JP2002295074A - Cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the number of kinds of key codes without increasing number of tumblers. SOLUTION: This cylinder block is formed by a holder 1 and a cylinder body 10, and the cylinder body 10 is provided with the tumbler 21 where a cutout part 23 formed in the side edge part by insertion of a key is aligned, and a side bar 28 engaged with an engagement groove of the holder 1 before the key is inserted and engaged with the cutout part 23 of the tumbler 21 by insertion of the key. Tumbler insertion holes 12 for inserting the respective tumblers 21 are formed in the cylinder main body 10, the side edge part where the cutout parts 23 for the tumblers 21 are not formed is provided with a spring bearing part 24 for a spring energizing the respective tumblers 21, thereby selectively storing the spring to energize the tumbler 21 in the inserting direction or in anti-inserting direction to the tumbler insert hole 12 of the cylinder main body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock used for a vehicle or a building door.

[0002]

2. Description of the Related Art Conventionally, a cylinder lock of this type comprises a holder mounted on a door body and a cylinder body rotatably provided in the holder. The cylinder body is provided with a plurality of tumblers urged in one direction orthogonal to a key insertion direction provided with key grooves on both side edges, and side bars urged toward each of the tumblers. There are provided a variety of devices which are difficult to unlock by picking.

Before the key is inserted, the side bar of the cylinder lock comes into contact with the side edge of the tumbler, protrudes from the cylinder body, and engages with a groove formed in the holder, thereby holding the cylinder body. Maintain unrotatable.
On the other hand, when the key is inserted, each tumbler is moved by the key mountain formed on the key, the notch formed on the edge is aligned, and the side bar is immersed in the notch,
The cylinder body can be rotated with respect to the holder.

[0004]

However, in the above-mentioned cylinder lock, it is necessary to provide a notch for immersing the side bar in each tumbler, so that there is a limit in forming tumblers of different shapes. As a result, the types of configurable key codes are limited by the number of tumblers, and the only way to increase the number of key codes is to increase the number of tumblers to be arranged. Then, there is a problem that the shape of the cylinder lock becomes large.

Therefore, an object of the present invention is to increase the types of key codes without increasing the number of tumblers.

[0006]

In order to solve the above problems, a cylinder lock according to the present invention is mounted on a door body and has a holder provided with an engagement groove on an inner peripheral surface thereof, and is rotatably provided in the holder. A plurality of tumblers, which are urged in the cylinder body in a direction perpendicular to the key insertion direction, and in which the cutouts formed in the side green portions are aligned by key insertion, and toward each of the tumblers. In a state where the key is urged and before the key is inserted, the key comes into contact with the side edge of the tumbler, protrudes from the cylinder body, and engages with the engaging groove of the holder. In a cylinder lock provided with a side bar that is immersed in the cylinder body by engaging with a portion, a tumbler insertion hole for inserting each of the tumblers is formed in the cylinder body. In addition, a spring receiving portion of a spring for urging each tumbler is provided on a side edge portion of the tumbler where the notch portion is not formed, and the spring is provided with respect to a tumbler insertion hole of the cylinder body. The tumbler is selectively housed so as to be urged in the insertion direction or the anti-insertion direction.

According to the cylinder lock, the tumbler can be selectively biased in two directions, and different key codes can be set in each biasing direction. Therefore, many types of key codes can be set without increasing the number of tumblers.

[0008] In the cylinder lock, at one end of a tumbler insertion hole in the cylinder main body, an enlarged hole portion for inserting the spring receiving portion of each of the tumblers is provided.
It is preferable that each of the tumblers is inserted into the tumbler insertion hole from the same direction. By doing so, the workability of assembling the tumbler can be improved.

Further, a spring lid is provided for closing the enlarged portion of the cylinder body, and a spring is provided between the spring lid and the spring receiving portion or between the spring receiving portion and the bottom of the enlarged portion. It is preferable that the spring receiving portion is inserted so that the spring receiving portion can be urged in the insertion direction or the counter insertion direction of the tumbler insertion hole. With this configuration, the tumbler and the spring can be easily accommodated.

