JP2008050804A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively enhance security by obtaining a cylinder lock capable of inhibiting the drilling and destruction of a locking bar by a simple structure, without internally providing many tool inhibiting members. <P>SOLUTION: This cylinder lock 100 comprises: an outer cylinder 11; an inner cylinder 15 which is provided inside the outer cylinder 11, and which can be freely turned on the axis along the axis line of the outer cylinder 11; a bar storage groove which is formed by notching an inner peripheral surface of the outer cylinder 11 and an outer peripheral surface of the inner cylinder 15; the locking bar which is housed in the bar storage groove and arranged over the outer cylinder 11 and the inner cylinder 15, so as to regulate the turning of the inner cylinder 15, and which is arranged on the side of the inner cylinder 15, so as to release the regulation of the turning of the inner cylinder 15; a plurality of tumblers which are juxtaposed in the inner cylinder 15, and which are equipped with notches turned to a predetermined turning positions depending on a pitch of a duplicate key inserted into the keyhole 17 of the inner cylinder, so as to make the locking bar movable, respectively; and a cutting-resistant tip which is composed of cemented carbide and internally provided at the keyhole opening-side end of the locking bar. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cylinder lock provided with a plurality of substantially C-shaped plate-shaped tumblers that are rotatable about an axis along an axis of an outer cylinder, and in particular, a tumbler in which each is put into a predetermined rotational position by inserting a key. It is related with the improvement technique which delays the cutting destruction action of the locking bar which is moved to the inner cylinder side by this and cancels the rotation restriction of the inner cylinder with respect to the outer cylinder.

  Some cylinder locks are provided with pin-shaped tumblers, and this type of cylinder lock has an outer cylinder and an inner cylinder that is rotatable with respect to the outer cylinder. A pin insertion hole is drilled over both. This pin insertion hole accommodates a driver pin in the outer cylinder side pin insertion hole and a tumbler pin in the inner cylinder side pin insertion hole, and the key is inserted into the key hole of the inner cylinder so that it matches the key groove of the key. As a result, the boundary between the tumbler pin and the driver pin coincides with the boundary between the outer periphery of the inner cylinder and the inner periphery of the outer cylinder, that is, the shear line, so that the inner cylinder rotates relative to the outer cylinder. It becomes possible to be locked and unlocked. On the other hand, when the key is not inserted, or if a key that is not a key is inserted, the tumbler pin is not placed in the proper position, so the driver pin or tumbler pin crosses the shear line, which causes the rotation of the inner cylinder. Is blocked.

  In recent years, there has been an increase in malicious crimes that destroy cylinder locks being locked and unlock them illegally. In this type of crime, the cylinder lock is unlocked by drilling the shear line of the cylinder lock and the vicinity thereof with a drill from the front of the cylinder lock. For example, there is a cylinder lock disclosed in Patent Document 1 to prevent such an unauthorized unlocking action. This cylinder lock is provided with a pressure-receiving surface that intersects the inner peripheral surface of the outer cylinder in front of the driver pin of the case (outer cylinder), and a large-diameter inner peripheral surface that extends from the pressure-receiving surface to the front surface of the outer cylinder. A bulging portion that slides into contact with the pressure receiving surface and the large-diameter inner circumferential surface is provided on the outer peripheral surface of the plug that is mounted on the front end surface, and a cemented carbide tool blocking member is provided in the through hole provided in the bulging portion. The steel ball is inserted into a steel ball insertion hole that is inserted and intersects at a substantially right angle to the through hole.

This cylinder lock incorporates a steel ball and a tool blocking member in the bulging part of the plug that covers the periphery of the shear line, so that areas that cannot be protected by conventional steel balls, such as key holes, are blocked. By protecting the region protected by the member and not protected by the tool blocking member with the steel ball, the effect of preventing the drill breakage is increased compared to the conventional case.
Japanese Patent Laid-Open No. 9-60362

  Incidentally, some cylinder locks have a disk-shaped tumbler. In this type of cylinder lock, when the key is removed, the locking bar is pressed against the groove of the outer cylinder by a spring. Even if the tumbler is pushed by a spring and tries to rotate the inner cylinder in this state, the notch of the tumbler is not above the locking bar, so it is blocked by the tumbler, and the locking bar becomes the boundary between the outer cylinder and the inner cylinder. The inner cylinder cannot be rotated. On the other hand, when the key is inserted, the tumbler is pushed by the step of the key and rotates and aligns until the notch is above the locking bar. When the inner cylinder is rotated in this state, the locking bar is retracted to the notch of the tumbler, and the inner cylinder can be rotated.

