JP2013160022A - Latch lock device and door provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a latch lock device capable of reducing a projection amount of a latch in a door open state even while a door closed state can be regulated, and a door provided with it.SOLUTION: A latch lock device 2 includes: a latch part 30 which is freely displaced along a width direction of a door between a projected position at which it is inserted to a latch receiver 7a provided on a door frame 6 to regulate a closed state of a door 1 and a withdrawn position at which it allows opening of the door; an energizing member 29 for energizing the latch part in a projecting direction; an operation part 26 connected to a handle 18 of the door, for displacing the latch part to the withdrawn position opposing energizing force of the energizing member in linkage with an operation of the handle; and a latch position regulation part 34 alternately switched to the state of holding the latch part at a small projection position between the withdrawn position and the projected position and the state of allowing the displacement toward the projected position every time the latch part is displaced toward the withdrawn position side and regulation on the withdrawn position side is released.

Description

  The present invention relates to a latch locking device incorporated in a door and a door provided with the same.

  2. Description of the Related Art Conventionally, a latch lock device incorporated in a door provided with a latch (latch head) that can be moved in and out is known. In such a latch lock device, the protruding latch is inserted into the latch receiver of the door frame to regulate the closed state of the door, while the latch is immersed in conjunction with the operation of a handle such as a lever handle provided on the door. Thus, the door can be opened (see, for example, Patent Document 1 and Patent Document 2 below). In addition, such a latch lock device is configured such that the latch is urged in the protruding direction by the urging member, and the latch protrudes when the operation of the handle to the open side is released.

JP-A-11-2223060 JP 2001-262909 A

  However, in the latch lock device as described in each of the above patent documents, for example, if the handle is not operated to the open side, the latch is also on the door side of the door even in the door open state (fully open state, half open state). It remains largely protruding from the end face. In such a latch locking device, it has been considered that the latch becomes an obstacle when the door is open, or a load or the like is caught on the latch. In order to alleviate such a problem, it is conceivable to reduce the protruding amount of the latch itself in the protruding state. However, in this case, the latching margin of the latch on the latch receiver of the door frame becomes small when the door is closed. For this reason, it may be difficult to regulate the closed state of the door depending on the clearance between the door and the door frame provided to allow the door to be opened and closed smoothly, as well as the processing errors and construction errors of the door and door frame. It is done.

  The present invention has been made in view of the above circumstances, and includes a latch locking device that can reduce the amount of protrusion of the latch in the open state of the door while allowing the door to be closed, and a door including the same. It is intended to provide.

  In order to achieve the above object, a latch locking device according to the present invention includes a protruding position that is inserted into a latch receiver provided on a door frame to restrict the closed state of the door and an immersion position that allows the door to be opened. A latch part that is freely displaceable along the width direction of the door, a biasing member that biases the latch part in the protruding direction, and a handle of the door, in conjunction with the operation of the handle An operation part that displaces the latch part to the immersive position against the urging force of the urging member, and the latch part that is displaced toward the immersive position side, each time the restriction on the immersive position side is released. A latch position restricting portion that is alternately switched between a state in which the latch portion is held at a small protruding position between the immersion position and the protruding position and a state in which the latch portion can be displaced toward the protruding position. It is characterized by.

  In the present invention, the latch position restricting portion is provided on one side of the latch portion and the latch case that accommodates the latch portion, the shaft-like portion having the axial direction along the protruding direction of the latch portion, and the other A cylindrical portion that is provided on the side and receives the shaft-shaped portion, and a locking projection is provided on one of the outer peripheral surface of the shaft-shaped portion and the inner peripheral surface of the cylindrical portion, and the other A short groove that holds the latch portion in the small protruding position by locking the locking protrusion, and a long groove that receives the locking protrusion and displaces the latch portion toward the protruding position. Locking projection holding portions alternately having a circumferential direction, and the locking projections are guided relative to the shaft portion in accordance with the displacement of the latch portion toward the immersion position. Each time the latch part is displaced toward the immersive position, the locking projection is locked in the short groove. A guide teeth be positioned alternately in the long groove Noh position to the acceptable position, it may be provided.

  In order to achieve the above object, a door according to the present invention includes a door body, a latch lock device according to the present invention, and a handle connected to an operating portion of the latch lock device. Features.

  The latch lock device according to the present invention and the door provided with the same are configured as described above, so that the amount of protrusion of the latch in the opened state of the door can be reduced while the closed state of the door can be regulated. Can do.

(A), (b) shows typically an example of the latch locking device which concerns on one Embodiment of this invention, and a door provided with this, (a) is Y1 part in Fig.5 (a). Corresponding partially omitted schematic longitudinal sectional view, (b) is a partially broken schematic transverse sectional view corresponding to the Y2 part in FIG. 5 (b). (A) is a partially broken schematic cross-sectional view corresponding to FIG. 1 (b), and (b) is a partially omitted schematic vertical cross-sectional view corresponding to FIG. 1 (a). (A) is a partially omitted schematic longitudinal sectional view corresponding to FIG. 1 (a), and (b) is a partially broken schematic transverse sectional view corresponding to FIG. 1 (b). (A)-(d) shows typically an example of the latch position control part with which the same latch locking device is provided, (a)-(c) is a partially omitted schematic perspective view, (d), It is a partially broken schematic development view. (A) is a partially broken schematic front view schematically showing a state in which the door is constructed, and (b) is a partially broken schematic cross-sectional view corresponding to the XX line arrow in (a). is there.