Furthermore, it is preferable that each of the tumblers is provided with a mark portion indicating a biasing direction of the spring. This makes it possible to easily confirm the direction in which the tumbler is inserted, thereby preventing erroneous mounting. In particular, by forming this mark on the engagement protrusion that engages with the holder, even after the tumbler is installed in the cylinder body, if the engagement protrusion protruding from the cylinder body is confirmed, the assembly state can be confirmed. As a result, it is possible to reliably detect an incorrectly mounted one.

In each of the tumblers, it is preferable to provide a second notch near the notch.
With this configuration, it is possible to prevent reading of the regular notch portion with which the side bar is engaged.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a cylinder lock for a building according to an embodiment of the present invention. The cylinder lock generally includes a holder 1, a cylinder body 10 rotatably provided therein, and a cover 38 covering the holder 1.
It is composed of

The holder 1 is obtained by forming a metal material such as zinc or aluminum into a substantially cylindrical shape.
On the outer peripheral surface of the holder 1, two positioning ridges 2 and two escape grooves 3 are alternately formed at 90 ° intervals. A flange-like flange 4 projecting outward is formed on the front side of the holder 1, and a cylindrical portion 5 projecting in a cylindrical shape is provided at the center thereof. Further, a pair of first engagement grooves 6 (one is not shown in FIG. 1) is formed at symmetrical positions on the inner peripheral surface of the holder 1 along the axial direction. The first engagement groove 6 makes the cylinder body 10 unrotatable by engagement of an engagement projection 25 of the tumbler 21 described later. Further, a pair of second engaging grooves 7 for accommodating side bars 28 protruding from the cylinder body are formed on the inner peripheral surface of the holder 1 at positions shifted by 90 degrees from the first engaging grooves 6. I have. At the rear end opening of the holder 1, as shown in FIG. 2, an enlarged portion 8 is formed in a predetermined range from the rear end, and a pair of engagement concave portions 9 are formed continuously with the enlarged portion 8. I have.

As shown in FIGS. 1, 3 and 4, the cylinder body 10 has a cylindrical shape, and a plurality of tumblers 21, a spring 27 for urging each tumbler 21, and a side bar. 28 are accommodated respectively. Also, on the outer peripheral portion on the rear end side of the cylinder body 10,
A construction cam 32 is provided slidably along the axial direction.

Specifically, user keys 50A and 50B (FIG. 9A,
A key insertion hole 11 in which a protrusion 11a corresponding to the key groove 52 of (B) is formed on only one side is formed. On the outer peripheral surface of the cylinder body, a plurality of tumbler insertion holes 12 communicating with the key insertion holes 11 are provided at predetermined intervals in the axial direction from both sides, and tumblers 21 described later are provided in the tumbler insertion holes 12, respectively. Have been. The tumbler insertion hole 12 is formed with a spring receiving portion 24 of the tumbler 21 and an expanded portion 13 into which the spring 27 is inserted, at the lower end of one side. On the outer peripheral surface of the cylinder body 10, a spring lid disposing portion 14 is provided along the axial direction so as to linearly connect the respective enlarged portions 13. As shown in FIG. 5, the spring lid mounting portion 14
The through hole extends through the flange 10a on the rear side of the cylinder body 10 fitted to the inner edge of the enlarged portion 8 at the rear end, and has a substantially trapezoidal cross section over the front surface. The cylinder body 1
0 is provided with a positioning recess 15 on the front surface,
A locking step 16 is formed on the flange 10a. Further, as shown in FIG. 1, a substantially I-shaped opening 17 for disposing a side bar 28 is formed on the outer peripheral surface on the front side of the cylinder body 10, and both ends of the opening 17 are flat mounting portions 17a.
It has become.

