JP4088296B2 - Closed door lock device - Google Patents

Description

  The present invention relates to a closed state door lock device that is optimally used for a folding fire door provided in a passage, an entrance or the like of a building.

In general, fire doors are provided in the passages and entrances of buildings, and when a fire occurs, the fire doors are activated by signals from the building, etc., and the fire and doors close the passages and entrances to stop the fire spread. It is like that.
As shown in FIGS. 8 (a) to 8 (c), these fire doors include a main door 102 and a child door 103, and one ends of both doors 102 and 103 are connected via a door hinge portion 104. In addition, there is a folding type in which the doors 102 and 103 can be rotated in the direction of opening and closing each other by the door hinge portion 104.

The main door 102 is provided with a wall-side hinge portion 105 at the other end, and is attached to the wall portion 108 of the passage 101 via the wall-side hinge portion 105. That is, the main door 102 is in a state of being rotatable in a direction of approaching and separating from the wall portion 108 via the wall side hinge portion 105.
In order to open or close the passage 101 by the fire doors 100, the fire doors 100 are operated as follows. That is, when the passage 101 is opened from the state where the passage 101 is closed as shown in FIG. 8C, first, as shown in FIG. 8B, the main door 102 and the child door 103 are connected to the door hinge portion. They are arranged in a closed state via 104. Subsequently, as shown in FIG. 8A, with the doors 102 and 103 closed, the doors 102 and 103 are moved through the wall side hinge portion 105 in a direction in which the doors 102 and 103 approach the wall portion 108. The doors 102 and 103 are housed in a predetermined housing portion 106 provided on the wall portion 108. Thereby, both the doors 102 and 103 are efficiently accommodated in a narrow space. The passage 101 is opened by storing both the doors 102 and 103.

  On the other hand, when the passage 101 is closed from this state, the doors 102 and 103 are rotated in a direction away from the wall portion 108 through the wall side hinge portion 105 while being closed, and the doors 102 and 103 are turned from the storage portion 106. 102 and 103 are taken out. Then, with the doors 102 and 103 closed, as shown in FIG. 8B, the doors 102 and 103 are moved to a position where the main door 102 becomes perpendicular to the wall portion 108. In addition, the position of the main door 102 at this time is referred to as a passage closing position, and is indicated by a symbol P. Subsequently, as shown in FIG. 8C, the child door 103 is rotated in the opening direction via the door hinge portion 104 so that the doors 102 and 103 are opened to each other. As a result, the passage 101 is closed.

  Here, as shown in FIGS. 8A and 8B, when the main door 102 and the child door 103 are closed with each other, when rotating between the storage portion 106 and the passage closing position P, both In order to rotate the doors 102 and 103 quickly and smoothly, it is necessary to securely lock the closed state of the doors 102 and 103.

  In view of this, a closed-state door lock device that can lock both doors 102 and 103 in a closed state is known (see, for example, Patent Document 1). As shown in FIG. 9, this closed-state door lock device includes an engagement mechanism portion 110 attached to the upper end of the main door 102 and a cover attached to the upper end of the child door 103 at a position facing the engagement mechanism portion 110. Engaging member 111. The engagement mechanism portion 110 includes an engagement member 113 that is supported so as to be rotatable about the rotation shaft portion 112. The engagement member 113 includes a protrusion 116 that protrudes upward. An engaging claw 114 for engaging with an engaged hole 115 formed in the engaged member 111 is provided.

With such a configuration, when the doors 102 and 103 are closed, the engaging claws 114 are engaged with the engaged holes 115 to lock the closed state of the doors 102 and 103. When the doors 102 and 103 are rotated in the locked state and the main door 102 is disposed at the passage closing position P, the protruding portion 116 is engaged by the door frame portion 117 at the passage closing position P. The mechanism member 110 is pressed from the rear to the front, whereby the engagement member 113 rotates about the rotation shaft portion 112 so that the engagement between the engagement claw 114 and the engaged hole 115 is released. It has become.
JP-A-7-26845

However, in the closed state door lock device configured as described above, in order to obtain the rotation stroke M necessary to move the engagement claw 114 to the retracted position where it does not engage with the engaged hole 115, the rotation shaft portion There is a problem that the linear distance d ₁ from 112 to the engaging claw 114 needs to be set long, and the thickness dimension of the main body of the engaging mechanism 110 becomes large. That is, if the linear distance d ₁ is shortened, the rotation stroke M of the engagement claw 114 is shortened. Therefore, when the rotation stroke N of the protrusion 116 is kept the same, the engagement claw 114 and the engaged hole 115 are made. The engagement with can not be released. Therefore, it is necessary to set the linear distance d ₁ long as described above. In this case, not only the thickness of the door to be installed becomes large and heavy, but also the engaging claw 114 protrudes from the main door 102. As a result, the clearance between the doors must be wide. As a result, the storage section 106 that stores both the doors 102 and 103 must also be enlarged.

  The present invention has been made in view of such a problem, and it is possible to smoothly engage and release the engaging portion and the engaged portion, while reducing the thickness of the apparatus main body. It is an object of the present invention to provide a closed state door locking device that can be made small, and therefore can reduce the thickness dimension of the door and the housing necessary for installing this device.

