JPH0423074B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an airtight door in a room where airtightness is required, such as a clean room.

(Prior art) In animal and plant laboratories, hospitals, semiconductor factories, pharmaceutical factories, etc., airtight rooms such as clean rooms (dust-free rooms) are used to obtain accurate experimental results and to ensure excellent quality control. There are many examples that have this.

(Problem to be solved by the invention) The entrance door of this clean room is an airtight door to maintain the airtightness of the room, but since this airtight door is generally an opening door, for example, a trolley can be used to enter and exit the room. When opening the door, the door must be left open in advance, which requires manual or mechanical maintenance means to keep it open. It takes time to close the door, and therefore, it takes time to enter and exit with a swinging door. Furthermore, since the lower frame is located on the floor surface, there is a problem in that the lower frame becomes an obstacle to traveling when the trolley enters and exits. Another possibility is a sliding door, but since the bottom frame of this type of door has a groove above the floor surface, dust accumulates in the groove, causing problems such as the heels of high heels getting caught. .

An object of the present invention is to provide an airtight door that does not require much effort for people, trolleys, etc. to enter and exit, allows smooth entry and exit and walking, is free from dust problems, and can reliably maintain airtightness.

(Means for Solving the Problems) The airtight door of the present invention has a door pocket and a sliding door, and the sliding door is suspended from the door pocket to the vertical frame by a hanging wheel running on a guide rail provided on the upper frame. Can be withdrawn. The sliding door is pulled toward the airtight room by the pulling means, and when the door is closed, the three sides (the top side and both sides) excluding the bottom side
Each side of the door is in close contact with the upper frame, vertical frame, and door pocket through an airtight material. A lower airtight material is attached to the lower side of the sliding door along its entire length, and a predetermined distance is left between this airtight material and the floor surface.
The lower airtight material is brought into pressure contact with the floor surface when the sliding door is lowered by means of dropping the sliding door. Some airtight doors have a lower frame below the lower side of the sliding door, while others do not. In examples with a lower frame, the upper surface of the lower frame is flush with the floor. Therefore, the "floor surface" on which the lower airtight material approaches and separates includes the "upper surface of the lower frame" when there is a lower frame.

The pulling means includes an upper guide roller whose rotation center is a support shaft, an upper pull rail on which this upper guide roller runs, a lower guide roller whose rotation center is around a support shaft, and a lower pull rail on which this lower guide roller runs. It consists of a rail and a side drawing body having a drawing slope, and one of the support shaft of the upper guide roller and the upper drawing rail is attached to the upper end of the sliding door and the other to the upper frame, The support shaft of the lower guide roller is erected on the floor surface on the rear end side of the sliding door in the closed state, and the lower pulling rail is installed inside the lower side of the sliding door, and both the upper and lower pulling rails A drawing bent portion is formed at the same position on the upper and lower sides of the sliding door, and the side drawing member is attached to the door stop surface of the vertical frame.

The dropping means is provided with a dropping groove deeper than the above distance in the running surface of the hanging wheel of the guide roller,
The structure is such that the hanging wheel is dropped into this groove.

(Example) Examples of the present invention will be described below based on the drawings.

In Figures 1 to 3, the sliding door 1 can freely travel from the door pocket 2 to the vertical frame 4 while suspended from the upper frame 3, and in the closed state, the clean room 5 side (left side in Figure 2) faces the outside 6 side (right side). Seal tightly. sliding door 1
As shown in FIG. 2, a bearing 8 with a built-in slide bearing 7 is attached to the upper end, and a slide shaft 9 is pivotally supported in the left-right direction by this bearing.
At both ends of the slide shaft, there are suspended wheels 11 that run on guide rails 10, 10 provided in the longitudinal direction of the upper frame.
11 is installed. In addition, support shafts 12 and 1 are provided on both sides of the upper end surface of the sliding door 1 as shown in FIGS. 2 and 4.
2 are erected, and each support shaft supports an upper guide roller 13, 13 whose rotation center is the support shaft. Each guide roller 13 can run freely within an upper drawing rail 14 fixed to the upper inner surface of the upper frame 3. This upper pull rail has a pull bent portion 14 which is bent toward the clean room 5 side by a length L at two places, the middle part and the end on the side of the vertical frame 4.
a, 14a, and both pulling bending parts pull the sliding door 1 toward the left in FIG. This is for making the airtight material 15 adhere closely to the airtight material 15. Further, a means for drawing the sliding door toward the clean room 5 side is also provided on the lower side of the sliding door 1.