The spring lid 18 provided on the spring lid mounting portion 14 has one side surface on the cylinder body 10.
And a trapezoidal cross section having the same curvature as that of the outer peripheral surface.
The insertion end of the spring lid 18 is provided with a positioning projection 19 which is inserted and locked in the positioning recess 15. The other end of the spring lid 18 is provided with a locking projection 20 for locking to the locking step 16.

The tumbler 21 has a plate-like shape, as shown in FIG.
As shown in FIGS. 4 and 6A and 6B, the construction key having a short overall length and the user key 5 having a long overall length are provided.
It comprises ten front tumblers 21a responsive to both 0A and 50B, and four rear tumblers 21b responsive only to the user keys 50A and 50B. The tumbler 21 has a rectangular key hole 22 at the center. One side edge of each tumbler 21 has a V into which a side bar 28 is immersed.
A U-shaped notch 23 is formed, and a spring receiving portion 24 for pressing one end of a spring 27 is provided on the other side edge portion. Further, each tumbler 21 constitutes an engagement projection 25 in which both ends in the longitudinal direction protrude into the first engagement groove 6 and are engaged. In the present embodiment, a notch is formed on one of the engagement protrusions 25 to indicate that it is on the near side in the biasing direction of the spring 27.

The side bar 28 is shown in FIGS.
As shown in FIGS. 8A and 8B and FIGS. 8A and 8B, the lower surface has a substantially triangular prism shape protruding in a triangular cross section, and spring receiving portions 29 are formed on both sides of the upper surface, respectively. The side bar 28 is urged so as to be immersed in the opening 17 of the cylinder body 10 by a pair of springs 31 disposed between the side bar 28 and a stopper 30 fixed by caulking to the mounting portion 17 a of the cylinder body 10. Have been. And
When the tumblers 21 are aligned by inserting the predetermined user keys 50A and 50B and the cutouts 23 are arranged in a line, the side bar 28 is engaged with the cutouts 23 and sunk into the holder 1.

The construction cam 32 is shown in FIG.
A donut shape is formed as shown in FIG.
a is formed. A spring 3 is provided between the flange 32a and the flange 10a of the cylinder body 10.
3 is provided to urge the construction cam 32 toward the front side (the right side in FIG. 2). Engagement protrusions 34 are respectively formed at positions opposing the outer peripheral edge of the construction cam 32, and a spring recess 35 on the rear side and a tumbler recess 36 on the front side are formed near the engagement protrusion 34 on the inner peripheral surface. Are respectively formed, and an engagement wall 37 for preventing the construction cam 32 from moving to the front side is provided therebetween. That is, the engagement wall 37
The construction cam 32 is prevented from moving to the front side by the rear tumbler 21b engaged with the tumbler recess 36 on the front side.

As shown in FIGS. 1 and 2, the cover 38 has one end formed in a substantially frustoconical cylindrical shape and covers the outer peripheral side of the holder 1, and the holder 1 is fixed by screws. Things. An insertion hole 39 for allowing a key to be inserted is formed in the central portion of the cover 38 on the conical surface side, and an annular light storage member 40 is arranged on the inner peripheral edge between the cover 38 and the front end surface of the holder 1. Is done. This light storage member 4
For 0, a material that kneads a luminous material into polycarbonate and emits light at night is used, for example.

Next, the assembly of the building cylinder lock having the above-described configuration will be described. First, FIGS. 3 and 7
As shown in (A) and (B), after inserting a spring 27 into the enlarged portion 13 of each tumbler insertion hole 12 formed in the cylinder body 10 and subsequently inserting a tumbler 21 into each tumbler insertion hole 12. , The spring lid 18
Is disposed to close the hole 13, thereby urging all the tumblers 21 in the direction opposite to the insertion direction.

Alternatively, as shown in FIGS. 4 and 8 (A) and (B), each tumbler insertion hole 12 has a tumbler 21.
Is inserted, and then the enlarged portion 13 of each tumbler insertion hole 12 is inserted.
After the spring 27 has been inserted into the opening, the spring lid 18 is disposed to close the hole 13 so that all the tumblers 21 are urged in the insertion direction.

