JP2577146Y2 - Variable code type cylinder lock - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable code type cylinder lock capable of changing a code and restoring the changed code.

[0002]

2. Description of the Related Art When a key is lost or stolen, the cylinder lock must be replaced with a new one in order to prevent theft. Further, even when a clerk handling a pachinko machine, a vending machine, or the like in which the cylinder lock is incorporated is replaced, the cylinder lock needs to be replaced because the original clerk knows the key code.

[0003] However, the work of replacing the cylinder lock installed in the machine each time is cumbersome, requires extra cost, and is inconvenient during the period until the replacement work is completed. In order to solve such a problem, there is a variable code type cylinder lock in which a key code can be changed. As shown in FIG. 7, this variable cord type cylinder lock A is provided with a plurality of driver pin holes 2 penetrating from an inner peripheral surface to an outer peripheral surface in a cylindrical case 1 in the axial direction of the case 1. A cover 3 for closing the driver pin hole 2 is fixed to the outside of the case, and a spring 5 is elastically mounted between the cover and the driver pin 4 inserted into the driver pin hole 2.

The plug 6 rotatably inserted into the inner peripheral surface of the case 1 is provided with a plurality of keyholes 7 and tumbler pin holes 8 penetrating from the keyhole 7 to the outer peripheral surface in the axial direction of the plug 6.
When the plug 6 is at the locking angle, the position of each tumbler pin hole 8 overlaps with the position of each driver pin hole 2. A tumbler pin 9 is inserted into each tumbler pin hole 8, a construction pin 10 is inserted into at least one of the tumbler pin holes 8, and an outer circumferential surface of the plug 6 has the same circle as the tumbler pin hole 8 into which the construction pin 10 is inserted. The accommodation recess 11 is provided on the circumference.

Next, the operation of the construction pin 10 will be described. When the key is not inserted into the key hole 7 of the variable cord type cylinder lock A, the tip of the driver pin 4 pressed by the spring 5 is inserted into the tumbler pin hole 8. Therefore, when the first key is inserted into the keyhole 7, the tumbler pin 9 pressed by the first key pushes the driver pin 4 via the construction pin 10.
The contact surface between the construction pin 10 and the driver pin 4 coincides with the shear line, which is the outer peripheral surface of the plug 6, and the plug 6 can rotate.

When the second key K ₂ is inserted into the key hole 7 of the variable code type cylinder lock A, the construction pin 10 pushed by the tumbler pin 9 is inserted into the driver pin hole 2, and the connection between the tumbler pin 9 and the construction pin 10 is made. Since the contact surface coincides with the shear line, the plug 6 can be turned in this case as well. When the plug 6 is turned in the unlocking direction, the construction pin 10 is fitted into the housing recess 11 (see FIG. 7). ), The first key is converted into an unusable key code.

The demand for the variable code type cylinder lock A is increasing in various fields such as construction sites because the code can be easily changed. In order to return the construction pin 10 accommodated in the tumbler pin 9 to the tumbler pin 9 again, the assembly pin must be disassembled and reassembled, and there is a problem that productivity is reduced. Cord-type cylinder locks are required.

[0008] Figure 8 is a fragmentary vertical cross-sectional view of a variable code type cylinder lock A ₁ which can be changed and the return of the old code in a groove 12 that opens to the outer peripheral surface of the plug 6 from the end of the plug 6 It penetrates the accommodating recess 11, but otherwise is the same as the variable cord type cylinder lock A. Then, the plug 6 is rotated so that the driver pin hole 2 and the housing recess 11 are aligned,
Next, a reset lever (not shown) is inserted into the groove 12.

The tip of the reset lever is formed in a slanted shape, and this tip pushes up the construction pin 10 inserted in the housing recess 11 to the shear line. Pin hole 2
When the tumbler pin hole 8 is matched with the tumbler pin hole 8, the construction pin 10 pushed by the driver pin 4 is pushed back into the tumbler pin hole 8, and the changed code returns to the old code. In the variable code type cylinder lock A _1, it exploded after the operation confirmation test of the code change, while the troublesome effort of reassembly is advantageous in that unnecessary, the following problem has been left.

[0010]

OBJECTS OF THE devised to be Solved] In the variable code type cylinder lock A _1, extruding the construction pin 10 to the driver pin hole 2 by a second key K ₂ inserted into the keyhole 7 and rotate the plug 6, When the driver pin hole 2 is brought close to the accommodation recess 11, the construction pin 10
Is caught in the groove 12 at the periphery (see FIG. 8), and the plug 6
Of the construction pin 10
Are not accommodated in the groove 12. An object of the present invention is to solve the above-mentioned problem, and to provide a variable cord type cylinder lock which can smoothly house and escape the construction pin 10.

