JP2002038776A - Cylinder lock for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent picking. SOLUTION: There is provided a cylinder lock for a building, which includes a holder 1 and a cylinder main body 2. The holder 1 is mounted in a door main body and has first and second engaging grooves in its internal peripheral surface. The cylinder main body 2 is rotatably arranged in the holder 1, and provided with a plurality of tumblers 12 and a side bar 13. The tumblers 12 are energized in a direction orthogonal to an insertion direction of a key in the cylinder main body 2 to protrude from the same, and then engage with the first engaging groove of the holder 1. The side bar 13 is energized toward the tumblers 12, and before insertion of the key, the side bar 13 abuts on side edges of the tumblers and protrudes from the cylinder main body 2, followed by engaging with the second engaging groove 9 of the holder 1. Then, upon insertion of the key, the tumblers 12 are kept to sink into the cylinder main body 2, and the key engages with a notch 23, to thereby sink into the cylinder main body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as a building cylinder lock, a plurality of tumblers are projected into an engagement groove formed in a holder to disable rotation of a cylinder body, and a plurality of tumblers are inserted into a cylinder by inserting a key. There is one that can be unlocked or locked by being immersed in the body and rotatable inside the holder.

[0003]

However, in the conventional building cylinder lock, a tool or the like is inserted through a key hole while the cylinder body is urged to rotate, and the tumbler escapes one by one from the engagement groove. It is very difficult to reliably prevent so-called picking, which is likely to be unlocked without using a key, by holding the key in the set position.

Accordingly, an object of the present invention is to provide a building cylinder lock capable of effectively preventing picking.

[0005]

According to the present invention, as a means for solving the above problems, a building cylinder lock is mounted on a building door body and provided with a holder having an engaging groove on an inner peripheral surface. A cylinder body rotatably provided in the holder, the plurality of cylinder bodies being urged by the cylinder body in a direction perpendicular to the key insertion direction, and the notches formed in the side edges being aligned by the key insertion. And the tumbler is urged toward each of the tumblers, in a state before the key is inserted, abuts against the side edge of the tumbler, protrudes from the cylinder body, and engages with the engaging groove of the holder. And a side bar that is immersed in the cylinder body by engaging with the notches aligned by insertion.

According to this configuration, when the key is inserted into the cylinder body, each tumbler moves into the cylinder body and the notches are aligned, so that the side bars are engaged with the aligned notches and are inserted into the cylinder body. It sinks and falls off from the first engagement groove of the holder. Thus, when you rotate the key,
The cylinder body can be rotated in the holder, and the unlocking or locking operation can be performed. Therefore, when the cylinder body is rotationally urged, the sidebar itself cannot move, and even if a tool or the like is inserted from the key hole to align the notches, the sidebar does not engage with the notches, so that the tumbler is not engaged. It cannot be held and the notches cannot be aligned. Further, even if the notch is engaged with the side bar without rotating and urging the cylinder body, the side bar is returned by the urging force of another tumbler, and the notch cannot be engaged with the side bar. Therefore, picking becomes impossible and rotation of the cylinder body, that is, unlocking operation cannot be performed.

When the holder is provided so as to protrude from the door main body, and its periphery is covered with a cover or provided on a knob device protruding from the door main body, the structure is suitable for a building door and theft prevention is achieved. This is preferable in that it can have excellent properties.

Further, the present invention provides a means for solving the above-mentioned problems, in which a building cylinder lock is mounted on a building door body, and a first engagement groove and a second engagement groove are provided on an inner peripheral surface. And a cylinder body rotatably provided in the holder. The cylinder body is urged by the cylinder body in a direction orthogonal to the insertion of the key and protrudes from the cylinder body. While being engaged with the key, the key is urged toward the plurality of tumblers on the front side where the notches formed in the side edges are aligned with the notches formed in the side edges while being inserted into the cylinder body, and each tumbler on the front side is pressed. In a state before the tumbler is inserted, the tumbler is brought into contact with the side edge of the tumbler, protrudes from the cylinder body, engages with the second engaging groove of the holder, and is inserted into the cylinder body by inserting the key. so, A side bar that is immersed in the cylinder body by engaging with the cutouts arranged in a line, and is urged in a direction perpendicular to the key insertion direction to protrude from the cylinder body and engage with a tumbler on the rear side of the cylinder body. When the user key is inserted into the cylinder body and the tumbler on the rear side is immersed in the cylinder body, the rotation is prevented by engaging with the holder, The cylinder body is provided with a construction cam that is configured to rotate separately.After inserting a user key into the cylinder body and rotating the cylinder body, the user key is inserted and the rear tumbler is removed. The cylinder body can be rotated by being immersed in the cylinder body.

