Locks and safes

Abstract

To provide a locking device capable of moving a locking metal hardware to a locking position after a lock bar for switching an opening state and a closing state of a door surely reaches the closing position.SOLUTION: A locking device 7 includes a lock bar 8 movable between an open position at which a door can be opened and a closed position at which the opening of the door is restricted, a locking portion 9 movable between a locking position at which the movement of the lock bar 8 from the closed position to the open position is restricted and an unlocking position at which the movement of the lock bar 8 from the closed position to the open position is allowed, an in-conjunction movement portion 13 that moves with the movement of the lock bar 8, and a switch 12 that detects the closing and opening of the door based on the position of the in-conjunction movement portion 13. The movement range of the bolt 8 from the closed position to the open position is divided into a first movement range R1 and a second movement range R2. In the second movement range, the in-conjunction movement portion 13 is not moved in conjunction with the movement of the lock bar 8.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a locking device for locking a door and a safe. [Background technology]

[0002] A safe for storing currency is provided with a housing that stores currency inside and has an opening for removing the stored currency, and a door that can be opened and closed to cover the opening. The door is provided with a latch. The latch is movable between an open position where the door can be opened and a closed position where it prevents the door from opening. In the closed position, the latch engages with, for example, a part of the housing to prevent the door from opening.

[0003] The safe is equipped with a locking device. The locking device includes a locking hardware that abuts against the latch in the closed position to prevent the latch from moving to the open position, thereby locking the door so that it cannot be opened. When the locking hardware moves to a position where it no longer abuts against the latch, the safe enters an unlocked state in which the door can be opened.

[0004] Some safe doors have locking hardware that is electromagnetically controlled. When an unlocking operation is received, for example, a solenoid is excited, moving the locking hardware to the unlocked position. This allows the latch to be moved to the open position, allowing the door to be opened. After that, when it is detected that the latch has moved to the closed position, the solenoid is de-energized, moving the locking hardware to the locked position, and the safe is locked.

[0005] For example, the position of the latch is detected by a switch having a contact (see, for example, Patent Document 1). The switch has a movable part, and the contact is switched on and off in conjunction with the movement of the movable part. For example, when the switch contact is on, it detects that the latch is in the open position, i.e., that the door is open, and when the switch contact is off, it detects that the latch is in the closed position, i.e., that the door is closed.

[0006] For example, the latch has a contact portion that contacts and pushes in the movable portion of the switch when it is in the open position, turning the contact on. As the latch moves toward the closed position, the contact portion also moves, releasing the pressure on the movable portion and turning the contact off. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 8-144591 Summary of the Invention [Problem to be solved by the invention]

[0008] In the above-mentioned conventional technology, there is a risk that the switch will turn off before the latch reaches the closed position, i.e., before the door is in the closed state, due to manufacturing errors in the latch and misalignment of the movable part that switches the switch on and off, and the door will be erroneously detected as being in the closed state. In this case, because the latch has not reached the closed position, for example, part of the latch may remain in the path of the locking fitting, preventing the locking fitting from reaching the locked position.

[0009] In this state, if the solenoid is de-energized and the locking hardware is moved to the locked position, the locking hardware cannot reach the locked position, so the latch can be moved to the open position even though the locked state is detected. Therefore, when the latch is moved to the open position, an alarm is sounded, as if the door has been forced open while locked.

[0010] The disclosed technology has been made in consideration of the above, and aims to provide a locking device that can prevent the door from being erroneously detected as being in a closed state before the latch that switches the door between an open state and a closed state reaches the closed position. [Means for solving the problem]

[0011] One aspect of the locking device disclosed in the present application is a locking device for locking a door that closes an opening, and includes a latch that is movable between an open position where the door can be opened and a closed position where the door is restricted from being opened, a locking unit that is movable between a locked position where the latch is restricted from moving from the closed position to the open position and an unlocked position where the latch is allowed to move from the closed position to the open position, an interlocking unit that moves from a first position to a second position as the latch moves from the closed position to the open position, and a locking unit that determines whether the door is closed or not based on the position of the interlocking unit. and a switch that detects whether the latch is open. The first range of movement of the latch from the closed position to the open position is divided into a first range of movement from the closed position to the open position and a second range of movement that is closer to the open position than the first range of movement. The latch is provided with a first abutment portion that does not abut against the interlocking portion when the latch is moving through the second range of movement in the process of moving from the open position to the closed position, but abuts against the interlocking portion when the latch is moving through the first range of movement, thereby moving the interlocking portion from the second position to the first position. [Effects of the Invention]

