JP2018112042A - Latch device and door device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a latch device with a structure capable of having a locking function with a simple structure.SOLUTION: A latch device 101 of a door 31 attached to a door frame 21 of a building, includes: a striker 111 provided to a door frame 21; a latch member 122 which engages with the striker 111 in a state the door 31 is closed to prevent the door from being opened; and an actuator that drives the latch member 122 in a direction where the engagement with the striker 111 is released. The latch device is configured so that the actuator is activated responding to an instruction to release the latch to drive the latch member 122 in a direction where the engagement with the striker 111 is released. Since the latch member 122 does not release the engagement with the striker unless the actuator is not driven, the latch device 101 also has a locking function. In this case, since the latch member 122 is urged in a direction where the latch member engages with the striker 111 by means of a spring force, the locking function is reliably exerted.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electric lock mounted on a door and a door device using the same.

Conventionally, a door is provided with a locking device and a latch device in order to control opening and closing thereof.
The locking device is used to lock and unlock the door, and the door can be locked and unlocked by inserting / removing a dead bolt provided in the end face of the door into a hollow striker provided on the door frame side. doing.
The dead bolt can be fixed in a position protruding from the end face of the door, and thus the door can be locked.
The latch device is for keeping the door closed, i.e., latching, and fitting a latch bolt provided on the end face of the door to a recessed striker provided on the door frame side. The door can be kept closed.
The latch bolt has a latch head that is inclined so that it abuts against the striker on the door frame side at an angle smaller than 90 degrees. Therefore, when the door is closed, the latch bolt is pushed by the striker and then retracts and jumps out. It fits into the recess of the striker due to the bias of the spring pushing in the direction. As a result, the door is latched.
Such latch bolts appear and disappear according to the operation of the operation unit, and can be released from the latch. As the operation unit, for example, an operation lever provided on the door handle is used.

The conventional door is troublesome because it requires the operation of the operation part because the door is unlatched by the operation of the operation part, and it is necessary to incorporate the operation part. There is a problem of end.
Therefore, conventionally, a door device that does not require a latch release operation when the door is opened has been proposed (see Patent Document 1).
In this door device, a hook (10) is attached in a horizontal arrangement on the door frame (1) side, and on the door (2) side, an engaging portion is engaged with and disengaged from the hook by rotating around a horizontal axis. The door catch (20) provided with (24a) is provided. The engaging part is urged by a spring, and when the door is closed, it rotates in the direction to engage with the hook and maintains the engaged state, and when the door is opened, it rotates in the direction to release the engagement with the hook and changes its state. To be maintained.
Therefore, according to the door device described in Patent Document 1, an operation for releasing the latch of the door is not necessary, and there is no troublesome operation.
Moreover, since it is not necessary to provide an operation part in a door handle, the freedom degree on the design of a door handle can be improved.

JP 2007-239235 A

The conventional door has a problem that the structure is inevitably complicated because it includes a locking device and a latch device.
This point is the same when the latch device described in Patent Document 1 is adopted, and although not described in the document, a locking device must be provided separately in order to be able to lock and unlock the door.
The present invention has been made in view of such a point, and an object thereof is to realize a latch device having a structure capable of having a locking function with a simple structure.

  The present invention relates to a door latch device that is openably and closably attached to a door frame of a building, and is engaged with a striker provided on the door frame so that the striker is detachably engaged with the door closed. A latch member for preventing the door from being opened, an actuator for driving the latch member in a direction for releasing the engagement with the striker, and operating the actuator in response to an instruction to release the latch, And a controller that drives the latch member in a direction to release the engagement.

  The door device of the present invention includes a door that can be freely opened and closed on a door frame of a building, a striker provided on the door frame, and a detachable engagement with the striker with the door closed. A latch member that prevents the door from being opened; an actuator that drives the latch member in a direction to release the engagement with the striker; and the actuator that is operated in accordance with an instruction to release the latch to engage with the striker. And a controller that drives the latch member in a direction to release the above-described problem.

  According to the present invention, since the latch member is driven by the actuator to release the engagement with the striker, the striker and the latch member can easily form the locking structure, and thus the locking function can be provided. The latch device having the structure can be realized with a simple structure.

The perspective view of a door apparatus provided with the latch apparatus which cuts and shows a door and a door frame partially as one Embodiment. The schematic diagram of the latch apparatus which partially cuts and shows a door. The perspective view which shows virtually the latch apparatus attached to the door. The longitudinal section front view of a latch device (locking state). AA line sectional view in FIG. A longitudinal front view of the latch device (unlocked and latched state). BB sectional drawing in FIG. The longitudinal cross-sectional front view of a latch apparatus (latch release state). CC sectional view taken on the line in FIG. CC sectional view taken on the line in FIG. 8 (The door is pushed a little). The schematic diagram which shows the electrical connection of each part. The flowchart which shows the flow of a process when a door is opened. The flowchart which shows the flow of a process at the time of receiving a locking signal.

