JP2004108116A - Door lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door lock device for easily checking a state of engagement between a locking hook and an engaging part. <P>SOLUTION: The door lock device comprises a tongue 4 which is provided with the locking hook 2 on a door side and the engaging part 3 engaged with the locking hook 2. The tongue 4 may be operated to move back and forth by using both of a cylinder lock 5 for a user and a cylinder lock 6 for a manager. A stroke of the tongue 4 in its projecting direction caused by the cylinder lock 6 for the manager is formed to be larger than that of the cylinder lock 5 for the user. A detecting passage 7 is arranged at an extended part of the stroke by which the tongue 4 is allowed to pass only when the engaging part 3 is within a range engageable with the locking hook 2. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a door lock device.
[0002]
[Prior art]
In order to prevent the door from being forcibly opened in a locked state, a door lock device configured to open an engaging portion on a tongue and lock a locking hook on the door side is disclosed in, for example, Patent Document 1. Are known.
[0003]
In this conventional example, the locking hook attached to the door detects the separation between the door and the door frame when the door is illegally opened, and engages with the engaging portion. Connect to prevent the door from opening.
[0004]
[Patent Document 1]
JP-A-11-280310
[Problems to be solved by the invention]
However, the above-described prior art has the following disadvantages. That is, in the above-mentioned conventional example, since the insertion path of the tongue to the door side is not restricted at all, it is possible to operate the tongue forward and backward even if the door is mounted to be shifted up and down, for example.
[0006]
On the other hand, since the lockable area of the locking hook to the engagement portion is limited, when the strike position shift on the door side occurs, the locking hook is attached to the engagement portion of the tongue in the closed state. In some cases, the door may not be locked, and in this state, the locking hook cannot be engaged with the engagement portion, so that a predetermined resistance to an unauthorized opening operation on the door is not exerted.
[0007]
However, there is a problem that reliability is low because it is not possible to confirm from the appearance whether or not the locking hook and the engaging portion are in a mutually engageable positional relationship.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described drawbacks, and has as its object to provide a door lock device capable of easily confirming an engagement state between a locking hook and an engagement portion.
[0009]
[Means for Solving the Problems]
According to the invention, the object is
A door lock device in which a tongue 4 having an engaging portion 3 with which a locking hook 2 on the door 1 is engaged can be operated by both a user cylinder lock 5 and an administrator cylinder lock 6. The protruding direction stroke of the tongue 4 by the administrator cylinder lock 6 is formed larger than that of the user cylinder lock 5, and the engagement portion 3 is engaged with the locking hook 2 on the stroke extension. This is achieved by providing a door lock device provided with a detection passage 7 that allows passage of the tongue 4 only when the tongue 4 is in the stoppable range.
[0010]
The door lock device is configured to lock and unlock the door 1 by moving the tongue 4 toward and away from the door 1, and the locking hook 2 on the door 1 side is engaged with the engaging portion 3 opened on the tongue 4 in the locked state. After that, the tongue 4 and the door 1 are connected to each other, so that an unauthorized door opening operation using a tool such as a bur is impossible.
[0011]
The tongue 4 can be operated not only by the cylinder lock 5 for the user but also by the cylinder lock 6 for the administrator so that the unlocking operation can be performed by the administrator when the user leaves the locked state. The protrusion stroke of the tongue 4 is set to be longer in the case of the cylinder lock 6 for the administrator than in the case of the cylinder lock 5 for the user.
[0012]
The stroke extension portion is provided with a detection passage 7 through which the tongue 4 can pass only when the tongue 4 is in a range in which the locking hook 2 can be engaged, and in a non-engageable range, the tip of the tongue 4 abuts.
[0013]
Therefore, in the present invention, when the locking hook 2 and the engaging portion 3 do not coincide with each other because the door 1 or the like is displaced, the tongue 4 cannot be moved to the end of the stroke by using the administrator cylinder lock 6. . The fact that the tongue 4 cannot move to the end of the stroke can be easily known from, for example, the inability to rotate the cylinder lock 6 for the administrator to the end of the stroke. The installation position, distortion, and the like of the door 1 can be reliably confirmed.
[0014]
Further, since the detection passage 7 is provided only in the stroke extension part, even if the door 1 or the like is displaced, the locking and unlocking operation by the user cylinder lock 5 is possible. Even if the time is shifted, the use by the user is secured.
[0015]
In order to know that the administrator cylinder lock 6 cannot be rotated to the end of the stroke, for example, it is sufficient to write the rotation stroke end position of the administrator cylinder lock 6 on the surface of the lock case 8. As another means,
The administrator's cylinder lock 6 is engaged with the user's cylinder lock 5 to hold the user's cylinder lock 5 in the lock case 8, and near the end of the cylinder lock rotation stroke corresponding to the stroke extension. In the above, the cylinder lock holder 9 that enables the user to remove the user cylinder lock 5 by releasing the engagement with the user cylinder lock 5 can be connected.