[0012] According to one aspect of the locking device disclosed in the present application, it is possible to prevent the door from being mistakenly detected as being in a closed state before the latch that switches the door between an open state and a closed state reaches the closed position. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view of a safe according to an embodiment, showing a state in which the door is closed. [Figure 2] FIG. 2 is a perspective view of the safe according to the embodiment, showing a state in which the door is open. [Figure 3] FIG. 3 is a view of the door in the embodiment as seen from the rear side. [Figure 4] FIG. 4 is a diagram schematically showing the relationship between the latch and the recess when the latch is in the closed position in the embodiment. [Figure 5]FIG. 5 is a diagram schematically showing the relationship between the latch and the recess when the latch is in the release position in the embodiment. [Figure 6] FIG. 6 is an enlarged view of part A shown in FIG. 3, showing the locked state. [Figure 7] FIG. 7 is an enlarged view of part A shown in FIG. 3, showing the unlocked state. [Figure 8] FIG. 8 is an enlarged view of part A shown in FIG. 3, showing a state in which the latch is in the open position and the interlocking part is in the first position. [Figure 9] FIG. 9 is an enlarged view of part A shown in FIG. 3, showing a state in which the latch is in the open position and the interlocking part is in the second position. [Figure 10] FIG. 10 is an enlarged view of part A shown in FIG. 3, showing the state in which the latch is positioned at the boundary between the first and second movement ranges as it moves from the open position toward the closed position. [Figure 11] FIG. 11 is a front view of the holding portion in the embodiment. [Figure 12] FIG. 12 is a side view of the holding portion in the embodiment. [Figure 13] FIG. 13 is a diagram showing a modification of the locking device in the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of a currency handling device disclosed in the present application will be described in detail with reference to the accompanying drawings. However, the currency handling device disclosed in the present application is not limited to the following embodiments. [Example]

[0015] (safe) Fig. 1 is a perspective view of a safe according to an embodiment, showing a state in which the door is closed. Fig. 2 is a perspective view of a safe according to an embodiment, showing a state in which the door is open. Note that a safe includes a container and a device in general that stores currency inside a housing. For example, a deposit machine that stores sales proceeds, an automated teller machine, and other currency handling devices are also included in the safe.

[0016] In Figure 1, the width direction of the safe is the X-axis, the front-to-back direction is the Y-axis, and the height direction is the Z-axis. In Figures 1 and subsequent figures, the X-axis, Y-axis, and Z-axis directions are shown in the same way as in Figure 1. Furthermore, when viewing the safe from the front, the left side is the positive direction along the X-axis, and the right side is the negative direction along the X-axis.

[0017] Safe 1 comprises housing 2 with opening 2b formed in part of front surface 2a, and door 3 that can be opened and closed to cover opening 2b. Safe 1 is a container that stores and keeps coins inside housing 2. Door 3 can be locked by a locking device, which will be described later. In the description of this embodiment, "door 3 is closed" simply means that door 3 is blocking opening 2b, and the position of a latch, which will be described later, is not limited. In the description of this embodiment, "door 3 is open" simply means that door 3 is not blocking opening 2b, and the position of a latch, which will be described later, is not limited.

[0018] An operation unit 4 that can be operated by a user of the safe 1 is provided on the top surface 2c of the housing 2. For example, the operation unit 4 is a touch panel. The operation unit 4 is operated, for example, when unlocking the door 3. When an unlocking operation is performed on the operation unit 4, an unlock signal is sent to a locking device, which will be described later.

