Lock device for home delivery box

Abstract

To provide a lock device for a home delivery box with lower possibility in operational error by a delivery person and the like allowing good handle for the delivery person and the like and a consignee.SOLUTION: A lock unit 12 is provided with a latch 46 movable between a door closed position and a door opened position, and a latch biasing spring 48 biasing the latch 46 in a direction of the door closed position. A first operational member 50 having a knob part 64 and a movable part 64 rotating in conjunction with motion of the knob part 64 is biased so as to be held at an initial position with the latch biasing spring 48. The lock unit comprises a second operational member 52 movable between a lock position and a lock release position, in which an engaging part 70b for lock is provided projecting on a surface of a slider part 70 of a body, and a second biasing spring 54 biasing the second operational member 52 in a direction of a lock release position. A lock mechanism 88 is provided to lock so that the second operational member 52 moved to the lock position cannot return to the lock release position.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a locking device that is attached to a delivery box that has a front door that is opened and closed when putting in luggage, etc., and a rear door that is opened and closed when taking out luggage, etc., and relates to a locking device for a delivery box that is used to lock and unlock the front door. [Background technology]

[0002] Conventionally, as disclosed in Patent Document 1, for example, there has been a storage box that includes a storage body with a first door (front door) and a second door (rear door), a first locking mechanism attached to the first door and operated by a delivery person or the like, an unlocking mechanism attached to the inner side of the side of the storage body and performs the operation of releasing the lock set by the first locking mechanism, and a second locking mechanism attached to the second door and operated by the consignee.

[0003] When this storage box is in a standby state (a state in which it is ready to receive packages), the second locking mechanism is locked, the first locking mechanism is unlocked, and the first door can be opened and closed by anyone. After opening the first door and placing packages or the like into the storage body, a delivery person or the like operates the first door to close and lock it so that a third party other than the recipient cannot open the first door and remove the packages or the like. Specifically, after closing the first door, the delivery person or the like operates the first locking mechanism from the outside of the first door to lock it.

[0004] The consignee unlocks the second locking mechanism, opens the second door, and removes the items inside. When the second door is opened, the unlocking mechanism operates and the lock set by the first locking mechanism is automatically released. When the second door is then closed and locked again, the system returns to the standby state described above.

[0005] This storage box is designed so that the first locking mechanism is automatically unlocked when the second door is opened, and the recipient simply performs the normal operation of "opening the second door, removing the luggage, etc., then closing and locking the second door again," and the box automatically returns to standby mode. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-169587 Summary of the Invention [Problem to be solved by the invention]

[0007] As described above, the storage box of Patent Document 1 is designed so that when a delivery person opens the first door and places a package or the like in the storage body, the delivery person closes the first door and then operates the first locking mechanism from outside the first door to lock it. However, there is a possibility that the delivery person may accidentally operate the first locking mechanism to lock the first door while it is open. In such a situation, there is a problem in that even if the delivery person tries to close the first door, the latch member (550) hits the latch receiving portion (26) of the storage body (20), making it impossible to close the first door.

[0008] The present invention has been made in consideration of the above-mentioned background technology, and aims to provide a locking device for a delivery box that is less likely to be operated incorrectly by delivery companies and is easy to use for both delivery companies and recipients. [Means for solving the problem]

[0009] The invention described in claim 1 is a locking device for a delivery box that is attached to and used in a delivery box that includes a box body having a structure in which the upper and lower ends of a cylindrical body having a front surface, a side surface, a rear surface, and a side surface that are continuous in order and are closed, a front door that is provided on the front surface and is opened and closed when putting luggage or the like into the box body, and a rear door that is provided on the rear surface and is opened and closed when taking the luggage or the like out of the box body, and is used to lock and unlock the front door, a lock unit attached to the front door and a lock release unit attached to the inner surface of one of the side surfaces of the box body, The lock unit includes a latch that can move between a closed door position that prevents the front door from being opened and an open door position that does not prevent the front door from being opened, a latch biasing spring that biases the latch toward the closed door position, a first operating member that has a knob that is rotated by a user and a movable part that rotates in conjunction with the knob, a first biasing spring that biases the movable part so that the knob and the movable part of the first operating member are held in their initial positions, and a second biasing spring that is a member having a lock engagement part protruding from the surface of a slider part that is a main body and that can be operated by a user to move between a locked position and an unlocked position. the locking mechanism is provided with an operating member, a second biasing spring that biases the second operating member toward the unlocked position, and a locking mechanism that locks the second operating member when the second operating member moves from the unlocked position to the locked position so that the second operating member cannot return to the unlocked position, and is attached to the front door so that, of the above-mentioned components, the knob is located on the outer surface of the front door and the other components are located on the inner surface of the front door; the unlocking unit is a unit that detects the state of the rear door and has a mechanism that releases the locking mechanism when the rear door is opened; A first closed state is defined as a state in which the lock unit and the unlock unit are attached to the box body, the front door and the rear door are closed, the second operating member is held in the unlocked position by the bias of the second biasing spring, the knob portion and the movable portion of the first operating member are held in the initial position by the bias of the first biasing spring, and the latch is held in the closed door position by the bias of the latch biasing spring; When the lock unit and the lock release unit are attached to the box body and the front door and the rear door are closed, and the lock mechanism is operated so that the second operating member is held in the locked position against the bias of the second biasing spring, and the lock engagement portion engages with a specific portion of the movable portion, so that the knob and the movable portion are held in the initial position, and the latch is held in the closed door position by the bias of the latch biasing spring, this state is defined as a second closed state. When the knob is rotated from the first closed state and the movable portion is displaced from the initial position in conjunction with this, the specific portion of the movable portion abuts or slides against a specific portion of the latch, and the latch is pushed by the movable portion to move to the open door position, making it possible to open the door, After the door is opened, when a locking operation is performed to move the second operating member to the locked position with the knob and the movable member returned to the initial positions, the locking mechanism operates to lock the second operating member so that it does not return to the unlocked position, and the locking engagement portion engages with a specific portion of the movable member, locking the movable member and the knob so that they cannot rotate, After the locking operation is performed, when the front door is closed, the second closed state is achieved, When an operation to open the rear door from the second closed state is performed, the lock release unit operates to release the lock of the second operating member by the lock mechanism, and the second operating member is moved to the unlocked position by the bias of the second biasing spring, thereby making the knob portion and the movable portion rotatable. This is a locking device for a delivery box that goes into the first closed state when an operation to close the rear door is performed after an operation to open the rear door is performed.