Embodiments of the present invention will be described below with reference to the drawings.
FIGS. 1-5 is a figure which shows typically an example of the latch lock apparatus which concerns on this embodiment, and a door provided with the same.
In some of the drawings, some of the detailed reference numerals attached to other drawings are omitted.
Moreover, in the following embodiments, the upper side in FIG. 5B is the back side and the lower side is the front side, and the door is constructed based on the state seen from the Z direction shown in FIG. 5B. In principle, directions such as up and down will be explained based on the state.

As shown in FIG. 5, the door 1 according to this embodiment includes a door body 10, a latch lock device 2 according to this embodiment provided at a door end side end portion 11 of the door body 10, and the latch lock. And a handle device 15 connected to the device 2.
Moreover, in this embodiment, the door 1 is shown in the door frame 4 attached to the opening formed in the inner wall of buildings, such as a residence, so that opening and closing is possible.
The door frame 4 includes an upper frame 5 and a pair of vertical frames (door end side vertical frame 6 and suspension side vertical frame 8) each having an upper end fixed to both longitudinal ends of the upper frame 5. I have. The door frame 4 and the floor surface define an entrance / exit 3 that connects the near side space and the back side space of the inner wall. This doorway 3 is opened or closed by the door 1.

  As shown in FIG. 5B, the door-end side vertical frame 6 is provided with a latch receiver 7 a into which the latch portion 30 provided in the latch lock device 2 of the door 1 is inserted. In the present embodiment, a latch receiver 7 is attached to the door-end side vertical frame 6, and the latch receiver 7 is provided with a latch receiving recess 7 a serving as a latch receiver. The latch receiver 7 extends from the latch receiving recess 7a so as to extend along the inner side surface (expected surface) of the door-end side vertical frame 6, slightly protrudes toward the front side, and the front side of the door-end side vertical frame 6 ( A curved guide portion 7b curved toward the (finding surface) side is provided (see also FIG. 1B).

The latch receiver 7 as described above is embedded in a recess provided on the inner side surface of the door-end side vertical frame 6 so as to open toward the suspension-side vertical frame 8, and forms a latch receiving recess 7a. (Strike box) may be provided. The latch receiver 7 may include a latch receiving plate (strike) having a latch insertion hole provided in communication with the latch receiving concave portion 7a and having a curved guide portion 7b. Or you may make it employ | adopt the latch receiver 7 which formed these trojokes and a latch receiving plate integrally.
Moreover, the door end side vertical frame 6 is provided with a door stop 6a that is brought into contact with or close to the door end side end portion 11 of the door 1 (door body 10) in a closed state. This door stop 6a is provided at a substantially central portion in the front-rear direction (wall thickness direction) of the inner side surface of the door-end side vertical frame 6, and is provided on the back side of the latch receiving recess 7a.

The suspension side vertical frame 8 is connected to the door 1 (door body 10) via the connecting member 9, and supports the door 1 so that it can be opened and closed. In the illustrated example, the connecting member 9 is rotatably connected by hinge pins to attachment blades attached to the inner surface (expected surface) of the suspension side vertical frame 8 and the suspension side end surface 14 of the door 1 (door body 10). An example of a hinge (blade hinge) 9 is shown. The door 1 (door body 10) is opened and closed with the hinge pin of the hinge 9 as an opening / closing fulcrum (rotating fulcrum).
Further, the hanging side vertical frame 8 is provided with a door stop 8a that comes into contact with or is close to the hanging side end 13 of the door 1 (door body 10) in a closed state. This door stop 8 a is provided so as to coincide with the door stop 6 a provided in the door-end side vertical frame 6 in the front-rear direction, and is provided on the back side of the attachment blade of the hinge 9.

The upper frame 5 may be provided with a door stop similar to the above.
Further, in the illustrated example, the entrance / exit 3 is divided by the door frame 4 and the floor surface, but in addition to the upper frame 5 and the pair of vertical frames 6 and 8 described above, a twist (lower frame) is provided. A door frame may be adopted, and the doorway 3 may be partitioned by this door frame.
Moreover, in the example of a figure, although the door 1 is shown in the state of constructing it as a right hanging base (right hand) with the right side edge part as a hanging side in the state of front opening (inward opening), the left side edge part is shown. You may make it construct as a left-handed hand.

As shown in FIG. 5, the door body 10 has a substantially rectangular flat plate shape, and has a height dimension and a width dimension corresponding to the opening height and opening width of the entrance 3 so that the entrance 3 can be closed. Yes.
The door-end side end portion 11 of the door body 10 is provided with a latch housing recess that opens toward the outer side in the width direction of the door body 10 on the door-end side end face 12. The latch lock device 2 is accommodated in the latch accommodating recess.
Further, the door-end side end portion 11 of the door body 10 is provided with an attachment hole that opens at the front and back surfaces of the hand body and communicates with the latch housing recess. The handle device 15 is attached using this attachment hole.

  As shown in FIG. 5B, the handle device 15 includes a pair of grips 18 and 18 that are disposed so as to face each other on the front side and the back side of the hand with the door body 10 interposed therebetween. In the present embodiment, these grips are levers 18 and 18 having grip portions in the shape of elongated bars. As shown in FIGS. 2 (b) and 5 (a), the pair of levers 18 and 18 are in a state in which the longitudinal direction is substantially horizontal when the operation is not performed (normal state). The The pair of levers 18 and 18 are coupled to each other via a connecting shaft 16 and are rotatable around the connecting shaft 16. The connecting shaft 16 has a substantially quadrangular prism shape and is connected to the latch lock device 2. Further, the handle device 15 includes a pair of receiving seats 17 and 17 that receive the rotation bases of the pair of levers 18 and 18 and are respectively attached to the front and back surfaces of the door body 10.