In order to solve the above problems, the present invention provides the following means.
The invention according to claim 1 is a closed-state door locking device that locks a parent door provided on the wall of the passage so as to be opened and closed and a child door provided on the parent door so as to be opened and closed. And the engagement device is attached to either the main door or the child door and has an engagement member, and the engagement device is attached to a position facing the engagement device among the other one and has an engaged member. An engaged device, and a parent door rotation restricting device that restricts the rotation of the parent door when the parent door is arranged at a passage closing position for closing the passage. The engaging member is rotatably supported around the rotation shaft portion in the storage case, and is urged in a direction rotating in one direction by an elastic member, and at one end of the engaging member, The engaging member is moved in the other direction against the urging force of the elastic member. An action part for applying a force for rotating is provided, and an engaging part for engaging with an engaged part formed on the engaged member is provided at the other end, and the main door and the child door are connected to each other. When closing each other, the engagement portion is arranged at an engagement position where the engagement portion engages with the engaged portion by the urging force of the elastic member, and the closed state of the parent door and the child door is locked, while the action portion When the engaging member is rotated in the other direction by applying a force to the engaging portion, the engaging portion is disposed at a retracted position where the engaging portion is not engaged with the engaged portion, and the lock is released. And the distance from the rotating shaft portion to the action portion is set to be longer than the distance from the rotating shaft portion to the engaging portion, and the engaging device is attached to the main door or the child door. Sometimes, the engaging portion protrudes outward with respect to the mounting surface of the parent door or child door. In odd, the and the rotation shaft are set distance to the engaging portion, wherein the parent door rotation restricting device includes a projection mechanism portion having a protruding member attached to the parent door, said passage closed position Of the door frame part, the fitted part attached to the position facing the protruding mechanism part when the main door is arranged at the passage closed position, and the position facing the protruding mechanism part among the child doors And a release portion having a release protrusion, and a protrusion opening is formed in the storage case of the protrusion mechanism portion, and the protrusion protrudes from the storage case through the protrusion opening in the protrusion member The projecting member is supported rotatably about the first projecting rotation shaft portion so that the projecting portion protrudes and retracts from the housing case, and the projecting member is supported by the projecting elastic member. Said bump The protruding portion is biased to rotate in a direction protruding from the housing case, and a long connecting arm provided on the projecting member is inclined and extended forward in the housing case, One end of a long base arm is connected to the tip of the connecting arm so as to be rotatable about the second projecting rotary shaft, and the other end of the base arm is connected to the housing case. When the main door is arranged at the passage closing position, the protrusion fits into the fitted portion, and the main door and the child door are connected to each other. When the two are closed, the connection arm is pressed from the front to the rear of the housing case by the release protrusion, and the projecting member rotates in a direction in which the projecting portion sunk in the housing case. It is characterized by being.

In this invention, when the main door and the child door are closed to each other, the engaging portion is arranged at the engagement position by the biasing force of the elastic member, and the closed state of the parent door and the child door is locked. On the other hand, when a force is applied to the action portion and the engagement member is rotated in the other direction against the urging force of the elastic member, the engagement portion is disposed at the retracted position and the lock is released.
Here, if the distance from the rotating shaft portion to the engaging portion is simply shortened, the rotation stroke of the engaging portion is shortened. However, in the present invention, the distance from the rotating shaft portion to the engaging portion is set short. On the other hand, since the distance from the rotary shaft portion to the action portion is set longer than that distance, the rotation stroke of the engagement portion can be lengthened while keeping the rotation stroke of the action portion equal. It can be easily moved to the retracted position. Further, when the engaging device is attached to the main door or the child door, the engaging portion does not protrude outward with respect to the attachment surface of the parent door or the child door, and is in a state of being submerged in the door. .
Accordingly, the thickness dimension of the apparatus main body can be reduced while smoothly engaging and releasing the engaging portion and the engaged portion. Further, since the engaging portion does not protrude outward from the door, the clearance between the main door and the child door can be reduced.
In the present invention, when the main door is arranged at the passage closing position, the protruding portion is fitted to the fitted portion by the urging force of the protruding elastic member, and the rotation of the main door is restricted. When the main door and the child door are arranged in a closed state, the connecting arm is pressed by the release protrusion. Then, since the connecting arm is inclined and extended forward from the projecting member, in the direction in which the projecting portion sunk against the urging force of the projecting elastic member, the first projecting rotation shaft portion is the center, The protruding member rotates. At the same time, the connecting arm is pushed backward. At this time, the connecting arm and the base arm are folded around each other with the second projecting rotation shaft portion as the center, while the base arm is centered on the third projecting rotation shaft portion As it turns to the rear. Therefore, the protruding portion is separated from the fitted portion, and the restriction of the main door is released.
Here, as a mechanism for releasing the restriction of the main door, a tapered portion inclined like the connecting arm protrudes from the mounting surface of the main door, and this taper portion is pressed by the release protrusion, so that one rotating shaft It is conceivable to rotate the projecting member around the center. However, according to such a mechanism, the thickness dimension of the main door rotation restricting device cannot be reduced due to the limitation of the rotation stroke as described above.
According to the present invention, not only can the restriction and release of the rotation of the main door be easily performed, but also by using the first, second and third projecting rotary shafts to form a three-axis configuration, While accommodating the protruding member, the connecting arm, and the base arm in the housing case, the thickness dimension of the housing case can be reduced. Therefore, the thickness dimension of the main door necessary for installing the main door rotation restricting device can be reduced, and the clearance between the main door and the child door can be reduced.
According to a second aspect of the present invention, in the closed door lock device according to the first aspect, a step portion extending outward in a direction intersecting the protruding direction is formed at a midway position in the protruding direction of the release protrusion. It is characterized by being.
In this invention, when the main door and the child door are closed to each other, the tip of the release protrusion enters the housing case and presses the connecting arm. Since the stepped portion is formed on the release projection, the stepped portion and the housing case come into contact at a certain position, and the entry of the release projection is stopped. Therefore, the release protrusion acts so as not to be pushed into the housing case by a predetermined dimension or more.
Thereby, even when an excessive load is applied in the direction in which the main door and the child door are closed, it is possible to prevent the protrusion mechanism mechanism from being damaged by the release protrusion.
According to a third aspect of the present invention, in the closed door lock device according to the first or second aspect, the protruding portion includes a protruding dimension adjusting means for adjusting a length of a protruding dimension protruding from the housing case. Features.
In the present invention, the length of the projecting dimension of the projecting portion is adjusted by the projecting dimension adjusting means.
Here, if the projecting dimension of the projecting portion is set to be long, the projecting portion fits more deeply into the fitted portion, so that the holding force for maintaining the state where the rotation of the main door is restricted is increased. On the other hand, when the projecting dimension is set short, the projecting portion is shallowly fitted, so that the projecting portion is easily detached from the fitted portion, and the holding force is reduced.
According to the present invention, the holding force can be arbitrarily set, and the optimum holding force can be appropriately adjusted according to the weight of the door to be attached and the situation where the door is installed.

The invention according to claim 5 is the closed door lock device according to any one of claims 1 to 4 , wherein the engaged portion includes an engaged hole, and the engaging portion is the engaged hole. It is characterized by comprising an engaging claw that engages with.
In this invention, when the main door and the child door are closed to each other, the engaging claw engages with the engaged hole, and the closed state of the parent door and the child door is locked.
Thereby, engagement and cancellation | release with an engaging part and a to-be-engaged part can be performed easily and reliably.

The invention according to claim 6 is the closed door lock device according to any one of claims 1 to 5 , wherein the engagement device and the engaged device are attached to upper ends of the main door and the child door. An opening is formed on the upper surface of the storage case, and the engagement member includes an upper surface protrusion that protrudes from the upper surface of the storage case through the opening, and the upper surface protrusion An action part is provided.
In this invention, when the main door is rotated, the upper surface protruding portion is pressed by the door frame portion at a predetermined position. That is, the upper surface protruding portion becomes an action portion, and the engaging member is rotated in the other direction.
Thereby, the engagement portion and the engaged portion can be easily released with a simple configuration.

