JP2009155867A - Closing device of emergency door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a closing device of an emergency door enabling the easy adjustment of the opening angle of the door after the installation. <P>SOLUTION: A moving member is movably disposed in a casing 2. The pivot shaft 6 of a link 4 is movable relative to the pivot guide 24 of the moving member. A bolt 62 for preventing the pivot shaft 6 from being moved relative to each other is installed in the pivot shaft 6. The opening angle of the door can be adjusted by operating the bolt 62 from the outside of an upper frame 100. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement in an emergency door closing device that always opens a door at a predetermined angle and closes the door by a closing force of a door closer in an emergency such as a fire.

  As this type of closure device, the following Patent Documents 1 and 2 have already been proposed. That is, in general, an emergency door that rotates about an axis in the vertical direction is urged toward the closing side by a closing force of a door closer attached to the door, but the closing force is attached to the upper frame so as to be movable. The door is always held at a predetermined opening angle by being transmitted to the moving member via a link and being held at a predetermined position by the holding means. In an emergency such as a fire, the holding means is de-energized or the energization of the holding means is interrupted to release the holding member, and the moving member moves along the upper frame by the closing force of the door closer. The door will be closed.

  Further, in Patent Document 2 below, by interposing a spacer between the electric release hook and the main body of the locking connection portion, the door opening angle can be adjusted to be smaller than when no spacer is interposed. A structure is disclosed.

Japanese Utility Model Publication No. 60-47544 JP 2006-247118 A

  However, when the opening angle of the door is adjusted in a structure in which a spacer is interposed as described in Patent Document 2, the electric device integrated by screws is disassembled after removing the closing device installed on the upper frame. The hook for release and the main body of the locking connection part are separated by removing the screw, and after interposing a spacer between them, the two are fastened and integrated again with the screw, and then installed in the upper frame There is a need to. In addition, since the spacer is interposed, the range of the angle that can be adjusted is limited, and the reference opening angle without the spacer is adjusted in the direction of narrowing the angle. Therefore, after construction of the closing device, a structure that can easily adjust the opening angle of the door at the site is required.

  Then, this invention makes it a subject to provide the closing device of the emergency door which can adjust the opening angle of a door easily after construction.

  The present invention has been made to solve the above-mentioned problems, and an emergency door closing device according to the present invention is installed on a door closer attached to a door that rotates about an axis in the vertical direction and an upper frame. A movable member that is movable along the upper frame, a link that connects the door closer and the movable member to apply a closing force by the door closer to the movable member, and a fixed member that is installed on the upper frame. In an emergency door closing device having a holding means for holding a moving member at all times so as not to move to the closing side and releasing the holding in an emergency, the upper portion from the connection point between the link and the moving member to the holding means is provided. A part of the moving member is configured to be relatively movable along the upper frame with respect to the other part so that the separation distance along the frame can be adjusted, and a fixing member for preventing the relative movement is provided in the upper frame. Characterized in that it is exposed to the outside through the upper frame so as to be operable from outside.

  In the closing device having such a configuration, the relative movement of a part of the moving member can be prevented by operating the fixing member exposed from the upper frame from the outside of the upper frame. Therefore, if the prevention of relative movement of a part of the moving member is released by operating the fixing member after construction, the part can be moved relative to the other part, thereby connecting the link and the moving member. The opening distance of the door can be narrowed by increasing the separation distance along the upper frame from the location to the holding means, or conversely, the opening angle of the door can be widened by shortening the separation distance.

  In particular, the moving member includes a support shaft that protrudes downward from the upper frame to rotatably support the link, and the support shaft is configured to be relatively movable along the upper frame with respect to other portions of the moving member. The fixing member for preventing relative movement of the support shaft is preferably provided on the support shaft. The support shaft serves as a connection point between the link and the moving member. Since the support shaft protrudes downward from the upper frame, it is possible to easily operate the fixing member from below by providing a fixing member on the support shaft. Can do.

  The moving member includes a plate-shaped guide plate portion having a slit along the upper frame, and the support shaft is positioned below the guide plate portion and has a cylindrical body having a support surface that supports the link; A core member having a shaft portion inserted into the cylindrical body and penetrating through the slit and a flange portion that is located above the guide plate portion and protrudes laterally from the shaft portion, and has a bolt as a fixing member It is preferable that the relative movement of the support shaft is prevented by screwing into the shaft portion of the core material and sandwiching the guide plate portion vertically between the cylindrical body and the flange portion of the core material. Since the bolt is screwed into the shaft portion of the core member as the fixing member, the support shaft can be directly fixed to the guide plate portion by tightening the bolt. Also, since the support shaft can be slid relative to the guide plate only by loosening the bolt, the support shaft can be easily slid by loosening the bolt to adjust the door opening angle. Moreover, since the support shaft slides, fine adjustment of the opening angle is easy.