Then, it is urged by a spring 27,
The tumbler 21 protruding from the cylinder body 10 is kept pressed into the cylinder body 10 using a jig (not shown) or the like.

The work of assembling the tumbler 21 and the spring 27 with respect to the cylinder body 10 can be performed with good workability by the widened portion 13 provided at one end of the tumbler insertion hole 12. Further, after the tumbler 21 and the spring 27 are assembled in the tumbler insertion hole 12, the assembled state can be maintained only by disposing the spring lid 18, so that the workability can be further improved.

Each tumbler 21 has a spring 2
7. All the mark portions 2 in the biasing direction or the counter-biasing direction by 7
6 are aligned. It should be noted that in the drawing, the assembly is performed so that the mark portion 26 is positioned in the direction of the urging by the spring 27.

Subsequently, the mounting portion 17a of the cylinder body 10
The side bar 28 is disposed together with the spring 31, and the stopper 30 is fixed by caulking from above. In this state, the side bar 28 is pressed against the side edge of the tumbler 21a on the front side.

Thereafter, the construction cam 32 is mounted on the outer peripheral portion of the cylinder body 10 together with the spring 33. At this time, the construction cam 32 is pushed in until it comes into contact with the flange 10a of the cylinder body 10 against the urging force of the spring. Then, the pressed state of the tumbler 21 at that position is released. As a result, the tumbler 21b is engaged with the tumbler recess 36 of the construction cam 32, and the engagement wall 37 prevents the construction cam 32 from moving in the axial direction.

Next, the cylinder body 10 is housed in the holder 1 together with the construction cam 32. At this time, the pressing of each tumbler 21 is released, and each tumbler 21 is engaged with each first engagement groove 6 in the holder 1. Further, the side bar 28 is pushed by the side edge of the tumbler 21 a on the front side and protrudes from the cylinder body 10, so that the second
It engages with the engagement groove 7.

Thereafter, the light storing member 4 is attached to the tip end surface of the holder 1.
In this state, the holder 1 to which the cylinder body 10 is mounted is mounted inside the cover 38 and fixed by screws.

The cylinder lock assembled in this manner is
Each tumbler 21 is urged against the tumbler insertion hole 12 of the cylinder body 10 in one direction of the insertion direction or the anti-insertion direction. Therefore, the user keys 50A and 50B for locking or unlocking the cylinder lock are shown in FIG.
As shown in (B), in the key plate 51,
A key groove 52 corresponding to the protrusion 11a of the key insertion hole 11 is formed only on one surface. In addition, this key plate 51
On one side edge, a key crest 53a is formed to move the tumbler 21 by contacting the edge of the key hole 22 of the tumbler 21, and a corresponding key crest is formed on the other side edge so as not to hinder the movement of the tumbler 21. 53b are formed.

When the tumbler 21 is assembled so as to urge the tumbler 21 in the anti-insertion direction with respect to the tumbler insertion hole 12 as shown in FIGS.
It can be locked or unlocked only with the user key 50A shown in FIG. On the other hand, as shown in FIGS. 8A and 8B, when the tumbler 21 is assembled so as to bias the tumbler 21 in the insertion direction with respect to the tumbler insertion hole 12, the user key 50B shown in FIG. Can be locked or unlocked only with.

As described above, in the cylinder lock of the present invention, by changing the biasing direction of the tumbler 21, different key codes can be set even if the same tumbler 21 is arranged in the same order. Therefore, many types of key codes can be set without increasing the number of tumblers 21.

Further, since each tumbler 21 is provided with a mark portion 26 indicating the biasing direction of the spring, the insertion direction can be easily confirmed when the tumbler 21 is inserted into the cylinder body 10. In particular, in the present embodiment, by forming the mark portion 26 on the engagement convex portion 25 that engages with the holder 1, even after the tumbler 21 is incorporated in the cylinder main body, the engagement convex portion 25 protruding from the cylinder main body can be formed. If it is confirmed, the assembled state can be confirmed, so that the erroneously mounted one can be surely found.