According to a seventh aspect of the present invention, in the closed state door lock device according to any one of the first to fifth aspects, the front end portion protrudes from the back surface of the storage case and is supported so as to be reciprocally movable in the thickness direction of the storage case. And a base end portion of the rear protrusion portion is connected to one end of the engagement member.
In the present invention, when the main door is rotated, the rear protruding portion is pressed by the door frame portion at a predetermined position. Therefore, the back protrusion is pushed into the storage case, and the base end of the back protrusion presses one end of the engagement member. That is, one end of the engaging member serves as an action portion, and the engaging member is rotated in the other direction.
Thus, the same effect as that of the above invention according to claim 6 can be obtained.

According to an eighth aspect of the present invention, in the closed state door lock device according to the seventh aspect , the rear projecting portion is formed in a long shape, and the length dimension changing means capable of changing the length dimension is provided. It is characterized by providing.

In the present invention, the length dimension of the rear protrusion is changed by the length dimension changing means. Therefore, the protrusion dimension of the back surface protrusion part which protrudes from the back surface of a storage case is changed.
Thereby, according to the thickness dimension of the door to install, the protrusion dimension of a back surface protrusion part can be adjusted to optimal length.

According to the present invention, since the thickness dimension of the apparatus main body can be reduced without causing the engaging portion to protrude from the mounting surface of the main door or the child door, the door necessary for installing the apparatus. The thickness dimension and the necessary clearance between both doors can be reduced. Therefore, the thickness dimension of the storage part that stores both doors can be reduced.
In addition, according to the present invention, not only can the rotation and rotation of the main door be easily controlled, but also a three-axis configuration using the first, second and third projecting rotary shafts. Thus, the thickness dimension of the housing case can be reduced while the projecting member, the connecting arm and the base arm are housed in the housing case. Therefore, the thickness dimension of the main door necessary for installing the main door rotation restricting device can be reduced, and the clearance between the main door and the child door can be reduced.

Example 1
Hereinafter, a closed state door lock device according to a first embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the code | symbol 1 shows a closed state door locking device.
The closed state door lock device 1 includes a hook member (an engaged member, an engaged device, a releasing portion) 6 that is fixed to the upper end portion 4b of the attachment surface 4a of the child door 4, and a door upper frame at the passage closing position P. A fixing bracket (fitted part) 9 attached to the part (door frame part) 8 and an upper end part 3b of the attachment surface 3a of the main door 3 are locked in a closed state. Furthermore, an engagement protrusion mechanism (engagement device, protrusion mechanism portion) 11 that restricts the rotation of the main door 3 is provided.

The hook member 6 includes a rectangular plate-shaped main body wall portion 6a and a protruding wall portion (release protrusion) 6b having a rectangular engaged hole (engaged portion) 12 and is formed in a substantially L shape. Yes. A long hole 6c is formed in the main body wall portion 6a, and the hook member 6 is fixed to the child door 4 with a screw or the like through the long hole 6c. Projecting wall portion 6b is formed in a convex shape in plan view, the width s ₁ of the tip side is set smaller than the width s ₂ of the base end side. A step 7 is formed at the boundary between the distal end side and the proximal end side. That is, the stepped portion 7 is formed at an intermediate position in the projecting direction of the projecting wall 6b, and extends outward in a direction orthogonal to the projecting direction. Further, the protruding wall portion 6b is in a state of protruding from the mounting surface 4a.

The engagement protrusion mechanism 11 includes a substantially box-shaped support case (storage case, storage case) 14 whose front surface is open. When the main door 3 and the child door 4 are closed to each other, the front surface of the support case 14 is provided. The tip end side of the protruding wall portion 6b is arranged in the support case 14. Here, in the thickness direction D of the support case 14, the hook member 6 side is the front, and the fixing metal 9 side is the rear. Mounting wall portions 15 extending outward in the width direction W of the support case 14 are respectively provided on the front end sides of the both side walls of the support case 14.
Long holes 15a are formed side by side in the height direction in the mounting wall portion 15 and are engaged and protruded in a state where the support case 14 is embedded in the main door 3 by screwing through the long holes 15a. The mechanism 11 is attached to the attachment surface 3a.
Further, a rectangular engagement opening (opening) 30 and a protruding opening 31 are formed on the upper surface 43 of the support case 14.

  The fixing bracket 9 is formed in a substantially rectangular shape, and a concave portion 17 is formed in the fixing bracket 9. A metal fitting opening 18 extending linearly is formed in the vicinity of the recess 17. In addition, mounting holes 19 are formed at both ends in the length direction of the fixing bracket 9, and the fixing bracket 9 is attached to the door upper frame portion 8 by screwing through the mounting holes 19. It has become.

Furthermore, in the closed door lock device 1 according to the present embodiment, the engagement member 21 formed in a bowl shape inside the support case 14 and the rotation of the main door 3 at the passage closing position P are restricted. An arm mechanism unit 22 is provided. That is, the arm mechanism 22 constitutes a main door rotation restricting device.
The engagement member 21 is supported so as to be rotatable about an engagement rotation shaft portion 24 oriented in the width direction W. The coil spring (elastic member) shown in FIG. ) 25, it is always biased clockwise with respect to FIG.

  The engaging member 21 includes a main body portion 26 and a rotating end portion 27 that is connected to one end of the main body portion 26 so as to be rotatable about a shaft portion 28. The rotation end 27 includes an engagement protrusion (upper surface protrusion) 33 that protrudes upward through the engagement opening 30, and a direction in which the engagement member 21 is urged by a coil spring (not shown). It is always biased in the opposite direction, that is, counterclockwise with respect to FIG. Then, when the rotary end 27 is rotated about the shaft portion 28, the engaging protrusion 33 protrudes and appears from the upper surface 43 of the support case 14.

  Further, in the natural state, the rotation end portion 27 is in a state in which the rotation is restricted at a position where the stopper portion 34 is in contact with the main body portion 26, that is, at a position where the engagement protrusion portion 33 faces just upward. . As a result, when the engagement protrusion 33 is pressed forward from the rear, the rotation of the rotation end 27 is restricted, and the engagement member 21 resists the urging force of the coil spring 25 and the engagement rotation shaft portion. 2 is rotated counterclockwise with respect to FIG. On the other hand, when the engaging protrusion 33 is pressed in the backward direction from the front, the rotating end 27 is rotated clockwise with respect to FIG. That is, the engaging protrusion 33 functions as an action portion.

