JP7025096B2 - Locking device - Google Patents

Description

The present invention relates to a locking device capable of locking / unlocking by either electric input or manual input.

In recent years, a locking device generally called an "electric lock" or the like, which can be locked / unlocked without a key by electric input, is becoming widespread. However, such a locking device (electric lock) can be locked / unlocked not only by electric input but also by manual input using a conventional key or thumb turn in case of an emergency such as a power outage. It needs to be a structure that can be used.

For example, in the electric lock proposed in Patent Document 1, the rear end portion of the dead bolt held so as to be linearly movable in the lock case is operated integrally with the final driven gear rotatably supported by the lock case. It is engaged with an arm, the final driven gear is connected to the drive motor via multiple gears, and an engagement hole for manual input is made in the center of the final driven gear. The rotation is transmitted to the final driven gear via each gear, and the operating arm rotates to linearly move the dead bolt to lock and unlock. At the time of manual input, the rotation is relative to the engagement hole of the final driven gear. Locking / unlocking is performed by turning the key inserted into the keyhole of the cylinder that is impossibly inserted, or by turning the thumb turn connected to the cylinder and moving the dead bolt linearly via the actuating arm. ..

Japanese Unexamined Patent Publication No. 4-368580

By the way, with an electric lock as described above, it is necessary to be able to lock / unlock by either electric input or manual input, so a conventional lock that locks / unlocks only by manual input (hereinafter, "machine"). Compared to "locks"), the structure is complicated and the overall size is inevitably larger. In addition, for entrance doors and the like, it is necessary to always carry a remote controller for electric input and a key for manual input in an emergency, which may be annoying.

Therefore, depending on the installation space and application of the lock, it may be required to change the specifications from the electric lock to the mechanical lock immediately before the installation, or to replace the electric lock with the mechanical lock after the installation. In order to smoothly respond to such demands, it is sufficient to prepare a mechanical lock that can be easily replaced with the electric lock for each type of electric lock, but if such a product system is to be prepared, it is designed and manufactured. There is a lot of waste in the process.

Therefore, it is an object of the present invention to provide a locking device that can be used as an electric lock in a normal form and can also be used as a mechanical lock by separating the main body portion from the electric drive portion.

In order to solve the above problems, the present invention relates to an electric drive unit having a drive device operated by energization, a first input member linearly driven by the drive device, a dead bolt, and the first input member. A first motion conversion mechanism that converts a linear motion into an advance / retreat motion of the deadbolt, a second input member that is rotationally driven by a manual input from a key or a thumb turn, and a rotary motion of the second input member of the deadbolt. In a locking device including a main body portion having a second motion conversion mechanism for converting forward / backward motion, the electric drive section and the main body section are each unitized, and the first input member becomes a first motion conversion mechanism. It is detachably connected, and by separating the first input member from the first motion conversion mechanism, the electric drive unit and the main body portion are separated, and the main body portion can be used as a single mechanical lock. The configuration was adopted.

Here, the dead bolt may be fastened by a fastening member in a state where two plate-shaped members arranged in parallel in the advancing / retreating direction are opposed to each other at a predetermined interval. By doing so, the dead bolt can be made lighter, the entire locking device can be made lighter, and the dead bolt can be easily connected to other parts.

As described above, the locking device of the present invention has an electric drive unit having a first input member linearly driven by the drive device, and a first motion conversion that converts the linear motion of the first input member into a deadbolt advance / retreat motion. The main body having the second operation conversion mechanism that converts the rotation operation of the second input member by the mechanism and the manual input into the advance / retreat operation of the dead bolt is unitized, and can be used as an electric lock in the normal form, and the first input member is the first. 1 By separating from the operation conversion mechanism, the main body can be separated from the electric drive unit and used as a mechanical lock. Therefore, the specifications can be changed from the electric lock immediately before installation to the mechanical lock, and the electricity after installation can be changed. It is possible to smoothly respond to requests for replacement of locks with mechanical locks.

