JPH0253592B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening/closing device for a three-sided door that locks the door using a cylinder lock and a pair of upper and lower locking rods.

The conventional three-sided door opening/closing device uses a latch operated by a cylinder lock and upper and lower rods.
If you remove the duplicate key from an unlocked cylinder lock, you will not be able to turn the latch. Therefore, in daily door opening and closing operations that do not require locking with a cylinder lock, it is necessary to insert a duplicate key into the cylinder lock when closing the opened door and temporarily securing it with a latch. Since the duplicate key protrudes from the surface of the door, there is a risk of getting clothes caught on it, and the inserted duplicate key is often held carelessly to open and close the door.

There is a problem in that when a door is opened and closed with a duplicate key, the duplicate key is subjected to a large burden due to the weight of the door and is damaged, making it impossible to perform the original locking operation using the cylinder lock.

Therefore, even when the cylinder lock is unlocked and the duplicate key is removed, the latch of the present invention is rotated by an operator located on the handle of the door, and the latch and rod are used to temporarily lock or close the door. The above problem was completely solved by improving the opening/closing device so that it could be opened freely.

Embodiments of the present invention will be described below with reference to the attached drawings. A door 1 is attached to a main body 2 such as a steel locker so as to be openable and closable, and the door 1 is provided with a handle portion 3 and a cylinder lock 4. be. A pair of upper and lower rods 6 and 7, which can be latched to the upper and lower frames (not shown) of the main body 2, respectively, are connected to the latch 5 attached to the cylinder lock 4, thereby forming a so-called three-way door opening/closing device. are doing.

The cylinder lock 4 itself, which consists of an inner cylinder 4a and an outer cylinder 4b, is well known, and a circular stop plate 9 is fixed to the back side of the inner cylinder 4 using a set rivet 8, and a latch 5 is attached to the latch 5. It is rotatably attached to the back surface of the inner cylinder 4a via a holding arm 11 having a circular hole fixed to the annular portion 5a using a set screw 12, and the stop plate 9 also serves to prevent the latch 5 from coming off. .
A rotation regulating plate 13 having a circular hole is mounted between the stop plate 9 and the holding arm 11 so as to be rotatable concentrically with the holding arm 11, while a portion opposite to the annular portion 5a of the latch 5 is provided. The pair of upper and lower rods 6 and 7 described above are pivotally mounted 14 and 15, and the lower rod 7 is fitted with an operator 16 that protrudes into the handle portion 3 described above. In this case, if the illustrated installation positions of the handle portion 3 and the cylinder lock 4 are reversed, for example, the operator 16 can be attached to the upper rod 6. The latch 5 is an annular portion 5a
The coil springs 17 hooked to the rods are normally biased clockwise in the figure, and the rods 6,
7 is held in a raised/lowered position, and 18 is a latching portion for a coil spring provided on the inner surface of the door 1. Therefore, the rear part of the outer cylinder 4b of the cylinder lock 4 and the holding arm 1
Stoppers 21 and 22 are provided on the rotation regulating plate 13, respectively, and a pin-shaped engager 23 is provided on the rotation regulating plate 13, which can come into contact with an actuation piece 9a formed on the peripheral edge of the stop plate 9. On the other hand, both ends of the arc-shaped tip 11a of the holding arm 11 are provided with protruding locking portions 24a and 24b that can be selectively locked with the stopper 21 on the outer cylinder 4b side, and with a rotation regulating plate. 1
Both ends of the peripheral edge portion 13a separated from the engaging element 23 of No. 3 are respectively formed into locking portions 25a and 25b which can be locked with either one of the stoppers 21 and 22, respectively.

According to the above configuration, in the locked state shown in FIG. 2 and FIG. One rotation of the rotating stop plate 9 causes the rotation regulating plate 13 to rotate by a predetermined angle in the counterclockwise direction in the drawing, and as shown in FIG. 22, the other locking portion 25b comes into contact with the stopper 21 on the outer cylinder 4b side and stops.
In the state shown in Fig. 5B, the cylinder lock 4
The duplicate key can be removed from the rotation regulating plate 1.
3 is a stopper 2 in which the locking portion 25a is on the holding arm 11 side.
2, the holding arm 11 can rotate counterclockwise in the figure until one of the locking portions 24a locks with the stopper 21 on the outer cylinder 4b side. Therefore, in the state shown in Figure 5B,
When the operator 16 is slightly lifted upwards against the coil spring 17, the latch 5 fixing the holding arm 11 rotates counterclockwise in the figure as shown in Figure C, and at the same time both upper and lower rods 6, 7 are drawn toward each other, and the latch 5 and both rods 6 and 7 are removed from the main body 2 side, allowing the door 1 to be opened.

