JP2023120698A - Door engaging/disengaging device and door device provided with the door engaging/disengaging device - Google Patents

Abstract

To prevent a door body from undergoing opening movement when the door body is pushed at both sides of the door body.SOLUTION: A door engaging/disengaging device A provided in a door device 1 whose door body 20 can be opened when rotated to either one side or the other side is configured such that, in conjunction with a rotational operation of two knobs 51 and 52 respectively, a latch 32 in the protruding state is retracted and a first engagement portion 41 or a second engagement portion 42 on the same side as one of the knobs that was brought into rotational operation is protruded so as to be in close proximity to an engagement convex 12b.SELECTED DRAWING: Figure 4

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door engaging/disengaging device that retracts a latch to release an engaged state by operating a knob, and a door device including this door engaging/disengaging device.

2. Description of the Related Art Conventionally, there is a door device in which a door body can be turned both to the back side and to the front side, as described in Patent Document 1, for example.
In this door device, the door bottom portion of the door body and the opposing vertical frame are connected by a free hinge. The free hinge has rotating shafts on one side and the other side in the door thickness direction, respectively, and these two rotating shafts allow the door body to be opened in both directions.

Japanese Patent Application Laid-Open No. 2002-13360

By the way, according to the above-described prior art, when a person is on either side of the door and the door is pushed from the other side to perform the opening operation, the opened door moves to the one side. You may run into people.

In view of such problems, the present invention comprises the following configurations.
A door engagement/disengagement device provided in a door device capable of opening a door body by rotating it to either one side or the other side, the latch projecting and retracting from the door body in the direction of the door, and the thickness of the door body. a knob exposed on one side and the other side of the direction; a first engagement/disengagement portion protruding and retracting from the door body in the door leading direction on the one side of the latch; and the door body on the other side of the latch. The door of the door body so as to be close to both the second engagement part that appears and disappears in the direction of the door from the door, and the first engagement part and the second engagement part when it protrudes. The two knobs are provided with an engaging convex portion provided in a stationary portion facing the tip portion, and a recessed latch receiving portion provided in the engaging convex portion so as to fit the latch when protruding. , the protruding latch is retracted, and the first engaging/disengaging portion or the second engaging/disengaging portion on the same side as the rotated knob is engaged. A door engaging/disengaging device characterized by protruding so as to be close to a convex portion.

Since the present invention is configured as described above, it is possible to prevent the opening operation by pushing the door on both sides of the door.

1 is a front view showing a door device provided with an example of a door engaging/disengaging device according to the present invention; FIG. FIG. 2 is a cross-sectional view taken along line (II)-(II) in FIG. 1; FIG. 2 is a cross-sectional view taken along line (III)-(III) in FIG. 1; It is a figure which shows the state which rotated the knob of one side in the same cross section. In the same section, it is a diagram showing a state in which the knob on the other side is rotated. FIG. 3 is a cross-sectional view taken along line (VI)-(VI) in FIG. 2;

The present embodiment discloses the following features.
A first feature is a door engagement/disengagement device provided in a door device capable of opening a door body by rotating it to either one side or the other side, the door engaging/disengaging device comprising: a knob exposed on one side and the other side of the thickness direction of the door body; The second engaging/disengaging portion protruding from the door body in the direction of the door on the other side, and the first engaging/disengaging portion and the second engaging/disengaging portion when projected an engaging convex portion provided at a stationary portion facing the door tip portion of the door body; and a recessed latch receiving portion provided on the engaging convex portion so as to fit the latch when protruded. and retracting the protruded latch in conjunction with the rotation operation of each of the two knobs, and the first engaging/disengaging portion or the second engaging portion on the same side as the rotated knob. The removable portion is protruded so as to be close to the engaging projection (see FIGS. 1 to 6).

As a second feature, no rotational force is transmitted between the knob on one side and the knob on the other side (see FIGS. 4 and 5).