External perspective view of the locking device of the embodiment Front view showing the outline of the internal structure of the locking device of FIG. External perspective view of the dead bolt of the locking device of FIG. a and b are front views for explaining the operation of the electric drive unit at the time of locking by the electric input corresponding to FIG. 2, respectively. a and b are front views illustrating the operation of the main body when locked by electric input corresponding to FIG. 2, respectively. a and b are front views illustrating the operation of the electric drive unit at the time of unlocking by electric input corresponding to FIG. 2, respectively. Front view showing a state in which the electric drive unit and the main body unit are separated according to FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, this locking device has a rectangular parallelepiped upper case 11 which is a housing of an electric drive unit 10 and a rectangular parallelepiped lower case 21 which is a housing of a main body 20 in the longitudinal direction. The end faces of the two cases are butted against each other and arranged vertically, and as will be described later, a part of each internal component is connected between the electric drive unit 10 and the main body unit 20, and a connecting plate covering one side surface of both cases 11 and 21. 1 and the upper plate 2 and the lower plate 3 stacked on the surface of the connecting plate 1 are screwed to both cases 11 and 21, so that the unitized electric drive unit 10 and the main body 20 are integrated. be. In each of the cases 11 and 21, two lid-shaped case members are integrated with each other by a screw or the like, and FIG. 2 shows a case member of one of the cases 11 and 21 (front side in FIG. 1). Shows the removed state.

The side wall, the connecting plate 1 and the lower plate 3 on one side of the lower case 21 are provided with openings 4 at two upper and lower positions for infesting the dead bolt 22 of the main body portion 20, as will be described later. Further, oval holes 21a (the back side is not shown) for connecting the cylinder to the main body 20 are formed in the side walls of the front surface and the back surface of the lower case 21. The abutting surfaces of the upper case 11 and the lower case 21 are provided with an opening for connecting a part of the internal parts as described above.

In the upper case 11, the electric drive unit 10 includes a drive motor 12 as a drive device, a plurality of batteries 13 as a drive source of the drive motor 12, and a worm gear 14 attached to an output shaft of the drive motor 12. The worm wheel 15 that meshes with the worm gear 14, the gear group 16 that transmits the rotation of the worm wheel 15 to the driven side, the rack 17 connected to the driven side of the gear group 16, and the rack 17 are supported in a linear motion. , A rail-shaped slider 18 that is held so as to be able to move linearly in the same direction as the rack 17 is housed.

Here, the gear group 16 includes a first gear that integrally rotates on the same axis as the worm wheel 15, a second gear that meshes with the first gear, and a third gear and a third gear that integrally rotate on the same axis as the second gear. It consists of a 4th gear that meshes with the 4th gear, a 5th gear that rotates integrally with the 4th gear, and a rack gear that meshes with both the 5th gear and the rack 17, and decelerates the rotation of the worm wheel 15 and transmits it to the rack gear. The rack 17 is linearly moved by the rotation of the gear. Each gear constituting the worm wheel 15 and the gear group 16 is rotatably supported by a support shaft provided on the upper case 11.

The rack 17 is provided with teeth that mesh with the rack gear on one side wall thereof, and is provided with a concave groove extending in the longitudinal direction on the back surface side. The concave groove is partitioned by an engaging portion 17a provided in the center in the longitudinal direction, and ridges 18a provided on the surface of the slider 18 are fitted into both side portions of the engaging portion 17a. As a result, when the rack gear rotates, the engaging portion 17a is guided by the slider 18 and linearly moves independently until the engaging portion 17a abuts on the convex strip 18a of the slider 18 in the traveling direction, and the engaging portion 17a is convex on the slider 18. After abutting on the strip 18a, it moves linearly with the slider 18.

The slider 18 is a first input member that is linearly driven by the drive motor 12 as described above. Then, the lower end portion protrudes from the upper case 11 and enters the lower case 21, and is connected to a part of the internal parts of the main body portion 20 by a protrusion 18b provided on the surface of the lower end portion, as will be described later.

