JPH0426388B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a composite card lock in which a so-called pin tumbler is incorporated into a so-called mechanical card lock that uses a perforated card as a duplicate key.

[Conventional technology]

For example, in a hotel room where an unspecified number of people stay, a malicious guest may duplicate the key and lock the lock.
Although there is a desire to change the master key of a room at any time to prevent theft from breaking into the room at a later date, it is currently difficult to replace the cylinder with a mechanical cylinder lock because it takes time and effort.

In order to eliminate such inconveniences, electrical card system lock devices have been put into practical use that use magnetic cards or perforated cards as duplicate keys. It is extremely complicated and expensive, and its installation and electrical wiring work also requires a great deal of cost and effort.

Therefore, the present applicant previously proposed a new so-called mechanical locking device using a perforated card as a duplicate key in Japanese Patent Application No. 57-6805 (Japanese Unexamined Patent Publication No. 58-123980). The locking device has achieved its intended purpose.

[Purpose of the invention]

Therefore, the object of the present invention is to improve the card-based locking device previously proposed by the applicant in Japanese Patent Application No. 57-6805, and to provide a composite card lock with further enhanced functionality and security performance. It is on offer.

[Means for achieving the purpose of the invention]

In order to achieve the above object, the present invention provides an inner card slit for storing a lock card that opens toward the indoor side and has an engaging hole, and a key card that opens toward the indoor side and has an engaging hole. A lock box in which outer card slits into which the key card is inserted are arranged in a row on almost the same plane, and a plurality of tumbler slits fixed in this lock box and substantially perpendicular to the card slits are arranged in a row in the width direction of the key card. The fixed block is a plate-like body whose overall shape is approximately T-shaped, and the horizontal bar of the T-shape is stored in each tumbler slit so as to straddle the inner and outer card slits, and the card slit side of the horizontal bar is A pair of detection protrusions for detecting the engagement hole, which protrude symmetrically with respect to the T-shaped vertical bar at the end edge, are biased in the direction of being pressed against the card inserted into the card slit, and also detect the thickness of the card. a plurality of swinging tumblers guided to be movable and swingable in the direction of at least the thickness of the card; and a plurality of swinging tumblers arranged on the opposite side of the fixed block from the card slit and capable of sliding in the width direction of the key card. an escape slit that allows the tip of the vertical bar of each swinging tumbler to swing in the locked state; A movable block is formed perpendicularly to the slit, and the sliding surface of the fixed and movable block is penetrated in the thickness direction of the card on the outside of the swinging tumbler. and includes at least one set of a tumbler pin and a driver pin that are movably guided in the penetration direction and urged in a direction to be pressed against the key card, and a portion of the key card that the tip of the tumbler pin abuts. The length of the tumbler pin is set so that the joint surfaces of the tumbler pin and the driver pin match the sliding surfaces of the fixed and movable blocks depending on the presence or absence of the engagement hole in the block.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 indicates a lock box, and this lock box 1 is attached to a door (not shown) via an escutcheon 2, as shown in FIG. 2, for example.

For example, the upper part of the lock box 1 is opened to the indoor side,
There is an inner card slit 5 for storing a lock card 4 (see Fig. 1) with engagement holes 3, 3 opened at predetermined positions, and an inner card slit 5 that is opened on the outdoor side and has engagement holes 3, 3 similar to those of the lock card 4. An outer card slit 7 into which the opened key card 6 is inserted is arranged in succession on substantially the same horizontal plane. In the illustrated embodiment, these card slits 5, 7 are formed as gaps between the ceiling plate of the lock box 1 and a fixing block 8, which will be described later. And on the inner surface of the ceiling plate of the lock box,
A protruding strip 9 is provided integrally to partition the inner and outer card slits 5 and 7 and to abut against the insertion edges of the lock card 4 and the key card 6 to define the insertion depth of these cards. The structure of the lock card and key card inserted into the inner and outer card slits 5, 7 will be described later in connection with the swinging tumbler described later.

