JPH0732139U - Key device - Google Patents

Abstract

(57) [Summary] [Purpose] When the key plate is inserted into the key plate insertion hole of the rotor provided in the rotor case and the key plate insertion hole of the tumbler in the tumbler groove of the rotor, the tumblers are aligned and the rotor is aligned. A key device in which an engagement with a locking groove formed in an inner wall surface of a case is released to enable rotation of the rotor, and the lock cannot be easily released, and when a different key plate is inserted. An object is to provide a key device that does not break. [Structure] The rotor case has a double structure of a first rotor case 14 and a second rotor case 17, and the first rotor case 14 rotates together with the first rotor 10 when a different key plate is inserted. At the same time, when the different key plate is inserted, the rotor second rotor 20 is separated from the first rotor case 14, and the stopper 23 and the lever 25 are disengaged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, when the key plate is inserted into the key plate insertion hole of the rotor provided in the rotor case and the key plate insertion hole of the tumbler in the tumbler groove of the rotor, the tumblers are aligned and are attached to the inner wall surface of the rotor case. The present invention relates to a key device capable of rotating a rotor by being disengaged from a drilled locking groove.

[0002]

[Prior art]

 Next, a conventional example will be described with reference to the drawings. 3 is a longitudinal sectional view of a conventional key device, FIG. 4 is a sectional view when the key plate is inserted in FIG. 3, FIG. 5 is a sectional view taken along the line AA in FIG. 3, and FIG. 6 is BB in FIG. FIG.

In these drawings, reference numeral 1 is a rotor case, and 2 is a key plate having a narrow end surface with a ridged end surface. A rotor 3 is rotatably held in the rotor case 1, and a key plate insertion hole 4 is formed in the center of one end surface of the rotor. A lever 7 connected to a lock device (not shown) by a rod is attached to the other end surface of the rotor 3.

Further, the rotor 3 is provided with a plurality of grooves 5 penetrating in the diametrical direction, and a tumbler 6 is slidably arranged therein. As shown in FIGS. 5 and 5, the tumbler 6 is pushed into the long groove 9 axially formed on the inner wall surface of the rotor case 1 by the repulsive force of the compression coil spring 8 when the key plate 2 is not inserted. Has been. A pair of long grooves 9 are provided for the lock position LK (180 ° intervals), and a pair of 180 ° intervals are provided for the unlock position UK with a shift of about 90 °. The tumbler 6 has a key plate insertion hole 6a into which the key plate 2 is inserted near the center.

In the case of the cylinder lock having this structure, when the key plate 2 is inserted into the key plate insertion hole 4, the key plate 2 penetrates into the key plate insertion hole 6a of the tumbler 6 as shown in FIGS. The tumbler 6 is retracted and aligned at a predetermined position by the edge end surface of the key plate 2, and the rotor 3 (lever 7) which is prohibited by the engagement of the tumbler 6 and the long groove 9 can be rotated. The lock device can be locked / unlocked.

[0006]

[Problems to be solved by the device]

 However, in the case of the key device having the above structure, a different type key plate (a key plate in which a regular mountain end face is not formed on the narrow surface) is inserted into the rotor 3, and the tumbler 6 projects into the long groove 9 of the rotor case 1. Nevertheless, if the rotor 3 is forcibly rotated, the rotor case 1 is rotated while being destroyed, and the lock device can be easily unlocked.

When such an action is performed, the rotor case 1 is destroyed and the entire key device must be replaced. The present invention has been made in view of the above problems, and an object thereof is to provide a key device that cannot be easily unlocked and is not damaged even when a different type key plate is inserted.

[0008]

[Means for Solving the Problems]

 The present invention which solves the above-mentioned problems is provided with a tumbler groove penetrating in the diameter direction, and a rotor main body having a key plate insertion hole penetrating in the axial direction in one end surface, and the other end surface of the rotor main body. A first rotor, which is continuously provided in the axial direction, extends in the axial direction, and has a shaft portion having an oval cross-section near the tip, and a rotor body of the first rotor is rotatably held and A first rotor case in which a first long groove is engraved in the axial direction and an engaging groove is formed on one end surface, and the first rotor case is rotatably held and the shaft of the inner wall surface is A second rotor case having a second long groove formed in the first direction, a tumbler slidably engaged with the tumbler groove of the first rotor and having a key plate insertion hole formed in the central portion, Is provided in the groove, and the tumbler is connected to the first rotor case of the first rotor case. A spring urging in a direction to engage with the long groove, a first protrusion rotatably fitted to the shaft portion of the first rotor and engageable with an engaging groove of the first rotor case, and the first protrusion. A second rotor having a second protrusion that engages with the second long groove of the second rotor case, and the second rotor engages near the tip of the shaft of the first rotor, and one end of the second rotor is engaged. A stopper which is capable of contacting the second rotor and has a protrusion formed on a cylindrical surface; and a lever which has a groove which engages with the cylindrical surface of the stopper and is engaged with the protrusion of the stopper. And a spring for urging one end of the stopper toward the second rotor.