  In this cylinder lock, since the member that finally engages (locks) the outer cylinder and the inner cylinder is one locking bar, it is important for crime prevention to effectively prevent the destruction of only this locking bar. . Therefore, in the locking bar type cylinder lock, even if the configuration in which the plug, the steel ball, and the tool blocking member described above are combined, the structure is complicated and the locking that requires the most resistance to breakage is required. There was a problem that the bar itself was not adequately protected.

  The present invention has been made in view of the above circumstances, and provides a cylinder lock that can prevent the drilling breakage of the locking bar with a simple structure without providing a large number of tool blocking members. The purpose is to improve.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The cylinder lock according to claim 1 of the present invention comprises an outer cylinder 11 and
An inner cylinder 15 provided inside the outer cylinder 11 and rotatable about an axis along the axis 13 of the outer cylinder 11;
A bar receiving groove 23 along the axis 13 formed by cutting out the inner peripheral surface 11a of the outer cylinder 11 and the outer peripheral surface 15a of the inner cylinder 15;
While being accommodated in the bar accommodating groove 23 and arranged over the outer cylinder 11 and the inner cylinder 15, the rotation of the inner cylinder 15 with respect to the outer cylinder 11 is restricted, while the inner cylinder side bar accommodating groove 15b. A locking bar 25 for releasing the rotation restriction of the inner cylinder 15 by being disposed on
The inner cylinder 15 is arranged side by side along the axis 13 and is rotatable about a support shaft 41 along the axis 13. The inner cylinder 15 is inserted into the key hole 17 of the inner cylinder 15. A plurality of tumblers 37 each provided with a notch 43 that forms a retreating space that allows the locking bar 25 to move to the inner cylinder side bar receiving groove 15b by being rotated to a predetermined rotational position;
An anti-cutting tip 47 made of a cemented carbide and provided in an end of the locking bar 25 on the keyhole opening side;
It is characterized by comprising.

  In this cylinder lock, a drilling is performed from the front of the cylinder lock 100 toward the end face of the locking bar 25 by a drill, and the cylinder lock is positioned over the outer cylinder 11 and the inner cylinder 15 and the inner cylinder 15 is rotated with respect to the outer cylinder 11. When the drill is caused to advance along the extending direction of the locking bar 25 that regulates the rocking bar 25, the tip of the drill abuts against the cutting resistant tip 47, slides along the outer surface of the cutting resistant tip 47, and the locking bar extends. Perforation in the direction becomes impossible.

  The cylinder lock according to claim 2 is characterized in that the cutting resistant tip 47 is a sphere.

  In this cylinder lock, the drill that comes into contact with the anti-cutting tip 47 from any direction comes into contact with the spherical surface of the anti-cutting tip 47, and the drill from any direction that is cut toward the end of the locking bar 25. Slips away from the locking bar 25. Moreover, since the cutting-resistant chip 47 is a sphere, the cutting-resistant chip 47 is embedded with a high occupation area with respect to the cross section of the rocking bar 25 formed as a rod-shaped member.

  The cylinder lock according to claim 3 is characterized in that the anti-cutting tip 47 is rotatably provided.

  In this cylinder lock, when the tip of the drill comes into contact with the cutting resistant tip 47, the drill slides in the direction away from the locking bar 25 along the spherical surface of the cutting resistant tip 47, and the cutting resistant tip is caused by contact friction with the drill. 47 rotates.

  The cylinder lock according to claim 4 is characterized in that a plurality of the cutting-resistant tips 47 are provided in a direction along the axis 13.

  In this cylinder lock, the peripheral member of the cutting-resistant tip 47 is cut, and even if the first cutting-resistant tip 47 is removed, the next cutting-resistant tip 47 disposed rearward again prevents drilling of the drill. Become.