[0019] A banknote deposit slot 5 and a coin deposit slot 6 are provided on the front surface 2a of the housing 2. In the safe 1, banknotes inserted into the banknote deposit slot 5 are stored inside the housing 2 through the banknote deposit slot 5. In the safe 1, coins inserted into the coin deposit slot 6 are stored inside the housing 2 through the coin deposit slot 6. Of the sides surrounding the opening 2b of the housing 2, one side on the negative side along the X axis has a plurality of recesses 2d formed therein.

[0020] The door 3 is rotatably attached to the side of the housing 2 that surrounds the opening 2b and is opposite the side where the recess 2d is formed. The end of the outer edge of the door 3 that is attached to one side of the opening 2b is called the fixed end, and the opposite side to the fixed end is called the free end. The surface that faces forward when the door 3 is closed is called the front surface 3c, and the back side is called the back surface 3d.

[0021] Fig. 3 is a view of the door in this embodiment as seen from the back side. A locking device 7 is provided on the back side 3d of the door 3. The locking device 7 includes a latch 8, a locking unit 9, a solenoid 10, a link mechanism 11, a switch 12, an interlocking unit 13, a holding unit 14, and a biasing unit 15. Note that in the view of the door 3 as seen from the back side 3d as in Fig. 3, the X-axis, Y-axis, and Z-axis are shown when the door 3 is closed, and this also applies to the subsequent figures.

[0022] The latch 8 is provided on the back surface 3d of the door 3. The latch 8 is provided so as to be slidable in the direction along the X-axis. The latch 8 can be moved by operating a lever 16 provided on the front surface 3c of the door. The position where the latch 8 has moved in the positive direction along the X-axis is a closed position where the door 3 is restricted from opening. The position where the latch 8 has moved in the negative direction along the X-axis is an open position where the door 3 can be opened. The latch 8 has multiple protrusions 8a formed on the end on the positive side along the X-axis.

[0023] Fig. 4 is a diagram showing the relationship between the bar and the recess when the bar is in the closed position in this embodiment. Fig. 5 is a diagram showing the relationship between the bar and the recess when the bar is in the released position in this embodiment. Figs. 4 and 5 are views of the bar 8 and the housing 2 as viewed along the Z axis.

[0024] 4, when the latch 8 is in the closed position, the protrusion 8a formed on the latch 8 is inserted into the recess 2d formed on the edge of the opening 2b of the housing 2. In this state, even if an attempt is made to open the door 3 by pulling the free end of the door 3 in the negative direction along the Y-axis, the protrusion 8a gets caught inside the recess 2d, and the door 3 cannot be opened. In other words, when the latch 8 is in the closed position, the protrusion 8a is inserted into the recess 2d, and the door 3 is in a closed state in which opening is restricted.

[0025] As shown in Figure 5, when the latch 8 moves from the closed position to the released position, the protrusion 8a that was inserted into the recess 2d moves out of the recess 2d. In this state, if the free end of the door 3 is pulled in the negative direction along the Y axis, the protrusion 8a will no longer be caught inside the recess 2d, allowing the door 3 to open. In other words, when the latch 8 is in the released position, the protrusion 8a moves out of the recess 2d, bringing the door 3 into an open state in which it can be opened.

[0026] Fig. 6 is an enlarged view of part A shown in Fig. 3, showing the locked state. Fig. 7 is an enlarged view of part A shown in Fig. 3, showing the unlocked state.

[0027] A bar recess 8b recessed from top to bottom is formed on the upper side 8f of the bar 8. The inner surface of the bar recess 8b facing the positive direction along the X axis serves as a restricting surface 8c that abuts against a locking unit 9, which will be described later. In this embodiment, the bar recess 8b is formed by providing a step on the end of the upper side 8f of the bar 8 facing the positive direction along the X axis.

[0028] The bar 8 is formed with a first contact portion 8d that contacts the interlocking portion 13 and moves the interlocking portion 13 in conjunction with the movement of the bar 8. Details of the movement of the interlocking portion 13 in conjunction with the movement of the bar 8 will be described later.

[0029] The bar 8 is formed with a second contact portion 8e that contacts the holding portion 14 and moves the holding portion 14 in association with the movement of the bar 8. Details of the movement of the holding portion 14 in association with the movement of the bar 8 will be described later.

