JP4877037B2 - Locking device - Google Patents

Description

  The present invention relates to a lock device that electrically and mechanically locks and unlocks a door.

Conventionally, as a locking device that electrically locks / unlocks a door, the door can be forcibly unlocked by applying a predetermined load or more in an emergency even when the door is locked. Some are known, for example, as disclosed in Japanese Patent Application Laid-Open No. 2005-320824 (Patent Document 1). This conventional example is an automatic closing device for a fire door in which a main body housing is mounted and fixed at an appropriate position of a recess formed on a wall surface to store the fire door, and is normally exposed from a notch opening of the main body housing. Pushing the engagement fitting provided on the fire door side into the hook plate that was made to actuate the latch mechanism built in the main body housing, and the hook plate restrains the engagement fitting and holds the fire door in the recess. In the event of an emergency such as when a fire breaks out, the solenoid built in the main housing is driven to release the latch mechanism and the hook plate releases the engagement fittings, so that the fire door is opened by the door closer etc. Close. Further, when the solenoid is not driven for some reason, the passage can be forcibly closed by pulling the engagement fitting from the hook plate by pulling the engagement fitting with a predetermined force or more.
JP 2005-320824 A

  The lock device shown in the above conventional example has a structure in which a latch mechanism is operated by interlocking a plurality of parts sequentially by driving a solenoid, and the hook plate and the engagement fitting are unlocked and unlocked. Therefore, there has been a problem that the structure of the apparatus becomes complicated.

  Therefore, in order to solve the above problem, as a locking device that can be forcibly unlocked with a simple structure, a latch portion disposed on either the door or the door frame, and a door or door frame A locking device including a catch portion disposed on either one of the other devices is conceivable.

  As shown in FIG. 13, the locking device includes a latch bolt 1 that is movable in a direction perpendicular to the opening / closing direction of the door A and biased in a direction toward the catch portion 2, And control means 11 for controlling the movement of the latch bolt 10 by energization. The catch portion 2 includes a catch 20 that engages with the latch bolt 10 and displacement members 21 and 22 that urge the catch 20 in a direction toward the latch bolt 10. When the latch bolt 10 is engaged with the catch 20, the control means 11 is energized to prevent the latch bolt 10 from moving, and the door A is locked. Moreover, the movement prevention of the latch bolt 10 can be cancelled | released by stopping the electricity supply to the control means 11, and the door A is unlocked.

  Further, when the locking of the latch bolt 10 cannot be released due to some factor during locking, the catch 20 is displaced and latched by applying a load greater than the urging force of the displacement members 21 and 22 to the door A. The door A can be unlocked by disengaging the bolt 10 and the catch 20.

  However, in this locking device, the door 11 is locked by the control means 11 preventing the movement of the latch bolt 10, but when the distance between the door A and the door frame B varies due to the aging of the building, There is a problem that the position of the catch 20 is changed and the fitting state of the latch bolt 10 is changed, and a predetermined locking force cannot be obtained.

  The present invention has been invented in view of the background art described above, and its purpose is a lock that can have a predetermined locking force even when the distance between the door and the door frame varies due to aging. It is an object to provide an apparatus.

  In order to solve the above-mentioned problem, in the invention according to claim 1 of the present application, in the locking device that locks and unlocks the door, a latch portion disposed on either the door or the door frame, and the door or door frame A latch part that is movable in a direction perpendicular to the door opening and closing direction, and a control means for controlling the movement of the latch bolt. The catch portion includes a catch that engages with the latch bolt, and a displacement member that biases the catch in a direction toward the latch bolt, and the latch bolt engages the catch with an inclined surface that is inclined with respect to the moving direction. The control means can move the latch bolt in a direction perpendicular to the door opening and closing direction by moving in contact with the inclined surface of the latch bolt. Latchbo in It is characterized by having one or more wedge can change the position of the bets.

  In the invention according to claim 2 of the present application, in the locking device according to claim 1, the control means includes an electric motor that generates rotational power, and a screw portion that is connected to the electric motor and rotates by the rotational power of the electric motor. The wedge is characterized in that it is screwed with the screw part so as to move by rotation of the screw part.

  According to a third aspect of the present invention, in the locking device according to the second aspect, the latch bolt has at least two inclined surfaces having an angle, and the screw portion is separated from the right screw and the left at the vicinity of the center. One wedge is in contact with one inclined surface and screwed with the right screw of the screw portion, and the other wedge is in contact with another inclined surface and left screw of the screw portion. It is characterized by screwing.

  The invention according to claim 4 of the present application is characterized in that, in the locking device according to claim 2 or 3, the thread of the screw portion is rectangular.

  The invention according to claim 5 of the present application is characterized in that in the locking device according to any one of claims 1 to 4, the latch bolt and at least one wedge are fitted.

  The invention according to claim 6 of the present application is characterized in that the locking device according to any one of claims 1 to 5 is provided with a wedge buffer portion that alleviates the impact on the wedge during the unlocking operation. .

  The invention according to claim 7 of the present application is characterized in that the locking device according to any one of claims 1 to 6 is provided with a latch bolt buffer portion that reduces an impact on the latch bolt during movement. .

  In the invention according to claim 8 of the present application, in the locking device according to any one of claims 1 to 7, the control means has a predetermined impact force to start the movement of the wedge. It is a feature.

