JP2005273189A - Cap for key-lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap for a key-lock effectively preventing a mischief to a key and a lock because a cap cover is opened by a simple operation by an authorized locking/unlocking person while the cap cover is not opened simply by a person intending to unjustly work the mischief even when the person finds the lock. <P>SOLUTION: A guide hole 17, to which a pin inserting hole 18 is bored in the upward direction on the cap cover side, and a thin-shaft inserting hole 19, in which one end side is made communicate with the guide hole and the other end side is bored towards a peripheral section and to which an inserting hole 19a for an exclusive locking-unlocking key 30 is formed, are formed to a cap base 15. A stopper pin 35 for a magnetic substance having an engaging projecting section 35b on the base section side is fitted movably into the guide hole 17 in a manner that the head section 35a of the stopper pin 35 can be projected and retracted to and from the pin inserting hole 18. A pin engaging recessed section 20c in which a pin receiving port 21 is bored downwards is formed at a place made to communicate with the pin inserting hole 18 when the cap cover 20 is closed and superposed on the cap base, and a magnet 40 attracting the head section of the stopper pin 35 is fitted into the pin engaging recessed section. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a key lock cap suitable for use as a key hole concealing tool by being attached to a key lock such as a cylinder lock.

  Conventionally, as shown in FIG. 5, this type of key lock cap generally has a substantially ring-shaped cap base 2 that is attached on the key lock 1 by connecting a key hole 1 a and a key operation hole 2 a, and a cap base 2. It is comprised by the circular cover-like cap cover 3 which connects so that rotation is possible and opens and closes the key operation hole 2a. When not locked and unlocked, the cap cover 3 is overlaid on the cap base 2 to conceal the key hole 1a for dust prevention and waterproofing of the key hole 1a or to prevent the key hole 1a from being tampered with illegally. On the other hand, when performing a locking / unlocking operation using a dedicated locking / unlocking key, the cap cover 3 is rotated in the opening direction to open the key operation hole 2a, and the key hole 1a is exposed to the outside.

  However, in the conventional lock cap, the keyhole 1a is hidden by the cap cover 3 so that the presence of the lock 1 is usually not easily noticed. Because it has a structure that can be easily opened simply by moving it, it is noticed by the presence of the key lock 1 for those who intentionally mischief by stuffing foreign objects in the keyhole 1a. In other words, since it can be opened easily and instantaneously, there has been a problem that mischief cannot be prevented.

  Therefore, the object of the present invention is to open the cap cover by a simple operation for a legitimate locker / unlocker, but for a person who tries to mischief illegally, it cannot be opened easily even if it is noticed. It is an object of the present invention to provide a key lock cap that effectively prevents mischief against the key lock.

  In order to achieve the object of the invention described above, the invention described in claim 1 is, for example, as shown in the following illustrated embodiment, on the key lock B, the key operation hole 16 is connected to the key hole 13 and fixed. A cap base 15 and a cap cover 20 that is pivotably connected to the cap base 15 to open and close the key operation hole 16. When the cap cover 20 is rotated in the opening direction, the key operation hole 16 In the lock cap A that opens the key hole 13 so that the key hole 13 is exposed to the outside, the cap base 15 has a guide hole 17 with a pin insertion hole 18 formed upward on the cap cover side, and one end of the guide hole 17 and one end thereof. A narrow shaft insertion hole 19 is formed in which the other end side is opened toward the peripheral portion and the insertion port 19a of the external operation member is formed, and a locking projection 35b is provided in the guide hole 17 on the base side. The magnetic stopper pin 35 is loosely fitted so that its head portion 35a can protrude and retract from the pin insertion port 18, while the cap cover 20 is closed when it is overlaid on the cap base 15. A pin engaging recess 20c having a pin receiving opening 21 opened downward is provided at a position communicating with the pin insertion opening 18, and a magnet 40 for attracting the head portion 35a of the stopper pin 35 is fitted into the pin engaging recess 20c. It is characterized by becoming.

  The invention according to claim 2 is the key lock B according to claim 1, in which the external operation member has a thin shaft portion 30a at the tip thereof, for example, as shown in the following embodiment. The special shaft release key 30 is characterized in that the fine shaft insertion hole 19 is formed in a hole shape in which the thin shaft portion 30a of the release / release key 30 can be inserted and removed.

