Door structure and apparatus

Abstract

To provide a door structure and a device capable of preventing a failure (for example, part deformation and half lock) caused by an erroneous operation of closing a door in a state of removing a key.SOLUTION: The door structure includes a body part 11, an inner door 13 rotatable around a shaft part 14 provided on the body part 11, a lock part provided on the inner door 13 and having a cylinder 22 rotatable in a state where a key is inserted, a restriction mechanism 30 interlocked with an unlocking operation for rotating the key from a locked position to an unlocked position and an operation opposite to the unlocking operation, and for allowing and restricting the opening operation of the inner door 13, a biasing part 41 for applying biasing force in a direction where the key returns to the locked position when the inner door 13 is opened, and a key insertion state holding mechanism 60 for holding a state where the key is inserted into the lock part when the inner door 13 is opened.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a door structure and device. [Background technology]

[0002] Currently, devices for transacting media (one example is banknotes) include, for example, cash registers installed in retail stores, change dispensers and deposit / dispense machines, automated teller machines (ATMs) installed in financial institutions, ticket dispensers installed in train stations, etc. These devices are equipped with a media processing device (one example is a banknote unit) that processes the media.

[0003] One type of media processing device is equipped with a removable banknote cassette (also called a collection cassette) (see Patent Document 1). The collection cassette described in Patent Document 1 has a collection box and a reject box, and has a double door structure with an outer door and an inner door. When the outer door is open, only the reject box is accessible, and when the inner door is open, the collection box is also accessible. The outer door is equipped with a lock.

[0004] There are also collection cassettes that have a lock on the inner door. An example of such a collection cassette is shown in Figures 9 and 10. Figure 9 is a perspective view of a conventional collection cassette. Figure 10 is a vertical cross-sectional view of the conventional collection cassette, corresponding to XX in Figure 9.

[0005] The collection cassette 905 shown in Figure 9 is arranged in front of the banknote unit of the change machine and is detachable from the device main body. The interior of the collection cassette 905 is divided into two spaces, upper and lower. The upper space is a reject box 905a that stores rejected banknotes such as damaged notes. The lower space is a collection box 905b that stores banknotes when they are collected from a storage box provided in the change machine main body.

[0006] The collection cassette 905 has a double door structure consisting of an outer door 912 and an inner door 913. The reject box 905a can be accessed by opening the outer door 912. Furthermore, the collection box 905b can be accessed by opening the inner door 913, allowing the banknotes inside to be removed. The outer door 912 and the inner door 913 are supported on the main body 911 by a coaxial shaft 914. The outer door 912 and the inner door 913 can rotate in the α1 direction and the α2 direction around the shaft 914.

[0007] The outer door 912 is structured so that it can be opened and closed without a key. For example, when the outer door 912 is closed, it is fixed to the main body 911 by a locking mechanism (not shown). The inner door 913 is provided with a Domlock lock 921, and a mechanism as shown in Fig. 10 is provided on the inside of the inner door 913. The Domlock lock 921 does not have an auto-lock mechanism (the lock is unlocked by turning the key, but the door is locked when closed even if the key is not inserted), so the inner door 913 must be opened or closed with the key inserted.

[0008] (Operation when unlocking the inner door) The operation of unlocking the inner door 913 will be described with reference to FIGS. 10 and 11. FIG. 11 is a longitudinal cross-sectional view of a conventional collection cassette 905, showing the unlocked state. As shown in FIG. 10, when the inner door 913 is locked, opening of the inner door 913 is restricted at two locations, designated by reference numerals 981 and 982. At the first locking point 981, a key plate 931 fixed to the cylinder 922 of the DOM lock 921 interferes with a fulcrum shaft 952, which serves as a fulcrum for vertically moving the rear end of the reject stage 951, which constitutes the bottom of the reject storage 905a. The key plate 931 has a first engaging portion 931a that engages with the fulcrum shaft 952 at the first locking point 981. At the second locking point 982, a lock lever 932 that operates in conjunction with the key plate 931 interferes with a wall portion 911a of the main body 911. 10(b), the lock lever 932 is inserted into a groove 911b formed in the wall 911a at the second locking position 982. The lock lever 932 has a first engaging portion 932a that engages with the groove 911b formed in the wall 911a at the second locking position 982.