  In the invention according to claim 9 of the present application, in the locking device according to any one of claims 2 to 8, the electric motor includes a drive gear that covers the periphery of the screw portion and transmits the rotational power to the screw portion. The screw portion has a taper at a part of a connection portion with the drive gear, and the drive gear includes a protrusion so as to have a predetermined distance from the taper.

  In the invention according to claim 10 of the present application, in the locking device according to any one of claims 2 to 9, the wedge includes a through hole and a nut flange disposed in the through hole, and a nut. The flange includes a nut portion that fits into the screw portion, and flanges that are disposed at both ends of the nut portion and outside the through hole.

  The invention according to claim 11 of the present application is characterized in that, in the locking device according to claim 10, the distance between both flanges of the nut flange is larger than the length of the through hole.

  The invention according to claim 12 of the present application is characterized in that in the locking device according to any one of claims 10 and 11, a nut flange is provided between the wedge and at least one of the flanges.

  In the locking device according to the first aspect of the present invention, the latch bolt is provided with an inclined surface inclined with respect to the moving direction, and the control means is brought into contact with the inclined surface of the latch bolt to move, thereby Since it has one or more wedges that move the bolt in the direction perpendicular to the door opening and closing direction, the wedge is moved in the direction perpendicular to the latch bolt movement direction and the wedge is pushed by the wedge to release the latch bolt. It can be moved from the locked state to the locked state. As a result, the control means can be configured to move in a direction perpendicular to the moving direction of the latch bolt, so that the latch portion can be made thinner and attached to a door frame or the like having a narrow construction space. Become. In addition, since the wedge can change the position of the latch bolt at the time of locking or unlocking, even if the distance between the door and the door frame fluctuates due to aging of the door, the position of the wedge is changed. Since the amount of protrusion of the latch bolt can be arbitrarily changed by changing, a predetermined locking force can be maintained.

  In the locking device according to the second aspect of the present invention, in particular, the control means includes an electric motor that generates rotational power and a screw portion that is connected to the electric motor and rotates by the rotational power of the electric motor. Since the screw part is screwed so as to move by the rotation of the part, the movement direction of the wedge can be changed by controlling the rotation direction of the electric motor. Thus, by controlling the rotation of the electric motor, it is possible to lock and unlock the door by controlling the movement of the latch bolt caused by the movement of the wedge. In addition, even when the movement distance of the latch bolt is long and the movement distance of the wedge is necessary, the movement distance of the wedge can be increased by increasing the rotation angle of the screw portion, so the control means can be reduced in size. can do.

  In the locking device according to the third aspect of the present invention, in particular, the latch bolt has at least two inclined surfaces having an angle, and the screw portion is composed of a right screw and a left screw with a central vicinity as a boundary. One wedge comes into contact with one inclined surface and is screwed with the right screw of the screw portion, and another wedge comes into contact with the other inclined surface and screwed with the left screw of the screw portion. Therefore, the latch bolt can be supported by a plurality of wedges. As a result, the movement of the latch bolt can be made more stable. Further, the wedges can move in opposite directions by the rotation of the screw portion. When the wedge moves away, the latch bolt moves in the unlocking direction. When the wedge moves in the approaching direction, the latch bolt can move in the locking direction. This makes it possible to control the movement of the latch bolt due to the movement of the plurality of wedges without adding a new electric motor and screw portion, and thus the number of parts can be reduced.

  In the locking device according to the fourth aspect of the present invention, in particular, since the thread of the screw portion is rectangular, the fastening force of the screw portion can be reduced, and the operation by the latch bolt engaging with the screw portion. The occurrence of defects can be reduced.

  In the lock device of the invention according to claim 5 of the present application, in particular, when the latch bolt is moved in order to change from the locked state to the unlocked state, the latch bolt and at least one wedge are fitted, The movement of the latch bolt can be guided by the movement of the wedge. Accordingly, it is not necessary to provide a biasing means for moving the latch bolt from the locked state to the unlocked state separately, and parts can be reduced. Further, since the urging means is not provided on the latch bolt, when the latch bolt is moved from the unlocked state to the locked state, it is not necessary to move the wedges against the urging force, and the torque of the screw portion is reduced. It is possible to reduce the power consumption.

  In the locking device according to the sixth aspect of the present invention, in particular, since a wedge buffer portion is provided to alleviate the impact on the wedge during the unlocking operation, the wedge is caught in the screw portion by the impact during the unlocking operation. Therefore, it is possible to reduce failures that become inoperable, and to further facilitate the start-up at the time of unlocking and reversing the locking, thereby improving the reliability.

  In the locking device according to the seventh aspect of the present invention, in particular, since the latch bolt buffer portion is provided for reducing the impact on the latch bolt during movement, the impact on the latch bolt during locking and unlocking is mitigated. can do. As a result, the impact on the wedges can be mitigated, so it is possible to reduce malfunctions that cause the wedges to become inoperable due to biting into the threaded parts, and to facilitate startup when unlocking and reversing the lock. It is possible to improve reliability more than what can be done.

  In the lock device according to the eighth aspect of the present invention, in particular, since the control means has a predetermined impact force and starts the movement of the wedge, it becomes inoperable when the wedge bites into the screw portion. Even in such a case, the biting can be released. As a result, it is possible to reduce failures that become inoperable due to the wedges biting into the threaded portions, so that reliability can be improved.

