JP2002213120A - Rod-shaped key - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rod-shaped key which enhances the reliability of the key by making it harder to duplicate the key and can be used while making the direction of the key reversible. SOLUTION: The rod-shaped key 7 has a rod-shaped part 71, whose surface is formed with plural columns composed of plural longitudinally arranged recesses 77 capable of being engaged with a pin of a cylinder lock and which can be inserted into a keyhole of the cylinder lock. The rod-shaped part 71 is provided with a cylinder part 75, wherein the outer shape of a cross section perpendicular to the axis is made circular, and a guide protrusion 76 provided protrusively on the external surface of the cylinder part 75. The paired guide protrusions 76, formed at an interval at an angle of 180 degrees in a circumferential direction, can be engaged with a guide groove part formed in an inner cylinder of the cylinder lock. The recess 77 is formed so as to be the same as the recess located on an opposite side at the interval at the angle of 180 degrees in the circumferential direction, and the guide protrusion 76 is notched by at least a part of the recess 77.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar key used for unlocking or locking a cylinder lock.

[0002]

2. Description of the Related Art As shown in FIG. 13, in a conventional cylinder lock, an inner cylinder 102 is rotatably inserted inside an outer cylinder 101, and a cam C is fixed to a distal end portion of the inner cylinder 102.
A keyhole 121 is formed in the inner cylinder 102 along the center axis direction, and a plurality of pin holes 122 formed through the inner cylinder 102 and the outer cylinder 101 are opened in the keyhole 121. In the pin hole 122, the pin 103 and the driver 1
04 and a spring 105 are accommodated.

When the key 107 is not inserted into the keyhole 121, the driver 104 urged by the spring 105 is in a state of straddling the boundary between the outer cylinder 101 and the inner cylinder 102. At this time, the outer cylinder 101 and the inner cylinder 102
The mutually fixed state is maintained, and the unlocking, that is, the inner cylinder 102
Is prevented from rotating. On the other hand, when the key 107 is inserted into the keyhole 121, each pin 103 comes into contact with the key ridge recess 171 of the plate-like key 107 and is held at a predetermined raised position. Thereby, the boundary between the pin 103 and the driver 104 is matched with the boundary between the inner cylinder 102 and the outer cylinder 101,
The rotation of the inner cylinder 102 with respect to the outer cylinder 101 is allowed.

However, in the case of a cylinder lock using the plate-like key 107 as described above, the pins 103 are arranged in a straight line in the axial direction of the inner cylinder 102. For this reason, there is a disadvantage that the position of the pin 103 is adjusted by using a special tool, so that the pin 103 is easily unlocked (picked).

[0005] In order to solve this problem, there is known a cylinder lock in which a plurality of rows of pins 103 in which a plurality of pins 103 are arranged in a straight line in the axial direction of the inner cylinder 102 are formed in a circumferential direction. A rod key is used for this cylinder lock.

In a cylinder lock in which such pins are three-dimensionally arranged in both the axial direction and the circumferential direction, the number of pins can be increased, and the positions of the pins can be changed in the axial direction and the circumferential direction. Therefore, picking can be effectively prevented.

[0007]

However, even with a rod-shaped key used for a cylinder lock in which pins are three-dimensionally arranged, similar to a plate-shaped key as shown in FIG. The problem remains that the key can be duplicated relatively easily.

[0008] A rod key cannot be duplicated by simply shaving it to form a key mountain recess like a plate key, and requires a machine tool such as a drill to machine the concave hole. It is more difficult to duplicate the key. However, it is needless to say that the owner of the bar-shaped key preferably has greater difficulty in duplicating the key from the viewpoint of security.

A guide projection extending in the axial direction is provided on the outer surface of the rod key in order to align the angular position of the inner cylinder of the cylinder lock with the rod key in the circumferential direction. However, in the case of a bar-shaped key provided with such a guide projection, if the orientation of the guide projection when inserted into the keyhole is different from the orientation of the guide groove of the cylinder lock, the orientation of the guide projection of the bar-shaped key will be described. It is inconvenient because it is necessary to change the key and insert it again into the keyhole, or to always carefully check the direction of the guide convex part before inserting the rod-shaped key.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to improve the reliability of a key by increasing the difficulty of key duplication while securing picking resistance. It is an object of the present invention to provide a reversible rod key which can be unlocked or locked even if the angular position of the rod key in the circumferential direction is reversed.

[0011]

The object of the present invention is achieved by the following means.

