JP2016084632A - External electric lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an external electric lock of a simple mechanism, operated on a small installation area, for managing locking/unlocking of a plane handle.SOLUTION: An external electric lock includes an electric lock body 11 fitted on a rack door 3 in a direction of a pull-up tip of a plane handle 2, which is also a longer-side direction of the plane handle 2, and a prohibiting bar 12 of which a base part is supported on the electric lock body 11 and a tip covers at least the pull-up tip of the plane handle 2. The prohibiting bar 12 may be rotated in a forward direction to enable opening operation of the plane handle 2, at the same time including a lock mechanism and a controller 15 that prohibit rotation of the prohibiting bar 12 in the forward direction in response to a signal received from outside, the lock mechanism comprising a solenoid 13, a plunger 13a, and an engaging piece 14. Operation of the plane handle 2 is prohibited when controlled by the controller 15.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electric lock that is externally attached to a rack in order to prohibit an opening operation of a flat handle provided in a rack that houses a server and communication equipment.

  In the data center, a large number of server racks storing servers are installed. Conventional server racks were managed so that they could not be opened without permission by a cylinder lock provided on a flat handle provided on the door. However, since many server racks are installed in the data center, / Racks with electric locks that can be managed in a batch are widely used.

However, in an existing data center using a rack that is unlocked / locked by a cylinder lock provided on a flat handle, replacing all racks with electric locks requires a large-scale operation. However, the cost for that is also large.
For this reason, there is an electric lock that can be installed from above the flat handle to enable collective management of locking / unlocking. For example, in the external electric lock of Patent Document 1, an electric lock main body that allows a tongue piece (lock bar) that cannot be opened to a flat handle to be retracted is attached to a portion adjacent to the flat handle, and a locking signal is externally received. The tongue piece is exposed to a position covering the flat handle to prohibit the opening operation, and the unlocking signal is received to retract the tongue piece to enable the opening operation.

JP 2008-169626 A

By assembling the external electric lock of Patent Document 1 to a conventional rack, it becomes possible to collectively manage unlocking / locking of individual racks without replacing the rack itself.
However, since this external electric lock requires a mechanism to move the lock bar in and out, it requires a relatively large mounting area and must be installed adjacent to either the left or right of the flat handle. However, there were cases where it could not be installed easily.

  In view of the above problems, an object of the present invention is to provide an external electric lock capable of managing the unlocking / locking of a flat handle with a simple mechanism and a small installation area.

In order to solve the above-mentioned problem, the invention of claim 1 is an external device that is mounted to engage with a flat handle provided on a door and manages whether or not the flat handle can be opened by receiving an external signal. An electric lock body that is attached to a door in the direction of the leading edge of the flat handle, and a bar that is supported by the base portion of the electric lock body and has a tip that at least causes the flat handle to cover the leading edge. The prohibiting bar can be rotated forward so that the opening operation of the flat handle can be performed, and on the other hand, a lock mechanism for prohibiting the prohibiting bar from rotating forward in response to an external signal and its control unit The operation of the plane handle is prohibited by the prohibition control of the control unit.
According to this configuration, the external electric lock only needs to be provided with a mechanism for prohibiting the rotation of the prohibition bar, and can be reduced in size with a simple structure. Moreover, since it is installed in the longitudinal direction of the flat handle, it can be attached more easily than installing it on the side where the installation area is limited.

According to a second aspect of the present invention, in the configuration according to the first aspect of the present invention, there is provided a prohibition releasing means that enables the prohibition bar to rotate forward regardless of the control of the control unit.
According to this configuration, the rack can be opened by the prohibition releasing means regardless of the state of the flat handle, and it is easy to cope with an emergency such as a power failure.

  According to the present invention, the external electric lock only needs to be provided with a mechanism for prohibiting the rotation of the prohibition bar, and can be reduced in size with a simple structure. Moreover, since it is installed in the longitudinal direction of the flat handle, it can be attached more easily than installing it on the side where the installation area is limited.

It is a perspective view which shows an example of the external electric lock which concerns on this invention, and has shown the state with which it mounted | wore with respect to the plane handle. (A) is a front view of FIG. 1, (b) is a side view. It is a section explanatory view of an external electric lock, and shows an AA line section. It is operation explanatory drawing of an external electric lock, and has shown the side. It is a rear view of an external electric lock.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. 1 and 2 show an example of an external electric lock according to the present invention, showing a state where it is attached to a flat handle. 1 is a perspective view, FIG. 2 (a) is a front view, FIG. 2 (b) is a side view, 1 is an external electric lock, 2 is a flat handle, and 3 is a part of a rack door. Further, 1a is an LED for displaying the state of the external electric lock 1, 1b is a cylinder lock provided on the external electric lock 1, and 2a is a cylinder lock provided on the flat handle 2.