  According to the cylinder lock of the first aspect of the present invention, the locking bar that is arranged over the outer cylinder and the inner cylinder to restrict the rotation of the inner cylinder relative to the outer cylinder, and the inner side of the inner cylinder. A plurality of tumblers that can move the locking bar to the inner cylinder side by rotating each to a predetermined rotational position according to the key notch inserted and inserted into the keyhole, and the end of the locking bar on the keyhole opening side Since it was equipped with a cutting resistant tip made of cemented carbide, it drilled from the front of the cylinder lock to the end face of the locking bar with a drill and tried to advance the drill along the extending direction of the locking bar However, when the tip of the drill comes into contact with the cutting resistant tip, the drill slides along the outer surface of the cutting resistant tip, and the drilling in the extending direction of the locking bar becomes impossible. Thereby, it is possible to effectively prevent unauthorized rotation restriction of the inner cylinder caused by drilling and breaking the locking bar with a simple structure without providing many tool blocking members. As a result, the crime prevention property of the cylinder lock provided with the locking bar can be improved at a low cost.

  According to the cylinder lock of the second aspect, since the cutting resistant tip is a sphere, the drill that comes into contact with the cutting resistant tip from any direction can be slid in the direction away from the locking bar. Further, since the cutting-resistant tip is a sphere, the cutting-resistant tip can be embedded with a high occupied area with respect to the cross-section of the locking bar formed as a rod-like member, and The destruction prevention effect can be further enhanced.

  According to the cylinder lock of the third aspect, since the cutting resistant tip is rotatably provided, when the tip of the drill comes into contact with the cutting resistant tip, the drill moves from the locking bar along the spherical surface of the cutting resistant tip. While slipping away, the cutting resistant tip rotates due to contact friction with the drill, and the resistance to breakage of the cutting resistant tip itself is enhanced.

  According to the cylinder lock of the fourth aspect, since a plurality of cutting-resistant chips are provided in the direction along the axis, the peripheral members of the cutting-resistant chips are cut, and even if the first cutting-resistant chip is removed, etc. The next cutting-resistant tip arranged at the rear side again prevents drill drilling, and can further delay the unauthorized rotation restriction release of the inner cylinder by breaking the locking bar in its extending direction, Crime prevention can be further improved.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a cylinder lock according to the invention will be described in detail with reference to the drawings.
1 is a front view of a cylinder lock according to the present invention, FIG. 2 is a bottom view of the cylinder lock shown in FIG. 1, and FIG. 3 is a rear view of the cylinder lock shown in FIG.
The cylinder lock 100 according to the present embodiment includes an outer cylinder 11, an inner shaft provided inside the outer cylinder 11, and an axis along the axis 13 of the outer cylinder 11. Tube 15. A keyhole 17 is provided in the inner cylinder 15. A plate-like tail piece 19 protrudes from the rear end surface of the inner cylinder 15, and the tail piece 19 is connected to a locking / unlocking mechanism of a lock box provided in a door (not shown). The inner cylinder 15 is prevented from slipping forward from the outer cylinder 11 by fitting a locking member, for example, an E-ring 21, to the outer peripheral portion protruding from the rear end surface of the outer cylinder 11.

4 is an AA arrow view of FIG. 1, and FIG. 5 is an BB arrow view of FIG.
5 is formed on the inner peripheral surface 11a of the outer cylinder 11 and the outer peripheral surface 15a of the inner cylinder 15, and the bar receiving groove 23 extends along the axis 13. . The bar accommodation groove 23 includes an outer cylinder side bar accommodation groove 11b and an inner cylinder side bar accommodation groove 15b. A long locking bar 25 is accommodated in the bar receiving groove 23 along the axis 13, and the locking bar 25 can protrude into the outer cylinder side bar receiving groove 11b and can be retracted into the inner cylinder side bar receiving groove 15b. Thus, it is accommodated in the bar accommodating groove 23. The locking bar 25 is urged in a direction to protrude into the outer cylinder side bar accommodating groove 11b by two compression springs 27 and 27 shown in FIG. 4 disposed between the locking bar 25 and the inner cylinder 15.