Further, the other end of the engaging member 21 is provided with an engaging claw (engaging portion) 36 directed upward. When the main door 3 and the child door 4 are closed, the engaging claws 36 are arranged at the engaging position K shown in FIG. ing. On the other hand, when the engagement protrusion 33 is pressed forward from the rear and the engagement member 21 is rotated counterclockwise, the engagement claw 36 does not engage with the engaged hole 12 (FIG. 5D). Is arranged at the retracted position L shown in FIG.
In the present embodiment, as shown in FIG. 2, the engagement claw 36 is arranged in the support case 14 so as not to protrude forward in the thickness direction D from the support case 14. A linear distance d ₁ to the engaging rotary shaft portion 24 is set. Further, the engaging rotation shaft portion 24 is provided at the substantially center of the support case 14 in the height direction, and the linear distance d ₂ from the engaging protrusion 33 to the engaging rotation shaft portion 24 is greater than the linear distance d ₁ . Is also set longer.

Further, as shown in FIG. 1, the arm mechanism unit 22 includes a projecting and rotating member (projecting member) 38, and the projecting and rotating member 38 is a first facing the width direction W of the support case 14. It is supported so that it can rotate around the projecting rotary shaft 40. Further, the projecting rotation member 38 is formed with a projecting portion 46 projecting upward through the projecting opening 31 and a tapered portion 58 inclined forward and obliquely downward. Then, when the projecting and rotating member 38 is rotated about the first projecting rotating shaft portion 40, the projecting portion 46 protrudes and appears from the upper surface 43 of the support case 14. The protrusion 46 is adapted to fit into the recess 17 when the main door 3 is arranged at the passage closing position P.
Furthermore, the base end portion of the connecting arm 49 extending in a plate shape is connected to the projecting rotation member 38 by the connecting shaft portion 48, and the connecting arm 49 is rotatable about the connecting shaft portion 48. It has become.

  As shown in FIG. 3, the connecting arm 49 has a tip directed toward the front side in the thickness direction D and extending obliquely downward. One end of a base arm 50 extending in a plate shape is connected to the tip of the connecting arm 49 by a second projecting rotary shaft portion 41, and the other end of the base arm 50 is connected to an engaging rotary shaft portion. 24, and the base arm 50 is supported by the engaging rotary shaft 24. As a result, the base arm 50 rotates about the engaging rotation shaft portion 24 and further opens and closes with the connecting arm 49 about the second protruding rotation shaft portion 41. It is designed to rotate. That is, the engaging rotation shaft portion 24 serves as both the rotation shaft portion and the third protruding rotation shaft portion.

  These arm mechanism portions 22 are arranged in the support case 14, and the connecting arm 49 is positioned forward by a coil spring (projecting elastic member) 52, that is, the connecting shaft portion 48 is centered. As shown in FIG. 3, it is always biased clockwise with respect to FIG. Then, the urging force reaches the projecting and rotating member 38 via the connecting arm 49, and the projecting and rotating member 38 is constantly urged clockwise around the first projecting rotating shaft 40. ing. Thereby, the protrusion part 46 protrudes from the upper surface 43 of the support case 14 in a natural state.

  In this embodiment, an adjustment screw 54 directed in the thickness direction D is attached to the front of the projecting rotation member 38 via a lock nut 55. As shown in FIG. 4, the adjustment screw 54 is rotated by a flat-blade screwdriver 57, thereby reciprocating in the thickness direction D. Then, when the adjustment screw 54 is tightened and moved backward, as shown in FIG. 3, the taper portion 58 is pressed backward by the adjustment screw 54, whereby the protruding rotation member 38 is counterclockwise with respect to FIG. As the projecting portion 46 is gradually submerged in the support case 14, the projecting dimension of the projecting portion 46 from the upper surface 43 of the support case 14 is shortened. On the other hand, when the adjustment screw 54 is loosened, the projecting rotation member 38 is rotated clockwise with respect to FIG. 3 by receiving the biasing force of the coil spring 52, and the projecting dimension from the upper surface 43 of the projecting portion 46 becomes longer. It has become. That is, the adjustment screw 54 and the lock nut 55 function as a protrusion dimension adjusting unit that adjusts the length of the protrusion dimension of the protrusion 46 from the upper surface 43 of the support case 14.

Next, the operation of the closed door lock device 1 according to the present embodiment will be described in accordance with the opening / closing operation of the two-fold door. Initially, as shown in FIG. 5A, the engaging claw 36 is disposed at the engaging position K, and the main door 3 and the child door 4 are stored in the storage portion 60 while being locked in the closed state. It is assumed that the passage 61 is open.
To close the passage from this state, the doors 3 and 4 are pulled out from the storage portion 60 as described above. Then, as shown in FIG. 5 (b), the rotating end 27 rotates counterclockwise with respect to FIG. 5 (b) by the biasing force of a coil spring (not shown), and the engaging protrusion 33 is moved upward. Protrusively toward. At this time, since the doors 3 and 4 are locked in the closed state, they can be quickly and smoothly rotated.

Then, when both the doors 3 and 4 are rotated toward the passage closing position P, as shown in FIG. 5C, the engaging protrusion 33 comes into contact with the door upper frame portion 8 at the passage closing position P. By further rotating, the engaging protrusion 33 is pressed from the rear to the front of the support case 14. That is, the contact position R which contacts the door upper frame part 8 functions as an action part among the protrusion parts 33 for engagement.
As a result, the engaging member 21 rotates counterclockwise with respect to the urging force of the coil spring 25 with respect to FIG. 5C, and the engaging projection 33 is submerged inside the support case 14. . And as shown in FIG.5 (d), the main door 3 is arrange | positioned in the channel | path closed position P by the rotation being stopped by the door stop part 63. As shown in FIG. At this time, the front end of the engaging protrusion 33 is fitted into the metal opening 18 and the engaging claw 36 is disposed at the retracted position L, whereby the engaging claw 36 and the engaged hole 12 are engaged. The lock of the closed state of both doors 3 and 4 is also released.

