CN207568393U - Device for opening/closing door - Google Patents

Abstract

The utility model provides a door opening and closing device which can prevent the body from being caught when the door of the container is closed. The door opening and closing device has: a door, which is arranged to be openable and closable relative to the opening provided on the box; and a notification mechanism that outputs an alarm on the condition that the proximity detection mechanism detects the proximity of the body. The proximity detection unit (proximity detection mechanism) outputs an alarm based on the output of the proximity sensor on the condition that the body is detected approaching the door (door) or opening provided in the box. Therefore, when the door is closed, it is possible to prevent a part of the body from being caught by mistake.

Description

door opening and closing device

technical field

The utility model relates to a door opening and closing device.

Background technique

Conventionally, there is a reading device that reads information stored in an RFID tag (wireless tag). The reading device reads information on the RFID tag by, for example, irradiating radio waves from an antenna provided in the container to RFID-tagged commodities placed inside the container and receiving radio waves reflected from the RFID tag.

When reading the information of the RFID tag stored in the container, in order not to mistakenly read the information of other RFID tags located outside the container, it is necessary to seal the container so that the radio waves irradiated from the antenna do not leak to the outside of the container. . Therefore, the inside of the container is covered with a radio wave absorber, and an openable and closable door for allowing products to enter and exit the container is provided on a part of the container. The user of the reading device opens the door to store the product with the RFID tag in the container, closes the door, and reads the information of the RFID tag by radiating radio waves from the antenna.

That is, when using the reading device, it is necessary to open and close the door of the container. Therefore, when a person who opens and closes the door and a person located around the reading device closes the door, body parts such as fingers may be caught by the door.

Utility model content

The technical problem to be solved by the utility model is to provide a door opening and closing device that can prevent the body from being caught when the door of the container is closed.

A door opening and closing device according to an embodiment has a door, an approach detection mechanism, and a notification mechanism. The door is provided so as to be openable and closable with respect to an opening provided in the box. The approach detection mechanism is provided at the door or the opening, and detects the approach of the body to the door or the opening. The notification means outputs an alarm on the condition that the approach detection means detects the approach of the body to the door or the opening.

According to the present invention, the proximity detection part (proximity detection mechanism) is based on the output of the proximity sensor, and the proximity notification part (notification mechanism) outputs an alarm on the condition that the body is detected approaching the door (door) or opening provided in the box. . Therefore, when the door is closed, it is possible to prevent a part of the body from being caught by mistake.

Description of drawings

1 is an external perspective view showing the structure of a document reading device according to a first embodiment;

2 is an appearance perspective view showing a general structure of the reading unit, FIG. 2(a) is an appearance perspective view showing a state where the door is opened, and FIG. 2(b) is an appearance perspective view showing a state where the door is closed;

3 is a diagram showing a schematic configuration of an opening and closing detection mechanism;

Fig. 4 is a diagram showing a schematic structure of the box body and the door, Fig. 4(a) is a top view of the box body viewed from the positive side of the Z-axis, and Fig. 4(b) is a top view of the box body viewed from the side of the negative direction of the Y-axis body front view;

5 is a diagram showing a schematic configuration of a proximity sensor used in the document reading device according to the first embodiment;

Fig. 6 is a block diagram showing the hardware structure of the main body part and the reading part;

Fig. 7 is a block diagram showing the functional structure of the main body and the reading unit;

FIG. 8 is a flowchart illustrating an example of the operation of the main body and the reading unit;

9 is a diagram showing a schematic configuration of a proximity sensor used in a document reading device according to a second embodiment, FIG. 9( a ) is a diagram showing a cross-sectional structure of the proximity sensor, and FIG. 9( b ) is a plan view of the proximity sensor .

Detailed ways

(first embodiment)

A document reading device as an application example of the door opening and closing device according to the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view showing the configuration of a document reading device 1a according to the first embodiment. The document reading device 1a is a device for reading RFID (Radio Frequency IDentifier) tags T1 attached to documents D1 such as receipts, admission tickets, books, permits, and passports. The document reading device 1a is installed and used on a desk, for example. In addition, FIG. 1 shows an open state in which a door 12 described later of the reading unit 10 is open.

