JPH06264658A - Electric lock with automatic locking mechanism - Google Patents

Abstract

PURPOSE:To conduct locking and unlocking instantaneously by applying an electric lock to a swing door and rotating a motor in the single direction in the electric lock driven by the motor. CONSTITUTION:A locking bar 2, a trigger bolt 7 and a latch bolt 4 are installed so as to be projected from one side face of a casing 1 to the outside, and a worm gear 9 annexed to the shaft 8a of a motor 8 is engaged with a spur gear 10. A pin 11 is protruded to one surface of the spur gear and a cam 12 to the other surface, and a sliding lever 15 is slid by the pin while a latch hold 14 interposed between the cam and the latch bolt is driven by the cam. A locking-bar fixing piece 3 is interposed between the sliding lever and the locking bar and a latch fixing piece 5 between the sliding lever and the latch bolt, and locking and unlocking are controlled by regular rotation in one direction of the spur gear.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric lock equipped with an automatic locking mechanism suitable for use in a bidirectional swing type door.

[0002]

[Prior art and its problems] Various types of electric locks having an automatic locking mechanism have been used so far, and there is a wide variety of products that are mounted on the door in the form of a digging lock. Is being supplied.

What is common to these products is whether or not the door is at the position to be locked accurately is detected by a detection means separate from the lock, and after that, for example, a dead bolt is attached to the door frame. The point is that it is a type to rush into the installed seat.

However, even if such a detecting means is provided, due to the malfunction of the door due to the malfunction of the operation timing or the change over time, the dead bolt which is undesirably projected collides with the door frame and damages the lock and its surroundings. There are also accidents that cause malfunctions.

The door to which the automatic lock type lock is attached is
It is either inward or outwardly opened, and many conventional locks cannot be applied to bidirectional swing doors.Even if it is said that it can be applied to bidirectional swing doors, it is functionally or structurally No one could achieve a sufficient effect.

Further, since it is an electric type automatic locking mechanism, a driving means such as an electric motor or an electromagnet for locking or unlocking is incorporated inside the lock box, so that the momentum lock box must be large. However, there is also a drawback that the place where the lock is attached is limited.

Further, in the case where the electric motor is used for final tightening and final locking, it takes time for the dead bolt to project and retract, and a device capable of operating instantaneously has not been supplied.

In addition, electrical wiring is required for electrical operation, and when the lock is attached to the door, special electrical wiring is required between the door frame and the door. There was also.

In the case of an ordinary door, it is possible to use a hinge or the like having a built-in electrical contact, but if the usage time elapses after installation, inconveniences such as poor contact, unnecessary conduction, etc. occur, so-called maintenance. In many cases, practicality is not recognized at all.

In the case of a two-way swing type door, since a general hinge cannot be used, a type using a movable contact such as a so-called contact pivot installed on the pivot axis of the door at the hanging position is adopted. However, even in that case, the same inconvenience as in the above case occurs due to the change over time.

As a means for solving these problems, a method is often adopted in which a pivot portion is bored and the hole is used to electrically connect the door frame to the door by direct wiring. With direct wiring, every time the door is removed from the door frame for management and maintenance, it is almost always possible to break the wire.
It is hard to say that it is practical.

Further, when at least the electric motor is used as the driving means, it is necessary to reverse the rotational direction of the electric motor between forward and reverse for locking and unlocking. For that purpose, in addition to various detection switches for the locking mechanism, It was necessary to prepare an extra switch, and the bulky structure was inevitable.

In the conventional locking device, in order to cope with the opening / closing tendency of the bidirectional swing type door in both the inner and outer directions, the latch head is made to have a special structure and the strength is sacrificed to cope with the problem. In order to solve the bulkiness of the box, there were many structures that ignored safety, such as simplifying the mechanism inside the lock box and locking all with a single latch bolt.

[0014]

In a general manual lock device, an operator first places a door or the like to be locked at an accurate closed position and then rotates a key or the like to lock the door. At the same time, check work to determine the proper position of the door and work to check whether the lock device is operating properly when turning the key are performed at the same time. Is
By repeating that part, the door is properly closed and locked.