With this configuration, in the assembling stage, only the front tumbler can be operated and unlocked or locked by operating the front tumbler only by the short construction key that cannot move the rear tumbler. Then, after being attached to the door of the building, if the tumbler on the rear side is immersed in the cylinder body by the user key having a long overall length, the tumbler engages with the holder and is prevented from rotating. The tumbler on the side cannot be immersed in the cylinder main body, and the cylinder main body cannot rotate, so that it is impossible to unlock or lock with a construction key.

It is preferable to dispose a protective member on the front side of the side bar in that the operation of the side bar by means other than keys can be appropriately prevented.

The protective member may be formed of a hard metal material that cannot be machined with a drill or the like, for example, a material obtained by quenching a cold-rolled steel sheet.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show a building cylinder lock according to the present embodiment. This cylinder lock generally includes a holder 1, a cylinder body 2 rotatably provided inside the holder 1, and a cover 3 covering the holder 1.

The holder 1 is obtained by molding a synthetic resin material into a substantially cylindrical shape. On the outer peripheral surface of the holder 1, two positioning ridges 4 and two relief grooves 5 are alternately formed at 90 ° intervals. A flange 6 is formed on the front side of the holder 1, and a tubular portion 7 is protruded from the center of the flange 6. A pair of first engagement grooves 8 (one not shown in FIG. 1) is formed at symmetrical positions on the inner surface of the cylindrical portion 7 along the axial direction. Also, on the inner surface of the holder 1,
At a position 90 degrees away from the first engagement groove 8, a pair of second
An engagement groove 9 is formed. As shown in FIG. 2, the rear end opening of the holder 1
Are formed, and a pair of engagement recesses 11 are formed continuously with the expanded portion 10.

A plurality of tumblers 12 and side bars 13 are accommodated in the cylinder body 2. The tumbler 12 responds to both the construction key having a short length and the user key having a long length.
It is composed of ten front tumblers 12a and four rear tumblers 12b that respond only to user keys.

The cylinder body 2 has a columnar shape, and a rectangular key insertion portion 14 is formed at the axis thereof. A plurality of tumbler holes 15 communicating with the key insertion portion 14 are formed in the outer peripheral surface of the cylinder body 2 at predetermined intervals in the axial direction from both sides. As shown in FIG. 2, spring insertion holes 15a are formed at one end (lower end) of the tumbler hole 15 at every other position on the front side of the drawing. Although not shown, a spring insertion hole 15a is also formed at the other end (upper end) on the other side of the paper surface of FIG. On the outer peripheral surface on the front side of the cylinder body 2,
As shown in FIG. 4A, a substantially I-shaped opening 16 is formed, and both ends of the opening 16 are flat attachment portions 16a. A flange 2a is formed on the back side of the cylinder body 2,
The holder 1 is fitted to the inner edge of the rear end opening.

A construction cam 17 is slidably disposed along the axial direction on the outer peripheral portion on the rear end side of the cylinder body 2. The construction cam 17 is shown in FIG.
A flange 17a is formed on one end side of the donut as shown in FIG.
A spring 18 is disposed between the spring and the spring a to bias the construction cam 17 toward the front side (the right side in FIG. 2). Engaging projections 19 are respectively formed at positions opposing the outer peripheral edge of the construction cam 17, and spring recesses 20 and tumbler recesses 21 are formed on the inner peripheral surface near the engaging projections 19, respectively. Is provided with an engagement wall 21 for preventing the construction cam 17 from moving to the front side. That is,
The rear tumbler 12b engaged with the tumbler engaging recess 20 on the front side of the engaging wall 21 prevents the construction cam 17 from moving to the front side.

The tumbler 12 is plate-shaped, and has a rectangular key hole 22 in the center as shown in FIG. A V-shaped notch 23 is formed on one side edge of each tumbler 12, and a spring receiving portion 25 to which one end of a spring 24 presses is provided on the other side edge.

As shown in FIG. 4 (a), the side bar 13 has a substantially rectangular parallelepiped shape whose lower surface protrudes in a triangular cross section, and has spring receiving portions 26 formed on both sides of the upper surface. The side bar 13 is urged so as to be immersed in the opening 16 of the cylinder body 1 by a pair of springs 28 disposed between the side bar 13 and a stopper 27 fixed by caulking to the mounting portion 16 a of the holder 1. It has become. And
Key 358 (see FIG. 3 (b)).
When the notches 2 are aligned and the cutouts 23 are arranged in a line, the side bar 13 engages with these cutouts 23 and is immersed in the holder 1. In this embodiment, one tumbler 12a on the front side protruding from the cylinder body 2 is provided.
The side bar 13 is made to protrude from the cylinder body 1 only by the urging force of the spring that urges the spring. However, if the urging force of the springs that urges several tumblers 12a is used, the urging force of each spring is reduced. Can be weakened.

