JPH0240210Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to a lock structure for a door of a locker that houses, for example, electronic/communication devices.

(2) Technical background Electronic and communication devices often require safe storage and confidentiality protection of information contents. As a countermeasure against this problem, a system has been adopted in which the device is housed in a cabinet with a locking mechanism, that is, a locker, and only a specific administrator can open the locker. Although there are many types of locks, combination locks, which are commonly used in safes, are widely used because of their superior security, performance, and reliability. However, the conventional locking mechanism using a combination lock has problems as described below, and countermeasures are desired.

(3) Prior Art and Problems FIG. 1 is a perspective external view of a conventional example of a communication device housed in a locker. In the figure, reference numeral 1 indicates a locker, which consists of a main body 2 and a door 3 that can be opened and closed in a rotary manner as shown by arrow A.

Figures 2 to 9 show the locking mechanism of the door 3;
In particular, Figures 5 to 7 show the locked state, and Figure 8 shows the locked state.
9 and 9 show the unlocked state. The lock mechanism basically consists of a door closing mechanism that allows the door 3 to close (maintain the door in a closed state by some means) or open/close (simply open and close the door), and this door closing mechanism. and a combination lock that allows the release or locking of the First, the door closing mechanism is inserted into the door 3 from the outside in the directions of arrows B and B' (see Figure 1).
A handle 4 is provided so as to be operable, a rotary plate 5 is provided on the inside of the door 3 so as to rotate integrally with the handle 4, and a pair of upper and lower latching rods 6A are linked to the rotary plate 5. , 6B. As shown in FIGS. 5 to 7, when the handle 4 is turned in the direction of arrow B with the door 3 closed, the latching rods 6A and 6B move along the guides 7 fixed to the door 3 as indicated by the arrows. move upwards and downwards,
The leading end engages with metal fittings 8A and 8B fixed to the locker body 2, thereby holding the door 3 in a closed state. Further, as shown in FIGS. 8 and 9, when the handle 4 is turned in the direction of arrow B', the locking rods 6A and 6B move downward and upward as shown by the arrows, and the tips of the metal fittings 8A and 8B, and the door 3 becomes openable and closable.

Next, an example of a combination lock is shown in FIGS. 2 to 4. This combination lock 10 is provided near the handle 4, and includes a knob 11 and a scale plate 12 arranged on the outside of the door 3, and three discs 13 and 13-1 arranged on the inside of the door 3. ,13-2,13
- It is composed of parts such as 3. The knob 11, scale plate 12 and disc 13-1 are integrated,
Disks 13-2 and 13-3 can rotate freely. Each disk 13 has notches 14, 14-
1, 14-2, 14-3, are formed. When the scale plate 12 is turned to an unspecified position, the notch 1 on the disc 13
4 is not aligned with the predetermined position, and the combination lock 10 becomes locked. In this locked state, as shown in FIG. 5, the lock bar 15 linked to the rotary plate 5 of the door closing mechanism hits the periphery of the disc 13, preventing the handle 4 from being operated in the direction of arrow B'. In other words, the door closing mechanism is locked in the door closed state. On the other hand, pick 1
1 and turn the scale plate 12 from side to side by a specific number of times and number of graduations, all the notches 14 of the disk 13 are aligned to the predetermined positions, and the combination lock 10 becomes unlocked. In this unlocked state, the lock bar 15 can be fitted into the aligned notch 14 as shown in FIG. 8, and the handle 4 can be rotated in the direction of arrow B'. In other words, the door closing mechanism becomes operable. When the handle 4 is turned in the direction of the arrow B', the locking rods 6A, 6B are disengaged from the metal fittings 8A, 8B, as described above, and the door 3 can be opened. To close the opened door 3 and lock it again as shown in FIG. 5, first turn the handle 4 in the direction of arrow B to engage the locking rods 6A, 6B with the metal fittings 8A, 8B to close the door 3. Thereafter, the combination lock 10 can be turned to an unspecified position to lock it.

However, the lock mechanism described above has the following problems.

