JPH0631488B2 - Airtight door - Google Patents

Description

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, laboratories, hospitals, semiconductor factories, and drug factories, for the purpose of obtaining accurate experimental results and achieving superior quality control, for example, in an airtight room such as a clean room (dust-free room). There are many examples that are equipped with.

(Problems to be Solved by the Invention) The door of the entrance and exit of this clean room is an airtight door in order to maintain the airtightness of the room, but since this door is generally an open door, for example, a dolly is used to enter and exit the room. In this case, the door must be left open in advance, and therefore a manual or mechanical maintenance means for maintaining the open state is required. When this mechanical means is used, the door is closed manually. It took a lot of time and labor, and therefore the open door required a lot of labor to get in and out. Further, since the lower frame is located on the floor surface, there is a problem that the lower frame hinders traveling when the truck moves in and out. Further, although a sliding door type door is conceivable, in this type of door, since the lower frame has a groove on the floor surface upward, dust is accumulated in the groove and, for example, the heel of a high heel is pinched.

The object of the present invention is to make it easy for people, trucks, etc. to come and go,
Moreover, it is to provide an airtight door that can be smoothly entered and exited and run, and has no problem of dust.

(Means for Solving the Problem) An airtight door according to the present invention includes a door bag and a sliding door to which a handle for opening and closing is attached, and the sliding door can travel from the door bag to the vertical frame while being suspended from the upper frame. Is. This sliding door can be pulled to the airtight chamber side of the upper frame, the vertical frame, and the door pocket by the pulling means, and by this pulling, each surface on the airtight chamber side of the upper side part and both side parts excluding the lower side part is provided with the airtight material through the airtight material. It adheres to the upper frame, vertical frame and door pocket. A lower airtight member is attached to the bottom of the sliding door over the entire length so that the lower airtight member can come into contact with and separate from the floor surface. The lower airtight member is moved up and down by the pressing operation means. The pressing operation means includes a support frame which is attached to the lower side of the sliding door so as to be movable up and down and supports the lower airtight member, a plurality of pressing pins erected on the support frame, and the support frame. A spring that biases the spring force upward, a slide plate that is slidable above the pressing pin head in the running direction of the sliding door, and the pin head that is provided below this slide plate And a pressing cam that can be pressed against the spring force. The slide plate is interlocked with the handle via an interlocking mechanism. The lower airtight material is pressed onto the floor surface by pressing by the pressing operation means. There are airtight doors with a lower frame below the lower side of the sliding door and those without a lower frame. In an example with a lower frame, the upper surface of the lower frame should be flush with the floor. From this, the "floor surface" where the lower airtight member comes into contact with and separates includes the "lower frame upper surface" when the lower frame is provided.

(Examples) Examples of the present invention will be described below with reference to the drawings.

1 to 3, the sliding door 1 can freely travel from the door pocket 2 to the upper frame 3 up to the vertical frame 4, and in the closed state, the clean room 5 side (left side in FIG. 2) is outside 6 side (right side).
Seal from. As shown in FIG. 2, the sliding door 1 has a bearing 8 having a built-in slide bearing 7 attached to the upper end thereof, and a slide shaft 9 is axially supported on the bearing in the left-right direction. Suspended vehicles 11, 11 traveling on guide rails 10, 10 provided in the longitudinal direction of the frame are attached. Also, on both sides of the upper end surface of the sliding door 1,
As shown in FIG. 4, support shafts 12 and 12 are provided upright, and an upper guide roller 13 having the support shaft as a rotation center is supported on the support shaft. Each of the ascending guide rollers 13 can travel in a pulling rail 14 fixed to the inner surface of the upper portion of the upper frame 3. The pulling rail has bent portions 14a, 14a, which are bent toward the clean room 5 by a length L at two positions, that is, an intermediate portion and an end portion on the vertical frame 4 side. 2 Pull to the left in the figure, and set the upper and side surfaces of the sliding door to the upper frame 3 and the vertical frame 4
And the airtight material 15 fixed to the door case 2. Further, a means for pulling this sliding door toward the clean room 5 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 surface of the floor 16 on the rear end side of the sliding door 1 in the closed state. 18 is attached, and this lower guide roller is in contact with the outer surface of the lower side of the sliding door. A cam-shaped pulling block 19 on which a lower guide roller 18 slides is fixed to the outer surface of the lower side of the sliding door, as shown in FIG.
The thickness of this pulling block is equal to the bending length L of the bending portion 14a of the pulling rail. The lower guide roller 18 can move from the inclined surface of the drawing block 19 to the drawing surface 19a. In the process of this transition, the sliding door 1 is drawn to the clean room 5 side and can come into close contact with the airtight material 15. The position where the lower guide roller 18 moves to the pulling surface 19a of the block and the position where the upper guide roller 13 moves to the bent portion 14a of the pulling rail are the sliding door 1
Of the upper and lower sides of the sliding door by the pulling rail and the upper guide roller,
The lower pulling of the sliding door by the lower guide roller 18 and the pulling block 19 can be performed simultaneously.

