JP3598312B2 - Locking structure of safe door - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lock structure of a safe door for closing a safe room of a public telephone, a vending machine, and the like.
[0002]
[Prior art]
As a locking structure of this kind of safe door, there is one disclosed in Japanese Patent Publication No. 5-83710. Disclosed herein are a vault door for closing an opening of a vault, a lock provided to be exposed on the front side of the vault, locked and unlocked by a key operation, and a vault door of the lock. And a locking member that is supported on a lock shaft that protrudes to the back side. The locking member is provided with a plurality of locking portions extending radially around the lock, and the locking members are arranged in a cross shape. By rotating the lock, the locking member is also integrated. , The tip of the locking portion protrudes from the outer periphery of the safe door, and the safe door is locked.
[0003]
[Problems to be solved by the invention]
In the above-described conventional lock structure of a safe door, since a plurality of locking portions are formed integrally with the locking member, the distance from the rotation center of the locking member to the locking portion is reduced. Therefore, the turning radius of the locking portion is increased. For this reason, when locking, it is not possible to take a sufficient amount of protrusion of the locking portion from the outer periphery of the safe door, and it is also not possible to take a sufficient width of the locking portion. There was a problem of being weak. Further, since the lock and the locking member rotate integrally, the rotation angle of the lock becomes the rotation angle of the locking portion as it is, so that it is not easy to adjust the projecting position and the projecting amount of the locking portion. There was also a problem.
[0004]
The present invention has been made in view of the above-described conventional problems, and a first object is to improve the locking strength of a safe door. A second purpose is to facilitate the adjustment.
[0005]
[Means for Solving the Problems]
In order to achieve this object, the invention according to claim 1 is a locking structure of a safe door for closing an opening of a safe room in which a safe is stored, and a key provided to be exposed on a surface side of the safe door. A lock which is locked and unlocked by an operation and a plurality of arms which integrally rotate with a lock shaft protruding from the back side of the safe door of the lock and which has an engagement portion at each end thereof are provided radially. The rotator provided, an engaged portion with which the engaging portion of the arm portion of the rotator is engaged, and a locking portion which is locked at the tip with the locked portion on the opening side of the safe room. and a plurality of locking members provided, the plurality of locking members, so that the engaging portion is movable forward and backward from the outer periphery of the safe door, pivot about an axis differs from the lock shaft, respectively It is freely supported, and by locking the lock, the extending direction of the arm portion of the rotator and the locking portion of the locking member And projecting direction is positioned substantially on a straight line, the forming the engaged portion in a substantially triangular, and is engaged penetration by loosely engagement portion of the arm portion of the turning member.
Therefore, the distance from the rotation center of the locking member to the locking portion is smaller than the distance from the lock to the locking portion, and the turning radius of the locking portion is reduced. Further, even if an external force is applied to the locking portion, it is difficult for a rotational moment to be generated in the arm portion of the rotator. Even if an external force is applied to the locking member, it is difficult to directly transmit the locking member to the rotor.
[0006]
According to a second aspect of the present invention, in the first aspect of the invention, a safe is fixed to the back side of the safe door.
Therefore, when the safe door is removed to the vault, the safe is also removed together.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a public telephone employing a locking structure of a safe door according to the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1, FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 1, FIG. 5 is a rear view of the same main part, (a) shows an unlocked state, and (b) Indicates a locked state.
[0008]
In FIG. 1, a public telephone indicated by reference numeral 1 is provided with a box-like housing 2 in a substantially sealed state, and a coin insertion slot 3 is provided at an upper portion of a front plate of the housing 2. The coin inserted from the insertion slot 3 is guided to a coin sorting orbit (not shown) provided in the housing 2. In this coin sorting orbit, coins determined as pseudo coins are returned from the coin return port 4 provided at the lower part of the front panel of the housing 2, and coins determined as regular coins are temporarily stored in the coin storage orbit. It is configured to be stored in the safe 5 shown in FIG. 2 by a charging signal from the station.
[0009]
A rectangular opening 6 corresponding to the safe 5 is provided at a lower portion of the front plate of the housing 2, and the opening 6 is closed by a safe door 7 described later, and corresponds to the opening 6 as shown in FIG. 2. A safe room 8 for storing a safe 5 is formed in the housing 2. In FIG. 1, reference numeral 9 denotes a dial button, and 10 denotes a handset, which is hung on a hanger 11 provided on a side plate of the housing 2. In FIG. 4, an edge 13 is fixed to the rear surface of the housing 2 and a portion of the edge 13 located at the peripheral end of the opening 6 projects slightly into the opening 6 so as to form a crank-shaped cross section. A receiving portion 13a is formed, and four engaging elements 14 are fixed to four corners on the back surface side of the receiving portion 13a.
[0010]
Next, the safe door unit 15, which is a feature of the present invention, will be described with reference to FIGS.
The safe door unit 15 includes a safe door 7, a lock 16 attached substantially at the center of the safe door 7, a rotator 17 that rotates integrally with a lock shaft 16 a of the lock 16, and a rotator The cover 19 is generally composed of four locking members 18 that rotate so as to follow the rotation of the cover 17 and a cover 19.
