JP2742033B2 - Key device for door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates mainly to a double door type opening / closing door key device mounted on a cupboard, a bookcase or the like. An engaging portion that is detachably engageable with one of the doors, and with an engaging portion that engages with an engaged portion provided on the other opening / closing door and holds the two opening / closing doors in a closed posture. The present invention relates to a key device for an opening / closing door provided with a key mechanism having an operating shaft for disengaging the engaging portion by an operation from the front side of the opening / closing door.

[0002]

2. Description of the Related Art In a conventional key device for an opening / closing door, a magnet and a magnetic material such as an iron plate which is attracted to the magnet are provided at portions of the other opening / closing door and a door mounting / fixing portion which are opposed to each other in the door opening / closing direction. A lock pin which is provided on the other opening / closing door and which is detachably engageable with a locking hole which is formed in the door mounting / fixing portion and which is opened in the vertical direction, and the lock pin is positioned at an engagement position along the vertical direction. A coil spring for biasing the movement;
An operation knob for manual operation of operating the lock pin to the disengaged position against the elastic urging force of the coil spring, and a locking portion for locking and holding the operation knob of the lock pin operated to the disengaged position And a lock mechanism having the following.

[0003]

In the conventional key device of the former type, the other opening / closing door is operated to open by opening the other opening / closing door in order to attract and hold the other opening / closing door in a closed position by the magnetic force of a magnet provided on the door mounting / fixing portion. At this time, it is only necessary to perform the opening operation against the magnetic force of the magnet, but if a large external force in the opening direction acts on the inner surface side of the other opening / closing door by hitting a collapsed object due to an earthquake or the like, the other The opening / closing door of the opening / closing door easily opens against the magnetic force of the magnet, so that the engagement margin between the engaged portion of the other opening / closing door and the engaging portion of the key mechanism provided on one of the opening / closing doors becomes gradually shallower. Finally, the engagement between the two is released, and as a result, there is a problem that the stored items fall and are scattered around.

In the latter door lock device, even if a large external force in the opening direction acts on the inner surface of the other door due to a fall of a stored item or the like, the locking mechanism provided on the door is locked. Since the pin is engaged with the locking hole of the door fixing portion from above and below, and the engaged state is held by the elastic biasing force of the coil spring, the other door is opened by the external force. The opening and closing movement of both doors is ensured without maintaining the engaged state of the engaged part of the other door and the engaging part of the key mechanism provided on one of the doors without swinging. Can be held. On the other hand, when opening both doors, first, the operating shaft of the key mechanism provided on the other door is operated to engage the engaging part which has been engaged with the engaged part of the other door. After the release operation, the lock pin of the lock mechanism provided on the other opening and closing door must be disengaged against the elastic biasing force of the coil spring, so that the opening and closing operation is complicated and troublesome. .

The present invention has been made in view of the above-mentioned circumstances, and has as its object to provide a large external force in the opening direction due to, for example, a stored object collapsed due to an earthquake or the like hitting the inner surface of the other door. However, the opening operation of the doors due to the external force can be reliably prevented, and the opening and closing operation of the doors can be performed quickly and easily.

[0006]

A first feature of a key device according to the present invention for achieving the above object is that a key device includes a pair of doors which are swingably opened and closed on a door mounting fixed portion.
An engagement portion for engaging one of the open / close doors with a first engaged portion provided on the other open / close door to hold the two open / close doors in a closed position;
A key mechanism having an operation shaft for disengaging the engaging portion by an operation from the front side of one of the opening and closing doors is provided. (2) A lock member that fixes the open / close door in a closed position by engaging with the engaged portion, a return biasing body that returns and biases the lock member to the disengaged position, and a closed position of the other open / close door. When one of the doors is pivoted to the closed position in the state described above, the lock member is engaged and fixed against the return biasing force of the return biasing body with the contact with the one door. A key device for an opening / closing door provided with a door closing mechanism having an operating member for performing a lock operation in a position , wherein the door closing mechanism is
To construct, the casing attached to the other door
A shaft of a pin-shaped second engaged portion on the door mounting / fixing portion side;
Hook-shaped locking part that can swing around the vertical axis parallel to the core
Material and a horizontal axis perpendicular to or substantially perpendicular to the vertical axis
A pivotable operating member is pivoted around, and
The operating member is provided with one of the opening and closing doors that is swingably operated to the closed position.
Engages the lock member when pressed by the contact of
Swinging from the release position to the engagement fixed position for engaging the second engaged portion
In order to move the lock member and the operating member,
Interlocking means for moving the return urging body,
The point is that it is interposed between the member and the casing .