The latch lock device 2 includes a latch case 20 as a lock body and a latch portion 30 accommodated in the latch case 20. The latch part 30 is inserted into a latch receiving recess 7a provided on the door-end side vertical frame (door frame) 6 and protrudes to restrict the closed state of the door 1 (see FIGS. 2B and 5B). ) And an immersive position (see FIG. 3) at which the door 1 can be opened, and can be displaced along the width direction of the door 1.
The latch lock device 2 is connected to a biasing member 29 that biases the latch portion 30 in the projecting direction, and the levers 18 and 18 of the door 1, and in conjunction with the operation of the levers 18 and 18, And an actuating portion 26 that displaces the latch portion 30 to the immersive position against an urging force. In addition, the latch lock device 2 includes a handle return biasing member 27 that biases the levers 18 and 18 that are rotated in a direction that allows the door 1 to be opened (unlocking direction) in a direction that restores the normal state. I have. Further, the latch lock device 2 includes a stopper portion 25 that restricts the rotation of the levers 18 and 18 in the normal state in the anti-unlocking direction. The stopper portion 25 also functions as a stopper that restricts the movement of the latch portion 30 at the protruding position toward the front side in the protruding direction.

  As shown in FIG. 1A, FIG. 2B, and FIG. 3A, the latch case 20 includes a case body 23 that has a box shape that accommodates each part and each member, and the door tip of the door body 10. And a cover plate 21 arranged substantially flush with the side end face 12. The latch case 20 is housed in the latch housing recess of the door body 10, and the door end side end of the door body 10 by a stopper such as a screw inserted through a stopper insertion hole or the like provided in the cover plate 21. It is fixed to the part 11. The plate-like portion provided on the door end side of the case body 23 and the cover plate 21 are provided with a latch insertion hole 22 through which the leading end portion of the latch portion 30 in the protruding direction is inserted.

The latch portion 30 includes a latch head (latch head) 31 that is projected and retracted through the latch insertion hole 22 of the latch case 20, and a latch shaft (rod) 32 that is coupled to the base end side in the protruding direction of the latch head 31. And.
As shown in FIGS. 2B and 5B, the latch head 31 protrudes greatly from the door end side end surface 12 of the door body 10 in a state where the latch portion 30 is in the protruding position. The projecting dimension of the latch head 31 from the door end side end surface 12 at this projecting position is the projecting position and is inserted into the latch receiving recess 7a of the door end side vertical frame 6, and the closed state of the door 1 is regulated. It is sufficient to make the dimensions possible. This projecting dimension includes the clearance between the door 1 and the door-end side vertical frame 6 provided to enable the door 1 to be opened and closed smoothly, and processing errors and construction errors of the door 1 and the door-end side vertical frame 6. It may be set as appropriate in consideration. For example, the protruding dimension may be about 10 mm to 20 mm.
On the other hand, as shown in FIG. 3, the latch head 31 is substantially entirely accommodated in the latch case 20 in a state where the latch portion 30 is in the immersive position, and substantially protrudes from the door end side end surface 12 of the door body 10. It is not in the state.

Further, as shown in FIG. 5B, the latch head 31 is substantially flat with the front side surface of the door 1 in the opening direction (the front side surface in the closed state of the door 1) substantially parallel to the front and back surfaces of the door body 10. It is made into a proper locking surface. When the door 1 is in the closed state and the latch head 31 is in the protruding position and is inserted into the latch receiving recess 7a of the door end side vertical frame 6, the latching surface of the latch head 31 is the latch receiving recess 7a. The closed state of the door 1 is regulated in proximity to or in contact with the inner wall.
In addition, the latch head 31 has a guide surface (sliding) that is inclined or curved toward the locking surface side as the rear side surface of the door 1 in the opening direction (the back side surface in the closed state of the door 1) goes outward in the width direction of the door 1. Surface). When the door 1 is changed from the open state to the closed state with the latch head 31 protruding, the guide surface of the latch head 31 is the front side edge of the door-end side vertical frame 6 (in the illustrated example, the latch It contacts the curved guide portion 7b) of the receiver 7. Then, with further movement of the door 1 in the closing direction, the latch head 31 is pushed in by the mutual guide action of the guide surface of the latch head 31 and the curved guide portion 7b of the latch receiver 7. Displace to the side. The latch head 31 (latch portion 30) may be rotatable so that the latching surface of the latch head 31 and the guide surface can be reversed according to the left and right side of the door 1.

As shown in FIGS. 1A, 2B, and 3A, the latch shaft 32 has a long bar shape in the protruding and retracting direction of the latch head 31, and is provided in the latch case 20. It is inserted through the bearing portion 24. The latch portion 30 is supported by the latch bearing portion 24 and the latch insertion hole 22 so as to be displaceable along the width direction of the door 1 with respect to the latch case 20.
Further, in this embodiment, the biasing member 29 that biases the latch portion 30 in the protruding direction is attached to the latch shaft 32 and includes a compression coil spring that is expanded and contracted in the protruding and retracting direction of the latch portion 30. The spring 29 is used. One end of the latch portion biasing spring 29 (the end portion on the proximal end side in the protruding direction of the latch portion 30) abuts on the latch bearing portion 24 and moves inward (to the width direction center side of the door 1). Is regulated. In addition, the other end of the latch portion biasing spring 29 (the end portion on the distal side in the protruding direction of the latch portion 30) abuts on the base end portion of the latch head 31, and the latch portion 30 is always biased in the protruding direction. doing.