As shown in FIG. 1 , a document reading device 1 a includes a main body 2 and a reading unit 10 including a door opening and closing device according to the present embodiment. The main body part 2 has the display 3b on which the touch panel 3a is arrange|positioned. As the display 3b, for example, a liquid crystal display is used.

The reading unit 10 is a reading/writing device capable of reading information from the RFID tag T1 attached to the document D1, or writing information into the RFID tag T1. In this embodiment, the RFID tag T1 stores information such as a document code for identifying the document D1 with the RFID tag T1 attached thereto.

The reading unit 10 is connected to the main body unit 2 by a cable (not shown) or the like. The reading unit 10 outputs (transmits) various information such as a document code read from the RFID tag T1 to the main body unit 2 by wire or wirelessly. In addition, in this embodiment, the main body part 2 and the reading part 10 have a separate structure, but they are not limited thereto, and may be configured integrally.

In addition, the reading part 10 has a box body 11 and a door 12 (an example of a door part), wherein the box body 11 constitutes the main external device of the reading part 10; It is opened and closed at the opening 13 provided in the box body 11 . The box body 11 has a box-like shape, and has a ratio in which the depth dimension (dimension in the Y direction) is larger than the width dimension (dimension in the X direction) and is long in the depth direction. The case 11 may be provided integrally with the main body 2 , or may be configured to be detachable from the main body 2 . The door 12 is connected to the box body 11 through a hinge portion 14 provided on the right front surface of the box body 11, and opens and closes in the direction of the arrow P with the hinge portion 14 as a supporting shaft.

In addition, in the RFID tag T1, a storage area for writing a registration completion flag described later is prepared. The presence or absence of the registration completion flag is checked by, for example, a gate pulse provided at the entrance of the base plate where the document reading device 1a is installed, and if there is no registration completion flag, a notification mechanism such as a buzzer is used to warn. place.

Hereinafter, the reading unit 10 will be described. FIG. 2 is an external perspective view showing a schematic configuration of the reading unit 10 . FIG. 2( a ) shows an open state in which the door 12 of the reading unit 10 is opened, and FIG. 2( b ) shows a closed state in which the door 12 of the reading unit 10 is closed.

The door 12 opens and closes the opening 13 (storage chamber 19). An opening and closing handle 121 is attached to the door 12 . The user opens and closes the door 12 by holding the opening and closing handle 121 .

The opening 13 has a size capable of passing a plurality of documents D1 at one time. In addition, the box 11 has a storage chamber 19 having a size capable of storing a plurality of documents D1 inside. By opening the door 12 , the user can store the document D1 in the storage chamber 19 through the opening 13 of the box 11 or take out the document D1 from the storage chamber 19 . In addition, the document D1 may be stored in the storage room 19 in a state of being stored in a storage container formed of an insulating (radio wave transparent) member such as wood or glass.

In the storage room 19 , the document D1 is placed on the loading surface 15 serving as the bottom surface of the storage room 19 . The mounting surface 15 is made of an insulating (radio wave transparent) plate member such as wood or glass, and is supported with a predetermined gap from the bottom surface 18 of the case 11 . In addition, the inner wall surface of the box 11 in the storage chamber 19 other than the loading surface 15 includes the wall surface of the storage chamber 19 side of the door 12, and is formed of a member (radio wave reflection material) that reflects radio waves. Known and commonly used radio wave reflective materials such as metals, mold materials, and ferrite can be used for this part.

In the space between the mounting surface 15 and the bottom surface 18 of the housing 11, a planar RFID antenna 16, a circuit board not shown, etc. are provided. The RFID antenna 16 communicates with the RFID tags T1 present in the storage room 19 , that is, the RFID tags T1 attached to each document D1 stored in the storage room 19 , by emitting radio waves such as UHF bands. In addition, the RFID antenna 16 emits radio waves when the door 12 is in the closed state by cooperating with the read/write unit 41 described later.

The outer wall surface of the box body 11 (storage chamber 19) and the door 12 is reflected by radio waves in order to prevent leakage of radio waves in the box body 11 (storage room 19) to the outside and intrusion of external radio waves into the box body 11 (storage room 19). material or a component that absorbs radio waves (radio wave absorbing material). Known and commonly used radio wave reflective materials or radio wave absorbing materials such as metal, mold material, ferrite, etc. can be used for this part.

