JP2020180500A - Door body closing device - Google Patents

Abstract

To provide a door body closing device capable of surely closing an opening by a door body when a blowout panel is pushed outside a facility and becomes detached.SOLUTION: A door body closing device 100 comprises: a door body 10 that closes an opening; an open position holding mechanism 11 that holds the door body in an open position not overlapping with the opening when a blowout panel is in a sealed state; a closed position holding mechanism 12 that holds the door body in a closed position that closes the opening when the blowout panel is in an open state; a hanger rail that suspends the door body from the open position to the closed position; and a guide mechanism that assists a linear motion of the door body 10 when the door body 10 moves in a sliding manner. A plurality of positioning parts 40 are provided in the guide mechanism in different positions from an opening starting end which is an edge of the opening of a building on an open position side of the door body 10. The door body 10 is put in the closed position when all the guide rollers 50 that are provided in the door body 10 in the same number as the positioning part 40 are stored in the positioning part 40.SELECTED DRAWING: Figure 1

Description

The present invention relates to an airtightness maintaining mechanism of a door body for closing an opening when a blowout panel provided in a building of a nuclear power plant or the like is opened.

In the event that the existing blowout panel on the wall surface of the reactor building is opened by high-pressure steam inside the building, a safety device has been developed to close the opening and ensure the airtightness of the reactor building. ..

In Patent Document 1, a blocking door having an area larger than the opening of the building and a sliding mechanism thereof are provided on the outside of the building near the blowout panel, and the blocking door is slid and closed when the BOP is removed. Is disclosed.

Japanese Patent No. 6430055

According to Patent Document 1, the door body is provided with an upper guide so as to sandwich the upper rail, a lower guide is provided so as to sandwich the lower rail, and when the door body comes to a closed position, the vertical press and the side are further provided. The upper and lower cams and side cams are provided so that they are pushed by the seal material by the presser, and the upper and lower rails are provided with notches so that the upper and lower guides can be pulled out when the door body suspended from the arm is pressed against the seal material. There is.

This structure has a problem that it is not easy because a force for escaping the notch is required when the door body is returned from the closed position to the open position again. Further, when the door body is closed, the force applied to the guide is directly applied to the sealing material, which may shorten the life of the sealing material.

The present invention has been made to solve the above-mentioned problems, and when the pressure inside a facility such as a nuclear facility rises and the blowout panel is pushed out of the facility and comes off, the opening thereof is opened as a door body. It is an object of the present invention to provide a door body closing device that can be closed more reliably.

In order to achieve the above object, the door body closing device of the present invention is a door body closing device that closes the opening that occurs when the blowout panel that closes the opening of the building is opened. The door body that closes the door, the open position holding mechanism that holds the door body in the open position that does not overlap the opening when the blowout panel is in the closed state, and the closing that closes the opening when the blowout panel is in the open state. Includes a closed position holding mechanism that holds the door body in position, a hanger rail that suspends the door body from the open position to the closed position, and a guide mechanism that assists the linear movement of the door body when the door body slides. A plurality of positioning parts are arranged in the guide mechanism at different positions from the opening opening end, which is the end of the opening of the building on the open position side of the door body, and the same number of positioning parts are attached to the door body. It is characterized in that the door body is in the closed position when all the guide rollers are housed in the positioning portion. Other aspects of the present invention will be described in embodiments described below.

According to the present invention, when the pressure inside a facility such as a nuclear facility rises and the blowout panel is pushed out of the facility and comes off, the opening can be reliably closed by the door body.

It is a front view which shows the state which the door body which concerns on this embodiment is closed. It is a perspective view which shows the state which the door body which concerns on this embodiment is open. It is a perspective view which shows the state which the door body which concerns on this embodiment is closed. It is a top view in the state which the door body which concerns on this embodiment is closed. It is a side view in the state which the door body which concerns on this embodiment is closed. It is the right side view which enlarged the guide rail part of the door body which concerns on this embodiment. It is a perspective view which shows the drive device of the door body which concerns on this embodiment, (a) is an overall view of the door body closing device, (b) is an enlarged view of part A. It is explanatory drawing which shows the guide mechanism of the door body which concerns on this embodiment. It is an enlarged explanatory view of the positioning part of the guide mechanism of the door body which concerns on this embodiment. It is explanatory drawing which further expanded the positioning part of the guide mechanism of the door body which concerns on this embodiment. It is an enlarged perspective view of the positioning part of the guide mechanism of the door body which concerns on this embodiment, (a) is an overall view of the door body closing device, (b) is an enlarged view of part B. It is explanatory drawing which shows the arrangement structure of the positioning part of the guide rail and the guide roller which concerns on this embodiment. It is explanatory drawing which shows the positioning part of the guide rail which concerns on this embodiment, and other arrangement configurations of a guide roller. It is explanatory drawing which shows the structure of the positioning part of the guide rail which concerns on this embodiment. It is explanatory drawing which shows the protection of the sealing material which concerns on this embodiment, (a) and (b) are the state which the door body is moving toward a closing position, (c) is the state which a door body is in a closed position. Is.

Embodiments for carrying out the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 is a front view showing a state in which the door body 10 according to the present embodiment is closed. FIG. 2 is a perspective view showing a state in which the door body 10 according to the present embodiment is open. FIG. 3 is a perspective view showing a state in which the door body 10 according to the present embodiment is closed. FIG. 4 is a plan view of the door body 10 according to the present embodiment in a closed state. FIG. 5 is a side view of the door body 10 according to the present embodiment in a closed state. In FIG. 2, the outside of the building is the front and the inside of the building is the back.

The door body closing device 100 of the present embodiment is a device that closes the opening 220 of the building that occurs when the blowout panel (not shown) that closes the opening 220 of the building is opened. The door closing device 100 includes an upper frame FU, a lower frame FD, a right frame FR, and a left frame FL.

The door body closing device 100 includes a door body 10 that closes the opening 220 of the building and an open position holding mechanism that holds the door body 10 in an open position that does not overlap the opening 220 of the building when the blowout panel is in a sealed state. 11, a closed position holding mechanism 12 that holds the door body 10 in a closed position that closes the opening 220 of the building when the blowout panel is open, and a hanger rail that suspends the door body 10 from the open position to the closed position. A guide mechanism 30 (see FIG. 8) that assists the linear movement of the door body 10 when the door body 10 slides and moves, a drive device 65 for opening and closing the door body 10, and the like are provided.

A plurality of positioning portions 40 are arranged in the guide mechanism 30 (see FIG. 8) at positions different from the opening opening end portion 221 which is the end portion of the opening 220 of the building on the open position side of the door body 10 shown in FIG. When all the guide rollers 50 attached to the door body 10 in the same number as the positioning portions 40 are housed in the positioning portion 40, the door body 10 is in the closed position shown in FIG.

As shown in FIG. 1, the door body 10 is a metal plate or the like that is one size larger than the opening 220 of the building. The door body 10 is provided by the drive device 65 in a range from an open position that does not completely overlap the opening 220 of the building (see FIG. 2) to a closed position that completely overlaps the opening 220 of the building (see FIG. 3). It can be slid (for example, moved in the left-right direction) along the wall 200 of the building.

The upper frame FU and the lower frame FD are supported from above and below so that the door body 10 does not come off, and the open position holding mechanism 11 arranged in the right frame FR holds the door body 10 in the open position. The closed position holding mechanism 12 arranged on the left frame FL holds the door body 10 in the closed position.

The opening 220 of the building has a sealing material 80 that maintains airtightness at the contact portion between the opening 220 of the building and the door 10 when the door 10 reaches the closed position. The sealing material 80 is attached to the surface of the wall 200 of the building so as to surround the opening 220 of the building, and comes into contact with the peripheral edge of the back surface of the door body 10 when the door body 10 comes to the closed position. When the sealing material 80 is attached to the back surface of the door body 10, it is difficult to maintain the sealing material 80 unless the door body 10 is removed (especially in a high place or when there is weight), but the opening 220 of the building If it is around, the maintenance of the sealing material 80 is easy at the open position.

FIG. 6 is an enlarged right side view of the guide rail portion of the door body 10 according to the present embodiment. The hanger rail 20 suspends the door body 10 via the suspending portion 60. The hanging portion 60 has a hanger roller 52, link mechanisms 61 and the like at two upper and lower positions. Further, when all the guide rollers 50 are located at the corresponding positioning portions 40 (see FIG. 1), the guide rollers 50 do not separate the door body 10 from the positioning portion 40, and the door body 10 is placed on the building. It has a pressing mechanism 70 that moves and presses in parallel to the floor surface of the building so as to press against the peripheral edge (sealing material 80) of the opening 220.

The pressing mechanism 70 is composed of a taper block 71 arranged on the door body 10 side and a push roller 72 arranged on the upper frame FU side and the lower frame FD side. Details of the pressing mechanism 70 will be described later with reference to FIG.

Further, the guide roller 50 arranged on the door body 10 side can sandwich the upper guide rail 31 and slide the door body 10 in the left-right direction without shifting in the front-rear direction of the upper guide rail 31. it can. When the guide roller 50 comes to the position of the positioning portion 40 (see FIG. 1), it is in a state of being pressed by the pressing mechanism 70 as shown in FIG.

In the open position, the hanging portion 60 hangs down due to the weight of the door body 10, but in the closed position, the door body 10 is pressed against the sealing material 80 by the pressing mechanism 70 to be rearward (in FIG. 6). It will be in a state shifted to the right). Here, the door body 10 pressed by the pressing mechanism 70 can be displaced rearward by an appropriate distance to press the door body 10 against the sealing material 80 provided in the opening 220 of the building with an appropriate pressure.

7A and 7B are perspective views showing a driving device 65 of the door body 10 according to the present embodiment, FIG. 7A is an overall view of the door body closing device 100, and FIG. 7B is an enlarged view of part A. An electric drive chain is arranged on the upper part of the door body 10 (not shown). The door body 10 moves in the left-right direction by pulling the chain in the rotation direction of the drive device 65. When rotated clockwise, the door body 10 moves in the open position direction, and when rotated counterclockwise, the door body 10 moves in the closed position direction.

To further explain the structure, a drive rail connected to the door body 10 is laid, a chain is stretched on the drive rail, and the drive source gear is hung. When the motor is driven to rotate the drive source gear, the door body 10 moves together with the chain to be sent.

FIG. 7A shows the management device 110. The management device 110 detects whether the blowout panel is in the closed state or the open state, holds and operates the open position holding mechanism 11 when the blowout panel is in the closed state, and holds the open position when the blowout panel is opened. The mechanism 11 is released, and the drive device 65 connected to the hanging portion 60 (see FIG. 5) is driven to slide the door body 10 to the closed position to hold the closed position holding mechanism 12. It is preferable that the drive can be performed even when the power supply or the like is lost.

Next, the guide mechanism 30 and the positioning unit 40 will be described.
FIG. 8 is an explanatory view showing a guide mechanism 30 of the door body 10 according to the present embodiment. FIG. 9 is an enlarged explanatory view of the positioning portion 40 of the guide mechanism 30 of the door body 10 according to the present embodiment. FIG. 10 is an enlarged explanatory view of the positioning portion 40 of the guide mechanism 30 of the door body 10 according to the present embodiment. 11A and 11B are enlarged perspective views of the positioning portion 40 of the guide mechanism 30 of the door body 10 according to the present embodiment, FIG. 11A is an overall view of the door body closing device 100, and FIG. 11B is an enlarged view of the B portion. is there. In addition, FIG. 1 and FIG. 6 are referred to as appropriate.

The guide mechanism 30 extends from at least the opening start end portion 221 (see FIG. 1) to the opening end portion, which is the end portion of the opening 220 of the building on the closed position side of the door body 10, respectively, at the upper part and the lower part of the door body 10. An upper guide rail 31 to be extended and a lower guide rail 32 are provided. On the upper guide rail 31, at least three positioning portions 40 having different positions from the opening opening end portion 221 and different intervals from each other are provided. Similarly, the lower guide rail 32 has the same number of positioning portions 40 as the positioning portions 40 on the upper guide rail 31.

FIG. 8 shows four positioning units 40. Further, the four positioning portions 40 are located on the upper guide rail 31 at different positions from the opening opening end portion 221 and at intervals d1, d2, d3. The upper part of the door body 10 is provided with the same number of guide rollers 50 as the respective positioning portions 40, and sandwiches the upper guide rail 31. This makes it possible to prevent the guide roller 50 from coming off from the upper guide rail 31 when the door body 10 slides from the open position to the closed position. Similarly, it is possible to prevent the guide roller 50 from coming off from the lower guide rail 32. Details will be described later with reference to FIG.

As shown in FIGS. 10 and 11, the positioning unit 40 receives and stores the guide roller 50 including the introduction unit 41 that tilts and moves the guide roller 50 when the door body 10 reaches the vicinity of the closed position. It has 42. The storage portion 42 has a notch, and the notch width is smaller than the diameter of the guide roller 50. That is, the guide roller 50 has a structure that does not come off from the upper guide rail 31. Similarly, the guide roller 50 has a structure that does not come off from the lower guide rail 32.

Further, when the door body 10 is moved to the open position, the guide roller 50 can be moved along the introduction portion 41 which is an inclined portion. As a result, when the door body 10 is returned from the closed position to the open position again, it can be easily moved without requiring a force for escaping the notch, which has been a problem in the past.

As shown in FIGS. 10 and 11, the pressing mechanism 70 includes a taper block 71 arranged on the door body 10 side and a push roller 72 arranged on the upper frame FU side as described above. .. Further, a pressing mechanism 70 is similarly arranged on the lower frame FD side.

The push roller 72 is arranged so as to match the position of the taper block 71 of the door body 10 in the closed position. The taper block 71 has a tapered shape (tapered) on the left side. When the push roller 72 is placed on the flat surface after the tapered surface when approaching the closed position, the door body 10 is moved rearward, and the guide roller 50 enters the storage portion 42. That is, the door body 10 is pushed backward and pressed against the sealing material 80.

As shown in FIGS. 8 and 9, four pressing mechanisms 70 are arranged corresponding to the four positioning portions 40. As a result, the guide rollers 50 are surely stored in the respective positioning portions 40.

FIG. 12 is an explanatory view showing an arrangement configuration of a guide rail positioning portion 40 and a guide roller 50 according to the present embodiment, (a) and (b) are comparative examples, and (c) is an embodiment. In FIG. 8, an example in which at least three positioning portions 40 having different positions from the opening start end portion 221 (see FIG. 1) and different intervals from each other are provided on the upper guide rail 31 and the lower guide rail 32. Was shown. The reason for this will be described with reference to FIG.

FIG. 12A shows a case where the positioning portions 40 are located at two upper and lower positions and the upper and lower positioning portions 40 are at the same vertical line position as a comparative example. In the figure, the upper and lower positioning portions 40 show only one upper and lower position due to the relationship shown in the figure. In this case, when the door body 10 slides from the open position to the closed position and the guide roller 50 enters the first positioning portion 40, the door body rotates from the upper guide rail 31 and the lower guide rail 32. The guide roller 50 may come off.

FIG. 12B shows, as a comparative example, a case where the positioning portions 40 are located at three upper and lower positions and the upper and lower positioning portions 40 are at equal vertical positions at equal intervals. In the figure, the upper and lower positioning portions 40 are shown only at two upper and lower positions for the sake of illustration. In this case, when the door body 10 slides from the open position to the closed position, if the arrangement positions of the positioning portions 40 are equal (equally spaced), the first positioning portion 40 and the next positioning portion 40 are guided by the guide rollers. When 50 is inserted, the door body rotates, and the guide roller 50 may come off from the upper guide rail 31 and the lower guide rail 32.

FIG. 12C shows, as an example, a case where the positioning portions 40 are located at three upper and lower positions and the upper and lower positioning portions 40 are at the same vertical line position at not equal intervals. In the figure, the upper and lower positioning portions 40 are shown only at two upper and lower positions for the sake of illustration. Since the positioning positions of the positioning portions 40 are different (not at equal intervals), the guide rollers 50 can be sandwiched by at least two upper and lower positions, the door body 10 does not rotate, and the door body 10 can be reliably slid and moved. it can.

Further, in the case of FIG. 12C, the notch width of the positioning portion 40 is smaller than the diameter of the guide roller 50. That is, the guide roller 50 has a structure that does not come off from the upper guide rail 31 and the lower guide rail 32.

13A and 13B are explanatory views showing another arrangement of the guide rail positioning portion 40 and the guide roller 50 according to the present embodiment, in which FIG. 13A is a comparative example and FIG. 13B is an embodiment. FIG. 8 shows an example in which the upper guide rail 31 and the lower guide rail 32 have at least three positioning portions 40 having different positions from the opening start end portion 221 and different intervals from each other. However, it is not limited to this. It will be described that this can be realized even with the positioning portions 40 at two locations.

FIG. 13A is a comparative example and is the same as FIG. 12A. That is, in this case, when the door body 10 slides from the open position to the closed position and the guide roller 50 enters the first positioning portion 40, the door body rotates, and the upper guide rail 31 and the lower guide rail The guide roller 50 may come off from 32.

FIG. 13B shows, as an example, a case where the positioning portions 40 are located at two upper and lower positions and the upper and lower positioning portions 40 are located at different positions from the same vertical line. In the figure, the upper and lower positioning portions 40 show only one upper and lower position due to the relationship shown in the figure. In this case, even if one set of guide rollers 50 comes to the first positioning portion 40 when the door body 10 slides from the open position to the closed position, the remaining three sets of guide rollers 50 are the upper guide rails. 31. The lower guide rail 32 is sandwiched, and the door body 10 does not rotate, and the door body 10 can be reliably slid and moved. That is, when the guide rollers 50 at least three places above and below are sandwiched, the door body 10 does not rotate and the door body 10 can be reliably slid and moved.

Further, in the case of FIG. 13B, the notch width of the positioning portion 40 is smaller than the diameter of the guide roller 50. That is, the guide roller 50 has a structure that does not come off from the upper guide rail 31 and the lower guide rail 32.

FIG. 14 is an explanatory view showing the structure of the positioning portion 40 of the guide rail according to the present embodiment. In FIG. 10, No. 14 of FIG. 14 is shown. In the case of No. 2, an example having an introduction portion 41 that moves in an inclined manner and a notch is shown, but the present invention is not limited to this. A comparative example is a case where the conventional notch width is larger than the diameter of the guide roller 50. In this case, the guide function is completely free.

No. 14 in FIG. 1 to 4 are the cases of Examples. No. 1 is a case where the introduction portion 41 and the flat portion 43 that move in an inclined manner are provided. No. Reference numeral 3 denotes a latter half having the same shape as the introduction portion 41 that moves in an inclined manner. That is, it has an inverted V shape. No. 4 has an introduction portion 41 that moves in an inclined manner and an arc shape in the latter half. No. 1-No. In the case of 4, the guide roller 50 has a structure that does not come off from the upper guide rail 31 and the lower guide rail 32.

Further, when the door body 10 is moved to the open position, the guide roller 50 can be moved along the introduction portion 41 which is an inclined portion. As a result, when the door body 10 is returned from the closed position to the open position again, it can be easily moved without requiring a force for escaping the notch, which has been a problem in the past.

In the present invention, when the door body 10 is closed, the force applied to the guide is directly applied to the sealing material 80 to prevent the sealing material 80 from shortening its life. The preventive measures will be described with reference to FIG.

15A and 15B are explanatory views showing protection of the sealing material 80 according to the present embodiment, in which FIG. 15A and FIG. 15B are states in which the door body 10 is moving toward the closing position, and FIG. 15C is a door body. 10 is in the closed position. Refer to FIGS. 1 and 10 as appropriate. FIG. 15 is a principle diagram, and the positional relationship between the taper block 71 with respect to the door body 10 and the push roller 72 with respect to the door body 10 is different from the arrangement position with respect to FIG. 1, but the operating principle is the same as that of FIG. is there.

As shown in FIG. 15, similarly to FIG. 10, the positioning portion 40 receives and stores the guide roller 50 including the introduction portion 41 that tilts and moves the guide roller 50 when the door body 10 reaches the vicinity of the closed position. It has a storage unit 42 to be used. The storage portion 42 has a notch, and the notch width is smaller than the diameter of the guide roller 50. That is, the guide roller 50 has a structure that does not come off from the lower guide rail 32.

As described above, the push roller 72 is arranged in accordance with the position of the taper block 71 of the door body 10 in the closed position. The taper block 71 has a tapered shape (tapered) on the left side. As shown in FIG. 15B, when the push roller 72 is placed on the tapered surface when approaching the closed position, the door body 10 is moved rearward.

Then, as shown in FIG. 15C, the guide roller 50 enters the storage portion 42. When the door body 10 is in the closed position, the storage portion 42 limits the operating range of the guide roller 50 in the left-right direction, and suppresses unnecessary force on the sealing material 80 due to external pressure. That is, the guide roller 50 does not come off from the lower guide rail 32, and the door body 10 can be pressed against the sealing material 80 with an appropriate pressure. Therefore, when the pressure inside a facility such as a nuclear facility rises and the blowout panel is pushed out of the facility and comes off, the opening 220 of the building is closed to the door body 10 with an appropriate pressure without crushing the sealing material 80. It can be closed more securely.

10 Door body 11 Open position holding mechanism 12 Closed position holding mechanism 20 Hanger rail 30 Guide mechanism 31 Upper guide rail 32 Lower guide rail 40 Positioning part 41 Introducing part 42 Storage part 43 Flat part 50 Guide roller 52 Hanger roller 60 Hanging Part 61 Link mechanism 65 Drive device 70 Pressing mechanism 71 Tapered block 72 Push roller 80 Sealing material 100 Door closing device 110 Management device 200 Building wall 220 Building opening 221 Opening start end FD Lower frame FL Left frame FR Right frame FU top frame

In order to achieve the above object, the door body closing device of the present invention is a door body closing device that closes the opening that occurs when the blowout panel that closes the opening of the building is opened. The door body that closes the door, the open position holding mechanism that holds the door body in the open position that does not overlap the opening when the blowout panel is in the closed state, and the closing that closes the opening when the blowout panel is in the open state. Includes a closed position holding mechanism that holds the door body in position, a hanger rail that suspends the door body from the open position to the closed position, and a guide mechanism that assists the linear movement of the door body when the door body slides. The guide mechanism is provided with a plurality of positioning portions at different positions from the opening opening end, which is the end of the opening of the building on the open position side of the door body, and the guide mechanism is provided at the upper part and the lower part of the door body. Each has an upper guide rail and a lower guide rail extending from at least the opening opening end to the opening end portion of the building on the closed position side of the door body, and on the upper guide rail. It has at least three positioning parts at different positions from the opening opening end and at different intervals, and has the same number of positioning parts on the lower guide rail as the positioning parts on the upper guide rail. The upper and lower parts of the door body include a guide roller that is provided with the same number as the respective positioning parts and holds the guide rail, and the positioning part includes the guide roller when the door body reaches the vicinity of the closed position. It has a storage part that receives and stores a guide roller including an introduction part that tilts and moves, and the opening maintains airtightness at the contact portion between the opening and the door body when the door body reaches the closed position. It has a sealing material, Ri Do door body by all the guide roller mounted the same number as the positioning portion on the door body is accommodated in the positioning unit is a closed position, when the door body is in the closed position, housing The feature is that the operating range of the guide roller in the left-right direction is limited by the part, and unnecessary force on the sealing material due to external pressure is suppressed . Other aspects of the present invention will be described in embodiments described below.