[0010] The invention described in claim 2 is a locking device for a delivery box that is attached to and used in a delivery box that has a box body having a structure in which the upper and lower ends of a cylindrical body having a front surface, a side surface, a rear surface, and a side surface that are continuous in order and are closed, a front door that is provided on the front surface and is opened and closed when putting luggage or the like into the box body, and a rear door that is provided on the rear surface and is opened and closed when taking the luggage or the like out of the box body, and is used to lock and unlock the front door, a lock unit attached to the front door and a lock release unit attached to the inner surface of one of the side surfaces of the box body, The lock unit includes a latch that is movable between a closed door position that prevents the front door from being opened and an open door position that does not prevent the front door from being opened, a latch biasing spring that biases the latch toward the closed door position, a first operating member that has a knob that is rotated by a user and a movable part that rotates in conjunction with the knob, a first biasing spring that biases the movable part so that the knob and the movable part of the first operating member are held in their initial positions, a second operating member that is a member having a locking engagement part protruding from the surface of a slider part that is a main body and that is operable by a user to move between a locked position and an unlocked position, a second biasing spring that biases the second operating member toward the unlocked position, and a member that has a locking protrusion that protrudes in the thickness direction of the plate-shaped swinging part at one end of the plate-shaped swinging part that is a main body, a trigger having the other end of its moving part pivotally attached to the slider part and swingable back and forth in the thickness direction of the plate-shaped swinging part; a trigger biasing spring that biases the trigger in the direction in which the locking protrusion protrudes; and a stopper member having a locking surface that locks the surface of the plate-shaped swinging part of the trigger biased by the trigger biasing spring or the tip portion of the locking protrusion, wherein the trigger is attached to the front door so that, of the above-mentioned components, the knob is located on the outer surface side of the front door and the other components are located on the inner surface side of the front door, the trigger is attached to the front door so that the plate-shaped swinging part is swingable back and forth and the locking protrusion protrudes rearward, and the second operating member is attached to the front door so that, when the front door is closed, the lock position is located on the side of the side to which the lock release unit is attached and the unlock position is located on the opposite side of the side, The lock release unit comprises a rod having first and second ends, a rod support member that supports the rod movably in the longitudinal direction and is movable between a first position moved toward the first end and a second position moved toward the second end, and a rod biasing spring that biases the rod toward the second position, and the rod support member is used by being fixed to the inner surface of one of the side surfaces of the box body so that the first position is located on the side of the front door and the second position is located on the side of the rear door, a first closed state is defined as a state in which the lock unit and the unlock unit are attached to the box body and the front door and the rear door are closed, the second end of the rod is engaged with the inner surface of the rear door, thereby holding the rod at the first position against the bias of the rod biasing spring, the second operating member is held at the unlocked position by the bias of the second biasing spring, the tip portion of the locking protrusion of the trigger is engaged with the engagement surface of the stopper member by the bias of the trigger biasing spring, thereby holding the trigger at a position where it does not contact the first end of the rod, the knob portion and the movable portion of the first operating member are held at the initial position by the bias of the first biasing spring, and the latch is held at the closed door position by the bias of the latch biasing spring; When a state in which the lock unit and the lock release unit are attached to the box body and the front door and the rear door are closed, the second end of the rod is engaged with the inner surface of the rear door, the rod is held at the first position against the bias of the rod biasing spring, the surface of the plate-shaped swinging part of the trigger is engaged with the first end of the rod by the bias of the trigger biasing spring, and the trigger is held at a position where it does not contact the stopper member, the first end of the rod engages with an engagement corner that is an inner corner of a portion where the plate-shaped swinging part and the locking protrusion intersect, so that the second operating member is held at the locked position against the bias of the second biasing spring, the locking engagement part engages with a specific portion of the movable part, so that the knob part and the movable part are held at the initial position, and the latch is held at the closed door position by the bias of the latch biasing spring is defined as a second closed state, When the knob is rotated from the first closed state and the movable part is displaced from the initial position in conjunction with this, a specific part of the movable part comes into contact with or slides against a specific part of the latch, and the latch is pushed by the movable part to move to the door open position, making it possible to open the door, After the door is opened, when a locking operation is performed to move the second operating member to the locked position with the knob and the movable member returned to the initial positions, the engaging corner of the trigger engages with a specific portion of the stopper member, thereby locking the second operating member so that it does not return to the unlocked position, and the locking engaging portion engages with a specific portion of the movable member, thereby locking the movable member and the knob so that they cannot rotate, When the operation to close the front door is performed after the locking operation has been performed, the surface of the plate-shaped swinging part is pressed by the first end of the rod, causing the trigger to move to a position where it does not contact the stopper member, and the engagement between the engagement corner of the trigger and the stopper member is released, resulting in the second closed state. When an operation to open the rear door is performed from the second closed state, the rod moves to the second position due to the bias of the rod biasing spring, whereby the engagement between the engagement corner of the trigger and the first end of the rod is released and the tip portion of the locking protrusion is engaged with the engagement surface of the stopper member, and the second operating member moves to the unlocked position due to the bias of the second biasing spring, whereby the knob portion and the movable portion become rotatable, This is a locking device for a delivery box in which, when the rear door is opened and then closed, the second end of the rod is pressed against the inner surface of the rear door, causing the rod to move to the first position against the force of the rod biasing spring and enter the first closed state.

[0011] The latch biasing spring may also serve as the first biasing spring, and when the knob and the movable part are displaced from the initial position, a specific portion of the latch abuts or slides against a specific portion of the movable part, and the bias of the latch biasing spring is transmitted to the movable part via the latch, biasing the knob and the movable part in a direction returning to the initial position [Invention according to claim 3]. Also, the first operating member may be a member in which the knob and the movable part are integrally provided [Invention according to claim 4].

[0012] The lock unit is preferably a component disposed on the inner surface of the front door when attached to the front door, and includes an escape operation member having a pressing portion that displaces when pressed by a user in a direction approaching the inner surface of the front door, and an auxiliary movable portion that displaces in conjunction with the pressing portion, such that when the pressing portion is pressed and displaced in a direction approaching the inner surface of the front door from the first or second closed state, and the auxiliary movable portion displaces in conjunction with this, the auxiliary movable portion abuts or slides against a specific portion of the latch, and the latch is pushed by the auxiliary movable portion to move toward the open door position, thereby enabling the door to be opened [Invention of Claim 5]. In this case, the escape operation member may be a component in which the pressing portion and the auxiliary movable portion are integrally provided [Invention of Claim 6]. [Effects of the Invention]

[0013] The locking device for delivery lockers of the present invention is simple, consisting of a locking unit and an unlocking unit, and is highly reliable mechanically and operates reliably. Furthermore, it is easy to use because the recipient automatically returns to the first closed state (a state in which the locking unit can receive packages) simply by performing the normal operation of "opening the rear door, removing packages, etc., and then closing the rear door again." Furthermore, because the locking unit can only be operated with the front door open, the problem of delivery personnel being unable to close the front door due to incorrect operation, as with conventional technology, does not occur.