In addition, an opening and closing detection mechanism 20 for detecting the opening and closing state of the door 12 is provided at a portion on the side of the box body 11 that contacts the door 12 when the door 12 is in the closed state, or is close to it. The opening/closing detection mechanism 20 is provided at: in the closed state of the door 12, the position (edge) of the box body 11 that is in contact with the door 12 or close to it, and the position of the door 12 that faces the edge. . Hereinafter, the structure of the opening and closing detection mechanism 20 will be described with reference to FIG. 2( a) and FIG. 3 .

(Explanation of the door opening and closing detection mechanism)

FIG. 3 is a diagram showing a schematic configuration of the opening/closing detection mechanism 20 . Here, FIG. 3 shows a partial cross-sectional view of the opening and closing detection mechanism 20 viewed from the X direction in FIG. 2 . The opening and closing detection mechanism 20, for example, is provided with a switch 21 inside the cover portion 25 provided on the inner wall of the box body 11, wherein the switch 21 has a push switch or a tactile switch, etc., and only performs an ON action while being pressed ( Momentary action) mechanical switch. Furthermore, a hole 23 having a size corresponding to the pressing portion 211 of the switch 21 is provided at a position facing the switch 21 on the case 11 side.

On the other hand, on the wall surface of the door 12 on the side of the box 11, a convex portion 24 is formed at a position facing the hole 23 (switch 21) of the box 11 in the closed state. The convex portion 24 has a smaller diameter than the hole 23 and has a height at which the switch 21 can be operated by pressing the pressing portion 211 of the switch 21 in the closed state of the door 12 .

Since the opening/closing detection mechanism 20 has the above structure, when the door 12 is closed, the protrusion 24 of the door 12 passes through the hole 23 and presses down the pressing part 211, thereby turning on the switch 21 . Also, when the door 12 is opened, the convex portion 24 of the door 12 releases the pressing of the pressing portion 211 to turn off the switch 21 . The switch 21 detects the open/closed state of the door 12 in accordance with ON/OFF switching by the convex portion 24 . In addition, the switch 21 outputs a signal indicating that the door 12 is in the closed state to the main body 2 and the reading unit 10 through the harness 22 on the condition that it is switched from off to on. In addition, the switch 21 outputs a signal indicating that the door 12 is in an open state to the main body 2 and the reading unit 10 through the harness 22 on condition that it is switched from on to off.

In addition, in the above-mentioned structure, radio waves from the RFID antenna 16 may pass through the hole 23 of the housing 11 and leak to the outside of the housing 11 (reader 10). In addition, radio waves outside the box 11 may pass through the hole 23 of the box 11 and enter the inside of the box 11 . In this reading device and other reading devices, such leakage and intrusion of radio waves are the main causes of erroneous reading and malfunction of the RFID tag T1 .

Therefore, the opening/closing detection mechanism 20 of the present embodiment has a shielding portion at the position where the switch 21 is provided, and the shielding portion shields radio waves leaking from the inside of the box 11 to the outside and radio waves intruding from the outside of the box 11 to the inside. .

Specifically, the opening/closing detection mechanism 20 has the above-described cover portion 25 (structural body) that covers the switch 21 and the periphery of the hole 23 as a shielding portion. The cover portion 25 is formed of a radio wave reflecting material or a radio wave absorbing material, and is connected to the inner wall of the case 11 without a gap by screwing or welding.

In addition, a hole 26 through which the wire harness 22 passes is provided in the cover portion 25 . Here, the size of the hole 26 is not particularly limited, and may be, for example, a size corresponding to the diameter of the wire harness 22 . In addition, it is preferable that the gap between the wire harness 22 and the hole 26 be filled with a conductive material having radio wave (electromagnetic) sealing properties. As the conductive material, a metal mesh, a metal foam, or the like can be used. Thereby, leakage and intrusion of radio waves through the hole 26 can be prevented.

(explanation of the opening and closing mechanism of the door)

Next, the opening and closing mechanism of the door 12 will be described using FIG. 4 . 4 is a diagram showing a schematic structure of the box 11 and the door 12, and FIG. 4(a) is a plan view of the box 11 viewed from the positive side of the Z-axis. FIG.4(b) is a front view which looked at the case 11 from the negative direction side of a Y-axis.