Embodiments will be described with reference to the drawings.
The description will be made according to the following items.
1. Outline (1) Latch principle (2) Three modes of door device Configuration of each part (1) Door (2) Striker (3) Latch device body
(A) Latch mechanism
(B) Locking mechanism
(C) Actuator
(D) Power transmission mechanism
(E) Control unit
(F) Processing of control unit when opening door
(G) Processing of control unit when locking. Effect (1) Locking (2) Unlocking (3) Improvement of crime prevention strength (4) Simplification of structure having both latch mechanism and locking mechanism (5) Simplification of door device Modified example

1. Outline (1) Latch Principle As shown in FIGS. 1 to 3, the door device 11 of the present embodiment includes a door frame 21 and a door 31, and latches the door 31 with respect to the door frame 21. have.
The latch device 101 includes a striker 111 attached to the side of the door frame 21 and a latch device body 121 built in the door 31. The latch device body 121 has a latch member 122 that engages with the striker 111 (see FIGS. 3 to 10).
The door 31 is supported by a hinge (not shown) so that the door 31 is open and rotatable, and the position of the door 31 is restricted by a door receiver 22 provided in a step shape on the door frame 21. That is, the door receiver 22 protrudes from the door frame 21 so as to interfere with the rotation trajectory of the door 31 and receives the indoor end of the door 31.
In the door frame 21, the frame side 23 faces the end surface 31 a of the closed door 31. In the conventional latch device, a hollow striker is provided on the frame side 23, whereas in the latch device body 121 of the present embodiment, the striker 111 is attached to the end surface 22 a of the door receiver 22. . Moreover, the striker 111 has a flat plate shape and is provided so as to protrude in the opening / closing direction of the door 31, and a latch hole 112 is formed in the protruding portion. The protruding portion of the striker 111 that forms the latch hole 112 interferes with the rotation locus of the door 31.
Therefore, the door 31 interferes with the striker 111 protruding from the door receiver 22 during the rotation. Therefore, in the present embodiment, an insertion hole 102 that opens on the indoor side surface of the door 31 is provided so as to avoid interference with the striker 111. The insertion hole 102 includes an outer hole 102 a formed in the door 31 and an inner hole 102 b formed in the housing 123 of the latch device main body 121 built in the door 31.
Due to such a structure, when the door 31 is closed, the striker 111 is inserted into the insertion hole 102 to avoid interference with the door 31, and the door 31 rotates until it hits the door receiver 22. At this time, the latch hole 112 of the striker 111 is positioned inside the housing 123 of the latch device main body 121. Therefore, in the present embodiment, the latch member 122 is advanced in the direction of arrow a in FIG. 2 to be fitted into the latch hole 112, thereby establishing the engagement relationship with the striker 111 and latching the door 31. I have to. To release the latch, the latch member 122 is retracted in the direction of the arrow b in FIG. 2 so that the engagement relationship with the striker 111 can be released.
The above is the latch principle of the door 31 in the present embodiment.

(2) Three Aspects of Door Device The door device 11 of the present embodiment provides three aspects.
These are three modes: locked state, unlocked / latched state, and unlatched state.

  The locked state is a mode in which the door 31 is latched and the latched state is more reliably locked (see FIGS. 4 and 5). A latch mechanism 131 built in the latch device main body 121 latches the door 31, and a locking mechanism 151 performs locking.

  In the unlocked / latched state, the locking mechanism 151 is unlocked, but the latch mechanism 131 continues to maintain the latched state of the door 31 (see FIGS. 6 and 7).

  The latch release state is a mode in which the lock mechanism 151 releases the lock, and the latch mechanism 131 also releases the latch state of the door 31 (see FIGS. 8 to 10).

2. Configuration of Each Unit The configuration of each unit will be described.

(1) Door Handles are attached to the door 31 on the indoor side and the outdoor side, respectively. The indoor handle 32 is attached to the indoor side, and the outdoor handle 33 is attached to the outdoor side (see also FIG. 11).
Both the indoor handle 32 and the outdoor handle 33 are fixed handles that are long in the vertical direction, and do not have a movable part for opening and closing the door 31.
As shown in FIGS. 1 and 11, the indoor handle 32 includes a fixed portion 32 a that is fixed to the door 31 and a handle portion 32 b into which a finger can be inserted between the door 31.
As shown in FIG. 11, the outdoor handle 33 includes a pair of fixing portions 33 a fixed to the door 31 at the upper and lower ends, and a finger can be inserted between the fixing portion 33 a and the door 31. It has a handle portion 33b.

Although details will be described later, the indoor handle 32 has a battery EB detachably incorporated therein. The battery EB serves as a power source that supplies power to the actuator 201 and the control unit 211 built in the latch device body 121 (see FIG. 11).
In addition, an electrostatic switch ES1 is incorporated in the indoor handle 32, and an electrostatic switch ES2 is incorporated in the outdoor handle 33 (see FIG. 11). The electrostatic switch ES1 detects that the hand is touched by the indoor handle 32, and the electrostatic switch ES2 detects that the hand is touched by the outdoor handle 33.