As a third feature, a first rotating shaft that rotates integrally with the knob on one side and a second rotating shaft that rotates integrally with the knob on the other side are provided, and the knob on the one side is When the knob on the other side is rotated, the first engaging/disengaging portion is protruded and the latch is retracted by the rotational force of the first rotating shaft when the knob is rotated. The rotation force of the rotating shaft causes the second engaging/disengaging portion to protrude and the latch to retract (see FIGS. 4 and 5).

As a fourth feature, a third rotating shaft is provided between the first rotating shaft and the second rotating shaft to allow the latch to be retracted by a rotating force, and the first rotating shaft and the third rotating shaft are arranged. A first clutch mechanism is provided between the rotating shafts for transmitting to the third rotating shaft only the rotational force of the first rotating shaft in one direction due to the opening operation by the knob on one side, Between the second rotating shaft and the third rotating shaft, only the unidirectional rotating force of the second rotating shaft accompanying the opening operation by the knob on the other side is transmitted to the third rotating shaft. A second clutch mechanism is provided (see FIGS. 2-6).

As a fifth feature, a first gear and a second gear are provided on the first rotating shaft and the second rotating shaft, respectively, and a first retractable gear that meshes with the first gear and moves back and forth A second advancing/retreating gear that meshes with the second gear and advances/retreats is provided in the first engagement/disengagement portion and the second engagement/disengagement portion, respectively, and the first engagement/disengagement portion and the second engagement/disengagement portion The detachable parts are moved in and out by advancing and retreating the first forward/retreat gear and the second forward/retreat gear (see FIG. 2).

As a sixth feature, the third rotating shaft is provided with a third gear, and the latch is provided with a third advancing/retreating gear that meshes with the third gear to advance/retreat, and this third advancing/retreating gear advances/retreats. The latch is made to appear and disappear along with (see FIGS. 2 and 6).

As a seventh feature, an urging member is provided for urging the latch in the protruding direction (see FIGS. 3 to 6).

The eighth feature is that the door device is configured with the above door engaging/disengaging device (see FIG. 1).

<Specific embodiment>
Next, specific embodiments having the above characteristics will be described in detail with reference to the drawings.
In the following description, “door width direction” means the width direction of the door body 20 . Further, the "door thickness direction" means the direction of the thickness of the door body 20 substantially orthogonal to the door width direction.
The "viewing direction" means the width direction of the frame 10 (horizontal direction according to FIG. 1). Further, the "viewing direction" means the direction of the frame thickness substantially orthogonal to the "viewing direction".

FIG. 1 shows an example of a fitting device according to the present invention.
The door device 1 includes a frame 10 having an opening inside, a door 20 closing the opening so as to be openable, and a door engaging/disengaging device for engaging/disengaging the door tip side of the door 20 with/from the frame 10. A.
This door device 1 is a door that opens by rotating the door body 20 to either one side or the other side in the door thickness direction. It has the basic structure of a so-called door.

The frame body 10 includes a door tail-side frame member 11 facing the door tail portion of the door body 20 in the closed state, a door tip-side frame member 12 facing the door tip portion of the door body 20 in the closed state, and a It includes an upper frame member 13 that faces the upper end of the door 20, and is configured in an inverted U shape in a front view surrounding an opening on the central side.
The frame 10 is fixed to an opening in the wall surface of a building or the like on which the door device 1 is to be installed.

The lower side of the frame 10 may be the floor surface or the ground, or may be a railing (lower frame member) extending between the lower end portions of the door trailing side frame member 11 and the door leading side frame member 12 .

The door end side frame member 12 has an elongated vertical frame main body 12a extending in the vertical direction, and an engaging convex portion 12b protruding from the vertical frame main body and facing the door body 20 in the fully closed state, For example, it is made of a metal material and formed in a long shape that is continuous in the vertical direction (see FIGS. 3 to 5).

The vertical frame main body 12a is formed in a long shape extending between the lower side surface such as the floor surface and the upper frame member 13, and according to the illustrated example, the surface facing the door tip portion of the door body 20 is formed flat. are doing.

The engaging convex portion 12b protrudes from the facing surface of the vertical frame main body 12a.
The engaging convex portion 12b is positioned between the first engaging/disengaging portion 41 and the second engaging/disengaging portion 42 in the door thickness direction, If one protrudes, it will be close to any of them.