The flat handle 2 is composed of an operating handle 21 for opening and closing, and a flat handle main body 22 in which a cylinder lock 2a is incorporated and a housing portion 2b of the operating handle 21, and the base of the operating handle 21 is a flat handle. The flat handle main body 22 is fixed to the rack door 3 while being rotatably supported by the main body 22.
Specifically, the support portion of the flat handle 2 is arranged in the upper portion and arranged vertically, and the lower end portion is raised to tilt the operation handle 21 forward (shown in FIG. 4), so that the rack door 3 is opened. The rack door 3 can be opened by rotating and pulling.

  The cylinder lock 2a is incorporated in the flat handle body 22, and the operation handle 21 is provided with a window 2c for operating the cylinder lock 2a. Locking the cylinder lock 2a in a state where the operation handle 21 is housed in the housing portion 2b prohibits the operation handle 21 from being raised forward, and the rack door 3 cannot be opened.

Next, the external electric lock 1 will be described with reference to FIGS. 3 to 5 show the external electric lock 1, FIG. 3 is a cross-sectional explanatory view showing a cross section taken along line AA, FIG. 4 is an operation explanatory view, and FIG. 5 is a rear view. The external electric lock 1 has an electric lock main body 11 fixed to the rack door 3 and a prohibition bar 12 whose base end is pivotally supported by the electric lock main body 11 and rotates in the front-rear direction. It is formed longer than the electric lock body 11, and the tip protrudes from the electric lock body 11.
4 shows a state in which the prohibiting bar 12 is rotated forward and opened, and the prohibiting bar 12 can be rotated from the closed state shown in FIG. 3 to a position tilted forward shown in FIG. .

The protruding portion L protruding from the electric lock body 11 of the prohibiting bar 12 is a portion that overlaps with the flat handle 2 and prohibits the operation of the flat handle 2, and this protruding portion L causes at least the flat handle 2 to cover the tip portion. Placed in. Specifically, the lower portion of the flat handle 2 is on the central axis M of the flat handle 2 as shown in FIG. 2 (a) and covers at least the tip of the operation handle 21 as shown in FIG. 2 (b). Installed.
In addition, 19 shown in FIG. 5 is a screw hole for fixing to an attachment object, and the electric lock main body 11 is fixed to the rack door 3 with screws.

The external electric lock 1 includes a lock mechanism that inhibits the prohibition bar 12 from rotating forward and a control unit that controls the lock mechanism. This will be specifically described with reference to FIG. In FIG. 3, 13 is a solenoid, 13a is a plunger that moves back and forth on the central axis of the solenoid 13, 14 is a locking piece that prohibits the prohibition bar 12 from rotating forward, and 15 is a control signal transmitted from the outside. The control unit 16 receives and controls the solenoid 13 and the LED 1a, and 16 is a transmission line that sends a control signal and supplies a driving current for driving the solenoid from the outside. The cylinder lock 1b is incorporated in the prohibition bar 12, and the solenoid 13, The locking piece 14, the control unit 15, and the LED 1 a are incorporated in the electric lock body 11.
The solenoid 13, the plunger 13a, and the locking piece 14 constitute a lock mechanism, and the prohibition bar 12 is provided with a display window 12a that exposes the LED 1a.

  The locking piece 14 is pivotally supported by the plunger 13a and can be rotated in the vertical direction. The tip of the locking piece 14 is urged by the torsion coil spring 17 toward the prohibition bar 12 (downward). In a normal state where the solenoid 13 is not in an operating state, the plunger 13a is exposed downward, the locking piece 14 projects downward, and the locked piece 18 provided on the prohibiting bar 12 is locked. As a result, the prohibition bar 12 is prevented from rotating forward.

The operation of the external electric lock configured as described above and the rack opening / closing operation are as follows. The external electric lock 1 is connected to an electric lock control device (not shown) wirelessly via a wired or wireless transmitter / receiver, and operates by receiving a control signal.
First, in the normal state, the external electric lock 1 is in a locked state, and the prohibiting lever 12 cannot be pulled forward. Specifically, in an off state in which no operating current flows through the solenoid 13, the plunger 13a protrudes downward and is in the state shown in FIG. In this state, as described above, the locked piece 18 of the prohibiting bar 12 is locked to the locking piece 14, and the prohibiting bar 12 cannot be rotated forward. That is, since the prohibition bar 12 covering the front of the flat handle 2 cannot be moved, the cylinder lock 2a cannot be unlocked. Naturally, it is impossible to pull the operation handle 21 forward and rotate it, and the rack cannot be opened.

