Method for rearranging the inner cylinder holder and pins

Abstract

The present invention provides an inner cylinder holder and a pin rearrangement method that can prevent the pins of the outer cylinder from shifting out of place during the rearrangement process. [Solution] The inner cylinder holder 1 of the embodiment is cylindrical in shape for insertion into and removal from the outer cylinder 20 of a pin cylinder lock, and has a main body 100 having an outer peripheral surface 101 that closes the pin holes 22 disposed on the inner circumference of the outer cylinder 20 when inserted into the outer cylinder 20, and a restricting portion 130 provided on the main body 100 that is movable between a protruding position that protrudes from the outer peripheral surface 101 so as to fit into the pin holes 22 and a retracted position that retracts in contact with the inner peripheral surface of the outer cylinder 20.

Description

Technical Field

[0001] The present invention relates to an inner cylinder holder used for rearranging the arrangement of pins of a pin cylinder lock, and a pin rearranging method using the inner cylinder holder.

Background Art

[0002] A common pin cylinder lock is a device that switches between a state in which rotation of the inner cylinder is restricted and a state in which rotation of the inner cylinder is allowed, among an outer cylinder and an inner cylinder which are a pair of cylindrical bodies coaxially stacked on the inside and outside. The upper pins of the outer cylinder and the lower pins of the inner cylinder, through the combination of their respective lengths and the depth of the key grooves, have their surfaces aligned on the same straight line, forming a shear line that enables the inner cylinder to rotate.

[0003] For this reason, when it is desired to modify an existing pin cylinder lock so that it can be unlocked with a key having a different key groove from before, it is necessary to rearrange the upper pins and lower pins so that a shear line corresponding to the modified key groove can be formed. In addition, when it is desired to prepare a plurality of pin cylinder locks so that a plurality of pin cylinder locks can be unlocked with a common key, it is also necessary to rearrange the upper pins and lower pins.

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Disclosure of the Invention

Problem to be Solved by the Invention

[0005] When removing the upper and lower pins from the pin holes and reinserting them, for the inner cylinder, after removing the inner cylinder from the outer cylinder, insert the spring and lower pin in the order of reassembly. For the outer cylinder, after removing the inner cylinder, insert a cylindrical jig called an inner cylinder holder from the back side, and insert and push in the spring and upper pin from the pin hole on the back side in the order of reassembly, and then sequentially insert the inner cylinder holder so that it covers the pin hole. After inserting all the springs and upper pins, insert the inner cylinder into the outer cylinder from the front side, pushing the inner cylinder forward and then pulling out the inner cylinder holder.

[0006] However, during this reassembly process, the inner cylinder holder may become misaligned or fall out of the outer cylinder. This results in the inner cylinder holder losing its cover over the pin hole, causing the previously inserted upper pin and spring to fall out. Therefore, the upper pin and spring must be reinserted. Furthermore, the reassembly process is a delicate manual task that takes a considerable amount of time. However, if the work is interrupted for a break and the inner cylinder holder is left inserted into the outer cylinder on the table, the inner cylinder holder may become misaligned, leading to the same problem.

[0007] The present invention was proposed to solve the problems of the prior art described above, and its purpose is to provide an inner cylinder holder and a pin rearrangement method that can prevent the pins of the outer cylinder from shifting out of place during the rearrangement of the pins of the outer cylinder. [Means for solving the problem]

[0008] To achieve the above objective, the inner cylinder holder of the embodiment is cylindrical in shape and is inserted into and removed from the outer cylinder of a pin cylinder lock. It has a main body having an outer surface that closes the pin holes disposed on the inner circumference of the outer cylinder when inserted into the outer cylinder, and a restricting portion provided on the main body that is movable between a protruding position that protrudes from the outer surface so as to fit into the pin holes and a retracted position that retracts in contact with the inner surface of the outer cylinder.

[0009] The pin rearrangement method of the embodiment involves inserting the inner cylinder holder into the outer cylinder, inserting the spring and the pin into the pin hole of the outer cylinder, and then advancing the insertion of the inner cylinder holder so that its outer surface covers the pin hole into which the spring and the pin have been inserted, causing the restricting portion to protrude so as to fit into the pin hole into which the spring and the pin have been inserted. [Effects of the Invention]

[0010] According to the present invention as described above, it is possible to provide an inner cylinder holder and a pin rearrangement method that can prevent the pins of the outer cylinder from shifting out of place during the rearrangement of the outer cylinder pins. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view showing the inner cylinder holder and the outer cylinder of the pin cylinder lock according to the embodiment. [Figure 2] (A) is a perspective view showing the inner cylinder holder before insertion into the outer cylinder, and (B) is a perspective view showing it after insertion. [Figure 3] This is an axial cross-sectional view showing the inner cylinder holder of the embodiment. [Figure 4] Figure 3, part AA, is a cross-sectional view showing the inner cylinder holder of the embodiment. [Figure 5] This is an explanatory diagram showing the procedure for replacing the pins of the outer cylinder using the inner cylinder holder. [Modes for carrying out the invention]

