JPS60148982A - Seal structure of door body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seal structure for a door body used for a sash, a showcase, a building, etc.

Conventionally, various methods have been used to seal door bodies used for sashes, showcases, buildings, etc., but most of them involve applying a shaped sealant made of soft or hard rubber to the outer periphery of the door body or the door frame. It was fitted into the inner periphery and pressed tightly against the door frame to ensure airtightness.

However, in such a conventional door body sealing structure, deformation due to long-term use of the fixed sealing material,
Alternatively, it has been difficult to maintain a perfect seal for a long period of time due to performance deterioration, scratches caused by external forces, accumulation of dirt, etc. or,
Small amounts of gas generated by regular sealing materials may enter the case, which goes against the original purpose of keeping the case airtight. For this reason, in museums, art galleries, exhibition cases or material storage rooms that require particularly high sealing performance, it is necessary to adjust the humidity inside the case or fill it with inert gas after the door is closed. If the sealing performance of the door body is not perfect, air will enter and exit through minute gaps in the door body due to pressure differences, making it difficult to maintain the required humidity, prevent harmful gases from entering, and prevent inert gases from flowing out. Then,
This also had the problem of affecting the state of preservation of valuable collection items.

This invention was made by focusing on these conventional problems, and aims to complete the sealing of the door body without tightening the gap in the door body by external force, and requires higher sealing performance. The purpose of this product is to provide a door seal structure that is ideal for use in preservation, exhibition cases, various materials storage areas, pressurization/decompression rooms, clean rooms, etc. of museums and other museums.

In order to achieve the above object, the present invention provides a protrusion on the periphery of either the door body or the door frame, and
The door body on the other side with respect to the door body or door frame provided with the above-mentioned protrusion retains all of the magnetic fluid on the periphery of the door frame through a magnet,
When the door body is closed, the protrusion can be directed into or slid into the magnetic fluid.

The present invention will be explained below based on examples.

1 to 6 show display glass cases using door seal structures according to two embodiments of the present invention.

1 in the figure is a glass case for display, 2 front, 3 back,
The top surface 4, left side, and right side 5 are each made of transparent plate glass, so that the displayed items placed on the internal display stand 6 can be viewed from the outside.

A storage space 7 for storing a humidity control device or a humidity control agent is provided at the lower stage of the display stand 6. The front surface 2 of this exhibition glass case 1 is a slide rail 8a.

There is a door body 9 that opens and closes in the front-rear direction (direction into the figure) in an extracted manner through Bb'6, and a handle to
, tab are provided. The door body 9 engages with the display glass case 1 and the door frame body 11 on the front side 2, and the periphery of this door frame body 11 is provided with a first protrusion 12 and a first protrusion 12, respectively.
Three protrusions, the second protrusion 13 and the sixth protrusion 14, are formed of formwork material. On the other hand, on the outer peripheral edge of the door body 9, three recesses, a first recess 15, a second recess 16, and a third recess 170, which engage with the first to third protrusions, respectively, are formed of a formwork material having magnetic permeability. Each protrusion 12,
13, 14 and recesses 15, 16, 17, the first
A seal portion 18, a second seal portion 19, and a third seal portion 2o are formed. Inside the first fourth part 15 and the fifth recess 17,
The regular sealing material 21゜21 is made of steel, and the door body 9
When the door body 9 is closed, the first protrusion 12 and the fifth protrusion 14 come into contact with the regular sealing materials 21 and 21 to seal the first seal part 18 and the third seal part 2o. I try to keep the positional relationship constant. The internal pressure of the second recess 16 is applied to the magnetic fluid 2 through the magnetic force of the permanent magnet 22.
3 is held, and the formation of a magnetic force inside the second recess 16 is performed by bringing an L-shaped iron strip 24 connected to a permanent magnet 22 into contact with the outside of the second recess 16. This magnetic fluid is a liquid magnetic sensitive material also called magnetic liquid, and is made by dispersing magnetically sensitive fine particles in a solvent using a surfactant. This magnetic fluid 23 is connected to the permanent magnet 22
The magnetic force is retained in the second recess 16 in the form of a film through the L-shaped iron strip 24 (see FIGS. 4 and 6). When the door body 9 is closed, the second protrusion 13 is enlarged into the film-like magnetic fluid 23 held in the second recess 16, and the second seal portion 19 is sealed.