Therefore, when the child door 4 is opened with respect to the parent door 3 in order to close the passage 61, the protruding wall portion 6 b moves away from the engaging protruding mechanism 11. Accordingly, the entire arm mechanism portion 22 swells forward in the thickness direction D in the support case 14. That is, since the connecting arm 49 is urged by the coil spring 52, the connecting arm 49 rotates about the connecting shaft portion 48 in the clockwise direction with respect to FIG. Also, the connecting arm 49 and the base arm 50 are pivoted about the second projecting rotary shaft 41 in the direction of opening with respect to each other. At the same time, the projecting and rotating member 38 also rotates in the clockwise direction around the first projecting rotating shaft 40. Therefore, the protrusion 46 protrudes from the upper surface 43 of the support case 14 through the protrusion opening 31, and the protrusion 46 fits into the recess 17. As a result, the rotation of the main door 3 is restricted at the passage closing position P.
In this state, the child door 4 is further rotated so that the doors 3 and 4 are fixed in an unfolded state by a fixing device (not shown) at a position flush with the parent door 3, and the passage 61 is closed. .

Next, an operation when the passage 61 is opened from the closed state as described above will be described.
First, the unfolded state of the doors 3 and 4 by the fixing device is released, and the child door 4 is rotated so that the doors 3 and 4 are closed to each other. Then, as shown in FIG. 5 (d), the distal end side of the protruding wall portion 6 b enters the support case 14 and contacts the connecting arm 49. Then, the connecting arm 49 is pushed from the front toward the rear by the protruding wall portion 6b. Since the distal end of the connecting arm 49 is inclined toward the front side, a force acts downward on the connecting arm 49 by the pressing of the protruding wall portion 6b. Therefore, contrary to the above, the entire arm mechanism portion 22 is folded backward in the support case 14. That is, the connecting arm 49 rotates counterclockwise with respect to the connecting shaft portion 48 with respect to FIG. 5D, and the base arm 50 also rotates counterclockwise about the engaging rotating shaft portion 24. The connecting arm 49 and the base arm 50 are rotated in a direction in which the connecting arm 49 and the base arm 50 are closed with respect to the second projecting rotation shaft 41. At the same time, the projecting and rotating member 38 also rotates counterclockwise about the first projecting rotating shaft 40. Therefore, the protrusion 46 is immersed in the support case 14.

Thereby, the protrusion 46 does not fit into the recess 17 and the restriction on the rotation of the main door 3 is released. That is, the hook member 6 functions not only as an engaged member and an engaged device, but also as a release portion, and the protruding wall portion 6b functions as a release protrusion.
Further, when the protruding wall portion 6b is pushed into the support case 14, the stepped portion 7 contacts the support case 14 at a position where the protruding portion 46 is submerged in the support case 14, and the protruding wall portion 6b has an inside of the support case 14. The entry into is stopped there.

  After the restriction of the main door 3 is released as described above, the two doors 3 and 4 are rotated toward the storage portion 60 while the two doors 3 and 4 are closed to each other. Move away from the passage closing position P. Then, as shown in FIG.5 (c), the engagement protrusion mechanism 11 is released | separated from the door upper frame part 8, and the upper direction of the support case 14 is open | released. Therefore, due to the urging force of the coil spring 25, the engaging member 21 is rotated clockwise with respect to FIG. Then, as shown in FIG. 5B, the engaging protrusion 33 protrudes from the upper surface 43 of the support case 14 through the engaging opening 30, and the engaging claw 36 is disposed at the engaging position K. , Engage with the engaged hole 12. Thereby, the closed state of both doors 3 and 4 is locked. Further, in this state, as shown in FIG. 5A, when the doors 3 and 4 are pushed into the storage portion 60, the engagement protrusion 33 is pushed from the front to the rear by the door upper frame of the storage portion 60. As a result, the rotating end 27 rotates clockwise with respect to FIG. 5A, and the engaging projection 33 is submerged in the support case 14. Thereby, both the doors 3 and 4 are accommodated in the accommodating part 60, and the channel | path 61 is open | released.

Here, when the linear distance d ₁ from the engaging claw 36 to the engaging rotating shaft portion 24 is shortened, the rotating stroke M of the engaging claw 36 is shortened. Therefore, the rotating stroke N of the engaging protruding portion 33 is maintained. If this is left, the engagement claw 36 cannot be moved from the engagement position K to the retracted position L.
In the closed door lock device 1 according to the present embodiment, the linear distance d ₂ from the engaging protrusion 33, that is, the contact position R as the action part to the engaging rotary shaft 24 is set longer than the linear distance d _1. Thus, the rotation stroke M of the engagement claw 36 is lengthened while the rotation stroke N of the engagement protrusion 33 is maintained. Therefore, even if the linear distance d ₁ from the engaging claw 36 to the engaging rotary shaft portion 24 is shortened, the engaging claw 36 can easily move from the engaging position K to the retracted position L.
Further, the engaging claw 36 is disposed in the support case 14, and the engagement protrusion mechanism 11 is attached to the attachment surface 3 a in a state where the support case 14 is embedded in the main door 3. When attached to the attachment surface 3a of the door 3, the engaging claw 36 does not protrude outward from the attachment surface 3a.

In the closed door lock device 1 according to the present embodiment, the limit holding force for restricting the rotation of the main door 3 when the main door 3 is arranged at the passage closing position P is arbitrarily set as follows. Can be set.
That is, the holding force is determined by the protruding dimension from the upper surface 43 of the protruding portion 46. That is, the longer the projecting dimension of the projecting portion 46, the larger the holding force, and the smaller the projecting dimension, the smaller the retaining force. Therefore, as shown in FIG. 4, the adjustment screw 54 is moved backward in the thickness direction D by tightening the adjustment screw 54 with a minus driver 57. Then, the adjusting screw 54 presses the tapered portion 58 from the front toward the rear. Since the taper portion 58 is inclined, the projecting rotation member 38 is pushed down and rotates clockwise with respect to FIG. 4 about the first projecting rotation shaft portion 40. Therefore, as shown in FIG. 3, the protrusion 46 is immersed in the support case 14, and the protrusion dimension of the protrusion 46 from the upper surface 43 of the support case 14 is shortened.

On the other hand, when the adjustment screw 54 is loosened by the minus driver 57, the adjustment screw 54 moves forward, whereby the projecting rotation member 38 is pushed up by the biasing force of the coil spring 52, and the first projecting rotating shaft portion 40 is moved. Rotate counterclockwise about the center. Therefore, the protruding portion 46 protrudes from the upper surface 43 of the support case 14, and the protruding dimension from the upper surface 43 of the support case 14 becomes longer.
Thereby, the protrusion dimension of the protrusion part 46 is set, and holding force is set arbitrarily.