The engaging projection 12b is provided with a latch receiving portion 12c having a concave cross-sectional shape (in the illustrated example, a concave groove shape) so as to fit the latch 32 when it protrudes.

According to the illustrated example, the engaging projection 12b and the latch receiving portion 12c are formed in an elongated shape over substantially the entire length of the door end side frame member 12. As shown in FIG.
The engaging protrusion 12b may be located at a height corresponding to at least a first engaging/disengaging portion 41 and a second engaging/disengaging portion 42, which will be described later, and the latch receiving portion 12c may be positioned at least at a latch described later. should be at a height corresponding to . Therefore, the engaging protrusion 12b and the latch receiving portion 12c can be partially provided in the vertical direction.

Further, according to the illustrated example, the vertical frame body 12a and the engaging projection 12b are formed as an integral member. A connected configuration is possible.

The door body 20 has two outer plates 21 spaced apart in the thickness direction and supported by a core material and an aggregate (not shown) inside the outer panels to form a rectangular door body having a predetermined thickness when viewed from the front. Configure.
Further, through holes are provided in the door tip surface of the door 20 for allowing the latch 32, the first engagement/disengagement portion 41, and the second engagement/disengagement portion 42, which will be described later, to protrude and retract.
As shown in FIG. 3, a hidden plate 22 is provided on the door tip side of the door body 20 so as to extend from each outer plate 21 in the door tip direction, if necessary. The concealing plate 22 extends continuously in the vertical direction so as to conceal the gap between the door tip surface of the door 20 and the vertical frame main body 12a, the engaging convex portion 12b, and the like. The hidden plate 22 is made of an elastic material such as rubber so that it does not interfere with the engaging projection 12b and hinder the opening and closing operation of the door 20. are adjusted accordingly.

The door 20 configured as described above opens the opening by rotating in one or the other side in the door thickness direction from a state in which the opening in the frame 10 is closed, and rotates in the opposite direction. This closes the opening.

The door bottom side portion of the door 20 is rotatably supported with respect to the frame 10 via a shaft-like member 23 such as a free hinge (see FIG. 1). The door body 20 is rotatable about the shaft-like member 23 as a central axis in both the one side and the other side in the door thickness direction.

The door engaging/disengaging device A includes a doorknob unit 30 positioned on the door tip side of the door 20, and an engaging convex portion 12b and a latch receiving portion 12c that are integrated with a vertical frame main body 12a that is a stationary portion.

The doorknob unit 30 includes a base 31 mounted on the door tip side in the door body 20, a latch 32 protruding from the base body 31 and the door body 20 in the door tip direction, and a biasing member biasing the latch 32 in the protruding direction. 33, a first engagement/disengagement portion 41 protruding from the base 31 and the door body 20 in the door edge direction on one side of the door thickness direction from the latch 32, and a door body 20 on the other side of the door thickness direction from the latch 32. A second engagement/disengagement portion 42 protruding from the door in the direction of the door, and knobs 51 and 52 exposed on one side and the other side of the door body 20 in the thickness direction.

Further, the doorknob unit 30 includes a first rotating shaft 61 that rotates integrally with the knob 51 on one side, a second rotating shaft 62 that rotates integrally with the knob 52 on the other side, and a first rotating shaft A third rotating shaft 63 is provided between 61 and the second rotating shaft 62 to retract the latch 32 by a rotating force.

Further, the doorknob unit 30 is arranged between the first rotating shaft 61 and the third rotating shaft 63 so that only one-directional rotating force of the first rotating shaft 61 associated with the opening operation by the knob 51 on one side is transferred to the third rotating shaft 63 . A first clutch mechanism 71 that transmits to the rotating shaft 63 of the second rotating shaft 62, and one of the second rotating shaft 62 accompanying the opening operation by the knob 52 on the other side between the second rotating shaft 62 and the third rotating shaft 63. and a second clutch mechanism 72 that transmits only directional rotational force to the third rotating shaft 63 .

