JP6296790B2 - Door guard structure - Google Patents

Description

  The present invention relates to a door guard structure that locks a door that opens and closes in the width direction of an opening so that the door can be opened and closed within a predetermined range close to full closure.

Conventionally, in this type of invention, for example, as described in Patent Document 1, a door body (sliding door 1) that opens and closes in the width direction of the opening, and an upper and lower sides from the upper end of the door body (sliding door 1). The rod (22) which can be projected and retracted in the direction, the receiving member (lock receiving bracket 31) fitted to and detached from the rod (22) on the protruding direction side of the rod (22), and the door end of the door (sliding door 1) And an upper frame (2) extending in the lateral width direction on the upper side of the door (sliding door 1), and the amount of opening operation of the closed door (sliding door 1) is determined by the rod (22). There is a door guard mechanism which is regulated by fitting with the receiving member (lock receiving bracket 31).
According to this prior art, the receiving member (lock receiving bracket 31) includes a round hole-shaped rod insertion hole (31b) that receives the head (22a) of the rod (22), and a small-diameter portion of the rod (22) ( 22b) and a long slide hole (31c) for slidably receiving only. When the door body (sliding door 1) is substantially fully closed and the rod (22) is fitted to the receiving member (lock receiving bracket 31), the small-diameter portion (22b) of the rod (22) is inserted into the slide hole ( 31c), the door body (sliding door 1) can be opened and closed only within a predetermined range close to the fully closed state.

  However, according to the prior art, when the vertical frame or the upper frame (2) is deformed due to, for example, an earthquake in the substantially fully closed state in which the rod (22) is fitted to the receiving member (lock receiving bracket 31). The head (22a) located on the slide hole (31c) side cannot move into the round hole-shaped rod insertion hole (31b), and the rod (22) is removed from the receiving member (lock receiving bracket 31). There is a possibility that the door (sliding door 1) cannot be opened.

JP2013-167052A

  This invention is made | formed in view of the said conventional situation, The process made into the subject is providing the door guard structure which can prevent that a door becomes unopenable due to a deformation | transformation etc. is there.

One means for solving the above problems is a door body that opens and closes with the width direction of the opening as an opening and closing direction, a rod that can protrude and retract from the door body in a direction intersecting the opening and closing direction, and a protruding direction side of the rod In the width direction of the opening on the upper side of the door body, a receiving member fixed to the immovable part so as to be fitted to and removed from the rod, a vertical frame provided facing the door tip of the door body A door guard structure that regulates an opening operation amount of the door in the closed state by fitting the rod and the receiving member, the rod including a base shaft portion, A head portion that is located on the protruding end side of the base shaft portion and that is thicker than the base shaft portion is integrally formed, and the receiving member is a fitting / removing hole that can be inserted through the head portion, and is opened from the fitting / removing hole. And continuously extending in the direction side, the head cannot be inserted and A guide hole having a size allowing the base shaft portion to be loosely inserted, and the first gap in the opening / closing direction between the fitting / removing hole and the head is formed between the fitting / removing hole and the head. The receiving member is set to be larger than a second gap in a direction perpendicular to the opening / closing direction, and the receiving member includes a supporting member fixed to the immovable part and a receiving body detachably attached to the supporting member. And the receiving body has the fitting hole and the guide hole .

  Since the present invention is configured as described above, the door can be prevented from becoming unopenable due to deformation or the like.

It is a front view which shows typically the door guard structure which concerns on this invention. The receiving member is schematically shown with the engagement portion omitted, wherein (a) is a top view and (b) is a cross-sectional view taken along the center line of (a). A state in which the door is fitted to the vertical frame is shown, (a) is a view of the door, the receiving member and the vertical frame as viewed from above, (b) is a view in which the receiving member is omitted from (a), (c) is It is the structural view which looked at the door-end side part of the door guard structure from the front, and has cut and shown the principal part. The state which has a 3rd clearance gap between a vertical frame and a door tip is shown, (a) is the figure which looked at the door body, the receiving member, and the vertical frame from the upper direction, (b) omits the receiving member from (a). (C) is a structural view of the door guard side portion of the door guard structure as viewed from the front, with the main part cut away. It is a perspective view which shows an example of a receiving member and a rod front-end | tip part.