On the other hand, when the cylinder lock is mounted on a door 60 of a building, the rear end of the holder 1 is inserted into a hole 61a formed in a front panel 61 of the door 60 as shown in FIG. Position in the rotation direction.
Then, from the rear surface of the rear panel 62 of the door 60, the bar 63
The cover 38 is screwed through the mounting base 64 using
The mounting is completed by bringing the rear end opening into pressure contact with the front panel 61.

According to the cylinder lock mounted on the door 60 in this way, the portion covered by the cover 38 protrudes from the front surface of the door 60, so that the key can be easily inserted. If the user keys 50A and 50B having a long overall length are used, the unlocking and locking operations can be performed only by the user keys 50A and 50B as described below.

That is, the user keys 50A, 5 having a long overall length
With the insertion of 0B, not only the front tumbler 21a engaged with the engagement groove of the holder 1 but also the rear tumbler 21b engaged with the construction cam 32 moves. As a result, the construction cam 32 is slid to the front side by the urging force of the spring, and the engagement protrusion 34 engages with the engagement concave portion 9 of the holder 1 and cannot rotate.

Therefore, at this stage, even if the construction key is inserted, the rear tumbler 21b engaged with the construction cam 32 integrated with the holder 1 cannot be immersed in the cylinder body 10, and Lock operation becomes impossible.

On the other hand, the user keys 50A, 5
If 0B is used, the rear tumbler 21b is immersed in the cylinder body 10 together with the front tumbler 21a, and the user keys 50A and 50B are rotated to rotate the cylinder body 10 in the holder 1. It is possible to perform an unlocking or locking operation.

More specifically, in a state where unlocking by the construction key is disabled, and the user key 50
In the state before the insertion of A and 50B, as shown in FIG. 6 (A), the notch 23 formed in each tumbler 21 projects in one direction with a random projection amount in the insertion direction of the user keys 50A and 50B. ing.

Next, the unlockable user keys 50A, 5A
When 0B is inserted, the key mountain 53a becomes the tumbler 21.
Abuts on the edge of the key hole 22. Then, each tumbler 21 slides in the tumbler insertion hole 12 of the cylinder body 10 against the urging force of the spring 27, and the engagement projection 25 is moved from the first engagement groove 6 of the holder 1 to the cylinder body 10. Located within.

As a result, as shown in FIG. 6B, the notches 23 that were randomly located in the state before the user keys 50A and 50B were inserted are aligned in a line. as a result,
The side bar 28 is immersed in the cylinder main body 10 from within the second engagement groove 7 of the holder 1 by the urging force of the spring 31, and when the user rotates the user keys 50A and 50B, the cylinder main body 10 can be rotated.

The cylinder lock of the present invention is not limited to the configuration of the above embodiment. For example, as shown in FIG. 10, in each tumbler 21, a pseudo second similar to the
May be provided. This notch 23 ′
In order to prevent the side bar 28 from immersing, the side bar 28 is formed by a concave portion that is concave in the thickness direction.

Alternatively, as shown in FIG. 11A, the notch 23 'may be constituted by an elliptical hole, and as shown in FIG. It may be constituted by trapezoidal holes having the same shape. further,
As shown in FIG. 11 (C), a notch 23 ′ formed of a concave portion.
And a notch 23 'formed of a hole.

In this way, it is possible to prevent the legitimate notch 23 engaged with the side bar 28 from being read improperly.

In the above embodiment, the cylinder body 1
Although all tumblers 21 were urged in one direction of the insertion direction or the counter-insertion direction with respect to 0,
The configuration may be such that the biasing direction is changed every other time or the biasing direction is changed at random. This makes it possible to form more key codes.