The hinge portion 14 is constituted by, for example, a flat hinge. That is, the hinge part 14 has the fixed side hinge blade 14a, the movable side hinge blade 14b, the fixed side shaft cylinder 14c, the movable side shaft cylinder 14d, and the shaft part 14e. The fixed side hinge blade 14 a is a hinge blade attached to the case 11 . The movable side hinge blade 14 b is a hinge blade attached to the door 12 . The fixed-side shaft cylinder 14c is a member integrated with the fixed-side hinge blade 14a, and is fixed so as to be able to open and close about a movable-side shaft cylinder 14d and a shaft portion 14e described later. The movable side shaft cylinder 14d and the movable side closing blade 14b are integral members, and are fixed so as to be able to open and close about the above-mentioned fixed side shaft cylinder 14c and the shaft portion 14e as axes. And, as shown in FIG. 4( b ), hinge portions 14 are attached to the upper and lower ends of the door 12 , respectively.

The door 12 is opened and closed with the aforementioned shaft portion 14e as a rotation axis. On the outer peripheral portion of the surface of the box body 11 side of the door 12, a gasket 12a as a sealing member is provided. When the door 12 is closed, the gasket 12a seals the gap between the box body 11 and the door 12, and keeps the opening 13 Airtight state. The gasket 12a is made of an elastic member such as a rubber member, and when the door 12 is closed, the gasket 12a is in contact with the outer peripheral edge of the opening 13 of the case 11 . At this time, the gasket 12a receives the reaction force of the force keeping the door 12 closed from the outer peripheral edge of the opening 13, so the gasket 12a remains in close contact with the outer peripheral edge of the opening 13 of the box 11. Therefore, when the door 12 is closed, the opening 13 remains sealed. In addition, the gasket 12a may be provided on the case 11 side.

In order to smoothly move the door 12 when opening and closing the door 12 , the shaft portion 14 e of the hinge portion 14 is provided at a position where the door 12 does not contact the box 11 when the door 12 is opened and closed. Therefore, a gap 28 is formed between the door 12 and the box body 11 as shown in FIG. 4( b ). Therefore, a person other than the operator of the door 12 may mistakenly insert a part of the body such as a finger into the gap 28 . And, when the operator of the door 12 closes the door 12 without noticing that a part of the body is inserted into the gap 28, the part of the body may be caught between the door 12 and the box body 11.

(Explanation of the structure of the proximity sensor)

The document reading device 1a according to the first embodiment has a proximity sensor 30a for detecting the approach of a human body on the outer edge portion of the door 12 on the side of the hinge portion 14, as shown in FIG. 4(a) and FIG. 4(b). . The proximity sensor 30 a is extended in the vertical direction of the door 12 , and detects a change in capacitance between the door 12 provided with the proximity sensor 30 a and a space in contact with the door 12 . In addition, in the example of Fig. 4, proximity sensor 30a is arranged on the outer surface edge portion of door 12, but as long as proximity sensor 30a can detect the approach of body to gap 28 (Fig. 4(b)), it can be arranged in any place. Set location. That is, the proximity sensor 30a may be provided on the edge of the inner surface of the door 12 . In addition, the proximity sensor 30 a may be provided on an edge portion of the case 11 on the hinge portion 14 side. In addition, currently, touch panels that detect the contact and approach of fingers by detecting changes in electrostatic capacitance are being put into practical use. The proximity sensor 30a is realized using such touch panel technology. Hereinafter, the structure and measurement principle of the proximity sensor 30a will be briefly described.

FIG. 5 is a diagram showing a schematic configuration of the proximity sensor 30a. As shown in FIG. 5, the proximity sensor 30a has, for example, a structure in which a plurality of electrodes 32a, 32b, . A plurality of electrodes 33a, 33b, . . . , 33n are regularly arranged in pairs. That is, for example, the electrode 32a and the electrode 33a are arranged at a predetermined interval. The electrodes 32a, 32b, . . . , 32n are all connected to the wiring 32L. In addition, the electrodes 33a, 33b, . . . , 33n are all connected to the wiring 33L. A predetermined voltage waveform (for example, a rectangular wave) is applied from the input terminal 32 to the wiring 32L. In addition, the wiring 33L is connected to the capacity detection circuit 34 . When detecting a decrease in electrostatic capacitance exceeding a predetermined value, the capacity detection circuit 34 outputs a detection signal indicating the decrease in electrostatic capacitance to the output terminal 33 . In addition, in Fig. 4 (a), Fig. 4 (b), the electrode 32a, 32b, ..., 32n and the electrode 33a, 33b, ..., 33n of the proximity sensor 30a having the base material 31a face the outside of the door 12. set up. In addition, it is preferable that the proximity sensor 30a is provided in the vicinity of the gap 28 as much as possible.