The first feature of the present embodiment is that a door that opens and closes with the width direction of the opening as the opening and closing direction, a rod that can protrude and retract from the door in a direction intersecting the opening and closing direction, and a protruding direction side of the rod In the width direction of the opening on the upper side of the door body, a receiving member fixed to the immovable part so as to be fitted to and removed from the rod, a vertical frame provided facing the door tip of the door body A door guard structure that regulates an opening operation amount of the door in the closed state by fitting the rod and the receiving member, the rod including a base shaft portion, A head portion that is located on the protruding end side of the base shaft portion and that is thicker than the base shaft portion is integrally formed, and the receiving member is a fitting / removing hole that can be inserted through the head portion, and is opened from the fitting / removing hole. The head continuously extending in the direction side, the head cannot be inserted, and the base And a first gap in the opening / closing direction between the fitting / removing hole and the head is between the fitting / removing hole and the head. It is set larger than the second gap in the direction orthogonal to the opening / closing direction.
Here, the “door body” may be anything that can be opened and closed in the width direction of the opening, and this door body is a sliding door or a door body that opens and closes like a sliding door connected to the door end side of a folding door. Etc.
In addition, the “rod that can protrude from the door body in a direction intersecting with the opening / closing direction” protrudes upward from the upper end of the door body and sinks downward, and protrudes downward from the lower end of the door body and sinks upward. And a mode of appearing and descending in the door thickness direction from the front surface or the back surface of the door body.
Further, the “immobilized part” may be any part that is immovable relative to the door body that opens and closes in the opening width direction. The immovable part includes a vertical frame, an upper frame, a lower frame, a door pocket, Including floor surface. In addition, in the sliding-type sliding door device having two doors, one door can be the door and the other door can be the stationary part.
Further, the "first gap" includes a gap between the fitting / removal hole inner edge and the head on the door closing direction side with respect to the base shaft portion, and a door opening direction side with respect to the base shaft portion. It includes both of the inner edge of the fitting / removing hole and the gap between the head and includes a case where one of the two gaps is zero, preferably the latter gap of the two gaps. A non-zero configuration is assumed.
According to the configuration, since the fitting / removing hole secures a relatively long first gap between the head and the head, the tip end side of the rod and the receiving member are fitted with each other, For example, even when a vertical frame, a stationary part, or the like is inclined in the opening width direction due to an earthquake or the like, it is possible to prevent the head from being caught by the guide hole and coming out.

As a second feature, the vertical frame is formed with a recess capable of fitting and removing the door in the opening and closing direction,
The first gap is in a range from a state in which the door body is fitted with the door to the recess to a state in which a third gap between the door and the edge of the recess is 5 mm or less. The fitting / removing hole is set so as to be fitted / removable on the head.
According to this configuration, the gap between the door tip and the edge of the recess when fully closed is set to an interval where it is difficult to pinch a finger or the like, and the head is prevented from being caught by the guide hole. Can do.

  As a third feature, as a particularly preferable specific aspect, the receiving member is fixed to the upper frame which is the immobile portion, and the rod is protruded from the upper end of the door body in the vertical direction to the receiving member. I tried to detach it.

As a fourth feature, it is assumed that the vertical frame is tilted within a preset interlayer deformation angle α radians by a rotational motion with a portion below the upper end of the vertical frame as a fulcrum, and the receiving member When the distance between the fulcrum and the fulcrum is L, the gap X on the opposite side of the first gap with respect to the direction in which the upper end side of the vertical frame is tilted is defined as the interlayer deformation angle α radians and the distance L (See FIG. 1).
That is, the inventor of the present application, even if the vertical frame is tilted within an interlayer deformation angle α radians due to an earthquake or the like after intensive research, if the gap X is set by the calculation, the head is a receiving member. It was found that it can effectively prevent from getting out of the way.