As described above, even if the linear distance d ₁ from the engaging claw 36 to the engaging rotary shaft portion 24 is shortened, the contact position R of the engaging protrusion 33 to the engaging rotary shaft portion 24 is shorter than the linear distance d _1. By setting the linear distance d ₂ to be long, the rotation stroke M of the engagement claw 36 can be increased while maintaining the rotation stroke N of the engagement protrusion 33. Therefore, the engaging claw 36 is easily moved from the engaging position K to the retracted position L, the engagement claw 36 and the engaged hole 12 are smoothly engaged and released, and the thickness dimension of the support case 14 is increased. It can be set smaller. Therefore, the thickness dimension of the main door 3 can also be made small, and manufacture and handling of the main door 3 can be made easy.

  Further, since the engaging claw 36 is disposed in the support case 14, when the engaging protrusion mechanism 11 is attached to the attachment surface 3a of the main door 3, the engagement claw 36 is moved outward from the attachment surface 3a. Can be prevented from protruding. Therefore, the clearance between the doors when the parent door 3 and the child door 4 are closed to each other can be reduced, and the thickness dimension of the storage portion 60 can also be set to be small. Furthermore, by reducing the thickness dimension of the main door 3 and the child door 4 as described above and also reducing the clearance between the doors, the thickness dimension of the storage portion 60 can be further reduced.

For example, conventionally, the minimum thickness dimension of the main door 3 and the child door 4 is 45 mm, the dimension between the doors is 40 mm, and the total thickness dimension when the doors 3 and 4 are closed to each other is as follows:
(45mm × 2) + 40mm = 130mm
Was the limit.
In this example, the minimum thickness dimension of both doors 3 and 4 is 40 mm, the dimension between the doors is 15 mm, and the total thickness dimension is
(40mm × 2) + 15mm = 95mm
And 35 mm smaller than before.

Further, the arm mechanism portion 22 has a four-axis configuration using the first and second protruding rotating shaft portions 40 and 41, the engaging rotating shaft portion 24, and the connecting shaft portion 48. While the member 38, the connecting arm 49, and the base arm 50 are housed in the support case 14, the thickness dimension of the support case 14 can be reduced. Therefore, the thickness dimension of the main door 3 can be reduced.
Further, since the protruding wall portion 6b is provided with a stepped portion 7 and the protruding wall portion 6b is prevented from entering the support case 14 beyond a predetermined dimension, the main door 3 and the child door 4 are excessively closed in the direction of closing each other. Even when a heavy load is applied, the protruding wall portion 6b prevents the arm mechanism portion 22 from being damaged.
Further, since the width s ₁ of the distal end of the protruding wall portion 6b is set smaller than the base side, when closing each other and parent door 3 and Kotobira 4, the protruding wall portion 6b in the support case 14 Can be easily put into. Moreover, it can prevent that the front end side of the protrusion wall part 6b contacts the support case 14, and can protect the support case 14. FIG.

  Further, the rotation of the main door 3 is restricted when the main door 3 is disposed at the passage closing position P by moving the adjustment screw 54 in the thickness direction D to adjust the length of the protrusion 46. The limit holding force to be set can be arbitrarily set, and the optimum holding force can be appropriately adjusted according to the weight of the door to be attached and the situation where the door is installed. For example, when the passage is closed by the main door 3 and the child door 4 and both the doors 3 and 4 are in the unfolded state, when a predetermined load or more is applied in the direction in which the doors 3 and 4 are closed, A fixing device that fixes not only the protrusion 46 and the recess 17 but also the doors 3 and 4 in an unfolded state by adjusting the holding force so as to quickly release the fitting between the protrusion 46 and the recess 17. It is possible to avoid applying an excessive load to the components, and it is possible to improve the durability of these members and devices. In addition, safety in an emergency can be ensured smoothly.

Further, since the linear distance d ₂ from the contact position R of the engagement protrusion 33 to the engagement rotation shaft portion 24 is set long, the rotation when the engagement member 21 is rotated against the urging force of the coil spring 25. The moment can be increased, and the engaging member 21 can be rotated with less force than in the past. Therefore, the engagement and release of the engagement claw 36 and the engaged hole 12 can be performed more smoothly.

Furthermore, since the linear distance d ₂ is set to be long, the engaging rotation shaft portion 24 is provided at substantially the center in the height direction of the support case 14, and accordingly, the engagement claw 36 and the protruding wall portion 6 b are installed. The position is lower than before. By the way, the child door 4 may be further provided with a three-fold door provided with a grandchild door that can be opened and closed. In the case of such a three-fold door or the like, the engagement protrusion mechanism 11 is attached to the attachment surface 3a of the main door 3 and the attachment surface 4a of the child door 4, and the turning surface of the grandchild door (the attachment surface 3a, 4a), the hook member 6 facing the engaging projection mechanism 11 of the child door 4 is attached to the surface of the child door 4, and the engaging projection mechanism of the parent door 3 is mounted on the surface opposite to the turning surface of the grandchild door. 11 is attached to the hook member 6 opposite to the head 11.
Here, conventionally, when the hook member 6 is attached, it is necessary to provide the hook member 6 on the upper end of the child door 4 in accordance with the height of the engaging claw 36. Therefore, if the grandchild door is arranged in the unfolded state, the hook member 6 attached to the surface opposite to the rotating surface comes into contact with the door stop portion 63 at the passage closing position P. Could not be installed.
In the present embodiment, as described above, the installation position of the engagement claw 36 is lower than the conventional position in accordance with the height of the engagement rotation shaft portion 24. Therefore, the hook member 6 is attached to a position lower than the upper end of the grandchild door in accordance with the engaging claw 36, so that the hook member 6 is prevented from coming into contact with the door stop portion 63 even when the grandchild door is placed in the unfolded state. can do. Therefore, even if it is composed of a three-fold door or more, it is possible to attach all the same standardized members and mechanisms.

(Example 2)
6 (a) and 6 (b) show a second embodiment of the present invention.
6 (a) and 6 (b), the same components as those shown in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted.
This embodiment and the first embodiment have the same basic configuration and are different in the following points. That is, the engagement protrusion mechanism 11 in the present embodiment is not provided with the rotating end portion 27 and the engagement protrusion 33 in the first embodiment, but instead, as shown in FIG. An opening hole 65 is formed in the back surface 73 of the support case 14, and a protruding bar (back surface protruding portion) 66 extending in a bar shape through the opening hole 65 is supported so as to be reciprocally movable in the thickness direction D. . A rubber pad 69 is attached to the distal end portion 67 of the protruding rod 66, and a connecting member 70 connected to one end of the engaging member 21 is provided at the base end portion 68. That is, the connection position Q that is one end of the engagement member 21 and that is connected to the connection member 70 functions as an action portion. The rubber pad 69 is used to prevent the protruding bar 66 from entering the door stopper 63 by increasing the contact area between the protruding bar 66 and the door stopper 63, thereby preventing smoke. Is to improve.