[0009] In the state shown in FIG. 10, when a key is inserted into the Domlock lock 921 and turned in the unlocking direction, the cylinder 922 of the Domlock lock 921 and the key plate 931 fixed to the cylinder 922 rotate in the β1 direction. This disengages the first engagement portion 931a from the fulcrum shaft 952, unlocking the first locking location 981. The key plate 931 also has a second engagement portion 931b that engages with the lock lever 932 during the unlocking operation. The rotated key plate 931 pushes the second engagement portion 932b of the lock lever 932 in the γ1 direction (leftward), unlocking the second locking location 982. The unlocked state of the inner door 913 is shown in FIG. 11. As shown in FIG. 11(b), at the second locking location 982, the first engagement portion 932a of the lock lever 932 is disengaged from the groove 911b formed in the wall portion 911a.

[0010] (Operation when locking the inner door) 10 and 11, the operation of locking the inner door 913 will be described. As shown in FIG. 11, when the inner door 913 is unlocked, the reset spring 941 is stretched and pulls the lock lever 932 in the γ2 direction (to the right). When the key inserted in the Domlock lock 921 is turned in the locking direction in the state shown in FIG. 11, the cylinder 922 of the Domlock lock 921 and the key plate 931 fixed to the cylinder 922 rotate in the β2 direction. As the key plate 931 rotates, the second engagement portion 931b of the key plate 931 separates from the second engagement portion 932b of the lock lever 932 (i.e., the engagement between the second engagement portion 931b and the second engagement portion 932b is released), and the pulling force of the reset spring returns the lock lever 932 in the γ2 direction (to the right). This causes the door to lock at the second lock point 982. Furthermore, when the key is turned to the locked position, the first locking point 981 is locked.

[0011] It should be noted that the inner door 913 can also be locked by pushing the inner door 913 closed while the key is inserted in the Domlock lock 921. The operation of locking the inner door 913 by closing the inner door 913 will be described with reference to Figures 10 and 12. Figure 12 is a vertical cross-sectional view of a conventional collection cassette 905, and shows the operation of locking the inner door 913 by operating it.

[0012] When the inner door 913 is closed with the lock lever 932 moved in the γ2 direction (see FIG. 10), the first engagement portion 932a of the lock lever 932 comes into contact with the tapered guide portion 911c of the wall portion 911a, as shown by the imaginary line in FIG. 12(b). The guide portion 911c is provided in front of the groove portion 911b and is formed continuously from the groove portion 911b. When the inner door 913 is further closed, the lock lever 932 slides in the γ1 direction (leftward) guided by the guide portion 911c as the inner door 913 is closed. When the lock lever 932 slides in the γ1 direction (leftward) by more than a certain amount, the lock lever 932 pushes the key plate 931, causing the key plate 931 to rotate a predetermined amount in the β1 direction, as shown in FIG. 12(a). This causes the key to rotate in the unlocking direction by the same amount as the key plate 931.

[0013] When the lock lever 932 climbs over the guide portion 911c of the wall portion 911a, the pulling force of the reset spring 941 returns the lock lever 932 in the direction γ2 (to the right). As a result, the first engagement portion 932a of the lock lever 932 engages with the groove portion 911b of the wall portion 911a, and the lock is applied at the second locking point 982 (see FIG. 12(b)). In addition, the second engagement portion 932b of the returned lock lever 932 presses the second engagement portion 931b of the key plate 931, causing it to rotate in the direction β2. As a result, the key is turned in the locking direction and, when turned to the locked position, the lock is applied at the first locking point 981. [Prior art documents] [Patent documents]

[0014] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-088860 Summary of the Invention [Problem to be solved by the invention]

[0015] As mentioned above, in addition to operating the key, the conventional collection cassette 905 can also lock the inner door 913 by pushing the inner door 913 closed while the key is inserted in the Domlock lock 921. When locking the inner door 913, it is well known that the procedure is to close the inner door 913 with the key still inserted, lock it, and then remove the key. However, there have been cases where people have removed the key before closing the inner door 913 due to being unfamiliar with the operation, resulting in the inner door 913 being closed without the key being inserted in the Domlock lock 921.