An actuated portion 33 that is engaged with an actuating portion 26 provided on the latch case 20 is provided at the base end portion of the latch shaft 32. In the illustrated example, the actuated portion 33 is a disc-shaped flange portion 33.
In this embodiment, the actuating portion 26 is provided with a square hole that is inserted so that the connecting shaft 16 of the handle device 15 is fitted, and is a hub 26 that rotates in conjunction with the rotation of the connecting shaft 16. Yes. The hub 26 is provided with an arm-shaped first operating piece 26a that protrudes generally upward (latch shaft 32 side) when the levers 18 and 18 of the handle device 15 are not operated, and generally downward. An arm-shaped second operating piece 26b that protrudes toward the outside is provided. The first operating piece 26a and the second operating piece 26b move along the direction in which the latch portion 30 protrudes and retracts with the rotation of the hub 26 (see FIGS. 2B and 3A). ).

  The projecting direction tip of the first operating piece 26 a of the hub 26 is divided into two forks so as to receive the latch shaft 32. As the first operating piece 26a moves to the immersive side (the center side in the width direction of the door 1), as shown in FIG. 3A, the hook of the latch shaft 32 engaged with the first operating piece 26a. The part 33 moves to the immersive side, and the latch part 30 is set to the immersive position. That is, the hub 26 displaces the latch portion 30 to the retracted position against the biasing force of the latch portion biasing spring 29 in conjunction with the operation of the levers 18 of the handle device 15. Regardless of the rotation of the hub 26, the latch portion 30 is provided with an external force in the immersion direction (pushing with fingers or a reaction force due to the curved guide portion 7b of the latch receiver 7). Displacement to the immersion position side is possible against the urging force of the latch portion urging spring 29.

The second operating piece 26 b of the hub 26 is urged toward the immersive side (the center side in the width direction of the door 1) by a handle return urging member 27. In the present embodiment, the handle return urging member 27 is a handle return urging spring 27 formed of a compression coil spring or the like that expands and contracts along the same direction as the protruding and retracting direction of the latch portion 30 at the bottom of the latch case 20. Further, the grip return urging spring 27 is covered with a slide body 28 that is slidable in the same direction as the protruding and retracting direction of the latch portion 30 at the bottom of the latch case 20.
One end of the handle return biasing spring 27 (the end on the leading end side in the protruding direction of the latch portion 30) abuts on a plate-like portion provided on the door tip side of the case body 23 of the latch case 20, and is on the leading end side. Movement to the (outer side in the width direction of the door 1) is restricted. The other end of the grip return biasing spring 27 (the end on the base end side in the protruding direction of the latch portion 30) abuts on the base end of the slide body 28, so that the slide body 28 is always attached to the latch portion 30. It is energizing in the same direction as the immersion direction. The second operating piece 26 b of the hub 26 is in contact with the slide body 28, and the second operating piece 26 b is urged toward the immersive side by the handle return urging spring 27 via the slide body 28. The hub 26 is urged by a handle return urging spring 27 through the second operating piece 26b so as to turn the levers 18 and 18 turned in the unlocking direction in a direction to return to the normal state. ing.

  Further, as shown in FIG. 2B, a stopper portion 25 is provided so as to restrict the further movement of the second working piece 26b of the hub 26 biased toward the immersive side as described above to the immersive side. ing. When the second operating piece 26b of the hub 26 comes into contact with the stopper portion 25 and is regulated, the rotation of the levers 18 and 18 in the normal state in the anti-unlocking direction side is regulated. Further, when the second operating piece 26b of the hub 26 is in contact with the stopper portion 25 and the latch portion 30 is in the protruding position, the flange portion 33 of the latch shaft 32 is formed on the first operating piece 26a of the hub 26. , And the movement of the latch portion 30 in the protruding position toward the front side in the protruding direction is restricted.

In addition, as shown in FIG. 1, the latch lock device 2 displaces the latch portion 30 toward the immersive position and the protruding position every time the latch portion 30 is displaced toward the immersive position and the restriction on the immersive position is released. A latch position restricting portion 34 that is alternately switched between a state in which it is held at a small protruding position between and a state in which it can be displaced toward the protruding position.
When the levers 18 and 18 of the handle device 15 are operated in the unlocking direction, as described above, the hub 26 is rotated in conjunction with this, and as shown in FIG. Is restricted to the immersive position. If the levers 18 and 18 are operated in the anti-unlocking direction or the levers 18 and 18 are released in the state where the latch part 30 is in the immersive position, that is, if the restriction on the immersive position side is released, the latch part urging spring 29 The latch part 30 is displaced toward the protruding position side.