[0030] As described above, the movement range of the latch 8 is between the closed position and the open position. The movement range of the latch 8 is divided into a first movement range R1, which is a fixed range from the closed position toward the open position, and a second movement range R2, which is closer to the open position than the first movement range R1. In the drawings, the first movement range R1 and the second movement range R2 are indicated by the movement range of the first contact portion 8d.

[0031] The locking unit 9 is a member that restricts the movement of the latch 8, which is in the locked position, to the released position, thereby establishing a locked state in which the door 3 cannot be opened even if an attempt is made to operate the lever 16. The locking unit 9 is held by a guide member 17 so as to be movable in the vertical direction.

[0032] The position to which the locking unit 9 has moved downward is the locked position. As shown in FIG. 6, the locking unit 9 in the locked position is inserted into the latch recess 8b of the latch 8 in the closed position. In this state, even if an attempt is made to move the latch 8 to the released position, the restricting surface 8c abuts against the locking unit 9, preventing the latch 8 from being moved to the released position. In other words, when the locking unit 9 is in the locked position, the door 3 is in a locked state in which it is not possible to open the door 3 even if the lever 16 is operated.

[0033] The position where the locking unit 9 has moved upward is the unlocked position. As shown in FIG. 7, the locking unit 9 in the unlocked position is in a position where it is out of contact with the latch recess 8b of the latch 8 in the closed position. In this state, when an attempt is made to move the latch 8 to the open position, the restricting surface 8c does not come into contact with the locking unit 9, so the latch 8 can be moved to the open position. In other words, when the locking unit 9 is in the unlocked position, the latch 8 is allowed to move to the open position, which is an unlocked state in which the door 3 can be opened by operating the lever 16.

[0034] The solenoid 10 is connected to the locking unit 9 via a link mechanism 11. The solenoid 10 is excited based on the unlock signal described above. When excited, the solenoid 10 moves the locking unit 9 to the unlocked position via the link mechanism 11. The solenoid 10 is de-energized based on a locking signal described below. When de-energized based on the locking signal, the solenoid 10 moves the locking unit 9 to the locked position via the link mechanism 11.

[0035] The switch 12 detects whether the latch 8 is in the open state or the closed state based on the position of the interlocking part 13, which will be described later. The switch 12 comprises a main body 12a and a movable part 12b. A contact (not shown) is provided inside the main body 12a. The movable part 12b is provided so as to be movable relative to the main body 12a. In the switch 12, the contact is turned on when the movable part 12b is pushed toward the main body 12a. In the switch 12, the contact is turned off when the movable part 12b protrudes from the main body. In the safe 1, when the switch 12 is on, the safe detects that the door 3 is in the closed state, and when the switch 12 is off, the safe detects that the door 3 is in the open state.

[0036] In the switch 12, the amount D1 of protrusion of the movable part 12b from the main body 12a when switching from on to off is generally different from the amount D2 of protrusion of the movable part 12b from the main body 12a when switching from off to on. For example, as shown in FIG. 6, D2>D1.

[0037] The interlocking part 13 is a plate-shaped member attached to the door 3 so as to be rotatable around a rotation shaft 18. Fig. 8 is an enlarged view of part A shown in Fig. 3, showing a state in which the latch is in the open position and the interlocking part is in the first position. Fig. 9 is an enlarged view of part A shown in Fig. 3, showing a state in which the latch is in the open position and the interlocking part is in the second position. Fig. 10 is an enlarged view of part A shown in Fig. 3, showing a state in which the latch is located at the boundary between the first and second movement ranges as it moves from the open position to the closed position.

[0038] 8 to 10, interlocking part 13 is movable between a position where it presses movable part 12b of switch 12 and a position where it does not press movable part 12b by rotating around rotation axis 18. As shown in Fig. 8, the position where interlocking part 13 presses movable part 12b of switch 12 is the first position.