[0016] With reference to Figure 13, we will explain what happens when the inner door 913 is forcibly closed due to an erroneous operation. In the erroneous operation of closing the inner door 913 with the key removed, as shown in Figure 13(b), the lock lever 932 is pushed in the γ1 direction (leftward) while being deformed by the guide portion 911c. When the lock lever 932 is pushed in the γ1 direction (leftward), as shown in Figure 13(a), the lock lever 932 pushes the key plate 931, and the key plate 931 rotates by the amount of play in the cylinder 922. Because it cannot rotate beyond the amount of play in the cylinder 922, the lock lever 932 remains stretched and cannot move.

[0017] The cylinder 922 of the Domlock lock 921 has some rotational play even when no key is inserted. As shown in Figure 13(c), once this play has been reached, the pin that moves to fit the key ridge inside the cylinder 922 stops moving, making it impossible to insert or remove the key. As a result, when the cylinder 922 is in a rotational play state, it enters a range where the key cannot be inserted or removed, making it impossible to insert the key. In other words, the cylinder 922 is fixed at an angle where the key cannot be inserted.

[0018] In summary, there is a problem in that the following malfunctions occur when the inner door 913 is closed by mistake while the key is removed. Deformation of lock lever 932 (bar) The lock lever 932 is in a half-locked state, where it is stuck at a position other than the normal lock position. The lock lever 932 causes the cylinder 922 of the Domlock lock 921 to rotate with play, making it impossible to insert the key.

[0019] The present invention has been made in consideration of the above-mentioned problems, and provides a door structure and device that can prevent malfunctions (for example, deformation of parts or half-locking) that occur due to the incorrect operation of closing the door with the key removed. [Means for solving the problem]

[0020] In order to solve the above problem, a door structure according to one embodiment of the present invention comprises a main body, a door that can rotate around an axis provided on the main body, a locking section provided on the door and having a cylinder that can rotate with a key inserted, a regulating mechanism that is linked to an unlocking operation that rotates the key from a locked position to an unlocked position and a locking operation that is the opposite operation to the unlocking operation, and that allows and regulates the opening operation of the door, a biasing section that applies a biasing force in the direction of returning the key to the locked position via the regulating mechanism when the door is opened, and a key insertion state retention mechanism that keeps the key inserted in the locking section when the door is opened.

[0021] In order to solve the above problem, an apparatus according to one aspect of the present invention is an apparatus including the door structure described above. [Effects of the Invention]