According to a second characteristic configuration of the key device according to the present invention, in addition to the first characteristic configuration of the key device, the lock member protrudes toward the longitudinal axis from the engagement surface of the lock member. An elastic holding body which is elastically deformed by being brought into contact with the second engaged portion is integrally formed.

According to a third characteristic configuration of the key device according to the present invention, in addition to the first or second characteristic configuration of the key device, the interlocking means includes an interlocking projection provided on the operating member and the interlocking projection being engaged. A first swing regulating surface that is in contact with an interlocking projection when the lock member is in the disengaged position, and a first swing regulating surface that is formed of A second swing regulating surface that is in surface contact with the interlocking projection when the lock member is at the engagement fixed position, and a minimum opposition between the first swing regulating surface and the second swing regulating surface. The point is that the interval is configured to be slightly larger than the diameter of the interlocking projection.

According to a fourth characteristic configuration of the key device according to the present invention, in addition to any one of the first to third characteristic configurations of the key device, one of the opening and closing doors is used to constitute the key mechanism. A latch main body having an engaging portion that can be engaged with the engaged portion through an opening formed in the casing, and a first elastic urging member that urges the latch main body toward the engaging side; And an operation shaft that is movable in a direction perpendicular or substantially perpendicular to the direction in which the latch body extends and retracts, and the latch body contacts a pressing body provided at one end of the operation shaft. A cam surface for moving the latch body toward the disengagement side against the elastic restoring force of the first elastic urging member in accordance with a pulling operation of the operation shaft in the contact state; Between the casing and the operating shaft, the operating shaft Lies in providing the second elastic urging body that moves urging the one end side.

According to a fifth feature of the key device of the present invention, in addition to the fourth feature of the key device, the latch body has
A through-hole into which one end of the operating shaft enters is formed in a state in which the retractable movement between the engagement position and the disengagement position of the latch body is allowed. A cam groove provided with the cam surface, and a pressing body, each of which is opposed to each other in a direction perpendicular or substantially perpendicular to an extending / retreating direction of the latch body and an axis of the operation shaft. Press projections are formed.

[0011]

According to the first characteristic configuration of the key device of the present invention, when both the pair of doors are in the closed posture, the engaging portion of the key mechanism provided on one door is provided on the other door. And the lock member of the door closing mechanism provided on the other opening / closing door is engaged with the second engaged portion provided on the door mounting / fixing portion. The locked state of the lock member is forcibly held by an operating member that is activated by contact with one of the doors that is pivotally operated to the closed position. Even if a large external force in the opening direction acts due to hitting of a collapsed stored object, the doors do not open and swing. And yet,
When the operation shaft of the key mechanism provided on one of the doors is disengaged and one of the doors is opened and swung, the operating member of the door closing mechanism provided on the one of the doors and the other is provided. Is released, and the lock member is switched to the disengaged position by the return biasing force of the return biasing member, so that the lock release operation on the other door is completely unnecessary. Furthermore, other
Locking member on the casing side attached to the opening and closing door
And the axis of the pin-shaped second engaged portion on the door mounting / fixing portion side.
It is configured as a hook that can swing around the parallel vertical axis.
Therefore, for example, the second engaged portion can
The buried and fixed cylindrical base material and the pin-shaped lock of the door closing mechanism
A lock member can be engaged, and a cylindrical shaft is provided with respect to the cylindrical base material.
Cylindrical receiving member screwed in and out along the core direction
The pin-shaped second cover is
The range in which the lock member can be engaged with the engagement portion is widened,
As a result, door mounting fixtures and opening / closing doors have been
The locking member on the door and the door
The relative mounting position of the attachment fixing part and the second engaged part has changed.
However, the change margin is within the range of the engagement swing of the lock member.
Then, the hook-shaped locking member is connected to the pin-shaped second engaged portion.
Can be reliably engaged.

According to the second characteristic configuration of the key device of the present invention,
When the hook-shaped lock member is engaged with the second engaged portion, an elastic holding body projecting toward the longitudinal axis from the engagement operation surface of the lock member contacts the second engaged portion. With this, it is elastically deformed and deformed, and regulates the relative movement between the lock member and the second engaged portion.

