JPH0335820Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a locking mechanism for a bolt on a door of a safe, a library, etc.

[Conventional technology]

Normally, the bolts installed on the door of a safe, etc., appear on the left and right sides of the door, and regulate the opening and closing of the door by engaging with the bar holders formed in the door frame. The protruding and retracting operation is performed by converting the rotation of a handle provided on the front side of the door into the protruding and retracting stroke movement of the bolt via a link mechanism.

The rotation of the handle is regulated by engaging a locking rod with a link rod of a link mechanism connected to the bolt, and the operation of the locking rod is controlled by one or more locking rods. It has come to be regulated by locking and unlocking combination locks.

FIG. 2 shows an example of a locking mechanism in which bolts protrude and retract from the left and right sides of the door.

[The problem that the idea attempts to solve]

In the conventional mechanism shown in Fig. 2, an operating lever 2 attached to a handle shaft 1 and swung left and right by the rotation of the shaft 1 has a link mechanism that allows the bolt to move in and out from the left side of the door in the figure. A movable plate 3 is supported and connected so as to be able to move only left and right.

The movable plate 3 is connected to the movable plate 3 via a vertical connecting member 4 directly connected to the movable plate 3.
A locking plate 5 parallel to the movable plate 3 is disposed above the moving plate 3 and is integrally provided, while a locking notch 51 recessed downward on the lower side of the locking plate has three combination locks. A vertically movable chain such as a blocking member 8 which is connected to each retractable latch 6a of 6 through a connecting member 7 and which engages the notch 51 at its upper end only when each lock 6 is unlocked. A locking lever is associated.

In the mechanism shown in FIG. 2, the three locks 6 are arranged above the handle shaft 1 because of the space required to prevent interference between the various members inside the door. In addition, the height of the operating position of each lock 6 and handle (not shown) located on the front side of the door is limited to a certain range.

In FIG. 2, 5a, 7a, and 8a are guide members that support and guide the operation of each member 5, 7, and 8. Further, although not shown, a bar is attached to the movable plate 3 laterally via a connecting member.

In the state shown in the second figure above, each lock 6 is in a locked state, and therefore, the blocking member 8 is in the upper position and engaged with the locking notch 51, so the locking plate 5 cannot be moved left or right. In other words, the movable plate 3, which is integrated with the locking plate 5 through the connecting member 4, is in a state where its rightward movement is restricted, so the handle shaft 1 via the operating lever 2 cannot rotate. Therefore, the bolt attached to the moving plate 3 cannot change its state. In other words, the bolt is restricted to the left side of the door.

However, in the conventional mechanism shown in FIG. 2, the sliding (left and right movement) loads of the movable plate 3, connecting member 4, locking rod, and bolt (not shown) are applied by the rotational force of the handle applied to the handle shaft 1. Because of the support, there is a drawback that the handle is difficult to operate.

[Means to solve the problem]

The present invention has been made with the aim of providing a locking mechanism that solves the problems of the conventional products described above, and its configuration includes a bolt 34 and a lower shielding plate 35 via connecting links 31 to 33. , a movable plate 3 that is moved left and right by the rotation of the handle shaft 1 to cause the bolt etc. to appear and retract from the end face of the door, and a connecting member 7 to a locking rod that moves up and down to regulate the operation of the movable plate 3.
In a locking mechanism for a safe door, etc., which consists of a lock 6 connected with a latch 6a that appears and retracts in the vertical direction through a
A locking rod 8 connected to the retractable latch 6a of the lock 6
1 is provided between the latch 6a and the locking rod 81 so as to be able to move up and down via a direction changing link 9 whose intermediate portion is pivotally connected to the door side, and the locking rod is provided on the upper side of the movable plate 3. 81 is characterized in that an engaging portion 36 is formed for engaging the lower end side of the member 81.

[Effect]

The present invention has a structure in which the vertical movement of the latch 6a of the combination lock 6 is converted into the vertical movement of the locking rod 81 via the direction conversion link 9, and the lower end of this locking rod 81 engages with the movable plate 3 from above. Therefore, the load applied to the movable plate 3 is reduced, and the movable plate 3 can be easily moved left and right by the angular rotation of the handle shaft 1.

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIG.

1 is a handle shaft attached directly or indirectly to a handle (not shown) provided on the outside of the door in order to operate the bolt, and 2 is a swing type actuator attached to the shaft 1. Lever 3 is the lever 2
This is a horizontal movement type moving plate provided in connection with the lever 2, and is connected to the vertically long hole 2a of the lever 2 with a pin 3a erected therein.