  As a fifth feature, as a particularly preferable aspect, a key member is provided below the upper end portion of the door body so as to protrude from the door tip in a closing direction, and the key member is provided on the vertical frame. An engaging / disengaging recess capable of engaging / disengaging is provided, and the fulcrum is a portion where the key member and the engaging / disengaging recess contact or approach in the vertical direction.

  As a sixth feature, as a more preferable aspect, the fulcrum is a contact portion between the vertical frame and an immovable portion facing a lower end portion of the vertical frame.

As a seventh feature, the receiving member includes a support member fixed to a non-moving portion, and a receiving body detachably attached to the supporting member. The guide hole is provided.
According to this configuration, in the unlikely event that the rod cannot be removed from the receiving member, the receiving body constituting the receiving member can be removed from the support member, and the rod can be easily removed.

Next, a preferred embodiment having the above features will be described in detail with reference to the drawings.
The illustrated door guard structure is an example applied to a hanging type sliding door device.
As shown in FIG. 1, the sliding door device includes a door body 10 that opens and closes with the width direction of the opening A as the opening and closing direction, and a crossing direction from the door body 10 to the opening and closing direction (in the illustrated example, the opening and closing direction is approximately the opening and closing direction). A rod retracting device 13 for projecting and retracting the rod 13a in the vertical direction), a receiving member 20 fixed to an immovable part so as to be fitted to and detached from the rod 13a on the projecting direction side of the rod 13a, and a door tip of the door body 10 And an upper frame 40 extending in the width direction of the opening A on the upper side of the door body 10 and receiving the amount of opening operation of the fully closed door body 10 with the rod 13a. A door guard structure that is restricted by fitting with the member 20 is configured.

  The door body 10 includes a door body 11 having a substantially rectangular shape when viewed from the front, a suspension wheel 12 that protrudes upward from the upper end of the door body 11 and is rotatably supported, and a rod protrusion / displacement provided on the door tip side of the door body 11. The device 13 and a key device 14 provided below the rod retracting device 13 on the door end side are provided, and the opening A surrounded by the left and right vertical frames 30, the upper frame 40, the floor surface and the like is opened and closed. To do.

The rod retracting device 13 moves the rod 13a in the door main body 11 to the upper end of the door main body 11 by an operation of rotating a lever 13b provided on the front portion of the door main body 11 (an operation of rotating 180 degrees forward according to FIG. 1). For example, a well-known French dropping structure is used.
The rod retracting device 13 in the illustrated example is maintained in a state in which the rod 13a moves upward and protrudes upward from the door body 11 when the lever 13b is pulled and rotated downward, and the lever 13b rotates upward. In the returned state, the rod 13a moves downward and is immersed in the door main body 11.
The door body 10 is suspended from a guide rail 41 in the upper frame 40 by a plurality of suspension vehicles 12, and the lower end side is fitted with a guide roller (not shown) on the floor surface, so that the door body 10 moves straight in the lateral width direction. .

The rod 13a has a base shaft portion 13a1 and a head portion 13a2 which is located on the protruding end side of the base shaft portion 13a1 and is thicker than the base shaft portion 13a1, and is integrally formed of a hard material such as a metal material (FIG. 5). reference).
The base shaft portion 13 a 1 has a long cylindrical shape extending in the vertical direction on the upper side in the door main body 11. Further, the head portion 13a2 has a short cylindrical shape having an outer diameter larger than that of the base shaft portion 13a1.
In addition, the cross-sectional shape of the base shaft portion 13a1 and the head portion 13a2 is not limited to a circle, and may be arbitrary.

Further, the key device 14 rotates the key member 14a by operating a key inserted into the keyhole or operating a lever provided on the opposite side of the keyhole, and the engaging / disengaging recess 32 (receiving portion) on the vertical frame 30 side. It is a device having a well-known structure that is locked by being hooked on a seat (sometimes referred to as a seat) or released by a reverse rotation operation by the key or the lever. As shown in FIG. 1, the key member 14a is a metal member having an L shape in front view, and may be called a sickle bolt or the like.
In the illustrated key device 14, the key member 14 a is rotated from below and brought into contact with or close to the upper end of the opening edge of the engaging / disengaging recess 32 on the vertical frame 30 side in a substantially horizontal state. This state is maintained by a well-known locking mechanism in the key device 14.