The base body 31 is formed in the shape of a hollow box according to the illustrated example.
A wall portion of the base body 31 on the side of the door is provided with through holes for allowing the latch 32, the first engaging/disengaging portion 41, and the second engaging/disengaging portion 42 to protrude and retract.
Further, through-holes for inserting the first rotating shaft 61 and the second rotating shaft 62 are provided in the one-side wall portion and the other-side wall portion of the base body 31, respectively.

The latch 32 is formed in a block shape elongated in the width direction of the door. The width of the end portion of the latch 32 in the direction of the door is gradually narrowed into a lateral trapezoidal cross section by tapered surfaces 32b and 32c on both sides in the door thickness direction. Each tapered surface 32b, 32c may be an inclined flat surface, an inclined convex curved surface, or the like.

A lower part of the latch 32 is integrally provided with a third advancing/retreating gear 32a that meshes with a third gear 66 described later and advances/retreats.
The third forward/backward gear 32a has a plurality of teeth extending in the retracting direction of the latch 32, and these teeth are directed downward (see FIGS. 2 and 6).
The third forward/backward gear 32 a may be processed integrally with the latch 32 , or may be a member separate from the latch 32 integrally connected to the latch 32 .
The latch 32 is guided by a guide member (not shown) so as to slide in the width direction of the door.
Therefore, when the third forward/backward gear 32a advances and retreats with the rotation of the third gear 66, the latch 32 moves forward and backward in conjunction with the forward/backward movement.

The urging member 33 may be a member that urges the latch 32 toward the door edge with respect to the base 31. According to the illustrated example, a compression member provided between the latch 32 and the side wall of the base 31 is provided. It's a coil spring.
Other examples of the urging member 33 include a tension spring that pulls the latch 32 toward the front end of the door, and a torsion spring that rotates the third gear 66 in one direction to urge the latch 32 toward the front end of the door. It is also possible to use a spring or the like.

The first engagement/disengagement portion 41 is formed in a block shape elongated in the width direction of the door, and integrally has a first retraction gear 41a that meshes with the first gear 64 to move back and forth. The first reciprocating gear 41a has a plurality of teeth along the direction in which the first engagement/disengagement portion 41 appears and retracts, and these teeth face upward (see FIG. 2).
The first engagement/disengagement portion 41 is guided by a guide member (not shown) so as to slide in the door width direction.
Therefore, when the first forward/backward gear 41a advances and retreats with the rotation of the first gear 64, the first engagement/disengagement portion 41 moves in and out in conjunction with the forward/backward movement.

The second engaging/disengaging portion 42 is formed in a block shape elongated in the width direction of the door, and integrally has a second advancing/retreating gear 42a that meshes with a second gear 65 to be described later and advances/retreats on the lower side thereof. . The second reciprocating gear 42a has a plurality of teeth along the direction in which the second engaging/disengaging portion 42 appears and retracts, and these teeth face upward (see FIG. 2).
The second engagement/disengagement portion 42 is guided by a guide member (not shown) so as to slide in the door width direction.
Therefore, when the second advancing/retreating gear 42a advances and retreats with the rotation of the second gear 65, the second engaging/disengaging portion 42 moves in and out in conjunction with this advance/retreat.

A common part can be used for the first engagement/disengagement portion 41 and the second engagement/disengagement portion 42 .
In addition, the first engagement/disengagement portion 41 and the second engagement/disengagement portion 42 in the illustrated example are provided with general chamfering (C chamfering or R chamfering) at both corners on the door end side. Although the shape is different from that of the engagement/disengagement portion 41, as another example other than the illustrated example, the first engagement/disengagement portion 41, the second engagement/disengagement portion 42, and the latch 32 can all be made into a common part.

The knob 51 on one side protrudes from the surface of the outer plate 21 on one side of the door 20 and is rotated from the outside. A first rotating shaft 61, which will be described later, is fixed to the rotating shaft portion of the knob 51 so as to be integrally rotatable.
In the drawing, reference numeral 51a denotes a round seat secured to the outer plate 21 so as to cover the rotating shaft portion of the knob 51 on one side.