  In the locking device according to the ninth aspect of the present invention, in particular, the electric motor includes a drive gear that covers the periphery of the screw portion and transmits the rotational power to the screw portion, and the screw portion is a part of a connection portion with the drive gear. Since the drive gear is provided with a protrusion so as to have a predetermined distance from the taper, the protrusion of the drive gear contacts the taper of the screw portion after a predetermined time after starting the motor. By contacting, the rotational drive of the screw portion can be started. Thus, the drive gear can have a running section, and when the protrusion comes into contact with the taper, the screw portion can be started to rotate with a predetermined impact force. As a result, even when the wedges are biting into the screw part, the biting can be released by starting the rotational driving of the screw part with an impact force.

  In the locking device according to the tenth aspect of the present invention, in particular, the wedge includes a through hole and a nut flange provided in the through hole, and the nut flange includes a nut portion that fits into the screw portion, and a nut. Since the nut flange is moved by rotation of the screw portion and the flange pushes the side surface of the wedge, the wedge can be moved. . As a result, the nut flange can be interposed in the rotation of the screw part and the movement of the wedge, and it is possible to reduce the application of a radial load to the screw part, thereby reducing the torque and improving the operation reliability. Can be realized.

  In the lock device according to the eleventh aspect of the present invention, in particular, since the distance between the two flanges of the nut flange is larger than the length of the through hole, a gap can be provided between the flange and the wedge. By changing the distance between both flanges, the distance between the flange and the wedge can be changed, and the impact force to the wedge by the nut flange at the time of inversion can be arbitrarily set. Occurrence of malfunction due to biting of the wedge thread portion can be reduced.

  In the locking device according to the twelfth aspect of the present invention, in particular, since the nut flange cushioning portion is provided between the wedge and at least one of the flanges, the impact of the nut flange on the wedge during locking or unlocking Can be mitigated, and the occurrence of malfunction due to the biting of the wedge into the threaded portion can be reduced.

  1 to 4 show a locking device according to a first embodiment of the present invention. In the locking device that locks and unlocks the door A, the latch portion 1 disposed on either the door A or the door frame B and the catch portion disposed on either the door A or the door frame B 2, the latch unit 1 includes a latch bolt 10 that is movable in a direction perpendicular to the opening and closing direction of the door A, and a control unit 11 that controls the movement of the latch bolt 10. The latch 20 includes a catch 20 that engages with the latch bolt 10, and a first displacement member 21 and a second displacement member 22 that are displacement members that urge the catch 20 in a direction toward the latch bolt 10. The control unit 11 has an inclined surface 10a inclined with respect to the moving direction on the side opposite to the side engaged with the catch 20, and the control means 11 moves in contact with the inclined surface 10a of the latch bolt 10 so that Open door A It can be moved in the direction perpendicular to the direction, and a position one or more of the wedge 14 can be changed in the latch bolt 10 in the locking up or during unlocking. In addition, the latch bolt 10 and the wedge 14 are fitted, and the wedge bolt 18 is formed of a cushioning material or an elastic material that alleviates the impact on the wedge 14 during the unlocking operation. A latch bolt cushioning part 19 is provided to reduce the impact on the latch bolt 10.

  Hereinafter, the locking device of this embodiment will be described in more detail. The top, bottom, left, and right in FIG. As shown in FIG. 1A, the present embodiment includes a latch portion 1 disposed on the door frame B and a catch portion 2 disposed on the door A so as to face the latch portion 1.

  As shown in FIG. 2, the latch part 1 and the catch part 2 apply the mounting plates 3 and 4 to the door frame B and the door A, respectively, so that the longitudinal direction thereof coincides with the vertical direction. The mounting screws 5 are screwed through the mounting holes 3a and 4a respectively penetrating the upper and lower ends, so that they are mounted to the door frame B and the door A, respectively. Further, protective covers 30 and 40 for protecting the components constituting each part are attached so as to cover the mounting plates 3 and 4 with the latch bolt 10 and the catch 20 exposed, and these protective covers 30 and 40 and A housing is constituted by the mounting plates 3 and 4. The latch unit 1 is connected to a controller (not shown) that transmits a locking / unlocking drive signal by a signal line 100.

  As shown in FIG. 1A, the latch unit 1 includes a latch bolt 10 that is movable in a direction (left-right direction) perpendicular to the opening / closing direction of the door A (direction perpendicular to the paper surface in FIG. 1), and a vertical direction. It has the wedge 14 which moves the latch bolt 10 by moving, the electric motor 12 and the screw part 13 which move the wedge 14 to an up-down direction. The electric motor 12, the screw portion 13 and the wedge 14 constitute the control means 11.

  The electric motor 12 is connected to the screw portion 13 and can move the screw portion 13 in the vertical direction. Further, the wedge 14 has a through hole 14c and is screwed with the screw portion 13, and the wedge 14 can be moved in the vertical direction by moving the screw portion 13 of the electric motor 12 in the vertical direction. Furthermore, since the wedge 14 is screwed with the screw portion 13, the wedge 14 can be freely moved in the longitudinal direction of the screw portion 13 by rotating the wedge 14. Thereby, the vertical position of the wedge 14 at the time of unlocking or locking can be adjusted.

  The latch bolt 10 has an inclined surface 10a at the left end that is inclined to the right as it goes downward. A frame 17 having an opening penetrating in the left-right direction is fixedly attached to the right end edge of the mounting plate 3. The opening of the frame 17 is formed to have a size that allows the latch bolt 10 to pass through. The movement of the latch bolt 10 in a direction other than the left-right direction is restricted by inserting the latch bolt 10 through the opening.

