piece, the protrusion 76c which digs into the conductive rubber 72 is raised, and both the right end portion 76a and the right end portion 7b of the back plate 7 are fastened to the right frame 5b. It was done. The front plate 76 has a shape obtained by adding a protrusion 76c to the front plate 6 shown in FIG.
That is, the electromagnetic wave shielding door 60 is
The closing speed of the door is adjusted by changing the hardness and the shape of the conductive rubber 72. In addition, the electromagnetic wave shielding property can be improved by being bitten.

FIGS. 10A and 10B show the first embodiment according to the present invention.
It is sectional drawing of another Example of the sliding member of an Example. (A)
Is a method in which a hollow conductive rubber 77 serving as a sliding member is
3 and slide the shoe 51.
(B) attaches a plate-shaped conductive rubber 78 as a sliding member to the lower edge portion 53 via a holding plate 79 and slides the shoe slipper 51.

In the first and second embodiments, the airtight door structure is replaced with the electromagnetic wave shield door structures 1 and 60 (see FIGS. 1 and 9).
However, in the first and second embodiments, an airtight door structure including the electromagnetic wave shield door structures 1 and 60 may be used. That is, the shield gasket 1 as an elastic member
2, 22, 42 (see FIGS. 2, 3, and 5) and the conductive rubber 72 (see FIG. 9) are made airtight rubber, and the shield spring 54 (see FIG. 7) as a sliding member and the conductive rubber 77, 7
8 (see FIG. 10) may be made of airtight rubber.

[0025]

According to the present invention, the following effects are exhibited by the above configuration. In the first aspect, since the shoe slip is set flat in the hermetic door structure, there is no risk of tripping when going in and out, and it is easy to get in and out of the door. In addition, when the door is opened, the door is raised by the hinge cam surface and the sliding seal member is separated from the floor, so that wear of the sliding seal member can be minimized. Therefore, the airtightness of the door can be maintained for a long time.

According to a second aspect of the present invention, a projection is provided on the door side piece closer to the hinge, and the projection is engaged with the elastic sealing member when the door is closed. By changing it, the closing speed of the door can be adjusted. Therefore, abrupt closing of the door can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of an electromagnetic shield door according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is an exploded perspective view of a hinge of the electromagnetic wave shielding door according to the first embodiment of the present invention.

FIG. 5 is a sectional view taken along line 5-5 of FIG. 1;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 1;

FIG. 7 is a perspective view showing attachment of the shield spring of the first embodiment according to the present invention.

FIG. 8 is an operation explanatory view of the electromagnetic wave shield door structure of the first embodiment according to the present invention.

FIG. 9 is a sectional view of an electromagnetic shield door according to a second embodiment of the present invention.

FIG. 10 is a sectional view of another embodiment of the sliding member according to the first embodiment of the present invention.

FIG. 11 is an explanatory view of a conventional hermetic door structure.

FIG. 12 is an explanatory view of a conventional improved hermetic door structure.

[Description of Signs] 1,60 ... airtight door structure (electromagnetic wave shield door structure),
2 ... door frame, 4 ... door, 11 ... left frame part, 12, 22, 4
2. Elastic sealing member (shield gasket) 21, 21
1 right frame, 30 hinge, 33c, 37c cam surface, 4
DESCRIPTION OF SYMBOLS 1 ... Upper frame part, 51 ... Footwear, 53 ... Lower edge part, 54 ... Sliding seal member (shield spring), 72 ... Elastic seal member (conductive rubber), 76b ... Door side piece (right side surface), 76c
... projecting parts, 77, 78 ... sliding seal members (conductive rubber).

Claims (2)

[Claims] 1. A one-sided airtight door structure in which a door is attached to a door frame so as to be openable and closable via a hinge and a shoe shoe is set flat, wherein an upper frame portion, a left frame portion, and a right frame portion of the door frame are provided. The part includes an elastic seal member that exerts a sealing property by a pressing action of the door, a lower edge portion of the door includes a sliding seal member that exerts a sealing property by being brought into contact with a shoe shear, and the hinge, An airtight door structure comprising a cam surface for raising and lowering the door. 2. The hermetic door structure according to claim 1, wherein a projection is provided on a door side piece closer to the hinge, and the projection is engaged with an elastic seal member.