Alternatively, as shown in FIG. 2 (a), the latch head 31 of the latch portion 30 is immersed by a reaction force by the curved guide portion 7b of the latch receiver 7 or by pushing with a finger. Displacement toward the position side. When the reaction force by the curved guide portion 7b and the pushing by the finger are unloaded, that is, when the restriction at the immersive position side is released, the latch portion urging spring 29 urges the latch portion 30 toward the protruding position side. To displace.
The latch position restricting portion 34 is configured to be alternately switched between a state in which the latch portion 30 that is displaced toward the protruding position side is held at the small protruding position and a state in which the latch portion 30 can be displaced toward the protruding position. In other words, each time the latch unit 30 is displaced toward the immersive position and the restriction on the immersive position is released, the latch unit 30 is alternately held at the small protruding position and held at the protruding position. It will be.

  If the protrusion dimension from the door-end side end surface 12 of the latch head 31 of the latch part 30 in the small protrusion position is a dimension smaller than the protrusion dimension from the door-end side end face 12 of the latch head 31 in the protrusion position. Good. Further, the projecting dimension of the latch head 31 at this small projecting position is such that when the door 1 is changed from the open state to the closed state, it contacts the curved guide portion 7b of the latch receiver 7 as described above. It is good also as a dimension which the latch head 31 can displace to the immersive position side by a predetermined amount by mutual guide action with 7b. For example, the protrusion dimension from the door-end side end surface 12 of the latch head 31 at the small protrusion position may be about 1/4 to 3/4 of the protrusion dimension from the door-end side end face 12 of the latch head 31 at the protrusion position. Good. In FIG. 1, the latch head 31 in the protruding position is shown by a two-dot chain line, and the protruding dimension from the door end side surface 12 of the latch head 31 in the small protruding position is the latch head in the protruding position. The example which made about 1/2 the protrusion dimension from the door end side end surface 12 of the part 31 is shown.

According to the latch lock device 2 and the door 1 having the same according to the present embodiment configured as described above, the latch portion 30 (latch head) in the opened state of the door 1 can be controlled while the closed state of the door 1 is possible. The protruding amount of the part 31) can be reduced.
That is, since the latch portion 30 that is displaced to the protruding position after the restriction of the immersion position by the operating portion (hub) 26 is released can be held at the small protruding position, the protruding amount of the latch head 31 in the opened state of the door 1 Can be reduced. In other words, the immersion position is normally regulated by the hub 26 by operating the levers 18 and 18 in the unlocking direction when the latch portion 30 is in the protruding position and the closed door 1 is opened. The Therefore, after the door 1 is opened, the levers 18 and 18 are operated in the anti-unlocking direction or the levers 18 and 18 are released, and the restriction of the immersion position by the hub 26 is released in conjunction therewith. Thereby, although the latch part 30 is displaced toward the protrusion position side, this latch part 30 can be hold | maintained in a small protrusion position. Thus, since the protrusion amount of the latch head 31 in the opened state of the door 1 can be reduced, the latch head 31 gets in the way when the door 1 is opened, or a load or the like is caught on the latch head 31. Can be suppressed.

  Further, when the latch part 30 is displaced to the immersive position side at this small protruding position and the restriction on the immersive position side is released, the latch part 30 becomes the protruding position. As shown in FIG. 1B and FIG. 2A, the door portion side vertical frame 6 is accompanied by the movement of the latch portion 30 held at the small protruding position in the opened state of the door 1 in the closing direction of the door 1. It is displaced to the immersive position side by being pushed in contact with the curved guide portion 7b of the latch receiver 7 of the above. And if the latch head 31 of the latch part 30 reaches the latch receiving recessed part 7a of the latch receiver 7 with the further movement to the closing direction of the door 1, there will be no restrictions by the curved guide part 7b, ie, an immersion position. The restriction on the side is released. Thereby, the latch part 30 becomes a protrusion position, is inserted in the latch receiving recessed part 7a, and can regulate the closed state of the door 1. Alternatively, when the latch 30 is held at the small protruding position in the opened state of the door 1, the levers 18 and 18 are operated to bring the latch 30 into the immersive position, and the door 1 is closed. When the restriction on the immersion position side is released, the latch portion 30 becomes the protruding position.

That is, according to the present embodiment, the amount of protrusion of the latch head 31 when the door 1 is open can be reduced, but the amount of the latch head 31 to be latched to the latch receiving recess 7a is reduced. Therefore, the closed state of the door 1 can be regulated relatively reliably.
Further, since the protruding amount of the latch head 31 in the opened state of the door 1 can be reduced in this way, it is also possible to reduce the protruding dimension or guide surface of the latch receiving member 7 toward the front side of the curved guide portion 7b. It becomes possible.
In addition, when the latch part 30 becomes a protrusion position in the open state of the door 1, the latch part 30 is displaced to the immersive position side and the restriction on the immersive position side is released, so that the latch part 30 is It can be a small protruding position.

Next, an example of a specific configuration of the latch position restricting portion 34 will be described with reference to FIG.
The latch position restricting portion 34 according to this example is provided on the latch portion 30 side, and is provided on the shaft-like portion 35 whose axial direction is along the protruding direction of the latch portion 30 and on the latch case 20 side. 35 (see FIG. 1A, FIG. 2B and FIG. 3A).
The shaft-shaped portion 35 has a substantially columnar shape, and a tip portion (end portion on the tip side in the protruding direction of the latch portion 30) 35 a rotates around the axis with respect to the flange portion 33 of the latch shaft 32 of the latch portion 30. It is connected freely. For example, the shaft portion 35 and the flange portion 33 may be connected by a rolling bearing or the like.
As shown in FIG. 4, a locking projection 36 is provided on the outer peripheral surface of the shaft-like portion 35. The locking protrusion 36 is elongated along the axial direction of the shaft-like portion 35.