According to a third feature of the key device of the present invention,
By interlocking the interlocking projection of the operating member into the through hole of the lock member, it is possible to reduce the mounting interval between the two and to switch the lock member between the disengaged position and the fixed position. When swinging, the first swing regulating surface and the second swing regulating surface formed on the inner surface of the through hole of the lock member come into surface contact with the interlocking projection of the operating member, and the switching operation force at that time is dispersed. Can be accepted. Further, the minimum opposing distance between the first swing regulating surface and the second swing regulating surface is configured to be slightly larger than the diameter of the interlocking projection, so that the lock member is engaged with the disengaged position. Even if it is located in the middle between the fixed position and the interlocking projection of the operating member and the lock member, play does not occur or rarely occurs.

According to a fourth feature of the key device of the present invention,
When a key mechanism is attached to one of the opening / closing doors, if a mounting error or the like occurs such that the mounting position of the key mechanism is shifted in the retracting direction of the latch body, the pressing body of the operating shaft reaches one end of the cam surface of the latch body. Before, the tip of the engaging portion of the latch body comes into contact with the first engaged portion of the other opening / closing door, and in a range where the pressing body of the operation shaft reaches one end of the cam surface of the latch body from the contact state. The operation shaft becomes movable (playable). Even in this case, the operation shaft is urged to move to one end side in the axial direction by the second elastic urging body. There is no backlash in the core direction.

According to a fifth characteristic configuration of the key device of the present invention,
One pressing body for operating the latch body to the unlocked position against the elastic restoring force of the elastic urging body in accordance with the pulling operation of the operation shaft is moved in the retracting direction of the latch body and the operation shaft. Since it is composed of a pressing projection formed at one end of the operation shaft in a state protruding in a direction perpendicular or substantially perpendicular to the axis direction, even when forming a through hole in the latch body, It is only necessary to consider the space allowing the retreating movement between the engagement position and the disengagement position and the space into which the pressing projection having a small width in the retreating direction of the latch body enters. Can be reduced in size. In addition, since the cam groove having the cam surface with which the pressing protrusion of the operation shaft engages is formed in the thickness of the latch body facing the through hole, the cam groove is provided in the recess of the latch body. Conventional structure in which two projections are protruded (for example, Japanese Utility Model Publication No. 2-35968).
Or a space for providing a protrusion in the recess of the latch body, or a cam surface (top) and a casing facing the cam surface when the latch body is in the disengaged position. It is not necessary to secure a gap for the pressing body to move between the inner surface of the casing and the dimension in the axial direction of the operating shaft of the casing, and the extending and retracting direction of the latch body and the axial direction of the operating shaft. On the other hand, it is possible to reduce the dimension in the direction orthogonal or substantially orthogonal to the direction.

[0016]

According to the first characteristic configuration of the key device of the present invention, a large external force in the opening direction acts on the inner surface side of the open / closed door in the closed position, for example, when a collapsed object hits the inner side of the door. However, it is possible to reliably prevent the opening / closing doors from opening due to the external force, and when opening the pair of doors, the operation shaft of the key mechanism provided on one of the doors is disengaged. It is not necessary to perform any operation on the door closing mechanism provided on the other open / close door, and the open / close operation of both open / close doors can be performed quickly and easily. Plus, years of use
Due to deformation of the door fixing part and the opening / closing door
The lock member on the opening / closing door side and the second cover
Even if the mounting position relative to the engaging part slightly changes,
If the margin is within the range of engagement rocking of the lock member,
It is not necessary to correct the mounting position
Between the hook-shaped locking member and the pin-shaped second engaged portion.
The actual engagement state can be maintained.

According to a second characteristic configuration of the key device of the present invention,
In addition to the effects of the first characteristic configuration of the key device, the relative movement between the lock member in the engaged state and the second engaged portion is regulated by the elastic restoring force of the elastic holding member that elastically bends and deforms. Thus, the lock member can be engaged with the second engaged portion without play.

According to a third characteristic configuration of the key device of the present invention,
In addition to the effect of the first or second characteristic configuration of the key device, not only can the door closing mechanism be reduced in size, but also the interlocking projection of the operating member forming the interlocking means and the through hole of the lock member. The rattling between the lock member and the operating member can be suppressed over the entire range from the disengaged position of the lock member to the engagement fixed position while improving the durability of the inner peripheral surface facing the above.