In FIG. 5, two adjacent electrodes, for example, an electrode 32a and an electrode 33a, form a capacitor. And, when a positive voltage is applied to the electrodes 32a, 32b, . At this time, when a part of the body, such as a fingertip F, approaches the electrodes 32b and 33b of the proximity sensor 30a, polarization is generated in the fingertip F induced by static electricity. Also, negative charges are concentrated on the side of the electrode 32b close to the fingertip F. Therefore, a part of the electric force line B going from the electrode 32b to the electrode 33b is attracted by the concentrated negative charge, and changes direction toward the fingertip F. FIG. The smaller the distance between the fingertip F and the electrodes 32b, 33b, the greater the degree to which the lines of electric force B change direction. Like this, when the electric force line B changes direction, the electric force line B toward the electrode 33a, 33b, ..., 33n from the electrode 32a, 32b, ..., 32n reduces, therefore, the electrode 32a, 32b, ..., 32n and the electrode 33a, 33b, ... Among the capacitors formed by 33n, the electrostatic capacity of the capacitor formed by the electrode close to the fingertip F decreases. The capacitance detection circuit 34 detects the approach of the fingertip F by detecting the decrease in the electrostatic capacitance. In addition, for example, when there is no approaching object in the vicinity of the proximity sensor 30a, the capacitance detection circuit 34 compares the capacitance of the capacitors forming the electrodes 32a, 32b, . . . , 32n and the electrodes 33a, 33b, . Capacitance is compared to detect whether a reduction in electrostatic capacitance occurs. At this time, as described above, the surface of the proximity sensor 30a having the electrodes 32a, 32b, . . . , 32n and the electrodes 33a, 33b, . Electrostatic capacitance between the door 12 and the space in contact with the door 12.

The wiring 32L and the wiring 33L shown in FIG. 5 may be buried and arranged inside the base material 31a, or a wiring layer may be formed on the surface of the base material 31a. These wirings 32L and 33L are arranged on the box body 11 side through a wiring passage (not shown) formed inside the aforementioned hinge portion 14 . That is, the input terminal 32, the output terminal 33, and the capacity detection circuit 34 are arranged on the box 11 side. Alternatively, the proximity sensor 30a may be able to detect whether or not a part of the body approaches the gap 28 only when the door 12 is in an open state. Therefore, the proximity sensor 30a operates only when the aforementioned opening/closing detection mechanism 20 ( FIG. 3 ) determines that the door 12 is in the open state.

(Description of the hardware configuration of the reading unit)

Next, the hardware configuration of the reading unit 10 will be described. FIG. 6 is a block diagram showing hardware configurations of the main body unit 2 and the reading unit 10 .

The main body 2 has a computer-configured control unit 50 including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The ROM stores various programs and various data executed by the CPU. The RAM temporarily stores data and programs while the CPU executes various programs.

The touch panel 3 a and the display 3 b are connected to the control unit 50 through various input and output circuits (not shown).

In addition, the storage unit 51, the communication I/F 52, and the like are connected to the control unit 50 through various input and output circuits (not shown).

The storage unit 51 is a storage device including a nonvolatile storage medium such as HDD (Hard Disk Drive) or SSD (Solid State Drive). The storage unit 51 stores various programs and various data related to the operation of the main body unit 2 . In addition, the storage unit 51 stores the document codes read by the reading unit 10 . In addition, the storage unit 51 may also be associated with the file code, and store the file D1 related to the file code and a data table (hereinafter referred to as a table) such as a database that associates the file D1 with information such as the held user. The communication I/F 52 is an interface for transmitting and receiving various data with the reading unit 10 .

On the other hand, the reading unit 10 has a computer-configured control unit 40 including a CPU, a ROM, and a RAM. The ROM stores various programs or various data executed by the CPU. The RAM temporarily stores data and programs while the CPU executes various programs.