  As shown in FIG. 5, the receiving member 20 is configured integrally with a support member 21 fixed to the upper frame 40 that is a stationary part and a receiving body 22 that is detachably attached to the support member 21. .

  The support member 21 is formed in an L shape composed of a vertical piece portion 21a and a horizontal piece portion 21b, and a horizontal U shape in which the head portion 13a2 of the rod 13a can be loosely inserted into the horizontal piece portion 21b and penetrated upward. Has a notch 21b1 (see FIG. 5). The notch 21b1 is formed in a long shape in the door opening / closing direction so as to include a fitting / removing hole 22a1 and a guide hole 22a2 described later. The support member 21 is fixed to the upper frame 40 by fixing means such as screwing, riveting, or welding.

Further, as shown in FIG. 5, the receiving body 22 is a metal member that is fitted to the support member 21 from the door opening direction side, and is supported by a fastening member 23 such as a screw or a bolt. It is fastened to be removable. More specifically, the receiving body 22 includes a flat plate portion 22a having a substantially rectangular flat plate shape, and engaging portions 22b and 22b protruding upward from both ends in the door thickness direction of the flat plate portion 22a. In the flat plate portion 22a, a fitting / removing hole 22a1 and a guide hole 22a2 are formed.
From the viewpoint of improving workability such as maintenance and replacement, the fastening device 23 is preferably detachable from the lower side of the receiving body 22 as shown in FIG.
Further, according to the illustrated example, the engaging portion 22b protrudes upward in an inverted L-shaped cross section, but the engaging portion 22b has a shape other than the illustrated example as long as the support member 21 can be engaged. Is possible. Further, the engaging portion 22b can omit the bent portion on the upper end side or the entire engaging portion 22b as long as the support member 21 and the receiving body 22 can be firmly fixed only by the fasteners 23. It is.

The fitting / removing hole 22a1 is formed in a slot shape elongated in the extending direction of the guide hole 22a2, and communicates with the door closing direction side of the guide hole 22a2 in a state where the support member 21 and the receiving body 22 are fixed. doing.
Between the fitting / removing hole 22a1 and the head 13a2 when inserted into the fitting / removing hole 22a1, as shown in FIG. ) And a second gap (gap Y1, Y2) in a direction orthogonal to the opening / closing direction.
The guide hole 22a2 has a width dimension, a length, and the like so that the head portion 13a2 of the rod 13a cannot be inserted and only the base shaft portion 13a1 is slidably inserted.

The first gap will be described in detail. As shown in FIG. 2A, the inner edge of the fitting / removing hole 22a1 and the head 13a2 on the door closing direction side (left side in the illustrated example) with respect to the base shaft portion 13a1. The maximum clearance in the opening / closing direction between the outer peripheral surface is X1, and the space between the inner edge of the fitting / demounting hole 22a1 and the outer peripheral surface of the head 13a2 on the door opening direction side (right side in the illustrated example) with respect to the base shaft portion 13a1. When the maximum gap in the opening / closing direction is X2, the first gap is a gap obtained by combining the gap X1 and the gap X2.
Further, the second gap has an inner edge of the fitting hole 22a1 and the head 13a2 located on both sides of the head 13a2 in the door thickness direction (vertical direction according to FIG. 2A) perpendicular to the door opening / closing direction. This is a gap obtained by combining gaps Y1 and Y2 with the outer peripheral surface.
The first gap is set larger than the second gap.