Next, the operation of the above embodiment will be explained. arts and crafts,
After placing exhibits such as valuable materials on a display stand 6 and storing a humidity control agent such as silica gel in a storage space 7, a door body 9 is closed. Then, the regular sealing material 21 in the first recess 15 and the third recess 17 on the periphery of the door body 9 is removed.
, 21 and the first protrusion 12 and third protrusion 1 on the periphery of the door frame 11
4 zero contact, and the door body 9 can be sealed at two locations, the first seal portion 18 and the third seal portion 20. Furthermore, the second protrusion 13 slides into the magnetic fluid 23 held in the form of a film through the magnetic force of the permanent magnet 22 in the second recess 16 on the periphery of the door body 9, making it possible to seal the second seal portion 19. becomes. As a result, when the door body 9 is closed, the first seal portion 18 to the fifth seal portion 2
It is now possible to seal at three locations, and the interior of the display glass case 1 becomes completely airtight.

According to the above embodiment, by using magnetic fluid in addition to sealing the door with a conventional regular sealing material, it is possible to achieve a complete airtight seal, so the preservation state of the exhibited items inside the exhibition glass case can be improved. Best possible to maintain. It can adequately cope with changes in the external environment, such as the difference in pressure between the inside and outside of the case when a low pressure passes through, or an extreme increase in humidity during the rainy season, and the lifespan and effectiveness of the humidity control agent can be significantly increased compared to conventional methods. You can expect it. In addition, conventional shaped sealing material is used in two places, the first seal part 18 and the third seal part 20, to prevent dust from directly adhering to the magnetic fluid and causing performance deterioration. . This completely blocks out dirt and dust contained in the outside air.

In addition, according to the above embodiment, the magnetic fluid is held on the periphery of the door body, and the protrusion is provided on the periphery side of the door frame body, but these may be arranged in the opposite way, and the protrusions are provided on the periphery side of the door frame body. Equivalent performance can also be obtained by holding the magnetic fluid in the protrusion on the door frame side. Further, it is not necessarily necessary for the protrusion to enter the magnetic fluid when the door body is closed, and the same airtight performance can be obtained even if the protrusion is in close contact with the magnetic fluid.

As explained above, the present invention provides a protrusion on the periphery of either a door body or a door frame, and a door body or door frame on the other side of the door body or door frame provided with the protrusion. The gap between the door body and the door frame is reduced by holding the magnetic fluid around the periphery of the body through a magnet, and by making the protrusion close to the magnetic fluid when the door body is closed. completely sealed,
Preservation in museums, art galleries, and other museums that require particularly high sealing properties.
Glass cases for exhibitions, storage for various materials, etc.:・!゛・It can be said that the door seal structure is ideal for doors of decompression rooms, clean rooms, etc.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a display glass case using a door seal structure according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the open state of the door of the display glass case. 3 is an enlarged sectional view taken along the line m-m in FIG. 1, and FIG. 4 is an enlarged sectional view corresponding to FIG.
Figure 5 is an enlarged sectional view taken along line V-V in Figure 1;
The figure is an enlarged sectional view corresponding to FIG. 5 showing the door body in an open state. 9... Door body 11... Door frame 12... First protrusion 13... Second protrusion 14... Third protrusion 18... First seal part 19... Third 2nd seal part 20...3rd seal part 22...Permanent magnet [magnet]
23...Magnetic fluid Fig. 1 Fig. 2 Fig. 5 Fig. 6

Claims (1)

[Claims] A protrusion is provided on the periphery of either the door body or the door frame, and magnetic fluid is applied via a magnet to the periphery of the door body or door frame on the other side of the door body or door frame provided with the protrusion. A seal structure for a door body, characterized in that the protrusion can be held in close contact with or enter the magnetic fluid when the door body is closed.