[0039] The interlocking part 13 has a long hole 13c formed therein that extends in an arc shape centered on the rotation axis 18. In other words, the long hole 13c is formed to extend along the movement direction of the interlocking part 13. A through-hole 3e formed to protrude from the back surface 3d of the door 3 penetrates the long hole 13c. The movement range of the interlocking part 13 is limited by the through-hole 3e abutting against the inner surface of the long hole 13c.

[0040] The interlocking portion 13 is provided with a first contacted portion 13a that contacts the first contact portion 8d of the bar 8, thereby moving the interlocking portion 13 in conjunction with the movement of the bar 8. Specifically, as shown in FIG. 10 , when the bar 8 reaches the boundary between the first movement range R1 and the second movement range R2 during its movement from the open position to the closed position, the first contacted portion 8d contacts the first contacted portion 13a, and the through portion 3e contacts the inside of the elongated hole 13c at the same position. Therefore, the interlocking portion 13 cannot rotate further downward from the state shown in FIG. 10 . In other words, the elongated hole 13c formed in the interlocking portion 13 and the through portion 3e form a stop mechanism that stops the movement of the interlocking portion 13.

[0041] The position of the interlocking part 13 where the rotational movement is restricted is the position where the interlocking part 13 does not press the movable part 12b of the switch 12, which is the second position. Thereafter, while the latch 8 is moving within the second movement range R2, the first contact part 8d of the latch 8 moves away from the first contacted part 13a of the interlocking part 13, and the interlocking part 13 remains stationary and does not move.

[0042] Furthermore, while the latch 8 is moving through the second movement range R2 from the open position to the closed position, the first abutting portion 8d of the latch 8 is separated from the first abutted portion 13a of the interlocking portion 13, so the interlocking portion 13 remains stationary and does not move. While the latch 8 is moving through the first movement range R1, the first abutting portion 8d of the latch 8 abuts against the first abutted portion 13a of the interlocking portion 13, causing the interlocking portion 13 to rotate upward and push in the movable portion 12b of the switch 12.

[0043] The interlocking portion 13 is provided with a second contacted portion 13b that restricts movement of the interlocking portion 13 by contacting a second holding protrusion 14d formed on the holding portion 14, which will be described later. As shown in Figures 6 and 7, the second contacted portion 13b is formed by forming a recess that recesses in the negative direction along the X-axis at the end that is on the positive direction side along the X-axis when the interlocking portion 13 is in the first position where the movable portion 12b of the switch 12 is pressed in. In this embodiment, the second contacted portion 13b is formed by cutting out a corner of the interlocking portion 13, which is a plate-shaped member.

[0044] Fig. 11 is a front view of the holding unit in the embodiment. Fig. 12 is a side view of the holding unit in the embodiment. The holding unit 14 is a plate-shaped member attached to the door 3 so as to be movable in the direction along the X-axis. A long hole 14a extending in the direction along the X-axis is formed in the holding unit 14. A through-hole 3f formed to protrude from the back surface 3d of the door 3 passes through the long hole 14a. The through-hole 3f passing through the long hole 14a allows the holding unit 14 to move in the direction along the X-axis. In the following description, the position where the holding unit 14 has moved in the negative direction along the X-axis is referred to as the restricted position, and the position where the holding unit 14 has moved in the positive direction along the X-axis is referred to as the non-restricted position.

[0045] The holding portion 14 is formed with a first holding protrusion 14c that protrudes forward. As shown in Fig. 7, when the holding portion 14 is in the restricted position, the first holding protrusion 14c abuts against the second abutted portion 13b of the interlocking portion 13, thereby restricting movement of the interlocking portion 13. Also, as shown in Fig. 8, when the holding portion 14 is in the non-restricted position, the first holding protrusion 14c does not abut against the second abutment portion 8e of the interlocking portion 13, allowing movement of the interlocking portion 13.

[0046] The biasing portion 15 biases the holding portion 14 in the negative direction along the X-axis. For example, the biasing portion 15 is a tension spring.

[0047] The retaining portion 14 is formed with a second retaining protrusion 14d that protrudes rearward. The second retaining protrusion 14d is provided so as to enter the movement path of the second abutting portion 8e of the latch 8. The second retaining protrusion 14d is located on the positive side of the X-axis relative to the second abutting portion 8e. When the latch 8 is in the closed position, the second abutting portion 8e and the second retaining protrusion 14d are separated from each other.