The cylindrical portion 37 has a hollow portion that can receive the shaft-shaped portion 35, and is fixedly provided in the latch case 20.
On the inner peripheral surface of the cylindrical portion 37, a locking projection holding portion 38 is provided. The locking projection holding portion 38 receives the short recess groove 38b that holds the latch portion 30 in the small protruding position by the locking projection 36 of the shaft-like portion 35 and the locking projection 36, and moves the latch portion 30 to the protruding position. The long concave grooves 38d that can be displaced toward the center are alternately provided along the circumferential direction. Further, a guide tooth-like portion 39 is provided on the inner peripheral surface of the cylindrical portion 37 to guide the locking projection 36 and rotate the shaft-like portion 35 in accordance with the displacement of the latch portion 30 toward the immersion position. Yes. The guide tooth portion 39 is alternately positioned at a position where the latch protrusion 30 can be latched with the short groove 38b and a position where the latch groove 30d can be received every time the latch portion 30 is displaced toward the retracted position. It is supposed to be configured. The locking protrusion holding portion 38 is provided on the distal end side (the distal end side in the protruding direction of the latch portion 30) of the cylindrical portion 37, and the guide tooth portion 39 is disposed on the proximal end side (the protruding portion of the latch portion 30). It is provided on the direction base end side). The locking projection 36 of the shaft-shaped portion 35 is positioned between the locking projection holding portion 38 and the guide tooth-shaped portion 39.

  The guide tooth portion 39 is inclined so that the base end portion (end portion on the base end side in the protruding direction of the latch portion 30) 36b of the locking projection 36 of the shaft portion 35 abuts and guides the base end portion 36b. A formed guide portion 39a is provided. The base portion 36b of the locking projection 36 of the shaft-shaped portion 35 is guided by the guide tooth-shaped portion 39 by moving the shaft-shaped portion 35 toward the immersive position side with the displacement of the latch portion 30 toward the immersive position. Guided by the portion 39a, the locking projection 36 moves and the shaft-like portion 35 rotates in one direction. The base end portion 36 b of the locking projection 36 of the shaft-like portion 35 is inclined according to the inclined shape of the guide portion 39 a so that it is smoothly guided by the guide portion 39 a of the guide tooth-like portion 39. (Refer FIG.4 (d)). Further, the guide portion 39a of the guide tooth-like portion 39 is configured to be able to receive the locking projection 36 of the shaft-like portion 35 located on the immersive side in a state where the latch portion 30 is in the immersive position (FIG. 4). (See (b)).

Further, the guide tooth-like portion 39 includes a restricting portion 39b that restricts the locking protrusion 36 that moves while being guided by the guide portion 39a to a predetermined position. As shown in FIG. 4D, the restricting portion 39b is provided so as to substantially coincide with the short concave groove 38b and the long concave groove 38d of the locking projection holding portion 38 in the axial direction.
The guide tooth portion 39 has a sawtooth shape having these guide portions 39a and restricting portions 39b alternately along the circumferential direction. Further, the guide portion 39a and the restricting portion 39b can rotate the shaft-like portion 35 in one direction each time the latch portion 30 is displaced toward the immersing position, and can lock the locking projection 36 in the short groove 38b. These are formed so as to be alternately positioned at a position that can be received in the long concave groove 38d (see FIG. 4D).

The short concave groove 38 b of the locking projection holding portion 38 is formed relatively short (shallow) along the axial direction of the shaft-like portion 35. The front end of the locking projection 36 of the shaft-like portion 35 (the end on the front end side in the protruding direction of the latch portion 30) 36a abuts on the short concave groove 38b, and the locking projection 36 is locked. 30 is held at the small protruding position (see FIGS. 1A and 4A). The depth along the axial direction of the short concave groove 38b is appropriately set so that the latch portion 30 is in a small protruding position in a state where the locking projection 36 of the shaft-like portion 35 is locked to the short concave groove 38b. You just have to do it.
The long concave groove 38 d of the locking projection holding portion 38 is formed longer (deeper) than the short concave groove 38 b along the axial direction of the shaft-like portion 35. The latching protrusion 36 of the shaft-like portion 35 is received in the long concave groove 38d, and the latch portion 30 can be displaced toward the protruding position (see FIGS. 2B and 4C). The depth along the axial direction of the long concave groove 38d is appropriately set so that the latch portion 30 is in the protruding position in a state where the locking projection 36 of the shaft-like portion 35 is received in the long concave groove 38d. You can do it. In the example shown in the figure, the distal end portion 36a of the locking projection 36 of the shaft-like portion 35 is brought into contact with the groove bottom of the long groove 38d so that the locking projection 36 can be locked. The long concave groove 38d may be deepened so that the distal end portion 36a does not contact the groove bottom of the long concave groove 38d.

Moreover, the latching protrusion holding | maintenance part 38 is provided with the short concave groove side guide part 38a and the long concave groove side guide part 38c which guide the latching protrusion 36 of the shaft-shaped part 35 in this example.
The short groove side guide portion 38a has an inclined shape that guides the distal end portion 36a of the locking projection 36 toward the short groove 38b. In the illustrated example, the short groove-side guide portion 38a is curved.
The long concave groove side guide portion 38c has an inclined shape that guides the distal end portion 36a of the locking projection 36 toward the long concave groove 38d.
The distal end portion 36a of the locking projection 36 of the shaft-like portion 35 is guided by the short groove-side guide portion 38a and the long groove-side guide portion 38a so as to be smoothly guided by the short groove-side guide portion 38a and the long groove-side guide portion 38c. It is set as the inclination shape according to the inclination shape of the ditch | groove side guide part 38c (refer FIG.4 (d)).