In this state, when an unlocking signal is transmitted from the electric lock control device, the control unit 15 recognizes it and applies a drive current to the solenoid 13. This drive current is supplied via the transmission line 16. Then, a magnetic force is generated in the solenoid 13 and the plunger 13a is attracted and raised. As a result, the locking piece 14 is also raised and the engagement with the locked piece 18 is released, and the prohibiting lever 12 can be rotated forward.
On the other hand, the control part 15 which received the unlocking signal lights LED1a, for example, LED emits light in blue. In this way, the unlocked state is displayed in a flashing manner, and the operator can recognize that the forbidden handle 12 can be tilted forward, and the forbidden bar 12 is pulled forward to unlock the flat handle 2 and the rack door 3. The opening operation is performed.
In addition, since the unlocking and opening operation of the flat handle 2 is the same as the conventional one, the description is omitted.

Thus, under the control of the control unit 15, the drive current of the solenoid 13 flows for a certain period of time, and the rack door 3 can be opened during that time. When a certain time has elapsed, energization of the drive current is terminated, the solenoid 13 is turned off, the plunger 13a is lowered, and the locking piece 14 is moved to the first release prohibiting position.
However, the closing operation of the prohibiting bar 12 can be performed regardless of the position of the locking piece 14. By the closing operation of the open prohibiting bar 12, the locked piece 18 turns the locking piece 14 into the elastic force of the torsion coil spring 17. Push against it and rotate to enter the locking position. When the closing operation is completed, the locked piece 18 is locked again on the locking piece 14, and the subsequent opening operation is prohibited.

  On the other hand, the action of the cylinder lock 1 b incorporated in the prohibition bar 12 has priority over the control of the control unit 15. Specifically, the tongue piece protruding and retracting by the cylinder lock 1b is the locked piece 18, and when the cylinder lock 1b is unlocked, the locked piece 18 moves backward and the engagement with the locking piece 14 is released. As a result, the rotation operation of the prohibition bar 12 is always possible regardless of the position of the plunger 13a.

As described above, the external electric lock 1 only needs to be provided with a mechanism for prohibiting the rotation of the prohibition bar 12 and can be miniaturized with a simple structure. Moreover, since it is installed in the longitudinal direction of the flat handle 3, it can be attached more easily than installing it on the side where the installation area is limited.
Moreover, the rack can be opened by the cylinder lock 1b regardless of the state of the flat handle 1, and it is easy to cope with an emergency such as a power failure.

In the above-described embodiment, the drive current to be energized to the solenoid 13 is energized for a certain period of time, and the opening operation can be normally performed during that period. However, the energization of the drive current to the solenoid 13 is started by the unlocking signal, and the locking is separately performed. A signal may be transmitted to stop energization of the drive current.
Moreover, although LED1a is lighted and it has displayed that it can unlock, you may display an unlockable state by changing a light emission color or changing from lighting to blinking.

  1 ・ ・ External electric lock, 1a ・ ・ LED, 1b ・ ・ Cylinder lock (prohibition release means), 2 ・ ・ Plane handle, 3 ・ ・ Rack door (door), 11 ・ ・ Electric lock body, 12 ・ ・ Prohibited Bar, 13. Solenoid (locking mechanism), 13a. Plunger (locking mechanism), 14. Locking piece (locking mechanism), 15. Control part, 18. Locked piece.

Claims (2)

An external electric lock that is mounted to engage with a flat handle provided on the door and that controls the open / close operation of the flat handle in response to an external signal,
An electric lock body mounted on the door in the direction of the leading edge of the flat handle, and a bar which is supported by the base of the electric lock main body and has a tip covering at least the leading edge of the flat handle;
The prohibition bar can be rotated forward so that the flat handle can be opened, and a lock mechanism for prohibiting the prohibition bar from rotating forward in response to an external signal and its Having a control unit,
An external electric lock, wherein operation of the flat handle is prohibited by prohibition control of the control unit. The external electric lock according to claim 1, further comprising prohibition release means that enables the prohibition bar to rotate forward regardless of the control of the control unit.

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