The movable plate 3 is provided with horizontally elongated holes 3b on both sides thereof supported by pins 3c erected on the door side so as to be movable left and right. In addition, this actuating plate 3
In the illustrated embodiment, the connecting links 31 to 3
A bolt 34 that appears on the top and bottom of the door through 3
and a lower shielding plate 35 are connected.

Here, the bolt 3 that appears on the top (or bottom) of the door
4 regulates the opening and closing of the door by running, and the lower shielding plate 3
5 also plays the role of regulating the movement of the door, but it is usually installed on sliding doors that are often installed on floors without steps (entrances and exits) to prevent water and fire from flowing into the inside of the refrigerator. be.

In addition, 31a is a mounting pin of the connecting link 31;
b A connecting pin between the link 31 and the moving plate 3, 31c
is a long hole that guides this pin 31b, 31d, 3
Reference numeral 1e designates a pin and an elongated hole for connecting the connecting link 31 and the connecting link 33 of the lower shielding plate 35.

The mechanism of the present invention also includes three combination locks 6 and their latches 6a, a connecting member 7 that connects these latches 6a, a handle shaft 1, an operating lever 2, and a moving plate 3. Each member is provided with substantially the same configuration as the conventional mechanism shown in FIG. 2, but other configurations are different from the conventional mechanism described above.

That is, in FIG. 1, the upper link of the connecting member 7, which moves together with the vertical movement of each latch 6a, forms a substantially L-shape with the bent portion fixedly pivoted to the door side 9a. The right end of the conversion link 9 is pivotally attached 9b, while the upper end of a locking rod 81 arranged substantially perpendicularly above the moving plate 3 is pivotally attached 9c to the left end of the direction conversion link 9. Oh, and this locking rod 8
1, the lower end 82 of which is a cutout-shaped engagement portion 36 formed on the upper side of the moving plate 3 corresponding to the lower end 82.
It is arranged so that it can be engaged from above.

In the direction changing link 9 shown in FIG. 1, horizontally elongated holes are formed in the pivoting parts 9b and 9c of the connecting member 7 and the locking rod 81 to ensure mutual interlocking.
Further, 81a is a support member for the locking rod 81.

〔effect〕

When the locking mechanism is configured as in the present invention described above,
The vertical movement of each latch 6a when each lock 6 is locked or unlocked is converted into the vertical movement of the locking rod 81 via the direction conversion link 9 with the fixed pivot portion 9a as a fulcrum. The portion 82 is the engaging portion 3 of the moving plate 3
6 from above.

With this configuration, the weight of the connecting member 7, direction changing link 9, and locking rod 81 is not applied to the movable plate 3 at all, so even when the bolt 34 and the lower shielding plate 35 are installed on the top or bottom of the door. Angular rotation of the handle shaft 1 can be easily performed. Also, each tablet 6
Most of the dead weight of the connecting member 7 applied to the latch 6a side is offset by the dead weight of the locking rod 81 via the direction changing link 9, so that the load applied to the latch can be reduced and its durability can also be improved. .

The present invention is as described above, and is extremely useful as a locking mechanism for safe doors and the like.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of the implementation of the present invention, and FIG. 2 is a front view showing an example of a conventional product. 1... Handle shaft, 2... Operating lever, 3...
Moving plate, 6... lock, 6a... latch, 7... connecting member, 9... direction conversion link, 81... locking rod,
36... Engaging portion, 31, 32, 33... Connection link.

Claims (1)

[Scope of utility model registration request] Links 31 to 3 connect bolts 34 and lower shielding plate 35
3, and is provided with a movable plate 3 which is moved left and right by the rotation of the handle shaft 1 to cause the bolt etc. to appear and retract from the end face of the door, and a locking rod which moves up and down to regulate the operation of the movable plate 3. In a locking mechanism such as a safe door, which is composed of a lock 6 connected to a latch 6a that retracts and retracts in the vertical direction via a connecting member 7, etc., a locking rod 81 connected to the retractable latch 6a of the lock 6 is connected to the latch. 6a
and the locking rod 81 so as to be able to move up and down via a direction changing link 9 whose intermediate portion is pivotally connected to the door side, and the lower end side of the locking rod 81 is provided on the upper side of the moving plate 3. Engagement part 3 for engagement
A locking mechanism for a bolt of a safe door, etc., characterized by forming a 6.