  Under such a configuration, when the main door 3 is arranged at the passage closing position P, as shown in FIG. 6B, the rubber pad 69 provided on the protruding bar 66 contacts the door stop 63, and the protruding bar 66 Is pressed from the rear to the front. Therefore, the protruding rod 66 moves forward and is pushed into the support case 14. Then, one end of the engaging member 21 is pressed forward by the base end portion 68 of the protruding rod 66 via the connecting member 70, and as a result, the engaging member 21 is centered on the engaging rotary shaft portion 24 as shown in FIG. It rotates counterclockwise with respect to (b). Thereby, the engaging claw 36 moves to the retracted position L, and the engagement between the engaging claw 36 and the engaged hole 12 is released.

On the other hand, when the main door 3 is rotated in a direction away from the passage closing position P with the doors 3 and 4 being closed, as shown in FIG. The member 21 rotates clockwise with respect to FIG. 6A, the engaging claw 36 is disposed at the engaging position K, and the protruding bar 66 is pushed out of the support case 14 from the back surface 73. Protruding. Thereby, the closed state of both doors 3 and 4 is locked.
In addition, since the other effect | action accompanying opening and closing of both the doors 3 and 4 is the same as that of the said Example, it abbreviate | omits. Further, in this embodiment, since the engaging protrusion 33 is not provided, it goes without saying that the metal fitting opening 18 and the engaging opening 30 are not formed.

  From the above, not only can the same effect as described above be achieved, but also the metal opening 18 of the fixing metal 9 can be dispensed with. Therefore, the number of processes can be reduced and the cost can be suppressed.

(Example 3)
FIGS. 7A and 7B show a third embodiment of the present invention.
7A and 7B, the same components as those shown in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted.
This embodiment and the second embodiment have the same basic configuration, and are different in the following points. That is, as shown in FIG. 7A, the protruding rod 66 in this embodiment includes a protruding rod main body 66a extending in a bar shape and a connecting rod 66b connected to the protruding rod main body 66. A rubber pad 69 is attached to one end of the protruding rod body 66a, and a male screw portion 75 is formed at the other end. The connecting rod 66b is a rod-like member having the same diameter as the protruding rod main body 66a. A screw hole 76 is formed at one end, and a male screw portion 75 is formed at the other end.

Under such a configuration, the protruding rod body 66a and the connecting rod 66b are concentric by screwing the male thread portion 75 at the other end of the protruding rod body 66a into the screw hole 76 at one end of the connecting rod 66b. Connected to Further, the protruding rod 66 and the connecting member 70 are connected by screwing the male screw portion 75 at the other end of the connecting rod 66 b into the screw hole 76 formed in the connecting member 70.
In addition, the protruding rod body 66a and the connecting rod 66b are prepared in a plurality of types having different lengths, and the number and length of the protruding rod body 66a and the connecting rod 66b can be selectively combined. It is like that. For example, as shown in FIG. 7B, the length dimension of the protruding bar 66 can be shortened by selecting and connecting the protruding bar body 66a and the connecting bar 66b having a short length. That is, the protruding rod body 66a and the connecting rod 66b function as length dimension changing means.

As described above, the length of the protruding rod 66 can be adjusted by selectively combining the number and length of the protruding rod main body 66a and the connecting rod 66b, and the protruding rod can be adjusted according to the thickness dimension of the door to be installed. The protruding dimension of the bar 66 can be adjusted to an optimum length.
In the present embodiment, one connecting rod 66b is connected. However, the present invention is not limited to this, and the number of connections can be changed as appropriate, and the protruding rod main body 66a can be mounted without providing the connecting rod 66b. The connecting member 70 may be directly connected.
Further, although the protruding rod body 66a and the connecting rod 66b are connected by the male screw portion 75 and the screw hole 76, the connecting structure is not limited to this, and the connecting structure can be changed as appropriate.

  In the first to third embodiments, the arm mechanism unit 22 is provided. However, the present invention is not limited to this, and the arm mechanism unit 22 may not be provided. Accordingly, the projection opening 31 and the recess 17 may not be provided accordingly. In particular, if the arm mechanism portion 22 is not provided in the second embodiment, the fixture 9 itself is not necessary. However, as described above, it is preferable that the arm mechanism portion 22 is provided in that the main door 3 can be restricted at the passage closing position P. Moreover, you may make these arm mechanism parts 22 etc. independent as a separate main door rotation control apparatus. However, it is needless to say that the closed door lock device is preferable because the number of parts can be reduced and the cost can be reduced.

In addition, although the arm mechanism portion 22 has a four-axis configuration, the present invention is not limited to this and can be increased to five or six axes. Further, the projecting and rotating member 38 and the connecting arm 49 may be fixed without providing the connecting shaft portion 48 and configured with three axes. That is, it is good also as a 3 axis | shaft structure of the 1st and 2nd rotating shaft part 40,41 for protrusion, and the rotating shaft part 24 for engagement.
Furthermore, there is no need to adjust the protrusion dimension of the protrusion 46. However, it is desirable to provide this as described above. Further, the protruding dimension adjusting means may not be the adjusting screw 54 or the lock nut 55.
Note that the technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