According to a fourth characteristic configuration of the key device of the present invention,
In addition to the effects of any one of the first to third characteristic configurations of the key device, before the pressing body of the operation shaft reaches one end of the cam surface of the latch body due to a mounting position error of the casing or the like. Even if the tip of the engaging portion of the latch body abuts on the engaged portion on the fixed portion side, play (play) in the axial direction of the operation shaft can be prevented.

According to a fifth characteristic configuration of the key device of the present invention,
In addition to the effect of the fourth characteristic configuration of the key device, a cam surface for operating the latch body to the unlocked position against the elastic restoring force of the elastic urging member with the pulling operation of the operation shaft; By devising each forming position and shape of the operation shaft as described above, the entire key device can be moved in the three-dimensional directions of the retracting direction of the latch body, the axis of the operation shaft, and the direction substantially orthogonal to both directions. Both can be configured compactly.

[0021]

Embodiment 1 First Embodiment A key device provided on a double door type door of furniture shown in FIGS. 1 to 10 is provided on each of left and right side plates (or vertical frames) 1A and 1B of a door fixing part 1. Among a pair of doors 2A and 2B that are swingably openable and closable around the axis of the vertical axis, a first engaged portion 13 provided at the center in the vertical direction of one of the doors 2A and the other door 2B in the vertical direction. An engagement portion 14A that engages with the first door 2A to hold both doors 2A and 2B in a closed position, and one door 2A
A key mechanism A having an operating shaft 16 for disengaging the engaging portion 14A by an operation from the front side of the door is provided. A lock member for fixing the opening / closing door 2B in a closed posture by engaging the second engaged portions 3 provided on each of the top plate (or upper frame) 1C and the bottom plate (or lower frame) 1D of the portion 1. 4, a torsion coil spring (an example of a return urging member) 5 for urging the lock member 4 to return to the disengaged position,
When one of the doors 2A is swung to the closed position while the other of the doors 2B is in the closed position, the lock member 4 is twisted with the contact with the one of the doors 2A. A door closing mechanism B is provided which includes an operating member 6 for performing a lock operation at the engagement fixed position against the return urging force.

Next, the specific structure of the key mechanism A will be described. As shown in FIGS. 2 to 6, one open / close door 2 </ b> A
An opening 12 formed in the casing 10 is formed in a casing 10 made of an ABS resin, which is attached to one side surface with screws or the like.
Engaged portion 1 provided on the other opening / closing door 2B
3 and a pair of coil springs 15 as an example of an elastic urging member for urging the latch main body 14 toward the engaging side. And a cylindrical operation shaft 16 made of Duracon resin which is movable in a direction (including a substantially orthogonal direction) perpendicular to the extending / retracting direction of the latch body 14. The latch main body 14 is brought into contact with the pressing body 17 provided at one end of the operation shaft 16, and the latch main body 14 is brought into contact with the coil body by the operation of pulling the operation shaft 16 toward the surface of the opening / closing door 2 </ b> A in the contact state. A cam surface 18 is formed to move toward the disengagement side against the elastic restoring force of the spring 15. Further, the other end of the operation shaft 16 has one end side of the operation shaft 16 (the back surface of the door A). Side) through the connecting bolt 19 inserted from The operating member 20 of the knob or the like are fixedly connected.

The casing 10 includes a case 21 that opens toward the other end of the operation shaft 16,
And a lid 22 which is detachably fitted and held in a step formed on the periphery of the opening of the case 21 in a state where the opening is closed. A cylindrical guide tube portion 22A is formed so as to protrude so as to slidably move the other end portion side of the slide member 16 along the axial direction.

Each of the inner surfaces of the side walls 21A of the case 21 along the long side direction is orthogonal to both the extending and retracting direction of the latch body 14 and the axis of the operation shaft 16 of the latch body 14. A concave portion 21B is formed on each of both side surfaces in the direction (thickness direction of the opening and closing door 2A) so that the spring receiving portion 14B is movably engaged in the retracting direction. Latch body 1
Each of the end faces opposed to the columnar spring retaining protrusion formed on the spring receiving portion 14B of No. 4 is configured as a spring receiving portion 21C for holding the coil spring 15 between the spring receiving portion 14B and the spring receiving portion 14B. is there. The latch body 14 is provided on one side wall 21A along the short side direction of the case 21.
An opening 12 through which a tapered (approximately triangular prismatic) engaging portion 14A formed at the end of the groove 12 extends and retracts is notched, and the first engaged portion 13 has a latch body 14 formed therein. The engaging portion 14A is engaged with the concave portion 1 having a locking surface capable of preventing the engaging portion 14A from moving in the door opening direction.
3a are formed.