[0014] Furthermore, by attaching a specified escape operating member, even if a child is temporarily trapped inside the delivery box, the child's natural movements can press the pressing part, ensuring that the front door can be opened, thereby improving safety. [Brief explanation of the drawings]

[0015] [Figure 1] 1A and 1B are perspective views of a delivery box to which an embodiment of the locking device for a delivery box of the present invention is attached, as viewed from the front door side. [Figure 2] 1A and 1B are perspective views of a delivery box equipped with a locking device for a delivery box according to this embodiment, as viewed from the rear door side. [Figure 3] 1A is a front view showing the appearance of the lock unit, and FIG. 1B is a rear view showing the appearance of the lock unit. [Figure 4] 1A is a plan view showing the appearance of the lock unit, and FIG. 1B is a right side view showing the appearance of the lock unit. [Figure 5] (a) is an AA cross-sectional view showing the internal structure of the lock unit, (b) is an AA cross-sectional view showing the structure of the latch, (c) is an AA cross-sectional view showing the structure of the movable part of the first operating member, and (d) is an AA cross-sectional view showing the structure of the slider part of the second operating member. [Figure 6] BB cross-sectional view (a), AA cross-sectional views (b) and (c) show the operation of the lock unit when the knob is rotated. [Figure 7] 10A is a BB cross-sectional view, and FIG. 10B is an AA cross-sectional view showing the operation of the lock unit when a locking operation is performed to move the second operating member to the lock position. [Figure 8] 1A is a cross-sectional view taken along the line CC showing the internal structure of the lock unit, and FIG. 1B is a cross-sectional view taken along the line CC showing the operation of the lock unit when the pressing portion of the escape operation member is pressed. [Figure 9] 10A is a plan view showing the structure of the rod release unit when the rear door is closed, and FIG. 10B is a plan view showing the state when the rear door is open. FIG. [Figure 10] This is a diagram showing the usage and operation of the locking device of this embodiment, and is a schematic diagram showing the state in which the locking device is attached to the delivery box and the front and rear doors are closed [first closed state]. [Figure 11] 11 is a diagram showing the method of use and operation of the locking device of this embodiment, and is a schematic diagram showing the operation from the state of FIG. 10 [first closed state] to the opening of the front door. [Figure 12] 12A to 12C are diagrams showing how to use and operate the locking device of this embodiment, and are schematic diagrams sequentially showing the operation from the state of FIG. 11 to just before the front door is completely closed. [Figure 13]12. FIG. 13 is a diagram showing the method of use and operation of the locking device of this embodiment, and is a schematic diagram showing the state [second closed state] in which the front door is completely closed from the state of FIG. [Figure 14] 14 is a diagram showing the method of use and operation of the locking device of this embodiment, and is a schematic diagram showing the operation when the rear door is opened from the state of FIG. 13 [second closed state]. FIG. [Figure 15] These are figures showing the method of use and operation of the locking device of this embodiment, with (a) a schematic diagram showing the state of the escape operating member in the state of Figure 10 [first closed state], and (b) a schematic diagram showing the operation when the pressing portion of the escape operating member is pressed from this state. [Figure 16] 1 is a block diagram showing the general roles of each component constituting the locking device of this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] <<<<<One embodiment of the lock device of the present invention (lock device 10)>>>> An embodiment of a locking device for a delivery box of the present invention will be described below with reference to the drawings. As shown in Figures 1 and 2, the locking device 10 of this embodiment is composed of a locking unit 12 and an unlocking unit 14, and is attached to a delivery box 16 for use. The delivery box 16 has a box body 26 having a cylindrical structure with a front surface 18, side surfaces 20, rear surface 22, and side surfaces 24 connected in sequence, and a front door 28 that is opened and closed when placing parcels or the like into the storage compartment of the box body 26 is attached to the front surface 18, and a rear door 30 that is opened and closed when removing the parcels or the like is attached to the rear surface 22. Also, as shown in FIG. 10 , the end of the side surface 20 of the box body 26 that is closest to the closed front door 22 is bent inward in a U-shape, and of the two surfaces that are substantially parallel to the front door 28, the surface farther from the front door 28 serves as a latch receiving portion 20a, and the surface closer to the front door 28 serves as a latch driving portion 20b. The latch receiving portion 20a and the latch driving portion 20b will be described later.

[0017] Additionally, delivery box 16 has a mail storage compartment above a storage compartment for packages and the like, which is opened and closed by front door 28 and rear door 30. The front surface 18 of the mail storage compartment is closed by a front wall 34 having a mail slot 34a, and an auxiliary front door 36 is attached to the outside of the front wall 34. An auxiliary rear door 38 is attached to the rear surface 22 of the mail storage compartment.

[0018] The locking device 10 is a device operated by a delivery person or the like, and has a locking unit 12 attached to the front door 28 and an unlocking unit 14 attached to the side surface 20, and is used to lock and unlock the front door 28. A second locking device 32, which is operated by the consignee, is attached to the rear door 30, and the second locking device 32 is used to lock and unlock the rear door 30. The second locking device 32 is not an essential part of the present invention, and a publicly known device can be used.

[0019] <<<Configuration of lock device 10>>> Next, the configurations of the lock unit 12 and the lock release unit 14 that constitute the lock device 10 of this embodiment will be described in order. <<Lock unit 12>> As shown in Figures 3 and 4, the lock unit 12 has a housing 40 that is roughly hexahedral, and the various components that make up the lock unit 12 are housed or attached inside and outside the housing 40.

[0020] <Case 40> The housing 40 is composed of an outer panel member 42 that is disposed on the outer surface side of the front door 18, and a substantially rectangular main body member 44 that has the outer panel member 42 attached to one side and is disposed on the inner surface side of the front door 18. As shown in FIG. 5(a) and other figures, the main body member 44 has a unique structure in which multiple spaces (hereinafter referred to as internal spaces) are provided inside, and for example, the upper and lower ends of the main body member 44 are provided with seal storage sections 44a for storing seals. The housing 40 accommodates or is equipped with a latch 46, a latch biasing spring 48 (a member also serving as a first biasing spring), a first operating member 50, a second operating member 52, a second biasing spring 54, a trigger 56, a trigger biasing spring 58, and an escape operating member 60, and is configured such that a specific portion of the main body member 44 of the housing 40 operates as a stopper member 62. The detailed structure of the housing 40 will be described in the explanation of the configuration of each of the above members.

[0021] <Latch 46, Latch Spring 48, and First Operating Member 50> The latch 46 is a member that displaces between a closed position, which prevents the front door 28 from being opened, and an open position, which does not prevent the front door 26 from being opened, and is disposed in the internal space of the main body member 44, as shown in FIGS. 5( a) and 6(a). Briefly explaining the closed and open door positions, the closed position is a position in which the head portion 46a protrudes outward from the opening of the main body member 44 of the housing 40 and engages with the latch receiver 20a, as shown in FIG. 10 and other figures described later. The open position is a position in which the head portion 46a retracts inside the main body member 44 and does not engage with the latch receiver 20a, as shown in the upper drawing of FIG. 11 and other figures described later. The latch 46 is guided by the inner wall of the main body member 44 and displaces substantially parallel to the front door 28 between the closed and open positions.