[0012] Embodiments of the present invention will be described with reference to the drawings. [composition] As shown in Figures 1, 2(A), and (B), the main body 100 of the inner cylinder holder 1 in this embodiment is cylindrical in shape and is inserted into and removed from the outer cylinder 20 of the pin cylinder lock. The main body 100 has an outer surface 101 that closes the pin holes 22 arranged on the inner circumference of the outer cylinder 20 when inserted into the outer cylinder 20 (see Figure 5(D)). The outer diameter of the main body 100 is, for example, approximately the same as the diameter of the inner cylinder of the pin cylinder lock throughout its entire length. In other words, the outer surface 101 of the main body 100 forms a smooth curved surface overall, and can be inserted into and removed from the outer cylinder 20 in the same way as the inner cylinder.

[0013] Furthermore, the main body 100 is formed to be longer than the axial length of the outer cylinder 20. In this embodiment, the portion with the multiple pin holes 22 is hollow, and the remaining portion is solid (see Figures 3 and 5(B)).

[0014] As shown in Figure 3, the main body 100 has an opening 110, a housing section 120, and a regulating section 130. The opening 110 is formed on the outer circumferential surface 101, and a pin (upper pin) 42 can be inserted into and removed from the pin hole 22. As shown in Figures 1 and 2, the opening 110 in this embodiment is a notched groove formed linearly along the axial direction from the end that is inserted into the outer cylinder 20, i.e., the front end. The width of the opening 110 (length in the direction perpendicular to the axis of the main body 100) is greater than or equal to the diameter of the pin 42 so that the pin 42 can be inserted into and removed.

[0015] As shown in Figures 3 and 4, the housing section 120 is provided inside the main body 100 and can accommodate the pin 42 in a direction that allows the pin 42 to be inserted into the pin hole 22. In this embodiment, the housing section 120 is a groove formed in the solid portion of the main body 100 in the diametrical direction of the main body 100, with one end communicating with the opening 110. The housing section 120 can accommodate the pin 42 and the spring 41 stacked vertically.

[0016] The restricting portion 130 is provided on the main body 100, and is movably provided between a protruding position where it protrudes from the outer peripheral surface 101 to fit into the pin hole 22 (see FIGS. 5(C) and 5(D)) and a retracted position where it retracts in contact with the inner peripheral surface of the outer cylinder 20 (see FIG. 5(B)). The restricting portion 130 of the present embodiment is a ball having a curved surface that is inserted into and removed from the pin hole 22.

[0017] The restricting portion 130 is biased to the protruding position by an elastic member 131. In the present embodiment, the restricting portion 130 and the elastic member 131 are accommodated in a cylindrical cylindrical hole 102 formed in the diameter direction of the main body 100. The elastic member 131 contracts when the restricting portion 130 is pressed, and expands when the pressure applied to the restricting portion 130 is released. As the elastic member 131, for example, a compression coil spring can be used.

[0018] The diameter of the cylindrical hole 102 is substantially the same as the diameter of the restricting portion 130, but is slightly larger than the diameter of the restricting portion 130 so that the restricting portion 130 can move forward and backward. The diameter of one end (the upper end in the drawings) of the cylindrical hole 102 reaching the outer peripheral surface 101 is smaller than the diameter of the cylindrical hole 102, so that although the curved surface of the restricting portion 130 protrudes, the restricting portion 130 does not fall out.

[0019] The other end (the lower end in the drawings) of the cylindrical hole 102 reaching the outer peripheral surface 101 is closed by a closing member 103. The closing member 103 of the present embodiment is a cylindrical screw, and a thread groove into which the closing member 103 can be screwed is formed on the inner periphery of the other end of the cylindrical hole 102. The restricting portion 130 and the elastic member 131 are inserted in this order from the thread groove side end of the cylindrical hole 102, and the closing member 103 is screwed in to close the end. Thereby, the restricting portion 130 is biased by the elastic member 131 such that its curved surface protrudes from one end of the cylindrical hole 102.

[0020] [Pin Reassembly Method] The pin reassembly method according to the present embodiment as described above will be described.

[0021] First, insert the key into the keyhole and rotate the inner cylinder, then insert the main body 100 of the inner cylinder holder 1 into the outer cylinder 20 so as to push the inner cylinder out from the back. After pushing out the inner cylinder, rotate the opening 110 of the main body 100 so that it aligns with the pin hole 22. Then, while moving the main body 100 in the direction of pulling it out from the back, remove the pin 42 and spring 41 from the pin holes 22 as they are successively exposed.