The cover 3 has a cylindrical shape with one end having a substantially truncated cone shape, and covers the outer peripheral side of the holder 1. An insertion hole 29 for allowing insertion of a key 35 is formed at the center of the conical surface of the cover 3, and an annular luminous member 30 and a hard metal material are formed on the inner peripheral edge between the insertion hole 29 and the tip end surface of the holder 1. And a protection member 31 composed of As the light storage member 30, for example, a material obtained by kneading a light storage material in polycarbonate can be used, and the light storage member emits light at night. As the protection member, for example, a material obtained by quenching a cold-rolled steel sheet can be used. The holder 1 is screwed to the inner surface on the conical surface side of the cover 3 via a screw hole 6 a formed in the flange 6. The light storage member 30 has low strength and is easily broken. For this reason, if the tumbler 12 is moved while the light storing member 30 is broken and the side bar 13 is pushed in from the front side, the side bar 13 can be engaged with the notch 23. However, the protection member 3
Since the insertion of a tool or the like can be prevented by 1, the anti-theft property is excellent. In particular, if a material obtained by quenching a cold-rolled steel sheet is used as the protection member 31, a hole cannot be formed by a drill or the like, and the anti-theft property is further improved.

The cylinder lock for a building having the above-described structure is assembled as follows and used by being attached to a door of a building.

First, the spring 24 is inserted from both sides of the cylinder body 2 through the spring insertion holes 15a, and the tumbler 12 is further inserted through the tumbler holes 15. Each tumbler 12 is kept pressed by a jig or the like (not shown).

Subsequently, the stopper 27 is fixed to the mounting portion 16a of the cylinder body 2 by caulking, and the side bar 13 is mounted on the cylinder body 2 together with the spring 18. In this state, the side bar 13 is pressed against the side edge of the tumbler 12a on the front side. Further, the construction cam 17 together with the spring 18 is provided on the outer peripheral portion of the cylinder body 2.
Attach. In this case, the construction cam 17 is pushed in against the urging force of the spring 18 until it comes into contact with the flange 2 a of the cylinder body 2. Then, the pressed state of the tumbler 12 at that position is released. As a result, the tumbler 12b is engaged with the tumbler recess 21 of the construction cam 17, and the engagement wall 21 prevents the construction cam 17 from moving in the axial direction.

Next, the cylinder body 2 is housed in the holder 1 together with the construction cam 17. At this time, the pushing of each tumbler 12 is released, and each tumbler 12 is engaged with the first engagement groove 8 in the holder 1. Further, the side bar 13 is pushed by the side edge of the tumbler 12 a on the front side and protrudes from the cylinder body 2 to engage with the second engagement groove 9 in the holder 1.

After that, the holder 1 is screwed to the cover 3. At this time, the light storage member 30 and the protection member 31 are arranged between the inner peripheral edge of the cover 3 and the front end surface of the holder 1.

In the building cylinder lock thus assembled, as shown in FIG. 6, the rear tumbler 12b is engaged with the construction cam 17, and the construction cam 17 rotates together with the cylinder body 2.
Therefore, at this stage, the construction cam 1
7 can be unlocked by inserting a construction key that does not operate the rear tumbler 12b that engages with the rear tumbler 12a and immerses the remaining front tumbler 12a into the cylinder body 2.

The building cylinder lock is connected to a building door 40.
The rear end of the holder 1 is inserted into a hole 41a formed in the front panel 41, and positioning in the rotational direction is performed by the ridge 4. Then, from the rear surface of the rear panel 42 of the door,
Then, the rear end opening of the cover 3 is brought into pressure contact with the front panel 41 by using the mounting base 44 to complete the mounting on the door 40.

According to the building cylinder lock mounted on the door 40 in this manner, the portion covered by the cover 3 protrudes from the front surface of the door 40, so that the key can be easily inserted. If a long-length user key is used, the unlocking and locking operations can be performed only by the user key as described below.

That is, by inserting the user key having a long overall length, as shown in FIG. 7, not only the front tumbler 12a engaged with the engaging groove of the holder 1 but also the rear tumbler 12 engaged with the construction cam 17. Tumbler 12b
Also move. Thereby, the construction cam 17
Is slid to the front side by the urging force of the spring 18, and the engaging projection 19 is engaged with the engaging concave portion 11 of the holder 1 and cannot be rotated. Therefore, at this stage, even if the construction key is inserted, the rear tumbler 12b engaged with the construction cam 17 integrated with the holder 1 cannot be immersed in the cylinder body 2, and the unlocking operation cannot be performed. It is impossible to do. On the other hand, if a long user key is used, the rear tumbler 12b is immersed in the cylinder body 2 together with the front tumbler 12a, and the user key 36 is rotated to rotate the cylinder body 2 in the holder 1. By doing so, it is possible to perform an unlocking or locking operation.

