JPH0415910Y2 - - 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 the door of a room that requires airtightness, such as a storage room that is subject to radio wave interference.

Conventional Technology Conventionally, in order to maintain the airtightness of 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, special hardware or latches have been used at the closed position of the door. A structure is used in which the sealing material is forcibly pressed against the door to forcibly tighten the door airtight.

Problems that the invention aims to solve: However, in conventional door airtight maintenance devices with this type of structure, special hardware or latches are used to ensure that the door is firmly and airtightly closed when the door is closed. It is necessary to support the door so that it can move somewhat relative to the entrance/exit opening in order to be in close contact with the opening via a sealing material, but such a support method complicates the structure. The disadvantages were that it was difficult to operate, and that it was difficult to press and fasten the door uniformly to the entrance/exit opening.

Means for Solving the Problems Therefore, the purpose of this invention is to eliminate such conventional drawbacks by providing a supporting bracket that extends upwardly on the upper side of the door body that closes the entrance/exit opening. A roller that runs along the track rail is provided at one end of the roller shaft that is movable in the lateral direction, and a spring is provided between the roller and the bracket surrounding the roller shaft, and the spring is compressed when the entrance/exit opening is closed. A door airtight maintenance device characterized in that the bracket slides along the roller axis to press the door body against the entrance/exit opening, thereby allowing the door body to be hermetically sealed. Our goal is to provide the following.

According to this invention, the door airtight maintenance device includes a door body that is slidably suspended and supported along a track rail that extends horizontally and approximately parallel to the upper edge of the entrance/exit opening of a room to be hermetically closed; A support bracket extends upward from the upper side, a roller shaft extends horizontally so as to be movable laterally with respect to the bracket to rotatably support the roller running along the track rail, and a roller and bracket surround the roller shaft. When the door body is pressed toward the entrance/exit opening to close the door, the bracket slides along the roller axis to allow the door body to be pressed.

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 retaining device 10 of the present invention is used in a freezer or a refrigerator that is conventionally configured to store items to be frozen or refrigerated, or to store dust or other items. In a room 1 that requires airtightness, such as a clean room for electronic components where dust is averse, suspension is carried out by rollers 15 running along a horizontal track rail 14 extending roughly parallel to the upper edge of the entrance/exit opening 3 of the wall panel 2. A suspended door body 11, a support bracket 16 extending upward from the upper side of the door body 11, and a track rail 14.
A roller shaft 17 extends horizontally so as to be movable laterally with respect to the bracket 16 to rotatably support the roller 15 traveling along the roller 15, and a spring 18 is provided between the roller 15 and the bracket 16 surrounding the roller shaft 17. It is mainly composed of.

A plurality of fluid cylinder devices 12 are provided near the periphery of the door body 11 in order to hermetically press the door body 11 that closes the entrance/exit opening 3 of the chamber 1 to be hermetically closed against the entrance/exit opening 3. The track rail 14 for suspending and supporting the door body 11 is preferably made by extrusion molding of a light alloy such as an aluminum alloy, has a cross-sectional shape as shown in FIG. It is attached to the wall panel 2 so as to extend horizontally substantially parallel to the upper edge of the access opening 3. 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 nut, for example, is installed at the other end of the roller shaft 17 to prevent it from falling off the bracket 16. 19 is fixed, and a suitable coiled spring 18 is also 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 1
An appropriate handle 37 may be provided to allow manual operation of the device.

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, the suspended door body 11 is first slid along the track rail 14 to the position shown in FIG. device 12
When the fluid cylinder device 12 is operated by supplying compressed air from the compressor 6 through the flexible hose 7, the piston rod end of the fluid cylinder device 12 becomes a fixed portion of the upper fluid cylinder device 12. A portion of the rail 14 is engaged with a fixed support 5 fixed to the floor 4 in the lower fluid cylinder device 12, respectively, and the door body 11 is pressed against the entrance/exit opening 3 of the chamber 1 and tightened. The sealing material 25 on the back side of the door body 11 forms an airtight seal. At this time, the bracket 16 of the door body 11 is able to slide along the roller shaft 17 due to the pressing force of the fluid cylinder device 12, so that the door body 11 is firmly and airtightly fastened to the access opening 3. . In addition, the door body 11
is always kept away from the wall panel 2 by the spring 18 during movement, so it can be moved easily.

Next, when compressed fluid is supplied to the fluid cylinder device 33 of the seal device 30 at the lower end of the door body 11 and the fluid cylinder device 33 is operated, the guide rail 32 attached to the end of the piston rod is operated downward, so that the guide rail 32 is moved downward. A sealing material 33 whose one end is attached to the rail 32 is brought into contact with the floor surface as shown by the dotted line in FIG.
As a result, complete hermetic sealing of the door body 11 to the entrance/exit opening 3 of the chamber 1 is reliably 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, a complete airtight seal of the entrance/exit opening can be maintained simply, easily, and reliably, and when the door is opened/closed, the sealing device, which forms a so-called sliding seal, can be moved in a lifted state away from the floor. Since this is done, there will be no damage to the sealing device. In particular, when closing and tightening the door, the 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 used effectively, 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,
It goes without saying that any automatic door can be used, and 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 any other suitable location. 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 ... Sealing material, 30 ... Sealing device, 31 ... Sealing material, 32 ... Guide rail,
33...Fluid cylinder device.

Claims (1)

[Scope of utility model registration request] A door body 11 is slidably suspended and supported along a track rail 14 extending substantially parallel to the upper edge of the entrance/exit opening 3 of the chamber 1 to be hermetically closed, and a pair of supports extending upward from both ends of the upper side of the door body 11. a bracket 16, a roller shaft 17 that rotatably supports the roller 15 running along the track rail 14 and extends horizontally so as to be movable laterally with respect to the bracket 16; A spring 18 is provided between the doors, and a fluid cylinder device 12 is provided at the upper and lower parts of the door body 11 to press the door body 11 toward the entrance/exit opening 3 to close the door, thereby airtightly tightening the door body 11. A door airtight maintenance device featuring: