JP2008285987A - Fire door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire door provided with a wicket door, which is openable in two directions to allow two-directional escape, and movable to a close position without pushing to be used as a fire wall by balancing elastic bodies of upper and lower hinges of the wicket door to thereby move the wicket. <P>SOLUTION: The fire door comprises a wicket door 2 allowing passing through, which is provided on a main body door 1 through a hinge 3. The wicket door 2 is connected to the main body door 1 through the vertically provided first hinge 3A and a second hinge 3B to be openable to both sides. The first hinge 3A and the second hinge 3B include rotary elastic bodies 13 for elastically driving the wicket door 2 from an open position to a close position. The first hinge 3A and the second hinge 3B drive the wicket door 2 in opposite directions by the built-in rotary elastic bodies 13, and the rotary elastic bodies 13 of the first hinge 3A and the second hinge 3B are balanced to dispose the wicket door 2 in a close position of the main body door 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fire door having a hollow door on a main body door, and more particularly, to a fire door capable of opening the hollow door in both directions.

  Fire doors have been developed with a door in the main door. The fire door is connected to the main body door by a hinge so that the door can be pushed and opened. The door is connected to the main door with a hinge that opens when pushed into one side. Further, the hinge includes a spring that automatically closes when the push of the underdoor is stopped. This fire door can evacuate in a specific direction by opening the door in a closed state after detecting a fire. Moreover, after evacuating, it is not necessary to close the door, but it is automatically closed by a hinge spring to act as a fire wall. However, since this fire door has a structure in which it is pushed open to one side and is closed when the push is stopped, when it tries to move in a direction opposite to a specific direction, it cannot be pulled open. For this reason, there is a drawback that it is not possible to evacuate by passing through the door in both directions.

This drawback can be solved as a structure in which the door is opened in both directions. Doors that can be opened in both directions have been developed. (Patent Document 1)
Japanese Patent Laid-Open No. 10-196241

  The door described in Patent Document 1 is connected via a unique hinge that can be opened in both directions. This door has a door knob fixed on both sides, and the door knob can be rotated to open the door to both sides. However, this structure cannot be used for a fire door. This is because the door must automatically move to the closed position when it stops pushing.

The present invention was developed for the purpose of solving the drawbacks of conventional fire doors, and an important object of the present invention is to open the doors in both directions and evacuate in both directions, and above and below the doors. Provided a fire door that can be used as a fire wall with a simple structure by moving the non-pushing door to the closed position by balancing the elastic body of the fixed hinge and moving the door to the closed position. There is.
Furthermore, another important object of the present invention is to provide a fire door that can be surely moved to a closed position with a simple structure of a door that is provided so as to open in both directions.

The fire door of the present invention has the following configuration in order to achieve the above-described object.
The fire door is provided with a hollow door 2 that can pass through the main door 1 via a hinge 3. The hollow door 2 is connected to the main body door 1 through a first hinge 3A and a second hinge 3B provided on the upper and lower sides so that both sides can be opened and closed. The first hinge 3 </ b> A and the second hinge 3 </ b> B include a rotating elastic body 13 that elastically drives the hollow door 2 from the open position to the closed position. The first hinge 3 </ b> A and the second hinge 3 </ b> B are driven by the built-in rotary elastic body 13 in the opposite direction, and the rotary elastic bodies 13 of the first hinge 3 </ b> A and the second hinge 3 </ b> B are Balance and place the door 2 in the closed position of the main body door 1.

  The fire door according to claim 2 of the present invention is provided with a stopper mechanism 30 between the hollow door 2 and the main body door 1 for stopping the hollow door 2 in the closed position. This fire door stops the underdoor 2 at the closed position of the main body door 1 by the stopper mechanism 30.

  The fire door according to claim 3 of the present invention is such that the stopper mechanism 30 is provided with a recess 31 provided on the facing surface of the underdoor 2 and the main body door 1, a protrusion 32 inserted into and retracted from the recess 31, and the protrusion And a pressing elastic body 33 that elastically pushes 32 toward the concave portion 31. Further, the stopper mechanism 30 has a protruding portion 32 as a vertically long protruding strip 32A, and a recessed portion 31 as a guide groove 31A for guiding the protruding strip 32A. The width of the guide groove 31A is wider than the width of the ridge 32A, and the ridge 32A is vertically inclined in the width direction of the guide groove 31A. Further, the width of the guide groove 31A is made to be the entire inclined ridge 32A. The width can be guided. This fireproof door guides the protrusion 32 elastically pushed out by the pressing elastic body 33 to the recess 31, and stops the underdoor 2 at the closed position of the main body door 1.

  The fire door according to claim 4 of the present invention comprises a magnet 40 having a stopper mechanism 30 disposed on the facing surface of the bore door 2 and the main body door 1, and the lower door 2 is connected to the main body door 1 by the attractive force of the magnet 40. It is stopped at the closed position.

  The fire door according to claim 5 of the present invention is provided so that the through door 2 that can pass through is opened to the opening 1 </ b> A of the main body door 1 through the hinge 3. Further, the fire door is provided with a stopper mechanism 30 that stops the underdoor 2 in the closed position between the underdoor 2 and the main body door 1, and with this stopper mechanism 30, the underdoor 2 is closed with the main body door 1. Stopped in position. The stopper mechanism 30 includes a recess 31 provided on the facing surface of the underdoor 2 and the main body door 1, a protrusion 32 that is inserted into and retracted from the recess 31, and the protrusion 32 elastically toward the recess 31. A pressing elastic body 33 is provided. The protruding portion 32 is a vertically long ridge 32A, and the recessed portion 31 is a guide groove 31A for guiding the ridge 32A. The width of the guide groove 31A is wider than the width of the ridge 32A, and the protrusion 32A is The upper and lower sides are inclined in the width direction of the guide groove 31 </ b> A, and the width of the guide groove 31 </ b> A is set to a width that can guide the entire inclined ridge 32 </ b> A. The fire door guides the protruding portion 32 elastically pushed out by the pressing elastic body 33 to the recessed portion 31, and stops the underdoor 2 at the closed position of the main body door 1.

  The fire door according to claim 6 of the present invention is provided with a recess 31 in the underdoor 2 and a ridge 32 </ b> A on the opposing surface of the main body door 1. Further, according to the fire door of claim 7 of the present invention, the hollow door 2 has the concave portions 31 on both side surfaces and the upper side surface, and the main body door 1 is provided inside the open door 2 inside the opening 1A. Convex strips 32A are provided on the inner surface on both sides and the lower surface on the upper side, which are opposed to the recessed portion 31. Furthermore, the fire door of Claim 8 of this invention has arrange | positioned the protrusion 32A provided in the lower surface of the upper side of 1 A of opening parts of the main body door 1 inclining toward a longitudinal direction. Furthermore, in the fireproof door of claim 9 of the present invention, the ridge 32A provided on the inner surface of both sides of the opening 1A at both ends thereof is provided with the ridge 32A provided on the lower surface on the upper side of the opening 1A of the main body door 1. It arrange | positions in the position connected with the upper end of.

  The fire door according to claim 10 of the present invention includes a main shaft 11 that connects the underdoor 2 to the main body door 1 and a bearing fitting 50 that is fixed to the main body door 1 and connects the main shaft 11 of the hinge 3. . The bearing bracket 50 includes an adjustment base 51 having a non-rotating hole 51a for connecting the tip connection portion 11A of the main shaft 11 so as not to rotate, and a support portion 50A for connecting the adjustment base 51 so as to be rotatable in a horizontal plane. , And a lock bolt 52 for rotating the adjustment base 51 to a predetermined position and fixing it to the support portion 50A.

  Furthermore, the fire door of claim 11 of the present invention has an adjustment surface 53 parallel to the tangential direction with respect to the rotation direction of the adjustment table 51 on the outer peripheral surface of the adjustment table 51. , And the adjustment base 51 is fixed while rotating with respect to the support portion 50A. Further, in the fire door according to claim 12 of the present invention, the outer periphery of the adjustment base 51 is formed in a shape in which the adjustment surface 53 is provided by cutting away the opposite surface of the circle in a direction parallel to the tangential direction. The lock bolt 52 is provided in the position which presses the both ends.

  The fire door of the present invention can push the open doors in both directions and evacuate in both directions, and after passing through the open doors, returns to the closed position with an elastic body, so that the fire doors do not return to the closed position. There is a feature that can be used as. In addition, the special feature of the present invention is that the elastic body of the hinge fixed at the top and bottom of the sliding door is balanced and the sliding door is moved to the closed position. It can be moved and used as a fire wall. This feature is that the first and second hinges are connected to each other so that the first and second hinges can be opened and closed on both sides of the main body door. This is because a rotary elastic body that drives the two in opposite directions is provided, and the rotary doors are arranged at the closed position of the main body door by balancing the rotary elastic bodies of the first hinge and the second hinge.

  Furthermore, the fire door of claim 2 of the present invention is provided with a stopper mechanism for stopping the closed door in the closed position between the closed door and the main body door in addition to the structure of claim 1. The undercarriage is stopped at the closed position of the main body door. The fire door of this structure has a feature that the underdoor can be accurately stopped at the closed position.

  According to a third aspect of the present invention, in addition to the construction of the second aspect, the fire door according to the present invention is provided with a guide groove and a protrusion that is inserted into and removed from the guide door on the facing surface of the underdoor and the main body door. A pressing elastic body is provided so as to elastically push the ridge toward the guide groove, the ridge is guided to the guide groove with the pressing elastic body, and the hollow door is stopped at the closed position of the main body door. Further, the fire door has a width of the guide groove wider than that of the ridge, and the ridge is inclined in the width direction of the guide groove up and down, and the width of the guide groove is further inclined. The width can be guided. This fireproof door does not guide the entire ridge to the guide groove, but partially guides the ridge to the guide groove, and puts the whole into the guide groove. This fire-proof door can guide the ridge to the guide groove by weakening the rotational force that moves the underdoor to the closed position as compared with the structure in which the entire ridge is guided to the guide groove at a time. For this reason, the feature which can guide a convex line smoothly to a guide groove, and can stop a hollow door correctly in a closed position with a stopper mechanism is realized.

  Furthermore, in the fire door of claim 4 of the present invention, in addition to the structure of claim 1, a magnet disposed on the facing surface of the underdoor and the main body door is provided in the stopper mechanism, and the magnet is attracted. Use force to stop the door in the closed position. Since the magnet attracts stronger as it approaches, the rotary door of the first hinge and the second hinge can be moved to the closed position so that the closed door can be accurately stopped at the closed position.

  Further, the fire door according to claim 5 of the present invention has a feature that the underdoor provided to open in both directions via the hinge can be reliably moved to the closed position with a simple structure. The fire door of the present invention is provided with a stopper mechanism that stops the closed door in the closed position between the hollow door and the main body door. With this stopper mechanism, the lower door is stopped in the closed position of the main door. Because. In particular, this fire door is provided with a stopper mechanism, a recess that is a guide groove provided on the facing surface of the underdoor and the main body door, a protrusion that is a protrusion that is inserted into and removed from this recess, and the protrusion is elastic. And a pressing elastic body that pushes toward the recess, the width of the guide groove is wider than the width of the ridge, and the ridge is inclined up and down in the width direction of the guide groove. The width is such that the entire inclined ridge can be guided. In the fire door having this structure, the protruding portion elastically pushed by the pressing elastic body can be guided to the concave portion, and the door can be accurately stopped at the closed position by the stopper mechanism. Furthermore, since this fire door is inclined in the width direction of the guide groove up and down the ridge, while guiding the ridge partially to the guide groove without simultaneously guiding the entire ridge to the guide groove, The whole can be put in the guide groove. Therefore, as compared with a structure in which the entire ridge is guided to the guide groove at a time, the rotational force for moving the hollow door to the closed position can be weakened and the ridge can be guided to the guide groove. For this reason, the feature which can guide a convex line smoothly to a guide groove, and can stop a hollow door correctly in a closed position with a stopper mechanism is realized.

  Furthermore, the fire door according to claim 7 of the present invention has recesses on both side surfaces and the upper side surface of the door, and the inner side of the opening of the main body door is a surface facing the recess provided in the door. Since the ridges are provided on the inner surface on both sides and the lower surface on the upper side, it is possible to more reliably stop the closed door at the closed position by the stopper mechanisms provided on the three sides excluding the lower end of the lower door. In particular, the stopper mechanism that makes the protruding part a long ridge and guides the ridge to the recess is a wide gap between the opening of the main body door and the hollow door in the closed position. It has a feature that it can be blocked without any smoke and gas can be effectively prevented from passing through.

  Furthermore, since the fireproof door of claim 8 of the present invention is provided with the ridges provided on the lower surface on the upper side of the opening of the main body door so as to be inclined in the longitudinal direction, It can be smoothly guided to the recess with a weak rotational torque. For this reason, even if rotational torque becomes weak, a convex line can be reliably guided to a recessed part and a hollow door can be moved to the closed position of a main body door.

  Furthermore, in the fire door of claim 9 of the present invention, both ends of the ridge provided on the lower surface of the upper side of the opening of the main body door are connected to the upper end of the ridge provided on the inner surfaces on both sides of the opening. Since it is arranged at the position, the boundary portions of these ridges are connected in a continuous state, and it is possible to effectively prevent a gap from being formed in this portion and to realize excellent smoke shielding performance.

  Furthermore, the fire door of claim 10 of the present invention comprises a main shaft that connects the underdoor to the main body door, and a bearing fitting that is fixed to the main body door and connects the main shaft of the hinge. An adjustment base for connecting the tip end connecting portion of the main shaft so as not to rotate, a support portion for connecting the adjustment base so as to be able to rotate in a horizontal plane, and a lock bolt for fixing the adjustment base in a predetermined position. Therefore, the rotation position of the adjustment base can be adjusted with a lock bolt, and the main shaft of the hinge can be ideally connected to the support portion of the bearing fitting. In other words, this fire door can be easily fine-adjusted with the lock bolt for the relative position of the main shaft of the hinge and the support portion of the bearing bracket, and the closed position of the door can be adjusted to the optimum position.

  Furthermore, the fire door of claim 11 of the present invention is provided with an adjustment surface parallel to the tangential direction with respect to the rotation direction of the adjustment table on the outer peripheral surface of the adjustment table, and presses the adjustment surface with a lock bolt, Since the adjustment base is fixed while rotating with respect to the support portion, the adjustment base can be securely fixed with the lock bolt while easily adjusting the fixing position of the adjustment base. In particular, the fire door according to claim 12 of the present invention is such that the outer periphery of the adjustment base is cut into the opposite surface of the circle in a direction parallel to the tangential direction, and the adjustment surfaces are provided. Since the lock bolt is provided at the pressing position, both ends of the adjustment surface can be pressed with the lock bolt, and the adjustment table can be securely fixed.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment shown below exemplifies a fire door for embodying the technical idea of the present invention, and the present invention does not specify the fire door as follows.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The fire door shown in FIGS. 1 and 2 is provided with a hollow door 2 that can pass through the main body door 1 via a hinge 3. In the main body door 1 shown in the figure, a hollow door 2 is disposed in an opening 1A provided below the center. The main body door 1 is provided with an opening 1A having an opening at the lower edge, and the interior of the opening 1A is provided with a hollow door 2 in a state where the left and right sides of the hollow door 2 are opposed to the upper three sides. is doing. The fire door of this structure has a feature that the lower end of the opening 1A can be made barrier-free and can be safely evacuated in a state where the underdoor 2 is opened and the main body door 1 is opened. As shown in FIGS. 1 and 2, the fire door is provided on the both sides of the door 2 to the main body door 1 via the first hinge 3 </ b> A and the second hinge 3 </ b> B provided above and below the door 2. It is connected so that it can be opened and closed.

  The main body door 1 is attached to the passage 9 of the building via the spring hinge 4 in the same manner as a conventional fire door. The spring hinge 4 moves the fire door from a position where the passage 9 is opened to a position where the passage 9 is closed by a spring. The building is provided with a stopper (not shown) for stopping the main body door 1 at a position where the passage 9 is opened in a normal state. The stopper releases the stop state of the main body door 1 when a fire is detected. When the stopper is released, the main body door 1 is moved to a position where the spring 9 closes the passage 9. That is, the main body door 1 closes the building passage 9 in the event of a fire to prevent the fire from spreading.

  In order to prevent the main body door 1 from closing the passage 9 of the building and spreading the fire, it is necessary to set the hollow door 2 provided on the main body door 1 to the closed position. It is because a fire etc. spread from the opening part 1A of the opened door 2 if the door 2 is not in a closed position. The fire door that needs to be manually closed in the opened door 2 cannot function as the fire door unless the door 2 is closed in an emergency. Therefore, the underdoor 2 is connected to the main body door 1 by the hinge 3 that automatically moves to the closed position without being manually operated and closed.

  1 is connected to the main body door 1 via a hinge 3 fixed up and down, that is, a first hinge 3A and a second hinge 3B. In FIG. 2, the upper hinge of the door 2 is defined as a first hinge 3A, and the lower hinge is defined as a second hinge 3B.

  A specific example of the hinge 3 is shown in FIG. The hinge 3 includes a bearing fitting 10 that is fixed to the main body door 1, a main shaft 11 that is connected to the bearing fitting 10, and a rotational torque portion 12 that is fixed to the hollow door 2. The bearing fitting 10 is provided with a non-rotating hole 10a into which the main shaft 11 is inserted so as not to rotate. The bearing bracket 10 shown in the figure has an L shape as a whole, and fixes a fixed portion 10B arranged vertically to the main body door 1 and inserts a main shaft 11 into a support portion 10A arranged horizontally. A non-rotating hole 10a is provided to support the hollow door 2 at a predetermined position. As shown in FIG. 1, the bearing fitting 10 disposed on the upper side of the hollow door 2 is fixed inside the opening 1 </ b> A of the main body door 1, and is a support 10 </ b> A disposed on the upper edge of the opening 1 </ b> A. Thus, the main shaft 11 of the first hinge 3A is supported. Moreover, as shown in FIGS. 1 and 3, the bearing fitting 10 disposed on the lower side of the door 2 projects the support portion 10 </ b> A from the opening edge of the opening portion 1 </ b> A of the main body door 1 in the horizontal direction. The main shaft 11 of the second hinge 3B is supported by the support portion 10A which is the protruding portion. The upper and lower bearing fittings 10 are disposed at predetermined positions of the opening 1 </ b> A with the fixing portion 10 </ b> B fixed to the main body door 1. As shown in FIG. 3, the fixing portion 10 </ b> B of the bearing fitting 10 is provided with a plurality of screw holes 10 b through which the set screws 28 to be fixed to the main body door 1 are inserted. The bearing fitting 10 is fixed to the main body door 1 with a set screw 28 so that the non-rotating hole 10 a is arranged at the rotation center of the underdoor 2. Since the bearing fitting 10 is fixed to the upper and lower sides of the hollow door 2, the upper and lower bearing fittings 10 have their non-rotating holes 10 a arranged on the rotation center axis n of the hollow door 2.

  The main shaft 11 is disposed inside the hollow door 2 and on the rotation center axis n of the hollow door 2, and includes a tip connecting portion 11 </ b> A protruding from the hollow door 2 at one end. The main shaft 11 is connected to the bearing fitting 10 by inserting the tip connecting portion 11 </ b> A into the non-rotating hole 10 a of the bearing fitting 10. In the illustrated hinge 3, in order to connect the bearing bracket 10 and the main shaft 11 so as not to rotate with each other, the non-rotating hole 10a of the bearing bracket 10 is a square hole, and the tip connecting portion 11A of the main shaft 11 is connected to the square hole. It is a square rod to be fitted. However, the non-rotating hole of the bearing bracket and the tip connecting portion of the main shaft can be formed in other shapes and structures that fit together without rotating.

  The rotational torque unit 12 is connected to the main shaft 11 to elastically drive the underdoor 2 from the open position to the closed position, a cylindrical body 14 containing the rotational elastic body 13, and the cylindrical body 14. The fixed piece 15 fixed to the hollow door 2 and the torque adjusting mechanism 16 for adjusting the rotational torque with which the rotary elastic body 13 relatively rotates the main shaft 11 are provided.

  The rotary elastic body 13 is disposed in a state of being biased so as to rotate the hollow door 2 in the closing direction. The rotary elastic body 13 in FIG. 3 is a coil spring obtained by processing an elastic metal wire into a spiral shape. The rotating elastic body 13 has one end connected to the main shaft 11 and the other end connected to the cylindrical body 14 via a torque adjustment mechanism 16. The main shaft 11 is built in the cylinder 14 so as to be rotatable, and is connected to the main body door 1 so as not to rotate. The rotary elastic body 13 that is a coil spring tends to relatively rotate the cylindrical body 14 and the main shaft 11 by its elastic force. However, since the main shaft 11 is connected to the main body door 1 so as not to rotate, the rotary elastic body 13 rotates the cylindrical body 14 by its reaction without rotating the main shaft 11. That is, the rotating elastic body 13 elastically rotates the cylindrical body 14 with respect to the main shaft 11, and the rotating cylindrical body 14 rotates in the direction in which the fixed hollow door 2 is closed.

  As shown in FIG. 2, the fire door of the present invention opens and closes the doors 2 on both sides of the main body door 1. In this figure, the hollow door 2 is rotated left and right within a horizontal plane and opened and closed on both surfaces of the main body door 1. The rotating elastic body 13 of the hinge 3 rotates the hollow door 2 only to the right or left, that is, only to one side. The rotary elastic body 13 of the first hinge 3 </ b> A and the rotary elastic body 13 of the second hinge 3 </ b> B fixed to the upper and lower sides of the hollow door 2 in order to set the closed door 2 opened on both surfaces to the closed door 2. The closed door 2 that is rotated in opposite directions and opened in both directions is defined as a closed position. For example, the hollow door 2 is elastically rotated counterclockwise by the rotational elastic body 13 of the hinge 3 fixed to the lower part of the hollow door 2, and the hollow door 2 is moved by the rotational elastic body 13 of the second hinge 3B fixed to the upper part. The door 2 is elastically rotated to the right and rotated to the left and right to open the open door 2 on both sides to the closed position.

  The rotational torque that causes the rotating elastic body 13 to rotate the cylindrical body 14 is the rotational torque that rotates the hollow door 2 in the closing direction. The torque adjustment mechanism 16 changes the rotational position at which one end of the rotary elastic body 13 is connected to the cylindrical body 14 to rotate the cylindrical body 14 elastically, that is, the rotation that rotates the hollow door 2 in the closing direction. Adjust the torque. The hinge 3 in FIG. 3 uses the torque adjustment mechanism 16 as a one-way clutch 20. However, the present invention does not specify the hinge torque adjustment mechanism as a one-way clutch, and may be any mechanism that can adjust the rotational torque of the rotating elastic body, for example, a ratchet mechanism.

  On the other hand, the torque adjustment mechanism 16 including the clutch 20 includes an outer ring 21 fixed to the cylinder body 14 so as not to rotate, an inner ring 22 connecting one end of the rotating elastic body 13, and the inner ring 22 and the outer ring And a ball 23 between the two. As shown in FIG. 4, the inner ring 22 is provided with a tapered groove 24 for guiding the ball 23. The tapered groove 24 has a tapered shape that becomes gradually shallower in the rotation direction of the inner ring 22. The one-way clutch 20 can rotate in the direction indicated by the arrow A in FIG. 4 but does not rotate in the direction indicated by the arrow B. The torque adjusting mechanism 16 rotates the inner ring 22 of the one-way clutch 20 in the direction indicated by the arrow A to increase the torque that causes the rotating elastic body 13 to rotate in the direction of closing the door 2. In other words, when the inner ring 22 is rotated in this direction, one end of the rotary elastic body 13 made of a coil spring is moved in the winding direction, and the rotational torque that causes the coil spring to rotate the cylindrical body 14 is increased. In order to rotate the inner ring 22, as shown in the partially enlarged view of FIG. 1, an opening 17 is provided on the surface of the hollow door 2 and the cylindrical body 14, and on the outer surface of the inner ring 22, A connecting hole 25 for inserting the rotating jig 26 is provided. The rotary jig 26 is inserted into the connection hole 25 of the inner ring 22 from the opening 17 of the bore door 2 and the cylindrical body 14, and the inner ring 22 is rotated by the rotary jig 26, so that the rotary elastic body 13 rotates the cylindrical body 14. Adjust the rotational torque.

  The hinge 3 is connected to the hollow door 2 without rotating the main shaft 11 elastically. The hinge 3 fixed on the upper and lower sides of the door 2 adjusts the rotational torque with which the rotational elastic body 13 elastically rotates the main shaft 11 by the torque adjusting mechanism 16 after connecting the main shaft 11 to the bearing fitting 10 of the main body door 1. To do. The rotational elastic body 13 of the first hinge 3A is rotated to the right by turning the hollow door 2 to the closed position as shown by an arrow C in FIG. As shown by, the underdoor 2 is turned leftward to the closed position. The rotational elastic body 13 of the first hinge 3 </ b> A and the rotational elastic body 13 of the second hinge 3 </ b> B are adjusted so as to balance each other and to be in the closed position of the main body door 1. The first hinge 3A and the second hinge 3B balance the rotating elastic body 13 so that the closed door 2 is in the closed position. Therefore, when the closed door 2 is pushed and opened, the first hinge 3A and the second hinge 3B return to the closed position. Thus, the main shaft 11 is elastically rotated.

  The fixing piece 15 is provided with a through hole 15 </ b> A through which the tip connecting portion 11 </ b> A of the main shaft 11 is protruded and a plurality of screw holes 15 </ b> B for inserting the set screw 29 and fixing it to the round door 2. The through hole 15A of the fixed piece 15 penetrates the tip connecting portion 11A of the main shaft 11 so as to be rotatable. Precisely, since the main shaft 11 is connected to the main body door 1 so as not to rotate, the fixed piece 15 penetrates the tip connecting portion 11 </ b> A so as to be rotatable with respect to the main shaft 11. The fixed piece 15 is fixed to the door 2 with a set screw 29 inserted through the screw hole 15B. The first hinge 3A fixes the fixed piece 15 to the upper surface of the hollow door 2, and the second hinge 3B fixes the fixed piece 15 to the lower surface of the hollow door 2, in FIG. It is fixed to the horizontal frame 2D. The chest door 2 is provided with a storage portion 18 in which the cylindrical body 14 is built in a state in which the fixing piece 15 is fixed.

  Further, as shown in the cross-sectional views of FIGS. 5 and 6, the fire door is provided with a stopper mechanism 30 between the underdoor 2 and the main body door 1. The stopper mechanism 30 stops the hollow door 2 at the closed position in a state where the hollow door 2 is not pressed. The hollow door 2 is accurately stopped at the closed position by the stopper mechanism 30. The fire doors shown in these figures include a first vertical frame 2A of the hollow door 2 connected to the main body door 1 by a hinge 3, a second vertical frame 2B located on the opposite side, and an upper end of the hollow door 2. A stopper mechanism 30 is provided on the first horizontal frame 2C. That is, the door 2 is provided with the stopper mechanism 30 on three sides excluding the lower end. This fire door can stop the door 2 in the closed position more reliably by the stopper mechanism 30.

The stopper mechanism 30 shown in FIGS. 5 and 6 includes a recess 31 provided on the facing surface of the underdoor 2 and the main body door 1, a protrusion 32 that is inserted into and retracted from the recess 31, and the protrusion 32 elastically. And a pressing elastic body 33 that pushes out toward the recess 31. FIG. 5 shows a horizontal sectional view of the main body door 1 and the hollow door 2, and FIG. 6 shows a vertical sectional view of the main body door 1 and the hollow door 2.
The stopper mechanism 30 in these drawings is provided with a recess 31 on the outside of the hollow door 2 and a protrusion 32 on a frame 35 of the main body door 1. However, contrary to the figure, the stopper mechanism can be provided with a protrusion on the outside of the door and a recess on the main body door.

  The protruding portion 32 is disposed inside the frame body 35 of the main body door 1, is pressed by the pressing elastic body 33 from the inside, and is elastically pushed toward the concave portion 31 of the hollow door 2. The frame body 35 of the main body door 1 is provided with an opening 36 for projecting the projecting portion 32 outward from the main body door 1 in order to guide the projecting portion 32 to the recess 31 of the hollow door 2. The pressing elastic body 33 shown in FIGS. 5 and 6 elastically presses the protruding portion 32 from the inner surface via the rod 34. The rod 34 is inserted into the guide holes 37 </ b> A and 38 </ b> A of the vertical bar 37 or the horizontal bar 38 fixed to the main body door 1, and is moved in the axial direction by the pressing elastic body 33. Further, the rod 34 is provided with a flange 39 at the tip thereof. Although this collar part is not shown in figure, it can also incorporate a magnet. The collar portion containing the magnet is attracted to the vertical frame and horizontal frame of the door by the magnetic force, and the convex portion can be reliably pushed out and guided to the concave portion. Moreover, the convex part arrange | positioned at the upper side of a hollow door can also project a convex part downward with the dead weight of a collar part, and can also guide it to a recessed part reliably. The pressing elastic body 33 is a pressing spring composed of a coil spring. The pressing elastic body 33 is inserted into the rod 34, is between the flange 39 and the vertical bar 37 of the main body door 1, and elastically presses the rod 34 against the inner surface of the protruding portion 32.

  Further, the stopper mechanism 30 has the protruding portion 32 as a vertically long protruding line 32A and the recessed portion 31 as a guide groove 31A for guiding the protruding line 32A. As described above, the stopper mechanism 30 having the protrusion 32 as the vertically long protrusion 32A and the guide groove 31A for guiding the protrusion 32A as the recess 31 is in a state in which the underdoor 2 is in the closed position. There is a feature that it is possible to effectively prevent the passage of smoke and gas from this portion by closing the gap between the opening 1A and the hollow door 2 over a wide range without any gap.

  In the stopper mechanism 30 shown in FIGS. 5 and 6, when the upper and lower hinges 3 are balanced and the underdoor 2 is arranged at the closed position, the protrusion 32 that the pressing elastic body 33 elastically pushes is guided to the recess 31. The hollow door 2 is stopped at the closed position of the main body door 1. In an emergency, when the door 2 is pushed and opened, the protrusion 32 is moved to the outside of the recess 31. When the door 2 is not pushed, the hinge 3 returns the door 2 to the closed position. At this time, the projecting portion 32 is returned to the recessed portion 31 and stops the door 2 in the closed position.

  When the chest door 2 moves to the closed position, the protrusion 32 elastically compresses the pressing elastic body 33. The pressing elastic body 33 is compressed by the force by which the hinge 3 moves the door 2 to the closed position. Since the upper and lower hinges 3 are balanced and stop the closed door 2 in the closed position, the rotational torque that moves the closed door 2 to the closed position decreases as the closed door 2 approaches the closed position. A small rotational torque also weakens the force that compresses the pressing elastic body 33.

  5 and 7 show a stopper mechanism 30 that smoothly guides the protrusion 32 to the recess 31 with a weak rotational torque. The stopper mechanism 30 has the width of the guide groove 31A wider than the width of the ridge 32A, and the ridge 32A is inclined in the width direction of the guide groove 31A up and down. Furthermore, the width of the guide groove 31A is set to a width that can guide the entire inclined ridge 32A. The stopper mechanism 30 stops the hollow door 2 at the closed position while partially guiding the ridge 32A to the guide groove 31A. Like the stopper mechanism 30 in FIG. 6, the entire protrusion 32 is not guided to the recess 31 at the same time. Since the ridge 32A is partially guided by the guide groove 31A, the rotational torque of the hollow door 2 required to guide the ridge 32A to the guide groove 31A is reduced. For this reason, even if rotational torque becomes weak, the ridge 32A can be guided to the guide groove 31A, and the underdoor 2 can be moved to the closed position of the main body door 1.

  As shown in the enlarged sectional view of FIG. 8, the stopper mechanism 30 can be a magnet 40 disposed on the facing surface of the underdoor 2 and the main body door 1. The stopper mechanism 30 stops the hollow door 2 at the closed position of the main body door 1 by the attractive force of the magnet 40. In particular, the stopper mechanism 30 shown in the sectional view of FIG. 8 is housed in a magnetic cup 41 in which a magnetic metal such as iron is processed into a cup shape. The magnetic cup 41 has an inner shape larger than the outer shape of the magnet 40, and is fixed to the hollow door 2 and the main body door 1 so as to be arranged to face each other with the hollow door 2 in a closed position. . The stopper mechanism 30 can stably stop the closed door 2 in the closed position by increasing the attractive force of the magnet 40 in a state where the closed door 2 is in the closed position. This is because the magnetic cup 41 reduces the magnetic resistance and increases the magnetic attractive force in the state where the door 2 is in the closed position.

  Further, the fire door shown in FIG. 9 is provided with a hollow door 2 that can pass through the hinge door 3 so as to open in both directions to the opening 1 </ b> A of the main body door 1 via the hinge 3, and between the lower door 2 and the main body door 1. A stopper mechanism 30 for stopping the door 2 at the closed position is provided. In this fire door, the upper and lower sides of the door 2 are connected to the opening 1A of the main body door 1 via the hinge 3, but the hinge 3 is fixed to the upper and lower sides of the door 2 as in the previous embodiment. This is not to balance the elastic body and move the sliding door 2 to the closed position. The fire door stops the door 12 at the closed position via a stopper mechanism 30 provided between the door 2 and the main body door 1. Therefore, each of the upper and lower hinges 3 does not necessarily need to contain an elastic body that urges the hinged door to rotate in the opposite direction.

  The upper and lower hinges 3 shown in the figure include a main shaft 11 that connects the underdoor 2 to the main body door 1, and bearing fittings 10 and 50 that are fixed to the main body door 1 and connect the main shaft 11 of the hinge 3. Here, the second hinge 3 </ b> B provided at the lower part of the hollow door 2 includes the rotational torque part 12 that moves the hollow door 2 to the closed position, but the first hinge 3 </ b> A provided at the upper part of the hollow door 2. Is not provided with a rotational torque part for rotating the door 2. In other words, the fire door shown in the figure has a structure in which the turning door 2 is moved to the closed position by the rotational torque portion 12 of the second hinge 3B provided at the lower portion when the turning door 2 is rotated with respect to the main body door 1. Yes. However, the rotational torque part can also be provided in the first hinge provided in the upper part. That is, the door can be moved to the closed position by the rotational torque portion provided on either one of the upper and lower hinges, or can be moved to the closed position by providing rotational torque portions on both the upper and lower hinges. .

  This fire door moves the door 2 in the open position to the closed position via the rotational torque part 12 built in the hinge 3. Hereinafter, the hinge 3 including the rotational torque unit 12 will be described in detail. In the fire door shown in FIG. 9, the second hinge 3 </ b> B disposed in the lower part of the underdoor 2 includes a rotational torque portion 12. Therefore, details of the second hinge 3B will be described with reference to FIG. The details of the hinge not provided with the rotational torque portion, that is, the first hinge 3 </ b> A disposed in the upper part of the underdoor 2 in FIG. 9 will be described later.

  The hinge 3 shown in FIG. 10 includes a main shaft 11 that connects the underdoor 2 to the main body door 1, a bearing bracket 50 that is fixed to the main body door 1 and connects the main shaft 11 of the hinge 3, and a rotation that is fixed to the underdoor 2. A torque unit 12. The main shaft 11 is disposed inside the hollow door 2 and on the rotation center axis n of the hollow door 2, and includes a tip connecting portion 11 </ b> A protruding from the hollow door 2 at one end. The main shaft 11 connects the tip connecting portion 11 </ b> A to the bearing fitting 50.

  The bearing fitting 50 has an L shape as a whole, and fixes the fixed portion 50 </ b> B arranged vertically to the main body door 1, and supports the horizontally arranged support portion 50 </ b> A as an opening of the main body door 1. It arrange | positions in the state protruded in the horizontal direction from the opening edge of 1A. As shown in the drawing, the fixing portion 50B of the bearing fitting 50 is provided with a plurality of screw holes 50b through which the set screws 28 fixed to the main body door 1 are inserted.

  The rotational torque unit 12 is connected to the main shaft 11 and elastically drives the underdoor 2 from the open position to the closed position, a cylindrical body 14 containing the rotational elastic body 13, and the cylindrical body 14. And a fixed piece 15 fixed to the underdoor 2. The illustrated rotary elastic body 13 is a coil spring in which an elastic metal wire is processed into a spiral shape. The rotating elastic body 13 has one end connected to the main shaft 11 and the other end connected to the cylindrical body 14. The main shaft 11 is built in the cylindrical body 14 so as to be rotatable, and is connected to the main body door 1 so as not to rotate. The rotary elastic body 13 that is a coil spring tends to relatively rotate the cylindrical body 14 and the main shaft 11 by its elastic force. However, since the main shaft 11 is connected to the main body door 1 so as not to rotate, the rotary elastic body 13 rotates the cylindrical body 14 by its reaction without rotating the main shaft 11. That is, the rotational elastic body 13 elastically rotates the cylindrical body 14 with respect to the main shaft 11 and rotates the hollow door 2 to which the cylindrical body 14 is fixed in the closing direction. The rotating elastic body 13 that is a coil spring rotates the closing door 2 in the closing direction by the elastic force of the rotating elastic body 13 even if the closing door 2 is rotated in either the left or right direction from the closed position. Therefore, the rotary elastic body 13 is arranged so that the closed door 2 is in the closed position in a state where no force is applied in the direction in which the closed door 2 is rotated. The fixed piece 15 is fixed to the hollow door 2 by inserting a set screw 29 into the screw hole 15B and projecting the through hole 15A so that the tip connecting portion 11A of the main shaft 11 does not rotate. In the illustrated hinge 3, the fixing piece 15 is fixed to the lower surface of the hollow door 2, and in FIG. 10, to the second horizontal frame 2 </ b> D located at the lower end of the hollow door 2. The chest door 2 is provided with a storage portion 18 in which the cylindrical body 14 is built in a state in which the fixing piece 15 is fixed.

  The hinge 3 including the rotational torque portion 12 having the above structure moves the hollow door 2 rotated in both directions of the main body door 1 to the closed position by the elastic force of the rotary elastic body 13. Further, the hinge 3 shown in the figure has a closed position where the rotating elastic body 13 is stationary when the elastic force of the rotating elastic body 13 changes over time, in other words, when the load is not applied. The connection position of the bearing fitting 50 and the main shaft 11 can be adjusted so as not to deviate from the above. The bearing bracket 50 shown in the figure has an adjustment base 51 having a non-rotating hole 51a for connecting the tip connecting portion 11A of the main shaft 11 so as not to rotate, and a support for connecting the adjustment base 51 so as to be rotatable in a horizontal plane. Part 50A, and a lock bolt 52 that rotates adjustment base 51 to a predetermined position and fixes it to support part 50A.

  As shown in FIGS. 11 to 13, the adjustment base 51 has a circular shape as a whole, and is arranged on the support portion 50 </ b> A so as to be rotatable in a horizontal plane. 50 A of support parts are provided in the upper surface with the recessed part 54 which can be inserted so that the adjustment stand 51 can be rotated. Since the adjustment base 51 in the figure is circular, the support portion 50A is provided with a circular recess 54. The adjustment base 51 is provided with a non-rotating hole 51a at the center thereof for connecting the tip connecting portion 11A of the main shaft 11 so as not to rotate. The bearing fitting 50 is fixed to the main body door 1 so that the non-rotating hole 51a of the adjusting base 51 provided in the support portion 50A is arranged at the rotation center of the underdoor 2. In the illustrated hinge 3, in order to connect the bearing bracket 50 and the main shaft 11 so as not to rotate with each other, the non-rotating hole 51a of the adjustment base 51 is formed as a square hole, and the tip connecting portion 11A of the main shaft 11 is formed in this square hole. It is a square rod to be fitted. However, the non-rotating hole of the adjustment base and the tip connecting portion of the main shaft can be formed in other shapes and structures that fit in a state where they do not rotate with each other.

  The adjustment stand 51 that is disposed in the concave portion 54 of the support portion 50A and rotates in the horizontal plane is rotated to a predetermined position and is fixed by the lock bolt 52. Here, the predetermined position of the adjustment stand 51 is a position where the turn door 2 is in the closed position in a state where no force is applied in the direction in which the turn door 2 is opened. In other words, the rotation position of the adjustment platform 51 is adjusted so that the door 2 in a state where no force acts is in the closed position. Furthermore, the circular adjustment table 51 is provided with an adjustment surface 53 parallel to the tangential direction with respect to the rotation direction of the adjustment table 51 on the outer peripheral surface in order to be fixed at a predetermined position by the lock bolt 52. The adjustment table 51 of FIGS. 11 to 13 is provided with an adjustment surface 53 by cutting away the opposite surface of the circle in the direction parallel to the tangential direction on the outer periphery thereof. The adjustment table 51 presses the adjustment surface 53 with the tip of the lock bolt 52 to adjust the fixing position with respect to the support portion 50A.

  As shown in FIGS. 11 and 12, the bearing fitting 50 in the figure is provided with a screw hole 55 through which the lock bolt 52 is inserted from both sides of the support portion 50 </ b> A toward the recess 54. In the illustrated support portion 50A, two screw holes 55 are opened in the horizontal direction on the side surfaces facing each other. These screw holes 55 are provided at positions where both ends of the respective adjustment surfaces 53 are pressed at the tips of the lock bolts 52 inserted therein. The screw hole 55 shown in the figure is provided with an insertion recess 56 for inserting the screw head 52A of the lock bolt 52 so that the screw head 52A can be rotated on the side surface of the support portion 50A, and from the bottom surface of the insertion recess 56 54 is opened through inside. The lock bolt 52 rotates the screw head 52 </ b> A inserted into the insertion recess 56 with a tool from the outside, and the amount of protrusion into the recess 54 is adjusted. However, lock bolts with no screw heads can be used. The screw hole for inserting the lock bolt penetrates from the side surface of the support portion to the inner surface of the recess portion without providing the insertion recess portion.

  As shown in FIG. 13, the bearing fitting 50 having the above structure adjusts the protruding amount of each lock bolt 52 and finely adjusts the position of the adjustment base 51. When the adjustment platform 51 is rotated in the direction indicated by the arrow A in FIG. 12, as shown in FIG. 13, the protrusions of the lock bolts 52 located at the upper right and lower left are increased, and the locks located at the lower right and upper left are The protrusion amount of the bolt 52 is reduced. Further, when the adjustment base 51 is rotated in the direction opposite to the arrow A in FIG. 12, contrary to FIG. The protruding amount of the lock bolt 52 to be increased is increased. As described above, the rotation position of the adjustment stand 51 is adjusted so that the underdoor 2 can be arranged at the closed position.

  Next, the hinge 3 that does not include the rotational torque portion will be described in detail. In FIG. 9, the first hinge 3 </ b> A disposed on the upper part of the hollow door 2 is hinged by being fixed to the main body door 1 and the main body door 1, as shown in FIG. 14, and the main door 1. 3 is provided with a bearing bracket 10 for connecting the three main shafts 11 and an expansion / contraction part 60 for connecting the main shaft 11 to and from the underdoor 2 so as to be freely inserted and removed. The main shaft 11 is disposed on the rotation center axis n of the hollow door 2, and is provided with a tip connecting portion 11 </ b> A protruding from the hollow door 2 at one end. The main shaft 11 is connected by inserting the tip connecting portion 11 </ b> A into a rotation hole 10 c opened in the bearing fitting 10. Furthermore, the first hinge 3 </ b> A shown in the figure has a structure in which the tip connecting portion 11 </ b> A of the main shaft 11 can be inserted into and removed from the hollow door 2 via the telescopic portion 60 in order to attach the hollow door 2 to the main body door 1.

  14 includes an elastic body 61 that elastically presses the main shaft 11 in a direction in which the distal end connecting portion 11A protrudes from the hollow door 2, a cylindrical body 62 that incorporates the elastic body 61, and the cylindrical body. And a fixed piece 63 fixed to the hollow door 2. The main shaft 11 is formed such that the rear end portion 11B built in the cylindrical body 62 is thicker than the front end connecting portion 11A so that the main shaft 11 can reciprocate along the inner surface of the cylindrical body 62. The main shaft 11 shown in the figure has the outer diameter of the rear end portion 11B substantially equal to the inner diameter of the cylindrical body 62 so that the main shaft 11 can reciprocate on the rotation center axis n. The elastic body 61 is a coil spring obtained by processing an elastic metal wire into a spiral shape. The elastic body 61 that is a coil spring presses the rear end portion 11 </ b> B of the main shaft 11 in the cylindrical body 62, and elastically pushes the front end connecting portion 11 </ b> A of the main shaft 11 from the door 2. The fixed piece 63 is fixed to the upper surface of the hollow door 2, and the tip connecting portion 11A of the main shaft 11 is projected through the through hole 63A. The chest door 2 is provided with a storage portion 18 in which the cylindrical body 62 is built in a state in which the fixing piece 63 is fixed.

  The hinge 3 provided with the expansion / contraction part 60 having the above structure is disposed at a position facing the bearing fitting 10 provided on the main body door 1 in a state where the distal end connecting part 11A of the main shaft 11 is pushed into the inside. In other words, the cutout door 2 is connected to the tip end of the main shaft 11 of the first hinge 3A provided at the upper end in a state where the end connection portion 11A of the main shaft 11 of the second hinge 3B provided at the lower end is connected to the bearing fitting 50. 11A is pushed into the interior of the hollow door 2, and in this state, the hollow door 2 is arranged at the connection position of the main body door 1, and then the tip coupling portion 11A is projected from the hollow door 2 to rotate the rotation hole of the upper bearing fitting 10. Insert into 10c and connect. The hinge 3 connects the front end connecting portion 11A of the main shaft 11 so as to be rotatable with respect to the rotation hole 10c of the bearing fitting 10 so that the hollow door 2 can be rotated with respect to the main body door 1. However, a hinge can also be made into the structure which connects the front-end | tip connection part of a main axis | shaft to the non-rotation hole provided in the bearing bracket, and can rotate a main axis | shaft with respect to a cylinder.

  Further, the fire door shown in FIGS. 9, 10, and 14 is provided with a stopper mechanism 30 between the underdoor 2 and the main body door 1, and with this stopper mechanism 30, the underdoor 2 is attached to the main body door 1. Stopped in the closed position. As shown in FIGS. 15 to 18, the stopper mechanism 30 includes a concave portion 31 provided on the facing surface of the underdoor 2 and the main body door 1, a protruding portion 32 that is put in and out of the concave portion 31, and the protruding portion 32. And a pressing elastic body 33 that elastically pushes out toward the concave portion 31. As shown in FIGS. 17 and 18, the protrusion 32 is a vertically long protrusion 32 </ b> A, and the recess 31 is a guide groove 31 </ b> A for guiding the protrusion 32 </ b> A. As described above, the stopper mechanism 30 having the protrusion 32 as the vertically long protrusion 32A and the guide groove 31A for guiding the protrusion 32A as the recess 31 is in a state in which the underdoor 2 is in the closed position. There is a feature that it is possible to effectively prevent the passage of smoke and gas from this portion by closing the gap between the opening 1A and the hollow door 2 over a wide range without any gap. In the illustrated stopper mechanism 30, a recess 31 is provided on the outside of the hollow door 2, and a ridge 32 </ b> A that is a protrusion 32 is provided on a frame 35 that is a facing surface of the main body door 1. However, the stopper mechanism can be provided with a protrusion on the outside of the hollow door and a recess on the main body door, contrary to the drawing.

  The width of the guide groove 31A is wider than the width of the ridge 32A, and both ends of the ridge 32A are inclined in the width direction of the guide groove 31A. Furthermore, the guide groove 31A has a width that can guide the entire inclined ridge 32A. The stopper mechanism having this structure can smoothly guide the protrusion 32 to the recess 31 with a weak rotational torque. This is because the protrusion 32A partially guides the guide groove 31A without simultaneously guiding the entire protrusion to the recess. The stopper mechanism 30 guides the protruding portion 32 elastically pushed out by the pressing elastic body 33 to the recessed portion 31, and stops the hollow door 2 at the closed position of the main body door 1.

  Further, in the fire door shown in the figure, the hollow door 2 has concave portions 31 on both side surfaces and the upper side surface, and the main body door 1 is inside the opening portion 1A and is provided with the concave portion 31 provided in the hollow door 2. Convex strips 32A are provided on the inner surface on both sides and the lower surface on the upper side. This fireproof door has a stopper mechanism 30 on the first vertical frame 2A of the hollow door 2, the second vertical frame 2B located on the opposite side, and the first horizontal frame 2C located on the upper end of the hollow door 2. Provided. That is, the door 2 is provided with the stopper mechanism 30 on three sides excluding the lower end. This fire door can stop the door 2 in the closed position more reliably by the stopper mechanism 30.

  As shown in FIG. 15, the stopper mechanisms 30 provided on both side surfaces of the underdoor 2 and the inner surfaces on both sides of the opening 1 </ b> A of the main body door 1, which is the opposite surface, have the same structure as the stopper mechanism 30 shown in FIG. 5. It is said. Furthermore, as shown in FIGS. 16 and 17, the stopper mechanism 30 provided on the upper end surface of the door 2 and the lower surface of the upper side of the opening 1 </ b> A of the main body door 1, which is the opposite surface, Inclined toward the longitudinal direction. As shown by the chain line in FIG. 18, this stopper mechanism 30 is provided with convex strips 32 </ b> A provided on the lower surface above the opening 1 </ b> A of the main body door 1 on both inner surfaces of the opening 1 </ b> A at both ends thereof. It arrange | positions in the position connected with the upper end of 32A. Further, the stopper mechanism 30 shown in FIG. 18 connects the boundary portions of the guide grooves 31 </ b> A, which are the concave portions 31 provided on the three sides of the side doors 2 and the upper end surface, to each other at the corner portion at the upper end of the lower door 2. Yes. As described above, the boundary portions of the guide grooves 31A, which are the concave portions 31 provided on the three sides of the hollow door 2, are connected to each other, and the protrusions 32 are the protruding portions 32 provided on the three sides of the inner surface of the opening 1A of the main body door 1. The stopper mechanism 30 disposed at a position where the boundary portions of the strips 32A are coupled to each other connects the boundary portions of the stopper mechanisms 30 disposed on the three sides of the hollow door 2 in a continuous state when the hollow door 2 is closed. Thus, it is possible to effectively prevent a gap from being formed in this portion. Therefore, there is a feature that the smoke shielding performance can be secured by eliminating the gap in the upper corner portion of the opening 1A in the state in which the door 2 is closed.

  Further, as shown in FIG. 14, the stopper mechanism 30 provided on the upper end surface of the hollow door 2 penetrates the distal end connecting portion 11 </ b> A of the main shaft 11 protruding from the first hinge 3 </ b> A provided on the upper portion of the hollow door 2. A hole 64 is opened. As shown in FIG. 18, the guide groove 31 </ b> A, which is a recess 31 provided on the upper end surface of the door 2, is at the center of the guide groove 31 </ b> A and passes through the tip connecting portion 11 </ b> A of the main shaft 11 protruding from the door 2. A through hole 64 is opened. Further, the ridge 32A provided on the lower surface on the upper side of the opening 1A of the main body door 1 is at a position where the tip connecting portion 11A of the main shaft 11 protruding from the upper end surface of the hollow door 2 passes as shown in FIG. In addition, a through hole 64 is opened at a position facing the rotation hole 10c of the bearing fitting 10 incorporated in the main body door 1. As described above, the through hole 64 is opened in the guide groove 31 </ b> A that is the concave portion 31 and the protrusion 32 </ b> A that is the protruding portion 32, and the tip coupling portion 11 </ b> A of the main shaft 11 is passed through the through hole 64 and connected to the bearing fitting 10. The structure that eliminates the gap of the stopper mechanism 30 disposed on the upper side of the underdoor 2 can reliably prevent smoke from leaking from this portion.

  These stopper mechanisms 30 are arranged such that the protrusion 32 is disposed inside the frame body 35 of the main body door 1 and is pressed from the inside by the pressing elastic body 33 to be elastically pushed toward the recessed portion 31 of the hollow door 2. ing. The frame body 35 of the main body door 1 is provided with an opening 36 for projecting the projecting portion 32 outward from the main body door 1 in order to guide the projecting portion 32 to the recess 31 of the hollow door 2. The pressing elastic body 33 in FIGS. 15 and 16 elastically presses the protruding portion 32 from the inner surface via the rod 34. The rod 34 is inserted into the guide holes 37 </ b> A and 38 </ b> A of the vertical bar 37 or the horizontal bar 38 fixed to the main body door 1, and is moved in the axial direction by the pressing elastic body 33. Further, the rod 34 is provided with a flange 39 at the tip thereof. Although this collar part is not shown in figure, it can also incorporate a magnet. The collar portion containing the magnet is attracted to the vertical frame and horizontal frame of the door by the magnetic force, and the convex portion can be reliably pushed out and guided to the concave portion. Moreover, the convex part arrange | positioned at the upper side of a hollow door can also project a convex part downward with the dead weight of a collar part, and can also guide it to a recessed part reliably. The pressing elastic body 33 is a pressing spring composed of a coil spring. The pressing elastic body 33 is inserted into the rod 34, is between the flange 39 and the vertical bar 37 of the main body door 1, and elastically presses the rod 34 against the inner surface of the protruding portion 32.

  The above stopper mechanism 30 stops the hollow door 2 in the closed position in a state where the hollow door 2 is not pressed. When the underdoor 2 moves to the closed position, the stopper mechanism 30 guides the protrusion 32 that the pressing elastic body 33 elastically pushes to the recess 31 and stops the underdoor 2 at the closed position of the main body door 1. In an emergency, when the door 2 is pushed and opened, the protrusion 32 is moved to the outside of the recess 31. When the door 2 is not pushed, the hinge 3 returns the door 2 to the closed position. At this time, the projecting portion 32 is returned to the recessed portion 31 and stops the door 2 in the closed position. When the chest door 2 moves to the closed position, the protrusion 32 elastically compresses the pressing elastic body 33. The pressing elastic body 33 is compressed by the force by which the hinge 3 moves the door 2 to the closed position. As hinged door 2 approaches the closed position, hinge 3 has a smaller rotational torque that moves hollowed door 2 to the closed position, and a force for compressing pressing elastic body 33 also becomes weaker. However, in the stopper mechanism described above, since the ridge 32A is partially guided by the guide groove 31A, the rotational torque of the hollow door 2 required to guide the ridge 32A to the guide groove 31A is reduced. For this reason, even if rotational torque becomes weak, the ridge 32A can be smoothly guided to the guide groove 31A, and the underdoor 2 can be moved to the closed position of the main body door 1.