  The wedge 14 has an inclined surface 14a inclined to the right as it goes downward so as to contact the inclined surface 10a of the latch bolt 10, and the wedge 14 moves upward so that the latch 14 The bolt 10 can be pushed and moved to the right. In addition, since the wedge 14 moves while contacting the left end surface with the mounting plate 15, the movement in the left-right direction is prevented. Further, since the wedge 14 is screwed with the screw portion 13, the wedge 14 can be moved in the longitudinal direction of the screw portion 13, and the left and right positions of the latch bolt 10 at the time of unlocking or locking can be adjusted. .

  As shown in FIG. 3, the latch bolt 10 has a convex portion 10b along the inclined surface 10a, and the wedge 14 has a concave portion 14b corresponding to the convex portion 10b along the inclined surface 14a. Since the convex mechanism 10b and the concave portion 14b can be engaged to form a guide mechanism, the wedge 14 can move the latch bolt 10 in the left-right direction when it moves up and down. That is, when the wedge 14 moves upward, the inclined surface 14a of the wedge 14 pushes the inclined surface 10a of the latch bolt 10 so that the latch bolt 10 moves to the left and the wedge 14 moves downward. In this case, the latch bolt 10 can be moved leftward by the guide mechanism constituted by the convex portion 10b and the concave portion 14b.

  In this embodiment, the latch bolt 10 is provided with the convex portion 10b, and the wedge 14 is provided with the concave portion 14b. However, the latch bolt 10 is provided with the concave portion, and the wedge 14 is provided with the convex portion, and the guide mechanism. May be configured.

  Thus, the latch bolt 10 can be moved in the left-right direction by the movement of the wedge 14 in the up-down direction.

  Further, a stopper 16 for preventing the wedge 14 from dropping is provided below the wedge 14. Between the stopper 16 and the wedge 14, there is provided a wedge buffer portion 18 made of a cushioning material or an elastic material for buffering an impact on the wedge 14 when the wedge 14 moves downward. Yes.

  Further, a latch bolt cushioning portion 19 made of a cushioning material or an elastic material is interposed between the left end of the latch bolt 10 and the wedge 14, and one end of the latch bolt cushioning portion 19 is connected to the wedge 14. The other end is attached to the left end of the latch bolt 10.

  As shown in FIG. 1A, the catch portion 2 includes a catch 20 that engages with the latch bolt 10, a first displacement member 21 that biases the catch 20 in a direction toward the latch bolt 10, and a second displacement. Member 22. The catch 20 is supported by a frame 28 that is fixedly mounted at substantially the center of the left end edge of the mounting plate 4 formed in a substantially flat plate shape. The frame 28 has an opening (not shown) that is formed in a size that allows the catch 20 to pass therethrough in the left-right direction, and allows the catch 20 to be inserted through the opening so that the catch 20 has a direction other than the left-right direction. The movement to is regulated. Further, a protrusion 20 a protruding in a mountain shape is provided at the right end of the catch 20.

  As shown in FIG. 1B, the latch bolt 10 and the catch 20 include a mountain-shaped right end portion of the latch bolt 10 and a valley-shaped left end portion corresponding to the shape of the right end portion of the latch bolt 10 of the catch 20 Are to be engaged.

  Further, each of the first displacement member 21 and the second displacement member 22 is formed by overlapping a plurality of elastic plate-like members, and is erected from the right edge of the mounting plate 4 toward the front side of the drawing. Are held by a pair of holding portions 26 provided on the mounting piece 29.

  Next, the operation of the locking device of this embodiment will be described. First, when unlocking, the electric motor 12 is not energized, and the screw portion 13 is urged downward by a spring (not shown) provided in the electric motor 12. As a result, the wedge 14 is biased downward and moved downward, and the latch bolt 10 is moved leftward by the guide mechanism constituted by the convex portion 10b and the concave portion 14b. In addition, the latch bolt 10 and the catch 20 are disengaged, and the door A can be freely opened and closed.

  At the time of locking, when the electric motor 12 is energized, the screw portion 13 moves upward. As a result, the wedge 14 connected to the screw portion 13 moves upward, presses the inclined surface 10 a of the latch bolt 10, moves the latch bolt 10 to the right, and engages with the catch 20. Therefore, when the door A is opened, the slope of the valley-shaped portion of the catch 20 pushes the slope of the mountain-shaped portion of the latch bolt 10 to move the latch bolt 10 to the left, but the left end portion of the latch bolt 10 Abuts against the wedge 14 to prevent movement. At this time, the catch 20 also receives a load from the latch bolt 10 and moves rightward so that the protrusion 20 a contacts the first displacement member 21, and the second displacement member 22 depends on the position of the connecting member 24. Since it is strongly urged to the left, movement to the right is prevented. In this way, the door A cannot be opened because the latch bolt 10 and the catch 20 cannot be disconnected.

  Here, in the locked state, the catch 20 is brought into contact with the latch bolt 10 by pushing or pulling the door A, and further loaded, the first displacement member 21 and the second displacement member 22 of the catch portion 2 are moved. A bending force acts, a predetermined amount of deflection is generated by the spring constants of the displacement members 21 and 22, the latch bolt 10 and the catch 20 are disengaged, and the door A can be forcibly opened (opened). Incidentally, the adjustment of the locking force is realized by changing the connection position of the first displacement member 21 and the second displacement member 22 by the connection member 24.