The knob 52 on the other side protrudes from the surface of the outer plate 21 on the other side of the door 20 and is rotated from the outside. A second rotating shaft 62, which will be described later, is fixed to the rotating shaft portion of the knob 52 so as to be rotatable therewith.
In the drawing, reference numeral 52a denotes a round seat secured to the outer plate 21 so as to cover the rotating shaft portion of the knob 51 on one side.

One side of the first rotating shaft 61 penetrates the base body 31 and the outer plate 21, and the knob 51 on one side is detachably connected to the end side thereof.
One half of the first clutch mechanism 71 is connected to the other side of the first rotating shaft 61 .
The first rotating shaft 61 is rotatably supported by a bearing member (not shown) inside the base 31 .

A first gear 64 (a pinion gear according to the illustrated example) is fixed to the center of the first rotating shaft 61 so as to be rotatable together.
The first gear 64 is arranged coaxially with the first rotating shaft 61 and meshes with the first forward/backward gear 41a (according to the illustrated example, a rack gear).

The other side of the second rotating shaft 62 passes through the base body 31 and the outer plate 21, and the knob 52 on the other side is detachably connected to the end thereof.
One half of the second clutch mechanism 72 is connected to the one side of the second rotating shaft 62 .
The second rotating shaft 62 is rotatably supported by a bearing member (not shown) inside the base 31 .

A second gear 65 (a pinion gear according to the illustrated example) is fixed to the center of the second rotating shaft 62 so as to be rotatable together.
The second gear 65 is arranged coaxially with the second rotating shaft 62 and meshes with the second forward/backward gear 42a (according to the illustrated example, a rack gear).

The first clutch mechanism 71 has one half and the other half coaxially arranged, and is configured to transmit only the unidirectional rotational force of the one half to the other half.
A one-way clutch, a clutch mechanism called a freewheel, or the like can be applied to the first clutch mechanism 71 .
A half portion of the first clutch mechanism 71 is connected to the other end of the first rotating shaft 61 so as to be capable of integral rotation. The other half of the first clutch mechanism 71 is connected to one end of the third rotating shaft 63 so as to rotate integrally therewith.

According to the first clutch mechanism 71, the rotation of the first rotating shaft 61 in one direction (clockwise when viewed from one side in the door thickness direction) accompanying the opening operation by the knob 51 on one side. Force is transmitted to the third rotating shaft 63 and the third gear 66 .
However, the turning force in the opposite direction (counterclockwise when viewed from one side in the door thickness direction) by the knob 51 on one side is not transmitted to the third rotating shaft 63 and the third gear 66. .

Further, the second clutch mechanism 72 is configured to transmit only one-way rotational force of one half to the other half, similarly to the first clutch mechanism 71 .
The second clutch mechanism 72 may be provided with a component having the same configuration as the first clutch mechanism 71 so as to be oriented in the opposite direction in the door thickness direction.
A half portion of the second clutch mechanism 72 is connected to one end of the second rotating shaft 62 so as to rotate integrally therewith. The other half of the second clutch mechanism 72 is connected to the other end of the third rotating shaft 63 so as to rotate integrally therewith.

According to the second clutch mechanism 72, one direction of the second rotating shaft 62 accompanying the opening operation by the knob 52 on the other side (according to the illustrated example, counterclockwise when viewed from the other side in the door thickness direction) Rotational force is transmitted to the third rotating shaft 63 and the third gear 66 .
However, the rotational force in the opposite direction (clockwise when viewed from the other side in the door thickness direction) by the knob 52 on the other side is not transmitted to the third rotating shaft 63 and the third gear 66 .

The third rotating shaft 63 is coaxially positioned between the first rotating shaft 61 and the second rotating shaft 62 and is rotatably supported on the base 31 via a bearing member (not shown) or the like.
A third gear 66 (a pinion gear in the illustrated example) is fixed to the center of the third rotating shaft 63 so as to be rotatable therewith.
The third gear 66 is arranged coaxially with the third rotating shaft 63 and meshes with the third forward/backward gear 32a (according to the illustrated example, a rack gear).

The doorknob unit 30 configured as described above is fixed in the door body 20 so as to abut on the rear surface of the door tip side wall portion of the door body 20 .