That is, as shown in FIGS. 1 to 3, a support shaft 17 is erected on the floor 16 on the rear end side of the sliding door 1 in the closed state, and the support shaft 17 has a lower part that rotates around the support shaft. A guide roller 18 is attached. The lower guide roller can freely run within the guide path 19a of the lower pull rail 19, which has an opening at the lower end and is fixed within the lower side of the sliding door 1, in a relative relationship with the sliding door. At the rear end side (left side in FIG. 3) of the guide path 19a, a drawing bent part 19b is formed which is bent toward the clean room 5 by a length equal to the above-mentioned length L. The lower guide roller 18 changes its course by passing through the drawing bent part 19b, and when changing to the clean room 5 side, the sliding door 1 is drawn toward the clean room side and can come into close contact with the airtight material 15. The position where the lower guide roller 18 moves to the drawing bent part 19b of the lower drawing rail, and the position where the upper guide roller 13 moves to the drawing bending part 14 of the upper drawing rail.
The positions at which the sliding door moves to a correspond to the upper and lower sides of the sliding door 1, so that the pulling operation of the upper side of the sliding door and the pulling operation of the lower side of the sliding door can be performed at the same time.

In addition, there are second and third
As shown in the figure, a side drawing block 20, which is a side drawing body, is fixed, and the corner of the side surface of the tip of the sliding door 1 can slide on the drawing slope 20a provided on each side drawing block. is in contact with. Then, with the closing operation of sliding door 1,
The corner of the sliding door contacts the drawing inclined surface 20a,
Since this drawing inclined surface is slid toward the vertical frame 4 side,
The sliding door is pulled toward the clean room 5 side.
By providing the side pulling blocks, the pulling operation of the upper and lower parts of the sliding door 1 can be performed even more smoothly. It should be noted that the side drawing body is constructed in the form of a block or another band.

Further, a lower airtight material 15a is attached to the lower side of the sliding door 1 over its entire length. The lower airtight material is inserted between the side of the lower draw rail 19 and the side plate of the sliding door 1, and the lower surface of the lower airtight material is spaced from the floor by a predetermined distance 21 (FIG. 2). Lower airtight material 15a
can be brought into pressure contact with the floor 16 by lowering the sliding door 1 using the dropping means.

Here, the dropping means will be explained.

As shown in FIGS. 1, 2 and 5, drop grooves 10a, 10a for dropping the hanging wheels 11, 11 are provided in two places at the middle part of the traveling rails 10, 10 and at the side end of the vertical frame 4. It has been formed. The depth of this drop groove is set to be at least 21 mm between the lower airtight material 15a and the floor 16 surface.

Next, how to use it will be explained.

When the sliding door 1 is pulled out from the door pocket 2 towards the vertical frame 4, the hanging wheel 11 runs on the rail 10, the upper guide roller 13 runs on the upper pulling rail 14, and soon the sliding door is about to close. As shown in FIG. 4, the upper guide roller moves into the drawing bend 14a of the upper drawing rail, and at the same time the lower guide roller 18 also moves into the drawing bend 19b of the lower drawing rail 19, and eventually the upper guide roller 13 moves into the drawing bend 14a of the upper drawing rail. Bent part 14
a and moves to the clean room 5 side by a length L, so the upper part of the sliding door 1 is forcibly drawn toward the clean room side, and the lower guide roller 18
Also, the pulling bent portion 19 of the lower pulling rail 19
b, the lower part of the sliding door is forcibly drawn toward the clean room 5 side, the sliding door contacts the side drawing block 20 of the vertical frame 4, and is further drawn toward the clean room side by the drawing slope 20a, closing the door. When this happens, the top and both sides of the sliding door come into close contact with the upper frame, the vertical frame 4, and the door pocket 2, as shown in FIG. 3, and the sliding door seals the clean room door except for the bottom side.