  The latch bolt 10 has an inclined surface 10a inclined to the left as it goes down at the left end, and the wedge 14 has an inclined surface 10a at the right end that is inclined left as it goes down. It is good. In this case, when the wedge 14 is moved upward, the latch bolt 10 is moved leftward and the door A is unlocked. When the wedge 14 is moved downward, the latch bolt 10 is moved rightward. Thus, the door A is locked.

  Moreover, the guide mechanism comprised by the convex part 10b and the recessed part 14b may be abbreviate | omitted, and the elastic material which urges | biases the latch bolt 10 to the left direction may be provided.

  Further, when the electric motor 12 is energized, the screw portion 13 can be moved upward, and when the electric motor 12 is not energized, only the upward urging of the screw portion 13 may be released. . In this case, since the electric motor 12 cannot move the screw portion 13 downward, it is necessary to provide the latch bolt 10 with an elastic material that urges it to the left. When the latch bolt 10 is moved leftward by urging in the leftward direction, the wedge 14 can be pressed to move the wedge 14 downward, and the screw portion 13 can be moved downward. In this case, the electric motor 12 may be energized only when the door is locked, and power saving can be realized.

  Therefore, the latch bolt 10 is provided with an inclined surface 10a inclined with respect to the moving direction, and the control means 11 moves in contact with the inclined surface 10a of the latch bolt 10 to move the latch bolt 10 of the door A. Since there is one or a plurality of wedges 14 that move in a direction perpendicular to the opening and closing direction, the wedges 14 are moved in a direction perpendicular to the moving direction of the latch bolts 10, and the inclined surfaces 10 a are pushed by the wedges 14. Can be moved from the unlocked state to the locked state. As a result, the control means 11 can be configured to move in a direction perpendicular to the moving direction of the latch bolt 10, so that the latch portion 1 can be made thin and attached to the door frame B or the like having a narrow construction space. It becomes possible. Further, even if the distance between the door A and the door frame B varies due to the aging of the door A or the like, the protruding amount of the latch bolt 10 can be arbitrarily changed by changing the position of the wedge 14. Therefore, a predetermined locking force can be maintained.

  Further, even when the distance between the door A and the door frame B varies, it is possible to secure a sufficient distance for the latch bolt 10 to move in the left-right direction so that a sufficient locking force can be maintained. The control means 10 may be configured so that the screw portion 13 can be moved in the vertical direction as much as possible. In this case, it is not necessary to change the position of the wedge 14, and adjustment after construction can be made unnecessary.

  Further, when the latch bolt 10 is moved in order to change from the locked state to the unlocked state, the latch bolt 10 and at least one wedge 14 are fitted, so that the latch bolt 10 is moved by the movement of the wedge 14. Can be guided. Accordingly, it is not necessary to provide an urging means for separately moving the latch bolt 10 from the locked state to the unlocked state, and parts can be reduced. Further, since the urging means is not provided on the latch bolt 10, when the latch bolt 10 is moved from the unlocked state to the locked state, it is not necessary to move the wedge 14 in opposition to the urging force. 13 power can be reduced, and power saving can be achieved.

  In addition, since the wedge buffer portion 18 is provided to reduce the impact on the wedge 14 during the unlocking operation, the failure that the wedge 14 becomes inoperable due to being bitten into the screw portion 13 by the impact during the unlocking operation is reduced. Further, since it is possible to facilitate activation when unlocking and reversing the lock, it is possible to improve reliability.

  In addition, since the latch bolt buffering portion 19 is provided to reduce the impact on the latch bolt 10 during movement, the impact on the latch bolt 10 at the time of locking and unlocking can be reduced. As a result, the impact on the wedge 14 can be mitigated, so that it is possible to reduce malfunctions that cause the wedge 14 to become inoperable due to biting into the screw portion 13, and to start when the unlocking and locking are reversed. Therefore, the reliability can be improved.

  Next, a lock device according to a second embodiment of the present invention will be described. Here, only matters different from those in the first embodiment will be described, and other matters (configuration, operational effects, and the like) are the same as those in the first embodiment, and thus description thereof will be omitted.

  5-7, the control means 11 has the electric motor 12 which has a rotating shaft, and the screw part 13 which is connected to the electric motor 12 and rotates with the rotational power of the electric motor 12, and the wedge 14 is a screw | thread. The screw part 13 is screwed so as to move by the rotation of the part 13. Moreover, the screw thread 13c of the screw part 13 is rectangular. Further, the control means 11 has a predetermined impact force to start the movement of the wedge 14, and the electric motor 12 covers the periphery of the screw portion 13 and transmits the rotational power to the screw portion 13. The screw portion 13 has a taper 13d at a part of the connecting portion with the drive gear 12a, and the drive gear 12a has a protrusion 12b so as to have a predetermined distance from the taper 13d.

  Hereinafter, the locking device of this embodiment will be described in more detail. As shown in FIG. 5, the electric motor 12 is connected to the screw portion 13. The electric motor 12 can generate rotational driving by a motor or the like, and has a driving gear 12 a that transmits rotational power to the screw portion 13. The screw portion 13 connected to the drive gear 12a rotates with the central axis of the screw portion 13 as a rotation axis.

