JPH07111107B2 - Locking device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a locking device, and more particularly to a dial type locking device used for doors of safes, mailboxes and the like.

"Prior Art" Conventional dial-type locking devices (so-called dial locks) that have been used for doors of safes, mailboxes, etc., generally have dial letters on the surface and projecting hooks at appropriate places on the inside. An inner grip having a knob rotation member and a lock notch portion formed at the rear end of the knob rotation member that is fixedly attached to the knob rotation member by a screw penetrating the center hole of the knob rotation member. A cylindrical body and a projection piece that is rotatably mounted on the inner cylindrical body and engages with the hook at an appropriate position on the front end, and an unlocking notch that matches the notch is formed at the rear end. It is composed of an outer cylinder body and a latch mechanism having a latch plate that is unlocked and locked by being engaged with and disengaged from the notches of the outer cylinder body and the inner cylinder body.

Then, in such a general dial lock,
If the knob turning member is adjusted to the index number, for example, "0", and then turned clockwise or counterclockwise based on the personal identification number,
The notches of the outer cylinder and the inner cylinder coincide with the rear end of the latch plate of the latch mechanism, and the latch plate becomes unlockable.

However, this type of dial lock is convenient because the door of a mail box or the like can be easily opened by rotating the knob rotation member to the left or right based on a specific code number. If it becomes known to others, there is a demerit that it is the so-called end.

Therefore, the present applicant has filed Japanese Patent Application No. 62-111134 (Japanese Patent Laid-Open No. 63-27).
No. 7386), an embodiment of the locking device shown in FIG. 7 was proposed.

That is, to summarize the configuration of the above embodiment, the outer cylinder member 1
A knob rotating member 7 that is rotatably fitted to the outer cylinder member and has a first engaging body 8; and the outer cylinder member that is rotated by a rotating operation of the knob rotating member. A second engaging body 13 which is internally mounted and rotatably fitted on the first engaging body.
And a plurality of engaged bodies 16 installed in the outer tubular member so as to be separated from the plurality of engaging bodies 8 and 13 when the knob rotating member 7 is rotated to be converted into an arbitrary personal identification number. 17 and a latch holder 26 detachably attached to the outer cylinder member 1 that pivotally supports a latch plate 25 that is unlocked and locked by engaging with the notches 20 and 23 of these engaged bodies.

By the way, in the embodiment, although there is an advantage that the personal identification number can be arbitrarily converted when the personal identification number becomes known or can be known to others, when the personal identification number is converted, First, it is necessary to loosen the male screw for fixing the latch holder, then take out the latch holder 26 from the outer cylinder member 1 and then rotate the knob rotating member 7 arbitrarily. There was a drawback that you could not set the security code.

"Object of the Invention" The present invention has been made in view of the above-mentioned drawbacks of conventional dial locks.
It is an object of the present invention to obtain a locking device that can set a desired personal identification number with a simpler operation when converting the personal identification number, and that can be manufactured at a low cost with few components.

[Means for Achieving the Object of the Invention] A locking device of the present invention is an outer cylinder member 41 and a fitting portion 41a of the outer cylinder member that is rotatably fitted to the outer cylinder member 41 and has an engaging tooth at a rear end portion. Five
The knob rotating member 47 integrally having the first engaging body 48 in which 1 is formed, and the knob rotating member 47 through the drive hook 52 or the engaged portion 54 and rotated at the rear end portion. Engagement tooth 55
A second engaging body 53 that is formed on the front surface and has the engaging teeth of the first engaging body on the front end face.
Notch for unlocking with engaging teeth 58 engaging with 51
A first engaged body 56 in which 59 is formed, and the first engaged body 56 is rotatably fitted to the first engaged body 56 and is engaged with the engaging tooth 55 of the second engaging body on the front end face. A second engaged body 57 having an engaged tooth 60 which is formed and a notch 61 for unlocking,
And an arm portion 62 that comes into contact with each rear end surface of the second engaged body.
b has a thickness corresponding to at least each tooth bamboo of the engaged bodies 56 and 57, and is provided in the notch 46 for fitting and removing the stopper piece formed in the outer cylinder portion 41b of the outer cylinder member. A personal identification number conversion stopper piece 62 that is detachably fitted, and the engaged body 5 that is fitted to the outer cylinder member.
It is characterized by comprising notches 59 and 61 for unlocking 6 and 57 and a latch plate which is engaged and disengaged.

In the above structure, it is desirable that the stopper piece is formed in a U shape as a whole so that the latch plate of the latch holder can be pivotally tilted when unlocked.