On the other hand, inside the lock box 1, a fixed block generally designated by reference numeral 8 is fixedly installed. This fixed block 8
is held via holder plates 12, 12 between a pin block 11 whose cross section is approximately L-shaped, for example, for guiding a tumbler pin to be described later, and inner plates of this pin block 11 and the lock box 1. It has a plurality of partition plates 13, 13 stacked parallel to each other at intervals and in the width direction of the key card 6 (direction of arrow a in FIG. 1). Partition plate 1
In order to maintain a gap between the partition plate 13 and other adjacent partition plates 13, for example, as shown in FIG. 13a are fitted into unnumbered rectangular holding holes arranged in a row in the holder plate 12. Also,
Each partition plate 13 is held perpendicular to the card slits 5 and 7.

With the above configuration, a flat tumbler slit 14 is formed between one partition plate 13 and another adjacent partition plate 13. In this way, the fixed block 8 has a plurality of (20 in the illustrated embodiment) tumbler slits 14, 1, which are perpendicular to the card slits 5, 7 and connected in the width direction of the key card 6.
4 are formed, and the upper end of each tumbler slit 14 communicates with the inner card slit 5 and the outer card slit 7.

In each of the tumbler slits 14, there is a swinging tumbler 15 which is a plate-like body whose overall shape is approximately T-shaped.
is stored and maintained.

As is clear from FIG. 2, each swing tumbler 15 has a vertically long guide hole 15a formed near the intersection of the T-shaped horizontal bar and vertical bar, and a fixed block 8 in the width direction of the key card. By engaging with the penetrating guide rod 16, it is possible to move at least the thickness of the lock card 4 or the key card 6 in the vertical direction in FIG. The lower end of the vertical bar that projects downward is guided so that it can swing.

In addition, the guide hole 1 of each swing tumbler 15
A large rectangular spring hole 15b, for example, is formed in the vertical bar portion below 5a, and passes through the fixing block 8 parallel to the upper opening edge of this spring hole 15b and below the guide rod 16. Each swinging tumbler 15 is urged in the direction toward the card slits 5 and 7 by the elasticity of the first tumbler spring 18, which is a compression coil spring and is elastically loaded between the spring rod 17 that is loosely fitted into the spring hole 15b. has been done.

Furthermore, the horizontal bar of the swinging tumbler 15 is connected to the inner card slit 5 and the outer card slit 7.
The length of the horizontal bar is set so as to straddle the card slit side, and a pair of detection protrusions 15c, 15c are protruded from the edge of the horizontal bar on the card slit side symmetrically with respect to the vertical bar. In the illustrated embodiment, the detection protrusion is formed into a chevron shape to facilitate insertion of the lock card 4 and key card 6 into the card slit.

Further, in the illustrated embodiment, two guide rods 16 and two spring rods 17 for guiding the swinging tumblers are provided symmetrically with respect to the protrusion 9, and the swinging tumblers 15, 15 adjacent to each other are provided symmetrically with respect to the protrusion 9.
are respectively engaged with different guide rods 16 and loosely fitted with different spring rods 17. Therefore, the pair of detection protrusions 15c, 15c of the swinging tumbler are arranged alternately and shifted. As a result, the first
As shown in the figure, four rows of detection protrusions 15c, 15c arranged at equal intervals along the width direction of the key card 6 are formed inside and outside in the insertion direction of the key card 6.

Therefore, in the composite card lock according to the present invention, when the lock card 4 and the key card 6 are inserted into the inner card slit 5 or the outer card slit 7 until they hit the protrusions 9, the parts that align with the detection projections 15c are engaged. Different keys are obtained depending on whether the matching hole 3 is opened or not. That is, the pair of detection protrusions 1 of each swinging tumbler 15
One of 5c and 15c detects the presence or absence of the engagement hole 3 in the lock card 4, and the other detects the presence or absence of the engagement hole in the key card 6.