  The wedge 14 is provided with a through hole 14c through which the screw portion 13 can pass, and a female screw (not shown) is formed on the inner surface of the through hole 14c so that the screw portion 13 can be screwed. Is provided. Here, as shown in FIG. 6, the fastening force between the screw portion 13 and the wedge 14 can be reduced by making the screw thread 13 c of the screw portion 13 rectangular.

  Further, as shown in FIG. 7A, the electric motor 12 has a drive gear 12 a that covers the periphery of the screw portion 13 and transmits rotational power to the screw portion 13. Further, the screw portion 13 has a taper 13d at a part of the connection portion with the drive gear 12a. The drive gear 12a is provided with a protrusion 12b so as to have a predetermined distance Y from the taper 13d. As shown in FIGS. 7B and 7C, when the motor 12 is started, the drive gear 12a rotates around the screw portion 13 in the direction of the arrow. After the start-up, after a predetermined time, the projecting portion 12b collides with the taper 13d, a predetermined impact force can be generated in the screw portion 13, and the rotation can be started, and further, the drive gear 12a continues to rotate, The protruding portion 12b continues to push the taper 13d, and the screw portion 13 continues to rotate. Since the predetermined impact force is generated in the screw portion 13 to start the rotation, the movement of the wedge 14 can be started with the predetermined impact force.

  As the screw portion 13 rotates, the wedge 14 screwed with the screw portion 13 can move in the longitudinal direction of the screw portion 13. Control of the movement direction of the wedge 14 can be realized by controlling the rotation direction of the screw gear 13 by controlling the rotation direction of the drive gear 12 a by the electric motor 12. For example, as shown in FIG. 5, when the screw portion 13 is a right-hand screw, the wedge 14 moves downward and the latch bolt 10 moves leftward when rotated counterclockwise as viewed from the Z direction. Unmated and unlocked. On the contrary, when it rotates in the clockwise direction, the wedge 14 moves upward and the latch bolt 10 moves to the right and engages with the catch 20 and is locked.

  Therefore, the control means 11 has an electric motor 12 having a rotating shaft and a screw part 13 connected to the electric motor 12 and rotated by the rotational power of the electric motor 12, and the wedge 14 is moved by the rotation of the screw part 13. Since the screw part 13 is screwed to the screw part 13, the movement direction of the wedge 14 can be changed by controlling the rotation direction of the electric motor 12. Thus, by controlling the rotation of the electric motor 12, the movement of the latch bolt 10 due to the movement of the wedge 14 can be controlled, and the door A can be locked and unlocked. Further, even when the movement distance of the latch bolt 10 is long and the movement distance of the wedge 14 is necessary, the movement distance of the wedge 14 can be increased by increasing the rotation angle of the screw portion 13. The means 11 can be reduced in size.

  Moreover, since the screw thread 13c of the screw part 13 is rectangular, the fastening force of the screw part 13 can be reduced, and the occurrence of malfunction due to the latch bolt 10 being engaged with the screw part 13 can be reduced. it can.

  And since the control means 11 has a predetermined impact force and starts the movement of the wedge 14, even when the wedge 14 becomes inoperable due to biting into the screw portion 13, the biting is performed. It can be canceled. As a result, it is possible to reduce failures that become inoperable due to the wedges 14 biting into the threaded portions 13, so that reliability can be improved.

  The electric motor 12 has a drive gear 12a that covers the periphery of the screw portion 13 and transmits rotational power to the screw portion 13. The screw portion 13 has a taper 13d at a part of a connection portion with the drive gear 12a. Since the drive gear 12a is provided with the projection 12b so as to have a predetermined distance from the taper 13d, the projection 12b of the drive gear 12a tapers the screw 13 after a predetermined time after the motor 12 is started. The rotational drive of the screw part 13 can be started by contacting 13d. Thus, the drive gear 12a can have a running section, and when the protrusion 12b comes into contact with the taper 13d, the screw portion 13 can be started to rotate with a predetermined impact force. As a result, even when the wedge 14 is caught in the screw portion 13, the biting can be released by starting the rotational drive of the screw portion 13 accompanied by an impact force.

  Next, a lock device according to a third embodiment of the present invention will be described. Here, only matters different from those in the first and second embodiments will be described, and other matters (configuration, operational effects, etc.) are the same as those in the first and second embodiments, and therefore the description thereof. Is omitted.

  As shown in FIGS. 8 and 9, the latch bolt 10 has two inclined surfaces 10 a having an angle, and the screw portion 13 is composed of a right screw 13 a and a left screw 13 b with the vicinity of the center as a boundary. ing. In addition, two wedges 14 are screwed into the screw portion 13, and one wedge 14 abuts against one inclined surface 10 a of the latch bolt 10 and is screwed into the right screw 13 a of the screw portion 13. The wedge 14 is in contact with the other inclined surface 10 a of the latch bolt 10 and screwed with the left screw 13 b of the screw portion 13.

  As shown in FIG. 9, when the locking device is in the unlocked state, the two wedges 14 maintain a state where they are separated from each other in the longitudinal direction of the screw portion 13. From this state, when the screw portion 13 is rotated about the central axis by the rotational power of the electric motor 12, the wedges 14 that are screwed into the right screw 13a and the left screw 13b move toward each other. It will be. By the movement of the wedge 14, each inclined surface 14a of the wedge 14 pushes the two inclined surfaces of the latch bolt 10, respectively, and the latch bolt 10 moves rightward to be locked.