  As described above, since the fixing member exposed from the upper frame can be operated from the outside of the upper frame, the opening angle of the door can be easily adjusted at the site after construction.

Hereinafter, an embodiment of an emergency door closing device according to the present invention will be described with reference to FIGS.
As shown in FIG. 1 and FIG. 2, which are a plan view and a front view in the opened state, the closing device in the present embodiment is attached to the upper frame 100 via a hinge 101 and is around the vertical axis T. The emergency door 102 that rotates in a normal manner is always held at a predetermined opening angle to allow passage, and in an emergency, the door is closed as shown in FIGS. 4 and 5 to block smoke and the like. Such a closing device includes a door closer 1 that is attached to the door 102 and generates a closing force, a long casing 2 that is fixedly installed in the upper frame 100 along the longitudinal direction thereof, and the casing 2. A movable member 3 slidably installed inside as a guide rail, a link 4 for connecting the door closer 1 and the movable member 3 to apply a closing force by the door closer 1 to the movable member 3, and a fixed installation in the casing 2 In addition, a holding means 5 is provided to hold the moving member 3 at all times and to release the holding in an emergency so that the moving member 3 does not move to the closing side by the closing force of the door closer 1.

  Note that the closing device in the present embodiment is configured to electrically release the holding by the holding means 5 and is configured to be able to close the door 102 by manually applying an external force to the door 102. 4 and 5 show a plan view and a front view in a state where the door is electrically closed, and FIGS. 6 and 7 show a plan view and a front view in a state where the door is manually closed. In the figure, the arrow A is the door opening direction and the arrow B is the door closing direction, the door opening direction is the direction approaching the vertical axis T, and the door closing direction is the direction away from the axis T.

  As shown in FIG. 3, the lower front portion (opening direction side) of the upper frame 100 is raised one step through a step portion 100 b, and the upper portion of the door 102 in the closed state is placed on the lower step upper step portion 100 a. And the stepped portion 100b of the upper frame 100 makes it difficult for smoke and the like to pass through the gap between the upper frame 100 and the door 102. Further, as shown in FIGS. 5 and 7, the door closer 1 is fixed to the upper inside of the door 102 with a screw, and generates a closing force on the main shaft 10. One end of the link 4 is attached to the main shaft 10 and rotates together with the main shaft 10, and the other end of the link 4 is rotatably supported by the support shaft 6 of the moving member 3. Therefore, when the door closer 1 rotates the main shaft 10, the link 4 rotates about the main shaft 10, and the closing force by the door closer 1 is transmitted to the moving member 3 via the support shaft 6. As shown in FIGS. 5 and 7, the upper surface of the door 102 is partially recessed downward, and the door closer 1 is attached so as to face the recess 102a, and the door 102 is linked to the recess 102a in the closed state. 4 is located. 1 and FIG. 16 and FIG. 17 to be described later are trajectories of the main shaft 10 of the door closer 1 that accompanies the opening / closing operation of the door 102.

  The casing 2 is inserted into the upper frame 100 from the lower step 100a of the lower surface of the upper frame 100 that opens downward, and is attached to the casing support member 103 with screws as shown in FIG. The lower surface of the frame 100 is flush with the upper step portion 100a. More specifically, as shown in FIGS. 5 and 7, the casing 2 is disposed at a position of the upper frame 100 that vertically faces the recess 102 a on the upper surface of the door 102 in the closed state. As shown in FIG. 12, the casing 2 has a rectangular tube shape with a lower opening and is made of, for example, metal, and is formed by sheet metal bending or the like in a U-shape so as to be the lower opening. A lid 2d (see FIGS. 1, 16, and 17) is attached to one end to form a square tube with a downward opening. And the lower surface of this casing 2 is covered with the plate-shaped cover 7 also called a decorative board. As shown in FIG. 12, a flange 2 c that protrudes inward over a predetermined length in the longitudinal direction is formed at the lower end of the side surface of the casing 2 so as to support the moving member 3 from below. A slit-like long hole 7a is formed, and the support shaft 6 of the moving member 3 is moved downward from the slit-like opening 2e between the flanges 2c of the casing 2 and the slit-like long hole 7a of the cover 7. It protrudes. Note that the length of the casing 2 and the cover 7 is set slightly shorter than the length of the recess 102 a on the upper surface of the door 102.