On the other hand, the main body portion 20 has a dead bolt 22 held in the lower case 21 so as to be able to move forward and backward toward one side of the lower case 21 (the tip portion can appear and disappear from the lower case 21), and a slider 18. The first motion conversion mechanism 23 that converts linear motion into the forward / backward motion of the deadbolt 22, the hub gear 24 as the second input member that is rotationally driven by manual input from the key or thumb turn, and the rotary motion of the hub gear 24 are deadbolts. It houses a second motion conversion mechanism 25 that converts the forward / backward motion of the 22 into forward / backward motion, and a holding mechanism 26 that holds the position of the dead bolt 22 in the forward / backward direction.

Here, as shown in FIG. 3, the dead bolt 22 is a plurality of fastening members in a state where two plate-shaped members 22a and 22b arranged in parallel in the advancing / retreating direction are opposed to each other at a predetermined interval. It is fastened by the rivet 22c (only a part of which is shown). As a result, the dead bolt 22 itself becomes lighter, which contributes to the weight reduction of the entire locking device, and has a structure that can be easily connected to other parts.

As shown in FIG. 2, the dead bolt 22 as a whole is formed in a substantially H shape having four arm portions in a plan view, and the two plate-shaped members 22a and 22b of the two tip side arm portions are formed. In between, the hook plate 27 is rotatably attached in a plane parallel to the both plate-shaped members 22a and 22b. Each hook plate 27 has a hook portion 27a on the distal end side facing one side of the lower case 21 and a hook portion 27b on the proximal end side close to the rotation fulcrum. The base end side hook portion 27b is in contact with one side of a substantially rectangular frame member 28 that is partially opened in a plan view when the entire dead bolt 22 is in the lower case 21 (retracted). The frame member 28 is fixed to the lower case 21 with screws or the like (not shown).

Further, on one of the rear end side arm portions of the dead bolt 22, each plate-shaped member 22a and 22b are provided with a recess 22d that engages with the first motion conversion mechanism 23 as described later, and the rear end side arm portion is provided. On the other hand, the plate-shaped members 22a and 22b are provided with elongated holes 22e for avoiding interference with the second motion conversion mechanism 25, as will be described later.

The first motion conversion mechanism 23 is a link plate 29 connected to the slider 18 of the electric drive unit 10, and a link rotatably supported by the lower case 21 and engaged with both the link plate 29 and the dead bolt 22. It consists of an arm 30. The link plate 29 and the link arm 30 are also constituent members of the second motion conversion mechanism 25, as will be described later.

The link plate 29 has engaging portions extending in a direction orthogonal to the longitudinal direction at both ends in the longitudinal direction of the strip portion having an L-shaped cross section extending in the same direction as the slider 18, and one end (upper end) thereof is engaged. A long hole 29a for engaging with the link arm 30 is provided at the joint portion, and a long hole 29b (for engaging with a part of the second motion conversion mechanism 25) is provided at the engaging portion at the other end (lower end). (See FIG. 5 (b)) is provided. Then, the protrusion 18b at the lower end of the slider 18 is fitted into the connecting hole 29c provided in the strip portion, so that the protrusion 18b is detachably connected to the slider 18 and linearly moves integrally.

The link arm 30 is composed of an annular base rotatably attached to the lower case 21 and two arms 30a and 30b extending radially outward from the base, and is provided at the tip of one of the arms 30a. The pin 30c is inserted into the elongated hole 29a on one end side of the link plate 29 to engage with the link plate 29, and the tip of the other arm 30b is inserted into the recess 22d on the rear end side of the dead bolt 22 to form the dead bolt 22. Engaged.

Then, in the first motion conversion mechanism 23, when the slider 18 moves linearly, the link plate 29 moves linearly integrally with the slider 18, and the link arm 30 engaged with the link plate 29 by one arm 30a rotates. The other arm 30b of the link arm 30 pushes the dead bolt 22 to advance or retreat the dead bolt 22.