In addition, a read/write unit 41, an open/close detection unit 42, a storage unit 43, a proximity sensor 30a, a notification unit 38, a communication I/F 44, and the like are connected to the control unit 40 through various input and output circuits (not shown). .

The read/write unit 41 drives the RFID antenna 16 to transmit modulated waves (radio waves) for reading and writing the RFID tag T1. The read/write unit 41 outputs various information (for example, document codes) read from the RFID tag T1 to the control unit 40 through the RFID antenna 16 . In addition, the reading/writing unit 41 outputs information (for example, flag information, etc.) to be written through the RFID antenna 16, thereby writing the information into the RFID tag T1.

The opening/closing detection part 42 (an example of an opening/closing detection means) is the switch 21 which detects the opening and closing state of the door 12, for example. The operation of the switch 21 is as described above (see FIG. 3 ). The detection result of the opening and closing detection unit 42 is output to the control unit 40 . The storage unit 43 is a storage device including a nonvolatile storage medium such as HDD or SSD. The storage unit 43 stores various programs and various data related to the operation of the reading unit 10 .

The proximity sensor 30a detects the approach of a body. The notification unit 38 is, for example, a buzzer (not shown). The notification unit 38 outputs an alarm on the condition that the proximity sensor 30a detects the approach of the body. The communication I/F 44 is an interface for transmitting and receiving various data between the main body units 2 . In addition, the control unit 40, the reading and writing unit 41, the storage unit 43, the notification unit 38, and the communication I/F 44 included in the reading unit 10 are mounted on a circuit board (not shown), and housed, for example, in the case 11 ( The space between the mounting surface 15 and the bottom surface 18 of FIG. 2( a )).

(Explanation of the functional structure of the reading unit)

Next, the functional configuration of the document reading device 1a will be described. FIG. 7 is a block diagram showing the functional configurations of the main body unit 2 and the reading unit 10 .

The control unit 50 (CPU) of the main body unit 2 realizes the display control unit 301 , the input accepting unit 302 , the communication control unit 303 , and the file registration unit 304 as functional units by cooperating with programs stored in the storage unit 51 .

The display control unit 301 controls the display 3b to display various screens on the display 3b. For example, the display control unit 301 displays an operation element (hereinafter referred to as a read start button) for instructing the start of reading the document code (RFID tag T1) and an operation element (hereinafter referred to as the read start button) for instructing the end of reading. is the screen of the read end button). In addition, when a data table is stored in the storage unit 51, the display control unit 301 may read information corresponding to the document code transmitted from the reading unit 10 from the data table, and display the information on the display 3b.

The input accepting unit 302 accepts an operation input through the touch panel 3a. For example, when an operation element is operated (touch operation) on the operation screen displayed on the display 3 b , the input accepting unit 302 outputs instruction information corresponding to the operation element to the control unit 50 .

The communication control unit 303 controls the communication I/F 52 and transmits and receives various information to and from the reading unit 10 through the communication I/F 52 . For example, when the reading start button is operated, the communication control unit 303 transmits instruction information instructing the reading start to the reading unit 10 . In addition, the communication control unit 303 receives the document code transmitted from the reading unit 10 . Also, when the reading end button is operated, the communication control unit 303 transmits instruction information instructing the reading end to the reading unit 10 . Also, when the document registration by the document registration unit 304 is completed, the communication control unit 303 transmits instruction information indicating that the registration is completed to the reading unit 10 .

The document registration unit 304 stores the document code transmitted from the reading unit 10 in a predetermined area of the storage unit 51 to register it as a document code that has already been read. Specifically, the document registration unit 304 stores the document code received by the communication control unit 303 in a storage area for registration (for example, a database, etc.) together with the date and time of the reception. In addition, the storage area for registration may be in the form of an external device capable of communicating with the main body 2 .

On the other hand, the control unit 40 (CPU) of the reading unit 10 cooperates with the program stored in the storage unit 43 to realize the opening and closing state acquisition unit 401, the read/write control unit 402, and the proximity detection unit 403 (one of the proximity detection mechanisms). example), the proximity notification unit 404 (an example of a notification mechanism), and the communication control unit 405 serve as functional units.