  The moving member 3 has an electric release hook 46 extending in the door opening direction as a locking portion, and the holding means 5 holds the moving member 3 in a predetermined manner by locking the electric release hook 46 of the moving member 3. The movement member 3 is allowed to move in the door closing direction by holding the position and releasing the lock of the electric release hook 46 of the movement member 3. The holding means 5 electrically engages and releases the electric release hook 46 of the moving member 3, but has the same configuration as that of the conventional one, so that the illustration thereof is omitted and the outline thereof is described. To do. The holding means 5 includes a solenoid fixed in the casing 2, and the solenoid projects the plunger in the door closing direction by energization in an emergency or when the energization is always released. Due to the protrusion of the plunger, the toggle link, which is normally urged in a straight state, is bent, and the electric release locking arm swings in the vertical direction by the bending deformation. A locking pin 51 as a locking portion for locking the electric release hook 46 of the moving member 3 is provided at an end of the electric release locking arm in the door closing direction. When the locking pin 51 moves downward along with the swinging movement, the locking of the electric release hook 46 of the moving member 3 by the locking pin 51 is released. 2, 5, and 7 show only the locking pin 51 of the holding means 5.

  Next, the moving member 3 will be described. The moving member 3 is located on the door closing side and is provided on the door opening side of the first moving member 11 and the first moving member 11 provided with the support shaft 6. The second moving member 12 is provided with an electric release hook 46 that is locked by the holding means 5 and slides while sliding on the inner surface of the casing 2 as a guide rail. The first moving member 11 and the second moving member 12 move together as a result of the locking portions of the first moving member 11 and the second moving member 12 being locked. Only the first moving member 11 is moved by the closing force applied from the shaft 6.

  This locking structure is the same as that of the prior art, and as shown in the bottom view of FIG. 8, the first moving member 11 is provided with a manual release hook 20 toward the door opening side, The moving member 12 swings in the horizontal direction on the inner side of a U-shaped frame body 40 that opens to the door closing side (first moving member 11 side), with the support portion 41 on the door opening side serving as a fulcrum. A manually-released locking arm 42 that is movably supported is provided, and a roller 43 that locks the manual-release hook 20 is attached to the tip of the manual-released locking arm 42. The manual release locking arm 42 is urged by a spring 44 in a direction in which the roller 43 at the tip engages the manual release hook 20, and the roller 43 normally pushes the manual release hook 20 by the urging force of the spring 44. Locked. On the other hand, when the door 102 is manually closed, if the external force is transmitted to the first moving member 11 via the link 4 and the support shaft 6, the second moving member 12 is engaged by the holding means 5. Since the manual release locking arm 42 is tilted against the urging force of the spring 44 and the manual release hook 20 is released from the locked state, only the first moving member 11 is moved to the door closing side. Move towards. The urging force of the spring 44 can be adjusted by a nut 45, and the force of the manual release locking arm 42 is greater than the force by which the holding means 5 locks the electric release hook 46 of the second moving member 12. The force with which the roller 43 engages the manual release hook 20 is set to be smaller. Further, the base portion 46a of the electric release hook 46 is fixed to the end face of the second moving member 12 on the door opening side of the frame body 40 with a screw or the like. Both the frame 40 and the electric release hook 46 of the second moving member 12 are made of metal.

  Thus, the moving member 3 has a configuration in which two members are arranged side by side along the upper frame 100. Normally, the electric release hook 46 is held by the electric release locking arm in the open state. Therefore, as shown in FIGS. 1 and 2, the first moving member 11 and the second moving member 12 are integrally located on the door opening side. When the locking of the electric release hook 46 is released in an emergency, both the first moving member 11 and the second moving member 12 move to the door closing side as shown in FIGS. Further, when the door 102 is closed manually, as shown in FIGS. 6 and 7, the manual release hook 20 is released by the external force acting on the door 102, and only the first moving member 11 moves to the door closing side.