The hub gear 24 is rotatably supported on the outer peripheral side by a guide member 31 fixed to the lower case 21, and a cylinder (not shown) is inserted into an engagement hole 24a provided at the center so as to be relatively non-rotatable. It is rotationally driven by a key inserted into the keyhole at one end of the cylinder or a manual input from a thumb turn connected to the other end of the cylinder. A partial gear 24b for engaging with a part of the second motion conversion mechanism 25 is provided on a part of the outer periphery of the hub gear 24 as described later.

The second motion conversion mechanism 25 includes a link plate 29 and a link arm 30, which are also constituent members of the first motion conversion mechanism 23, and a link gear 32 that connects the link plate 29 to the hub gear 24.

The link gear 32 is arranged between the two plate-shaped members 22a and 22b of the dead bolt 22, and has an annular base that is rotatably supported by a support shaft 33 fixed to the lower case 21. It is composed of two arms 32a and 32b extending radially outward from the base portion, and a partial gear 32c that meshes with the partial gear 24b of the hub gear 24 is provided on a part of the outer periphery of the base portion. The support shaft 33 that supports the base thereof is passed through the elongated holes 22e of the plate-shaped members 22a and 22b of the deadbolt 22 so as not to interfere with the deadbolt 22 even if the deadbolt 22 advances and retreats. .. Then, the pin 32d provided at the tip of one of the arms 32a is inserted into the elongated hole 29b on the other end side of the link plate 29 to engage with the link plate 29 (see FIG. 5B), and the other The tip of the arm 32b is connected to a part of the holding mechanism 26 as described later.

In the second motion conversion mechanism 25, when the hub gear 24 rotates, the link gear 32 that meshes with the hub gear 24 rotates in the opposite direction, and the link plate 29 that engages with one arm 32a of the link gear 32 moves linearly. Then, when the link plate 29 moves linearly, the link arm 30 rotates to advance and retreat the dead bolt 22 in the same manner as the operation of the first motion conversion mechanism 23 described above.

The holding mechanism 26 includes a rotation shaft 35 rotatably attached to the lower case 21, a spring support shaft 36 fixed to the rotation shaft 35 while penetrating the rotation shaft 35 in the radial direction, and a spring support. It is composed of a coil spring 37 mounted on the outer periphery of the shaft 36.

The tip of the spring support shaft 36 is rotatably connected to the other arm 32b of the link gear 32, and the coil spring 37 is sandwiched between the rotating shaft 35 and the other arm 32b of the link gear 32 in a compressed state. ing.

In this holding mechanism 26, the coil spring 37 urges the other arm 32b of the link gear 32 in a direction away from the rotation shaft 35, which is the same as the rotation direction of the link gear 32 at the time of the immediately preceding locking / unlocking operation. By applying a rotational force in the direction, the position in the rotational direction of the link gear 32 and thus the position in the advancing / retreating direction of the dead bolt 22 are maintained until the next locking / unlocking operation is performed.

Next, the locking / unlocking operation by the electric input or the manual input of this locking device will be described below. First, as shown in FIGS. 1, 2, 4 (a) and 5 (a), when the entire dead bolt 22 is housed in the lower case 21 and is in the unlocked state, the dead bolt 22 is retracted. The link plate 29 of the main body 20 and the slider 18 of the electric drive 10 are located at the upper limit. In this unlocked state, the rack 17 of the electric drive unit 10 is in a neutral position at the center of the electric drive unit 10 in the neutral position where it meshes with the rack gear at the driven side end of the gear group 16, and the engaging portion 17a on the back surface side of the rack 17 is the slider 18. It is set in a state of being in contact with the ridge 18a on the lower side of the surface.