In an electric lock equipped with an automatic locking mechanism,
Since there is usually a large distance between the control panel to be operated and the electric lock, it is necessary to perform such a confirmation work mechanically or electrically. The need for complex use has arisen.

What needs to be checked is whether the door is in the open or closed position, and whether the latch bolt and the dead bolt correctly face their corresponding receiving seats when the door is in the closed position. There are two points.

When the electric lock is driven, if the dead bolt is operated by rotating the electric motor in the forward and reverse directions, the rotation of the worm gear rotated by the electric motor is transmitted to a general spur gear. Moreover, since the design of converting it into the linear motion of the deadbolt is unavoidable, the problem that the operating speed of the locking device becomes slow is unavoidable.

[0018]

In order to solve such a problem, the applicant of the present invention made an invention of Japanese Patent Application No. 2-43589 "Electrical lock with automatic locking mechanism" and embeds it in a door frame. Presented a form of electric lock. In the invention, in order to make the electrical wiring simpler, the type of attaching the locking device to the door is abandoned, the locking device is attached to the door frame, and the size of the casing is embedded in the door frame. Various efforts have been made to make the size as small as possible.

In the present invention, in order to prevent the safety of the lock from being lowered, the present locking means (for example, Kannuki), temporary locking means (for example, latch bolt) and temporary locking and fixing means (for example, latch fixing piece) are used in combination, and The structure of the present invention, which allows the locking to be doubled by two parts of the latch bolt, is followed as it is, and the size reduction of the casing is limited to some extent, and a simpler part structure is pursued.

Further, for the bidirectional swing of the door shown in the above invention, the structure of the latch bolt which is the temporary locking means is devised so that the door can be opened and closed in any direction. I followed the point that I did.

In order to eliminate the need for switching between forward and reverse rotation of the electric motor, the locking and unlocking operation can be performed only by rotating the electric motor in one direction, and the rotation of the electric motor is transmitted to the disc gear. However, by rotating the gear in only one direction, temporary locking (unlocked state in which the latch works), complete continuous unlocking (unlocked state in which the latch does not work), and locking are performed.

Further, when retracting the chestnut into the casing for unlocking, a spring is actuated so that the chestnut is always biased in the unlocking direction so that the electric motor is not overloaded. I tried to be able to unlock it instantaneously with the utmost power.

In these concrete constitutions, a hook, a trigger bolt and a latch bolt are installed so as to project from one side surface of the casing to the outside, and a worm gear attached to a rotating shaft of an electric motor is meshed with a spur gear. , A pin is provided on one surface of the spur gear and a cam is projected on the other surface, and the sliding rod is slid by the pin, and depending on the cam, the latch hold interposed between the cam and the latch bolt is driven to slide. We decided to control the locking and unlocking by inserting a hook fixing piece between the moving rod and the hook and a latch fixing piece between the sliding rod and the latch bolt, and by turning the spur gear in one direction. .
The trigger bolt is used to control the latch fixing piece.

[0024]

Embodiments of the present invention will be described with reference to the drawings.
In FIG. 1 showing a locked state, 1 is a casing, and 2 is a cannula which is installed in the casing 1 so as to be able to move in and out freely, and a spring (not shown) is given a tendency to always shift into the casing 1.

Reference numeral 3 denotes a fixed fixing piece, which is attached to the casing 1 by a fixing fixing piece shaft 3a. A fixing projection 3b is installed at one end of the fixing piece 3 and the fixing projection 3b is shown in FIG. The cannula 2 is fixed in a state of protruding from the casing 1 by coming into contact with the inner end step portion 2 a of the cannula 2 housed inside the casing 1. Further, an engagement projection 3c is provided on the hook fixing piece 3 and a tendency to rotate counterclockwise about the shaft 3a is provided by a spring (not shown).