  The first moving member 11 includes a frame body 21 that slides on the inner surface of the casing 2, the support shaft 6, and the support shaft 6 so that the support shaft 6 can be moved relative to the frame body 21. A spindle guide 24 that guides along the casing 2 is provided. As shown in FIGS. 8 to 10, 12, and 13, the frame body 21 includes a pair of left and right frame members 22 and 23, and the manual release hook 20 is formed on the inner surface of one frame member 22. ing. As shown in FIG. 9, the frame members 22 and 23 are located on the door closing side and have large vertical portions 22a and 23a, and on the door opening side, the vertical portions are smaller than the main portions 22a and 23a. 22b and 23b, and is formed in an L shape as a whole. The main portions 22a and 23a slide on the inner surface of the upper portion 2a of the casing 2, the inner surface of the side portion 2b, and the inner surface of the flange portion 2c, and the arm portions 22b and 23b are end portions on the door opening side of the main portions 22a and 23a. Extends from the lower part of the casing 2 toward the door opening side, and slides on the lower region of the inner surface of the side portion 2b of the casing 2 and the inner surface of the flange portion 2c. The main portions 22 a and 23 a are located on the door opening side of the frame body 40 of the second moving member 12, and the arm portions 22 b and 23 b are located on the lower side of the frame body 40 of the second moving member 12. Both the frame members 22 and 23 are formed by molding or the like from resin in order to make the sliding property with the inner surface of the metal casing 2 good, and horizontal by screws 25 as shown in FIGS. It is fastened and integrated in the direction.

  The support shaft guide 24 is sandwiched from the left and right by the both frame members 22 and 23. The support shaft guide 24 is made of metal and extends from the arm portions 22 b and 23 b of the frame body 21 to the main portions 22 a and 23 a and is slightly shorter than the entire length of the frame body 21, and the frame of the second moving member 12. It is located below the body 40, the manual release locking arm 42, and the manual release hook 20. Further, as shown in FIGS. 11 and 13, the support shaft guide 24 has rectangular plate-like upper and lower wall portions 24a and 24b (guide plate portions) and both side edges of the upper and lower wall portions 24a and 24b. From the side wall part 24c which connects parts up and down, it is formed in the cross-sectional view horizontally long flat rectangular tube shape, and the slit 24d is formed in the lower surface wall part 24b. The slit 24d reaches the end of the bottom wall 24b on the door closing side. Further, as shown in FIGS. 11 and 12, a plurality of notches 24e are formed on both side wall portions 24c of the support guide 24 for positioning the support guide 24, and notches are formed on the inner surfaces of the frame members 22 and 23. Engagement protrusions 22c and 23c that engage with 24e are formed.

  As shown in FIG. 12, the support shaft 6 guided by the support shaft guide 24 includes a metal core member 60 supported by the support shaft guide 24 and a metal cylindrical body 61 that supports the link 4. I have. Specifically, the core member 60 includes a cylindrical shaft portion 60a that vertically passes through the slit 24d of the support shaft guide 24 and is guided to the lower surface wall portion 24b, and laterally at the upper end portion of the shaft portion 60a. From the protruding collar part 60b, it is formed in a T shape as a whole. And the collar part 60b is located inside the spindle guide 24, is supported by the lower surface wall part 24b, and slides on the inner surface of the lower surface wall part 24b. Further, the collar portion 60b is rectangular as shown in FIG. 10 and is configured so as not to rotate relative to the support guide 24, and both side surfaces thereof are opposed to and guided by the inner surface of the side wall portion 24c of the support guide 24. Is done. The shaft portion 60a has a female screw portion having a predetermined depth so that a bolt 62 as a fixing member is screwed from the lower end thereof.

  A cylindrical body 61 is attached to the shaft portion 60 a of the core member 60. The cylindrical body 61 is formed with an upper portion 61a that slides on the outer surface of the lower wall portion 24b of the support guide 24, and a support surface on which the outer peripheral surface rotatably supports the link 4. And a lower portion 61b. The link 4 is rotatably supported on the support surface of the cylindrical body 61 via a sleeve 8 made of, for example, resin with an upper collar. The link 4 is supported by the washer 63 from below by screwing the bolt 62 into the core member 60 through the washer 63 having a diameter larger than that of the support surface. Further, the lower end surface 61c of the cylindrical body 61 is located below the lower end surface 60c of the shaft portion 60a of the core member 60. Therefore, when the bolt 62 is tightened, the core member 60 is attracted downward, and the cylindrical body The lower surface wall portion 24 b of the support shaft guide 24 is vertically sandwiched between the upper end surface of 61 and the lower surface of the flange portion 60 b of the core member 60, and the support shaft 6 is fixed to the support shaft guide 24. A recess is formed in each of the central portion of the lower surface of the flange portion 60b and the central portion of the upper end surface of the cylindrical body 61, and the lower surface of the flange portion 60b and the upper end surface of the cylindrical body 61 are supported at the respective peripheral portions. The shaft guide 24 abuts on the lower wall portion 24b. Further, for the movement of the support shaft 6, an opening 21 a is formed along the upper frame 100 on the lower surface of the frame body 21 as shown in FIG. 10, and the opening 21 a is wider than the slit 24 d of the support guide 24. is there.