(2) Striker The striker 111 has a cover 113.
The cover 113 is attached to the striker 111 so as to be slidable in the horizontal direction, and is normally urged toward the distal end direction of the striker 111 protruding from the door receiver 22 and covers the distal end portion.
In the process of closing the door 31, the cover 113 is pushed by the surface on the indoor side of the door 31 and retracts to the attachment position (position shown in FIGS. 1 and 2) with the striker 111 with respect to the end surface 22 a of the door receiver 22. When the door 31 is opened, the cover 113 slides again to a position that covers the tip of the striker 111 again.

  1 and 2, the cover 113 is positioned in a retracted position, but this shows an imaginary situation for showing the shape of the striker 111 having the latch hole 112, and actually the door 31 is When open, the cover 113 covers the tip of the striker 111.

(3) Latch Device Main Body The latch device main body 121 is obtained by housing each part in a housing 123 in which a flat decorative plate 124 is fixed on one side surface.
As shown in FIG. 3, the latch device main body 121 is inserted into a storage portion (not shown) opened on the end surface 31a of the door 31, and fixed with the decorative plate 124 positioned in the same plane as the end surface 31a. Is done.
Each part accommodated in the housing 123 is connected to the latch mechanism 131 and the locking mechanism 151 including the latch member 122, the actuator 201 and the control unit 211, and the hub 125 to which the thumb turn and the key unit (not shown) are attached. The power transmission mechanism 171 transmits the power of the actuator 201 to the latch mechanism 131 and the locking mechanism 151.
Hereinafter, each unit will be described with reference to FIGS.

(A) Latch mechanism The latch mechanism 131 is a mechanism for latching the door 31 by fitting the tip of the latch member 122 into the latch hole 112 of the striker 111.

Inside the housing 123, the latch member 122 is slidably supported by the latch rail 132, and is movable in the horizontal direction so as to cross the inner hole 102b of the insertion hole 102 into which the striker 111 is inserted.
Such a latch member 122 has a structure in which a latch head 134 is rotatably attached to a distal end portion of a latch bolt 133 that is slidably supported on the latch rail 132. The latch head 134 is rotatably supported by a vertically arranged support shaft 135, and its rotation range is restricted to a range of 45 degrees.

Such a latch head 134 has an entry surface 136 and a retraction surface 137.
The entry surface 136 is a surface that is pushed by the tip of the striker 111 that is inserted into the insertion hole 102 and enters the inside of the latch device main body 121 when the door 31 is closed. The entrance surface 136 is inclined at an angle of 45 degrees with respect to the traveling direction of the striker 111 inserted into the insertion hole 102 (see FIG. 7).
The retracting surface 137 is a surface that is pushed by the edge portion on the side of the latch hole 112 of the striker 111 that is removed from the insertion hole 102 when the door 31 is opened. At this time, on the condition that the latch member 122 is retracted (see FIG. 9), the latch head 134 is pushed and rotated by the edge on the latch hole 112 side, and the retracting surface 137 is released from the insertion hole 102. The striker 111 is inclined at an angle of 45 degrees with respect to the retracting direction of the striker 111 (see FIG. 10).
The reason why the entry surface 136 and the retracting surface 137 are inclined at an angle of 45 degrees with respect to the striker 111 is to slide the latch member 122 in the backward direction when pushed by the striker 111.

The latch member 122 is slid to be inserted into the insertion hole 102 to be engaged with the latch hole 112 of the striker 111 that enters the inside of the latch device main body 121 (see FIGS. 4 to 7), and the latch. It is positioned at two positions, a latch release position (see FIGS. 8 to 10) that can release the fitting state with the hole 112.
The housing 123 is provided with a rotation preventing member 138 that prevents the latch head 134 from rotating when the latch member 122 is positioned at the latch position.
The rotation preventing member 138 has a stepped shape arranged on the rotation locus of the latch head 134 located at the latch position.

A pressed part 139 is fixed to the latch bolt 133.
The pressed portion 139 is a member protruding in a direction orthogonal to the sliding movement direction of the latch member 122. When the latch member 122 is slid from the latch position to the latch release position, a pressing pin 172 (FIG. 4, FIG. 6, see FIG. 8).

One end of the torsion spring 140 is fixed to the housing 123, and the other end of the torsion spring 140 is connected to the connecting piece 152 a of the movement preventing member 152.
When the latch device 101 is in the locked state (see FIG. 4), the torsion spring 140 urges the latch member 122 in the protruding direction (left direction in the drawing), and is opposite in the unlocked and latched state shown in FIG. Then, the latch member 122 is urged in the direction in which the latch member 122 is inserted (the right direction in the drawing). In the unlocked / latch state, the connecting pin 173 connected to the connecting groove 154 falls off the connecting groove 154 of the movement preventing member 152 as described later. Therefore, the urging force of the torsion spring 140 is not applied to the hub 125 between the unlocked / latch state (see FIG. 6) and the latched unlocked state (see FIG. 8).
Inside the latch member 122 is housed a spring SP whose one end is pressed against the wall surface of the latch member 122 and whose other end urges the latch bolt 133 in a protruding direction. For this reason, the latch bolt 133 is urged in the protruding direction (left direction in the drawing) by the urging force of the spring SP.
For this reason, when the latch device 101 is in the unlocked / latched state, a pressing pin 172 of a power transmission piece 176 described later is in contact with the pressed portion 139 of the latch member 122. Therefore, the latch bolt 133 that transitions from the unlocked / latched state (see FIG. 6) to the latched unlocked state (see FIG. 8) resists the urging force of the spring SP, and therefore protrudes in the latched unlocked state. It is energized (to the left in the drawing). Further, the hub 125 is urged clockwise by a pressing pin 172 that contacts the pressed portion 139.