Claims (8)

A door body closing device that closes the opening that occurs when the blowout panel that closes the opening of the building is opened.
A door body that closes the opening and
An open position holding mechanism that holds the door body in an open position that does not overlap the opening when the blowout panel is in a sealed state.
A closed position holding mechanism that holds the door body in a closed position that closes the opening when the blowout panel is in the open state.
A hanger rail that suspends the door body from the open position to the closed position,
A guide mechanism that assists the linear motion of the door body when the door body slides and moves,
Including
A plurality of positioning portions are arranged in the guide mechanism at different positions from the opening opening end portion, which is the end portion of the opening position side of the door body.
A door body closing device, characterized in that the door body is brought into the closed position by accommodating all the guide rollers attached to the door body in the same number as the positioning portions. The guide mechanism extends from the opening end end of the opening to the end of the opening of the building on the closed position side of the door, respectively, at the upper part and the lower part of the door body. Equipped with a guide rail and a lower guide rail,
On the upper guide rail, there are at least three positioning portions having different positions from the opening opening end and different intervals from each other.
The door closing device according to claim 1, wherein the lower guide rail has the same number of positioning portions as the positioning portions on the upper guide rail. The guide mechanism extends from the opening end end of the opening to the end of the opening of the building on the closed position side of the door, respectively, at the upper part and the lower part of the door body. Equipped with a guide rail and a lower guide rail,
The upper guide rail has at least two positioning portions having different arrangement positions from the opening opening end portion, and the lower guide rail has the same positioning portion on the upper guide rail. The door closing device according to claim 1, wherein the same number of positioning portions are provided at different positions from the vertical portions. The upper part and the lower part of the door body include guide rollers provided in the same number as the positioning portions and sandwiching the guide rails.
2. The positioning portion has a storage portion that receives and stores the guide roller, including an introduction portion that tilts and moves the guide roller when the door body reaches the vicinity of the closed position. Alternatively, the door closing device according to claim 3. The hanger rail suspends the door body via a hanging portion.
The hanging portion has link mechanisms at two positions above and below, and when all the guide rollers are located at the corresponding positioning portions, the guide rollers are not separated from the positioning portion and the door is not separated. The door body closing device according to claim 1, further comprising a pressing mechanism that moves and presses the body in parallel with the floor surface of the building so as to press the body against the peripheral edge of the opening. The first aspect of claim 1, wherein the opening has a sealing material that maintains airtightness at a contact portion between the opening and the door when the door reaches the closed position. Door closing device. The opening has a sealing material that maintains airtightness at the contact portion between the opening and the door body when the door body reaches the closed position.
4. The fourth aspect of the present invention is characterized in that, when the door body is in the closed position, the storage portion limits the operating range of the guide roller in the left-right direction and suppresses unnecessary force on the sealing material due to external pressure. The door body closing device described. The door closing device includes a management device and
The management device detects whether the blowout panel is in the closed state or the open state, holds and operates the open position holding mechanism when the blowout panel is in the closed state, and when the blowout panel is opened. It is characterized in that the open position holding mechanism is released and the driving device connected to the hanging portion is driven to slide the door body to the closed position to hold the closed position holding mechanism. The door closing device according to claim 5.

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