  The emergency door closing device configured as described above normally holds the door 102 at a predetermined opening angle, but can easily adjust the opening angle of the door 102 after construction on the upper frame 100. . That is, when the bolt 62 is loosened, the support shaft 6 can slide along the slit 24 d of the support shaft guide 24. Therefore, the support shaft 6 can be moved to the door opening side as shown in FIGS. 9 and 10, or the support shaft 6 can be moved to the door closing side as shown in FIGS. The support shaft 6 can be fixed at an arbitrary position by tightening. Thus, by moving the support shaft 6 along the support guide 24, the distance from the support shaft 6 to the holding means 5 can be changed. When the distance from the support shaft 6 to the holding means 5 is increased, the opening angle is increased. However, if the distance is shortened, the opening angle increases. FIG. 16 shows the state of the door 102 when the support shaft 6 is moved to the open door side to the maximum. The opening angle exceeds 90 degrees, and FIG. 17 shows the support shaft 6 moved to the door closing side. The state of the door 102 is shown, and the opening angle is smaller than 90 degrees. Further, since the support shaft 6 is configured to slide, the opening angle can be easily adjusted and the opening angle can be finely adjusted. From the maximum opening angle as shown in FIG. 16, the minimum opening angle as shown in FIG. The opening angle can be arbitrarily set within the range up to the opening angle. Since the bolt 62 located at the lower end of the support shaft 6 protruding downward from the upper frame 100 is tightened or loosened in this way, the bolt 62 is operated from the outside of the upper frame 100 after the construction, and the opening angle of the door 102 is increased. Can be easily adjusted.

  Furthermore, the frame 21 of the first moving member 11 is made of resin to improve the slidability with the metal casing 2, while the support guide 24, which is a member that supports the support shaft 6, is made of metal. The necessary strength is ensured, and both the slidability with respect to the casing 2 and the strength for supporting the support shaft 6 are achieved. Moreover, since the frame body 21 is composed of a pair of left and right frame members 22 and 23 and the support shaft guide 24 is sandwiched between the left and right frame members 22 and 23, the assembly workability of the first moving member 11 is good.

  Further, as shown in FIGS. 9, 12, and 14, since the support shaft guide 24 is disposed below the manual release locking arm 42 and the manual release hook 20, the support shaft 6 is moved to the second position. It can be moved to the moving member 12 side. Accordingly, the support shaft 6 can be moved a long distance so as to straddle the locking portion between the manual release locking arm 42 and the manual release hook 20, and the adjustment amount of the opening angle of the door 102 can be increased. .

  In this embodiment, the lower wall 24b of the flat rectangular cylindrical support shaft guide 24 is a plate-shaped guide plate portion. However, the support shaft guide 24 is not a rectangular tube but a single plate. It is good also as a guide plate part. However, the strength of the support guide 24 is improved by making it a rectangular tube shape, and at the same time, there is an advantage that it is stabilized when sandwiched between the left and right frame members 22 and 23.

  In the above embodiment, the support shaft 6 is configured to be relatively movable with respect to the other components of the first moving member 11. For example, the frame 21 is divided into two parts in the vertical direction so as to be relatively movable with respect to each other. A fixing member that prevents the relative movement of the two may be exposed from the upper frame 100 separately from the bolt 62. Note that the fixing member may be exposed in such a manner that it can be operated from the outside such as the lower side of the upper frame 100 without projecting the fixing member downward from the upper frame 100. In addition, it is possible to provide a configuration in which the second moving member 12 can be moved relative to the second moving member 12 instead of the first moving member 11, but the structure of the second moving member 12 is complicated and a part separate from the support shaft 6. Since it is also necessary to provide a fixed member on the first moving member 11, it is preferable to provide a structure capable of relative movement in the first moving member 11. In particular, if the bolt 62 of the support shaft 6 is used as a fixing member as described above, a separate fixing member is not required, and the bolt 62 is positioned below the link 4 so that the operation is easy.

  Moreover, in the said embodiment, although the moving member 3 demonstrated to the example the structure which consists of the 1st moving member 11 and the 2nd moving member 12, the moving member 3 was made into the single structure, the single moving member 3 may be configured to be held by the holding means 5. That is, the holding means 5 may be configured to electrically release the holding of the single moving member 3 in an emergency and also to release the holding manually.