[0009]

[Action]

 In the key device of the present invention, the stopper engaged near the tip of the shaft portion of the first rotor is movable in the axial direction of the shaft portion of the first rotor, and is movable in the circumferential direction of the shaft portion. Is not allowed to rotate. Also, the lever engaged with the cylindrical surface of the stopper can move in the axial direction of the cylindrical surface of the stopper by the engagement of the groove of the lever and the projection of the stopper, and can be moved in the circumferential direction of the cylindrical surface. Is not allowed to rotate. Further, the second rotor is prohibited from rotating by the engagement of the second protrusion and the second long groove of the second rotor case, and is movable only in the axial direction of the shaft portion of the first rotor. .

Then, when the regular key plate is inserted into the key plate insertion hole of the first rotor, the tumblers are aligned and the first rotor becomes rotatable. Then, when the keep plate is rotated, the stopper that engages with the tip end portion of the shaft portion of the first rotor rotates, and the lever rotates.

On the other hand, when the dissimilar key plate is forcibly inserted into the key plate insertion hole of the first rotor, the tumbler rotates in a state of protruding into the first long groove of the first rotor case, and the first rotor case together Rotate. When the first rotor case rotates, the engagement groove of the first rotor case and the first engagement protrusion of the second rotor are released, and the first engagement protrusion of the second rotor is released. Riding on the end surface other than the engaging groove of the first rotor, the second rotor moves in the direction away from the first rotor against the urging force of the spring, pushes the stopper, and the protrusion of the stopper and the groove of the lever. To disengage from. Due to this disengagement, only the first rotor and the first rotor case rotate when the dissimilar keys are turned, and the lever does not rotate. And the destruction of the rotor case does not occur.

[0012]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of an essential part of an embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG.

In the figure, the first rotor 10 has a key plate insertion hole formed in one end surface thereof, and has a rotor body 11 having an internal structure similar to that of the conventional example, and the other end surface of the rotor body 11 in the axial direction. It is composed of a shaft portion 12 arranged in series. An oval portion 12a having an oval cross section is formed near the tip of the shaft portion 12, and the rotor body 11 is provided with a plurality of tumbler grooves 13 penetrating in the radial direction.

The first rotor 10 is rotatably held by the first rotor case 14. On the inner wall surface of the first rotor case 14, four first long grooves 15 are engraved at a pitch of 90 ° in the axial direction similarly to the conventional example, and two engaging grooves 16 are formed on one end surface. Has been formed.

Further, the first rotor case 14 is rotatably held by the second rotor case 17. In the axial direction of the inner wall surface of the second rotor case 17, two second long grooves 18 are engraved at a pitch of 180 °.

A tumbler 19 having a key plate insertion hole 19a formed in the center is slidably engaged with the tumbler groove 13 of the first rotor 10. The tumbler groove 13 is provided with a spring (not shown) that biases the tumbler 19 in a direction in which the tumbler 19 is engaged with the first long groove 15 of the first rotor case 14.

A hole 20 a into which the shaft portion 12 of the first rotor 10 is fitted is formed in the central portion, and the second rotor 20 rotatably fitted into the shaft portion 12 has a first rotor case 14 The first protrusion 21 in the shape of a tooth and engageable with the groove 16 and the second protrusion 22 that engages with the second long groove 18 of the second rotor case 17 are formed. Therefore, the second rotor 20 can move along the axial direction of the shaft portion 12 of the first rotor 10, but the second long groove 18 and the second protrusion 22 of the second rotor case 17 cannot be moved. Due to the engagement of, rotation is prohibited.

An oval hole 23 a into which the oval portion 12 a of the shaft portion 12 of the first rotor 10 is fitted is formed, and on the cylindrical surface of the stopper 23 having an end portion that can come into contact with the second rotor 20. The protrusion 24 is formed. The stopper 23 is movable in the axial direction of the oval portion 12a by engaging the oval hole 23a and the oval portion 12a, but rotation is prohibited.

A hole 25a that engages with the cylindrical surface of the stopper 23 is formed at one end of the lever 25, and a small hole 25b into which a link connected to a locking device (not shown) is attached is formed at the other end. ing. A groove 26 with which the projection 24 of the stopper 23 is engaged is formed in the circumferential portion of the hole 25a of the lever 25. Therefore, the lever 25 rotates together with the stopper 23 when the protrusion 24 of the stopper 23 is engaged with the groove 26.

Then, the stopper 23 is biased toward the second rotor 20 by the spring 27 whose one end abuts on the inner wall surface of the end face of the first rotor case 17 and the other end abuts on the stopper 23. There is.

Further, in the present embodiment, on the opposing surfaces of the second rotor 20 and the lever 25, the protrusion 20b is engaged on the second rotor 20 side, and on the lever 25 side, the protrusion 20b is engageable. 25 c is formed.