On the inner surface of the top plate 21D of the case 21, a pair of guide plates 23 for slidably guiding the quadrangular columnar portion 16A formed on the operation shaft 16 only in the axial direction is provided on the latch body 14. The guide surfaces of the two guide plates 23 are formed on the outer surface of the quadrangular columnar portion 16A of the operating shaft 16 along the axial direction. A substantially triangular prism-shaped ridge 23a is formed integrally with the vertical groove 16a having a substantially V-shaped surface.

The latch body 14 has one end of the operating shaft 16 and the two guide plates 2 in a state where the movement of the latch body 14 between the engaging position and the disengaging position is allowed.
3 is formed into a rectangular through hole 24 into which the latch body 14 extends and retracts, and between the inner surface of the latch body 14 facing the through hole 24 and the outer surface of the operation shaft 16, and the operation shaft 16.
A substantially V-shaped cam groove 25 provided with the cam surface 18 in each of the portions facing each other in a direction orthogonal to or substantially orthogonal to the axial center direction (thickness direction of the door A); An elongated columnar pressing projection constituting the pressing body 17 is formed. As shown in FIG. 3, when the latch main body 14 is held at the engagement position where the latch main body 14 protrudes to the outside of the case 21 by the elastic restoring force of both coil springs 15 as shown in FIG. The cam surface 18 is configured to be positioned at one end on the mountain (top) side (one end on the side farthest from the back surface of the opening / closing door 2A). The end faces of the two ridges 23a on the case 21 side contact the one end of the vertical groove 16a formed in the columnar part 16A from the axial direction, and the end face of the operating member 20 is the guide cylinder of the lid 22. The guide tube 27 is configured to come into contact with the end surface of the portion 22A in the axial direction with respect to a guide cylinder 27 described later. However, the door 2A
Depending on the mounting position error of the casing 10 with respect to the cam surface 18, the tip of the engaging portion 14 </ b> A of the latch
The operating shaft 16 is pushed into the latch body 14 in the range from the contact state to the depression 13a of the engaged portion 13 to the position where the pressing projection 17 is located at the peak (top) of the cam surface 18. Be free. That is, although so that backlash (play) occurs in the range to the operation member 20 connected to the operating shaft 16, in this onset bright, in the guide tube portion 22A of the lid 22, and the guide A flange portion 22b formed at an end of the cylindrical portion 22A and a quadrangular columnar portion 16A of the operating shaft 16
The operating shaft 16 is moved and biased to one end side in the axial direction between the other end surface of the operating shaft 16, in other words, with respect to one end of the vertical groove 16 a formed in the quadrangular columnar portion 16 A of the operating shaft 16. , End faces of both protruding strips 23a on the case 21 side come into contact with each other from the axial direction,
In addition, an example of a second elastic biasing body that moves and biases the operating shaft 16 to one end in the axial direction such that the end surface of the operating member 20 abuts on the end surface of the guide cylinder 27 from the axial direction. Since the compression coil spring 26 is interposed,
The operation member 20 connected to the operation shaft 16 does not rattle (play).

Both end surfaces in the width direction of the two guide plates 23 and the outer surface portion of the operating shaft 16 located on the same side as the both end surfaces come into contact with the inner surface facing the through hole 24 of the latch body 14. And a guide surface for slidingly guiding the latch body 14 so as to be able to move back and forth, and the connecting bolt 19 is passed through the cylindrical hole of the operating shaft 16 to the top plate 21D of the case 21 so that the operating member 20 is A through hole 21b is formed in the female screw portion for screwing operation. Also,
A guide cylinder 27 made of ABS resin is attached to a through hole 28 formed in the opening / closing door 2A so as to slidably guide the cylindrical portion of the operation member 20 in a tensionable manner.

The first engaged portion 13 is integrally formed of nylon resin, and a screw 2 is attached to the back surface of the other door 2B.
In the front surface of the mounting plate portion 13b provided with a screw hole for tightening and fixing at 9, the above-mentioned V-shaped portion is provided at a portion opposed to the engaging portion 14A of the latch body 14 provided on the one opening and closing door 2A side. A concave portion 13a is formed.