[0022] According to the present invention, it is possible to prevent malfunctions (for example, deformation of parts or half-locking) caused by erroneous operation of closing the door with the key removed. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a perspective view of a media processing device according to each embodiment of the present invention. [Figure 2] FIG. 1 is a perspective view of a collection cassette according to a first embodiment of the present invention. [Figure 3]FIG. 3 is a longitudinal sectional view of the collection cassette according to the first embodiment of the present invention, corresponding to the line III-III in FIG. 1. [Figure 4] 4 is a longitudinal sectional view of the collection cassette according to the first embodiment of the present invention, corresponding to the IV-IV line in FIG. 2. FIG. [Figure 5A] 1 is an enlarged cross-sectional view of a main part of a collection cassette according to a first embodiment of the present invention, showing a state in which an inner door is closed. FIG. [Figure 5B] FIG. 2 is an enlarged cross-sectional view of a main part of the collection cassette according to the first embodiment of the present invention, showing a state in which the inner door is open. [Figure 5C] 5B is an enlarged cross-sectional view of a main part of the collection cassette according to the first embodiment of the present invention, showing a state in which rotation of the key plate is prevented by a key plate stopper (a view from above of the state of FIG. 5B). FIG. [Figure 6] FIG. 10 is an enlarged perspective view of a main part of a collection cassette according to a second embodiment of the present invention. [Figure 7] 7 is an enlarged cross-sectional view of a main part of a collection cassette according to a second embodiment of the present invention, corresponding to VII-VII in FIG. 6. FIG. [Figure 8] FIG. 10 is an enlarged cross-sectional view of a main part of a collection cassette according to a third embodiment of the present invention. [Figure 9] FIG. 1 is a perspective view of a conventional collection cassette. [Figure 10] 10 is a longitudinal cross-sectional view of a conventional collection cassette, corresponding to XX in FIG. 9. [Figure 11] 1 is a longitudinal cross-sectional view of a conventional collection cassette, showing the cassette in an unlocked state. [Figure 12] 1 is a longitudinal sectional view of a conventional collection cassette, showing the operation of locking by operating the inner door. [Figure 13] 1 is a longitudinal cross-sectional view of a conventional collection cassette, showing the operation when the inner door is forcibly closed due to an erroneous operation. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Each drawing is merely a schematic illustration to allow a sufficient understanding of the present invention. Therefore, the present invention is not limited to the illustrated examples. Furthermore, in the drawings, the dimensions of components constituting the present invention may be exaggerated or reduced in size for clarity of explanation. In addition, in each drawing, common or similar components are denoted by the same reference numerals, and redundant explanations thereof may be omitted.

[0025] [Outline of the embodiment] The collection cassettes 5, 105, 205 (see FIG. 1) according to the first to third embodiments (sometimes referred to as "embodiments") described below are installed in a media processing device that processes media (e.g., paper sheets such as banknotes and tickets) and collect the media within the device. As shown in FIG. 1, in each embodiment, the media processing device 1 equipped with the collection cassettes 5, 105, 205 is assumed to be a banknote unit that processes banknotes.

[0026] FIG. 1 is a perspective view of a media processing device 1 according to each embodiment. The directions of "up and down," "left and right," and "front and back" in the media processing device 1 are indicated by arrows in FIG. 1. These directions are defined for the sake of convenience and do not limit the present invention. The media processing device 1 shown in FIG. 1 is used, for example, with a coin unit to form a change dispenser. The media processing device 1 is also used with a point-of-sale (POS) terminal and a coin unit to form a cash register that is installed at a store's checkout counter and processes merchandise.

[0027] As shown in FIG. 1, the media processing device 1 mainly comprises a deposit unit 2 and a transport unit 3. The deposit unit 2 has an inlet 2a through which banknotes are inserted and ejected, and mainly performs processes related to deposits and withdrawals. The transport unit 3 is disposed adjacent to and behind the deposit unit 2, and transfers banknotes to and from the deposit unit 2. The transport unit 3 has a banknote storage cabinet (not shown), and transports deposited banknotes to the storage cabinet for storage. The deposit unit 2 and the transport unit 3 are covered by a cover 4. The cover 4 is made of, for example, resin.

[0028] Next, an overview of the collection cassettes 5, 105, and 205 according to each embodiment will be described with reference to Fig. 1. The collection cassettes 5, 105, and 205 are mechanisms for collecting banknotes in the transport unit 3, and are detachable from the device main body 1a. A storage space 2b corresponding to the collection cassette 5 is formed in the lower front portion of the deposit unit 2, and the collection cassette 5 is stored in the storage space 2b.

[0029] As will be described in detail later, the collection cassettes 5, 105, and 205 according to the respective embodiments are equipped with key insertion state retention mechanisms 60, 160, and 260, in contrast to the conventional collection cassette 905 (see FIGS. 9 to 12). The key insertion state retention mechanisms 60, 160, and 260 are mechanisms that retain the key inserted in the lock when the door is open. If the rotation of the key can be restricted while the door is open and the cylinder can be kept within the range where the key cannot be inserted or removed (see FIG. 13(c)), the act of "removing the key while the door is open" can be prevented. As a result, the mistake of closing the door with the key removed can be prevented, and part deformation and half-locking can be prevented.