When the drive motor 12 is driven by the electric signal instructing the lock from the above unlocked state (when the electric input is performed), the driving force is applied to the rack 17 via the worm gear 14, the worm wheel 15, and the gear group 16. , The rack 17 presses the lower ridge 18a of the slider 18 downward with the engaging portion 17a. Then, as shown in FIGS. 4 (b) and 5 (b), when the slider 18 linearly moves downward together with the rack 17, the link plate 29 is integrated with the slider 18 by the action of the first motion conversion mechanism 23 described above. Moves linearly downward, the link arm 30 rotates, the dead bolt 22 advances to the forward limit, and its tip portion protrudes from the lower case 21.

At this time, the two hook plates 27 attached to the dead bolt 22 advance together with the dead bolt 22 in the first half of the advance process of the dead bolt 22 by guiding the hook portion 27b on the base end side to the frame member 28, respectively. Then, in the latter half, the hooks 27a on the tip side are rotated in opposite directions so that the hook portion 27a on the tip side protrudes above and below the dead bolt 22. Then, the tip of the dead bolt 22 enters the receiving hole of the receiving seat (not shown), and the hook portion 27a on the tip side of each hook plate 27 enters into the recesses provided on the upper and lower surfaces of the receiving hole, so that the locked state is obtained. Will be.

Further, at this time, with the linear movement of the link plate 29, the driven side and the driving side of the second motion conversion mechanism 25 are reversed, the link gear 32 rotates, and the hub gear 24 that meshes with the driven side also rotates. At the same time, the rotation of the link gear 32 causes the spring support shaft 36 and the rotation shaft 35 of the holding mechanism 26 to rotate integrally, and the coil spring 37 exerts a rotational force on the link gear 32 in the same direction as the rotation direction in the current locking operation. In addition, the position in the rotation direction of the link gear 32 and thus the position in the advance / retreat direction of the dead bolt 22 are maintained. By the action of this holding mechanism 26, the locked state is held until the next unlocking operation is performed.

Then, when the locking operation is completed as described above, the drive motor 12 is temporarily stopped and then rotated in the opposite direction to linearly move the rack 17 upward, and the rack 17 is in the neutral position as shown in FIG. 6A. When it returns to, the drive motor 12 stops. At this time, since the engaging portion 17a of the rack 17 does not push the slider 18, the locked state is maintained. As will be described later, the control of the rack 17 position is for shortening the time required for the unlocking operation by the next electric input, and is a sensor and a control device for detecting that the rack 17 is in the neutral position (both). (Not shown).

When the drive motor 12 is driven by an electric signal instructing unlocking from the above locked state (the electric drive unit 10 is in the state of FIG. 6A), the parts of the electric drive unit 10 and the main body 20 are locked. It operates in the opposite direction to the time, and the entire dead bolt 22 is housed in the lower case 21 to be in the unlocked state (the electric drive unit 10 is in the state shown in FIG. 6B), and the holding mechanism 26 holds the unlocked state. Will hold.

Here, before the drive motor 12 is driven, the engaging portion 17a of the rack 17 comes into contact with the ridge 18a on the upper side of the slider 18 as shown in FIG. 6A by the rack 17 position control described above. Since it is set to the state, when the drive motor 12 is driven, the linear movement of the slider 18 starts upward without a time lag, and the unlocking operation can be completed in a short time as compared with the case where the rack 17 position control is not performed. ..

After the unlocking operation is completed, the rack 17 is in the upper limit position as shown in FIG. 6B, but the rack 17 position control rotates the drive motor 12 in the reverse direction to move the rack 17 to the neutral position. Therefore, the state returns to the states of FIGS. 4 (a) and 5 (a).

On the other hand, when the hub gear 24 is rotationally driven by a manual input from a key or a thumb turn, the link gear 32 rotates and the link plate 29 moves linearly due to the action of the second motion conversion mechanism 25 described above. Similarly, the link arm 30 rotates, the dead bolt 22 advances and retreats, the locking / unlocking operation is performed, and the state after the operation is held by the holding mechanism 26.