[0022] For example, the pin 42 can be grasped and removed using tweezers or similar tools while preventing it from popping out. The removed pin 42 and spring 41 enter the housing section 120, and their displacement is restricted, allowing for stable removal. The removed pin 42 and spring 41 are kept in a storage location so that their correspondence with the order of the pin holes 22 can be checked later.

[0023] Next, for the inner cylinder, insert the lower pin in the order in which it was assembled. On the other hand, for the outer cylinder 20, as shown in Figures 5(A) to (D), while inserting the main body 100 from the back side, use tweezers or the like to insert and push in the spring 41 and pin 42 from the pin hole 22 on the back side in the order in which it was assembled, and close the pin hole 22 with the outer surface 101.

[0024] In other words, as shown in Figures 5(C) and (D), the insertion of the main body 100 is carried out sequentially so that the pin hole 22 into which the pin 42 is inserted is sequentially covered with the outer surface 101. Furthermore, the position of the pin 42 and spring 41 before insertion into the pin hole 22 is guided by the housing portion 120, so that the tip of the tweezers can be moved precisely toward the pin 42 and spring 41. In addition, the displacement of the pin 42 and spring 41 is restricted by the outer surface 101, so stable insertion is possible.

[0025] During this process, as shown in Figures 5(C) and (D), the restricting portion 130, which has reached the position corresponding to the replaced pin hole 22, fits into the pin hole 22, thereby restricting the movement of the main body 100. This prevents the main body 100 from shifting or coming loose. Furthermore, when moving the main body 100, the restricting portion 130 is pushed against the inner circumference of the outer cylinder 20, causing the restricting portion 130 to retract against the elastic member 131, so that movement is not hindered (see Figure 5(B)).

[0026] After inserting all the springs 41 and pins 42, rotate the main body 100 to an angle where the opening 110 does not align with the pin hole 22. Then, using the inner cylinder, insert the main body 100 into the outer cylinder 20 by pushing it out from the front, thereby preventing the pins 42 from falling out of the pin hole 22, and then remove the main body 100. Rotate the key inserted in the inner cylinder to create a shear line, and then pull out the key.

[0027] [effect] (1) The inner cylinder holder 1 of this embodiment is cylindrical in shape for insertion into and removal from the outer cylinder 20 of a pin cylinder lock, and has a main body 100 having an outer peripheral surface 101 that closes the pin holes 22 disposed on the inner circumference of the outer cylinder 20 when inserted into the outer cylinder 20, and a restricting portion 130 provided on the main body 100 that is movable between a protruding position that protrudes from the outer peripheral surface 101 so as to fit into the pin holes 22 and a retracted position that retracts in contact with the inner peripheral surface of the outer cylinder 20.

[0028] The pin rearrangement method of this embodiment involves inserting the inner cylinder holder 1 into the outer cylinder 20, inserting the spring 41 and pin 42 into the pin hole 22 of the outer cylinder 20, and then continuing to insert the inner cylinder holder 1 so that the outer surface 101 covers the pin hole 22 into which the spring 41 and pin 42 have been inserted, causing the restricting portion 130 to protrude so that it fits into the pin hole 22 into which the spring 41 and pin 42 have been inserted.

[0029] In this way, during the rearrangement of the pin 42, the restricting part 130 protrudes so that it fits into the pin hole 22, making it difficult for the main body 100 to shift position or fall out of the outer cylinder 20. Therefore, it is possible to prevent the pin 42 from falling out of the already inserted pin hole 22. Also, for example, if the work is interrupted for a break during the rearrangement and the main body 100 is placed on the desk with the outer cylinder 20 inserted, it is possible to prevent the main body 100 from shifting position and the pin 42 from falling out.

[0030] (2) The restricting portion 130 has a curved surface that is inserted into and removed from the pin hole 22. Therefore, when moving the outer cylinder 20 relative to the main body 100, the corners do not come into contact, and it can be moved smoothly. In particular, in this embodiment, since the restricting portion 130 is a ball with such a curved surface, both axial movement and rotation around the axis of the main body 100 can be performed smoothly.

[0031] (3) The restricting portion 130 is biased to a protruding position by the elastic member 131. Therefore, when the outer cylinder 20 is moved, it is possible to move the restricting portion 130 to a retracted position against the elastic member 131, and the restricting portion 130 is pressed against the inner circumferential surface of the outer cylinder 20, making it less likely to fall out during movement.