  In the first aspect of the invention, at the time of non-locking / unlocking, the cap cover is closed and overlapped on the cap base, and the key operation hole is closed to hide the key hole. When the cap cover is closed in this way, the magnet attracts the stopper pin, and its head can be engaged with the pin engaging recess to automatically lock the cap cover. On the other hand, when locking and unlocking, an external operation member such as a pin prepared in advance is inserted into the thin shaft insertion hole from its insertion port and locked to the locking projection of the stopper pin, and the stopper pin is pushed down against the magnet. Unlock the head by removing it from the pin engagement recess. Then, the cap cover can be easily turned to expose the keyhole to the outside. Therefore, according to the first aspect of the present invention, the cap cover can be opened by a simple operation for a legitimate locker / unlocker. Even if it is noticed, even if the cap cover closed in the locked state is illegally turned without using an external operation member, it cannot be easily opened. Temporarily, as an external operation member, get a thin pin or shaft around the lock, substitute the external operation member, and open the cap cover unless you insert it into the thin shaft insertion hole and release it. It is not possible. The cap cover cannot be opened unless it is fraudulent and time consuming under the limited conditions that there are such substitutes nearby. Can be prevented.

  In addition, according to the second aspect of the present invention, when the holder of the dedicated locking / unlocking key performs the locking / unlocking operation, it is not necessary to prepare and carry an external operation member separately. Using the lock key, the cap cover is unlocked by simply inserting the thin shaft portion at the tip into the thin shaft insertion hole and releasing it, and the cap cover can be easily opened.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an enlarged longitudinal sectional view showing an example of the key lock cap of the present invention. FIG. 2 is a perspective view showing the key lock cap attached to the key lock, and FIG. 3 is a plan view. The entirety of the key lock cap of the present invention is indicated by symbol A in the figure. In the illustrated example, the key lock cap A is used by being assembled to a key lock B made of a cylinder lock, for example. The key lock B is a well-known cylinder lock, and includes a lock case 11 in which a dead bolt 10 is retractable and a cylinder 12 fixed on the lock case 11, and has a structure in which the key hole 13 is exposed from the upper surface of the cylinder 12. It has become.

  The key lock cap A is composed of a cap base 15 and a cap cover 20 made of, for example, zinc die casting. The cap base 15 has a main body 15a formed in a substantially ring shape as a whole, and a circular fitting recess 15b is provided on the bottom of the main body 15a in FIG. A circular key operation hole 16 is provided so as to penetrate upward from the recessed portion 15b in FIG. As will be described later, when the cap base 15 is mounted on the cylinder 12, the key operation hole 16 is opened at a coaxial position where the center coincides with the key hole 13. The main body 15a is provided with a pivot 15c serving as a pivotal fulcrum on one side with the key operation hole 16 as a center, and a guide hole 17 on the opposite side symmetrical to the pivot 15c.

  The guide hole 17 penetrates in the thickness direction of the main body portion 15a, and a hole portion 17b on the upper side of the lower hole portion 17a in FIG. 1 is formed in a single diameter and opens upward in the upper hole portion 17b. The hole has a pin insertion opening 18. Further, the main body portion 15a is formed with a thin shaft insertion hole 19 in which the lower hole portion 17a of the guide hole 17 communicates with one end side. The thin shaft insertion hole 19 has a hole shape in which the opposite other end is opened toward the upper corner portion 15d of the periphery of the main body, and the insertion port 19a of the external operation member 30 is provided there. In the illustrated example, the external operation member 30 is a release key dedicated to the lock B having a thin shaft portion 30a at the tip. Accordingly, the thin shaft insertion hole 19 is formed as a hidden hole with a thin hole diameter that can be inserted and removed in accordance with the thin shaft portion 30 a of the application release key 30.

  A stopper pin 35 is incorporated into the guide hole 17 in the cap base 15 having such a configuration. The stopper pin 35 is made of a magnetic metal, has a base portion with a large diameter with respect to the thin round shaft head portion 35a, and is provided with a locking convex portion 35b protruding in an annular shape. The stopper pin 35 is inserted into the guide hole 17 from the lower hole portion 17a, and then the inlet of the lower hole portion 17a is closed by the pin lid 14 and assembled. The head 35a is loosely fitted into the guide hole 17 so as to be able to appear and retract from the pin insertion port 18.

  On the other hand, the cap cover 20 has a circular cap shape as a whole having an annular rib 20a on the outer peripheral edge of the back surface on the lower side in the drawing in accordance with the outer shape of the cap base 15. Then, on one side of the annular rib 20a, there is provided a connecting concave portion 20b of a rotation fulcrum corresponding to the support shaft portion 15c of the cap base 15, and on the opposite side symmetrical to the connecting concave portion 20b, a pin insertion port 18 of the guide hole 17 and Pin engaging recesses 20c are provided at corresponding positions. The pin engaging recess 20c is a small hole with a bottom having a pin receiving opening 21 downward in the figure, and a magnet 40 is fitted into the hole. The magnet 40 in the illustrated example is a permanent magnet. Further, as will be described later, the cap cover 20 is positioned at a position corresponding to the insertion port 19a so that the insertion port 19a of the thin shaft insertion hole 19 faces the outside when the cap cover 20 is closed and stacked on the cap base 15. A semicircular concave cutout hole 20d is provided. The key lock cap A is formed by connecting the cap cover 20 to the connection recess 20b of the rotation fulcrum with the support shaft portion 15c and rotating the cap cover 15 to the cap base 15 with screws.