In the locking / unlocking operation by the manual input described above, the slider 18 of the electric drive unit 10 also moves linearly together with the link plate 29, but the rack 17 does not move from the neutral position, so that the rack 17 position control described above is performed. Not done.

This locking device has the above configuration, and the electric drive unit 10 and the main body unit 20 are each unitized, and the slider 18 of the electric drive unit 10 is the link plate 29 of the first operation conversion mechanism 23 of the main body unit 20. Since it is detachably connected to, it can be used as an electric lock in the normal form. As shown in FIG. 7, the connecting plate 1, the upper plate 2 and the lower plate 3 are removed from the upper case 11 and the lower case 21, and the slider 18 is used. The electric drive unit 10 and the main body portion 20 can be separated from each other by separating the main body portion 20 from the link plate 29, and the main body portion 20 can be used alone as a mechanical lock.

Therefore, it is possible to smoothly respond to the specification change from the electric lock to the mechanical lock immediately before the installation and the request to replace the electric lock with the mechanical lock after the installation. In addition, at the time of manufacturing, electric locks and mechanical locks can be easily manufactured from one type of design according to the order status, etc., so that the efficiency of the design / manufacturing process can be improved.

The locking device of the present invention is not limited to the one of the above-described embodiment, and the electric drive unit and the main body portion are each unitized, and the first input member of the electric drive unit becomes the first operation conversion mechanism of the main body portion. It suffices as long as it is detachably connected and the electric drive unit and the main body portion are separated by separating the first input member from the first motion conversion mechanism.

For example, in the embodiment, a drive motor 12 is used as a drive device for an electric drive unit, and the driving force thereof is applied to the rack 17 via a worm gear 14, a worm wheel 15, and a gear group 16, and the rack 17 and the slider 18 are linearly moved. However, it is also possible to use a solenoid actuator as a driving device and directly move the slider linearly by the driving force. In that case, parts from the worm gear to the rack are not required, and the structure of the electric drive unit can be simplified.

1 Connecting plate 2 Upper plate 3 Lower plate 4 Opening 10 Electric drive 11 Upper case 12 Drive motor 13 Battery 14 Worm gear 15 Worm wheel 16 Gear group 17 Rack 18 Slider (first input member)
18b Protrusion 20 Main body 21 Lower case 22 Dead bolts 22a, 22b Plate-shaped member 22c Rivets (fastening members)
23 1st motion conversion mechanism 24 Hub gear (2nd input member)
25 Second motion conversion mechanism 26 Holding mechanism 27 Hook plate 28 Frame member 29 Link plate 29c Connecting hole 30 Link arm 31 Guide member 32 Link gear 33 Support shaft 35 Rotating shaft 36 Spring support shaft 37 Coil spring

Claims (2)

An electric drive unit having a drive device operated by energization and a first input member linearly driven by the drive device.
A dead bolt, a first motion conversion mechanism that converts the linear motion of the first input member into an advance / retreat motion of the dead bolt, a second input member that is rotationally driven by a manual input from a key or a thumb turn, and the second. A main body having a second motion conversion mechanism that converts the rotational motion of the input member into the advancing / retreating motion of the dead bolt.
In a locking device equipped with
The electric drive unit and the main body portion are each unitized, and a first input member protruding from the housing of the electric drive unit is first inside the housing of the main body portion abutted with the housing of the electric drive unit . It is detachably connected to the motion conversion mechanism, and by separating the first input member from the first motion conversion mechanism, the electric drive unit and the main body portion are separated, and the main body portion alone serves as a mechanical lock. It will be usable,
The main body portion is provided with two openings for infesting the dead bolt, and the dead bolt has two tip-side arm portions infested from each opening of the main body portion. A locking device characterized in that the entire body including the tip side arm portion is integrally formed. The first aspect of the present invention is characterized in that the dead bolt is formed by fastening two plate-shaped members arranged in parallel in the advancing / retreating direction by a fastening member in a state of facing each other at a predetermined interval. The locking device described.

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