Each engaging portion 22b of the receiving body 22 is a member having a concave cross-section facing the other engaging portion 22b, and is continuous in the door thickness direction along the edge of the receiving body 22 in the door thickness direction ( (See FIG. 5). The receiving body 22 is inserted and fitted between the engaging portions 22b and 22b from the door opening direction side. The receiving body 22 is fixed to the support member 21 with a fastening tool 23 (screw or bolt). In this fixed state, the fitting / removing hole 22a1 and the guide hole 22a2 of the receiving body 22 are overlapped with the space in the notch 21b1 in the vertical direction.
In addition, if the fastening tool 23 is loosened, the receiving body 22 can be removed from the support member 21.

The vertical frame 30 is a member that faces the door tip of the door body 10 and continues in the vertical direction.
On the surface of the vertical frame 30 facing the door 10, a recess 31 (see FIG. 3) for fitting and removing the door tip of the door 10 to be opened and closed, and an engagement / disengagement recess 32 for engaging and disengaging the key member 14 a (FIG. 1). Reference) is formed.

  The concave portion 31 is formed in a concave groove shape that continues over the entire length of the door body 10 in the height direction. In addition, according to the example shown to Fig.3 (a) (b), in the state in which the door tip of the door 10 fitted in the recessed part 31, a clearance gap between the door tip of the door 10 and the recessed part 31 inner bottom part. The door tip of the door body 10 is configured to partially abut against the inner bottom portion of the recess 31 in the vicinity of the engagement / disengagement recess 32.

Further, the engaging / disengaging recess 32 is formed so that the key member 14a is inserted and latched.
More specifically, the L-shaped key member 14a having a bent portion on the protruding end side is brought into contact with or close to the upper end of the opening edge of the engagement / disengagement recess 32 with the portion closer to the door body 11 than the bent portion, The bent portion is hooked in the engagement / disengagement recess 32. The contact or adjacent portion is treated as a fulcrum P in the calculation for obtaining the first gap described later.
And the vertical frame 30 of the said structure is extended in the column shape upwards from the floor surface or the lower frame, and is connected to the one end and the other end of the horizontal width direction of the upper frame 40, respectively, It is fixed to the wall of the building to be installed.

The upper frame 40 is a member that continues in the horizontal width direction between the upper end sides of the left and right vertical frames 30, 30, and the guide rail 41, the receiving member 20, and the like are fixed therein. The guide rail 41 is a rail-like member that extends in the door body opening / closing direction, and receives the suspension wheels 12, 12 on the upper end side of the door body 10 so as to allow rolling.
Further, in the upper frame 40, an opening / closing drive device (for example, a device that pulls the door body 10 with a wire wound around a reel, a door body 10 or the like) that drives the door body 10 in a closing direction or an opening direction as necessary. A linear motor that opens and closes the door 10), a damper device that alleviates the impact when the door 10 is fully closed, and the like.

Here, if it demonstrates in detail about the 1st clearance gap (refer FIG. 2) mentioned above, from the state (refer FIG.3 (b)) in which the door body 10 fitted the door tip to the recessed part 31 of the vertical frame 30, There is a third gap X3 (see FIG. 3) penetrating in the door thickness direction between the door tip 10a of the door body 10 and the edge 31a of the recess 31 (in other words, the end face of the vertical frame 30 on the door body opening direction side). The first gap (= X1 + X2) is set so that the fitting / removing hole 22a1 can be fitted / removed to / from the head 13a2 within a range of 5 mm or less and 0 mm or more (see FIG. 4B). The The third gap X3 is a gap set with reference to the fact that a finger or the like does not enter.
With the above setting, the rod 13a with respect to the receiving body 22 is within the range of the state in which the door 10 is fitted in the recess 31 and the state in which the door 10 has the third gap X3 between the vertical frame 30. Can be attached and detached.

  Further, in the present embodiment, the rotation with the fulcrum P as the fulcrum P is a portion below the upper end portion of the vertical frame 30 (the portion where the key member 14a and the engagement / disengagement recess 32 contact or approach each other). Assuming that the vertical frame 30 is tilted within a predetermined interlayer deformation angle α radians by the movement, and assuming that the distance in the vertical direction between the receiving member 20 and the fulcrum P is L, the first gap Among them, the gap (X1 or X2) on the opposite side to the direction in which the upper end side of the vertical frame 30 is tilted is obtained by multiplying the interlayer deformation angle α radians and the distance L.