[Examples] Hereinafter, the present invention will be described in detail with reference to Examples shown in the drawings.

In one embodiment of FIGS. 1 to 6, X is a dial type locking device attached to a door of a safe, a mail box or the like,
In this embodiment, it is fixed to the open end of the door a of the mail box Y.

That is, 41 is an outer cylinder member fixed to the open end of the door a of the mail box Y by a fixing tool 42 such as a nut.
Has a fitting portion 41a formed at the front end thereof, and an outer cylindrical portion 41 penetrating through a mounting hole formed at the door a at the rear end side.
b is formed, and a mounting flange portion 41c that comes into contact with the front surface of the door a is integrally formed between the outer cylinder portion 41b and the fitting portion 41a. Reference numeral 43 is a guide notch portion formed in the axial direction on the upper surface of the outer cylinder portion 41b (when reference is made to FIG. 1) and fitted with a latch holder of a latch mechanism described later. An elongated guide notch 44 for guiding the latch plate of the latch mechanism is formed on the lower surface of the opposing outer cylinder portion 41b.

Reference numeral 45 denotes a notch portion, which will be described later, for taking out a stopper piece, which is formed at an appropriate position on the outer cylinder portion 41b of the outer cylinder member 41. As shown in FIG. 1, the cutout portion 45 is formed at a portion near the center of the outer tubular portion 41b and intersects with the guide cutout portion 43 on the upper surface side. On the other hand, 46 is a notch for inserting a stopper piece having the same mode as the notch 45, and this notch 46 is orthogonal to the guide notch 44 on the lower surface side so as to face the notch on the upper surface side. Is formed. Therefore, in this embodiment, two notches for the stopper piece are provided.

Reference numeral 47 is a knob rotating member that is rotatably fitted to the fitting portion 41a of the outer cylinder member 41 and locks and unlocks by locking or unlocking the movement of the latch plate of the latch mechanism by a rotating operation. Member 47
The surface 47a of is provided with dial characters 0 to 9, for example.

Reference numeral 48 denotes a first engaging body fixed to a recess formed on the back surface of the knob rotating member 47 with a fixing member 49 such as a screw. The first engaging body 48 has a central portion in the axial direction. A female screw 50 corresponding to the through hole 41d formed at the center of the rotating member is formed on the end face of the rear end large diameter portion 48a as shown in FIG. Engaging teeth 51 are formed on.

As shown in FIGS. 2 to 4, the first engaging body 48 is fixed to the pick-and-turn member 47 by a fixing tool 49, and is located inside the fitting portion 41a of the outer cylinder member 41.

52 is formed in an annular shape inside the knob turning member 47 and is
Engaging part fitting part 4 for fitting with the front end small diameter part 48b of the engaging part 48 of
The drive hook is provided on the 7b, and the hook 52 projects from the engaging fitting portion 47b and is integrally planted on the knob rotating member 47.

Reference numeral 53 denotes a tubular second engaging body that is installed in the outer tubular member 41 so as to be turned by the turning operation of the knob turning member 47.
The engaging body 53 of the first engaging body 46 is a small-diameter fitting portion 53a which is fitted on the front-end small-diameter portion 48b of the first engaging body 46 and has an engaged projecting piece 54 which engages with the hook 52 on the front-end surface at an appropriate position. And a large-diameter fitting portion 53b in which a plurality of engaging teeth 55 are formed radially on the rear end surface at predetermined intervals.

Reference numerals 56 and 57 denote outer cylindrical members so as to separate from the above-mentioned first and second engaging bodies 48 and 53 on the side of the knob rotating member when the knob rotating member 47 is rotated to be converted into an arbitrary personal identification number. 41 is a plurality of engaged bodies installed inside.

That is, as shown in FIG. 5, reference numeral 56 denotes a cylindrical first engaged body having a plurality of engaged teeth 58 radially engaged with the first engaging body 48 engaging teeth 51 on the front end surface, A notch 59 for unlocking is formed in the first engaged body 56 in the axial direction. Also
Reference numeral 57 denotes a tubular shape which is rotatably fitted onto the first engaged body 56 and has a plurality of engaged teeth 60 radially engaged with the engaging teeth 55 of the second engaging body 53 on the front end surface thereof. The second engaged body of the
The engaged body 57 is also formed with a notch 61 for unlocking which coincides with the notch 59 when unlocking.

Reference numeral 62 is a notch for fitting and removing the stopper piece of the outer cylinder member 41 described above.
A PIN number converting stopper piece that contacts the rear end surfaces of the first and second engaged bodies 56 and 57 via 46 and 45. The stopper piece 62 utilizes the notches 46 and 45 to form an outer cylinder. Member 41
Is removably fitted into.