As shown in FIGS. 2 and 3, side pulling blocks 20 are fixed to a plurality of door contact surfaces of the vertical frame 4, and the slanting surfaces 20a provided on the side pulling blocks are provided with the sliding doors 1 of the sliding door 1. The corners of the side surface of the tip end slidably abut. With the closing operation of the sliding door 1, the corner portion of the sliding door abuts the inclined surface 20a, and the inclined side surface slides toward the vertical frame 4 side, so that the sliding door is pulled toward the clean room 5 side. By providing the side pulling block 20, pulling operations of the upper and lower portions of the sliding door 1 can be performed more smoothly. The side pulling means may have a band shape instead of the block shape.

In the lower inner frame 21 at the lower side of the sliding door 1, as shown in FIGS.
The inside of the fixed frame 22 fixed to the lower inner frame is inserted and attached to the lower part of the vertically movable support frame 23. The support frame 23 has three presser pins 24, 24, 24, which penetrate the fixed frame 22,
Are erected at equal intervals, and a coil spring 26 is wound around the pin outer circumference between the head of each pressing pin and the slide plate holding frame 25 of the lower inner frame. This coil spring applies a spring force upward to the presser pin 24, so that the lower airtight member 15a is located above the surface of the floor 16 with a predetermined gap.
The slide plate holding frame 25 is attached to the inner surface of the lower inner frame 21 as shown in FIGS. 2 and 5, and the slide plate 27 can slide in the slide plate holding frame. A pressing cam 28 is provided on the lower surface of the slide plate, and the pressing cam can press the head of the pressing pin 24 downward.
The lower airtight member 15a can be pressed onto the floor 16 by pressing the head portion of the pressing pin. One end of the slide plate 27 connects an L-shaped guide plate 29 provided at a corner of the sliding door 1 to one end of a slidable spring plate 30 as shown in FIGS. The other end of this spring plate is the handle 31 of the door.
A slide plate 2 that moves up and down by the rotating operation (Fig. 1).
It is connected to one end of 7a. Handle 3 and slide plate 2
The interlocking with 7a is performed by using a known interlocking mechanism that converts the rotational movement of a handle such as a pinion and a rack that meshes with the pinion into a linear movement. Therefore, by rotating the handle 31, the slide plates 27a, 27 slide, and as a result, the presser cam 28 presses the presser pin 24 and the lower airtight member 15a descends.

Next, the usage method will be described.

When the sliding door 1 is pulled out from the door pocket 2 toward the vertical frame 4, the suspension vehicle 11 travels on the rail 10, the upper guide roller 13 travels on the drawing rail 14, and finally, immediately before the sliding door closes the door, the fourth As shown in the drawing, the guide roller moves into the bent portion 14a of the pulling rail, and at the same time, the lower guide roller also moves to the pulling surface 19a of the pulling block, and eventually the upper guide roller 13 enters the bent portion and has a length L for the clean room 5. Since it moves to the side, the upper part of the sliding door 1 is forcibly drawn to the clean room side, and the lower guide roller 18 is drawn to the drawing surface 19a of the block.
Since the lower part of the sliding door is forcibly pulled toward the clean room side, and when the sliding door comes into contact with the vertical frame 4 and the door is closed, the upper side portion and both side portions of the sliding door are the upper frame 3 as shown in FIG. , Adheres closely to the vertical frame 4 and the door pocket 2, and the sliding door seals the door of the clean room except the lower side. After that, the handle 31 is turned in the direction of the arrow to move the side slide plate 27a upward, the lower slide plate 27 is moved in the direction of the arrow in FIG. 5, and when the handle is rotated 180 degrees, the presser cam 28 becomes the chain line. As shown, presser pin 24 is pressed downward against the force of spring 26. For this purpose, the lower airtight material 15
a descends together with the support frame 23 and comes into pressure contact with the surface of the floor 16.
As a result, with the door closed, all four sides of the sliding door 1 are in close contact with the upper frame 3, the vertical frame 4, the door bag 2 and the floor 16 through the airtight materials 15 and 15a, and the airtightness of the clean rule 5 is maintained. Hold.

