JPH0613326Y2 - Locking mechanism for lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a lock lid mechanism suitable for use in devices exposed to volcanic ash, sand dust, dust and the like.

(Prior Art) Locks mounted on equipment such as outdoors or in factories with a lot of dust have a major problem of malfunction and failure due to dust entering from the key hole of the rotor.

In order to solve this problem, a rotary lid plate is attached to the front surface of the rotor, and the key hole of the rotor is closed by the lid plate when not in use.

(Problems to be solved by the invention) In a conventional typical lid plate mechanism, an edge portion of the lid plate is pivotally attached to a front edge portion of the lock body by a shaft pin along an axial direction of the lock body, A cover plate is attached to the front of the lock body by a spring inserted between the pin and the lock body.

However, with such a simple structure, when the attracting spring is weakened, a gap is created between the cover plate and the front surface of the lock body, and sand and dust easily enter.

Also, since the lid plate is entirely exposed and anyone can easily rotate it by putting a finger on the lid plate, the lid plate is left open due to mischief of a child, etc. It may not work.

Further, since the lid plate is easily opened, a rotary cutting tool such as a drill can immediately abut against the front end of the key hole of the rotor. As a result, the locking mechanism between the rotor and the lock body is cut and broken by the cutting tool, and the lock is unlocked improperly. Therefore, it can be said that the conventional lid plate mechanism has no crime prevention property.

Therefore, an object of the present invention is to provide a lock idling lid mechanism excellent in both dustproofness and crime prevention.

(Means for Solving Problems) Hereinafter, referring to the reference numerals in the accompanying drawings, the lock idling lid mechanism of the present invention has a lock body 1 containing a rotor 2.
The tubular case 3 is fitted and attached to the front end of the, and the lid assembly 25 including the support disc 4 and the lid disc 5 is housed in the tubular case 3 so as to be idle, and the support disc 4 is guided in the radial direction. The claw plate 7 fitted in the groove 6 is slidably biased by a spring 9 so as to be engaged with the annular receiving groove 8 on the inner peripheral surface of the cylindrical case 3, and is housed in the circular recess 10 at the center of the rear surface of the lid disk 6. On the back side of the cam disk 11 that has been formed, the cam projection 1 that engages with the cam slope 12 at the base end of the claw plate 8
3 is provided on the front side of the cam disk 11 with an annular projection 15 that fits into the circular through hole 14 in the center of the front surface of the lid disk 5, and a minute passive concave portion 16 is provided on the inner peripheral surface of the annular projection 15. And a drive projection 18 that engages with the passive concave portion 16 is provided on the outer peripheral surface of the distal end portion of the cylindrical opening operation tool 17 fitted to the annular projection 15.

(Operation) In the lock using this idling lid mechanism, the drive projection 18 is
After engaging the opening operation tool 17 with the annular projection 15 of the cam disk 11 such that the cam disk 11 is rotated by the opening / closing operation tool 17, the opening operation tool 17 is engaged with the passive recessed part 16. Since the cam protrusion 13 pushes the cam slope 12, the claw plate 7 slides backward against the bias of the spring 9, and the tip of the claw plate 7 escapes from the annular receiving groove 8 of the tubular case 3.

Therefore, the support disk 4 and the lid disk 5 for the cylindrical case 3
The lock is released, and the lid assembly 25 is released as shown in FIG.
Is taken out from the cylindrical case 3. As a result, the regular key 2
0 is from the large-diameter opening 21 on the front of the cylindrical case 3 to the rotor 2
The lock mechanism 22 built into the lock body 1 is operated by the key 20 to unlock the rotor 2 from the lock body 1.

Then, by turning the key 20, the stopper plate 23 fixed to the rear end of the rotor 2 is rotated to the unlock position, and the door 24 is unlocked from the box body of the equipment. When the door 24 is closed and the rotor 2 is rotated in the reverse direction to the locked position and the key 20 is removed from the lock, the lid assembly 25 is inserted into the cylindrical case 3 so that the pawl 7 opens the opening of the cylindrical case 3. It hits the edge and retreats once. After that, when the lid assembly 25 is pushed to a position facing the annular receiving groove 8, the claw plate 7 advances due to the sliding bias of the spring 9 and re-engages with the annular receiving groove 8. As a result, the lid assembly 25 is locked in a position where the key hole 19 of the rotor 2 is closed so that the lid assembly 25 cannot be removed.

When the cutting edge of a rotary cutting tool such as a drill is pressed against the front surface of the cam disk 11 of the lid assembly 25 and rotated, the lid assembly 25 idles along the annular receiving groove 8, so that the cutting edge faces the rotor 2. Cannot move forward.

(Embodiment) In the illustrated embodiment, the cylindrical case 4 having a truncated cone shape has an inner flange portion 27 at the rear end portion, with which the front outer flange portion 26 of the lock body 1 is engaged. The support disk 4 of the lid assembly 25 is fitted into the cylindrical wall portion 28 on the back side of the lid disk 5, and is fixed to the lid disk 5 with screws 29. The claw plates 7 are provided in a pair on the left and right,
A receiving portion 30 for the biasing spring 9 composed of a compression coil spring is provided on the back side of each base end portion.