(1) A plurality of pin holes are formed through an outer cylinder and an inner cylinder rotatably disposed inside the outer cylinder.
A rod-shaped rod used for unlocking or locking a cylinder lock that allows rotation of the inner cylinder with respect to the outer cylinder by matching the boundary between the pin and the driver accommodated in the plurality of pin holes with the boundary between the inner cylinder and the outer cylinder. A key, wherein a row of a plurality of recesses arranged in the longitudinal direction in which the pin can be engaged is formed on the surface in a plurality of rows, and has a rod-shaped portion that can be inserted into a keyhole of the cylinder lock, The rod-shaped portion includes a cylinder portion having a circular outer shape perpendicular to the axis, and a guide protrusion that is provided so as to protrude on an outer surface of the cylinder portion and extends parallel to a central axis of the cylinder portion, The guide protrusions are formed in a pair at intervals of 180 degrees in the circumferential direction, and are engageable with guide grooves formed in the inner cylinder of the cylinder lock, and the recesses are formed at intervals of 180 degrees in the circumferential direction. Recess on the opposite side Identical are formed by at least a portion of said recess, rod-shaped key, wherein the guide projection is cut out.

(2) The concave portion has a first row formed at a position 90 degrees in the circumferential direction from one of the guide convex portions, and a 180 ° circumferential direction from the first row. A second row formed at an opposing spaced apart position, at least a recess in which the pins of the first row are engaged and the pins of the second row are engaged The bar-shaped key according to the above (1), wherein a position of the recessed key in the longitudinal direction is shifted.

(3) The bar-shaped key as described in (2) above, wherein the recesses in the first and second rows are such that adjacent recesses partially overlap each other.

(4) The recesses in the first and second rows each have a bottom surface on which the tip of the pin of the cylinder lock can abut, and are mutually cut at the bottom surface of the adjacent recesses overlapping each other. The bar-shaped key according to (3), wherein the area of the missing portion is not more than half the area of the entire bottom surface when there is no overlap.

(5) The concave portion is formed on both the outer surface of the cylinder portion and the outer end surface of the guide convex portion, according to any one of the above (1) to (4). Bar-shaped key described in one.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described.

FIG. 1 is a sectional view taken along a line perpendicular to the axis as viewed from the front of the cylinder lock. FIG. 2 is a sectional view taken along the line II-II in FIG.

As shown, the cylinder lock has a substantially cylindrical outer cylinder 1 and an inner cylinder 2 rotatably disposed inside the outer cylinder 1. The inner cylinder 2 has a keyhole 21 formed along the center axis thereof.

The outer cylinder 1 and the inner cylinder 2 have an outer cylinder 1 and an inner cylinder 2 respectively.
, A plurality of pin holes are formed. The pin hole includes an outer cylinder side pin hole 11 formed in the outer cylinder 1 and an inner cylinder side pin hole 22 formed in the inner cylinder 2, and both have the same diameter. Further, a reduced diameter hole 23 having a smaller diameter than the pin hole 22 is formed from the bottom of the pin hole 22 on the inner cylinder side toward the key hole 21.

Then, with the pin holes 11, 22 and the reduced diameter hole 23 continuing, the pin 3, the driver 4 and the spring 5 are inserted from the outer surface side opening 12 of the pin hole 11 of the outer cylinder 1. The opening 12 is closed by the cover plate 6.

The pin 3 comprises a shaft 31 slidable in the diameter-reduced hole 23 and a head 32 provided outside the shaft 31 and capable of contacting the driver 4. Pin 3 is spring 5
Is normally urged inwardly together with the driver 4 by the resilience of the driver 4.
The inward movement is restricted by the contact of the head 32 with the head.

The pin holes 11 and 22 are arranged in a plurality of rows in a straight line in the axial direction, and the rows are formed in a plurality of rows. In the cylinder lock shown in FIGS. 1 and 2, the pin holes 11 and 22 form four rows of A, B, C and D. The pin holes of the rows A and D have their central axes set in the horizontal direction in the figure, and the pin holes of the rows B and C have the central axes forming an angle of 45 degrees with the horizontal direction in the figure. Is set to Each of the pin holes 11 and 22 accommodates a set of a pin 3, a driver 4, and a spring 5. For example, five sets are set in row A, six sets are set in row B,
Row 5 contains 5 sets and row D contains 6 sets. In FIG. 1, columns A to D, which do not originally appear on the same cross section, are drawn on the same cross section for ease of explanation.

FIG. 3 is an enlarged sectional view showing the vicinity of the pin in a state where the rod key is inserted into the keyhole of the cylinder lock, and FIG. 4 is an enlarged sectional view showing the state in which the rod key is rotated in FIG. It is.