  The locking bar 25 is accommodated in the bar accommodating groove 23 and is disposed over the outer cylinder 11 and the inner cylinder 15, thereby restricting the rotation of the inner cylinder 15 with respect to the outer cylinder 11, while the inner cylinder side bar accommodating groove. It arrange | positions at 15b and it acts so that the rotation control of the inner cylinder 15 may be cancelled | released.

FIG. 6 is a side view of the locking bar and its neighboring members, and FIG. 7 is an enlarged perspective view of the main part of the locking bar.
As shown in FIG. 7, the lower end portion of the locking bar 25 is formed with tapered surfaces 29 and 29 that become narrower downward, and the locking bar 25 has the tapered surfaces 29 and 29 outside as shown in FIG. It protrudes into the cylinder side bar accommodating groove 11b. Therefore, if the inner cylinder 15 is rotated, the locking bar 25 with the tapered surfaces 29 and 29 protruding into the outer cylinder side bar housing groove 11b is retracted toward the inner cylinder 15 against the compression springs 27 and 27. The inner cylinder 15 can be rotated.

  A transverse groove 31 is formed at the lower end of the central portion of the locking bar 25 in the longitudinal direction. A slit groove 33 shown in FIG. 2 is formed at a position corresponding to the transverse groove 31 at the lower portion of the outer cylinder 11. A retaining plate 35 is fitted into the slit groove 33, and the retaining plate 35 is disposed in the transverse groove 31 of the locking bar 25, thereby increasing the retaining strength of the locking bar 25 along the axis 13.

  As shown in FIG. 4, a plurality of tumblers 37 are arranged inside the inner cylinder 15 along the axis 13 in the present embodiment, as shown in the figure in the present embodiment. A plurality of partition plates 39 are disposed between the tumblers 37. The tumbler 37 is rotatable around the support shaft 41 along the axis 13. The tumbler 37 is formed in a substantially C shape, and one end thereof is supported by the support shaft 41.

  As shown in FIG. 5, a notch 43 is formed at the lower end (outer edge) of the tumbler 37. An uneven portion 45 is formed on the inner side (inner edge portion) of the tumbler 37. The tumbler 37 is rotated to a predetermined rotation position by pressing the concave and convex portions 45 in the notch of the key not shown inserted into the key hole 17, and the notch 43 is positioned above the bar receiving groove 23. The notch 43 disposed above the bar receiving groove 23 forms a receding space. The locking bar 25 can move to the inner cylinder side bar accommodating groove 15b by projecting the standing piece 25a into the retreat space. That is, the rotation restriction of the inner cylinder 15 is released. Therefore, if even one of the plurality of tumblers 37 is not rotated to the predetermined rotation position, the tumbler 37 and the standing piece 25a come into contact with each other to prevent the locking bar 25 from retreating to the inner cylinder side bar accommodating groove 15b. Will be. That is, unlocking is not performed.

  A cutting-resistant tip 47 made of a cemented carbide is provided in the end of the locking bar 25 on the keyhole opening side. The cutting resistant tip 47 can be installed in the locking bar 25 by various methods. For example, the cast rocking bar 25 may be cast. Alternatively, the accommodation hole may be drilled in advance, and the cutting resistant tip 47 may be inserted in a later process. Further, it may be embedded in the forging rocking bar 25. The cutting-resistant chip 47 is made of a hard steel material. As the hard steel material, for example, the wear resistance is good, and the Rockwell hardness is 55 HRc or more on the Rockwell C scale, which is vacuum quenched and tempered. SUJ2 (high carbon chromium bearing steel) or the like can be suitably used.

  The cutting resistant tip 47 is preferably a sphere. By making the cutting-resistant chip 47 into a spherical body, the drill that contacts the cutting-resistant chip 47 from any direction comes into contact with the spherical surface of the cutting-resistant chip 47 and is cut toward the end of the locking bar 25. A drill from an arbitrary direction slides in a direction away from the locking bar 25. Moreover, since the cutting-resistant tip 47 is a sphere, the cutting-resistant tip 47 is embedded in a high occupied area with respect to the cross section of the rocking bar 25 formed as a substantially rod-shaped member. Thereby, the destruction prevention effect of the rocking bar 25 by the drilling direction changing action of the drill can be further enhanced.