Thus, the stopper piece 62 is composed of an arc-shaped connecting portion 62a and two arm portions 62b having elastic force and extending from both ends of the arc-shaped connecting portion 62a, and as shown in FIG. Is formed in a U shape as a whole, and has a thickness corresponding to at least the tooth bamboo of each of the engaging teeth 51, 55 of the engaging bodies 48, 53 described above. It should be noted that each tip portion of the arm portion 62b is formed wide.

64 is a notch for unlocking each of the first and second engaged members 56, 57.
The latch mechanism is detachably mounted on the outer cylinder portion 41b of the outer cylinder member 41 having the latch plate 65 that is unlocked and locked by engaging and disengaging with 59 and 61. The latch mechanism 64 has a substantially cylindrical latch holder. 66 is provided. As shown in FIG. 2, the latch plate 65 has an engaging portion 65a which engages and disengages with a stopper c fixedly provided on the inner side wall b of the door a of the mail box Y at the lower portion. On the other hand, a long hole 65b is formed in the center in the vertical direction, and is attached to a latch holder 66 by a latch pivot pin 67 so as to be vertically movable and tiltable. Further, the guide notch 4 of the outer cylinder member 41 described above is provided on the latch holder 66.
Guide notches 66a that correspond to 3 and 44 and guide the attached latch plate 65 so as to be able to move up and down, and the guide notches 66a.
And a storage portion 66b for storing a coil spring 68 for biasing the tilted latch plate 65 to its original vertical state when the latch plate 665 moves upward or pivots in one direction. ing.

"Operation" In the above configuration, FIG. 2 shows a locked state. In this case, the engaging teeth of the first and second engaging bodies 48, 53
51, 55 and the engaged teeth 58, 60 of the first and second engaging bodies 56, 57 corresponding to the engaging teeth 51, 55 are in an engaged state. Then, in order to maintain this engaged state, the stopper piece 62 is inserted from the notch portion 46 on the lower surface side of the outer tubular member 41, and each arm portion 62b thereof has the first and second engaged bodies 56. , 57 to contact the respective rear end faces. Thus, as shown in the drawing, the notches 59 of the first and second engaged bodies 56, 57,
61 and the upper end portion 65c of the latch plate 65 of the latch mechanism 64 do not coincide with each other. Therefore, even if the door a is pulled through the knob rotating member 47, the latch plate 65 is not attached to the rear end surfaces of the engaged members 56 and 57. Regulated,
Can't tilt.

Next, as shown in FIG. 3, when the knob rotating member 47 is rotated to the left or right based on the personal identification number from the state of FIG. 2, the cutouts 59 and 61 of the first and second engaged bodies 56 and 57 are removed. Upper edge 65c of the latch plate 65
, Indicating that it is in the unlocked state. In this case, when the door a is pulled, the latch plate 65 that engages with the stopper c rotates and tilts until the engagement from the stopper is released, and the upper end portion 65 thereof.
c enters into each unlocking notch 59, 61. Here, explaining the operating state from the locked state to the unlocked state,
First, the knob rotating member 47 is rotated in one direction based on the first personal identification number after being aligned with the index portion or the indicator provided on the mounting flange portion 41c or the like of the outer cylinder member. Then, the drive tab 52 is engaged with the engaged projection 54 to engage the second hook.
At the same time that the engaging body 53 of the
The second engaged body 57, which is in the engagement relationship with and, rotates together in the same direction. On the other hand, based on the following personal identification number, the knob turning member 47
When is rotated in the opposite direction, the first engaged body 56 that engages with the engaging tooth 51 of the first engaging body 48 via the engaged tooth 58 rotates together with the knob rotating member 47, and as a result, , As mentioned above, first
And the notches 59 and 61 of the second engaged members 56 and 57 are latch plates.
It faces the upper end of 65 and is in agreement, and is in the unlocked state.

However, it is assumed that the personal identification number can now be publicly known to others, and therefore, when it is desired to convert the personal identification number into an arbitrary new number, the notch on the upper surface side of the outer cylinder member 41.
An extruding rod (not shown) is appropriately inserted into 45, the tip of the arm portion 62b of the stopper piece 62 is pushed, and as shown in FIG. 4, the arc-shaped connecting portion 62a protruding from the outer tubular portion 41b is pinched with fingers and the outer tubular member. Pull out the stopper piece 62 from 41. Then, the regulation of the first and second engaged bodies 56 and 57 from the stopper piece is released, and the first and second engaged bodies 56 and 57 can be moved backward in the axial direction by an amount corresponding to the thickness of the stopper piece. Therefore, if the knob turning member 47 is turned to the right one or more times and then an arbitrary number is set, the unlocking connection position between the first engaging body 48 and the first engaged body 56 can be obtained. Further, when the knob turning member 47 is turned to the left and is aligned with an arbitrary number, the second engaging body 53
The unlocking connection position between the second engaged body 57 and the second engaged body 57 can be obtained. After setting a new PIN in this way,
The stopper piece 62 is fitted into the notch 46 on the lower surface side of the outer tubular member 41.