  By providing the short groove side guide part 38a and the long groove side guide part 38c as described above, the latch protrusion 30 is engaged with the short groove 38b each time the latch part 30 is displaced to the retracted position side. Stopping and receiving into the long concave groove 38d are alternately performed relatively reliably. That is, even when the displacement of the latch portion 30 toward the immersion position is relatively small and the locking protrusion 36 of the shaft-like portion 35 is guided only to the front of the restricting portion 39b of the guide tooth-like portion 39, the latch The locking protrusion 36 that has moved to the locking protrusion holding portion 38 as the portion 30 is displaced toward the protruding position can be guided by the short groove-side guide portion 38a or the long groove-side guide portion 38c. , Can be engaged with the short concave groove 38b or received by the long concave groove 38d.

The latch position restricting portion 34 configured as described above operates as follows.
As shown in FIGS. 1, 4 (a) and 4 (d), when the latch portion 30 is in the small protruding position, the locking protrusion 36 of the shaft-shaped portion 35 is the locking protrusion of the cylindrical portion 37. It is in a state of being locked in the short concave groove 38 b of the holding portion 38. In this state, if the reaction force by the curved guide portion 7b of the latch receiving member 7 or the pushing by the finger is applied, or if the latch portion 30 is displaced to the immersive position side by the rotation of the lever 18, the two in FIG. As indicated by the dotted line, the locking projection 36 of the shaft-like portion 35 moves toward the guide tooth-like portion 39 of the cylindrical portion 37. Then, as shown in FIG. 4B, the locking projection 36 is guided by the guide portion 39a of the guide tooth-shaped portion 39, the shaft-shaped portion 35 rotates in one direction, and the locking projection 36 becomes the locking projection. It becomes a position which can be received in the long concave groove 38d of the holding portion 38. Then, when the reaction force by the curved guide portion 7b of the latch receiver 7 and the pushing by the fingers are unloaded, or the lever 18 is released and the restriction on the immersive position side of the latch portion 30 is released, the latch portion 30 protrudes. Displacement toward the position side. As the latch portion 30 is displaced, the locking projection 36 of the shaft-like portion 35 moves toward the locking projection holding portion 38 and is received in the long concave groove 38d of the locking projection holding portion 38. It becomes the protruding position.

  Further, with the latch part 30 in the protruding position in this way, the latch part 30 is immersed by the reaction of the curved guide part 7b of the latch receiving member 7 or the pushing force by the fingers by turning the lever 18. When displaced to the position side, the locking projection 36 of the shaft-like portion 35 moves toward the guide tooth-like portion 39 of the cylindrical portion 37 (see FIG. 4D) as described above. Similarly to the above, the locking projection 36 is guided by the guide portion 39 a of the guide tooth-shaped portion 39, the shaft-shaped portion 35 rotates in one direction, and the locking projection 36 is a short concave groove 38 b of the locking projection holding portion 38. It becomes a position which can be locked to. When the lever 18 is released or the reaction force by the curved guide portion 7b of the latch receiver 7 or the pushing by the finger is unloaded and the restriction on the immersive position side of the latch portion 30 is released, the latch portion 30 is Displacement toward the protruding position. With the displacement of the latch portion 30, the locking projection 36 of the shaft-like portion 35 moves toward the locking projection holding portion 38, and is locked in the short concave groove 38 b of the locking projection holding portion 38. Becomes a small protruding position. In this way, the latch position restricting portion 34 protrudes from the state in which the latch portion 30 is displaced toward the immersive position and the latch portion 30 is held at the small protruding position each time the restriction on the immersive position is released. It is alternately switched to a state where it can be displaced toward the position. Further, as a result, the latch unit 30 is displaced between the small protruding position and the protruding position each time the latch unit 30 is displaced toward the immersive position and the restriction on the immersive position is released. Will be made.

  According to the above-described example, the latch position restricting portion 34 includes the shaft-shaped portion 35 whose axial direction is along the protruding direction of the latch portion 30 and the cylindrical portion 37 that receives the shaft-shaped portion 35. Therefore, the latch position restricting portion 34 can be made compact. For example, by swinging the arm-shaped member or by rotating a disk-shaped cam whose rotation axis direction is along the thickness direction of the door 1, the state in which the small protruding position is maintained and the protruding position are directed. Compared with a case where switching to a displaceable state is possible, downsizing can be achieved. In particular, the latch lock device may house components of a lock mechanism such as a display lock and a dead bolt (thumb turn lock) in the latch case, and in such a case, a housing space for these may be required. Many. According to the said structure, it becomes a suitable thing, without hindering the accommodation space of these structural members so much.