[0030] The key insertion state retention mechanisms 60, 160, and 260 according to the respective embodiments differ primarily in the object whose movement they restrict. The key insertion state retention mechanism 60 according to the first embodiment prevents the rotation of the lock cylinder. The key insertion state retention mechanism 160 according to the second embodiment prevents the sliding of the lock lever. The key insertion state retention mechanism 260 according to the third embodiment prevents the rotation of the key.

[0031] [First embodiment] The configuration of the collection cassette 5 according to the first embodiment will be described with reference to Figs. 2 to 5C (and Fig. 1 as appropriate). Fig. 2 is a perspective view of the collection cassette 5 according to the first embodiment. Fig. 3 is a vertical cross-sectional view of the collection cassette 5 according to the first embodiment, which is a cross-sectional view corresponding to III-III in Fig. 1. Fig. 4 is a vertical cross-sectional view of the collection cassette 5 according to the first embodiment, which is a cross-sectional view corresponding to IV-IV in Fig. 2. Figs. 5A to 5C are enlarged cross-sectional views of a main part of the collection cassette 5 according to the first embodiment.

[0032] As shown in Figures 2 and 3, the interior of the collection cassette 5 is divided into two spaces, an upper space and an lower space. The upper space is a reject storage 5a, which stores rejected banknotes such as unfit notes. The lower space is a collection storage 5b, which stores banknotes when they are collected from a storage storage provided in the device main body 1a. The reject storage 5a and the collection storage 5b are separated by a reject stage 51 (see Figure 3). The reject stage 51 is supported by a fulcrum shaft 52. The reject stage 51 can move up and down around the fulcrum shaft 52.

[0033] As shown in Figures 2 and 3, the collection cassette 5 includes a main body 11, an outer door 12, and an inner door 13. This gives the collection cassette 5 a double structure consisting of the outer door 12 and the inner door 13. Opening the outer door 12 allows access to the reject box 5a. Opening the inner door 13 also allows access to the collection box 5b, allowing the banknotes inside to be removed. The outer door 12 and the inner door 13 are supported on the main body 11 by a coaxial shaft 14. The shaft 14 is provided at the lower front of the main body 11 and is arranged in the left-right direction. The outer door 12 and the inner door 13 can rotate around the shaft 14 in the α1 direction and the α2 direction (see Figure 2).

[0034] The outer door 12 is structured so that it can be opened and closed without a key. For example, when the outer door 12 is closed, it is fixed to the main body 11 by a locking mechanism (not shown). As shown in Figure 3, a recess 12a is formed in the lower front part of the outer door 12 for pulling out the collection cassette 5 from the device main body 1a (see Figure 1).

[0035] As shown in FIG. 2, the inner door 13 has a lock 21. The lock 21 can be operated when the outer door 12 is open. The lock 21 has a cylinder 22 that can rotate with a key (not shown) inserted. The lock 21 does not have an auto-lock mechanism (the lock is unlocked by turning the key, but it locks when closing even if the key is not inserted), so the inner door 13 must be opened and closed with the key inserted. As shown in FIG. 4(c), the lock 21 allows the key to be inserted and removed when in the locked position, but is in an unremovable area where the key cannot be inserted or removed at any other angle. The lock 21 is, for example, a Domlock lock.

[0036] As shown in FIG. 4, inside the inner door 13, a restricting mechanism 30, a biasing portion 41, and a key insertion state maintaining mechanism 60 are provided.

[0037] The restriction mechanism 30 is linked to the unlocking operation, which rotates the key from the locked position to the unlocked position, and the locking operation, which is the opposite operation to the unlocking operation, and allows and restricts the opening operation of the inner door 13. The restriction mechanism 30 has a key plate 31 fixed to the cylinder 22, and a lock lever 32 linked to the key plate 31 and moving parallel to the inner door 13. As shown in FIG. 4 , the key plate 31 is disposed so as to pass through a rib formed on the inner door 13.