[0016]
In this case, after the installation of the door lock device or after the maintenance is completed, the operator operates the cylinder lock 6 for the administrator to check whether or not the user's cylinder lock 5 can be pulled out, and the engagement with the engagement portion 3 is achieved. It can be determined whether the hook 2 is engaged.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
1 and 2 show an embodiment of the present invention configured as a coin locker lock. In FIG. 1, reference numeral 10 denotes a door lock disposed on the side of the frame 11, reference numeral 1 denotes a door, and reference numeral 1a denotes a handle for fixing the opening of the door 1 near an edge. The coin insertion slot 10a opened in the door lock 10 is partially covered and hidden by the handle 1a when the door is closed, so that coin insertion is disabled and, for example, erroneous insertion of a coin during use is prevented.
[0018]
In order to lock and unlock the door 1, the door lock 10 includes a tongue 4 that moves forward and backward toward the door 1. As shown in FIG. 2, the tongue 4 is a plate-like body having a predetermined plate thickness, and two engaging portions 3 with which a later-described locking hook 2 engages penetrate in the plate thickness direction at the tip portion. It is provided in a rectangular hole shape.
[0019]
As shown in FIG. 3, the tongue 4 can be advanced and retracted by operating a user cylinder lock 5 disposed below the door lock 10, and one end of the tongue 4 is loosely fitted in the operation hole 4 a of the tongue 4. By rotating the operating lever 12 to the unlocking rotation position shown in FIG. On the other hand, as shown in FIG. 3 (b), when the user operates the cylinder lock 5 to rotate the operation lever 12 to the lock rotation position, the tongue 4 projects toward the door 1 and the lock coupling body described later. Intrudes into 13. In the intruded state, the tongue 4 is locked to a strike 14 described later, and the opening operation to the door 1 is prohibited.
[0020]
Therefore, in this embodiment, after inserting a predetermined amount of coins from the coin insertion slot 10a, the door 1 is closed, and then a user's cylinder lock is set using an unlock key (not shown) mounted in advance. After operating the tongue 4 to the protruding position by operating the lock 5, the unlocking key is removed to shift to the locked state, so that the door opening operation by anyone other than the user becomes impossible.
[0021]
The door lock 10 is provided with an administrator cylinder lock 6. The administrator cylinder lock 6 is provided to allow the administrator to open the door when the user does not perform the unlocking operation for a long time in the locked state, for example. As shown in (1), the tongue 4 can be forcibly moved to the unlocking position by rotating the operation lever 12 'connected to the administrator cylinder lock 6 to the unlocking rotation position. Regardless of whether the administrator's cylinder lock 6 or the user's cylinder lock 5 is operated, the other operation levers 12 and 12 'can follow the other cylinder locks and the operation levers 12 and 12'. Is set to an appropriate play angle.
[0022]
Further, a cylinder lock holder 9 for attaching and detaching the above-described user cylinder lock 5 is connected to the administrator cylinder lock 6. As shown in FIG. 4, the cylinder lock holder 9 has a cylinder insertion hole 15 formed at one end where a shaft insertion portion 15a and a flange insertion portion 15b are continuously formed. Accordingly, it is driven in the vertical direction. The shaft insertion portion 15a has such a size that the shaft portion 5a of the user cylinder lock 5 can be inserted, and the stopper flange 5b having a larger diameter than the shaft portion 5a formed at the end of the shaft portion 5a cannot be inserted. As shown in FIG. 4A, when the tongue 4 is driven to the unlocking position, it corresponds to the shaft of the user cylinder lock 5.
[0023]
On the other hand, the flange insertion portion 15b is formed in such a size that the stopper flange 5b can be inserted, and as shown in FIG. 4B, when the tongue 4 is driven to the locking position, It corresponds to the shaft portion 5a.
[0024]
Therefore, in this embodiment, after operating the administrator's cylinder lock 6 to drive the tongue 4 to the unlocking position and opening the door 1 again, the administrator's cylinder lock 6 locks the tongue 4 again. 4B, the user's cylinder lock 5 can be pulled out from the cylinder lock holder 9 to the near side in FIG. 4B, and the user's cylinder lock 5 can be replaced.
[0025]
This restriction release of the user cylinder lock 5 is possible only when the administrator cylinder lock 6 is rotated to the rotation stroke end position, as shown in FIGS. 3 (b) and 4 (b). At this time, the protruding amount (L6) of the tongue 4 toward the door 1 is set to be larger than the protruding amount (L5) when the user's cylinder lock 5 is operated.