Further, the engaging portion 14A of the latch body 14
Is formed on a cam surface 14a that is inclined at an angle of 45 degrees with respect to the front-rear direction (door thickness direction) and the left-right direction, and one of the doors 2B is in a closed posture when the other door 2B is in a closed posture. When the opening / closing door 2A is pivoted to the closed position, the latch body 14 is temporarily attached to the two coil springs 15 with the contact between the cam surface 14a of the latch body 14 and the first engaged portion 13. After retreating to the disengagement position side against the urging force, it again projects to the engaging position by the urging force of the two coil springs 15 and engages with the recess 13 a of the first engaged portion 13. It is not necessary to disengage the operation member 20 each time the opening / closing door 2A is swung to the closed position. However, as described above, when the cam surface 14a is formed on the rear surface side of the door of the engagement portion 14A of the latch body 14, the collapsed items due to an earthquake or the like are located on the rear surface sides of both the open / close doors 2A and 2B in the closed posture. When a large external force is applied in the opening direction due to contact with the cam surface 1 of the latch body 14 in the engaged state.
4a is pressed by the first engaged portion 13, and the pressing force causes the latch body 14 to retreat to the disengagement position side against the urging force of the two coil springs 15, and the latch body 1
The engagement margin between the engaging portion 14A and the first engaged portion 13 gradually becomes shallower, and finally, the engagement between the two is released, the doors 2A, 2B open, and the stored items fall. May be scattered around. However, in the present invention, the other door 2B
Is provided with a door closing mechanism B, even if a large amount of external force in the opening direction acts on the back side of the two open / close doors 2A and 2B in the closed position due to the collapse of a stored object due to an earthquake or the like.
Both doors 2A, 2B are maintained in the closed position.

Next, a specific configuration of the door closing mechanism B will be described. As shown in FIGS. 2 and 7 to 10, a pin provided on the door mounting and fixing portion 1 in an up-down direction on an ABS resin casing 32 provided with a mounting portion 31 to the other opening / closing door 2 </ b> B. Hook member 4 made of nylon resin, which can swing around a vertical axis Y parallel to the axis of the second engaged portion 3, and a horizontal axis orthogonal to the vertical axis Y Operating member 6 made of Duracon resin swingable around X
When the operating member 6 is pressed by the contact with one of the open / close doors 2A that is swingably operated to the closed position, the lock member 4 is moved from the disengaged position to the second engaged state. Interlocking means 7 for interlocking the lock member 4 and the operating member 6 so as to swing to an engagement fixed position for engaging the portion 3
And a torsion coil spring (which is an example of a return biasing member) 5 that biases the lock member 4 to return to the disengaged position is interposed between the operating member 6 and the casing 32. It is.

The tip-side working surface portion 4a of the engaging working surface 4A of the hook-shaped lock member 4 is formed in an arcuate surface with the longitudinal axis Y as the center of rotation. The end-side working surface portion 4b is formed as an arc surface having a large curvature in a state of gradually approaching the longitudinal axis Y from a virtual arc surface passing through the tip-side working surface portion 4a. The locking member 4 protrudes toward the vertical axis Y from the engagement surface 4A, and can be bent and deformed away from the vertical axis Y in contact with the pin-shaped second engaged portion 3. An arc-shaped elastic holding body 4B is formed by integral molding. In the case of the structure of this embodiment, the range in which the lock member 4 can be engaged with the pin-shaped second engaged portion 3 is wider than in the case of locking with a pin that can move up and down in the vertical direction. , Door fixing part 1 and opening / closing door 2B that have been used for many months
The locking member 4 on the side of the door 2B due to deformation such as warpage of the door.
Even if the relative mounting position of the second engaging portion 3 on the door mounting and fixing portion 1 side changes, if the change is within the range of the engagement swing of the locking member 4, the hook-shaped locking member 4 can be engaged with the pin-shaped second engaged portion 3. Moreover,
At this time, the elastic holding member 4B is elastically bent and deformed in accordance with the contact with the pin-shaped second engaged portion 3, and the second engaged portion 3 engaged with the lock member 4 is loosened. It can be pressed and held without any sticking. The interlocking means 7 includes a pin-shaped interlocking projection 6A provided on the operating member 6 and the interlocking projection 6
A is engaged with the through-hole 4C of the lock member 4 into which the lock member 4 is engaged. When the lock member 4 is at the disengagement position, the interlocking projection 6 is formed on the inner peripheral surface facing the through-hole 4C.
A first rocking regulation surface 4d that makes surface contact or line contact with A, and a second swing regulation surface 4e that makes surface contact or line contact with the interlocking projection 6A when the lock member 4 is in the engagement fixed position is locked. It is formed so as to intersect in a substantially V-shape at an intermediate position in the plate thickness direction of the member 4, and furthermore, a minimum opposing interval between the first swing regulating surface 4e and the second swing regulating surface 4d, The minimum diameter at the point where the first swing regulating surface 4d and the second swing regulating surface 4e intersect in a V-shape is slightly larger than the diameter of the interlocking projection 6A.