[0011]
In FIG. 3, a pair of studs 22, 22 and a pair of studs 23, 23 are implanted in the upper and lower portions of the back surface of the safe door 7, respectively. The stud 23 has a female thread at the tip. On the back surface of the safe door 7, an edge 21 having an outer shape slightly smaller than the outer shape of the safe door 7 is fixed. The lock 16 is attached so that the side provided with the keyhole is exposed from the surface of the safe door 7, and a central portion of the rotator 17 is fixed to a lock shaft 16 a protruding from the back side of the safe door 7, The rotator 17 is configured to rotate integrally with the lock shaft 16a.
[0012]
As shown in FIG. 5, the rotary member 17 has four arms 25 extending radially and integrally formed in a cross shape, and each of the lower surfaces of the distal ends of the arms 25 has an engaging pin. 26 are planted. The four locking members 18 are formed in a substantially flat plate shape, and are supported so as to be rotatable around a pivot 17 around a shaft 27 implanted on the back surface of the safe door 7. ing. Engagement holes 18a each having a substantially triangular shape in a plan view are formed in one end of each of the engagement members 18, and engagement portions 18b are formed in the other end.
[0013]
The engaging pins 26 of the arm portions 25 of the rotator 17 are loosely engaged with the engaged holes 18a of the four locking members 18, respectively. Therefore, when the rotator 17 rotates clockwise or counterclockwise in the figure, the four locking members 18 rotate counterclockwise or clockwise about the shaft 27 as the center of rotation. By rotating counterclockwise as shown in FIG. 7A, the locking portions 18b of all the locking members 18 are positioned inside the outer periphery of the safe door 7, and as shown in FIG. Thus, the locking portion 18b is configured to protrude from the outer periphery of the safe door 7 by rotating clockwise.
[0014]
Here, in the state of FIG. 2B in which the locking portion 18b protrudes from the outer periphery of the safe door 7, a straight line AB connecting the center point A of the locking portion 18b and the center point B of the engaging pin 26 is provided. And a straight line BC connecting the center point B and the center point C of the lock shaft 16a is positioned substantially on a straight line. That is, the projecting direction of the locking portion 18b of the locking member 18 and the extending direction of the arm 25 of the rotator 17 are positioned substantially on a straight line. The straight line AB is configured to be orthogonal to the side 7 a of the safe door 7.
[0015]
As shown in FIG. 3, the cover 19 is formed in a shallow dish shape and is attached to the female thread portion of the stud 23 with a screw 29, so that the cover 19 and the rim 21 as shown in FIG. The lock 16, the rotator 17, and the locking member 18 assembled on the back side are covered. At the center lower end of the four side plates forming the surrounding wall of the cover 19, four notches 18a are provided, from which the locking portions 18b of the locking members 18 protrude. It is configured to be able to.
[0016]
In FIG. 3, the safe 5 has a box shape with an open top, and a rectangular hole 5 a is provided in the front part. The hole 5 a is engaged with a hook part 19 a protruding from the cover 19. The safe 5 is fixed to the cover 19 by screwing the nut 30 to the external thread of the stud 22.
[0017]
Next, a locking operation in the locking structure of the safe door having such a configuration will be described.
First, when a key (not shown) is inserted into the keyhole of the lock 16 and the lock shaft 16a is rotated clockwise in the unlocking direction, that is, as shown in FIG. The stop member 18 rotates counterclockwise about the shaft 27 via the engagement between the engagement pin 26 and the engaged hole 18a. Therefore, the locking portions 18b of the four locking members 18 retreat from the outer periphery of the safe door 7 and are positioned inside the outer periphery.
[0018]
As shown in FIG. 2, the safe door unit 15 to which the safe 5 is integrally fixed is housed in the safe room 8 through the opening 6 of the housing 2, and the outer peripheral edge of the safe door 7 is received by the margin 13. Engage with the part 13a. At this time, the locking member 18 is in the state shown in FIG. 5A, and from this state, a key (not shown) is inserted into the keyhole of the lock 16 and the locking direction, that is, the lock shaft 16 is turned counterclockwise in the figure. , The four locking members 18 rotate clockwise about the shaft 27 via the engagement between the engaging pin 26 and the engaged hole 18a. Since the locking portions 18b of the four locking members 18 protrude from the outer periphery of the safe door 7 as shown in FIG. 4B, the locking portions 18b are attached to the engagement elements 14 as shown in FIG. Engage. Therefore, since the outer peripheral portion of the rim 13 is held between the outer peripheral edge of the safe door 7 and the locking portion 18b, the safe door 7 is locked.
[0019]
In this way, in the locking structure of the safe door of the present invention, as shown in FIG. 5B, the locking member 18 is separated from the rotator 17, and the shaft 27 different from the lock shaft 16a is used as the center of rotation. This reduces the turning radius of the locking portion 18b of the locking member 18. For this reason, the protrusion amount T of the locking portion 18b protruding from the outer periphery of the safe door 7 can be increased, and the lateral width L of the locking member 18 can be formed large. Strength is improved.