(B) Locking mechanism The locking mechanism 151 is a mechanism for reliably positioning the latch member 122 at the latch position.
As shown in FIGS. 5, 7, 9, and 10, in the latch member 122, the latch head 134 is in contact with the bottom surface of the housing 123, whereas the latch bolt 133 is more than the bottom surface of the housing 123. It is placed at a high position. Therefore, a gap is formed between the bottom surface of the housing 123 and the latch bolt 133, and a movement preventing member 152 is provided in this gap.
The movement prevention member 152 is a T-shaped flat plate-like member, and is rotatably attached to the bottom surface of the housing 123 by a support pin 153 at a position of an intersecting region between two orthogonal pieces. Here, for convenience of explanation, one piece of the movement preventing member 152 is called a connecting piece 152a, and a piece extending in the orthogonal direction from the central portion of the connecting piece 152a is called a position restricting piece 152b.
The position restricting piece 152b of the movement preventing member 152 has its front end opposed to the rear end portion of the latch head 134 located at the latch position, thereby preventing the latch member 122 from moving to the latch release position. When the movement preventing member 152 rotates from this state, the position restricting piece 152b is retracted from the position facing the rear end portion of the latch head 134, and the movement of the latch member 122 to the latch release position is allowed.
4 and 5 show a state in which the movement prevention member 152 prevents the movement of the latch member 122 to the latch release position, and FIGS. 6 to 10 show the movement prevention member 152 in the latch release position. The state where the movement of 122 is permitted is shown.

The connection piece 152 a of the movement preventing member 152 has a connection groove 154 formed on one end side, and another end side is connected to the torsion spring 140.
The connecting groove 154 is connected to a connecting pin 173 (see FIGS. 4, 6, and 8) described later, and is driven by the connecting pin 173 to rotate the movement preventing member 152.
The torsion spring 140 switches the direction in which the biasing force is applied according to the rotational position of the movement preventing member 152.
When the movement blocking member 152 is blocking the movement of the latch member 122 to the latch release position (see FIGS. 4 and 5), the torsion spring 140 is counterclockwise in FIGS. The movement preventing member 152 is urged to the position. At this time, a stopper pin 155 that prevents the movement preventing member 152 from rotating is provided on the bottom surface of the housing 123 so that the position restricting piece 152b does not rotate beyond the position facing the rear end portion of the latch head 134. Yes.
When the movement preventing member 152 is allowed to move the latch member 122 to the latch release position (see FIGS. 6 to 10), the torsion spring 140 is clockwise in FIGS. The movement preventing member 152 is biased. At this time, a stopper pin 156 that prevents the movement blocking member 152 from rotating is provided on the bottom surface of the housing 123 so that the connecting groove 154 of the connecting piece 152 a does not rotate beyond the movement locus of the connecting pin 173.

(C) Actuator As shown in FIGS. 4, 6, and 8, the actuator 201 is a motor (not shown) housed in a flat case 202, and a drive gear 203 is provided on one side of the case 202. Is exposed. The drive gear 203 is rotated by receiving power from a rotating shaft of a motor (not shown).
The actuator 201 is positioned above the latch mechanism 131 and the locking mechanism 151 and is built in the housing 123 with the rotation axis of the drive gear 203 directed in the horizontal direction.

(D) Power transmission mechanism The power transmission mechanism 171 is mainly configured by a hub 125 to which a key (not shown) is attached, and transmits the power of the actuator 201 to the latch mechanism 131 and the locking mechanism 151 via the hub 125. .
The hub 125 is a ring-shaped member that is attached to the housing 123 so as to be rotatable about a horizontal axis. The hub 125 includes a connecting hole 174 at the center and a driven gear 175 on the outer peripheral surface. The driven gear 175 is disposed at a position where the driven gear 175 meshes with the drive gear 203 of the actuator 201, and the hub 125 is driven to rotate as the drive gear 203 rotates.

A fan-shaped power transmission piece 176 is provided on the outer peripheral surface of the hub 125 so as to protrude in the radial direction. The power transmission piece 176 protrudes the pressing pin 172 and the connecting pin 173 described above in the horizontal direction.
Accordingly, the pressing pin 172 is displaced in an arc shape according to the rotation of the hub 125, and at this time, the pressed portion 139 of the latch bolt 133 is pressed to drive the latch member 122.
Further, the connecting pin 173 is also displaced in an arc shape according to the rotation of the hub 125, and at this time, the movement preventing member 152 is rotated.