As mentioned above, since the rows of swinging tumblers are in two rows along the insertion direction of the key card 6, correspondingly, the lock card 4 and the key card 6 also have engaging holes in the direction in which the key card 6 is inserted. The swing tumblers 15, 1 are arranged in two rows in the width direction of the key card 6, and each row is made up of swinging tumblers 15, 1 that are adjacent to each other in the width direction of the key card 6.
It is off by an interval of 5. For this reason, even if the engagement holes 3 are arranged in series on the lock card 4 or the key card 6, there is no risk that the engagement holes will connect, and since the number of locations where the engagement holes should be opened increases, it is difficult to use many different keys. I can do it. In the illustrated embodiment, the rows 15, 15 of the swinging tumblers indicated by solid lines in FIG. The rows of swinging tumblers indicated by 2 correspond to 3a and 3a, respectively.

On the other hand, between the fixed block 8 and the bottom surface of the lock box 1, a movable block 19, which is, for example, a flat block, is movable in the width direction of the key card 6, that is, in the direction of the paper in FIG. are guided by.

On the upper surface of the movable block 19 facing the fixed block 8, there is a relief that aligns with the tumbler slit 14 of the fixed block in the locked state and allows the swinging end, which is the tip of the vertical bar of the swinging tumbler 15, to swing. The same number of slits 19a, 19a as the tumbler slits 14, 14 are formed.

Further, on the upper surface of the movable block 19, there are through grooves 19b, 19b into which the swinging ends of the vertical bars of the swing tumbler 15 engage when they are in an upright state substantially perpendicular to the card slits 5, 7. It is formed to be perpendicular to 19a and 19a.

Furthermore, as shown in FIG. 2, an operating member 21 is integrally connected to, for example, the lower surface side of the movable block 19, and the outer end of this operating member 21 protrudes outside the lock box 1 and is connected to the outer surface of the door. It engages with a locking bolt operating member (not shown) that is operated by a knob or handle (not shown) provided in the locking bolt.

Further, inside the lock box 1 outside the swinging tumbler group, a plurality of pairs of tumbler pins 22 and driver pins 23 are arranged in a row along the width direction of the key card 6. The above tumbler pin 22
As shown in FIG. 2, each of the sets of driver pins 23 has a first pin hole 24 that passes through the pin block 11 perpendicularly to the card slit, and a first pin hole 24 that is bored from the upper surface side of the movable block 19. The second hole with a bottom is coaxial with the first pin hole 24.
It is slidably guided in the pin hole 25 and the second pin hole 2
Due to the elasticity of the second tumbler spring 26 as a compression coil spring loaded in the second tumbler spring 26, the second tumbler spring 26 is biased upward in FIG. .

On the other hand, in the composite card lock of the present invention, when the key card 6 is inserted into the outer card slit 7,
An engagement hole 3c is formed in the part of the key card that comes into contact with, for example, the conical upper end of the tumbler pin 22 (see Fig. 1).
Another key difference is obtained depending on whether the key is opened or not.

Therefore, the length of the corresponding tumbler pin 22 is changed into two types depending on the difference in keys determined by the number and arrangement of the engaging holes 3c, 3c of the key card 6 in FIG. 1. The tumbler pin 22 shown in FIG. 2 corresponds to the case where the engagement hole 3c is not open in the key card 6, and in this case,
When the key card 6 is inserted into the outer card slit 7, the substantial part of the key card 6 pushes down against the elasticity of the second tumbler spring 26, and the joint surface of the tumbler pin and driver pin 23 is pressed against the fixing block 8 and the driver pin 23. It aligns with the sliding surface of the movable block 19, that is, the shear line (see FIG. 3).
Note that the length of the tumbler pin 22 corresponding to the opening of the engagement hole 3c in the key card 6 is
When the tumbler pin 22 is not inserted, the joining surfaces of the tumbler pin and the driver pin are aligned with the shear line, but when the key card 6 is inserted, the upper end of the tumbler pin 22 is in the real part of the key card 6 where the engagement hole 3c is not open. When abutting, the lower end of the tumbler pin 22 in FIG. 2 straddles the shear line (not shown).