[0020]
Further, since the straight line AB and the straight line BC are positioned substantially on a straight line, even if an external force G is applied to the locking portion 18b, a rotational moment is generated in the arm portion 25 of the rotator 17. Nothing to do. For this reason, the locking portion 18b protruding from the outer periphery of the safe door 7 is restricted from returning to the inside of the outer periphery of the safe door 7, so that the locking strength of the safe door 7 is improved. Further, since the play is provided between the engagement pin 26 and the engaged hole 18a, the external force G is temporarily absorbed by the play, so that the external force G is rotated through the locking member 18. It is difficult to directly transmit to the arm 25 of the moving element 17B, and the locking strength of the safe door 7 is improved.
[0021]
The protrusion amount T and the protrusion position of the locking portion 18b of the locking member 18 can be changed by changing the position of the shaft 27, changing the outer shape of the locking member 18, or changing the outer shape of the engaged hole 18a. Can be easily changed, so that the adjustment is easy. Further, since the four locking members 18 are individually rotatably supported by the shaft 27, the locked state is maintained without affecting the remaining locking members 18 even if one is damaged. Therefore, the locking strength is improved.
[0022]
To unlock the safe door 7, a key is inserted into the key hole of the lock 16 from the state shown in FIG. 2B and the unlock direction, that is, the lock shaft 16 a is rotated clockwise in FIG. The locking members 18 rotate counterclockwise about the shaft 27 via the engagement between the engaging pin 26 and the engaged hole 18a. Therefore, the locking portions 18b of the four locking members 18 retreat from the outer periphery of the safe door 7 and are positioned in the outer periphery, and the engagement between the locking portions 18b and the engaging elements 14 is released in FIG. Therefore, the safe door 7 is removed from the opening 6. When the safe door 7 is removed, the safe 5 is also removed from the safe 8 so that it is not necessary to insert a hand into the safe 8 and pull out the heavy safe 5, thereby improving workability. I do.
[0023]
In the present embodiment, the locking portion 18b of the locking member 18 is engaged with the back side of the edge of the opening 6 of the safe room 8, that is, the receiving portion 13a of the rim 13 for locking. As disclosed in Japanese Examined Patent Publication No. 5-83710, the locking portion 18b may be engaged with an elongated hole formed in the enclosure wall of the vault and locked. It is possible.
[0024]
【The invention's effect】
As described above, according to the first aspect of the present invention, the turning radius of the locking portion is reduced, so that the protrusion of the locking portion from the outer periphery of the safe door can be increased, and the locking portion can be locked. Since the width of the portion can be made large, the locking strength of the safe door is improved. Further, the adjustment of the projecting position and the projecting amount of the locking portion becomes easy. In addition, since the locking members are individually rotatably supported, the locked state is maintained without affecting the remaining locking members even if one is damaged. In addition, even when external force is applied to the locking portion during locking, rotation of the lock can be restricted, so that the locking strength of the safe door is further improved. Further, even if an external force is applied to the locking portion, it is difficult to directly transmit the rotation to the rotating member, so that the locking strength of the safe door is improved.
[0025]
According to the second aspect of the present invention, when the safe door is removed from the safe room, the safe is also removed together, thereby improving workability.
[Brief description of the drawings]
FIG. 1 is a front view of a public telephone employing a locking structure of a safe door according to the present invention; FIG. 2 is a sectional view taken along the line II-II in FIG. 1;
FIG. 3 is a sectional view taken along line III-III in FIG.
FIG. 4 is a sectional view taken along line IV-IV in FIG.
FIGS. 5A and 5B are rear views of main parts of the locking structure of the safe door according to the present invention, wherein FIG. 5A shows an unlocked state and FIG. 5B shows a locked state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Pay telephone, 2 ... Housing, 5 ... Safe, 6 ... Opening, 7 ... Safe door, 8 ... Safe room, 15 ... Safe door unit, 16 ... Lock, 16a ... Lock shaft, 17 ... Rotator, 18 ... Locking member, 18a: Engagement hole 18b: Locking portion, 19: Cover, 25: Arm portion, 26: Engagement pin.

Claims (2)

A lock structure of a safe door that closes an opening of a vault where a safe is stored,
A lock that is provided on the front side of the safe door and is locked and unlocked by a key operation,
A rotator provided with a plurality of arms radially provided integrally with a lock shaft protruding to the back side of the safe door of the lock and having an engagement portion at each end thereof;
A plurality of locks each provided with an engaged portion which is engaged with an engaging portion of an arm portion of the rotor and a locking portion which is provided at a distal end with a locked portion which is locked with the locked portion on the opening side of the safe room. And a member,
The plurality of locking members, the locking portion is such that the advance and retreat from the outer periphery of the safe door is rotatably supported pivot about an axis differs from the lock shaft, respectively,
By locking the lock, the extending direction of the arm portion of the rotator and the projecting direction of the locking portion of the locking member are positioned substantially on a straight line, and the engaged portion is formed into a substantially triangular shape. A locking structure for a safe door , wherein the engaging portion of the arm portion of the rotor is loosely engaged . The locking structure for a safe door according to claim 1,
A lock structure for a safe door, wherein a safe is fixed to a back side of the safe door.

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