[0048] 7 to 9, when the latch 8 moves a certain distance from the closed position toward the open position and the second contact portion 8e comes into contact with the second retaining projection 14d, the retaining portion 14 also moves from the restricted position to the non-restricted position in accordance with the movement of the latch 8. When the retaining portion 14 moves to the non-restricted position, the first retaining projection 14c also moves to a position where it does not come into contact with the second contacted portion 13b. This allows the interlocking portion 13 to move.

[0049] (Door operation) Next, we will explain the operation from unlocking the safe 1 to opening the door 3. First, the unlocking operation is performed with the operating unit 4, and when an unlock signal is sent, the solenoid 10 is excited. When the solenoid 10 is excited, the locking unit 9 is pulled up and moved to the unlocked position. This allows the latch 8 to move to the open position.

[0050] Next, the lever 16 is operated to move the bar 8 toward the open position. As shown in FIG. 8, as the bar 8 moves toward the open position, the second abutment portion 8e of the bar 8 abuts against the second retaining protrusion 14d of the retaining portion 14. As the bar 8 moves further, the retaining portion 14 also moves, and the first retaining protrusion 14c of the retaining portion 14 moves to a position where it does not abut against the second abutted portion 13b. This allows the interlocking portion 13 to move.

[0051] When the latch 8 moves to the open position, the first abutment portion 8d also moves, causing the interlocking portion 13 to rotate and move downward. When the interlocking portion 13 rotates and moves downward, the movable portion of the switch 12 protrudes, and when the protrusion amount reaches D1, the contact of the switch 12 turns off. When the contact of the switch 12 turns off, the door 3 is detected as being in the open state. When the door 3 is detected as being in the open state, the solenoid 10 is not demagnetized, and the locking portion 9 does not move downward.

[0052] When the latch 8 moves to the open position, the protrusion 8a of the latch 8 moves to the outside of the recess 2d of the housing 2, so that the free end of the door 3 can be moved to open the door 3.

[0053] Next, we will explain the operation from when the door 3 is closed until the safe 1 is locked. First, with the door 3 closed, the lever 16 is operated to move the latch 8 toward the closed position. The latch 8 first moves through the second movement range R2.

[0054] While the bar 8 is moving within the second range of movement R2, the first contact portion 8d of the bar 8 does not come into contact with the first contacted portion 13a of the interlocking portion 13. Therefore, while the bar 8 is moving within the second range of movement R2, the interlocking portion 13 does not move.

[0055] When the latch 8 moves beyond the second range of movement R2 and into the first range of movement R1, the first contact portion 8d comes into contact with the first contacted portion 13a, causing the interlocking portion 13 to rotate and move upward. As the interlocking portion 13 rotates and moves upward, the interlocking portion 13 pushes in the movable portion 12b of the switch 12. When the movable portion 12b is pushed in until it protrudes to a position D2, the contact is turned on.

[0056] When the contact of the switch 12 is turned on, it is detected that the latch 8 is in the closed state. When the latch operation is performed by the operating unit 4 while the latch is in the closed state, the solenoid 10 is de-energized and the locking unit 9 is moved to the locked position. This results in a locked state in which the latch 8 cannot be moved to the open position even if the lever 16 is operated.

[0057] (effect) As described above, the amount of protrusion D1 of the movable part 12b from the main body 12a when the switch 12 is switched from on to off is different from the amount of protrusion D2 of the movable part 12b from the main body 12a when the switch 12 is switched from off to on, with D2 > D1. Therefore, the position of the interlocking part 13 when the open state is detected as the latch 8 moves from the closed position to the open position is different from the position of the interlocking part 13 when the closed state is detected as the latch 8 moves from the open position to the closed position. Specifically, the closed state is detected when the interlocking part 13 is closer to the second position. Therefore, if the interlocking part 13 starts moving and pushes in the movable part 12b immediately after the latch 8 starts moving from the closed position to the open position, the latch 8 may be erroneously detected as being in the closed state before it reaches a position where the locking part 9 can move to the locked position.

