JPH0540551U - Sidebar locking device - Google Patents

Abstract

(57) [Summary] [Object] In the sidebar lock device 10, different key codes are formed by using the tumblers 17 having the same shape. [PROBLEMS] Protrusions 21c to be fitted into respective abutting portions 25 of a plurality of tumblers 17 in an unlocked position are formed at different lateral positions of a side bar 21. The protrusion 21c of the sidebar 21 has a chevron cross section and is formed along an elongated curve, or is constituted by a plurality of protrusions. When the regular key 30 is inserted into the key cylinder 12, each tumbler 17 is moved to a position corresponding to the cut depth of the step of the cutouts 31 to 34 formed in the key 30. The sidebar 2 corresponds to the shape of the cutouts 31 to 34 of the regular key 30.
The protrusions 21c formed at different horizontal positions of one are fitted to the respective contact portions 25 of the tumbler 17, and the side bar 21 is removed from the locking groove 14 of the case 11. Therefore, the key cylinder 12 can be rotated by the key 30 to unlock the sidebar lock device 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to locking devices, especially sidebar locking devices.

[0002]

[Prior Art]

 Sidebar lock devices have great resistance to so-called "picking" and "destruction" and have been developed primarily in the United States. For example, as shown in U.S. Pat. No. 3,080,744, a sidebar lock device has a case having a housing hole formed in a longitudinal direction and is rotatably arranged in the housing hole. And a key cylinder. The key cylinder is provided with a plurality of slots formed in the radial direction and holes formed substantially at right angles to these slots. A plurality of tumblers are slidably disposed within each slot of the key cylinder and have a key hole. A tumbler spring is located between each tumbler and the key cylinder and biases the tumbler to the outside of the key cylinder. Each tumbler is provided with a recess as a contact portion at a different position with respect to the key hole. The side bar is slidably arranged in the hole of the key cylinder and in the locking groove of the case so that the side bar can be engaged with the contact portion of the tumbler. The side bar is biased against the tumbler by the side spring.

In the above structure, when the key is inserted into the sidebar lock device, the tumblers are moved so that the contact portions of the tumblers are aligned in a straight line against the tumbler springs. For this reason, the end portions of the side bars fit into the contact portions of all the tumblers, and the side bars come out of the engaging grooves of the case. In this way, the side bar moves to the retracted position where it does not protrude from the key cylinder, so that the key can be rotated and unlocked. The sidebar lock device has high mechanical strength against breakage, and it is difficult to move all the tumblers to the predetermined positions for engaging the sidebar at the same time when the lock is unlocked. Great resistance to unauthorized unlocking.

[0004]

[Problems to be solved by the device]

 By the way, in the conventional sidebar lock device, it is possible to determine the level difference of the tumbler by visual observation through the key hole. Therefore, the key code of the sidebar lock device can be identified, and the duplicate key can be manufactured.

On the other hand, if the number of steps of the key code increases, the number of types of tumblers correspondingly increases, which complicates the tumbler manufacturing process and increases the code-based management process and the assembly process. is there.

Therefore, an object of the present invention is to provide a sidebar lock device capable of forming different key codes by using tumblers having the same shape.

[0007]

[Means for Solving the Problems]

 The sidebar lock device according to the present invention comprises a case having a housing hole formed in the length direction, a locking groove formed in the length direction in communication with the housing hole, and a key formed in the length direction. A key cylinder having a groove, a plurality of slots formed in the radial direction, and holes formed at substantially right angles to these slots and rotatably arranged in the accommodation hole of the case, and an unlocking position. A plurality of tumblers slidably disposed in each slot of the key cylinder between the locked position and having a key hole, and abutments slidably disposed in the holes of the key cylinder and formed on each tumbler. Side bar that can be engaged with the side bar, a side spring that biases the side bar against the tumbler, a direction that is placed between each tumbler and the key cylinder, and the contact part of the tumbler is removed from the side bar. And a tumbler spring for biasing the tumbler. Protrusions that are fitted to the respective contact portions of the tumblers in the unlocked position are formed at different lateral positions of the side bar. The protrusions of the sidebar have a chevron cross section and are formed along an elongated curve or are constituted by a plurality of protrusions.

[0008]

[Action]

 When a regular key is inserted into the key cylinder, each tumbler is moved to a position corresponding to the cut depth of the notch formed in the key. The protrusions formed at the different lateral positions of the side bar corresponding to the shape of the cutout portion of the regular key are fitted to the respective contact portions of the tumbler, and the side bar is removed from the locking groove of the case. Therefore, the key cylinder can be rotated by the key to unlock the sidebar lock device.

[0009]

【Example】

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

First, as shown in FIGS. 1 and 2, a sidebar lock device 10 according to the present invention has a case 11 and a key cylinder 12 rotatably housed in the case 11. The case 11 has a housing hole 13 formed in the length direction and a locking groove 14 formed in the length direction in communication with the housing hole 13. The key cylinder 12 has a key groove 12a formed in the lengthwise direction, a plurality of slots 15 formed in the radial direction, and a hole portion 16 formed substantially perpendicular to the slots 15. The key cylinder 12 is rotatably arranged in the accommodation hole 13 of the case 11. A plurality of tumblers 17 are slidably disposed in each slot 15 of the key cylinder 12 between a locked position (FIG. 4) and an unlocked position (FIGS. 5-8) and have a key hole 18. The tumbler spring 20 is arranged between each tumbler 17 and the key cylinder 12, and urges the tumbler 17 to the outside of the key cylinder 12.