  Now, when the key lock cap A having the above-described configuration is assembled, the upper part of the cylinder of the key lock B is fitted into the fitting recess 15b, and the cap base 15 is screwed onto the cylinder 12. Usually, when unlocking and unlocking, the cap cover 20 is closed and overlapped on the cap base 15, the key operation hole 16 is closed, and the key hole 13 is hidden. When the cap cover 20 is closed in this way, the stopper pin 35 is attracted by the magnet 40, the head portion 35a is attracted through the pin insertion port 18, and engaged with the pin engaging recess 20c to automatically open and close the cap cover 20. To lock.

  On the other hand, at the time of locking / unlocking, when opening the cap cover 20, as shown in FIG. 4, a dedicated locking / unlocking key 30 is used, and the thin shaft portion 30a is passed through the notch hole 20d of the cap cover 20 to The insertion port 19a is inserted into the thin shaft insertion hole 19 to be engaged with the locking projection 35b, the stopper pin 35 is pushed down, the head 35a is separated from the magnet 40, and the engagement with the pin engagement recess 20c is released. Unlock. Then, the cap cover 20 is turned in the opening direction to open the key operation hole 16, and the key hole 13 is exposed to the outside. Then, the lock B is unlocked using the same dedicated unlocking key 30 as it is. After that, when locking again, after locking, the cap cover 20 is turned in the closing direction and superimposed on the cap base 15, and the head 40 a of the stopper pin 35 is attracted by the magnet 40 to engage the pin. The cap cover 20 is automatically locked by engaging with the recess 20c.

  Therefore, when the holder of the dedicated locking / unlocking key 30 opens the cap cover 20 for the locking / unlocking operation in the key lock cap A, the same dedicated locking / unlocking key 30 is used as it is and inserted into the thin shaft insertion hole 19. By simply depressing the stopper pin 35, the locked state of the cap cover 20 is easily released, and the cap cover 20 can be easily opened. On the other hand, even if a person who does not hold the dedicated locking / unlocking key 30 tries to open the cap cover 20 closed in a locked state illegally, it cannot be easily opened. Temporarily, the thin shaft insertion hole 19 is noticed, and a thin pin or shaft is obtained as an external operation member around the lock B, and the external operation member is substituted and inserted into the thin shaft insertion hole 19. The cap cover 20 cannot be opened unless the release operation is performed. Since the cap cover 20 cannot be rotated and opened under the limited conditions of having such a substitute, and without troublesome and time-consuming fraud, it can effectively prevent mischief to the lock. be able to.

It is an expanded longitudinal cross-sectional view which shows an example of the cap for key locks of this invention. It is a perspective view which shows the cap for key locks in the state attached to the key lock. It is a top view which shows the cap for key locks in the state attached to the key lock. It is a longitudinal cross-sectional view which shows an example of the cap for key locks in the state which unlocks using an exclusive locking / unlocking key. It is a schematic explanatory drawing which shows the conventional cap for key locks.

Explanation of symbols

A Lock cap B Key lock 13 Key hole 15 Cap base 16 Key operation hole 17 Guide hole 18 Pin insertion hole 19 Thin shaft insertion hole 20 Cap cover 20c Pin engagement recess 21 Pin receiving port 30 Unlocking key 35 Stopper pin 35a Stopper pin Head 35b locking projection 40 magnet

Claims (2)

A cap base is provided on the key lock. The cap base is connected to the key hole with the key operation hole and fixed, and the cap cover is pivotally connected to the cap base to open and close the key operation hole. In the key lock cap that opens the key operation hole and faces the key hole to the outside when rotated in the direction,
The cap base includes
A guide hole having a pin insertion opening upward on the cap cover side, and a thin shaft insertion hole in which the guide hole and one end side communicate with each other, and the other end side is opened toward the peripheral edge to form an insertion port for an external operation member. In the guide hole, a magnetic stopper pin having a locking projection on the base side is loosely fitted so that its head can protrude and retract from the pin insertion port,
The cap cover includes
When it is closed and overlapped on the cap base, a pin engaging recess having a pin receiving hole opened downward is provided at a position communicating with the pin insertion opening, and the head of the stopper pin is provided in the pin engaging recess. A cap for a key lock, characterized in that a magnet for adsorbing a magnet is fitted. The external operating member is a release key dedicated to the lock having a thin shaft portion at the tip, and the thin shaft insertion hole is formed in a hole shape into which the thin shaft portion of the release key can be inserted and removed. The key lock cap according to claim 1, wherein the cap is a key lock.

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