[0011]

In order to achieve the above object, the present invention provides a case formed in a cylindrical shape, through which a plurality of driver pin holes communicating with an inner peripheral surface are penetrated. Into the case, a key hole is inserted into a plug rotatably inserted into the case, and the key hole is inserted into the key hole when the plug is at a locking position. A tumbler pin hole communicating with each driver pin hole is provided, a tumbler pin is inserted into each tumbler pin hole, and a construction pin corresponding to the driver pin is inserted into at least one of the tumbler pin holes.
In a variable cord type cylinder lock provided with a housing recess for housing a construction pin on the outer peripheral surface of the plug,
A reset hole penetrating the accommodation recess from the end of the plug is provided, and a reset lever that is detachable is provided in the reset hole, the diameter of the reset hole is smaller than the diameter of the accommodation recess, The position of the reset hole is a position that does not open to the outer peripheral surface of the plug.

[0012]

In order to convert a code using the variable code type cylinder lock configured as described above, the tumbler pin is pushed by the second key inserted into the key hole, and the construction pin pushed by the tumbler pin is inserted into the driver pin hole. insert. At this time, since the contact surface between the tumbler pin and the construction pin coincides with the shear line, the plug is rotatable, and the resetting hole does not open on the outer peripheral surface of the plug even when the housing recess of the plug is close to the driver pin hole. Therefore, the construction pin does not catch on the reset hole, and when the housing recess matches the driver pin hole, the construction pin pressed by the driver pin fits into the housing recess, and the code becomes the second key dedicated code. Be changed.

To return the changed code to the old code,
When the second key is inserted into the key hole and the plug is turned, the receiving recess is aligned with the driver pin hole, and the reset lever is inserted into the reset hole, the construction is pushed by the reset lever and inserted into the driver pin hole. The end face of the pin almost coincides with the shear line. Next, when the plug is rotated, the tumbler pin hole is aligned with the driver pin hole, and the second key is pulled out, the construction pin pressed by the driver pin is inserted into the tumbler pin hole. Return.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description will be omitted. Figure 1 is a upper and lower half of the variable code type cylinder lock A _2, for convenience, is a longitudinal sectional view taken along a different cross-section. In the variable code type cylinder lock A ₂ , a plug 13 is rotatably inserted into the inner peripheral surface of the cylindrical case 1, and the case 1 is provided with a plurality of tumbler pin holes 2 in the axial direction of the case 1. A cover 3 for closing the tumbler pin hole 2 is provided on the outer peripheral surface, and the tumbler pin 4 is urged in a direction protruding from the inner peripheral surface of the case 1 by a spring 5 elastically mounted between the tumbler pin 4 and the cover 3. Is the same as in the conventional example.

The plug 13 is provided with a keyhole 7 and a plurality of tumbler pin holes 8 penetrating the outer peripheral surface from the keyhole. When the plug 13 is at the locking angle, each tumbler pin hole 8 communicates with the driver pin hole 2. Figure 2
The tumbler pin 9 and the construction pin 10 are inserted into the two tumbler pin holes 8 shown in FIG. 1, respectively, and the outer peripheral surface of the plug 13 is provided with a housing recess 11 located on the same circumference as the tumbler pin 9.

As shown in FIG. 6, an annular groove 14 is provided around the rear end of the plug 13 to be inserted into the case 1, and a ring 15 for retaining the annular groove 14 is fitted in the annular groove 14. Cannot move in the direction. A shaft 13a having a rectangular cross section is provided at the rear end of the plug 13, and the shaft 6a is inserted into a rectangular hole 16a provided in the cam 16, so that the rectangular hole 16a is formed.
The two guide grooves 16b provided in the above are used to guide the reset lever 18 to be described later. The cam 16 controls the rotation of the plug 13 from the locking angle to the unlocking angle. A nut (not shown) is screwed into a male screw threaded on the shaft 13a, and the cam 16 is tightened on the shaft 13a. Be worn.

The plug 13 has a housing recess 11 from the rear end.
Is provided with a reset hole 17 penetrating therethrough. The diameter of the resetting hole 17 is smaller than the diameter of the housing recess 11, and the position of the resetting hole 17 is a position that does not open to the outer peripheral surface of the plug 13. The interval C is set to a small size in order to reliably take out the construction pin in the accommodation recess 11 (see FIG. 1).

As shown in FIG. 1, when the tumbler pin holes 8 are provided in the upper and lower portions of the plug 13 and the accommodation recesses 11 are provided in the vicinity of the respective tumbler pin holes 8, a resetting penetrating through the accommodation recess 11 is provided. The number of holes 17 is two. A reset lever 18 having a length penetrating the accommodation recess 11 is removably inserted into the reset hole 17. The distal end portion 18a of the reset lever 18 is formed in an inclined shape, as in the conventional example.

[0019] Next, the operation of the variable code type cylinder lock A ₂ configured as described above will be described with reference to FIGS. When variable code type cylinder lock A ₂ is locked, as shown in FIG. 1, the distal end portion of the driver pin 4 which is pushed by the spring 5 is inserted into the tumbler pin holes 8, the plug 13 is rotated in the unlocking direction I can't.