First, when the lock mechanism is released and the door 3 is opened as shown in FIG.
If the lock bar 15 is disengaged from the notch 14 of the combination lock 10 and the combination lock 10 is turned in the direction of arrow B', the lock mechanism will be in the locked state as shown in FIG.
In this case, in order to close the door 3, it is necessary to first unlock the combination lock 10 and then operate the handle 4 to return it to the unlocked state shown in FIG. 8, which is a cumbersome operation.

Second, although the above-mentioned operation for unlocking the combination lock is performed by the administrator, in this case, the secret of the unlocking dial may be exposed to other workers present at the site, which is undesirable from a management perspective.

(4) Purpose of the invention The purpose of the invention is to solve the above-mentioned problems with the locking mechanism of the conventional locker door, specifically, to prevent the locking mechanism from becoming locked when the door is open. The objective is to provide an improved structure that allows prevention.

(5) Structure of the device As described above, the present device generally includes a locker body having a metal fitting for closing the door, a door that can be opened and closed by having one side pivoted on the locker body, and A handle provided on the outside of the door that can be rotated and a handle provided on the inside of the door that moves forward and backward in conjunction with the rotational operation of the handle to engage or disengage from the metal fitting of the rocker body and close the door. Alternatively, a locking rod that enables opening and closing, a combination lock provided near the handle, a rotary disk with a notch that can be rotated in conjunction with the rotation of the combination lock on the inside of the door, a lock bar that is provided in conjunction with the handle on the inside and prevents rotation of the handle when in contact with the circumferential surface of the rotating disk, and enables rotation of the handle when inserted into a notch in the rotating disk; and a hook-shaped portion at the tip, which is tiltably supported by a bracket fixed to the inside of the lower part of the door, is arranged parallel to the above-mentioned latching rod, and has a small hole into which only the tapered tip of the latching rod can enter. A stop lever is always elastically biased in a position covering the tip of the locking rod, and a stop lever is provided on the locker body, and when the door is closed, the stop lever is tilted and the hook-shaped portion is tilted to a position that releases the tip of the locking rod. The cam is configured to include a retracting cam.

(6) Example of the invention Below, an example of the invention is shown in Figures 10 to 15.
This will be explained with reference to the figures. This embodiment is basically similar to the conventional example shown in FIGS. 1 to 9,
The only difference is the portion indicated by the symbol X in FIG. 5 or FIG. 8. Therefore, only these different parts are shown in FIGS. 10 to 15, and the same parts as those shown in FIGS. 1 to 9 are designated by the same reference numerals.

Now, as shown in FIGS. 10 to 14, according to the present invention, a bracket 21 is fixed to the inside of the lower part of the door 3, and a stop lever 22 is attached to this bracket.
is installed. As shown in Fig. 15, the stop lever 22 has a mounting part 23 on the upper part, and in this mounting part 23, the bracket 21 is attached to the support shaft P in the directions of arrows C (Fig. 10) and C' (Fig. 12). It is rotatably mounted. A tension spring 25 is applied between the upper end 24 of the stop lever 22 and the bracket 21, so that the stop lever 22 is always biased in the direction of arrow C. Then, as shown in FIGS. 10 and 11, the door 3
In the open state, the stop lever 22 is held in the first position as shown by the action of the spring 25. In this first position, the stopper portion 2 formed at the lower part of the stop lever 22
6 is inserted under the tip of the latch rod 6B in the state where the door can be opened and closed (see FIG. 8), and the downward movement of the latch rod 6B is prevented. That is, when the door is in the open state as described above, it is impossible for the handle 4 to turn, so the door closing mechanism is locked in the state where the door can be opened and closed, and the combination lock 10 is also locked in the unlocked state. be done.

On the other hand, a diagonal cam surface 27 is formed on the metal fitting 8B of the locker main body 2, and a cam follower 29 consisting of a roller is attached to a bracket 28 at the lower end of the stop lever 22 so as to face this cam surface. As shown in FIGS. 12 to 14, when the door 3 is closed, the cam follower 29 engages with the cam surface, and this action causes the stop lever 22 to rotate in the direction of arrow C' against the biasing force of the spring 25. and finally held at the second position 22'. In this second position, the stopper portion 26 is laterally removed from the lower position of the latching rod 6B, and the latching rod 6B can be moved downwardly. Therefore, as described above, the door closing mechanism can be operated by operating the handle 4, and the combination lock 10 can also be locked or unlocked.