[Effect]

The composite card lock according to an embodiment of the present invention configured as described above is used by inserting a lock card 4 having the number and arrangement of the engaging holes 3a and 3b as shown in FIG. 1 into the inner card slit 5. do. Key card 6 corresponding to the lock card shown in the first diagram and serving as a duplicate key
As shown in FIG. 1, the number and arrangement of the engaging holes 3a, 3b corresponding to the swinging tumbler 15 are the same as those of the lock card 4, and the combination of the different lengths of the tumbler pins 22 Accordingly, the number and arrangement of the engagement holes 3c for the tumbler pin 22 are appropriately set.

In the locked state, that is, when the key card 6 is not inserted into the outer card slit 7, the elasticity of the first tumbler spring 18 causes the detection protrusion 15c facing the outer card slit 7 of the entire swinging tumbler to
15c is brought into contact with the inner surface of the ceiling plate of the lock box 1.

On the other hand, the inner card slit 5 of the swinging tumbler
At least one of the detection protrusion groups 15c, 15c facing the rocking tumbler 1 is in contact with a portion of the lock card 4 where the engagement hole 3 is not open.
The swinging end of the vertical bar 5 swings outward and engages in the relief slit 19a (not shown). Also, the second
As shown in the figure, at least one of the tumbler pins 22 or the driver pins 23 straddles the sliding surfaces of the fixed block 8 and the movable block 19, that is, the shear line.

Therefore, the movable block 19 is the same as the fixed block 8.
Since the operating member 21 cannot be moved in the width direction of the key card relative to the key card, and therefore the operating member 21 cannot be moved, the locked state is maintained.

The key card 6, which is a duplicate key, is inserted into the outer card slit 7.
When inserted into the lock and key cards 4 and 6, the portions of the lock and key cards 4 and 6 that the pair of detection protrusions 15c and 15c of each swing tumbler 15 come into contact with must have the engagement holes 3 open, or In both cases, the engagement hole is not open.

Therefore, as shown in FIG.
The swinging tumblers 15, 15 stand upright, and the swinging ends at the tips of their vertical bars are all in the through groove 19b. intervene.

Further, as is clear from FIG. 3 or as described above, the joint surfaces of all the tumbler pins 22, 22 with the driver pin 23 align with the shear line. Therefore, the movable block 19 can be moved relative to the fixed block 8, and can be unlocked.

When a key card 6 different from the duplicate key is inserted into the outer card slit 7, for example, as shown in FIG. The swinging end has an escape slit 1
The driver pin 23 that engages with the latter or is connected to the fixed and movable blocks 8, 1
9, the movable block 19 cannot slide relative to the fixed block 8 and therefore unlocking is not possible.

〔effect〕

As is clear from the above explanation, the invention is based on the invention because if the number or arrangement of engagement holes between the lock card and the key card are different even in one place, the lock cannot be unlocked. Can be converted into a lock. Therefore, by replacing the lock card regularly or every day, even if a malicious guest duplicates the key card at the hotel as described above,
Unauthorized entry using the duplicated key card becomes impossible, and the safety and crime prevention performance of the lock are dramatically increased.

In addition, since all the components are mechanical parts, unlike the electrical card system described above, there is no need for electrical equipment such as a power supply, card reader, or control unit, and there is no need for electrical wiring work. An inexpensive card lock system can be constructed. Of course, it can function independently even when used alone, so it can be used in general households.

Furthermore, since the rocking tumblers are plate-shaped, thin, and relatively small, they can be incorporated in large numbers into a lockbox, allowing for more different keys than conventional mechanical cylinder locks. for example,
If the number of oscillating tumblers is 20, then the oscillating tumblers alone will yield 2 ²⁰ key differences, or about 1 million, and if the number of tumbler pins is 10, then
You can get a total of about 1 billion key differences.