[0022] 8(a) and (b), the latch 46 has one corner of the head portion 26a (the corner away from the front door 28) beveled to form a first inclined surface 46b(1), and a second inclined surface 46b(2) of approximately the same angle is provided at a position midway a short distance from the head portion 46a. In addition, as shown in FIG. 5(b), a pair of two cam receiving portions 46c is provided with which a cam portion 66e of a first operating member 50 (described later) abuts or slides.

[0023] As shown in Figure 5(a), the latch biasing spring 48 is a coil spring that biases the latch 46 toward the closed door position, and is attached to the internal space of the main body member 44 of the housing 40 so that one end presses against the end face opposite the head portion 46a of the latch 46, and the other end presses against the inner wall of the main body member 44.

[0024] The first operating member 50 is a member integrally formed with a knob 64, which is rotated by a delivery person or the like, and a movable portion 66, which rotates in conjunction with the knob 64. The movable portion 66 is disposed in the internal space of the main body member 44 of the housing 40, and the knob 64 protrudes outward from an opening in the outer plate member 42. As shown in FIG. 5(c), the movable portion 66 includes a central portion 66a, which is a generally arrow-shaped plate with a central shaft hole, an annular portion 66b provided to surround the periphery of the central portion 66a, and a plurality of connecting portions 66c connecting the annular portion 66b to the central portion 66a. A recess 66d is formed by recessing a specific portion of the annular portion 66b toward the central portion 66a. One surface of the central portion 66a bulges in the thickness direction, and this bulging portion serves as a cam portion 66e. The movable part 66 has a central part 66a attached to a shaft part 68 (a shaft arranged in the thickness direction of the main body member 44) provided on the main body member 44, and is supported so as to be rotatable.

[0025] The knob 64 is erected on the surface of the central portion 66a of the movable portion 66 opposite the cam portion 66e, and when the knob 64 is rotated, the movable portion 66 rotates around the shaft portion 68 in conjunction with this.

[0026] The initial position of the first operating member 50 (the knob 64 and the movable part 66) is the position shown in Fig. 5(a). That is, the biasing force of the latch biasing spring 48 is transmitted to the movable part 66 via the cam receiving part 46c of the latch 46, and the knob 64 and the movable part 66 are held in the initial position. Furthermore, when in the initial position, the recess 66d of the movable part 66 is positioned opposite a locking engagement part 70b of the second operating member 52, which will be described later.

[0027] If this state is considered to be the basic state, when a delivery person or the like rotates the knob 64 in one direction from the basic state, the movable part 66 is displaced from its initial position in response. Then, as shown in FIGS. 6(a) and 6(b), one end of the cam part 66e of the movable part 66 abuts or slides against the cam receiver 46c of the latch 46, the cam receiver 46c is pushed by the cam part 66e, and the latch 46 moves to the door-open position. The same occurs when the knob 64 is rotated in the opposite direction; as shown in FIG. 6(c), the latch 46 moves to the door-open position. Then, when the delivery person or the like releases the knob 64, the latch 46 automatically returns to the basic state due to the bias of the latch bias spring 48.

[0028] <Second operating member 52 and second biasing spring 54> As shown in FIGS. 5(a) and 6(a), the second operating member 52 is a member in which an operating protrusion 70a and a locking engagement portion 70b are protruding from the side surface of a slider portion 70, which is the main body, and the slider portion 70 and the locking engagement portion 70a are disposed in the internal space of the main body member 44 of the housing 40, and the operating protrusion 70a protrudes outward from an opening in the main body member 44. The slider portion 70 is guided by the inner wall of the main body member 44, and is displaced between a locked position and an unlocked position by, for example, having a delivery person or the like slide the operating protrusion 70a. The locked position is the position shown in FIGS. 7(a) and (b), and the unlocked position is the position shown in FIGS. 5(a) and 6(a) to (c).

[0029] The second biasing spring 54 is a coil spring that biases the second operating member 52 toward the unlocked position, and is mounted in the internal space of the main body member 44 of the housing 40 so that one end presses against one surface of the slider portion 70 and the other end presses against the inner wall of the main body member 44.

[0030] The second operating member 52 (slider portion 70, operating convex portion 70a, and locking engagement portion 70b) is in a basic state in which it is in the unlocked position due to the bias of the second biasing spring 54. When a delivery person or the like slides the operating convex portion 70a from this basic state to move the second operating member 52 to the locked position, the locking engagement portion 70b engages with the recessed portion 66d of the movable portion 66 (first operating member 50), as shown in Figures 7(a) and (b), and the movable portion 66 and the knob portion 64 are locked so that they cannot rotate.

[0031] <Trigger 56, trigger biasing spring 58, and stopper member 62> As shown in FIGS. 6( a) and 7(a), the trigger 56 is a member having a locking protrusion 72a that protrudes in the thickness direction of the plate-shaped swinging portion 72 (direction away from the outer plate member 42 of the housing 40) at one end of the plate-shaped swinging portion 72, which is the main body. The plate-shaped swinging portion 72 is disposed in the internal space of the main body member 44 of the housing 40, and the locking protrusion 72a protrudes and retracts through an opening in the main body member 44. The end of the plate-shaped swinging portion 72 opposite the locking protrusion 72a is attached to a shaft 74 (a shaft that is disposed in a direction perpendicular to the shaft 68 that is the rotation axis of the first operating member 50 and perpendicular to the movement direction of the latch 46) provided at the end of the slider portion 70, and is supported so as to be able to swing back and forth in the thickness direction of the plate-shaped swinging portion 72. Hereinafter, the inner corner of the portion where the plate-shaped swinging portion 72 and the locking protrusion 72a intersect will be referred to as an engagement corner 72b.

[0032] The trigger biasing spring 58 is a torsion coil spring that biases the trigger 56 in the direction in which the locking projection 72 a projects, and is attached around the shaft 74 .

[0033] The stopper member 62 is a member having a locking surface 62a that locks the surface of the plate-shaped swinging portion 72 of the trigger 56 or the tip portion of the locking protrusion 72a when the trigger 56 is biased by the trigger biasing spring 58. Here, the surface layer portion of the main body member 44 of the housing 40 on the side opposite to the outer plate member 42 is formed like an outer wall that faces the outer plate member 42, and this outer wall portion serves as the stopper member 62.

[0034] When the second operating member 52 is in the unlocked position, the latch 56 (plate-shaped swinging portion 72 and locking protrusion 72a) is biased by the trigger biasing spring 58, as shown in Figure 6(a), and the tip portion of the locking protrusion 72a is held in a state engaged with the engaging surface 62a of the stopper member 62.