Next, the characteristic functions and effects of the door device 1 and the door engaging/unlocking device A configured as described above will be described in detail.
First, in the initial state where the door 20 closes the opening, as shown in FIG. The first engagement/disengagement portion 41 and the second engagement/disengagement portion 42 are recessed into the door body 20 while being fitted to the receiving portion 12c.

In the initial state, for example, as shown in FIG. 4, when the knob 51 on one side is rotated clockwise, the first rotating shaft 61 and the first gear 64 rotate in conjunction with this rotating operation. Rotate.
Therefore, the first engaging/disengaging portion 41 on the same side as the rotated knob 51 protrudes due to the rotational force of the first gear 64, and approaches the engaging convex portion 12b from one side in the projection direction.

Further, the rotational force in the first engaging/disengaging portion 41 is transmitted to the third rotating shaft 63 via the first clutch mechanism 71, and the third rotating shaft 63 and the third gear 66 are connected to the first rotates in the same direction as the rotating shaft 61 (clockwise in the illustrated example).
Therefore, the rotation force of the first rotating shaft 61 causes the latch 32 to retreat and retract into the door body 20 .

At the other end of the third rotating shaft 63, the second clutch mechanism 72 is provided in the opposite direction to the first clutch mechanism 71, so that the rotational force of the third rotating shaft 63 There is no transmission to the second rotating shaft 62 via the second clutch mechanism 72 . That is, no rotational force is transmitted between the knob 51 on one side and the knob 52 on the other side.
Therefore, the second engaging/disengaging portion 42 maintains the retracted state.

Therefore, a person who intends to open the door 20 by rotating the knob 51 on one side can only perform the operation of pulling the door 20 forward to open it. That is, the opening operation of pushing the door 20 forward is blocked by the contact of the first engagement/disengagement portion 41 with the engagement convex portion 12b.

After the door 20 is opened, when the rotational force applied to the knob 51 on one side is released, the latch 32 protrudes due to the biasing force of the biasing member 33. The detachment part 41 is retracted.

Further, when the door body 20 in the open state with the latch 32 protruding is pushed in the closing direction, the latch 32 causes the tapered surface 32b or 32c to slide against the engaging convex portion 12b. It fits into the latch receiving portion 12c so as to get over the portion 12b.
Therefore, the door body 20 stands still so as not to open to either one side or the other side.

Further, in the above initial state, for example, as shown in FIG. 5, when the knob 52 on the other side is rotated counterclockwise when viewed from the other side, the second rotation is interlocked with this rotation operation. The shaft 62 and the second gear 65 rotate, and this rotational force is transmitted to the third rotating shaft 63 and the third gear 66 via the second clutch mechanism 72, while the first rotating shaft 61 And it is not transmitted to the first gear 64, the knob 51 on one side, or the like.
For this reason, the second engaging/disengaging portion 42 on the same side as the knob 52 on the other side that has been rotated projects, approaches the engaging convex portion 12b from the other side in the projection direction, and the latch 32 retracts.
Therefore, a person who intends to open the door 20 by turning the knob 52 on the other side can only perform the operation of pulling the door 20 forward to open it. The opening operation of pushing the door 20 forward is blocked by the contact between the second engaging/disengaging portion 42 and the engaging convex portion 12b.

Therefore, according to the door device 1 and the door engaging/disengaging device A configured as described above, the door 20 is only opened forward by pulling the door 20 on either side of the door 20 . It is possible to prevent the opening to the inner side by the pushing action.

According to the above-described embodiment, due to the mechanical structure in the base 31, the protruded latch 32 is retracted in conjunction with the rotation operation of the two knobs 51 and 52, and the rotation operation is performed. The first engagement/disengagement portion 41 or the second engagement/disengagement portion 42 on the same side as the knob is protruded so as to be close to the engagement convex portion 12b. It is also possible to achieve the same operation with a different configuration.

Further, according to the above embodiment, the first gear 64 and the first retractable gear 41a, the second gear 65 and the second retractable gear 42a, and the third gear 66 and the third retractable gear 32a are Although the rack and pinion mechanism is used, this mechanism may be any mechanism that converts rotary motion into linear motion. can be a mechanism in which rack gears, pinion gears, worm gears, sprockets, bevel gears, etc. are appropriately combined.