As another example of the upper pulling means, an upper guide roller 1
3 may be provided on the upper frame 3 side, and the pulling rail 14 may be provided on the upper end side of the sliding door 1. Further, a pulling cam may be formed on the inner surface of the rail so that the travel of the upper guide roller can be changed without bending the pulling rail as in the above example.

Further, the airtight materials 15 on the upper and side portions may be attached to the sliding door 1 side as shown in FIGS.

(Effect of the Invention) According to the present invention as described above, in the closed state of the sliding door, the lower airtight member contacts the floor surface, so that the floor surface facing the lower side portion of the sliding door can be made flat, People and carts can move in and out smoothly, and when entering and exiting carts, etc., no human labor is required as in the conventional case, and walking can be done smoothly, and there is no dust problem. The handle of the sliding door facilitates the operation when opening and closing the sliding door, and since it is configured to interlock with the lower airtight material, it can also be used for operating the lower airtight material, and the number of parts can be reduced.

[Brief description of drawings]

FIG. 1 is a front view, and FIG. 2 is a first view of a sliding door at a position indicated by a chain line in FIG.
II-II line enlarged sectional view, FIG. 3 is FIG. 1 III-III line enlarged sectional view, FIG. 4 is an explanatory view showing the positional relationship between the upper guide roller and the pulling rail, and FIG. 5 is a lower airtight member. FIG. 6 is a sectional view showing the pressing means, FIG. 6 is an explanatory view showing a supporting state of the slide plate, FIG. 7 is an enlarged sectional view taken along line VII-VII of FIG. 6, and FIGS. 8 and 9 are upper and side airtight members. It is sectional drawing which shows the other example of attachment. 1 ... Sliding door, 2 ... Door pocket, 3 ... Upper frame, 4 ... Vertical frame, 5 ... Clean room, 10 ... Guide rail, 11 ... Suspended vehicle, 13 ... Upper guide roller, 14 ... Pulling rail , 14a ... bent part, 15 ... lower airtight material, 15a ... lower airtight material, 16 ... floor, 18 ... lower guide roller, 19 ... pulling block, 20 ... side pulling block, 23 ... Support frame, 24 ... Pressing pin, 26 ... Coil spring, 27, 27a ... Slide plate, 28 ... Pressing cam, 30 ... Spring plate, 31 ... Handle.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichiro Tomikawa 4-18-7 Kishimachi, Urawa-shi, Saitama (56) Bibliography 57-16475 (JP, U) 58-85082 JP (JP, U)

Claims (1)

[Claims] 1. A sliding door which is capable of traveling from a door pocket to a vertical frame in a suspended state on an upper frame, and which has a handle for opening and closing operation, and which pulls the sliding door toward the airtight chamber side and the upper side and both sides of the sliding door. A pulling means for bringing the side portion into close contact with the upper frame, the vertical frame and the door pocket; and a lower airtight member attached to the lower side portion of the sliding door so as to be vertically movable over the entire length and with a predetermined gap from the floor surface. And a pressing operation means for pressing the lower airtight material against the floor surface. The pressing operation means is attached to the lower side of the sliding door so as to be vertically movable and supports the lower airtight material. A plurality of presser pins that are erected on the support frame, a spring that biases the support frame upward with a spring force, and a slider that is slidable in the traveling direction of the sliding door above the presser pin head. Slide plate and below this slide plate An airtightness characterized in that the slide head is interlocked with the handle through an interlocking mechanism. door.