The top view of the door opening state which shows the attachment state of the closure apparatus of one Embodiment of this invention. The front view of the open door state corresponding to FIG. The side view of the closed state containing the partial cross section which shows the attachment state of the closure apparatus. The top view of a closed state containing the partial cross section which shows the attachment state of the closure apparatus. FIG. 5 is a front view of a closed state including a partial cross section corresponding to FIG. 4. The top view of a closed state containing the partial cross section which shows the attachment state of the closure apparatus. The front view of a closed state containing the partial cross section corresponding to FIG. Sectional drawing which looked at the principal part of the closure device from the lower part. The front view containing the partial cross section which shows the principal part of the closure apparatus. The bottom view containing the partial cross section which shows the principal part of the closure apparatus. The bottom view of the components currently used for the closure device. FIG. 10 is a cross-sectional view taken along line P-P in FIG. 9. The QQ sectional view taken on the line of FIG. The front view containing the partial cross section which shows the principal part of the closure apparatus. The bottom view containing the partial cross section which shows the principal part of the closure apparatus. The top view which shows the state of the largest opening angle in the attachment state of the closure apparatus. The top view which shows the state of the minimum opening angle in the attachment state of the closure apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Door closer, 2 ... Casing, 2a ... Upper part, 2b ... Side part, 2c ... Gutter part, 2d ... Lid body, 2e ... Opening, 3 ... Moving member, 4 ... Link, 5 ... Holding means, 6 ... Support shaft, 7 ... Cover, 7a ... Long hole, 8 ... Sleeve, 10 ... Main shaft, 11 ... First moving member, 12 ... Second moving member, 20 ... Manual release hook, 21 ... Frame body, 21a ... Opening, 22 , 23: Frame member, 22a, 23a ... Main part, 22b, 23b ... Arm part, 22c, 23c ... Engagement projection, 24 ... Support shaft guide, 24a ... Upper surface wall part, 24b ... Lower surface wall part (guide plate part) 24c ... side wall, 24d ... slit, 24e ... notch, 25 ... screw, 40 ... frame, 41 ... support, 42 ... locking arm for manual release, 43 ... roller, 44 ... spring, 45 ... nut, 46 ... Electric release hook, 46a ... Base portion, 51 ... Locking pin, DESCRIPTION OF SYMBOLS 0 ... Core material, 60a ... Shaft part, 60b ... Gutter part, 60c ... Lower end surface, 61 ... Cylindrical body, 61a ... Upper part, 61b ... Lower part, 61c ... Lower end surface, 62 ... Bolt (fixing member), 63 ... Washer , 100 ... upper frame, 100a ... lower surface upper step part, 100b ... step part, 101 ... hinge, 102 ... door, 102a ... recess, 103 ... casing support member, A ... door opening direction, B ... door closing direction, T ... vertical direction Axis of the S, the trajectory of the main axis

Claims (3)

The door closer attached to the door rotating around the vertical axis, the movable member installed on the upper frame and movable along the upper frame, the door closer and the movable member are connected to move the closing force by the door closer A link that acts on the member, and a holding means that is fixedly installed on the upper frame and that holds the moving member at all times so that the moving member does not move to the closing side by the closing force of the door closer and releases the holding in an emergency. In the emergency door closing device,
A part of the moving member is configured to be relatively movable along the upper frame with respect to the other part so that a separation distance along the upper frame from the connection portion between the link and the moving member to the holding means can be adjusted. An emergency door closing device characterized in that a fixing member for preventing relative movement is exposed from the upper frame so that it can be operated from the outside of the upper frame.   The moving member includes a support shaft protruding downward from the upper frame to rotatably support the link, and the support shaft is configured to be relatively movable along the upper frame with respect to other portions of the moving member, 2. The emergency door closing device according to claim 1, wherein the fixing member for preventing relative movement of the support shaft is provided on the support shaft.   The moving member includes a plate-like guide plate portion having a slit along the upper frame, and the support shaft is positioned below the guide plate portion and has a cylindrical body having a support surface for supporting the link, and the tube And a core member having a shaft portion inserted through the slit and penetrating the slit and a flange portion that is located above the guide plate portion and protrudes laterally from the shaft portion. 3. An emergency according to claim 2, wherein the guide plate portion is vertically clamped between the cylindrical body and the flange portion of the core member by being screwed into the shaft portion of the shaft to prevent relative movement of the support shaft. Door closing device.

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