[0035] If this state is considered to be the basic state, when a delivery person or the like slides the operation protrusion 70a from the basic state to move the second operating member 52 to the locked position, as shown in FIG. 7(a), the locking protrusion 72a of the trigger 56 moves to a position where it is not engaged with the locking surface 60a, the surface of the plate-shaped swinging portion 72 is engaged with the locking surface 60a, and the engagement corner 72b engages so as to catch on the end surface of the stopper member 60. Therefore, when the delivery person or the like releases the operation protrusion 70a, the second operating member 52 cannot return to the unlocked position even when biased by the second biasing spring 54. Furthermore, as shown in FIG. 7(b), the locking engagement portion 70b of the second operating member 52 engages with the recess 66d of the movable portion 66, so that the first operating member 50 is also held in a locked state so that the movable portion 66 and the knob portion 64 cannot rotate.

[0036] <Escape operation member 60> The escape operating member 60 is a member that integrally comprises a pressing portion 76 with a plate-like outer shape that displaces toward the outer plate member 42 of the housing 40 when the outer surface is pressed by the user, and an auxiliary movable portion 76a that displaces in conjunction with the pressing portion 76, and the auxiliary movable portion 76a is provided so as to protrude from one end of the pressing portion 76 toward the outer plate member 42. The pressing portion 76 is disposed on the outside of the main body member 44 of the housing 40, and the auxiliary movable portion 76a is disposed in the internal space of the main body member 44. The user in this case is a child or the like who has become trapped inside the box main body 26.

[0037] The escape operating member 60 is supported so that the end of the pressing portion 76 opposite the auxiliary movable portion 76a is attached to an axis portion 78 (an axis arranged perpendicular to the axis portion 68, which is the rotation axis of the first operating member 50) provided on the main body member 44, and is capable of swinging back and forth in the thickness direction of the pressing portion 76.

[0038] As shown in FIG. 8(a), the escape operating member 60 is in a basic state in which the tip of the auxiliary movable portion 76a is engaged with the second inclined surface 46b(2) of the latch 46 and the pressing portion 76 is slightly raised at an angle. When the user presses the pressing portion 76 from this basic state in the direction in which the auxiliary movable portion 76b protrudes, and the auxiliary movable portion 76b is displaced in conjunction with this, as shown in FIG. 8(b), the auxiliary movable portion 76a slides on the second inclined surface 46b(2) of the latch 46, and the latch 46 is pushed by the auxiliary movable portion 76a and moves toward the door-open position. This operation of "the pressing portion 76 is pressed and the latch 46 moves to the door-open position" occurs regardless of whether the second operating member 52 is locked in the locked position or whether the first operating member 50 is locked so as not to rotate.

[0039] <Other> 3, the outer plate member 42 of the housing 40 is provided with an indicator 80 that indicates whether the knob 64 is locked so that it cannot be rotated. The indicator 80 may take any form, and one possible method is to provide the outer plate member 42 with a window that allows the slider 70 inside the main body member 44 to be seen, and color the surface of the slider 70 inside red, so that the red color is visible when the slider 70 is in the locked position, and the red color is not visible (or another color such as green is visible) when the slider 70 is in the unlocked position.

[0040] <<Unlocking unit 14>> As shown in FIGS. 9(a) and 9(b), the unlocking unit 14 is composed of a rod 82, a rod support member 84, and a rod biasing spring 86, and is attached to the inner surface of the side surface 20 of the box body 26 when in use.

[0041] The rod 82 has a first end 82a disposed on the front door 28 side and a second end 82b disposed on the rear door 30 side. The rod support member 84 is a member fixed to the side surface 20 and supports the rod 82 movably in the longitudinal direction, allowing the rod 82 to move between a first position moved in the direction of the first end 82a and a second position moved in the direction of the second end 82b. The rod biasing spring 86 is a coil spring that biases the rod 82 in the direction of the second position.

[0042] The first position is a position where the rod 82 moves toward the first end 82a against the bias of the rod biasing spring 86 as the second end 82b is locked to the inner surface of the closed rear door 30, as shown in FIG. 9(a). Therefore, when the rod 82 is in the first position, the first end 82a is close to the front door 28. The second position is a position where the rear door 30 is opened, the second end 82b is no longer locked, and the rod 82 moves toward the second end 82b under the bias of the rod biasing spring 86 as shown in FIG. 9(b). Therefore, when the rod 82 is in the second position, the first end 82a is slightly away from the front door 28.

[0043] <<<<Usage and Operation of Locking Device 10>>> Next, the method of use and operation of the lock device 10 will be described with reference to FIGS. <<Normal usage and operation>> 10 shows a first closed state, which is one of the states of the locking device 10 when the front door 28 and the rear door 30 are closed. In the locking device 10 in the first closed state, the second end 82b of the rod 82 is engaged with the inner surface of the rear door 30, thereby holding the rod 82 in the first position against the bias of the rod biasing spring 86. The second operating member 52 is held in the unlocked position by the bias of the second biasing spring 54, and the trigger 56 is held in a position where it does not contact the first end 82a of the rod 82, with the tip portion of the locking protrusion 72a engaged with the engagement surface 62a of the stopper member 62 by the bias of the trigger biasing spring 58. The knob portion 64 and the movable portion 66 of the first operating member 50 are held in their initial positions by the bias of the latch biasing spring 48, and the latch 44 is held in the closed door position by the bias of the latch biasing spring 48.

[0044] The first closed state is a state in which the front door 28 and rear door 30 are closed when there is no luggage or the like in the delivery box 16 and anyone can open the front door 28, i.e., a standby state in which luggage or the like can be placed inside at any time.

[0045] When a delivery person or the like places a package or the like in the delivery locker 16, they first rotate the knob 64 from outside the front door 28 to open the closed front door 28. When the knob 64 is rotated from the first closed state of the locking device 10 and the movable part 66 is displaced from its initial position in conjunction with this, as shown in FIGS. 6(a) and 6(b), one end of the cam part 66e of the movable part 66 abuts or slides against the cam receiver 46c of the latch 46, the cam receiver 46c is pressed by the cam part 66e, and the latch 46 moves toward the open door position against the bias of the latch biasing spring 48. As a result, as shown in the upper diagram of FIG. 11, the head part 46a of the latch 46 no longer engages with the latch receiver 20a of the side surface 20, allowing the front door 28 to open.

[0046] After opening front door 28, the delivery person or the like releases knob 64 and places the package or the like into box body 26. Then, they take a seal (not shown) stored in seal storage section 44a and stamp the delivery slip with a receipt seal. When the delivery person or the like releases knob 64, the bias of latch bias spring 48 acts on latch 46 and movable section 66, causing latch 46 to return from the open door position to its original closed door position, and knob 64 and movable section 64 also return to their initial positions.