After this operation, when the operator 16 is released in the state shown in FIG. 5C, the latch 5 and both rods 6 and 7 are operated by the coil spring 17 to return to the position shown in FIG. 5B. However, once the lower rod 7 is raised, it is equipped with known means (not shown) for temporarily holding the rod 7 in the raised position, similar to the opening/closing device of this type of three-way closing door. Therefore, the latch 5 and both rods 6 and 7 cannot be returned to their latching positions relative to the main body 2.

However, when the door 1 is closed, the holding of the rod 7 is released, so that the latch 5 and both rods 6, 7 can be returned to the latched position by the coil spring 17 as shown in FIG. 5B. Insert the duplicate key into the cylinder lock 4 in the state shown in FIG. When the duplicate key is removed from the cylinder lock 4 in the state shown in FIG. In addition, the holding arm 11 is also rendered unrotatable by one of the locking portions 25a of the rotation regulating plate 13, and the latch 5 and both rods 6, 7 are locked to the main body 2 and at the same time complete three-way locking is achieved. Can be done. Furthermore, when the inner cylinder 4a is rotated once in the forward and reverse directions with the duplicate key, at each point in time, the locking portions 25a and 25b of the rotation regulating plate 13 are engaged with the stopper 21 on the outer cylinder 4b side and the stopper on the holding arm 11 side. 22
, and the inner cylinder 4a is in contact with the outer cylinder 4b.
Since the cylinder lock 4 is prevented from rotating more than one rotation, the duplicate key can be operated properly with respect to the cylinder lock 4.

The relative positions of the stoppers 21, 22, the engager 23, and each locking portion 24a, 24b, 25a, 25b are such that the inner cylinder 4a can rotate once and the latch 5
is set so that it can rotate by the distance between both locking portions 24a and 24b of the holding arm 11.

The present invention is as described above, and includes a rotation regulating plate that can be rotated by a predetermined angle by the inner cylinder of the cylinder lock, and the rotation regulating plate allows the inner cylinder to rotate in either the forward or reverse direction. It is restricted so that it cannot rotate more than one revolution, and unlike conventionally known opening/closing devices of this type, the latch is not configured to be able to rotate in direct conjunction with the inner cylinder of the cylinder lock. In the unlocked position where the regulation plate has been rotated by a predetermined angle, even if the duplicate key is removed, the latch operates on the rod side and can freely rotate from the latched position in the unlocking direction, which is extremely convenient for opening and closing the door. Moreover, it has the advantage of completely eliminating the possibility of inconvenience caused by a duplicate key being inserted into a cylinder lock, and has great practical value.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a rear view when the lock is locked, FIG. 3 is a rear view with the latch released, and FIG. 4 is a rear view when the lock is locked. The plan view and FIG. 5 are operation explanatory diagrams showing the sizes of some of the members changed. 6 is a rear view with the latch released, and FIG. 6 is a sectional view taken along the line A-A in FIG. 2. In the figure, 1 is the door, 4 is the cylinder lock, 4a is the inner cylinder, 4b is the outer cylinder, 5 is the latch, 5a is the annular part,
6 and 7 are rods, 9 is a stop plate, 9a is an actuating piece, 1
1 is a holding arm, 13 is a rotation regulating plate, 16 is an operator,
17 is a coil spring, 21 and 22 are stoppers, 2
3 is an engaging element, and 24a, 24b, 25a, and 25b are locking parts.

Claims (1)

[Claims] 1. A cylinder lock is provided on the door, and a latch placed under the action of a spring is installed between the rear surface of the inner cylinder of the cylinder lock and a stop plate fixed to the rear surface. In the opening/closing device for a three-sided door, which has a pair of upper and lower locking rods connected to each other,
An operator is attached to one of the pair of upper and lower locking rods, and a stopper is provided protruding from the back of the outer cylinder of the cylinder lock and the back of the latch, and a rotation regulating plate provided separately from the latch is attached. They are superimposed and rotatably attached to the inner cylinder back of the cylinder lock, and an engaging element is provided on the rotation regulating plate that can freely come into contact with the actuating piece formed on the stop plate, and the latch side is provided with the above-mentioned lock. A pair of locking portions are selectively lockable to the stopper on the outer cylinder side, and the rotation regulating plate is separately lockable to either one of the stoppers on the outer cylinder and the latch side. An opening/closing device for a three-sided door, characterized in that each locking portion is provided with a pair of locking portions. 2. Opening/closing of a three-way locking door according to claim 1, wherein the latch is rotatably attached to the rear surface of the inner cylinder of the cylinder lock via a holding arm fixed to the annular part of the latch. Device. 3. The opening/closing device for a three-way closing door according to claim 2, wherein the stopper and the locking portion on the latch side are provided on the holding arm.