The tip of the locking rod 6B is tapered (see FIG. 10 or FIG. 12), and a small hole 30 is formed in the stopper portion 26 of the stop lever 22.
(See Figure 15C) is open. This is the 10th
In the state shown in the figure and FIG. 11, the latching rod 6
When B is lowered, only the tapered tip of the locking rod engages with the hole 30, thereby preventing the stop lever 22 from being pushed by the locking rod 6B and rotating in the direction of arrow C'. This is what I did.

In addition, in the illustrated example, a roller is used as the cam follower 29 to obtain a smooth action.
Depending on the angle of the cam surface 27, etc., a simple sliding type may be used without using rollers.

Further, in the illustrated example, the mechanism such as the stop lever 22 is provided on the lower locking rod 6B, but the same effect can be obtained by providing it on the upper locker 6A instead.

(7) Effects of the invention As described above, according to the invention, when the door is closed, the locking mechanism can be operated freely as before, but when the door is open, the locking mechanism is reliably in the unlocked state. Retained. In particular, in the present invention, the entire lock structure, especially the stopper member, is completely housed inside the door and does not protrude outside from the periphery of the door, so it is difficult to accidentally touch the stopper member with the door open. There is virtually no risk of tilting it into a position that releases the latch rod tip. Therefore, many advantages such as simplified operation and improved reliability of maintenance management can be realized.

[Brief explanation of the drawing]

Fig. 1 is a perspective external view of a conventional example of a communication device housed in a locker, Figs. 2 to 9 are diagrams showing the lock structure of the locker door shown in Fig. 1, and Figs. A combination lock is shown, and FIGS. 5 to 7 show the locked state of the lock mechanism, FIGS. 8 and 9 show the unlocked state of the lock mechanism, and FIGS. 10 to 15 show the lock structure according to the present invention. Figures 10 and 11 show the main parts of the embodiment, with Figures 10 and 11 showing the door open, Figures 12 to 14 showing the door closed, and Figure 15 showing the door closed. show. 1...Rotsuka, 2...Rotsuka main body, 3...Rotsuka door, 4...Handle, 5...Rotary plate, 6A, 6
B...Latching rod, 7...Guide, 8A, 8B...
...Metal fittings, 10...Dial lock, 11...Knob, 1
2... Scale plate, 13... Disk, 14... Notch,
15... Lock bar, 21... Bracket, 22
...Stop lever, 25...Tension spring, 26...
...stopper part, 27...cam surface, 29...cam follower, 30...hole.

Claims (1)

[Scope of utility model registration request] A locker body having a metal fitting for keeping the door in a closed state, a door that can be opened and closed by having one side pivoted on the locker body, a rotatable handle provided on the outside of the door, and the inside of the door. a locking rod provided in the vicinity of the handle that moves forward and backward in conjunction with the rotational operation of the handle to engage or disengage from the metal fitting of the locker body to enable the door to be closed or opened; a rotary disc with a notch that can be rotated in conjunction with the rotation of the combination lock on the inside of the door; and a rotary disc with a notch that is provided on the inside of the door in conjunction with the handle and abuts the circumferential surface of the rotary disc. A lock bar prevents rotation of the handle when in contact with the door and enables rotation of the handle when inserted into the notch of the rotary disk, and a bracket fixed to the inside of the lower part of the door is supported for free tilting. and a stop lever disposed parallel to the locking rod and always elastically biased to a position where the tip hook-shaped portion having a small hole into which only the tapered tip of the locking rod can fit covers the tip of the locking rod. A locking structure for a door of a locker, characterized in that the locking structure includes a cam provided on the locker body, which tilts the stop lever and retracts the hook-shaped portion to a position where the tip of the locking rod is released when the door is closed.