Reference numeral 4 denotes a latch bolt which is slidably received in the casing 1, slidable with respect to the casing 1, and has one end protruding outside the casing 1. The protruding end 4a is a swing in both directions of the door. It has a mountain-shaped inclined surface (not shown) to correspond to the operation. Further, engaging teeth 4b are provided on the inner end of the latch bolt 4.

Reference numeral 5 is a latch fixing piece, which is a latch fixing piece shaft 5a.
Is axially attached to the casing 1 by a spring (not shown), and is biased by a spring (not shown) so as to rotate counterclockwise about the latch fixing piece shaft 5a. It has a fixing end portion 5b that abuts against 4c.

Further, the latch fixing piece 5 has a first protrusion 5c.
And a second protrusion 5d are installed, and a spring 6 is suspended on these two protrusions, and one end 6a of the spring 6 largely protrudes from the end of the latch fixing piece 5.

Reference numeral 7 denotes a trigger bolt which is installed in the casing 1 so that it can be freely moved in and out, and one end 7a of which is protruded outside the casing 1. The arm portion 7b installed in the casing 1 has the trigger bolt 7 When protruding from the casing 1 (when the door is opened), the first protrusion 5c of the latch fixing piece 5 is scooped up and moved to a position where the fixing end 5b does not hinder the movement of the latch bolt 4.

Reference numeral 8 is an electric motor, and a worm gear 9 rotated by its rotation shaft 8a is meshed with a spur gear 10. The spur gear 10 has a pin 11 on one surface thereof and a pin 11 on the other surface thereof. The cam 12 is provided so as to project. The cam 12 has a cylindrical shape in which a part of the peripheral surface is cut off to form a flat surface portion 12a, and the spur gear 10 and the cam 12 rotate about a shaft 13.

Reference numeral 14 denotes a latch hold, which is axially attached to the casing 1 by a latch hold shaft 14a.
It is biased by a spring (not shown) so as to rotate counterclockwise around 4a. In addition, the latch hold 14 includes a contact leg 14 b that contacts the circumferential surface of the cam 12,
Engaging leg 14c capable of engaging with the engaging tooth 4b of the latch bolt 4
When the contact leg 14b contacts the peripheral surface of the cam 12, the contact leg 14b swings around the latch hold shaft 14a by the rotation of the cam 12.

A sliding rod 15 transmits the rotational movement of the spur gear 10 to the latch fixing piece 5 and the hook fixing piece 3.
The sliding rod 15 allows the indentation of the first guide groove 16 for the pin 11 of the spur gear 10 to move inward and the engaging protrusion 3c of the fixed hook 3 and presses the engaging protrusion 3c. Guide groove 1
7 and a pressing protrusion 18 for pressing one end 6a of the spring 6 of the latch fixing piece 5.

To explain the operation, FIG. 1 shows a completely locked state, in which the latch 2 and the latch bolt 4 project into the corresponding receiving seats (not shown) installed on the door, and the trigger bolt 7 is inserted. Is pressed into the casing 1 by coming into contact with the surface number (not shown) of the receiving seat. In this state, the hook 2 is fixed to the protruding position by the fixing protrusion 3b of the hook fixing piece 3, and the latch bolt 4 is fixed to the protruding position by the fixing end 5b of the latch fixing piece 5.

When unlocking the electric motor 8 from the state shown in FIG.
Spur gear 1 which is energized to mesh with the worm gear 9
0 is rotated counterclockwise in the figure. When the spur gear 10 rotates, the pin 11 and the cam 12 also rotate integrally, and the pin 11 moves in the first guide groove 16 of the sliding rod 15 in which it is recessed and presses it. The sliding rod 15 is pushed rightward in the figure to move it to the position shown in FIG.

When the sliding rod 15 is moved to the position shown in FIG. 2, the second guide groove 17 of the sliding rod 15 is also moved to press the engaging projection 3c of the recessed fixing member 3 of the latch, The clamp fixing piece 3 resists the action of the spring and the clamp fixing axis 3
It is rotated clockwise about a, and its fixing projection 3b
Since the pressed state between the inner end step portion 2a of the hook 2 and the hook 2 is released as shown in FIG. 2, the hook 2 is instantaneously drawn into the casing 1 by the action of the biasing spring and is set at the position shown in FIG.