The power transmission mechanism 171 changes the state of the door device 11 from the locked state to the unlocked / latched state and from the unlocked / latched state to the unlatched state by rotating the hub 125.
In the locked state shown in FIGS. 4 and 5, the pressing pin 172 is positioned at a position away from the pressed portion 139. The connecting pin 173 is connected to the connecting groove 154 of the movement preventing member 152.
In the unlocked / latched state shown in FIGS. 6 and 7, the pressing pin 172 advances to a position where it comes into contact with the pressed portion 139 as the hub 125 rotates. At this time, the connecting pin 173 connected to the connecting groove 154 rotates the movement preventing member 152 and falls off the connecting groove 154.
When the latch release state shown in FIGS. 8 to 10 is reached, as the hub 125 rotates, the pressing pin 172 presses the pressed portion 139 and moves the latch member 122 backward from the latch position to the latch release position.

The housing 123 has an exposure hole 126 that exposes the connection hole 174 of the hub 125 on each of one surface facing the indoor side of the door 31 and another surface facing the outdoor side.
A thumb turn is attached to the door 31 on the indoor side, and a key portion is attached to the outside of the door (both not shown). The thumb turn and the cylinder (not shown) of the key portion are connected to the connecting hole 174 of the hub 125 via the exposure hole 126. It is linked to.
The connecting hole 174 of the hub 125 protrudes from a pair of engaging pieces 177 that realize engagement with the thumb turn and the cylinder of the key portion. These engaging pieces 177 are arranged at intervals so as to allow, for example, 50 degrees of idle rotation when the thumb turn and the key cylinder are rotated. Hereinafter, this point will be described in detail.

When power is transmitted from the drive gear 203 to the driven gear 175 by the operation of the actuator 201, the hub 125 changes from the locked state to the unlocked / latch state and from the unlocked / latch state to the latched unlocked state. The rotation angles are each 20 degrees, for example. In other words, when the latch device main body 121 is in the locked state, the hub 125 rotates 20 degrees (the first rotation region of the hub 125) to shift to the unlocked / latched state, and the hub 125 further rotates 20 degrees (the hub Transition to an unlatched state. Therefore, when the hub 125 rotates 40 degrees, the door device 11 changes its state from the locked state to the unlatched state.
On the other hand, when locking / unlocking by operating the thumb turn or key, an operation of rotating the thumb turn or key 90 degrees is common. Therefore, the pair of engaging pieces 177 are engaged with the cylinders only after the thumb turn and the key part cylinder are idly rotated by 50 degrees, and thereafter the state is changed from the locked state to the unlatched state by the rotation of 40 degrees. It is arranged like this.

(E) Control Unit The housing 123 prepares a storage space S for storing the control unit 211 at a position adjacent to the actuator 201. In the storage space S, a circuit box (not shown) containing the control unit 211 and the wireless communication unit 212 is stored.
The control unit 211 includes a processor and a memory (both not shown), and the processor executes various arithmetic processes according to a program stored in the memory and centrally controls each unit such as the actuator 201.
The wireless communication unit 212 establishes wireless communication with the remote control key 301 possessed by the user.
The remote control key 301 has a built-in power supply (not shown), a control unit and a memory (not shown) that control each unit, a wireless communication unit (not shown) that performs wireless communication in an active manner, and an operation button 302. And an authentication code for unlocking is stored in the memory. When receiving the request for transmitting the authentication code, the control unit of the remote control key 301 wirelessly transmits the authentication code stored in the memory. When the operation button 302 is pressed, the control unit of the remote control key 301 wirelessly transmits a locking signal.
The control unit 211 operates using the battery EB incorporated in the indoor handle 32 in a replaceable manner as a power source, and receives signals from the electrostatic switches ES1 and ES2 incorporated in the indoor handle 32 and the outdoor handle 33, respectively.
The electrostatic switch ES1 built in the indoor handle 32 changes the mode of the output signal when the user touches the indoor handle 32. For this reason, the control part 211 can determine whether the user touched the indoor handle 32 by referring to the output signal of the electrostatic switch ES1.
The electrostatic switch ES2 built in the outdoor handle 33 changes the mode of the output signal when the user touches the outdoor handle 33. For this reason, the control part 211 can determine whether the user touched the outdoor handle 33 by referring to the output signal of the electrostatic switch ES2.

(F) Processing of control unit when opening door FIG. 12 is a flowchart showing a flow of processing of the control unit 211 when opening the door 31.
The control unit 211 determines whether the electrostatic switch ES1 is turned on, that is, whether the user touches the indoor handle 32 (step S101), and whether the electrostatic switch ES2 is turned on, that is, the outdoor handle 33 is touched by the user. It is waiting for the determination of whether or not (step S102).

When it is determined that the electrostatic switch ES1 is turned on (YES in Step S101), the control unit 211 drives the actuator 201 until the latch member 122 is located at the latch release position (Step S103).
That is, when the latch device main body 121 is locked (see FIGS. 4 and 5), the control unit 211 drives the actuator 201 until the hub 125 rotates 40 degrees counterclockwise in FIG. When the apparatus main body 121 is in the unlocked / latched state (see FIGS. 6 and 7), the actuator 201 is driven until the hub 125 rotates 20 degrees counterclockwise in FIG.
As a result, the latch member 122 is positioned at the latch release position (see FIGS. 8 and 9), and the door 31 can be opened as it is (see FIG. 10).