When the bar-shaped key 7 is inserted into the cylinder lock shown in FIGS. 1 and 2, the bar-shaped key 7 comes into contact with the pin 3 and pushes it outward. At this time, as shown in FIG. 3, the tip of the pin 3 is fitted into a concave portion 77 formed at a predetermined depth from the outer surface of the bar-shaped key 7, and the boundary between the pin 3 and the driver 4 is It is designed to coincide with a division boundary 15 between the outer cylinder 2 and the outer cylinder 1. Therefore, rotation of the inner cylinder 2 with respect to the outer cylinder 1 is permitted, and as shown in FIG. 4, the inner cylinder 2 can be rotated to perform an unlocking or locking operation.

In the present embodiment, in particular, as shown in FIG. 1, the inner cylinder 2 is provided with guide grooves 25, 25 extending in parallel with the central axis of the inner cylinder 2 so that the inner peripheral surface of the keyhole 21 is formed. It is formed so as to be cut out in a concave shape. The guide grooves 25, 25
Are formed in pairs at intervals of 180 degrees in the circumferential direction, and can be engaged with a guide convex portion 76 of the bar-shaped key 7 described later.

FIG. 5 to FIG. 7 are views showing a stick key.
5 is a front view, FIG. 6 is a plan view, and FIG. 7 is a left side view.
FIG. 8 is an enlarged sectional view taken along line VIII-VIII in FIG.

As shown in the figure, a rod-shaped key 7 has a rod-shaped portion 71 which can be inserted into the keyhole 21 of the cylinder lock, a base 72 connected to the rear end of the rod-shaped portion 71, and a rear end of the base 72. It has a head portion 73 provided.

The rod-shaped part 71 is provided with a cylinder part 75 having a circular outer shape in a section perpendicular to the axis, and a projection protruding from the outer surface of the cylinder part 75 and extending parallel to the central axis of the cylinder part 75. 76. The cylinder part 75 is preferably solid, but may be hollow. The guide projection 76 is engageable with the guide groove 25 formed in the inner cylinder 2 of the cylinder lock. The guide convex portion 76 is preferably continuous in the axial direction as shown in the figure, but may be cut off and divided on the way.
The axial length may be short.

In the present embodiment, in particular, a pair of guide projections 76 of the rod-shaped portion 71 are formed at intervals of 180 degrees in the circumferential direction. The pair of guide projections 76 are preferably formed in the same shape and shape.

On the surface of the rod portion 71, a plurality of rows of a plurality of concave portions 77 arranged in the longitudinal direction with which the pin 3 can be engaged are formed in a plurality of rows. The positions of the recesses 77 on the surface of the rod-shaped portion 71 correspond to the positions of the pin holes 11 and 22 formed in the inner cylinder 2 of the cylinder lock. These recesses 77 are formed so as to be the same as the recesses located on the opposite side at intervals of 180 degrees in the circumferential direction.

A step 74 formed on the distal end side of the base 72
When the rod-shaped key 7 is inserted into the cylinder lock, the rod key 7 is brought into contact with the end face of the inner cylinder 2 and positioned. Thereby, the mutual axial position of the rod key 7 and the cylinder lock at the time of unlocking or locking can be made constant. Head part 73
Is a part for the user to hold the bar-shaped key 7.

FIG. 9 is a front view of a key material of a bar key, and FIG.
11 is a plan view of the same, FIG. 11 is a view for explaining the formation position of the recess, and FIG. 12 is a cross-sectional view showing the shape of the recess.

When manufacturing the bar-shaped key 7 having the concave portion 77, first, a key material as shown in FIGS. 9 and 10 is prepared. The rod portion 71 and the base portion 72 are integrally formed of a metal such as, for example,
Is formed of a resin such as ABS or PC, for example. This key material can be manufactured by, for example, insert molding.

As shown in FIG. 11, in the present embodiment,
The recess 77 is formed by four rows of a plurality of recesses 77 arranged in a straight line in the longitudinal direction of the rod-shaped portion 71. Here, columns A to D indicated by reference numerals in FIG.
A to D columns.

As shown in FIG. 12, the concave portion 77 is a substantially truncated conical hole in the present embodiment, and is processed by using a machine tool such as a drill. The vertex angle α of the virtual cone of the concave portion 77 is, for example, 90 degrees, and the depth d is a predetermined dimension determined for each key. This depth d is
It is selected from a plurality of preset types.