  Moreover, the operation | movement at the time of unlocking from a locked state produces | generates the rotational power to the direction opposite to the time of locking the electric motor 12, and rotates the screw part 13 in the direction opposite to the time of locking. As a result, the wedge 14 screwed into the screw portion 13 moves in a direction opposite to that at the time of locking, that is, moves away from each other. As the wedge 14 moves, the latch bolt 10 moves to the right and is unlocked by the guide mechanism constituted by the convex portion 10b of the latch bolt 10 and the concave portion 14b of the wedge 14.

  Accordingly, the latch bolt 10 has at least two inclined surfaces 10a having an angle, and the screw portion 13 is composed of a right screw 13a and a left screw 13b with the vicinity of the center as a boundary. Is in contact with one inclined surface 10a of the latch bolt 10 and is engaged with the right screw 13a of the screw portion 13, and the other wedge 14 is in contact with the other inclined surface 10a of the latch bolt 10 and Since the left screw 13 b is fitted, the latch bolt 10 can be supported by the plurality of wedges 14. Thereby, the movement of the latch bolt 10 can be made more stable. Further, the wedge 14 can move in the opposite direction by the rotation of the screw portion 13. When the wedge 14 moves away, the latch bolt 10 moves in the unlocking direction. When the wedge 14 moves in the approaching direction, the latch bolt 10 can move in the locking direction. it can. Thus, the movement of the latch bolt 10 due to the movement of the plurality of wedges 14 can be controlled without adding a new electric motor 12 and screw portion 13, and the number of parts can be reduced.

  Next, a lock device according to a fourth embodiment of the present invention will be described. Here, only matters different from those in the first to third embodiments will be described, and other matters (configuration, operational effects, etc.) are the same as those in the first to third embodiments, and thus the description thereof. Is omitted.

  As shown in FIGS. 10 to 12, the wedge 14 includes a through hole 14 c and a nut flange 140 disposed in the through hole 14 c, and the nut flange 140 is a nut portion that fits into the screw portion 13. 140a, and a flange 140b disposed at both ends of the nut portion 140a and outside the through hole 14c. Further, the distance between both flanges 140b of the nut flange 140 is larger than the length of the through hole 14c. Further, a corrugated washer 140c, which is a nut flange cushioning portion, is provided between the wedge 14 and at least one flange 140b.

  As shown in FIG. 10, the nut flange 140 includes a nut portion 140a at the center, and a donut-shaped flange 140b at both ends of the nut portion 140a. At least one of the flanges 140b has a flat portion 140d in part.

  As shown in FIG. 11, the nut flange 140 is disposed in the through hole 14 c of at least one wedge 14. A certain clearance is provided between the through hole 14c and the nut portion 140a of the nut flange 140, and the nut flange 140 can move up and down and right and left in the through hole 14c. Moreover, since both the flanges 140b are arrange | positioned on the outer side of the wedge 14, the nut flange 140 does not remove | deviate from the through-hole 14c. Further, the nut flange 140 is disposed in the through hole 14c so that the flat portion 140d of the flange 140b is brought into contact with the mounting plate 15. Since the flat portion 140d is in contact with the mounting plate 15, the nut flange 140 can be moved in the vertical direction without rotating even when the screw portion 13 rotates.

  When the locking device is in the unlocked state, the two wedges 14 are maintained in a state of being separated from each other in the longitudinal direction of the screw portion 13. From this state, when the screw portion 13 is rotated about the central axis by the rotational power of the electric motor 12, the wedges 14 that are screwed into the right screw 13a and the left screw 13b move toward each other. It will be. As shown in FIG. 12, when the nut flange 140 is disposed on the lower wedge, the nut flange 140 moves upward by the rotation of the screw portion 13, and the lower flange 140 b moves on the lower surface of the wedge 14. By pushing up, the wedge 14 moves upward. By the movement of the wedges 14, the inclined surfaces 14a of the wedges 14 respectively push the two inclined surfaces of the latch bolt 10, and the latch bolt 10 moves to the right and enters the locked state.

  Moreover, the operation | movement at the time of unlocking from a locked state produces | generates the rotational power to the direction opposite to the time of locking the electric motor 12, and rotates the screw part 13 in the direction opposite to the time of locking. As a result, the wedge 14 screwed into the screw portion 13 moves in a direction opposite to that at the time of locking, that is, moves away from each other. Regarding the downward movement of the lower wedge 14, the nut flange 140 moves downward by the rotation of the screw portion 13, and the upper flange 140 b pushes the upper surface of the wedge 14 downward, so that the wedge 14 is lowered. Move in the direction. Further, the movement of the wedge 14 causes the latch bolt 10 to move to the left by the guide mechanism constituted by the convex portion 10b of the latch bolt 10 and the concave portion 14b of the wedge 14 to be unlocked.

  Furthermore, by providing the corrugated washer 140c between the flange 140b and the wedge 14 and between the flange 140b and the stopper 16, the impact force from the nut flange 140 to the wedge 14 during unlocking and locking can be reduced. it can. Moreover, it is possible to adjust the impact force to the wedge 14 by changing the gap between the flange 140b and the wedge 14.