More specifically, it is assumed that, for example, due to an earthquake or the like, the vertical frame 30 is tilted in one direction by the rotation about the fulcrum P as indicated by the solid line in FIG. When the distance in the vertical direction between the receiving member 20 and the contact portion P is L, the gap X1 on the opposite side (left side in the illustrated example) with respect to the direction in which the upper end side of the vertical frame 30 is inclined (see FIG. 2) ) Is a value obtained by multiplying the interlayer deformation angle α2 radians and the distance L.
Similarly, as shown by a two-dot chain line in FIG. 1, it is assumed that the vertical frame 30 is inclined to the other direction by an interlayer deformation angle α1 radians by rotating around the fulcrum P, and the receiving member 20 and the contact portion P The gap X2 (see FIG. 2) on the side opposite to the direction in which the upper end side of the vertical frame 30 is inclined (see FIG. 2) is the distance between the interlayer deformation angle α1 radians and the distance. Multiplying with L.
Here, for example, values defined by the Building Standards Law Enforcement Ordinance or the like can be used as the interlayer deformation angles α1 and α2.
For example, when the interlayer deformation angles α1 and α2 are 1/120 radians and the distance L is 1500 mm, the gaps X1 and X2 are 12.5 mm, respectively.

  In the above embodiment, the distance X from the contact portion P between the key member 14a and the engagement / disengagement recess 32 to the upper end of the vertical frame 30 is L, and the gaps X1 and X2 are obtained as described above. In the case of a mode that does not have the key member 14a, the rotary motion with the fulcrum as the fulcrum is a contact portion between the vertical frame 30 and the non-moving part (for example, the floor surface or the lower frame) facing the lower end portion in the event of an earthquake or the like. Therefore, the gaps X1 and X2 are obtained by using the distance L ′ (see FIG. 1) between the receiving member 20 and the contact portion instead of the distance L.

  According to the sliding door device and the door guard structure configured as described above, the vertical frame 30 is placed in the door opening / closing direction due to, for example, an earthquake or the like in a state where the distal end side of the rod 13a and the fitting hole 22a1 of the receiving member 20 are fitted. Even when tilted to one side, the head 13a2 has two gaps X1 and X2 constituting the first gap, so that the head 13a2 is fitted on and off from the edge on the guide hole 22a2 side and the opposite side (left side in FIG. 2). It is possible to prevent the hook 22a1 from being caught by the edge or the like.

  In the unlikely event that the rod 13a cannot be removed from the receiving member 20, the receiving body 22 can be freely moved in the door thickness opening / closing direction by loosening the fastener 23, so that the rod 13a is removed. Can do.

  Note that, according to the illustrated example, the two gaps X1 and X2 constituting the first gap are set to approximately the same size, but as another example, these gaps X1 and X2 are set to different dimensions. In this case, it is preferable to make the gap X2 larger than the gap X1 so that the engagement / disengagement due to the catch on the guide hole 22a2 side can be effectively reduced.

  Moreover, according to the said Example, although the door guard structure which concerns on this invention was applied to the sliding door apparatus, as another example, the door body which opens and closes the door guard structure on the door end side of a folding door in the shape of a sliding door is connected. The present invention can also be applied to existing switchgears. In this case, specifically, the rod 13a is provided in the door body that opens and closes like a sliding door on the door end side of the folding door so as to protrude and retract in the vertical direction, and the rod 13a is provided at the immovable portion on the protruding direction side of the rod 13a. What is necessary is just to fix the receiving member 20 so that it may fit and detach.

  Moreover, according to the said Example, although the rod 13a protruded / recessed from the upper end of the door main body 11 to the up-down direction, as another example, the rod 13a protrudes below from the lower end of the door main body 11, or immerses upwards. It is also possible to adopt a configuration such as In this case, the receiving member 20 may be disposed so as to face the downward-facing rod 13a, and the receiving member 20 may be fixed to an immobile site such as a floor surface or a lower frame.