[0026]
On the other hand, a lock connector 13 is fixed to the back of the door 1 as shown in FIG. The lock connecting body 13 has a strike plate 16, a locking hook 2 rotatably connected to the strike plate 16, and a cover 17. The front plate 16a formed by bending the strike plate 16 has a front plate 16a. A rectangular hole 16b through which the tongue 4 can be inserted is opened and used as a strike 14. As shown in FIG. 2A, the rectangular hole 16b is longer than the height dimension (H4) of the tongue 4 so that the tongue 4 can be received even when the door 1 is vertically displaced during operation. Is formed with the height dimension (H16). A check plate 18 is mounted on the inner wall surface of the cover 17 so as to be able to move forward and backward by being urged toward the frame 11.
[0027]
The locking hooks 2 are formed on both side walls of a metal plate material bent in a U-shaped cross section, and are pivotally supported by hinge pieces 16 c cut and raised by the strike plate 16. The locking hook 2 is formed with a cam hole 2a through which a check pin 18a protruding from the check plate 18 is inserted. When the check plate 18 is sunk into the cover 17 from the front plate 16a, FIG. 2B, the check plate 18 protrudes from the front plate of the strike plate 16 in the normal position direction in which the tongue 4 is allowed to advance and retreat away from the back surface of the door 1 as shown by a chain line in FIG. As shown by a solid line in FIG.
[0028]
Therefore, in this embodiment, when the door is closed, the check plate 18 is pushed into the side wall of the frame 11 and is in a immersed state, and the locking hook 2 is held at the normal rotation position. In this state, the tongue 4 is in the rectangular hole 16b. Can invade from. On the other hand, when the door 1 and the frame 11 are opened due to the improper opening operation force applied to the door 1, the check plate 18 is projected as shown by a chain line in FIG. The stop hook 2 rotates to the engagement rotation position and engages with the engagement portion 3 of the tongue 4, and thereafter, the door 1 and the frame 11 are connected to prevent the door 1 from moving in the separating direction. .
[0029]
In order to confirm that the tongue 4 is at a position where the tongue 4 can be engaged with the locking hook 2 when the door 1 is illicitly operated, a detection passage 7 is formed inside the lock connector 13. The detection passage 7 is formed by further narrowing the approach path of the tongue 4 substantially restricted by the rectangular hole 16b in the vertical direction by the block wall surface 7a. As shown in FIG. 3B, the position of the block wall surface 7a in the depth direction, to be precise, the protruding direction of the tongue 4 is the stroke end position on the locking position side of the tongue 4 operated by the user cylinder lock 5. The vertical position corresponds to the vertical limit position of the tongue 4 at which the locking hook 2 can be engaged with the engaging portion 3.
[0030]
Therefore, in this embodiment, even if the relative displacement between the door 1 and the frame 11 is an amount that can be locked to the strike 14, the engagement between the locking hook 2 and the engaging portion 3 can be prevented. If this is not possible, the tip of the tongue 4 will not contact the block wall surface 7a and pass through the detection passage 7, so that the administrator cylinder lock 6 cannot be rotated to the lock-side rotation position. As a result, when the lock device is mounted or during maintenance, the user only operates the cylinder lock 6 for the administrator once and removes the cylinder lock 5 for the user. It is possible to easily check whether or not the locking is possible.
[0031]
【The invention's effect】
As is clear from the above description, according to the present invention, the engagement state between the locking hook and the engagement portion can be easily confirmed, and thus the security performance can be improved.
[Brief description of the drawings]
FIG. 1 is a front view showing the present invention.
FIGS. 2A and 2B are views showing a locked state of a locking hook, wherein FIG. 2A is a cross-sectional view taken along line 2A-2A of FIG. 2B, and FIG. 2B is a cross-sectional view taken along line 2B-2B of FIG.
3A and 3B are diagrams illustrating an operation of a user cylinder lock, wherein FIG. 3A illustrates an unlocked state, and FIG. 3B illustrates a locked state.
4A and 4B are diagrams illustrating an operation of an administrator cylinder lock, wherein FIG. 4A illustrates an unlocked state, and FIG. 4B illustrates a locked state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door 2 Locking hook 3 Engagement part 4 Tongue 5 Cylinder lock for user 6 Cylinder lock for administrator 7 Detection passage 8 Lock case 9 Cylinder lock holder

Claims (2)

A door lock device in which a tongue having an engagement portion with which a locking hook on a door side is engaged can be advanced and retracted by both a user cylinder lock and an administrator cylinder lock,
The protruding direction stroke of the tongue by the administrator cylinder lock is formed larger than that of the user cylinder lock, and the stroke extension portion has the engaging portion within a lockable range with the locking hook. A door lock device provided with a detection passage that allows passage of a tongue only at certain times. The administrator's cylinder lock is engaged with the user's cylinder lock to hold the user's cylinder lock in a lock case, and the user's cylinder lock near the end of the cylinder lock rotation stroke corresponding to the stroke extension. 2. The door lock device according to claim 1, wherein a cylinder lock holder is connected to release the engagement with the cylinder lock so that the user cylinder lock can be removed.

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