[0038] 4, when the inner door 13 is locked, the restriction mechanism 30 restricts the opening of the inner door 13 at two locations indicated by the reference numerals 81 and 82. At the first locking location 81, the key plate 31 interferes with the fulcrum shaft 52. At the second locking location 82, the locking lever 32 interferes with the wall 11a of the main body 11.

[0039] As shown in Figure 4(b), at the second locking point 82, the locking lever 32 is inserted into a groove 11b formed in the wall 11a. A tapered guide portion 11c is provided in front of the groove 11b. The guide portion 11c is formed continuously from the groove 11b, and when the inner door 13 is closed, the locking lever 32 comes into contact with and is guided by the guide portion 11c.

[0040] The key plate 31 has a first engagement portion 31a and a second engagement portion 31b. The first engagement portion 31a engages with the fulcrum shaft 52 at a first locking point 81. The second engagement portion 31b engages with the lock lever 32 during an unlocking operation.

[0041] The lock lever 32 has a first engagement portion 32a and a second engagement portion 32b. The first engagement portion 32a engages with a groove portion 11b formed in the wall portion 11a at the second locking point 82. The second engagement portion 32b engages with the key plate 31 during the unlocking operation.

[0042] 4 applies a biasing force via the restriction mechanism 30 in a direction that returns the key to the locked position when the inner door 13 is opened. The biasing part 41 is, for example, a tension spring. When the inner door 13 is unlocked, the biasing part 41 is in an extended state and pulls the lock lever 32 in the γ2 direction (to the right).

[0043] The key insertion state retention mechanism 60 shown in Figure 4 is a mechanism that retains the key inserted in the lock 21 when the inner door 13 is open. In this embodiment, the key insertion state retention mechanism 60 is composed of a key plate stopper 61 and a fulcrum shaft 52. The key plate stopper 61 is an example of a limiting member. When the inner door 13 is open, the limiting member comes into contact with at least one of the key, the restriction mechanism 30, and the lock 21, and restricts the key from rotating toward the locked position within the insertion and removal prohibition area.

[0044] When the inner door 13 is opened to a certain angle, the key plate stopper 61 interferes with the key plate 31 and prevents the rotation of the key plate 31. The key plate stopper 61 may be, for example, an elastic member, and a leaf spring is assumed here.

[0045] The key plate stopper 61 will be described in more detail with reference to FIGS. 5A to 5C. FIG. 5A shows the inner door 13 in a closed state, and FIG. 5B shows the inner door 13 in a state where it is opened to a certain angle. As shown in FIG. 5A, when the inner door 13 is closed, the key plate stopper 61 is pressed against the fulcrum shaft 52 of the reject stage 51, thereby retracting the key plate 31 from its movable range. When the inner door 13 is opened, the key plate stopper 61 moves away from the fulcrum shaft 52, releasing the key plate stopper 61 from pressing down. The released key plate stopper 61 resiliently moves into the movable range of the key plate 31, preventing the key plate 31 from rotating, preventing the cylinder 22 of the lock 21 from rotating. This prevents the key 29 from being removed when the inner door 13 is open. FIG. 5C is a diagram (a top view of the state of FIG. 5B) showing the state where the key plate 31 is prevented from rotating by the key plate stopper 61.

[0046] It should be noted that the present invention is not limited to the leaf spring exemplified in this embodiment, and other means such as a link mechanism may be used as long as it can prevent the rotation of the key plate 31 depending on whether the inner door 13 is open or closed.

[0047] As described above, in the collection cassette 5 according to the first embodiment, the key insertion state retention mechanism 60 retains the key 29 inserted in the lock 21 when the inner door 13 is open. If the rotation of the key 29 can be restricted and the cylinder 22 can be kept within the range where the key cannot be inserted or removed (see FIG. 4(c)) while the inner door 13 is open, the act of "removing the key while the door is open" can be prevented. As a result, it is possible to prevent malfunctions (such as component deformation or half-lock) that may occur due to the mistake of closing the inner door 13 with the key 29 removed.