  As another example, the rod 13a may be configured to protrude from the front surface or the back surface of the door body 11 in the door thickness direction. In this case, the receiving member 20 may be disposed so as to face the rod 13a that appears and disappears in the door thickness direction, and the receiving member 20 may be fixed to a stationary part such as a door pocket.

  As another example, the door guard structure can be applied to a sliding type sliding door device having two doors. In this case, one door is the door body 11 and the other door is the door. With the body as the stationary part, the rod 13a may be provided in the one door body so as to appear and disappear in the door thickness direction, and the receiving member 20 may be fixed to the other door body.

  Moreover, according to the said Example, although the said door guard structure was applied to the sliding door of the sliding door system, as another example, the said door guard structure is applied with respect to the sliding door which slides on the floor surface or the rail of a lower frame. Is also possible.

  Further, according to the above embodiment, the receiving member 20 is constituted by the supporting member 21 and the receiving body 22. However, as another example, the receiving body 22 is omitted and the supporting member 21 is fitted in place of the notch portion 21b1. A hole 22a1 and a guide hole 22a2 may be provided, and the support member 21 may be used as a receiving member.

10: Door 13: Rod retracting device 13a: Rod 13a1: Base shaft portion 13a2: Head 14: Key device 14a: Key member 20: Receiving member 21: Support member 22: Receiving body 22a1: Insertion / removal hole 22a2: Guide hole 30 : Vertical frame 31: Recess 32: Engaging / disengaging recess A: Opening L, L ': Distance P: Contact part X1, X2: Gap (first gap)
Y1, Y2: gap (second gap)
X3: Third gap α1, α2: Interlayer deformation angle

Claims (5)

A door body that opens and closes with the width direction of the opening as the opening and closing direction, a rod that can protrude and retract from the door body in a direction intersecting with the opening and closing direction, and a rod that does not move so as to be fitted and removed on the rod protruding direction side. A receiving member fixed to the part, a vertical frame provided facing the door tip of the door body, and an upper frame extending in the width direction of the opening on the upper side of the door body, in a closed state A door guard structure that regulates an opening operation amount of the door body by fitting the rod and the receiving member,
The rod integrally includes a base shaft portion and a head portion positioned on the protruding end side of the base shaft portion and thicker than the base shaft portion,
The receiving member is a fitting / removing hole that can be penetrated by loosely inserting the head, and extends continuously from the fitting / removing hole to the open direction side, and the head cannot be inserted and the base shaft portion can be loosely inserted. A guide hole of a large size,
The first gap in the opening / closing direction between the fitting / removing hole and the head is set to be larger than the second gap in the direction perpendicular to the opening / closing direction between the fitting / removing hole and the head. It is,
The receiving member includes a support member fixed to a stationary part, and a receiving body detachably attached to the supporting member, and the receiving body has the fitting hole and the guide hole. Characteristic door guard structure. Fixing the receiving member to the upper frame which is the immovable portion;
The door guard structure according to claim 1, wherein the rod is protruded and retracted in an up-down direction from an upper end of the door body so as to be fitted and detached from the receiving member . Assuming that the vertical frame is tilted within a preset interlayer deformation angle α radians by a rotational movement with a portion below the upper end of the vertical frame as a fulcrum, between the receiving member and the fulcrum When the distance is L,
The gap X on the opposite side to the direction in which the upper end side of the vertical frame is inclined among the first gaps is obtained by multiplying the interlayer deformation angle α radians and the distance L. Door Guard structure of. Below the upper end of the door body, a key member is provided so as to protrude from the door tip in the closing direction, and the vertical frame is provided with an engagement / disengagement recess capable of engaging / disengaging the key member,
The door guard structure according to claim 3, wherein the fulcrum is a portion in which the key member and the engagement / disengagement recess are in contact with each other or close to each other . The door guard structure according to claim 3, wherein the fulcrum is a contact portion between the vertical frame and an immovable portion facing a lower end portion of the vertical frame .

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