At the same time, as the sliding rod 15 moves, the pressing projection 18 also moves and presses one end 6a of the spring 6 of the latch fixing piece 5 projecting in the moving path thereof, so that the pressing force of the spring 6 is exerted on the spring 6. Is transmitted to the mounted second protrusion 5d,
The latch fixing piece 5 is rotated clockwise about the latch fixing piece shaft 5a against the action of the spring, and the fixing end portion 5b is released from the contact with the inner end portion 4a of the latch bolt 4. It will move to the position of FIG. This allows the latch bolt 4 to be retracted into the casing 1.

Further, the spur gear 10 with the sliding rod 15 moved.
1 to FIG. 2, the cam 12 is rotated by 180 degrees, and the latch hold 1 which is in contact with the circumferential surface of the cam 12 is rotated.
The contact leg 14b of No. 4 is brought into contact with the flat surface portion 12a of the cam 12. Since the flat portion 12a has a shape obtained by cutting the circumferential surface of the cam 12 in a plane as described above, the contact leg 14b changes the contact position from the circumferential surface of the cam 12 to the flat portion 12a. The latch hold 14 rotates counterclockwise around the latch hold shaft 14a against the action of the spring, and rotates from the position shown in FIG. 1 to the position shown in FIG. By this rotation, the tips of the engaging legs 14c of the latch hold 14 project as shown in FIG. 2 on the movement line of the engaging teeth 4b of the latch bolt 4.

As described above, the shift from the locked state to the unlocked state is completed. At this time, the positions of the trigger bolt 7 and the latch bolt 4 are in the state of FIG. 2, and the position of the latch 2 is in the state of FIG. It will be. And the door with the locking device installed is not yet opened, but the door can be opened anytime.

When the door is opened in this state, the latch bolt 4
Is pushed by the receiving seat and retracts into the casing 1, and its engaging teeth 4b are caught by the tips of the engaging legs 14b and fixed at the retracted position as shown in FIG. Further, the trigger bolt 7 is released from the face plate of the receiving seat and projects to the outside of the casing 1, and at the same time, the arm portion 7b scoops up the first protrusion 5c of the latch fixing piece 5 to fix the latch fixing piece 5 as shown in FIG. . The state when the door is opened after unlocking in this way is as shown in FIG.

When the door is closed and the door is opened further from the state shown in FIG. 3, the trigger bolt 7 is simply retracted and protruded repeatedly, and the latch bolt 4 and the latch 2 are continuously fixed in the state shown in FIG. In this state, since the latch bolt 4 does not come into contact with the receiving seat when the door is opened and closed in the unlocked state, the latch sound when the door is opened and closed is completely removed.
Extremely quiet door opening and closing is guaranteed.

Next, in order to obtain a general state in which the latch bolt 4 repeatedly projects and retracts when the door is opened and closed, the electric motor 8 is further rotated from the state shown in FIG. 3 and the spur gear 10 is slightly rotated by the rotation of the worm gear 9. The cam 12 is rotated so that the boundary between the flat surface 12a of the cam 12 and the circumferential surface presses the contact leg 14b of the latch hold 14, and the latch hold 14 slightly moves from the position of FIG. 3 around the latch hold shaft 14a. It is sufficient to rotate in the direction of the formula and to release the engagement between the tip of the engaging leg 14c and the engaging tooth 4b of the latch 4 as shown in FIG. The rotation of the spur gear 10 from FIG. 3 to FIG. 4 does not affect the positions of the latch fixing piece 3 and the latch fixing piece 5, only the latch bolt 4 is opened, and the positional relationship of other parts is It is in the same position as in FIG.

When the door is closed from the state shown in FIG. 4, the latch bolt 4 once retracts into the casing 1 and then projects into the receiving seat. When the door is opened again, the latch bolt 4 is pressed by the receiving seat and once retracts into the casing 1. When the door is open, it projects again and the latch bolt 4 can temporarily fix the door.