[0048] [Second embodiment] The configuration of a collection cassette 105 according to the second embodiment will be described with reference to Fig. 6 and Fig. 7 (and Fig. 1 to Fig. 5C as appropriate). Fig. 6 is an enlarged perspective view of a main part of the collection cassette 105 according to the second embodiment. Fig. 7 is an enlarged cross-sectional view of a main part of the collection cassette 105 according to the second embodiment, which is a cross-sectional view corresponding to VII-VII in Fig. 6.

[0049] As shown in FIG. 6, the collection cassette 105 according to the second embodiment includes a key insertion state retention mechanism 160. The key insertion state retention mechanism 160 prevents the lock lever 132 from sliding. In this embodiment, the key insertion state retention mechanism 160 is composed of a lock lever stopper 161 and the lock lever 132. The lock lever stopper 161 is an example of a limiting member. When the inner door 13 is opened, the limiting member comes into contact with at least one of the key, the restriction mechanism 30, and the locking portion 21, and restricts the key from rotating toward the locked position within the insertion / removal prohibition area.

[0050] When the inner door 13 is opened to a certain angle, the lock lever stopper 161 interferes with the lock lever 132 and prevents the lock lever 132 from sliding. The lock lever stopper 161 of this embodiment is formed on the shaft 14 of the inner door 13 and is a fan-shaped member that extends in the circumferential direction of the shaft 14. The lock lever 132 is formed with a slit 32c into which the lock lever stopper 161 fits.

[0051] The key insertion state retention mechanism 160 will be described in more detail with reference to Figure 7. Figure 7(a) shows the inner door 13 in a closed state, and Figure 7(b) shows the inner door 13 in a state where it is opened at a certain angle. As shown in Figure 7(a), when the inner door 13 is closed, the lock lever stopper 161 is not engaged with the slit 32c of the lock lever 132, allowing the lock lever 132 to slide. As shown in Figure 7(b), when the inner door 13 is open, the lock lever stopper 161 is inserted into the slit 32c of the lock lever 132, preventing the movement of the lock lever 132. This prevents the key 29 from being removed when the inner door 13 is open.

[0052] It should be noted that the lock lever stopper 161 is not limited to the one exemplified in this embodiment, and other means such as a link mechanism or a leaf spring may be used as long as it can prevent the lock lever 132 from sliding depending on the open / closed state of the inner door 13.

[0053] The collection cassette 105 according to the second embodiment described above can also achieve the same effects as those of the first embodiment.

[0054] [Third embodiment] The configuration of the collection cassette 205 according to the third embodiment will be described with reference to Fig. 8 (and Figs. 1 to 7 as appropriate). Fig. 8 is an enlarged cross-sectional view of a main part of the collection cassette 205 according to the third embodiment.

[0055] As shown in FIG. 8 , the collection cassette 205 according to the third embodiment includes a key insertion state retention mechanism 260. The key insertion state retention mechanism 260 prevents the rotation of the key 29. In this embodiment, the key insertion state retention mechanism 260 is composed of a key rotation stopper 261 and the key 29. The key rotation stopper 261 is an example of a limiting member. When the inner door 13 is opened, the limiting member comes into contact with at least one of the key 29, the restriction mechanism 30, and the lock 21, and restricts the key from rotating toward the locked position within the insertion / removal prohibition area.

[0056] When the inner door 13 is opened to a certain angle, the key rotation stopper 261 interferes with the key 29 and prevents the key 29 from rotating. The key rotation stopper 261 of this embodiment is movable in conjunction with the opening and closing of the inner door 13. As shown in FIG. 8(a), the key rotation stopper 261 is out of the movable range of the key 29 when the inner door 13 is closed, and as shown in FIG. 8(b), the key rotation stopper 261 moves into the movable range of the key 29 when the inner door 13 is opened. The key rotation stopper 261 may be, for example, a plate that moves in accordance with the opening and closing of the inner door 13. This prevents the key 29 from being removed when the inner door 13 is open.