The casing 32 has a case 32A which opens toward the back side of the door 2B, and a lid which is detachably fitted and held on the periphery of the opening of the case 32A in a state where the opening of the case 32A is closed. The case 32A has a fan-shaped mounting portion 31 having two screw holes, and is integrally formed with the case 32A. Further, the case 32A has a first bearing portion 32a for rotatably supporting the swing fulcrum shaft portion 4D of the lock member 4 around the vertical axis Y and a swing fulcrum shaft portion 6B of the operating member 6 in a horizontal direction. And a second bearing portion 32b rotatably supported around the axis X.
On the inner surface of 2B, a pair of regulating plate portions 32c for preventing the swinging fulcrum shaft portion 4D of the lock member 4 from coming out of the case 32A is supported by the first bearing portion 32a of the case 32A.
A pair of restricting plate portions 32d are formed integrally with each other to prevent the swinging fulcrum shaft portion 6B of the operating member 6 supported by the second bearing portion 32b of the 2A from coming off. In addition, each of the top plate 1C and the bottom plate 1D of the door mounting / fixing section 1 is provided with a stopper member 1E which comes into contact with the opening / closing doors 2A, 2B pivoted to the closed position .

[Other Embodiments] In the above-described embodiments, coil springs are used as the return urging member 5, the second elastic urging member 15, and the second elastic urging member 26, respectively. Other elastic urging members such as rubber may be used. In the above-described embodiment, the key device provided on the double-door type door of furniture such as a cupboard and a bookcase has been described. However, the technology of the present invention is also applied to the key device provided on the double-door type door of a fitting. be able to. In the above-described embodiment, the door closing mechanism B is provided at the upper and lower two places of the other opening and closing door 2B. However, the door closing mechanism B may be provided at any one of the upper and lower directions of the opening and closing door 2B. . The key mechanism A is not limited to the one having the structure of the above-described embodiment, but is engaged with the first engaged portion 13 provided on the other opening / closing door 2B to connect the two opening / closing doors 2A and 2B. Any structure provided with an engaging portion 14A for holding the closed position and an operating shaft 16 for disengaging the engaging portion 14A by an operation from the front side of one of the doors 2A. May be used.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a key device for an opening / closing door showing a first embodiment.

FIG. 2A is a perspective view of a main part when one of the doors is closed, and FIG. 2B is a perspective view of a main part when the two doors are in a closed position.

FIG. 3A is a horizontal cross-sectional view when the key mechanism is locked, and FIG. 3B is a horizontal cross-sectional view when the lock mechanism is unlocked.

FIG. 4 is an exploded perspective view of a key mechanism.

FIG. 5 is an exploded perspective view of a latch body and an operation shaft.

FIG. 6 is a sectional view of a key mechanism.

FIG. 7 is an exploded perspective view of a door closing mechanism.

FIG. 8 is a sectional view of a door closing mechanism.

FIG. 9A is a longitudinal sectional view showing the unlocked state of the door closing mechanism. FIG. 9B is a longitudinal sectional view showing the locked state of the door closing mechanism.

10A is a partially cutaway side view showing a locked state of the door closing mechanism, and FIG. 10B is a partially cutaway side view showing the locked state of the door closing mechanism.

[Explanation of symbols]

 Reference Signs List A key mechanism B door closing mechanism Y vertical axis X horizontal axis 1 Door mounting and fixing part 2A Opening / closing door 2B Opening / closing door 3 Second engaged part 4 Lock member 4B Elastic holding body 4C Through hole 4d First swing regulating surface 4e Second swing regulating surface 5 Return biasing body 6 Operating member 6A Interlocking protrusion 7 Interlocking means 12 Opening 13 First engaged portion 14 Latch body 14A Engaging portion 15 First elastic biasing member 16 Operating shaft 17 Pressing member (Pressing projection) 18 Cam surface 24 Through hole 25 Cam groove 26 Second elastic biasing body 32 Casing

Claims (5)