[0058] If the locking operation is performed by the operating unit 4 when the closed state is erroneously detected, the solenoid 10 is demagnetized and the locking unit 9 moves toward the locked position. However, when the closed state is erroneously detected, there is a possibility that a portion of the upper edge 8f where the bar recess 8b of the latch 8 is not formed remains in the path of movement of the locking unit 9 toward the locked position. If a portion of the upper edge 8f where the bar recess 8b of the latch 8 is not formed remains in the path of movement of the locking unit 9 toward the locked position, the locking unit 9 cannot reach the locked position. Specifically, the locking unit 9 comes into contact with the upper edge 8f of the latch 8. In the following description, the state in which the locking unit 9 comes into contact with the upper edge 8f of the latch 8 but does not reach the locked position is referred to as an incompletely locked state.

[0059] If the lever 16 is operated in an incompletely locked state, the latch 8 can be moved to the open position, but since the safe 1 is detected as being locked, it is detected that an unauthorized opening operation has been performed on the door 3, i.e., that the door has been forced open, and an alarm is sounded.

[0060] On the other hand, in this embodiment, while the latch 8 is moving from the open position to the closed position and is moving through the second movement range R2, the first abutment portion 8d does not abut against the interlocking portion 13 until the latch 8 has moved a certain distance toward the closed position.

[0061] Therefore, once the latch 8 is brought close enough to a position where the locking unit 9 can move to the locked position, the interlocking unit 13 can be moved to push in the movable unit 12b of the switch 12. Therefore, in this embodiment, it is possible to prevent the latch 8 from being erroneously detected as being in the closed state even though it is not in the closed position, resulting in an incompletely locked state, as was the case in the past. Furthermore, by preventing an incompletely locked state, it is possible to prevent an alarm from being issued when a forced opening is detected.

[0062] Furthermore, while the latch 8 is moving from the open position to the closed position within the first movement range R1, the first contact portion 8d comes into contact with the interlocking portion 13, moving the interlocking portion 13. The movement of the interlocking portion 13 pushes in the movable portion 12b of the switch 12, so that it can be reliably detected that the latch 8 is in the closed position, i.e., that the door 3 is in the closed state.

[0063] Furthermore, when the latch 8 is moving from the closed position to the open position and reaches the boundary between the second range of movement R2 and the first range of movement R1, the movement of the interlocking part 13 is stopped by the contact between the inside of the elongated hole 13c and the through-hole 3e. In this way, the range of movement of the interlocking part 13 can be set to an appropriate range by the elongated hole 13c and the through-hole 3e.

[0064] In this embodiment, the latch 8 does not directly push the movable part 12b of the switch 12, but the interlocking part 13 pushes the movable part 12b. Furthermore, in the closed state, the first holding protrusion 14c of the holding part 14, which is in the restricted position, abuts against the second abutted part 13b of the interlocking part 13, which is in a position where the movable part 12b of the switch 12 is pushed in. This restricts the interlocking part 13 from moving in a direction that does not push in the movable part 12b.

[0065] In the locked state, a gap may exist between the locking portion 9 and the restricting surface 8c of the latch 8. Therefore, the latch 8 may be able to move slightly toward the open position. That is, the latch 8 has a play that allows it to move by the gap. In this embodiment, even if the latch 8 moves toward the open position due to the play, the protrusion amount of the movable portion 12b of the switch 12 does not change unless the interlocking portion 13 moves. The movement of the interlocking portion 13 is restricted by the retaining portion 14. Therefore, even if the latch 8 moves toward the open position due to the play, the protrusion amount of the movable portion 12b of the switch 12 does not change. If the protrusion amount of the movable portion 12b of the switch 12 changes, there is a possibility that the open state will be erroneously detected. However, in this embodiment, even if the latch 8 moves toward the open position due to the play, the movable portion 12b of the switch 12 does not move, so the open state will not be erroneously detected due to the play of the latch 8.