[0047] Thereafter, before closing the front door 28, the delivery person or the like places their hand on the operating protrusion 70a and performs an operation (locking operation) to move the second operating member 52 to the locked position. When the locking operation is performed in the locking device 10, as shown in Figures 7(a) and 12(a), the engaging corner 72b of the trigger 56 engages with the tip corner of the stopper member 62, thereby locking the second operating member 52 so that it does not return to the unlocked position. Furthermore, the locking engaging part 70b engages with the recess 66d of the movable part 66, thereby locking the movable part 66 and the knob part 64 so that they cannot rotate.

[0048] The delivery person or the like then performs an operation to close the front door 28. At this time, the latch 46 is in the closed door position, and therefore, as shown in FIG. 12(b), the head portion 46a comes into contact with the latch driver 20b on the side surface 20 while closing the front door 28. However, the first inclined surface 46b(1) is pressed by the latch driver 20b, and the latch 46 is displaced toward the open door position against the bias of the latch bias spring 48. As shown in FIG. 12(c), the head portion 46a can overcome the latch driver 20b, and the front door 28 can be closed without hindrance. After the latch 46 overcomes the latch driver 20b and the latch receiver 20a, the latch 46 returns to the closed door position due to the bias of the latch bias spring 48, and assumes the state shown in FIG. 13.

[0049] 13 shows the second closed state of the lock device 10. In this state, the second end 82b of the rod 82 of the lock device 10 is engaged with the inner surface of the rear door 30, and the rod 82 is held in the first position against the bias of the rod biasing spring 86. The trigger 56 is held in a position where it does not contact the stopper member 62 because the surface of the plate-shaped swinging portion 72 is engaged with the first end 82a of the rod 82 due to the bias of the trigger biasing spring 58. The first end 82a of the rod 82 engages with the engagement corner 72b, and the second operating member 52 is held in the locked position against the bias of the second biasing spring 54. The knob portion 64 and the movable portion 66 of the first operating member 50 are held in their initial positions because the lock engaging portion 70b engages with the recess 66d of the movable portion 66, and the latch 46 is held in the closed position due to the bias of the latch biasing spring 48.

[0050] In the second closed state, third parties other than the consignee, who is the owner of delivery box 12, cannot open either front door 28 or rear door 30 from the outside, and cannot remove packages or other items from inside without permission. When the consignee wants to remove packages or other items, he or she unlocks second locking device 32 that locks rear door 30, and then opens rear door 30.

[0051] 14, when the rear door 30 is opened from the second closed state, the rod 82 moves to the second position due to the bias of the rod biasing spring 86, thereby disengaging the engagement corner 72b of the trigger 56 from the first end 82a of the rod 82 and locking the tip of the locking protrusion 72a with the locking surface 62a of the stopper member 62. Then, due to the bias of the second biasing spring 54, the second operating member 52 moves to the unlocked position, and the knob 64 and movable part 66 of the first operating member 50 become rotatable.

[0052] The consignee opens the rear door 30 and takes out the luggage etc. therein, then closes the rear door 30 without operating the locking device 10, and locks the second locking device 32 again.

[0053] When the consignee performs the operation to close the rear door 30, the second end 82b of the rod 82 is pressed against the inner surface of the rear door 30, causing the rod 82 to move to the first position against the force of the rod biasing spring 86, returning the locking device 10 to the first closed state shown in Figure 10.

[0054] <<How to use and what to do when a child is trapped>> In the first closed state (a state in which the door is on standby so that luggage or the like can be placed inside at any time), anyone can easily open the front door 28 by rotating the knob 64 from the outside of the front door 28. Therefore, there is a possibility that a child may open the front door 28 for mischief and get inside, and if the front door 28 is then closed, the locking device 10 will return to the first closed state, and the child will be temporarily trapped inside.

[0055] 15(a) shows the escape operating member 60 in the first closed state. A child trapped inside the box body 26 cannot operate the knob 64 on the outside of the front door 16, so the child tries to push open the front door 28. After repeating this action several times, the child's hand or body comes into contact with the pressing portion 76 of the escape operating member 70, and the pressing portion 76 is pressed and displaced in a direction approaching the front door 28 (toward the outer plate member 42 of the housing 40).

[0056] When the pressing portion 76 is pressed and displaced, and the auxiliary movable portion 76a is displaced in conjunction with this, as shown in the upper drawing of Figure 15(b), the auxiliary movable portion 76a comes into sliding contact with the second inclined surface 46(2) of the latch 46, and the second inclined surface 46b(2) is pressed by the auxiliary movable portion 76a, causing the latch 46 to move toward the open door position, thereby making it possible to open the front door 28. Then, the front door 28 opens due to the force pressing the pressing portion 76, allowing escape.

[0057] Furthermore, if a child operates the second operating member 64 while the front door 28 is open, and closes the front door 28 with the first operating member 50 in the locked state, the child will be trapped in the second closed state. However, even if the child is trapped in the second closed state, the latch 46 is not locked and can be moved, so the child can easily open the front door 28 and escape by performing the same operation as in Figures 15(a) and (b).

[0058] <<<Summary of the lock device 10>>> As described above, the locking device 10 for a delivery locker is composed of the locking unit 12 and the lock release unit 14. As shown in FIG. 16, the roles of the multiple components constituting each unit are clearly divided, resulting in a very simple structure, resulting in high mechanical reliability and reliable operation. Furthermore, the device is easy to use because the recipient or other person automatically returns to the first closed state (a state in which the package can be received) simply by performing the normal operation of "opening the rear door 30, removing the package, etc., and then closing the rear door 30 again." Furthermore, because the locking operation by operating the locking unit 12 can only be performed when the front door 28 is open, the problem of the prior art, in which a delivery person or other person makes a mistake and is unable to close the front door 28, does not occur.

[0059] Furthermore, since the escape operation member 60 is provided, even if a child is temporarily locked inside the delivery box 16, the pressing part 76 is pressed by the child's natural movements, and the front door 28 can be opened reliably, making it extremely safe.

[0060] Additionally, although the front door 28 of the delivery box 16 is a left-hand door, the locking device 10 can be used in the same way even if the front door 28 is a right-hand door. This is because the locking unit 12 has a nearly symmetrical structure in the vertical direction, and the first end 82a and the second end 82a of the rod 82 of the unlocking unit 14 also have nearly the same shape. If the front door 28 is a right-hand door, the same operation can be achieved by attaching the locking unit 12 upside down to the front door 28 and attaching the unlocking unit 14 upside down to the inner surface of the side surface 24 (the side surface opposite the side surface 20). Therefore, one type of locking device can be used for both left-hand and right-hand doors, and the uniformity of the design can be maintained.