[0046]

As is apparent from the above description, in the cylinder lock of the present invention, the tumbler can be selectively biased in two directions with respect to the cylinder body, and different key codes are set in each biasing direction. So we can do that,
Many types of key codes can be set without increasing the number of tumblers.

In addition, the tumbler is provided with a mark indicating the biasing direction of the spring, so that the assembled state of the tumbler can be checked. .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a cylinder lock according to the present invention.

FIG. 2 is a sectional view showing an assembled state of FIG. 1;

FIG. 3 is an exploded perspective view showing a first assembled state of the cylinder body.

FIG. 4 is an exploded perspective view showing a second assembled state of the cylinder body.

FIG. 5 is a rear view of the cylinder body.

6A is a cross-sectional view showing a state before the user key is inserted, and FIG. 6B is a cross-sectional view showing a state after the user key is inserted.

FIGS. 7A and 7B show a first assembled state, in which FIG. 7A is a sectional view showing a state before inserting a user key, and FIG. 7B is a sectional view showing a state after inserting a user key.

8A and 8B show a second assembled state, in which FIG. 8A is a cross-sectional view showing a state before a user key is inserted, and FIG. 8B is a cross-sectional view showing a state after a user key is inserted.

FIGS. 9A and 9B are perspective views showing a user key for locking or unlocking a cylinder lock.

FIG. 10 is a perspective view showing a modification of the tumbler.

FIGS. 11A, 11B and 11C are perspective views showing another modification of the tumbler.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Holder, 6 ... 1st engagement groove, 7 ... 2nd engagement groove, 10
... Cylinder body, 11 ... Key insertion hole, 12 ... Tumbler insertion hole, 13 ... Expansion part, 14 ... Spring lid disposition part, 18 ... Spring lid, 19 ... Positioning convex part, 2
0: locking projection, 21: tumbler, 22: key hole, 2
3, 23 '... notch, 24 ... spring receiving part, 25 ... engaging convex part, 26 ... mark part, 27 ... spring, 28 ... side bar, 29 ... spring receiving part, 32 ... construction cam, 38 ... cover, 50 ... User key, 60
…door.

Claims (5)

[Claims] 1. A holder mounted on a door body and having an engagement groove on an inner peripheral surface thereof, and a cylinder body rotatably provided in the holder, wherein the cylinder body is orthogonal to a key insertion direction. A plurality of tumblers in which the cutouts formed in the side green portions are aligned by the insertion of the key, and the side edges of the tumbler are urged toward each of the tumblers and before the key is inserted. Abutting against the portion and protruding from the cylinder body and engaging with the engagement groove of the holder,
In a cylinder lock provided with a side bar which is inserted into a notched portion of the tumbler by inserting a key to be immersed in the cylinder main body, a tumbler insertion hole for inserting each of the tumblers is formed in the cylinder main body. At the same time, a spring receiving portion of a spring for urging each tumbler is provided on a side edge portion of the tumbler where the notch portion is not formed, and the spring is provided with respect to a tumbler insertion hole of the cylinder body. A cylinder lock in which a tumbler is selectively housed so as to be urged in an insertion direction or a counter insertion direction. 2. The tumbler insertion hole of the cylinder body is provided at one end thereof with an enlarged portion for inserting the spring receiving portion of each of the tumblers, and each of the tumblers is inserted into the tumbler insertion hole from the same direction. The cylinder lock according to claim 1, wherein: 3. A spring lid for closing an enlarged portion of the cylinder body, and a spring is provided between the spring lid and the spring receiving portion or between the spring receiving portion and a bottom portion of the enlarged portion. 3. The cylinder lock according to claim 2, wherein the cylinder lock is inserted so that the spring receiving portion can be urged in an insertion direction or a counter insertion direction of the tumbler insertion hole. 4. The cylinder lock according to claim 1, wherein each of the tumblers is provided with a mark portion indicating a biasing direction of the spring. 5. The tumbler according to claim 1, wherein a second notch is provided near the notch.
The cylinder lock according to claim 4.