JPH0439994Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications This invention is applicable to freezers, refrigerators, clean rooms,
This invention relates to an airtight maintenance device for automatic and manual doors of rooms that require airtightness, such as storage warehouses that are subject to radio wave interference.

Conventional Technology Conventionally, in order to maintain the airtightness of automatic and manual doors installed in rooms that require a high degree of airtightness, such as large freezers, refrigerators, clean rooms, and storage rooms subject to radio wave interference, it has been necessary to A structure is used in which the sealing material is forcibly pressed using hardware or a latch to forcibly tighten the door airtight.

Problems that the invention aims to solve However, with the metal fittings and latches used as devices for keeping the airtightness of conventional doors with this type of structure, it is necessary to apply a large amount of force manually when closing or opening the door. It was difficult to airtightly seal the whole area evenly and without gaps, and there were drawbacks such as friction of the sealing material.

Means for Solving the Problems Therefore, the purpose of this invention is to eliminate such drawbacks of the conventional method by running the door body along a horizontal track rail with respect to the entrance/exit opening of the room that requires airtightness. It is suspended and supported by rollers, and multiple fluid cylinder devices are installed near the periphery of the door body.
It is an object of the present invention to provide an airtight maintenance device for a door that can easily and reliably press and close a door body against a room entrance/exit opening by the operation of these fluid cylinder devices.

According to this invention, the door airtightness maintaining device includes a door main body that is suspended and supported in a horizontally movable manner by rollers running along a horizontal track rail, and A sealing material provided along the periphery of the door body facing the edge of the entrance/exit opening, and the door body is pressed against the entrance/exit opening in order to close the door body, and the area around the entrance/exit opening is hermetically sealed with the sealing material. A plurality of fluid cylinder devices installed near the periphery of the door body, a sealing material with a U-shaped cross section provided along the lower edge of the door body, and a vertically movable guide to which one end of this sealing material is attached. The guide rail is moved up and down to support the sealing material so that it floats above the floor surface when the rail and door body are opened and closed, and to bring the sealing material into contact with the floor surface and create an airtight seal when the door body is closed. It comprises another movably supported fluid cylinder device, which presses and closes the door body in an airtight manner against the access opening and the floor of the chamber.

Other objects, features and advantages of the invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

Embodiments As shown in FIGS. 1 to 4 of the drawings, the door airtight maintenance device 10 of the present invention is used in a freezer, a refrigerator, or a refrigerator that is conventionally configured to store and store items to be frozen or refrigerated. In a room 1 that requires airtightness, such as a clean room for electronic parts that is sensitive to dirt and dust, the roller 15 runs along a horizontal track rail 14 that extends roughly parallel to the upper edge of the entrance/exit opening 3 of the wall panel 2. It mainly consists of a suspended and supported door body 11 and a plurality of fluid cylinder devices 12 provided near the periphery of the door body 11 to press the door body 11 airtightly against the entrance/exit opening 3. .

The track rail 14 for suspending and supporting the door body 11 is suitably made by extrusion of light alloy such as aluminum alloy, and has a cross-sectional shape as shown in FIG. Wall panel 2 extends horizontally almost parallel to the upper edge of 3.
installed on. A pair of upwardly extending brackets 16 are attached at a distance from each other near both ends of the upper side of the door body 11, and roller shafts 17 are provided that extend horizontally through the brackets 16 so as to be movable laterally. There is. A roller 15 is rotatably provided at one end of the roller shaft 17 so as to roll on the rail member 20 of the track rail 14, and a bracket 16 is provided at the other end of the roller shaft 17.
For example, a nut 19 is fixed to the roller shaft 17 to prevent it from falling off, and a suitable coiled spring 18 is provided between the bracket 16 and the roller 15 surrounding the roller shaft 17.

Further, an appropriate sealing material 25 is provided on the back side of the door body 11, that is, around the side of the entrance/exit opening 3 of the chamber 1, to maintain airtightness when the door is closed. In particular, a plurality of fluid cylinder devices 1 are used to press the door body 11 against the access opening 3 when the access opening 3 of the chamber 1 is closed.
2 are provided near the corners of the door body 11, for example near the four corners. In order for these fluid cylinder devices 12 to work as a fastening device and press and move the door body 11, the piston end of the upper fluid cylinder device 12 engages with a part of the track rail 14 that forms the fixed part, and the lower fluid The piston end of the cylinder device 12 is adapted to engage with a fixed post 5 fixed to the floor 4 and act to fasten the door body 11.
In order to apply compressed air to these fluid cylinder devices 12, an appropriate compressor 6 may be provided at an appropriate location, in the illustrated embodiment, at the right end of the track rail 14 as shown in FIG.