The positions of the five recessed portions 77 indicated by the white circles in the row A correspond to the positions of the pins 3 in the pin holes of the row A of the cylinder lock, and the white circles in the row D indicate the positions. The positions of the six concave portions 77 indicated by the symbols correspond to the positions of the pins 3 in the pin holes in the D row of the cylinder lock. On the other hand, the concave portions 77 indicated by black circles in the rows A and D
Is a concave portion located on the opposite side at an interval of 180 degrees in the circumferential direction, that is, a concave portion of the D line for the A line, and a concave portion of the A line for the D line are transferred in the same shape and size. It was formed as follows.

The recesses in which the pins in row A are engaged and the recesses in which the pins in row D are engaged are located on the opposite side at 180 ° intervals in the circumferential direction. Due to the misalignment, even if the recesses in the opposite row are transferred, the recesses do not overlap each other, and a very efficient rod-shaped key and cylinder lock can be designed and manufactured.

In the recesses in rows A and D, adjacent recesses may partially overlap each other. With this configuration, it is possible to achieve a compact configuration while sufficiently exhibiting the function as the concave portion. In this case, the recesses in the rows A and D each have a flat bottom surface on which the tip of the pin of the cylinder lock can abut, and the recesses of the mutually cut-out portions on the bottom surfaces of the overlapping recesses adjacent to each other. If the area is equal to or less than half the area of the entire bottom surface when there is no overlap, the function as the concave portion can be secured.

The positions of the six concave portions 77 indicated by white circles in the row B correspond to the positions of the pins 3 in the pin holes of the row B of the cylinder lock. The positions of the five recessed portions 77 shown by hollow circles correspond to the positions of the pins 3 in the pin holes of the C row of the cylinder lock. Further, a recess 77 identical to the recess 77 in the row B is transferred and formed at a position opposite to the recess 77 in the row B at an interval of 180 degrees in the circumferential direction. At the position on the opposite side at an interval of 180 degrees in the circumferential direction, the same concave portion 77 as the concave portion 77 in the C row is transferred and formed (see FIG. 5).

Here, since the concave portions 77 in the rows B and C are close to the guide convex portions 76, the guide convex portions 76 are cut off by at least a part of the concave portions 77 (see FIG. 5). ). In this case as well, the function as the concave portion 77 can be sufficiently ensured, but there are further advantages as follows. That is, when the concave portion 77 is machined by a machine tool such as a drill, one side surface of the tool is obliquely in contact with the guide convex portion 76, and therefore, in order to machine the concave portion 77 into an accurate shape, a highly rigid, highly accurate Machine tools are required. Therefore, it is difficult to duplicate the key at a key corner or the like, and the reliability of the key is improved.

As described above, according to the present embodiment, the bar-shaped key 7 has a plurality of rows of the plurality of recesses 77 arranged in the longitudinal direction in which the pins 3 of the cylinder lock can be engaged. It has a rod-shaped part 71 formed on the surface and insertable into the keyhole 21 of the cylinder lock. This rod-shaped part 71 has a cylinder part 75 having a circular outer shape in a section perpendicular to the axis, and a cylinder part 75.
And a pair of guide projections 76 extending in parallel with the central axis provided on the outer surface of the cylinder lock, and the guide projections 76 are formed in pairs at intervals of 180 degrees in the circumferential direction. The concave portion 77 is engageable with the guide groove portion 25 formed in the cylinder 2, and the concave portion 77 is formed to be the same as the concave portion located on the opposite side at an interval of 180 degrees in the circumferential direction. The guide projection 76 is notched.

Therefore, a rigid and high-precision machine tool is required when manufacturing the bar-shaped key 7, so that it is difficult to duplicate the bar-shaped key 7 at a key corner or the like. Can be improved. In addition, it is possible to provide a reversible rod key that can be unlocked or locked even if the angular position of the rod key 7 in the circumferential direction is reversed.

Further, since the guide convex portion 76 is provided so as to protrude on the outer surface of the cylinder portion 75 of the rod-shaped key 7, the concave portion 77 with which the pin 3 can be engaged is not limited to the side surface of the guide convex portion 76. It can also be formed on the outer end face,
The area for forming the concave portion 77 on the surface of the rod-shaped key 7 is enlarged. Therefore, in addition to being able to increase the number of key differences, it is possible to further improve the picking resistance due to the increase in the number of pins and the dispersion of the pin positions in the cylinder lock in which the pins are three-dimensionally arranged.

The present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the claims.

For example, the number of rows of pin holes A, B, C, D, etc. of the cylinder lock, the angular position of the rows, the number of sets incorporated in each row, the number of rows of recesses formed in the rod-shaped key,
The angular positions of the rows, the number of recesses in each row, and the like are merely examples, and can be changed as appropriate.