In the above-described example, an example in which the single locking protrusion 36 is provided on the shaft-like portion 35 is shown, but a plurality of locking protrusions may be provided at intervals along the circumferential direction. .
Further, as described above, the embodiment is not limited to a mode in which the shaft portion 35 is rotatably connected to the latch shaft 32 of the latch portion 30 and the cylindrical portion 37 is fixedly provided on the latch case 20. For example, the shaft-like portion 35 may be fixedly provided on the latch portion 30 and the cylindrical portion 37 may be provided so as to be rotatable with respect to the latch case 20.
Further, as described above, the embodiment is not limited to the aspect in which the shaft-like portion 35 is provided on the latch portion 30 side and the cylindrical portion 37 is provided on the latch case 20 side. For example, the shaft portion 35 may be provided on the latch case 20 side, and the cylindrical portion 37 may be provided on the latch portion 30 side.

Further, the present invention is not limited to the aspect in which the locking protrusion 36 is provided on the outer peripheral surface of the shaft-like portion 35 and the locking protrusion holding portion 38 and the guide tooth-like portion 39 are provided on the inner peripheral surface of the cylindrical portion 37 as described above. For example, the locking protrusion holding portion 38 and the guide tooth-shaped portion 39 may be provided on the outer peripheral surface of the shaft-shaped portion 35, and the locking protrusion 36 may be provided on the inner peripheral surface of the cylindrical portion 37.
Moreover, the latching protrusion holding | maintenance part 38 and the guide tooth-like part 39 are not restricted to the aspect provided in a single member. For example, it is good also as an aspect which each comprises these with an individual member.
Further, the present invention is not limited to the aspect in which the shaft-like portion 35 (or the tubular portion 37) is provided at the base end portion of the latch shaft 32 as described above. For example, the shaft-like portion 35 (or the cylindrical portion 37) may be provided between the latch head portion 31 and the latch bearing portion 24, or between the latch bearing portion 24 and the flange portion 33. Good.
In addition, the above-described latch position restricting portion 34 is an example, and various modifications can be made.

  Further, the latch position restricting portion 34 is not limited to a mechanism employed in the so-called knock type pen as described above. For example, a locking claw and a locking recess that lock each other at the small protruding position are provided, and each time the latch portion is displaced to the immersive position side and the restriction on the immersive position side is released, the locking recess of the locking claw You may make it employ | adopt the mechanism provided with the interlocking arm, the interlocking cam, etc. which can be switched between the latching state and the cancellation | release. Further, a push-latch retracting mechanism (push / push mechanism) employed in a push-open door or the like may be employed as the latch position restricting portion 34.

Moreover, in this embodiment, although the latch locking apparatus 2 by which the unlocking direction was made only into one direction was illustrated, it is not restricted to such an aspect. It is good also as an aspect which makes unlocking possible even if the levers 18 and 18 made into the normal state are rotated to which side. In the present embodiment, the handle of the door 1 is shown as levers 18 and 18, but a round knob (handball) that is operated to rotate, or a push that is operated to push or pull is used. A handle, a pull handle, or a push-pull handle may be used. In these cases, the operation portion (hub) 26, the engagement mode between the operation portion 26 and the latch portion 30 and the like may be appropriately modified as necessary.
Further, in the present embodiment, an example in which the latch lock device 2 is an empty lock is shown, but a lock mechanism such as a display lock or a dead bolt (thumbturn lock) may be provided.
Moreover, in this embodiment, although the door 1 in which the latch lock apparatus 2 is integrated is shown as the fitting which opens and closes the entrance / exit 3, it is good also as doors, such as storage furniture.

1 door 10 door 11 door end side 18 lever (grip)
2 Latch locking device 20 Latch case 26 Hub (actuating part)
29 Latch part biasing spring (biasing member)
30 Latch part 34 Latch position restricting part 35 Shaft part 36 Locking protrusion 37 Tubular part 38 Locking protrusion holding part 38b Short groove 38d Long groove 39 Guide tooth part 6 Door side vertical frame (door frame)
7a Latch receiving recess (latch receiving)

Claims (3)

A latch part that is displaceable along the width direction of the door between a protruding position that is inserted into a latch receiver provided on the door frame and restricts the closed state of the door and an immersion position that allows the door to be opened. When,
A biasing member that biases the latch portion in the protruding direction;
An operating portion connected to the handle of the door, and displacing the latch portion to the retracted position against the biasing force of the biasing member in conjunction with the operation of the handle;
Each time the latch portion is displaced toward the immersive position and the restriction on the immersive position is released, the latch portion is held at a small protruding position between the immersive position and the protruding position; A latch position restricting portion that is alternately switched to a state that allows displacement toward the protruding position;
A latch locking device comprising: In claim 1,
The latch position restricting portion is provided on one side of the latch portion and a latch case that accommodates the latch portion, and is provided on the other side and a shaft-like portion whose axial direction is along the protruding direction of the latch portion, A cylindrical portion that receives the shaft-like portion, and a locking projection is provided on one of the outer peripheral surface of the shaft-shaped portion and the inner peripheral surface of the cylindrical portion, and the locking projection is provided on the other side. A short concave groove that holds the latch portion at the small protruding position and a long concave groove that receives the locking protrusion and displaces the latch portion toward the protruding position along the circumferential direction. The locking protrusion holding portions alternately provided and the locking protrusions are guided in accordance with the displacement of the latch portion toward the immersive position, and are relatively rotated around the shaft-shaped portion. The position where the locking protrusion can be locked in the short groove and the long groove each time it is displaced toward the immersion position Latch lock apparatus characterized by guide teeth be positioned alternately and acceptable position, is provided.   It comprises a door body, a latch lock device according to claim 1 or 2 provided at a door end side end portion of the door body, and a handle connected to an operating portion of the latch lock device. Characteristic door.

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