When it determines with electrostatic switch ES2 having been turned on (YES of step S102), the control part 211 confirms whether the present state is a locked state (step S105). Whether or not it is in the locked state can be easily determined by checking whether or not the locking process (shown in the flowchart of FIG. 13 described later) is performed in accordance with the locking signal received from the remote control key 301.
When it is determined that the control unit 211 is not in the locked state (NO in step S105), the process of step S103 for driving the actuator 201 is executed until the latch member 122 is positioned at the latch release position. As a result, the door 31 can be opened (see FIGS. 4 to 10).
On the other hand, when it determines with it being in a locked state (YES of step S105), the control part 211 drive-controls the radio | wireless communication part 212, and transmits the transmission request | requirement of an authentication code by radio | wireless (step S106).
At this time, if the user has the remote control key 301, the remote control key 301 receives the request for transmitting the authentication code and wirelessly transmits the authentication code stored in the memory.
Therefore, the control unit 211 waits for the reception of the authentication code (step S107). If the authentication code is received (YES in step S107), the control unit 211 executes a process for determining whether or not the authentication has been properly performed (step S108).
When the authentication code is authenticated (YES in step S108), the control unit 211 executes the process of step S103 for driving the actuator 201 until the latch member 122 is positioned at the latch release position. As a result, the door 31 can be opened (see FIGS. 4 to 10).
If the authentication code has not been received (NO in step S107), or if the authentication code has not been authenticated (NO in step S108), the control unit 211 does not execute the unlocking process, and the door 31 cannot be opened.

The control unit 211 executes the process of driving the actuator 201 so as to return the latch member 122 to the latch position immediately after performing the process of step S103 that drives the actuator 201 until the latch member 122 is located at the latch release position. (Step S104). That is, in FIG. 8, the actuator 201 is driven so as to rotate the hub 125 by 20 degrees counterclockwise, and the state shown in FIG. 6 is obtained.
As a result, the latch device main body 121 maintains the unlocked and latched state (see FIGS. 6 and 7).

  After executing the process of step S104 for driving the actuator 201 to return the latch member 122 to the latch position, the control unit 211 ends the series of processes, and determines whether the electrostatic switch ES1 is turned on again (step S104). S101) Waits for the determination of whether the electrostatic switch ES2 is turned on (step S102).

(G) Processing of Control Unit when Locking FIG. 13 is a flowchart showing the flow of processing when a locking signal is received.
When the current state is not the locked state, the control unit 211 waits for a lock signal reception determination (step S201).
If it is determined that the locking signal is received (YES in step S201), the control unit 211 drives the actuator 201 to the locking position (step S202).
That is, when the latch device main body 121 is not in the locked state, the movement preventing member 152 is flipped up while the latch member 122 is positioned at the latch position, and the leading end portion of the position restricting piece 152b is disengaged from the rear end portion of the latch head 134. (See FIGS. 6 and 7). Therefore, the control unit 211 drives the actuator 201 so that the hub 125 rotates by 20 degrees counterclockwise in FIG. As a result, the movement preventing member 152 positions the front end portion of the position restricting piece 152b at a position facing the rear end portion of the latch head 134, thereby realizing a locked state.

3. Effect (1) Locking When the door 31 is closed, the striker 111 attached to the door frame 21 is inserted into the insertion hole 102 (outer hole 102a, inner hole 102b) of the door 31 and the latch device main body 121. Yes.
As shown in FIGS. 4 and 5, in the locked state, the pressing pin 172 provided on the hub 125 is positioned at a position away from the pressed portion 139 of the latch member 122. Therefore, the latch member 122 is urged by the torsion spring 140 to be positioned at the latch position, and the latch head 134 is fitted into the latch hole 112 of the striker 111. At this time, since the latch head 134 is prevented from rotating by the rotation preventing member 138, the latch head 134 does not rotate even if the door 31 is pushed in the opening direction, and the door 31 is latched.
Further, as shown in FIG. 4, the position restricting piece 152b of the movement preventing member 152 has its front end facing the rear end portion of the latch head 134 located at the latch position, thereby preventing the latch member 122 from moving to the latch release position. doing. For this reason, even if the door 31 is destroyed and the latch member 122 is exposed to the outside, it is impossible to apply an external force to move the latch member 122 to the latch release position. Sex is obtained.

(2) Unlocking When the door device 11 is in the locked state, the user touches the indoor handle 32 or holds the remote control key 301 and touches the outdoor handle 33 so that the door device 11 is unlocked and latched. (See FIGS. 6 and 7), the latch is released (see FIGS. 8 and 9).
When the door device 11 is in the unlocked / latch state, the user touches the indoor handle 32 or the outdoor handle 33 so that the door device 11 jumps over the unlocked / latch state (see FIGS. 6 and 7) and latches. The release state is established (see FIGS. 8 and 9).
At this time, since the user is pushing the indoor handle 32 or pulling the outdoor handle 33, the latch head 134 pushed to the edge of the latch hole 112 of the striker 111 rotates (see FIG. 10), and the latch head 134 The latch member 122 slides and retreats due to the force when the striker 111 comes out from. As a result, the door 31 can be opened.