[0061] <<<<<Other embodiments and modifications of the locking device of the present invention>>>> The locking device for a delivery box of the present invention is not limited to the above embodiment. For example, in locking device 10, latch biasing spring 28 also serves as a spring (first biasing spring) that biases knob portion 64 and movable portion 6 of first operating member 50 so that they are held in their initial positions, thereby reducing the number of parts. However, if it is difficult to use both springs for the same purpose due to component layout, a dedicated first biasing spring can be provided separately from latch biasing spring 28.

[0062] In explaining the configuration of the locking device 10, we described the first operating member 50 as a member in which the knob 64 and the movable portion 66 are integrally formed. However, the term "integrally formed member" encompasses both "a member formed continuously as one piece" and "a member in which multiple parts are assembled together," which significantly simplifies the structure of each component. However, the first operating member does not necessarily have to be an "integrally formed member" as long as the knob and the movable portion are structured to move in unison. For example, if it is desired to adjust the amount of displacement of the movable portion relative to the amount of displacement of the knob, or to shift the positions of the rotation axes of the knob and the movable portion, they may be structured to move in unison via a separate component such as a gear. This also applies to the pressing portion 76 and auxiliary movable portion 76a of the escape operating member 60.

[0063] The escape operating member may be attached so that the pressing portion receives the force of a trapped child trying to push the door open, and the pressing portion is displaced toward the inner surface of the front door. Therefore, although the escape operating member 60 described above has an attachment structure that rotates the pressing portion 76 about the shaft portion 78, it may also be attached so that, for example, the pressing portion moves in parallel toward the inner surface of the front door. Also, the escape operating member may be omitted if necessary.

[0064] As shown in FIG. 16 , the locking device 10 has a locking mechanism 88 composed of a trigger 56, a trigger biasing spring 56, and a stopper member 62. The locking mechanism 88 has a simple and desirable structure that locks the second operating member 52 so that it cannot return from the unlocked position to the locked position when the second operating member 52 is moved to the locked position. However, the locking mechanism 88 may be replaced with a locking mechanism of a different structure as long as it can perform the same operation. However, when replacing the locking mechanism, it is important to note that the configuration of the unlocking unit 14 must also be changed to match the configuration of the locking mechanism. Furthermore, the unlocking unit is not limited to the configuration of the unlocking unit 14 as long as it detects the state of the rear door and releases the lock set by the locking mechanism when the rear door is opened. The shapes and sizes of the components constituting the locking device are not limited to the configuration of the locking device 10 and can be freely changed as long as the intended effects of the present invention are achieved. In addition, in this application, two of the four sides of the delivery box are referred to as the "front" and "rear," and the "front" door is referred to as the "front door" and the "rear" door is referred to as the "rear door," but these merely represent the relative positional relationship to distinguish between the two sides and the two doors. Therefore, in actual use, the "front" and "front door" may be located at the rear, and the "rear" and "rear door" may be located at the front. [Explanation of symbols]

[0065] 10 Locking Device 12 tablet unit 14 Unlocking unit 16 Delivery Box 18 Front 20,24 Side 20a Latch receiving part 20b Latch drive unit 22 Rear 26 Box body 28 Front door 30 Rear door 40 cabinets 42 Outer panel parts (casing) 44 Main body material (housing) 46 Latch 46a head section 46b(1) First slope 46b(2) Second slope 46c Cam holder 48 Latch biasing spring (first biasing spring) 50 First operating member 52 second operating member 54 Second biasing spring 56 Trigger 58 Trigger bias spring 60 Escape operation member 62 Stopper member 62a Locking surface 64 Knob (first operating member) 66 Movable part (first operating member) 66a central part 66b Annular part 66c Connecting part 66d Recess 66e Cam part 68,74,78 Shaft 70 Slider portion (second operating member) 70a Operation convex part 70b Locking engagement portion 72 Plate-shaped swinging part (trigger) 72a Locking protrusion 72b Engagement corner 76 Pressing portion (escape operation member) 76a Auxiliary moving part 80 Display section 82 Rod (unlocking unit) 82a First end 82b Second end 84 Rod support member (lock release unit) 86 Rod bias spring (unlock unit) 88 Locking mechanism

Claims

1. A locking device is attached to a delivery box that has a box body that is a cylindrical body with a front surface, side surface, rear surface, and side surface that are connected in order and whose upper and lower ends are closed, a front door that is provided on the front surface and that is opened and closed when placing luggage or the like into the box body, and a rear door that is provided on the rear surface and that is opened and closed when removing luggage or the like from the box body, and the locking device for a delivery box that is used to lock and unlock the front door, a lock unit attached to the front door and a lock release unit attached to the inner surface of one of the side surfaces of the box body, The lock unit is a member having a latch that can move between a closed door position that prevents the front door from being opened and an open door position that does not prevent the front door from being opened, a latch biasing spring that biases the latch in the direction of the closed door position, a first operating member having a knob that is rotated by a user and a movable part that rotates in conjunction with the knob, a first biasing spring that biases the movable part so that the knob and the movable part of the first operating member are held in their initial positions, and a lock engagement part that protrudes from the surface of a slider part that is a main body, a second operating member that is operated by a user and can move between a locked position and an unlocked position; a second biasing spring that biases the second operating member toward the unlocked position; and a locking mechanism that locks the second operating member so that it cannot return to the unlocked position when the second operating member moves from the unlocked position to the locked position, and the front door is used by being attached to the front door so that, of the above-mentioned components, the knob is located on the outer surface side of the front door and the other components are located on the inner surface side of the front door, the unlocking unit is a unit including a mechanism that detects the state of the rear door and unlocks the locking mechanism when the rear door is opened, A first closed state is defined as a state in which the lock unit and the unlock unit are attached to the box body, the front door and the rear door are closed, the second operating member is held in the unlocked position by the bias of the second biasing spring, the knob portion and the movable portion of the first operating member are held in the initial position by the bias of the first biasing spring, and the latch is held in the closed door position by the bias of the latch biasing spring; When the second closed state is defined as a state in which the lock unit and the unlock unit are attached to the box body and the front door and the rear door are closed, the lock mechanism operates to hold the second operating member in the locked position against the bias of the second biasing spring, the lock engaging portion engages with a specific portion of the movable portion to hold the knob portion and the movable portion in the initial position, and the latch is held in the closed door position by the bias of the latch biasing spring, When the knob is rotated from the first closed state and the movable part is displaced from the initial position in conjunction with this, a specific part of the movable part comes into contact with or slides against a specific part of the latch, and the latch is pushed by the movable part to move to the door open position, making it possible to open the door, After the door is opened, when a locking operation is performed to move the second operating member to the locked position with the knob and the movable member returned to the initial positions, the locking mechanism operates to lock the second operating member so that it does not return to the unlocked position, and the locking engagement portion engages with a specific portion of the movable member, locking the movable member and the knob so that they cannot rotate, After the locking operation is performed, when the front door is closed, the second closed state is achieved, When an operation to open the rear door is performed from the second closed state, the lock release unit is activated to release the lock of the second operating member by the lock mechanism, When the second operating member is moved to the unlocked position by the bias of the second biasing spring, the knob portion and the movable portion become rotatable, A locking device for a delivery box, characterized in that when an operation to open the rear door is performed and then an operation to close the rear door is performed, the locking device enters the first closed state.