In addition, in order to maintain the airtightness of the lower edge of the door body 11 when the lower end of the entrance/exit opening 3 of the chamber 1 has no wall part and is directly on the floor, a seal as shown in FIG. 4 may be used. A device 30 is provided. As shown in the figure, this sealing device 30 includes a sealing material 31 having a U-shaped cross section provided at the lower edge of the door body 11, and a sealing material 31 provided at the lower edge of the door body 11.
It is comprised of a guide rail 32 which is movable up and down, to which one end is attached, and a fluid cylinder device 33 for moving this guide rail 32 up and down.
In order to ensure airtight sealing, it is preferable to provide a pair of sealing materials 31 as shown in the figure, but it is of course possible to use only one. The other end of the sealing material 31 is attached to the lower end of the door body 11 , and the guide rail 32 to which the one end of the sealing material 31 is attached is attached to the piston end of the fluid cylinder device 33 . Upon operation, the sealing material 31 comes into contact with the floor surface as shown by the dotted line in FIG. 4, thereby making it possible to achieve an airtight seal. Note that in order to smoothly guide the movement of the door body 11, a guide roller 35 that can engage with the guide rail 32 is provided as appropriate. In addition, the door body 11
An appropriate handle 37 can be provided to allow manual operation.

Functions and Effects of the Invention According to the door airtightness maintaining device 10 of this invention configured in this way, the entrance/exit opening 3 of the chamber 1 which requires airtightness is provided.
In order to close the door body 11 which is suspended,
slide along the track rail 14 to the position shown in FIG. 1, and in this state, the door body 11
When the fluid cylinder device 12 is operated by supplying compressed air from the compressor 6 through the flexible hose 7 to the fluid cylinder device 12 for tightening provided in the In the fluid cylinder device 12, a fixed column 5 fixed to a part of the track rail 14 forming a fixed part, and in the lower fluid cylinder device 12, fixed to the floor 4.
are engaged with each other to open the door body 11 to the entrance/exit opening 3 of the chamber 1.
The sealing material 25 on the back side of the door body 11 forms an airtight seal by pressing against the door body 11 and tightening it. Next, the compressed fluid is supplied to the fluid cylinder device 33 of the seal device 30 at the lower end of the door body 11 to close the fluid cylinder device 33.
When the piston rod is actuated, the guide rail 32 attached to the end of the piston rod is moved downward, so that the sealing material 3 whose one end is attached to the guide rail 32 moves downward.
1 is brought into contact with the floor surface as shown by the dotted line in FIG. will definitely be achieved.

In addition, when opening the entrance/exit opening 3 of the chamber 1,
The supply of compressed fluid to the fluid cylinder device 12 for tightening and the fluid cylinder device 33 of the seal device 30 is switched to act on the other side of the piston to release the tightening of the fluid cylinder device 12, and the seal of the seal device 30 is released. The entrance/exit opening 3 of the room 1 is opened by lifting the material 31 from the floor and moving the door body 11.
can be released.

Therefore, when the door is closed, the entrance/exit opening can be easily and reliably sealed completely, and when the door is opened/closed, the sealing device, which forms a so-called sliding seal, can be moved in a raised position away from the floor. Since this is done, there will be no damage to the sealing device. Furthermore, when closing and tightening the door, the support bracket attached to the top of the door body only needs to slide slightly along the roller axis of the roller that suspends and supports the door body, and the roller axis is used to support the tightening of the door. It can be effectively used for
The suspension support mechanism can be simplified, and the entire door airtight maintenance device can be manufactured compactly with a simple configuration.

In addition, the door airtight maintenance device of this invention can be used for manual doors,
Any automatic door may be used, and it goes without saying that it can be used for doors of freezers, refrigerators, and other rooms that require airtightness, and the fluid cylinder device for tightening is not limited to the four corners of the door, but can be installed at other appropriate locations. It is something that can be done.

[Brief explanation of the drawing]

Figure 1 is a front view of the door airtightness maintaining device of this invention, Figure 2 is a side sectional view, Figure 3 is an enlarged side sectional view of the support part of the door body, and Figure 4 is the sealing device at the bottom of the door body. It is an enlarged sectional side view. In the figure, 1... Room, 2... Wall panel, 3... Access opening, 4... Floor, 5... Fixed support, 6... Compressor, 10... Airtight maintenance device, 11... Door body, 1
2... Fluid cylinder device, 14... Track rail, 15... Roller, 16... Bracket, 17
... Spring, 25 ... Seal material, 30 ... Sealing device, 31 ... Seal material, 32 ... Guide rail,
33...Fluid cylinder device.

Claims (1)

[Scope of utility model registration request] A door body 1 is suspended and supported so as to be movable laterally by rollers 15 running along a horizontal track rail 14 of an entrance/exit opening 3 of a room 1 that requires airtightness.
1. A sealing material 25 provided along the periphery of the door body 11 facing the edge of the entrance/exit opening 3 of the chamber, and a sealing material 25 provided along the periphery of the door body 11 to press the door body against the entrance/exit opening 3 to close the door body 11. A sealing member 25 is installed around the entrance/exit opening 3.
a plurality of fluid cylinder devices 12 provided near the periphery of the door body 11 for airtight sealing; a sealing material 31 with a U-shaped cross section provided along the lower edge of the door main body 11; A vertically movable guide rail 32 with one end attached, door body 1
The guide rail 32 supports the sealing material 31 so as to float above the floor surface when the door main body 11 is opened and closed, and brings the sealing material 31 into contact with the floor surface to achieve an airtight seal when the door body 11 is closed. An airtight maintenance device for a door, which includes another fluid cylinder device 33 that supports the door so as to be movable up and down.