(57) [Claims] 1. A pair of doors (2A, 2B) that are swingably opened and closed on a door mounting fixed part (1), and are provided on one of the doors (2A) and on the other door (2B). The two doors (2A, 2A) are engaged with the first engaged portion (13).
B), an engaging part (14A) for holding the closed position, and an operating shaft (16) for disengaging the engaging part (14A) by an operation from the front side of the one door (2A). A key mechanism (A) is provided, and the other opening / closing door (2B) is provided with a second key provided on the door fixing portion (1).
The open / close door (2B) is engaged with the engaged portion (3).
A lock member (4) for fixing the lock member in the closed position, a return urging member (5) for returning the lock member (4) to the disengaged position, and the other opening and closing door (2B) are in the closed position. When one of the doors (2A) is pivotally operated to the closed position in this state, the lock member (4) is brought into contact with the one of the doors (2A) so that the return urging member (5) is moved. A key device for an opening / closing door provided with a door closing mechanism (B) having an operating member (6) for locking the engagement at a fixed position against a return biasing force.
In order to compose the door closing mechanism (B), the other door (2)
B) mounting the door on a casing (32) mounted on the door;
Axis of the pin-shaped second engaged portion (3) on the fixing portion (1) side
Hook-shaped lock that can swing around the vertical axis (Y)
And (b) perpendicular to or substantially perpendicular to the longitudinal axis (Y).
Actuating member that can swing about the horizontal axis (X) that is approximately perpendicular
(6), and the operating member (6) is
Contact with one of the open / close doors (2A) that is pivoted to the closed position
When pressed by this, the lock member (4) is engaged.
Engagement fixed to engage the second engaged portion (3) from the disengagement position
The locking member (4) and the actuating part for swinging to the position
An interlocking means (7) for interlocking the material (6) is provided.
The return urging body (5) is connected to the operating member (6) by a case.
Key device for the opening / closing door interposed between the opening and closing (32) . 2. The locking member (4) protrudes from the engagement surface (4A) of the locking member (4) toward the longitudinal axis (Y) to provide the second engaged portion (3). ) and Setto door key device according to claim 1, wherein the elastic clamping member for deformed elastically (4B) is integrally formed with the of. 3. An actuating member (6), wherein said interlocking means (7) is an actuating member (6).
And a through hole (4C) of the lock member (4) into which the interlocking projection (6A) engages, and an inner peripheral surface facing the through hole (4C). The first swing regulating surface (4) which comes into surface contact with the interlocking projection (6A) when the lock member (4) is at the disengaged position.
d) and a second swing regulating surface (4e) which makes surface contact with the interlocking projection (6A) when the lock member (4) is in the engagement and fixed position.
Are formed, and the first swing regulating surface (4
d) the minimum face spacing between the second swing regulating surface (4e) is, the interlocking projection (6A) door key device has been has claim 1 or 2, wherein configuration slightly larger than the diameter of the. 4. The key mechanism (A) includes a casing (10) attached to one of the doors (2A).
An engaging portion (14) that can be engaged with the first engaged portion (13) through an opening (12) formed in the casing (10).
A), and a first elastic biasing member (1) for urging the latch body (14) to protrude toward the engagement side.
5) and an operation shaft (1) that is movable in a direction orthogonal or substantially orthogonal to the direction in which the latch body (14) moves out and back.
6), and a pressing body (1) provided at one end of the operating shaft (16) is provided on the latch body (14).
7) and the operating shaft (16) in the contact state
A cam surface (18) for moving the latch body (14) to the disengagement side against the elastic restoring force of the first elastic urging body (15) with the pulling operation of the casing; Between the operating shaft (16) and the operating shaft (16).
Elastic urging body (2) for urging the first elastic body toward one end in the axial direction.
The key device for an opening / closing door according to any one of claims 1 to 3 , further comprising (6). 5. A through-hole into which one end of the operating shaft (16) enters the latch body (14) in a state of allowing the latch body (14) to move back and forth between the engaged position and the disengaged position. (24) is formed, and between the inner surface of the latch body (14) facing the through-hole (24) and the outer surface of the operating shaft (16), the direction in which the latch body (14) is retracted and the operating shaft (16). A cam groove (25) provided with the cam surface (18) and a pressing projection constituting the pressing body (17) at each of the portions opposed to each other in a direction orthogonal or substantially orthogonal to the axial center direction. The key device for an opening and closing door according to claim 4, wherein a key is formed.