[0057] It should be noted that the key rotation stopper 261 is not limited to the one exemplified in this embodiment, and other means such as a fixed object, a link mechanism, or a leaf spring may be used as long as it can prevent the rotation of the key 29 depending on the open / closed state of the inner door 13.

[0058] The collection cassette 205 according to the third embodiment described above can also achieve the same effects as those of the first and second embodiments.

[0059] Although the embodiments of the present invention have been described above, the present invention is not limited to these and can be practiced within the scope of the claims. [Explanation of symbols]

[0060] 1 Media processing device 1a Device body 2 Deposit Unit 2a Inlet 2b Storage space 3 Transport unit 4 Cover 5,105,205 Collection cassettes 5a Reject Warehouse 5b Collection Depot 11 Main body 11a Wall section 11b Groove 11c Guide section 12 Outer door 13 Inner door 14 Shaft 21 Lock 22 cylinders 29 keys 30 Regulatory Mechanisms 31 Key Plate 32,132 Lock lever 32c slit 41 energizing portion 51 Reject Stage 52 Fulcrum shaft 60,160,260 Key insertion status retention mechanism 61 Key plate stopper (restriction member, elastic member) 161 Lock lever stopper (restriction member) 261 Key rotation stopper (restriction member)

Claims

1. a main body; a door that can rotate around a shaft portion provided on the main body portion; a locking unit provided on the door and having a cylinder that can be rotated with a key inserted; a restricting mechanism that is linked to an unlocking operation of rotating the key from a locked position to an unlocked position and a locking operation that is the opposite operation of the unlocking operation, and that allows and restricts the opening operation of the door; a biasing unit that applies a biasing force in a direction in which the key returns to the locked position when the door is opened via the restricting mechanism; and a key insertion state retention mechanism that retains the key inserted in the lock when the door is opened. A door structure characterized by:

2. The lock portion has an insertion / removal-prohibition region in which the key can be inserted and removed when the lock portion is in the locked position, and the key cannot be inserted and removed at any other angle. The key insertion state retention mechanism has a restriction member that restricts the operation of at least one of the restriction mechanism, the key, and the lock when the door is opened, and restricts the rotation of the key toward the locked position within the insertion and removal prohibition area. The door structure according to claim 1 .

3. The regulation mechanism is a key plate fixed to the cylinder; a lock lever that is linked to the key plate and moves parallel to the door, The lock lever has an engagement portion that engages with the main body portion in the locked position. The door structure according to claim 1 .

4. The key insertion state retention mechanism has a key plate stopper that interferes with the key plate and prevents the key plate from rotating when the door is opened. The door structure according to claim 3 .

5. the key plate stopper is an elastic member, When the door is closed, the key plate stopper is out of the movable range of the key plate, and when the door is opened, a part of the key plate stopper moves into the movable range of the key plate due to elastic force. The door structure according to claim 4 .

6. The key insertion state retention mechanism has a lock lever stopper that interferes with the lock lever and prevents the lock lever from sliding when the door is opened. The door structure according to claim 3 .

7. The lock lever stopper is a fan-shaped member formed on the shaft portion of the door and extending in a circumferential direction of the shaft portion, The lock lever has a slit formed therein into which the lock lever stopper fits, When the door is closed, the lock lever stopper is not fitted into the slit of the lock lever, and when the door is opened, the lock lever stopper is fitted into the slit of the lock lever. The door structure according to claim 6 .

8. The key insertion state retention mechanism has a key rotation stopper that interferes with the key and prevents the key from rotating when the door is opened. The door structure according to claim 1 .

9. The key rotation stopper is movable in conjunction with the opening and closing of the door, is out of the movable range of the key when the door is closed, and moves into the movable range of the key when the door is opened. The door structure according to claim 8 .

10. The engagement portion is hidden by the door in the unlocked position and protrudes outward from the door in the locked position, The main body portion is a groove into which the engaging portion is inserted; a guide portion that is formed continuously from the groove portion and that abuts against the engaging portion to guide the engaging portion into the groove portion when the door is closed; The door structure according to claim 3 .

11. An apparatus comprising the door structure according to any one of claims 1 to 10.

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