It is a front view of the fire door concerning one example of the present invention. It is a horizontal sectional view of the fire door shown in FIG. It is an expanded sectional view showing an example of a hinge. It is a horizontal sectional view which shows the one-way clutch of the hinge shown in FIG. It is AA sectional view taken on the line of the fire door shown in FIG. It is a BB sectional view of the fire door shown in FIG. It is a front view which shows the protrusion part of the stopper mechanism shown in FIG. It is an expanded sectional view showing other examples of a stopper mechanism. It is a front view of the fire door concerning the other Example of this invention. It is an expanded sectional view which shows the 2nd hinge of the fire door shown in FIG. It is a disassembled perspective view of the bearing metal fitting of the hinge shown in FIG. It is a horizontal sectional view of the bearing metal fitting of the hinge shown in FIG. It is a horizontal sectional view which shows the state which adjusts the bearing metal fitting shown in FIG. It is an expanded sectional view which shows the 1st hinge of the fire door shown in FIG. 9, Comprising: It is a figure corresponded in the CC sectional view of FIG. It is the sectional view on the AA line of the fire door shown in FIG. It is the BB sectional view taken on the line of the fire door shown in FIG. It is a bottom perspective view of the opening part of the main body door of the fire door shown in FIG. FIG. 10 is a schematic perspective view of the door for the fire door shown in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Main body door 1A ... Opening part 2 ... The underdoor 2A ... 1st vertical frame
2B ... Second vertical frame
2C ... 1st horizontal frame
2D ... 2nd horizontal frame 3 ... Hinge 3A ... 1st hinge
3B ... 2nd hinge 4 ... Spring hinge 9 ... Passage 10 ... Bearing bracket 10A ... Supporting part
10B ... Fixing part
10a ... non-rotating hole
10b ... Screw hole
10c ... Rotating hole 11 ... Spindle 11A ... Tip connecting part
11B ... Rear end 12 ... Rotational torque part 13 ... Rotating elastic body 14 ... Cylinder 15 ... Fixing piece 15A ... Through hole
15B ... Screw hole 16 ... Torque adjustment mechanism 17 ... Opening 18 ... Storage part 20 ... One clutch 21 ... Outer ring 22 ... Inner ring 23 ... Ball 24 ... Taper groove 25 ... Connecting hole 26 ... Rotating jig 28 ... Set screw 29 ... Set screw 30 ... Stopper mechanism 31 ... Recess 31A ... Guide groove 32 ... Projection 32A ... Projection 33 ... Pressing elastic body 34 ... Rod 35 ... Frame 36 ... Opening 37 ... Vertical bar 37A ... Guide hole 38 ... Horizontal bar 38A ... Guide hole 39 ... Bridge 40 ... Magnet 41 ... Magnetic cup 50 ... Bearing bracket 50A ... Support part
50B ... Fixing part
50b ... Screw hole 51 ... Adjustment base 51a ... Non-rotating hole 52 ... Lock bolt 52A ... Screw head 53 ... Adjustment surface 54 ... Recess 55 ... Screw hole 56 ... Insertion recess 60 ... Expansion / contraction part 61 ... Elastic body 62 ... Cylindrical body 63 ... Fixed piece 63A ... through hole 64 ... through hole n ... rotation center axis

Claims (12)

A fire door provided with a hollow door (2) that can pass through the main body door (1) via a hinge (3),
The hollow door (2) is connected to the main body door (1) so that it can be opened and closed on both sides via a first hinge (3A) and a second hinge (3B) provided at the top and bottom.
The first hinge (3A) and the second hinge (3B) include a rotary elastic body (13) that elastically drives the hollow door (2) from the open position to the closed position, and the first hinge (3A). ) And the second hinge (3B) are driven by the built-in rotary elastic body (13) to drive the hollow door (2) in the opposite direction, and the first hinge (3A) and the second hinge (3B). A fire-proof door in which the rotary elastic body (13) is balanced and the underdoor (2) is arranged at the closed position of the main body door (1).   A stopper mechanism (30) is provided between the hollow door (2) and the main body door (1) to stop the hollow door (2) in the closed position. With this stopper mechanism (30), the hollow door (2) The fire door as claimed in claim 1, wherein the door is stopped at the closed position of the main body door (1). The stopper mechanism (30) includes a recess (31) provided on the facing surface of the hollow door (2) and the main body door (1), a protrusion (32) inserted into and removed from the recess (31), and the protrusion A pressing elastic body (33) that elastically pushes the portion (32) toward the recess (31),
The protrusion (32) is a vertically long protrusion (32A), the recess (31) is a guide groove (31A) for guiding the protrusion (32A), and the width of the guide groove (31A) is the protrusion (32A). The ridges (32A) are inclined in the width direction of the guide groove (31A) up and down, and the width of the guide groove (31A) is further guided to the entire inclined ridge (32A). The width is as possible,
The protrusion (32) elastically pushed out by the pressing elastic body (33) is guided to the recess (31), and the hollow door (2) is stopped at the closed position of the main body door (1). Fire door.   The stopper mechanism (30) consists of a magnet (40) arranged on the facing surface of the hollow door (2) and the main body door (1), and the lower door (2) is moved to the main body door by the attractive force of the magnet (40). The fire door according to claim 2, wherein the fire door stops at the closed position of (1). A fire door that is provided so that a hollow door (2) that can pass through is opened to both the opening (1A) of the main body door (1) via a hinge (3),
A stopper mechanism (30) is provided between the hollow door (2) and the main body door (1) to stop the hollow door (2) in the closed position. With this stopper mechanism (30), the hollow door (2) Is a fire door that stops at the closed position of the main body door (1),
The stopper mechanism (30) includes a recess (31) provided on the facing surface of the hollow door (2) and the main body door (1), a protrusion (32) inserted into and removed from the recess (31), and the protrusion A pressing elastic body (33) that elastically pushes the portion (32) toward the recess (31),
The protrusion (32) is a vertically long protrusion (32A), the recess (31) is a guide groove (31A) for guiding the protrusion (32A), and the width of the guide groove (31A) is the protrusion (32A). The ridges (32A) are inclined in the width direction of the guide groove (31A) up and down, and the width of the guide groove (31A) is further guided to the entire inclined ridge (32A). The width is as possible,
A fireproof door configured to guide the projecting portion (32) elastically pushed by the pressing elastic body (33) to the recessed portion (31) and stop the underdoor (2) at the closed position of the main body door (1). .   The fire door as claimed in claim 5, wherein the hollow door (2) is provided with a recess (31), and a protrusion (32A) is provided on the opposing surface of the body door (1).   The hollow door (2) has recesses (31) on both sides and the upper side, and the main body door (1) is inside the opening (1A) and is provided in the hollow door (2) (31) The fire door as claimed in claim 6, wherein protrusions (32A) are provided on the inner surface on both sides and the lower surface on the upper side, which are opposed to each other.   The fire door according to claim 7, wherein the protrusions (32A) provided on the lower surface on the upper side of the opening (1A) of the main body door (1) are arranged to be inclined in the longitudinal direction.   The ridges (32A) provided on the upper lower surface of the opening (1A) of the main body door (1) are connected to the upper ends of the ridges (32A) provided on both inner surfaces of the opening (1A) at both ends thereof. The fire door according to claim 8, wherein the fire door is disposed at a position to be fired.   The main shaft (11) that connects the door (2) to the main door (1) with the hinge (3), and the bearing bracket (50) that is fixed to the main door (1) and connects the main shaft (11) of the hinge (3) The bearing bracket (50) includes an adjustment base (51) having a non-rotating hole (51a) for connecting the tip connection portion (11A) of the main shaft (11) so as not to rotate, and the adjustment base (51 ) To be able to rotate in a horizontal plane, and a lock bolt (52) to rotate the adjustment base (51) to a predetermined position and fix it to the support (50A). Item 6. A fire door described in item 5.   An adjustment surface (53) parallel to the tangential direction with respect to the rotation direction of the adjustment table (51) is provided on the outer peripheral surface of the adjustment table (51), and the lock bolt (52) presses the adjustment surface (53). The fire prevention door according to claim 10, wherein the adjustment base (51) is fixed while rotating with respect to the support portion (50A).   The outer periphery of the adjustment table (51) has a shape in which the opposite surface of the circle is cut in a direction parallel to the tangential direction to provide the adjustment surface (53), and the positions where both ends of each adjustment surface (51) are pressed The fire door according to claim 11, wherein a lock bolt (52) is provided on the door.

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