The other end of the chain member 31, one end of which is fixed to the side surface of the cylindrical case 3, is fixed to the front edge of the lid disk 5. The chain member 31 is used to easily pull out the lid assembly 25 from the cylindrical case 3 after the claw plate 7 is slid backward, and prevents the lid assembly 25 from being lost after removal. On the outer periphery of the front end of the lid disk 5, the flange portion 3 that comes into contact with the opening edge of the front end of the cylindrical case 3 is provided.
2 is formed to project.

As the lock mechanism 22 for locking the rotor 2 to the lock body 1, a disk tumbler type cylinder lock mechanism, a pin tumbler type cylinder lock mechanism, an axial pin tumbler type lock mechanism, a cam disc type lock mechanism, a sliding mechanism. A bar type locking mechanism or the like can be appropriately selected and used, and is not particularly limited.

(Effect of the Invention) As described above, in the lock idling lid mechanism of the present invention, the rotor 2
The cylindrical case 3 is fitted and attached to the front end portion of the lock main body 1 that accommodates the lock body 1, and the lid assembly 25 including the support disk 4 and the lid disk 5 is fitted to the cylindrical case 3, so that the key of the rotor 2 is locked. Intrusion of sand, dust, rainwater, etc. into the hole 19 is accurately prevented, and the lock can be reliably protected from sand, dust, etc.

Further, the lid assembly 25 is attached to the cylindrical case 3 in a non-removable manner by the pawl plate 7 fitted in the guide groove 6 of the support disk 4 engaging with the annular receiving groove 8 of the cylindrical case 3. In order to slide the claw plate 7 backward, it is necessary to rotate the cam disk 11 in a predetermined direction against the sliding bias of the spring 9 by a predetermined angle. As a clue for the rotation operation of 5, the front center through hole 14 of the lid disk 5 is used.
Since there is only the annular projection 15 exposed to the outside and the minute passive concave portion 16 formed on the inner peripheral surface thereof, the cam disk can be obtained without using the prepared opening operation tool 17 with the driving projection 18. It is almost impossible to rotate 11.

Therefore, the lid assembly 25 is not easily taken out from the tubular case 3 by a child's mischief and the keyhole 19 of the rotor 2 is not left exposed, and it is always effective as a perfect dustproof and waterproofing means. Can function.

Further, since the lid assembly 25 can be idled in the cylindrical case 3 by the claw plate 7 sliding along the annular receiving groove 8, a rotary cutting tool such as a drill is used for the lid assembly 25.
Even if it is abutted against the cam disk 11 or the like and rotated, the rotational force is consumed for idling of the lid assembly 25, and the blade edge cannot advance toward the rotor 2. Therefore, the rotor 2 and the built-in locking mechanism 22 cannot be cut and broken.

That is, the lock idling lid mechanism of the present invention has sufficient dustproofness and crime prevention, and its practical value is great.

[Brief description of drawings]

The drawings show a lock using an idling lid mechanism according to an embodiment of the present invention. FIG. 1 is an exploded perspective view of a main part of the lock, FIG. 2 is a front view of the lock, and FIG. 3 is a front view of the lock. FIG. Fourth
The figure is a vertical sectional view of the lock with the lid assembly removed. 1 ... Lock body, 2 ... Rotor, 3 ... Cylindrical case, 4 ...
... Support disk, 5 ... Lid disk, 7 ... Claw plate, 8 ... Annular receiving groove, 9 ... Spring, 11 ... Cam disk, 12 ... Cam slope, 13 ... Cam projection, 14 ... Transparent Hole, 15 ... annular projection, 16 ... passive recess, 17 ... opening operation tool, 18
...... Drive protrusion, 19 ...... key hole, 20 ...... key

Claims (1)

[Scope of utility model registration request] 1. A cylindrical case 3 is fitted and attached to the front end of a lock body 1 accommodating a rotor 2, and a lid assembly 25 composed of a support disk 4 and a lid disk 5 can be idled in the cylindrical case 3. And the claw plate 7 fitted in the radial guide groove 6 of the support disk 4 is slidably biased by the spring 9 so as to be engaged with the annular receiving groove 8 on the inner peripheral surface of the cylindrical case 3, On the back side of the cam disk 11 housed in the circular recess 10 in the center of the back surface of the lid disk 6, a cam projection 13 that engages with the cam slope 12 at the base end of the claw plate 8 is provided.
An annular projection 15 that fits into a circular through hole 14 in the front center of the lid disk 5 is provided on the front side of the cam disk 11, and a minute passive recess 16 is provided on the inner peripheral surface of the annular projection 15. A drive projection 18 that engages with the passive concave portion 16 is formed on the outer peripheral surface of the distal end portion of the cylindrical opening operation tool 17 fitted to the annular projection 15.
Locking lid mechanism for locks.