2. A locking device is attached to a delivery box that has a box body that is a cylindrical body with a front surface, side surface, rear surface, and side surface that are connected in order and whose upper and lower ends are closed, a front door that is provided on the front surface and that is opened and closed when placing luggage or the like into the box body, and a rear door that is provided on the rear surface and that is opened and closed when removing luggage or the like from the box body, and the locking device for a delivery box that is used to lock and unlock the front door, a lock unit attached to the front door and a lock release unit attached to the inner surface of one of the side surfaces of the box body, The lock unit includes a latch that is movable between a closed door position that prevents the front door from being opened and an open door position that does not prevent the front door from being opened, a latch biasing spring that biases the latch toward the closed door position, a first operating member that has a knob that is rotated by a user and a movable part that rotates in conjunction with the knob, a first biasing spring that biases the movable part so that the knob and the movable part of the first operating member are held in their initial positions, a second operating member that is a member having a locking engagement part protruding from the surface of a slider part that is a main body and that is operable by a user to move between a locked position and an unlocked position, a second biasing spring that biases the second operating member toward the unlocked position, and a member that has a locking protrusion that protrudes in the thickness direction of the plate-shaped swinging part at one end of the plate-shaped swinging part that is a main body, a trigger having the other end of its moving part pivotally attached to the slider part and swingable back and forth in the thickness direction of the plate-shaped swinging part; a trigger biasing spring that biases the trigger in the direction in which the locking protrusion protrudes; and a stopper member having a locking surface that locks the surface of the plate-shaped swinging part of the trigger biased by the trigger biasing spring or the tip portion of the locking protrusion, wherein the trigger is attached to the front door so that, of the above-mentioned components, the knob is located on the outer surface side of the front door and the other components are located on the inner surface side of the front door, the trigger is attached to the front door so that the plate-shaped swinging part is swingable back and forth and the locking protrusion protrudes rearward, and the second operating member is attached to the front door so that, when the front door is closed, the lock position is located on the side of the side to which the lock release unit is attached and the unlock position is located on the opposite side of the side, The lock release unit comprises a rod having first and second ends, a rod support member that supports the rod movably in the longitudinal direction and is movable between a first position moved toward the first end and a second position moved toward the second end, and a rod biasing spring that biases the rod toward the second position, and the rod support member is used by being fixed to the inner surface of one of the side surfaces of the box body so that the first position is located on the side of the front door and the second position is located on the side of the rear door, a first closed state is defined as a state in which the lock unit and the unlock unit are attached to the box body and the front door and the rear door are closed, the second end of the rod is engaged with the inner surface of the rear door, thereby holding the rod at the first position against the bias of the rod biasing spring, the second operating member is held at the unlocked position by the bias of the second biasing spring, the tip portion of the locking protrusion of the trigger is engaged with the engagement surface of the stopper member by the bias of the trigger biasing spring, thereby holding the trigger at a position where it does not contact the first end of the rod, the knob portion and the movable portion of the first operating member are held at the initial position by the bias of the first biasing spring, and the latch is held at the closed door position by the bias of the latch biasing spring; When a state in which the lock unit and the lock release unit are attached to the box body and the front door and the rear door are closed, the second end of the rod is engaged with the inner surface of the rear door, the rod is held at the first position against the bias of the rod biasing spring, the surface of the plate-shaped swinging part of the trigger is engaged with the first end of the rod by the bias of the trigger biasing spring, and the trigger is held at a position where it does not contact the stopper member, the first end of the rod engages with an engagement corner that is an inner corner of a portion where the plate-shaped swinging part and the locking protrusion intersect, so that the second operating member is held at the locked position against the bias of the second biasing spring, the locking engagement part engages with a specific portion of the movable part, so that the knob part and the movable part are held at the initial position, and the latch is held at the closed door position by the bias of the latch biasing spring is defined as a second closed state, When the knob is rotated from the first closed state and the movable part is displaced from the initial position in conjunction with this, a specific part of the movable part comes into contact with or slides against a specific part of the latch, and the latch is pushed by the movable part to move to the door open position, making it possible to open the door, After the door is opened, when a locking operation is performed to move the second operating member to the locked position with the knob and the movable member returned to the initial positions, the engaging corner of the trigger engages with a specific portion of the stopper member, thereby locking the second operating member so that it does not return to the unlocked position, and the locking engaging portion engages with a specific portion of the movable member, thereby locking the movable member and the knob so that they cannot rotate, When the operation to close the front door is performed after the locking operation has been performed, the surface of the plate-shaped swinging part is pressed by the first end of the rod, causing the trigger to move to a position where it does not contact the stopper member, and the engagement between the engagement corner of the trigger and the stopper member is released, resulting in the second closed state. When an operation to open the rear door is performed from the second closed state, the rod moves to the second position due to the bias of the rod biasing spring, whereby the engagement between the engagement corner of the trigger and the first end of the rod is released and the tip portion of the locking protrusion is engaged with the engagement surface of the stopper member, and the second operating member moves to the unlocked position due to the bias of the second biasing spring, whereby the knob portion and the movable portion become rotatable, A locking device for a delivery box, characterized in that when an operation to open the rear door is performed and then an operation to close the rear door is performed, the second end of the rod is pressed against the inner surface of the rear door, causing the rod to move to the first position against the force of the rod biasing spring and enter the first closed state.

3. A locking device for a delivery box as described in claim 1 or 2, wherein the latch biasing spring also serves as the first biasing spring, and when the knob portion and the movable portion are displaced from the initial position, a specific portion of the latch abuts or slides against a specific portion of the movable portion, and the bias of the latch biasing spring is transmitted to the movable portion via the latch, biasing the knob portion and the movable portion in the direction of returning to the initial position.

4. 3. The locking device for a delivery box according to claim 1, wherein the first operating member is a member in which the knob portion and the movable portion are integrally formed.

5. The locking unit is a component that is positioned on the inner surface of the front door when attached to the front door, and is equipped with an escape operating member that has a pressing portion that displaces when a user presses it in a direction approaching the inner surface of the front door, and an auxiliary movable portion that displaces in conjunction with the pressing portion, and when the pressing portion is pressed in a direction approaching the inner surface of the front door from the first or second closed state and displaces in conjunction with this, the auxiliary movable portion abuts or slides against a specific portion of the latch, and the latch is pushed by the auxiliary movable portion to move toward the open door position, making it possible to open the door. A locking device for a delivery box as described in claim 1 or 2.

6. 6. The locking device for a delivery box according to claim 5, wherein the escape operation member is a member in which the pressing portion and the auxiliary movable portion are integrally provided.

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