  Therefore, the wedge 14 includes a through-hole 14c and a nut flange 140 provided in the through-hole 14c. The nut flange 140 is a nut portion 140a fitted to the screw portion 13 and both ends of the nut portion 140a. And the flange 140b disposed outside the through-hole 14c, the nut flange 140 is moved by the rotation of the screw portion 13, and the flange 14b moves the wedge 14 by pushing the side surface of the wedge 14. Can do. As a result, the nut flange 140 can be interposed in the rotation of the screw portion 13 and the movement of the wedge 14, and the application of a radial load to the screw portion 13 can be reduced. Can improve reliability.

  Furthermore, since the distance between both flanges 140b of the nut flange 140 is larger than the length of the through hole 14c, a gap can be provided between the flange 140b and the wedge 14. Thus, the distance between the flange 140b and the wedge 14 can be changed by changing the distance between both flanges 140b, and the impact on the wedge 14 by the nut flange 140 when the locking and unlocking are reversed. Since the force can be set arbitrarily, it is possible to reduce the occurrence of malfunction due to biting of the wedge 14 into the screw portion 13.

  Further, since the corrugated washer 140c, which is a nut flange cushioning portion made of a cushioning material or an elastic material, is provided between the wedge 14 and at least one flange 140b, the nut flange 140 at the time of locking or unlocking is provided. The impact on the wedge 14 can be mitigated, and the occurrence of malfunction due to the wedge 14 biting into the screw portion 13 can be reduced.

It is the (a) block diagram which showed the locking device which is 1st Embodiment of this invention, (b) The top view which showed fitting of a latch bolt and a catch. It is the whole perspective view showing the state where the lock device was attached to the door and the door frame. It is the (a) schematic block diagram and (b) sectional drawing in the fitting state of the latch bolt and wedge of the locking device. It is a partially-omission figure which shows the catch part of the locking device. It is the block diagram which showed the locking device which is 2nd Embodiment of this invention. It is sectional drawing of the thread of the thread part in the locking device. It is the schematic sectional drawing which showed the structure of the drive gearwheel and screw part of the electric motor in the lock device. It is a block diagram of the locking device which is the 2nd Embodiment of this invention. It is the schematic block diagram which showed the structure of the thread part in a locking device, a wedge, and a latch bolt. It is the perspective view which showed the nut flange in the locking device which is the 2nd Embodiment of this invention. It is the schematic block diagram which showed the structure of the thread part in a locking device, a wedge, and a latch bolt. It is the (a) front view and (b) sectional view showing the nut flange buffer part (wave type washer) in the lock device. It is the block diagram which showed the locking device which is a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Latch part 10 Latch bolt 10a Inclined surface 11 Control means 12 Electric motor 12a Drive gear 12b Protrusion part 13 Screw part 13a Right screw 13b Left screw 13c Screw thread 13d Taper 14 Wedge 14c Through-hole 140 Nut flange 140a Nut part 140b Flange 140c Nut Buffer part 18 Wedge buffer part 19 Latch bolt buffer part 2 Catch part 20 Catch 21 First displacement member 22 Second displacement member 24 Connecting member A Door B Door frame

Claims (12)

  In a locking device that locks and unlocks a door, the latch device includes a latch portion disposed on either the door or the door frame, and a catch portion disposed on either the door or the door frame. Has a latch bolt that is movable in a direction perpendicular to the opening and closing direction of the door, and a control means for controlling the movement of the latch bolt. The catch portion is a catch that engages with the latch bolt, and the catch is a latch bolt. And the latch bolt has an inclined surface inclined with respect to the moving direction on the side opposite to the side engaged with the catch, and the control means has an inclined surface of the latch bolt. One or more wedges that can move the latch bolt in a direction perpendicular to the door opening and closing direction and change the position of the latch bolt at the time of locking or unlocking. Yes Locking device according to claim Rukoto.   The control means includes an electric motor that generates rotational power and a screw portion that is connected to the electric motor and rotates by the rotational power of the electric motor, and the wedge is screwed into the screw portion so as to move by the rotation of the screw portion. 2. The locking device according to claim 1, wherein:   The latch bolt has at least two inclined surfaces having an angle, and the threaded portion is composed of a right screw and a left screw with a boundary near the center, and one wedge hits one inclined surface. The locking device according to claim 2, wherein the locking device is engaged with the right screw of the screw portion, and the other wedge is in contact with another inclined surface and is engaged with the left screw of the screw portion.   4. The locking device according to claim 2, wherein the thread of the threaded portion is rectangular.   The locking device according to any one of claims 1 to 4, wherein the latch bolt and at least one wedge are fitted.   The locking device according to any one of claims 1 to 5, further comprising a wedge buffer portion that reduces a shock to the wedge during the unlocking operation.   The locking device according to any one of claims 1 to 6, further comprising a latch bolt buffer portion that reduces an impact on the latch bolt during movement.   The locking device according to any one of claims 1 to 7, wherein the control means has a predetermined impact force to start the movement of the wedge.   The electric motor includes a drive gear that covers the periphery of the screw portion and transmits rotational power to the screw portion. The screw portion has a taper at a part of a connection portion with the drive gear. The locking device according to any one of claims 2 to 8, further comprising a protrusion so as to have an interval of.   The wedge includes a through hole and a nut flange disposed in the through hole. The nut flange is disposed on the outer side of the through hole at both ends of the nut portion and the nut portion. The locking device according to claim 2, further comprising: a flange that is formed.   The locking device according to claim 10, wherein a distance between both flanges of the nut flange is larger than a length of the through hole.   The lock device according to claim 10 or 11, wherein a nut flange buffering portion is provided between the wedge and at least one of the flanges.

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