In the above-described embodiment, the building cylinder lock is provided independently of the knob (not shown) of the door 40. However, the knob and the locking portion which comes and goes from the side edge of the door 40 by its rotation. May be provided integrally with the knob device.

[0030]

As is apparent from the above description, according to the present invention, in addition to the tumblers which enter into the cylinder body by inserting the key, the notches of each tumbler are aligned to enter the cylinder body. Since the side bar is provided, the anti-theft property is excellent.

In particular, since the holder is provided so as to protrude from the door main body, and its periphery is covered with a cover or provided on a knob device protruding from the door main body, it is most suitable for a building door.

Also, since the construction cam is provided, if the user key is inserted after the construction cam is mounted on the door, the operation cannot be performed by other keys, and the user can use it with peace of mind.

Further, since the protection member is disposed on the front side of the side bar, it is possible to appropriately prevent the side bar from being operated by means other than the key, and to provide a configuration having a further excellent anti-theft property. Becomes possible.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a building cylinder lock according to an embodiment.

FIG. 2 is a vertical sectional view of the building cylinder lock according to the embodiment.

FIG. 3 is a cross-sectional view (a) of the building cylinder lock according to the present embodiment at a position where a side bar is arranged in a key-removed state, and a cross-sectional view of a building with a key inserted (b).
It is.

FIG. 4 is an exploded perspective view of the cylinder body (a) and a perspective view (b) showing a state where a side bar is incorporated.

5A is a perspective view of a construction cam, and FIG. 5B is a perspective view showing a state viewed from the opposite side.

FIG. 6 is a longitudinal sectional view in a plane orthogonal to FIG. 2;

7 is a longitudinal sectional view showing a state after a user key is inserted from the state of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Holder 2 ... Cylinder main body 3 ... Cover 8 ... First engagement groove 9 ... Second engagement groove 11 ... Engagement concave part 12 ... Tumbler 13 ... Sidebar 14 ... Key insertion part 15 ... Tumbler hole 17 ... Construction cam 18 ... Spring 19 ... Engaging projection 20 ... Spring recess 21 ... Tumbler recess 22 ... Key hole 23 ... Notch 30 ... Luminescent member 31 ... Protective member

Claims (6)

[Claims] 1. A holder mounted on a door body for a building and having an engagement groove on an inner peripheral surface thereof, and a cylinder body rotatably provided in the holder, wherein a key is inserted into the cylinder body. A plurality of tumblers that are urged in a direction perpendicular to the direction and in which the cutouts formed in the side edges are aligned by the insertion of the key, and urged toward each of the tumblers, in a state before the key is inserted, A side bar that comes into contact with the side edge of the tumbler, protrudes from the cylinder body, engages with the engaging groove of the holder, and engages with the notch aligned by inserting a key, thereby immersing in the cylinder body. A cylinder lock for a building characterized by being provided. 2. The cylinder lock for a building according to claim 1, wherein the holder is provided so as to protrude from a door main body, and a periphery thereof is covered with a cover. 3. The building cylinder lock according to claim 1, wherein the holder is provided on a knob device protruding from a door body. 4. A holder which is mounted on a door body for a building and has a first engagement groove and a second engagement groove on an inner peripheral surface thereof, and a cylinder body rotatably provided in the holder. The cylinder body is urged in a direction perpendicular to the key insertion to protrude from the cylinder body and engage with the first engagement groove of the holder.
A plurality of tumblers on the front side where the notches formed in the side edges are aligned by being inserted into the cylinder body by the insertion of the key, and are urged toward each tumbler on the front side, before the key is inserted. In this state, the notches aligned with the tumbler are inserted into the cylinder body by inserting a key while being in contact with the side edge of the tumbler and protruding from the cylinder body to engage with the second engagement groove of the holder. The side bar that is immersed in the cylinder body by engaging with the cylinder part, is urged in the direction perpendicular to the key insertion direction, protrudes from the cylinder body, engages with the tumbler on the rear side of the cylinder body, and engages with the cylinder body. When the user key is inserted into the cylinder main body and the tumbler on the rear side is immersed in the cylinder main body, the rotation is prevented by engaging with the holder. And a construction cam that separates and rotates the cylinder body.After inserting a user key into the cylinder body and rotating the cylinder body, the user key is inserted and the rear tumbler is removed. A cylinder lock for a building, wherein the cylinder body can be rotated by being immersed in the cylinder body. 5. The device according to claim 1, wherein a protection member is provided on a front side of the side bar.
A building cylinder lock according to the item. 6. The building cylinder lock according to claim 5, wherein the protection member is made of a hard metal material.