"Effects of the Invention" As is apparent from the above description, in the present invention, a plurality of engaging bodies in which the outer tubular member is incorporated and a plurality of engaged bodies corresponding thereto are separated and picked. By rotating the rotating member, it is possible to set a desired personal identification number.

In the case of the embodiment of FIG. 7 previously proposed by the present applicant, first, the male screw of the latch holder (not shown) is loosened, then the latch holder 26 is temporarily removed from the outer cylinder member 1, and then the knob holder is turned. It was necessary to set a new personal identification number after arbitrarily rotating the moving member 7.

However, in the present invention, the arm portion 62b that abuts each rear end surface of the first and second engaged bodies without moving or removing the latch holder 66 is at least the first and second engaged bodies. 56 and 57, each of which has a thickness corresponding to each tooth bamboo, and which is removably fitted into a notch 46 for fitting and removing a stopper piece formed in the outer cylinder part 41b of the outer cylinder member Insert the stopper piece 62 into the outer cylinder member 41.
By simply removing from the notch portion 46, the knob rotating member 47 can be rotated, and a new personal identification number can be set more easily. Further, for example, since there is no need for a component such as a connecting body for integrally connecting a plurality of engaged bodies to the latch holder as in the conventional case, it is easy to assemble and can be manufactured at low cost. There is.

[Brief description of drawings]

FIG. 1 is a plan view showing the embodiment of the present invention attached to a door, FIG. 2 is an explanatory view showing a locked state in an enlarged sectional view taken along line II-II of FIG. 1, and FIG. 2 is an explanatory view showing an unlocked state based on FIG. 4, FIG. 4 is an explanatory view showing a state in which a plurality of engaged bodies are freed by pulling out a stopper piece from the outer cylinder member based on FIG. 3, and FIG. FIG. 6 is an exploded perspective view showing an essential part of the present invention, FIG. 6 is an explanatory view showing an essential part of the present invention, and FIG. 7 is an explanatory view similar to FIG. 2 showing a conventional embodiment. X ... Locking device, a ... Door, c ... Stopper, 41 ... Outer cylinder member, 42, 49 ... Fixing device, 45, 46 ... Notch for stopper piece, 47 ... Knob turning member, 48 ... First engaging member Coupling, 51, 55 ... Engaging teeth, 52 ... Rack, 53 ... Second engaging body, 54 ... Engaged protrusion,
56 ... First engaged body, 57 ... Second engaged body, 59, 61 ... Unlocking notch, 58, 60 ... Engaged tooth, 62 ... Stopper piece,
64 ... Latch mechanism, 65 ... Latch plate, 65a ... Engaging portion, 66 ... Latch holder.

Claims (1)

[Claims] 1. An outer cylinder member 41 and a fitting portion 41a of the outer cylinder member.
A knob rotating member 47 that is rotatably fitted to and has integrally a first engaging body 48 having engaging teeth 51 formed at its rear end.
And the knob rotating member via the drive hook 52 or the engaged portion 54.
A second engaging body 53 which is rotated by 47 and has an engaging tooth 55 formed at a rear end thereof and which is externally fitted to the first engaging body 48; and a front surface of the first engaging body of the first engaging body. A first engaged body 56 having an engaged tooth 58 that engages with the engaging tooth 51 and a notch 59 for unlocking is formed, and the first engaged body 56 is rotatably attached to the outside. A second engaged body 57 which is fitted and has an engaged tooth 60 which engages with the engaging tooth 55 of the second engaging body on the front end face and which has a notch 61 for unlocking formed. , The arm portions 62b that come into contact with the rear end surfaces of the first and second engaged bodies have at least thicknesses corresponding to the tooth bamboos of the engaged bodies 56 and 57, respectively, and the outer tubular member Outer cylinder part 41b
A stopper piece 62 for converting a personal identification number, which is detachably fitted into a notch 46 for fitting and removing a stopper piece formed on the.
And a latch plate that is fitted to the outer cylinder member and that engages and disengages the notches 59 and 61 for unlocking the engaged bodies 56 and 57.