In order to lock the door after the door is closed from the state of FIG. 3 or 4, the worm gear 9 is rotated by the electric motor 8 and the spur gear 10 is rotated to reach the position shown in FIG. The second guide groove 17 of the sliding rod 15 slid by the above pushes the engaging projection 3c to the left in the figure, so that the fixed hook 3 is counterclockwise about the fixed hook shaft 3a. Since the fixing projection 3b pushes the inner end step 2a of the sleeve 2 downward in the figure, the sleeve 2 is pushed out of the casing 1 against the action of the spring and simultaneously slides. Since the pressing projection 18 of the rod 15 also releases the pressing of the end 6a of the spring 6, the latch fixing piece 5
Rotates in the counterclockwise direction about the latch fixing piece shaft 5a under the action of the spring, and all return to the state of FIG. 1 to complete the locking.

In the present embodiment, a plurality of microswitches for detecting the positions of the components installed inside the casing are not shown in order to avoid complexity of the drawing.

[0045]

According to the present invention, the electric motor 8 is only rotated in one direction to lock, unlock the latch bolt 4 by pulling it in the casing 1 and fix it, and unlock the latch bolt 4 so that it can project and retract. It is possible to obtain two states, and it is possible to obtain an electric lock that can be locked and unlocked by Kannuki 2 in an instant.

[Brief description of drawings]

FIG. 1 is an internal explanatory diagram of a locked state according to an embodiment of the present invention.

FIG. 2 is an internal explanatory diagram of a state where the latch just before reaching the unlocked state in which the latch bolt of the embodiment of the present invention is fixed is opened.

FIG. 3 is an internal explanatory diagram of an unlocked state in which the latch bolt of the embodiment of the present invention is fixed.

FIG. 4 is an internal explanatory diagram of an unlocked state in which a latch bolt of the embodiment of the present invention is opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Kannuki 2a Inner end step 3 Kannuki fixing piece 3a Kannuki fixing piece Shaft 3b Fixing projection 3c Engaging projection 4 Latch bolt 4a Projecting end 4b Engaging tooth 4c Inner end 5 Latch fixing piece 5a Latch fixing piece Shaft 5b Fixing end portion 5c First protrusion 5d Second protrusion 6 Spring 6a One end of spring 7 Trigger bolt 7a Arm portion 8 Electric motor 8a Rotating shaft 9 Worm gear 10 Spur gear 11 Pin 12 Cam 12a Flat portion 13 Shaft 14 Latch hold 14a Latch hold shaft 14b Abutment leg 14c Engagement leg 15 Sliding rod 16 First guide groove 17 Second guide groove 18 Pressing protrusion

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hideki Hori 11-27 Sachimotocho, Anjo City, Aichi Prefecture Dai-no-Otake Building 502 (72) Inventor Yasushi Eiki, 7430, 2430 Yamazaki, Noda City, Chiba Prefecture

Claims (3)

[Claims] 1. An electric lock in which a casing accommodates a latch bolt, a hook and a driving electric motor, and a hook which is urged in a direction of being drawn into the casing by the action of a spring, and the hook is pushed to a protruding position and fixed. Fixing piece for fixing, latch fixing piece for fixing the latch bolt at a position protruding from the casing, latch hold for fixing the latch bolt at a position where the latch bolt is pulled into the casing, the fixing piece and latch fixing An automatic locking mechanism including a sliding rod for operating one piece, a cam for operating the latch hold, a pin for operating the sliding rod, and a spur gear driven by an electric motor. Electric lock. 2. The automatic locking mechanism according to claim 1, further comprising a trigger bolt for maintaining a latch fixing piece for fixing the latch bolt at a position projecting from the casing when the door is opened. Electric lock. 3. An unlocked state in which the latch bolt is fixed in a state of being pulled into the casing, and an unlocked state in which the latch bolt protrudes from the casing and is retractable into the casing can be obtained. An electric lock equipped with an automatic locking mechanism.