21 between the lower side of the sliding door 1 is opened when the hanging wheel 11 is moved to the guide rail 10 at the same time as the sliding door is closed.
As the sliding door falls into the drop groove 10a, the sliding door lowers and the lower airtight material 15a falls into the floor 16.
This is done by pressing against the surface (Fig. 5).
As a result, when the door is closed, all four sides of the sliding door 1 are connected to the upper frame 3 through the airtight material 15, 15a.
The airtightness of the clean room 5 is maintained by closely contacting the vertical frame 4, the door pocket 2, and the floor 16.

As another example of the upper drawing means, the upper guide roller 13 may be provided on the upper frame 3 side, and the drawing rail 14 may be provided on the upper end of the sliding door 1.

As another example of the guide rail, as shown in FIG. 6, it is composed of one guide rail 22, and a hanging wheel 23 running on this guide rail is supported cantilevered on a support plate 24 attached to the upper end of the sliding door 1. However, a sliding door may be hung above this hanging wheel. A drop groove 22a is provided on the running surface of the guide rail 22.

The airtight material 15 may be attached to the sliding door 1 side as shown in FIG. 6, and does not necessarily need to be attached to the upper frame 3, vertical frame 4, and door frame 2 side.

(Effects of the Invention) As explained above, according to the present invention, when the sliding door is in the closed state, the lower airtight material can come into contact with the floor surface, so the floor surface facing the lower side of the sliding door can be made flat. This allows people, trolleys, etc. to move in and out smoothly, eliminates the need for manpower as in the past when moving trolleys, etc. in and out, allows smooth walking, and eliminates the problem of dust as in the past. The sliding door is pulled by using upper and lower guide rollers and upper and lower pulling rails, and also uses a side pulling body with a pulling slope on top of the guide rollers, so that the above-mentioned pulling action is achieved. It is effectively performed and airtightness can be maintained reliably by pulling.

[Brief explanation of drawings]

Fig. 1 is a front view, Fig. 2 is an enlarged sectional view taken along the line shown in Fig. 1 at the position of the sliding door indicated by the chain line in Fig. 1;
Figure 3 is an enlarged cross-sectional view taken from Figure 1, Figure 4 is an explanatory diagram showing the positional relationship between the upper guide roller and the upper pull rail, and Figure 5 is the relationship between the hanging wheel and the drop groove when the door is closed. 6th enlarged sectional view showing
The figure is an enlarged sectional view showing another embodiment of the guide rail. 1...Sliding door, 2...Door pocket, 3...Top frame, 4...
... Vertical frame, 5 ... Airtight room (clean room), 10
... Guide rail, 10a ... Dropping groove, 11
... Hanging wheel, 12 ... Support shaft, 13 ... Upper guide roller, 14 ... Pulling rail, 14a ... Pulling bent part, 15 ... Airtight material, 15a ... Lower airtight material, 16 ... Floor, 17 ... Support shaft, 18...lower guide roller, 19...lower pull rail,
19b... Pulling bending part, 20... Side drawing body (side drawing block), 20a... Pulling slope, 21... Interval, 22... Guide rail, 22a... Dropping groove, 23... Hanging wheel.

Claims (1)

[Scope of Claims] 1. A sliding door that can be pulled out from the door pocket to the vertical frame in a suspended state via a hanging wheel running on a guide rail on the upper frame, and an upper frame that pulls the sliding door toward the airtight room, and
a pulling means that is brought into close contact with the vertical frame and the door pocket; and a pulling means that is attached to the lower side of the sliding door along its entire length;
The pulling means includes a lower airtight material located at a predetermined distance from the floor surface, and a drop-in groove provided on the running surface of the guide rail and having a predetermined depth into which the hanging wheel is dropped, and the pulling means includes a supporting member. An upper guide roller whose rotation center is around a shaft, an upper pull rail on which this upper guide roller runs, a lower guide roller whose rotation center is around a support shaft, a lower pull rail on which this lower guide roller runs, and a pull slope. One of the support shaft of the upper guide roller and the upper pull rail is attached to the upper end of the sliding door, and the other is attached to the upper frame, and the support shaft of the lower guide roller is attached to the upper frame. is installed on the floor at the rear end of the sliding door in the closed state, and the lower pull rail is installed inside the bottom of the sliding door, and both the upper and lower pull rails are installed at the top and bottom of the sliding door. A drawing bent part is formed at a position where the door is opened, the side drawing body is attached to the door stop surface of the vertical frame, and the depth of the dropping groove is greater than or equal to the gap. Airtight door.