In the above embodiment, the recess 77 is
Although the case has been described in which the guide projection 76 is formed only on the outer surface of the cylinder portion 75 and is partially cut out by the recess 77, the present invention is not limited to this. Aggressive guide projection 7
6 can be formed on the outer end face.

[0048]

As described above, according to the present invention,
When manufacturing a bar-shaped key, a rigid and high-precision machine tool is required, making it difficult to duplicate at key corners, etc.
This is preferable in terms of security, and can improve the reliability of the key. Moreover, it is possible to provide a reversible rod-shaped key which can be unlocked or locked even if the angular position of the rod-shaped key in the circumferential direction is reversed. Further, since the bar-shaped key is provided with a guide protrusion protruding on the outer surface of the cylinder portion, a recess engageable with the pin can be formed not only on the side surface of the guide protrusion but also on the outer end surface. As a result, the area for forming the concave portion on the surface of the bar-shaped key is enlarged.
Therefore, in addition to being able to increase the number of key differences, it is possible to further improve the picking resistance due to the increase in the number of pins and the dispersion of pin positions in a cylinder lock in which pins are three-dimensionally arranged.

[Brief description of the drawings]

FIG. 1 is a sectional view in a direction perpendicular to an axis as viewed from the front of a cylinder lock.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged cross-sectional view showing the vicinity of a pin in a state where a rod key is inserted into a keyhole of a cylinder lock.

FIG. 4 is an enlarged cross-sectional view showing a state in which the rod key is rotated in FIG.

FIG. 5 is a front view of a rod key.

FIG. 6 is a plan view of the same.

FIG. 7 is a left side view of the same.

FIG. 8 is an enlarged sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a front view of the key material of the bar-shaped key.

FIG. 10 is a plan view of the same.

FIG. 11 is a diagram for explaining a formation position of a concave portion.

FIG. 12 is a sectional view showing a shape of a concave portion.

FIG. 13 is a sectional view showing a conventional cylinder lock and a plate-like key.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Outer cylinder, 11 ... Pin hole of outer cylinder side, 2 ... Inner cylinder, 21 ... Key hole, 22 ... Pin hole of inner cylinder side, 25 ... Guide groove part, 3 ... Pin, 4 ... Driver, 7 ... Rod key Reference numeral 71: rod-shaped portion, 75: cylinder portion, 76: guide projection, 77: concave portion.

Claims (5)

[Claims] A plurality of pin holes are drilled through an outer cylinder and an inner cylinder rotatably disposed inside the outer cylinder, and a boundary between a pin accommodated in the plurality of pin holes and a driver is formed inside. A rod-shaped key used for unlocking or locking a cylinder lock that allows rotation of the inner cylinder with respect to the outer cylinder by matching the boundary between the cylinder and the outer cylinder, and is arranged in a longitudinal direction in which the pins can be engaged. A row composed of a plurality of recesses is formed on the surface in a plurality of rows, and has a rod-like portion that can be inserted into a keyhole of the cylinder lock, wherein the rod-like portion has a circular outer shape in a cross section perpendicular to an axis. And a guide protruding portion provided on the outer surface of the cylinder portion and extending in parallel with the central axis of the cylinder portion, wherein the guide protruding portions are spaced 180 degrees apart in the circumferential direction. A pair is formed and formed on the inner cylinder of the cylinder lock. The concave portion is formed to be the same as the concave portion located on the opposite side at an interval of 180 degrees in the circumferential direction, and the guide convex portion is formed by at least a part of the concave portion. A bar-shaped key characterized by being cut out. 2. A first row formed at a position 90 degrees in the circumferential direction from one of the guide protrusions, and a 180 degree space in the circumferential direction from the first row. At least a second row formed at a position opposite to the first row, and a recess in which the pins of the first row are engaged and a recess in which the pins of the second row are engaged. 2. The bar-shaped key according to claim 1, wherein the position of the key is shifted in the longitudinal direction. 3. The bar-shaped key according to claim 2, wherein the recesses in the first and second rows partially overlap each other with adjacent recesses. 4. The recesses of the first and second rows each have a bottom surface to which a tip of a pin of the cylinder lock can abut, and a notch is formed in a bottom surface of the overlapping adjacent recesses. The bar-shaped key according to claim 3, wherein the area of the cut portion is equal to or less than half the area of the entire bottom surface when there is no overlap. 5. The device according to claim 1, wherein the concave portion is formed on both an outer surface of the cylinder portion and an outer end surface of the guide convex portion. Stick key.