The side bar 21 is slidably arranged in the hole 16 of the key cylinder 12 and engageable with a contact portion 25 formed as a notch at a different position of each tumbler 17. In this invention, since the key code is given to each tumbler 17, the contact portion 25 is formed at the same position of each tumbler 17 with respect to the key hole 18. The side springs 22 are arranged between the spring seat portions 21a and 21b formed at both ends of the side bar 21 and the respective spring receiving members 23, and urge the side bar 21 against the tumbler 17.

As shown in FIG. 9, the inner wall of the side bar 21 has a mountain-shaped cross section, and a protrusion 21 c is formed along an elongated curve. The protrusions 21c are fitted to the respective contact portions 25 of the tumbler 17 and are formed at different lateral positions of the side bar 21. As another shape, as shown in FIG. 10, the protrusion 21c may be composed of a plurality of protrusions. The protrusion 21c is moved to a position corresponding to the cut depth of the step of the cutouts 31 to 34 formed in the regular key 30.

As shown in FIG. 3, the regular key 30 has, for example, four notch portions 31 to 35 formed at different steps. Before inserting the regular key 30 into the key hole 12a of the key cylinder 12, as shown in FIG. 4, the tumbler 17 is moved to the locking position on the outer side in the radial direction by the elastic force of the tumbler spring 20, and the tumbler 17 is locked. The contact portion 25 is separated from the protruding portion 21c of the side bar 21. Therefore, since the side bar 21 is engaged in the locking groove 14 of the case 11, the key cylinder 12 cannot be rotated. When the regular key 30 is inserted into the key hole 12a of the key cylinder 12, the notches 31 to 35 of the key 30 are locked against the elastic force of the tumbler springs 20 as shown in FIGS. It is moved to the corresponding unlocked position. In the unlocked position, the protrusion 21c of the side bar 21 is fitted in the contact portion 25 of all the tumblers 17, and the side bar 21 is separated from the locking groove 14 and is accommodated in the hole 16 of the key cylinder 12. .. Therefore, the key cylinder 12 can be rotated from the locked position to the unlocked position.

The embodiment of the present invention is not limited to the above-mentioned embodiment, and can be modified. For example, the number of tumblers 17 can be arbitrarily determined in design.

[0015]

[Effect of the device]

 As described above, in the sidebar lock device according to the present invention, different key codes can be formed by using the tumblers having the same shape, so that the tumbler manufacturing process is simplified and the code-based management process and the assembly process are not increased. There are advantages. In addition, it is not possible to determine the level difference of the tumbler by visual observation through the key hole. Therefore, the antitheft effect is significantly improved, and the damage caused by theft can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of a sidebar lock device according to the present invention.

FIG. 2 is an exploded perspective view of a key cylinder.

[Figure 3] Side view of the key

FIG. 4 is a sectional view of the sidebar lock device in a locked state.

FIG. 5 is a cross-sectional view of a sidebar lock device having a tumbler in an unlocked position.

FIG. 6 is a cross-sectional view of a sidebar lock device having a tumbler in an unlocked position.

FIG. 7 is a cross-sectional view of the sidebar lock device having the tumbler in the unlocked position.

FIG. 8 is a cross-sectional view of the sidebar lock device having the tumbler in the unlocked position.

FIG. 9 is a perspective view of a sidebar.

FIG. 10 is a perspective view of a side bar showing another embodiment.
0. ． Sidebar lock device, 11. ． Case, 1
2. ． Key cylinder, 12a. ． Key hole, 13. ． Accommodation hole, 14. ． Locking groove, 15. ． Slot, 1
6. ． Hole, 17. ． Tumbler, 20. ． Tumbler spring, 21. ． Sidebar, 21c. ． Protrusions, 22. ． Side springs, 30. ． Key, 3
1-34. ． Notch,

Claims (3)

[Scope of utility model registration request] 1. A case having a locking groove formed in the length direction in communication with a housing hole formed in the length direction, and a case formed in the diameter direction in communication with a key groove formed in the length direction. Between the unlocked position and the locked position, and a key cylinder having a plurality of slots formed therein and holes formed substantially at right angles to the slots and rotatably arranged in the accommodation hole of the case. A plurality of tumblers slidably arranged in each slot of the cylinder; a side bar slidably arranged in the hole of the key cylinder and engageable with an abutment formed on each tumbler; and a side bar. A side bar having a side spring for urging the tumbler and a tumbler spring arranged between each tumbler and the key cylinder for urging the tumbler in a direction in which a contact portion of the tumbler is removed from the side bar. In the lock device, a side bar lock device is characterized in that projections to be fitted into respective abutting parts of a plurality of unlocked tumblers are formed at different lateral positions of the side bar. 2. The sidebar lock device according to claim 1, wherein the protrusion of the sidebar has a chevron cross section and is formed along an elongated curve. 3. The sidebar lock device according to claim 1, wherein the protrusion of the sidebar is composed of a plurality of protrusions having a chevron cross section.