[0032] (4) The main body 100 has an opening 110 formed on its outer surface 101, through which the pin 42 can be inserted and removed from the pin hole 22. Therefore, the pin 42 housed inside the main body 100 can be inserted into the pin hole 22 through the opening 110.

[0033] (5) The restricting portion 130 is positioned on a straight line parallel to the axis of the main body 100 and passing through the opening 110. Therefore, the restricting portion 130 can be fitted into other pin holes 22 adjacent to the pin hole 22 while swapping the pins 42 in the pin hole 22.

[0034] (6) The distance between the innermost end of the opening 110 and the restricting portion 130 is the same as the distance between adjacent pin holes 22. Therefore, the restricting portion 130 can be fitted into the pin hole 22 adjacent to the pin hole 22 being replaced.

[0035] (7) The main body 100 has a housing portion 120 that can accommodate the pin 42 in a direction that allows the pin 42 to be inserted into the pin hole 22. Therefore, by housing the pin 42 in the housing portion 120 inside the main body 100, when inserting the pin 42 into the pin hole 22, the housing portion 120 sets the position of the pin 42 and guides the movement of the pin 42, making it easier to insert the pin 42.

[0036] [Other embodiments] The present invention is not limited to the embodiments described above. (1) The curved surface of the restricting portion 130 should at least be a curved surface that is aligned with the insertion direction of the main body 100. However, a ball would make it easier for the main body 100 to move in the rotational direction.

[0037] (2) The elastic member 131 may be any member that elastically deforms by biasing the restricting portion 130 to a protruding position. For example, it may be made of rubber or the like.

[0038] (3) The shape of the opening 110 is not limited to the above-described embodiment. It does not have to be a notched shape, but a through hole, as long as it has an opening width that allows the pin 42 to be inserted into and removed from the pin hole 22. Also, the front end of the restricting portion 130 on the main body 100 does not need to have an opening 110, as long as the pin 42 can be inserted into and removed from the pin hole 22. Furthermore, the housing portion 120 does not need to be present, as long as the pin 42 can be inserted into and removed from the pin hole 22.

[0039] (4) The pin cylinder lock to which this embodiment applies can be any lock in which a pin tumbler is interposed between the outer cylinder 20 and the inner cylinder to switch between opening and closing. It is not limited to cylinder locks with a single row of pin holes 22. It can also be applied when there are multiple rows of pin holes 22. It may also be a dimple cylinder lock in which the pin holes 22 of the outer cylinder 20 are arranged on two opposing surfaces or two further surfaces. Furthermore, the regulating part 130 may be provided in a position that fits into a pin hole 22 in a different row from the pin hole 22 to be replaced. [Explanation of symbols]

[0040] 1. Inner cylinder holder 20 Outer cylinder 22 pin holes 41 Spring 42 pins 100 Main Unit 101 Outer surface 102 Tube hole 103 Closing member 110 Aperture 120 Storage Units 130 Regulatory Department 131 Elastic members

Claims

1. A cylindrical body that is inserted into and removed from the outer cylinder of a pin cylinder lock, and which has an outer surface that closes the pin holes arranged on the inner circumference of the outer cylinder when inserted into the outer cylinder, A restricting portion is provided on the main body and is movable between a protruding position that protrudes from the outer peripheral surface so as to fit into the pin hole and a retracted position that retracts and contacts the inner peripheral surface of the outer cylinder, An inner cylinder holder characterized by having the following features.

2. The inner cylinder holder according to claim 1, characterized in that the regulating portion has a curved surface that is inserted into and removed from the pin hole.

3. The inner cylinder holder according to claim 2, characterized in that the regulating portion is a ball having the curved surface.

4. The inner cylinder holder according to claim 1, characterized in that the regulating portion is biased to a protruding position by an elastic member.

5. The inner cylinder holder according to claim 1, characterized in that the main body has an opening formed on the outer circumferential surface through which a pin can be inserted and removed from the pin hole.

6. The inner cylinder holder according to claim 5, characterized in that the restricting portion is arranged on a straight line parallel to the axis of the main body and passing through the opening.

7. The inner cylinder holder according to claim 5, characterized in that the distance between the innermost end of the opening and the regulating portion is the same as the distance between adjacent pin holes.

8. The inner cylinder holder according to claim 1, characterized in that it is provided inside the main body and has a housing portion capable of housing the pin in a direction in which the pin can be inserted into the pin hole.

9. While inserting the inner cylinder holder according to any of claims 1 to 8 into the outer cylinder, insert the spring and pin into the pin hole of the outer cylinder. The inner cylinder holder is inserted so that its outer surface covers the pin hole into which the spring and pin have been inserted. The restricting portion is made to protrude so as to fit into the pin hole into which the spring and the pin have been inserted. A pin rearrangement method characterized by the following.

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