  In particular, it is preferable that the cutting resistant tip 47 formed of a sphere is rotatably provided. In this case, when the tip of the drill comes into contact with the cutting resistant tip 47, the drill slides along the spherical surface of the cutting resistant tip 47 in a direction away from the locking bar 25, and the cutting resistant tip 47 is caused by contact friction with the drill. It rotates as the drill rotates. Thereby, the breakage difficulty of the cutting-resistant chip | tip 47 itself will be improved.

  Further, a plurality of cutting resistant tips 47 may be provided in the direction along the axis 13. With such a configuration, even if the peripheral member of the cutting-resistant tip 47 is cut and the first cutting-resistant tip 47 is removed or dropped off, the next cutting-resistant tip 47 disposed rearward is drilled again. This will prevent the perforation. Thereby, the unauthorized rotation regulation cancellation | release of the inner cylinder 15 by carrying out the drilling destruction of the locking bar 25 can further be delayed, and crime prevention can be improved more.

  Therefore, according to the cylinder lock 100 described above, the locking bar 25 that is disposed across the outer cylinder 11 and the inner cylinder 15 to restrict the rotation of the inner cylinder 15 relative to the outer cylinder 11, and the inner cylinder 15 And a plurality of tumblers 37 that allow the locking bar 25 to move to the inner cylinder side by rotating each to a predetermined rotational position in accordance with the increment of the key inserted in parallel in the key hole 17, Since the cutting-resistant tip 47 made of cemented carbide is provided at the end of the keyhole opening side, the drilling is performed from the front of the cylinder lock 100 toward the end face of the locking bar 25 by a drill, and the locking bar 25 is extended. Even if the drill is to be advanced along the direction, the tip of the drill abuts against the cutting-resistant tip 47 and slides along the outer surface of the cutting-resistant tip 47, and the locking bar extends direction Drilling becomes impossible of.

  Thereby, it is possible to effectively prevent unauthorized rotation restriction of the inner cylinder 15 caused by drilling and breaking the locking bar 25 with a simple structure without providing a large number of tool blocking members. As a result, the crime prevention property of the cylinder lock 100 including the locking bar 25 can be improved at a low cost.

It is a front view of the cylinder lock concerning the present invention. It is a bottom view of the cylinder lock shown in FIG. It is a rear view of the cylinder lock shown in FIG. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is a side view of a locking bar and its vicinity member. It is a principal part expansion perspective view of a rocking bar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Outer cylinder 11a ... Outer cylinder inner peripheral surface 13 ... Outer cylinder axis 15 ... Inner cylinder 15a ... Inner cylinder outer peripheral surface 15b ... Inner cylinder side bar accommodation groove 17 ... Key hole 23 ... Bar accommodation groove 25 ... Locking bar 37 ... Tumbler 41 ... Support shaft 43 ... Notch 47 ... Cut-resistant tip 100 ... Cylinder lock

Claims (4)

An outer cylinder,
An inner cylinder provided inside the outer cylinder and rotatable about an axis along the axis of the outer cylinder;
A bar receiving groove along the axis formed by cutting out the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder;
By being disposed in the bar accommodating groove and being disposed across the outer cylinder and the inner cylinder, the rotation of the inner cylinder with respect to the outer cylinder is restricted, while being disposed in the inner cylinder side bar accommodating groove. A locking bar for releasing the rotation restriction of the inner cylinder;
The inner cylinder is arranged in parallel along the axis, and is rotatable around a support axis along the axis, and each is rotated to a predetermined rotational position in accordance with the step of the key inserted into the key hole of the inner cylinder. A plurality of tumblers each having a notch that forms a retreating space that allows the locking bar to move to the inner cylinder side bar accommodating groove;
A cutting-resistant tip made of a cemented carbide inside the end of the locking bar on the keyhole opening side, and
A cylinder lock characterized by comprising:   The cylinder lock according to claim 1, wherein the cutting resistant tip is a sphere.   3. The cylinder lock according to claim 2, wherein the cutting resistant tip is rotatably provided.   The cylinder lock according to claim 3, wherein a plurality of the cutting resistant tips are provided in a direction along the axis.

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