Next, the operation of the above configuration will be described. When a regular key plate is used When the regular key plate is inserted into the key plate insertion hole of the first rotor 10 in the state shown in FIG. 1, the tumbler 19 is aligned in the first rotor 10 and the first rotor 10 is It can be rotated. Then, when the key plate is rotated, the stopper 23 that engages with the oval portion 12a of the shaft portion 12 of the first rotor 10 rotates, and the lever 25 rotates. By rotating the lever 25, the lock device can be locked / unlocked.

When Different Key Plate is Used When the different key plate is forcibly inserted into the key plate insertion hole of the first rotor 10 in the state of FIG. 1, the tumbler 19 causes the first long groove 15 of the first rotor case 14 to be inserted. The first rotor case 14 rotates together with the first rotor case 14 as it protrudes.

When the first rotor case 14 rotates, the rotation of the second rotor 20 is prohibited. Therefore, the engagement groove 16 of the first rotor case 14 and the first protrusion of the second rotor 20 are prevented. 21 is disengaged, the first protrusion 21 of the second rotor 20 rides on the end surface of the first rotor 10 other than the engaging groove 16, and the second rotor 20 resists the biasing force of the spring 27. Then, the first rotor case 14 moves away from the first rotor case 14.

Then, the second rotor 20 pushes the stopper 23 to release the engagement between the protrusion 24 of the stopper and the groove 26 of the lever 25. Further, due to the movement of the second rotor 20, the projection 20b of the second rotor 20 engages with the recess 25c of the lever 25, and the rotation of the lever 25 is prohibited.

Therefore, by disengaging the protrusion 24 of the stopper and the groove 26 of the lever 25, it is only the first rotor 10 and the first rotor case 14 that rotate even if a different key is rotated. The lever 25 does not rotate and the lock device cannot be unlocked. Further, the destruction of the first rotor case 14 does not occur.

When the dissimilar key plate is returned to its original position, the first protrusion 21 of the second rotor 20 urged by the spring 27 engages with the long groove 15 of the first rotor case 14, It returns to the state of FIG.

According to the above configuration, even if a different type key plate is used, the lock cannot be easily released, and the first and second rotor cases 14 and 17 are not destroyed when the different type key plate is inserted.

[0029]

[Effect of device]

 As described above, according to the present invention, the rotor case has a double structure, the inner rotor case is rotated together with the rotor when the different kind of plate is inserted, and the rotor and the lever are inserted when the different kind of key plate is inserted. By disengaging the engagement, it is possible to realize a key device in which the lock cannot be easily released and the key device is not broken even when a different key plate is inserted.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a longitudinal sectional view of a conventional key device.

FIG. 4 is a cross-sectional view when a key plate is inserted in FIG.

5 is a sectional view taken along line AA in FIG.

6 is a sectional view taken along line BB in FIG.

[Explanation of symbols]

 10 First Rotor 11 Rotor Main Body 12 Shaft Part 13 Tumbler Groove 14 First Rotor Case 15 First Long Groove 17 Second Rotor Case 18 Second Long Groove 19 Tumbler 20 First Rotor 21 First Protrusion 22 Second 2 protrusion 23 stopper 24 protrusion 25 lever 27 spring

Claims (1)

[Scope of utility model registration request] 1. A tumbler groove (13) diametrically extending therethrough.
A rotor main body (11) having a key plate insertion hole penetrating in the axial direction at one end surface thereof, the rotor main body (11) being connected to the other end surface of the rotor main body (11) and extending in the axial direction, Shaft (12) with oval cross section near the tip
A first rotor (10) and a rotor body (11) of the first rotor (10) are rotatably held, and a first long groove (15) is formed in the axial direction of the inner wall surface. , A first rotor case (14) having an engagement groove (16) formed on one end surface, and the first rotor case (14) rotatably held so that the second rotor case (14) is axially arranged on the inner wall surface. A second rotor case (17) having a long groove (18) engraved therein and a key plate insertion hole formed in the central portion thereof so as to be slidable in the tumbler groove (13) of the first rotor (10). An engaged tumbler (19) and a spring provided in the tumbler groove (13) for urging the tumbler in a direction to engage the first long groove (15) of the first rotor (10) case. , Rotatably fitted to the shaft portion (12) of the first rotor (10), Engaging groove of Takesu (14) (1
6) which is engageable with the first protrusion (21) and the second protrusion (22) which engages with the second long groove (18) of the second rotor case (17). Rotor (20)
And the end portion of the shaft portion (12) of the first rotor (10) is engaged, and one end portion of the shaft portion (12) can abut the second rotor (20) and a protrusion (24) is formed on the cylindrical surface. ) Is formed, and the lever (25) is formed with a groove (26) which engages with the cylindrical surface of the stopper (23) and with which the protrusion (24) of the stopper (23) engages. And a spring (27) for urging one end of the stopper (23) toward the second rotor (20).