In such a locked state, the first key K
Upon insertion of the ₁ to keyhole 7, the first key K ₁ is pushed to the tumbler pins 9, the contact surface between the construction pin 10 and the driver pin 4 is equal to the shear line is a peripheral surface of the plug 13. Therefore, the plug 13 becomes rotatable,
It can be rotated in the unlocking angle by the first key K ₁ (see FIG. 2). The diameter of the accommodation recess 11 is
Since the diameter of the driver pin 4 is smaller than that of the driver pin 4, there is no possibility that the tip of the driver pin 4 engages with the housing recess 11.

When converting a code, the first key K ₁
, The second key K ₂ is inserted into the keyhole 7. 2nd key K
_The construction pin 10 is inserted into the driver pin hole 2 by the tumbler pin 9 pushed by ₂ , and the plug 13 can rotate because the contact surface between the tumbler pin 9 and the construction pin 10 coincides with the shear line.

The plug 13 is rotated by the second key K ₂ ,
Even when the accommodation recess 11 is brought close to the driver pin hole 2, there is no groove in which the construction pin 10 is caught, and when the accommodation recess 11 coincides with the driver pin hole 2, the construction pin 10 pressed by the driver pin 4 is moved to the accommodation recess. 11 and the plug 13 is returned to the locking angle, the contact surface between the tumbler pin 9 and the driver pin 4 matches the shear line, so the code is changed to the second key dedicated code (see FIG. 3), and the first key is changed. K ₁ can not be used.

To return the changed code to the old code,
Insert the second key K ₂ into the keyhole 7 (see FIG. 4), and
When the resetting lever 18 is inserted into the resetting hole 17 via the guide groove 16b by rotating the rotary lever 3 so that the housing recess 11 is aligned with the driver pin hole 2, the construction pin is formed by the inclined end portion 18a of the reset lever 18. 10
Is pushed up (see FIG. 5), and the difference in height between the end face of the construction pin 10 and the shear line is a small distance C.
Is equal to

Since both ends of the construction pin 10 have chamfered inclined surfaces 10a and the interval C is small, when the plug 13 is rotated, the construction pin 10 moves onto the outer peripheral surface of the plug 13. When to match the tumbler pin holes 8 to the driver pin hole 2 is pulled out of the second key K _2, the construction pin 10 which is pressed against the driver pin 4 is inserted into the tumbler pin holes 8, FIG. 1
And the changed code returns to the old code.

[0025]

[Effect of the Invention] Since the present invention is configured as described above, the construction pin 1 is used when converting the code.
The problem that the "0" is caught in the groove provided in the accommodation recess is solved, and the code conversion is performed smoothly and reliably.

[Brief description of the drawings]

1 is a longitudinal sectional view showing a locked state of the variable code type cylinder lock A _2.

2 is a longitudinal sectional view of a variable code type cylinder lock A ₂ indicating the insertion state of the first key.

3 is a longitudinal sectional view of a variable code type cylinder lock A ₂ showing a code conversion by the second key.

4 is a longitudinal sectional view of a variable code type cylinder lock A ₂ showing the first stage of the procedure to return the converted code to the old code.

5 is a longitudinal sectional view of a variable code type cylinder lock A ₂ showing a second step of the procedure to return the converted code to the old code.

6 is an exploded perspective view of a variable code type cylinder lock A _2.

FIG. 7 is a longitudinal sectional view of a conventional variable cord type cylinder lock A.

8 is a longitudinal sectional view of a conventional variable code type cylinder lock A ₁ which can be returned to change code the old code.

[Explanation of symbols]

A, A ₁ , A ₂ , variable code type cylinder lock K ₁ first key K ₂ second key 1 case 2 driver pin hole 4 driver pin 5 spring 7 key hole 8 tumbler pin hole 9 tumbler pin 10 construction pin 11 receiving recess 13 plug 16 Cam 17 Reset hole 18 Reset lever 18a Tip

Claims (1)

(57) [Scope of request for utility model registration] A plurality of driver pin holes communicating with an inner peripheral surface are provided through a case formed in a cylindrical shape, and a driver pin and the driver pins are urged toward the inner peripheral surface in the driver pin holes. A spring is inserted, and a key hole is provided in a plug rotatably inserted into the case, and a tumbler pin hole communicating the key hole and each of the driver pin holes when the plug is in the locking position is provided. Inserting a tumbler pin into the hole, inserting a construction pin corresponding to the driver pin into at least one of the tumbler pin holes,
In the variable code type cylinder lock provided with an accommodation recess for accommodating a construction pin on the outer peripheral surface of the plug, a reset hole penetrating the accommodation recess from an end of the plug is inserted into and removed from the reset hole. A variable code type cylinder, wherein a free reset lever is provided, the diameter of the reset hole is smaller than the diameter of the housing recess, and the position of the reset hole is a position not opening on the outer peripheral surface of the plug. Tablets.