In addition, the above-mentioned patent application filed earlier by the applicant
Compared to the invention of No. 6805, a tumbler pin is added, so even if you accidentally forget to insert the lock card circle into the inner card slit, you can unlock it without a key card. can be prevented.

Also, during the unlocking operation, the pin holes that house the tumbler pin and driver pin shift and are no longer coaxial, so the tumbler pin inserted into at least one tumbler pin engagement hole that is open in the key card is , is constrained in the axial direction, so that the key card cannot be pulled out of the outer card slot during the unlocking operation. Therefore, it is possible to prevent various inconveniences caused by pulling out the key card during the unlocking operation, such as leaving the house with the lock bolt retracted to the side edge of the door. .

Furthermore, it goes without saying that the addition of additional tumbler pins increases the number of key errors. This key difference using the tumbler pin has various effects, such as being able to be used as a hotel code to distinguish one hotel from another.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the appearance of a composite card lock according to an embodiment of the present invention with some members cut away; FIG. 2 is a cross-sectional view of the composite card lock in a state where no lock or key card is inserted; The figure is a cross-sectional view similar to Figure 2 showing the state in which a key card serving as a duplicate key is inserted.
FIG. 4 is a sectional view similar to FIG. 2, showing a state in which a key card serving as a different key is inserted. 1... Lock box, 3... Engagement hole, 4... Lock card, 5...
Inner card slit, 6... Key card, 7... Outer card slit, 8... Fixed block, 9... Convex strip, 1
3... Partition plate, 14... Tumbler slit, 15...
Swing tumbler, 15a...Guide hole, 15c...Detection protrusion, 16...Guide rod, 19...Movable block, 1
9a... escape slit, 19b... through groove, 22... tumbler pin, 23... driver pin.

Claims (1)

[Scope of Claims] 1. An inner card slit that opens to the indoor side and has an engagement hole for storing the lock card, and an outer side that opens to the outdoor side and into which the key card is inserted and has an engagement hole. a lock box in which card slits are connected in substantially the same plane; a fixed block fixed in the lock box in which a plurality of tumbler slits, which are substantially perpendicular to the card slits, are connected in the width direction of the key card; The overall shape is approximately T-shaped, and the T
The horizontal bar of the letter is stored in each tumbler slit so as to straddle the inner and outer card slits,
A pair of detection protrusions for detecting engagement holes, which are protruded symmetrically with respect to the T-shaped vertical bar at the edge of the horizontal bar on the card slit side, are urged in a direction to be pressed by the card inserted into the card slit. a plurality of swinging tumblers guided to be movable and swingable in the card thickness direction by at least the thickness of the card; an escape slit that is slidably guided in the width direction of the card and allows the tip of the vertical bar of each swinging tumbler to swing in the locked state, and an upright state in which the vertical bar of the swinging tumbler is approximately perpendicular to the card slit. When the tumbler is in position, a movable block is formed so as to be perpendicular to the slit, and the sliding surface of the fixed and movable blocks is placed on the outside of the oscillating tumbler. It has at least one set of a tumbler pin and a driver pin that penetrate the card in the thickness direction, are movably guided in the penetration direction, and are biased in a direction to be pressed against the key card, and the tip of the tumbler pin The length of the tumbler pin is set so that the joint surface of the tumbler pin and the driver pin matches the sliding surface of the fixed and movable blocks depending on the presence or absence of an engagement hole in the part of the key card that comes into contact with the key card. Composite card lock. 2 By engaging the vertical guide hole opened in the vertical bar of the swinging tumbler with the guide rod that passes through the fixing block in the width direction of the key card, the horizontal bar of the swinging tumbler can be moved in the thickness direction of the card. The composite card lock according to claim 1, which is movably and swingably guided. 3. The composite card lock according to claim 1 or 2, wherein the detection protrusion of the swinging tumbler is formed into a chevron shape. 4. The composite card lock according to any one of claims 1 to 3, wherein the swing tumblers are arranged in two rows with their positions alternately shifted in the key card insertion direction.