Since a series of operations for opening the door 31 should be completed in a short time, as described above, the control unit 211 performs a process of driving the actuator 201 to return the latch member 122 from the latch release position to the latch position. Execute (see step S104 in the flowchart of FIG. 12). As a result, the hub 125 shown in FIG. 8 rotates 20 degrees counterclockwise, resulting in the state shown in FIG.
However, in the state where the door 31 is opened, the latch head 134 remains pushed and rotated by the edge of the latch hole 112 of the striker 111 (see FIG. 10), so the latch member 122 is biased by the torsion spring 140. Thus, it does not hit the side wall of the housing 123 and return to the latch position shown in FIGS. When the door 31 is closed in such a state, the tip of the striker 111 hits the entry surface 136 of the latch head 134, and the latch head 134 is rotated to the original position again. In this process, the latch member 122 is pushed back by the striker 111, the striker 111 gets over the latch head 134, and the latch head 134 is engaged with the latch hole 112. At this time, the latch member 122 is positioned at the latch position for the first time (see FIGS. 6 and 7), and the latch device main body 121 is unlocked and latched.

(3) Improvement of crime prevention strength In the present embodiment, the striker 111 is attached to the door frame 21 so as not to be exposed from a gap formed between the door frame 21 and the door 31, and is opened on the indoor side surface of the door 31. The latch member 122 is detachably engaged with the striker 111 inserted through the insertion hole 102 to latch the door 31.
For this reason, since the door 31 is latched with respect to the door frame 21 on the indoor side, even if the door frame 21 is broken, the latch structure portion cannot be reached from the outside. Further, the striker 111 and the latch member 122 can easily form a locking structure.
Therefore, a criminal act of breaking the door frame 21 and breaking the lock of the door 31 can be reliably prevented.

In the present embodiment, the latch member 122 moves in the horizontal direction to engage the striker 111 to latch the door 31 and to release the engagement of the striker 111 and release the latch of the door 31. Displace between the latch release position
Therefore, the latch mechanism 131 can be realized with a simple structure in which the latch member 122 is simply moved linearly.

In the present embodiment, the latch member 122 is engaged with and disengaged from a latch hole 112 provided in the striker 111 at the front end of a latch bolt 133 that is mounted so as to be movable in the horizontal direction. The latch head 134 includes a latch head 134. The latch head 134 is prevented from rotating by the rotation preventing member when the latch member 122 is in the latch position, and is pressed against the striker 111 to be engaged and disengaged when the latch member 122 is located in the latch release position. Then, the angle of contact with the striker 111 is made smaller than 90 degrees.
Therefore, when the door 31 is opened and closed, the latch head 134 pushed by the striker 111 operates so as to retreat the latch member 122 while rotating, thereby providing a moderation to the door 31 opening and closing operation.

In the present embodiment, a movement blocking member 152 that selectively blocks the horizontal movement of the latch member 122 when the latch member 122 is located at the latch position is provided.
Therefore, the locking mechanism 151 can be easily added to the latch mechanism 131 without complicating the structure.

(4) Simplification of the structure having both the latch mechanism and the locking mechanism In this embodiment, the actuator 201 that drives the latch member 122 is operated in a direction to release the engagement with the striker 111 provided on the door frame 21. Since the latch member 122 is driven in the direction to release the engagement with the striker 111, the striker 111 and the latch member 122 can easily form a locking structure, and thus a structure that can have a locking function. The latch device 101 can be realized with a simple structure.

In the present embodiment, the latch member 122 is biased in a direction to engage with the striker 111 by the biasing force of the torsion spring 140.
Therefore, the latch state can be made more reliable with a simple structure.

In the present embodiment, the latch member 122 moves in the horizontal direction to engage the striker 111 to latch the door 31 and to release the engagement of the striker 111 and release the latch of the door 31. And a rotatable hub 125 that is displaced between the latch release position and converts the rotational motion of the actuator 201 into the linear motion of the latch member 122.
Therefore, the latch mechanism 131 can be realized with a simple structure in which the rotational motion of the actuator 201 is simply converted into the linear motion of the latch member 122 by the hub 125.

In the present embodiment, when the latch member 122 is positioned at the latch position, a movement blocking member 152 that selectively blocks the horizontal movement of the latch member 122 is provided, and the hub 125 is a position that prevents the horizontal movement of the latch member 122. And a second rotation region for displacing the latch member 122 to a position for releasing the engagement with the striker 111.
Therefore, the locking mechanism 151 can be easily added to the latch mechanism 131 without complicating the structure. In addition, since the locking mechanism 151 can be operated by the first rotation region of the hub 125 and the latch mechanism 131 can be operated by the second rotation region of the hub 125, there is no problem between the latch mechanism 131 and the locking mechanism 151. In addition, the structure can be shared, and the structure can be simplified and the parts cost can be reduced.