It is a perspective view showing the 1st example of the closed state door lock device concerning the present invention. It is the sectional side view which looked at the closed state door locking device in the example from the engagement member side. It is the side perspective view which looked at the closed state door locking device in the example from the arm mechanism part side. In FIG. 3, it is explanatory drawing which shows a mode that the protrusion dimension of a protrusion part is adjusted. It is a figure which shows a mode that the closed state door locking device when the main door and the child door were opened and closed was seen from the engagement member side, (a) shows a mode that both doors were accommodated in the accommodating part. Explanatory drawing, (b) is explanatory drawing which shows a mode that both doors are outside a storage part, (c) is explanatory drawing which shows a mode that a main door was distribute | arranged in the vicinity of a passage closing position, (d) is a main door It is explanatory drawing which shows a mode that was arrange | positioned in the channel | path closed position and the child door left | separated with respect to the parent door. It is a figure which shows 2nd Example of the closed door lock apparatus which concerns on this invention, Comprising: (a) is a side perspective view which shows a mode that both doors are locked in the state which mutually closed, (b) ) Is a side perspective view showing the state where the main door is disposed at the passage closing position and the child door is separated from the main door from the engagement member side. It is a figure which shows the principal part of 3rd Example of the closed door lock apparatus which concerns on this invention, Comprising: (a) is explanatory drawing which shows a mode that a long protrusion rod main body and a connection rod are connected, (b). [FIG. 4] It is explanatory drawing which shows a mode that a short protrusion rod main body and a connection rod are connected. It is a figure which shows the opening / closing operation | movement of the conventional double fold door, Comprising: (a) is explanatory drawing which shows a mode that the double fold door was accommodated and the channel | path was opened, (b) has taken out the double fold door from the accommodating part. Explanatory drawing which shows a mode that the main door has been arrange | positioned in the channel | path closing position, (c) is explanatory drawing which shows a mode that the two-folded door was mutually expanded and the channel | path was closed. It is side surface perspective drawing which shows a mode that the conventional closed state door locking device was seen from the engagement member side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Close state door locking device 3,102 Parent door 3a, 4a Mounting surface 3b, 4b Upper end part 4,103 Child door 6 Hook member (engaged member, engaged device, release part)
6b Protruding wall (release protrusion)
7 Step part 8 Door upper frame part (door frame part)
9 Fixing bracket (fitting part)
11 Engagement protrusion mechanism (engagement device, protrusion mechanism part)
12 engaged hole (engaged part)
14 Support case (storage case, storage case)
21 engaging member 22 arm mechanism (master door rotation restricting device)
24 Rotating shaft portion for engagement (rotating shaft portion, third projecting rotating shaft portion)
25 Coil spring (elastic member)
30 Opening for engagement (opening)
31 Protrusion opening 33 Engagement protrusion (upper surface protrusion)
36 engaging claw (engaging part)
38 Projection rotation member (projection member)
40 First rotating shaft 41 Second protruding shaft 43 Upper surface 46 Projecting portion 49 Connecting arm 50 Base arm 52 Coil spring (projecting elastic member)
54 Adjustment screw (Projection dimension adjustment means)
55 Lock nut (Projection dimension adjusting means)
66 Protruding rod (back protrusion)
66a Protruding rod body (length dimension changing means)
66b Connecting rod (length dimension changing means)
67 Front end portion 68 Base end portion 73 Back surface D Thickness direction K Engagement position L Retraction position P Passage closing position Q Connection position (action portion)
R Contact position (action part)
s ₁ , s ₂ width 61, 101 passage 108 wall

Claims (8)

In the closed door lock device that locks the main door provided to be openable and closable on the wall of the passage and the child door provided to be openable and closable to the main door in a closed state,
An engagement device attached to either one of the main door or the child door and having an engagement member, and an engaged device having an engagement member attached to a position opposite to the engagement device of either one of the other doors And a main door rotation restricting device that restricts the rotation of the main door when the main door is arranged at a passage closing position for closing the passage .
The engaging member is supported so as to be rotatable around the rotation shaft portion in the storage case, and is biased in a direction rotating in one direction by the elastic member,
One end of the engaging member is provided with an action portion on which a force for rotating the engaging member in the other direction against the urging force of the elastic member is provided, and the other end is provided with the engaged member. An engaging portion that engages with the formed engaged portion is provided,
When the main door and the child door are closed to each other, the engagement portion is arranged at an engagement position where the engagement portion engages with the engaged portion by the biasing force of the elastic member, and the parent door and the child door are closed. When the engagement member is rotated in the other direction by applying a force to the action portion, the engagement portion is disposed at a retracted position where the engagement portion is not engaged with the engaged portion. Configured to be released,
The distance from the rotating shaft portion to the action portion is set to be longer than the distance from the rotating shaft portion to the engaging portion,
When the engagement device is attached to the main door or the child door, the engagement from the rotating shaft portion so that the engagement portion does not protrude outward with respect to the attachment surface of the parent door or the child door. The distance to the part is set ,
The main door rotation restricting device includes a protrusion mechanism portion attached to the main door and having a protrusion member, and a door frame portion at the passage closing position, and the protrusion when the main door is arranged at the passage closing position. A fitted portion that is attached to a position facing the mechanism portion, and a release portion that is attached to a position of the child door facing the protruding mechanism portion and has a release protrusion,
A projecting opening is formed in the housing case of the projecting mechanism,
The projecting member is provided with a projecting portion projecting from the housing case through the projecting opening,
The projecting member is supported so as to be rotatable about a first projecting rotating shaft so that the projecting part protrudes and retracts from the housing case, and the projecting member is supported by the projecting elastic member. It is biased to rotate in the direction protruding from the storage case,
A long connecting arm provided on the protruding member is inclined and extended forward in the housing case,
One end of an elongated base arm is connected to the distal end of the connecting arm so as to be rotatable about a second projecting rotary shaft, and the other end of the base arm is connected to the housing case. 3 is connected so as to be rotatable around the projecting rotary shaft portion,
When the main door is arranged at the passage closing position, the protruding portion is fitted to the fitted portion,
When the main door and the child door are closed to each other, the connection protrusion is pressed from the front to the rear of the housing case by the release protrusion, and the projecting member sinks the projecting portion in the housing case. A closed state door locking device, characterized in that it is configured to rotate in a direction . Wherein the direction of the middle position projecting the release protrusion, closed door locking device according to claim 1, wherein a step portion extending outward in the direction orthogonal to the direction in which the projecting is formed. Closed door lock device according to claim 1 or claim 2, characterized in that it comprises a projecting dimension adjusting means for adjusting the length of the projecting dimension of the projecting portion projects from the housing case.   The storage case also serves as a storage case for the protruding mechanism;
  The engaging device is attached to one of the main door and the child door, and the other member of the main door and the child door is the hook member that functions as the engaged member, the engaged device, and the release portion. The closed door lock device according to any one of claims 1 to 3, wherein the door lock device is attached. The closed portion according to any one of claims 1 to 4, wherein the engaged portion includes an engaged hole, and the engaging portion includes an engaging claw that engages with the engaged hole. State door lock device. The engagement device and the engaged device are adapted to be attached to upper ends of the main door and the child door,
An opening is formed on the upper surface of the storage case,
The engagement member includes an upper surface protrusion that protrudes from the upper surface of the storage case through the opening,
The closed door lock device according to any one of claims 1 to 5 , wherein the action portion is provided on the upper surface protruding portion. The front end portion protrudes from the back surface of the storage case, and includes a back surface protrusion portion supported so as to be reciprocally movable in the thickness direction of the storage case.
The closed door lock device according to any one of claims 1 to 5 , wherein a base end portion of the rear protruding portion is connected to one end of the engaging member. 8. The closed state door lock device according to claim 7 , wherein the rear protruding portion is formed in a long shape and includes a length dimension changing means capable of changing the length dimension thereof.

Images