The present invention is not limited to the embodiments described above, and can be modified as appropriate without changing the gist of the present invention.

1: Door device 10: Frame body 12: Door edge side frame member 12b: Engagement convex part 12c: Latch receiving part 20: Door body 30: Door knob unit 31: Substrate 32: Latch 32a: Third reciprocating gear 33: With Force member 41: first engaging/disengaging part 41a: first reciprocating gear 42: second engaging/disengaging part 42a: second reciprocating gear 51: knob on one side 52: knob on the other side 61: first rotation Axis 62: Second rotating shaft 63: Third rotating shaft 64: First gear 65: Second gear 71: First clutch mechanism 72: Second clutch mechanism A: Door engaging/disengaging device

Claims (8)

A door engagement/disengagement device provided in a door device capable of opening by rotating a door body to either one side or the other side,
A latch that protrudes from the door body toward the door edge, a knob that is exposed on one side and the other side in the thickness direction of the door body, and a knob that protrudes from the door body toward the door edge on the one side of the latch. a first engagement/disengagement portion, a second engagement/disengagement portion protruding from the door body in the door end direction on the other side of the latch, and the first engagement/disengagement portion and the second engagement/disengagement portion when protruded An engaging convex portion provided on a stationary portion facing the door tip portion of the door body so as to be close to any of the engaging/disengaging portions, and the engaging portion so as to fit into the latch when protruding. a concave latch receiving portion provided on the convex portion,
The first engaging/disengaging portion or the second engaging/disengaging portion located on the same side as the rotated knob is retracted in the protruded latch in conjunction with the rotation of each of the two knobs. is protruded so as to be close to the engaging convex portion. 2. The door engaging/disengaging device according to claim 1, wherein no rotational force is transmitted between said knob on one side and said knob on the other side. A first rotating shaft that rotates integrally with the knob on one side and a second rotating shaft that rotates integrally with the knob on the other side,
When the knob on one side is rotated, the rotational force of the first rotating shaft protrudes the first engaging/disengaging portion and retracts the latch,
2. When the knob on the other side is rotated, the rotation force of the second rotating shaft protrudes the second engaging/disengaging portion and retracts the latch. 3. The door engaging/unlocking device according to 2. A third rotating shaft is provided between the first rotating shaft and the second rotating shaft, and the latch is retracted by a rotating force;
Between the first rotating shaft and the third rotating shaft, only the unidirectional rotating force of the first rotating shaft accompanying the opening operation by the knob on one side is transmitted to the third rotating shaft. A first clutch mechanism is provided for
Between the second rotating shaft and the third rotating shaft, only the unidirectional rotating force of the second rotating shaft accompanying the opening operation by the knob on the other side is transmitted to the third rotating shaft. 4. The door engaging/disengaging device according to claim 3, further comprising a second clutch mechanism for engaging and disengaging. A first gear and a second gear are provided on the first rotating shaft and the second rotating shaft, respectively, and the first retractable gear and the second gear that mesh with the first gear and move forward and backward are provided. A second advancing/retreating gear that engages and advances/retreats is provided in each of the first engagement/disengagement portion and the second engagement/disengagement portion, and the first engagement/disengagement portion and the second engagement/disengagement portion are respectively connected to the 5. A door engaging/disengaging device according to claim 3 or 4, wherein the door engaging/disengaging device is adapted to move forward and backward by advancing and retreating the first forward/retreat gear and the second forward/retreat gear. The third rotating shaft is provided with a third gear, and the latch is provided with a third advancing/retreating gear that engages with the third gear and advances/retreats, and the latch moves as the third advancing/retreating gear advances/retreats. 6. A door engaging/disengaging device according to claim 4 or 5, characterized in that it is constructed so that it appears and disappears. The door engaging/disengaging device according to any one of claims 1 to 6, further comprising an urging member that urges the latch in the protruding direction. A door device comprising the door engaging/disengaging device according to any one of claims 1 to 7.

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