[0066] Furthermore, because the retaining portion 14 is biased by the biasing portion 15 in the direction toward the restricted position, the retaining portion 14 is less likely to deviate from the restricted position. This ensures that the retaining portion 14 is stably positioned in the interlocking portion 13. This ensures that the first retaining protrusion 14c remains in contact with the second abutted portion 13b of the interlocking portion 13. This more reliably prevents the open state from being erroneously detected.

[0067] FIG. 13 is a diagram illustrating a modification of the locking device according to the embodiment. As shown in FIG. 13, the interlocking unit 13 is configured to move parallel to the X-axis. The switch 12 is installed so that the pushing direction of the movable unit 12b is parallel to the X-axis. The retaining unit 14 is configured to move up and down by contacting the second contact unit 8e of the latch 8. Specifically, the second retaining projection 14d is shaped so that the upper end of the YZ plane is tilted toward the positive side of the X-axis. The retaining unit 14 is in the restricting position when positioned downward and in the non-restricting position when positioned upward. Since the retaining unit 14 cannot move under its own weight in this modification, a biasing unit 19 is also provided to bias the retaining unit 14 in the positive direction along the X-axis. However, since the retaining unit 14 can move under its own weight, the biasing unit 15 can be omitted in this modification.

[0068] Even with this configuration, it is possible to prevent the incomplete locking state as described above, and to prevent the interlocking part 13 from moving when the latch 8 rattles, thereby preventing the door from being detected as open. [Explanation of symbols]

[0069] 1 safe 2. Case 2a front 2b opening 3 doors 3c surface 3d back side 3e,3f Penetration part 7 Locking device 8 bolts 8a Convex part 8b Barrel recess 8c Regulatory aspects 8d First contact part 8e Second contact portion 8f Top 9 Locking section 10 Solenoid 11 Link mechanism 12 Switch 12a main body 12b Moving part 13 Interlocking part 13a first contact portion 13b second contact portion 13c long hole 14 Holding part 14a long hole 14c First holding protrusion 14d Second retaining protrusion R1 First moving range R2 Second moving range

Claims

1. A locking device for locking a door that closes an opening, a latch that is movable between an open position where the door can be opened and a closed position where the door is restricted from being opened; a locking unit that is movable between a locked position that restricts the movement of the latch from the closed position to the open position and an unlocked position that allows the movement of the latch from the closed position to the open position; an interlocking portion that moves from a first position to a second position in accordance with movement of the latch from the closed position to the open position; a switch that detects whether the door is closed or open based on the position of the interlocking part, The movement range of the latch is divided into a first movement range from the closed position toward the open position and a second movement range that is closer to the open position than the first movement range, a locking device characterized in that the latch is provided with a first abutment portion that does not abut the interlocking portion when the latch is moving through the second range of movement, and that abuts the interlocking portion when the latch is moving through the first range of movement, thereby moving the interlocking portion from the second position to the first position.

2. a stop mechanism that stops the movement of the interlocking part from the first position toward the second position when the latch reaches a boundary between the first movement range and the second movement range, 2. The locking device according to claim 1, wherein the position at which the interlocking portion is stopped by the stopping mechanism is the second position.

3. the stop mechanism has an elongated hole formed in the interlocking portion so as to extend along the movement direction of the interlocking portion, and a through-portion that passes through the elongated hole, The locking device according to claim 2, wherein the movement of the interlocking part is stopped by the through part coming into contact with the inside of the elongated hole.

4. a holding portion that is movable between a restricting position where it contacts the interlocking portion at the first position to restrict movement of the interlocking portion, and a non-restricting position where it separates from the interlocking portion at the first position to allow movement of the interlocking portion; 2. The locking device according to claim 1, wherein the retaining portion in the restricting position moves to the non-restricting position after the latch has moved a certain distance from the closed position toward the open position.

5. a biasing portion that biases the holding portion in a direction from the non-restricted position toward the restricted position, 5. The locking device according to claim 4, wherein the latch is provided with a second abutment portion that abuts against the retaining portion to move the latch to the non-restricted position after the latch has moved a certain distance from the closed position toward the open position.

6. A box body having an opening on one side; a door that closes the opening; A safe comprising: a locking device according to any one of claims 1 to 5, which is provided on the door.

Images