(5) Simplification of door device As described above, the latch device 101 of the present embodiment has the latch mechanism 131 and the locking mechanism 151 by the striker 111 and the latch member 122, and the indoor handle 32 and the outdoor handle 33. Since the control unit 211 that has received signals from the electrostatic switches ES1 and ES2 incorporated therein is configured to perform locking and unlocking by driving the actuator 201 and rotating the hub 125, it is necessary for the conventional door device. A movable handle member becomes unnecessary.
In the present embodiment, electrostatic switches ES1 and ES2 are used as means for detecting the user's intention to lock / unlock, but a mechanical switch that operates by pressing a button (not shown) or the like may be used. No problem.
Further, in the present embodiment, the indoor side handle 32 and the outdoor side handle 33 that are fixed handles are used as a gripping part for the user to open and close the door 31, but the part that the user can put on is the door. It is also possible to adopt a configuration in which a means for detecting the user's intention of locking / unlocking is arranged in the vicinity thereof.
In the case where a failure has occurred such that the latch device 101 is not electrically driven, a key held by a user is inserted into a key cylinder (not shown) connected to the hub 125 to perform a turning operation. The latch mechanism 131 and the locking mechanism 151 can be locked and unlocked by rotating 125.

4). Various modifications and changes can be made in implementation.
For example, the engagement of the latch member 122 with the latch hole 112 of the striker 111 may be performed by rotating a hook-shaped latch member, as described in Patent Document 1, for example.
The striker 111 is not limited to a hole shape like the latch hole 112, and may be a structure in which a latch member formed in a fork shape is engaged with a pin-shaped member, for example.
Further, in this embodiment, the parts are shared between the latch mechanism 131 and the locking mechanism 151, or the common power transmission mechanism 171 mainly composed of the hub 125 is operated. The locking mechanism 151 may be realized as a completely independent structure.
Other variations and modifications are possible.

21 ... Door frame 31 ... Door 101 ... Latch device 102 ... Insertion hole 111 ... Strike 112 ... Latch hole 122 ... Latch member 125 ... Hub 133 ... Latch Bolt 134 ... Latch head 138 ... Rotation prevention member 140 ... Torsion spring (spring)
152 ... Movement prevention member 201 ... Actuator 211 ... Control part

Claims (10)

A door latch device that can be freely opened and closed on a door frame of a building,
A striker provided on the door frame;
A latch member that removably engages the striker to prevent the door from being opened in a state where the door is closed;
An actuator for driving the latch member in a direction to release the engagement with the striker;
A controller that operates the actuator in response to an instruction to release the latch and drives the latch member in a direction to release the engagement with the striker;
A latch device comprising: The latch member is biased in a direction to engage with the striker by the force of a spring.
The latch device according to claim 1. The striker is attached to the door frame so as not to be exposed from a gap formed between the door frame and the door, and is provided to project in the opening / closing direction of the door at a position interfering with the opening / closing locus of the door,
The latch member is detachably engaged with the striker inserted through an insertion hole that opens on the indoor side surface of the door in a state where the door is closed, and prevents the door from being opened.
The latch device according to claim 1 or 2, characterized by the above-mentioned. The latch member moves in a horizontal direction to engage a latch position for latching the door by engaging the striker, and a latch release position for releasing the latch of the door by releasing the engagement with the striker. Displaced between
A rotatable hub that converts rotational movement of the actuator into linear movement of the latch member;
The latch device according to claim 3. The latch member includes a latch head that is rotatable about a vertical axis and is engaged with and disengaged from a latch hole provided in the striker at a distal end portion of a latch bolt that is attached to be movable in a horizontal direction.
The latch head is
When the latch member is located at the latch position, the rotation prevention member is prevented from rotating,
When the latch member is located at the latch release position, the striker to be engaged / disengaged is rotated by being rotated, and a contact angle with the striker is set to an angle smaller than 90 degrees,
The latch device according to claim 4. A movement preventing member for selectively preventing horizontal movement of the latch member when the latch member is located at the latch position;
The latch device according to claim 5. The hub is
A first rotation region for displacing the movement blocking member between a position where the horizontal movement of the latch member is blocked and a position where the latch member is not blocked;
A second rotation region for displacing the latch member to a position for releasing the engagement with the striker;
Comprising
The latch device according to any one of claims 4 to 6, characterized in that: A door that can be freely opened and closed to the door frame of the building;
A striker provided on the door frame;
A latch member that removably engages the striker to prevent the door from being opened in a state where the door is closed;
An actuator for driving the latch member in a direction to release the engagement with the striker;
A controller that operates the actuator in response to an instruction to release the latch and drives the latch member in a direction to release the engagement with the striker;
A door device comprising: The latch member is biased in a direction to engage with the striker by the force of a spring.
The door device according to claim 8. The control unit operates the actuator in accordance with an electrical signal output from a switch unit built in the door or a grip unit formed integrally with the door.
The door device according to claim 8 or 9, characterized in that.

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