The opening and closing state acquisition unit 401 cooperates with the opening and closing detection unit 42 to acquire opening and closing state information indicating whether the door 12 is in the open state or in the closed state. Specifically, the open/close state acquisition unit 401 determines that the door 12 is in the closed state on the condition that the protrusion 24 (see FIG. 3 ) of the door 12 is detected to press the push portion 211 of the switch 21 .

The read/write control unit 402 controls the read/write unit 41 to read from and write to the RFID tag T1 attached to the document D1. Specifically, when the reading start is instructed from the main body 2 and the open/close state information acquired by the open/close state acquiring unit 401 indicates the closed state of the door 12 , the read/write control unit 402 starts reading.

In addition, the read/write control unit 402 ends the read by the read/write unit 41 when the end of reading is instructed from the main body unit 2 . Then, when the completion of the registration is instructed from the main body 2 , the read/write control unit 402 controls the read/write unit 41 to start writing the registration completion flag. Here, the registration completion flag is information indicating that the file registration is completed, and is written in a predetermined storage area included in the RFID tag T1.

In addition, when the door 12 is in the open state between the start of reading the RFID tag T1 and the writing of the registration completion flag, the read/write control unit 402 ends the reading and executes a reset process for resetting the currently read file code. By this reset process, the file code sent (registered) to the main body 2 is also reset. Then, when it is confirmed that the door 12 is closed again, the read/write control unit 402 reads the RFID tag T1 again.

Accordingly, before the writing of the registration completion flag, when the document D1 whose RFID tag T1 has been read is taken out of the storage room 19, or the document D1 whose RFID tag T1 is not read is added to the storage room 19 Even in this case, the document D1 in the storage room 19 can be reliably read. Alternatively, by notifying the main body 2 that the door 12 is in the open state, a screen notifying that the door 12 is in the open state may be displayed on the display 3 b of the main body 2 .

The approach detection unit 403 detects the approach of the body to the gap 28 ( FIG. 4( b )) by monitoring the output of the proximity sensor 30 a. In addition, the approach detection unit 403 sends to the control unit 40 the fact that the approach of the body is detected.

The proximity notifying unit 404 drives the notifying unit 38 in response to an instruction from the control unit 40 which has received information that the approach of the body has been detected. That is, the proximity notifying unit 404 sounds the buzzer provided as the notifying unit 38 on the condition that the approach of the body to the gap 28 is detected.

The communication control unit 405 controls the communication I/F 44 and transmits and receives various information to and from the main body 2 through the communication I/F 44 . For example, the communication control unit 405 receives instruction information instructing the start of reading transmitted from the main body unit 2 . In addition, the communication control unit 405 transmits the file code read by the read/write control unit 402 from the RFID tag T1 to the main body unit 2 . In addition, the communication control unit 405 receives instruction information indicating the end of reading transmitted from the main body unit 2 . In addition, the communication control unit 405 receives instruction information indicating completion of registration transmitted from the main body unit 2 .

(Description of the flow of processing performed by the reading unit)

Next, the operation of the document reading device 1a will be described. FIG. 8 is a flowchart illustrating an example of operations of the main body unit 2 and the reading unit 10 . A user who uses the document reading device 1 a opens the door 12 of the reading unit 10 and stores the document D1 in the storage chamber 19 . Next, the user operates the reading start button displayed on the display 3 b of the main body 2 to start this process.

In the main body unit 2, when the input accepting unit 302 accepts the operation of the reading start button, the communication control unit 303 transmits instruction information instructing the reading start to the reading unit 10 (step S11).

In the reading part 10, when the communication control part 405 receives the instruction information indicating the start of reading, the read-write control part 402 judges whether the door 12 is in the closed state according to the opening and closing state information obtained by the opening and closing state acquisition part 401. (step S21). Here, when it is determined that the door 12 is in the open state (step S21; NO), the read/write control unit 402 proceeds to step S34.

Next, in step S34, the approach detection unit 403 detects an approaching object to the gap 28 (FIG. 4(b)) (step S34). When the approach detecting unit 403 detects an approaching object (step S34; Yes), the approach notifying unit 404 causes the notifying unit 38 to notify (step S35). After that, return to step S34.

In step S34, when the proximity detection unit 403 does not detect an object approaching the gap 28 (step S34; NO), the proximity notification unit 404 cancels the notification being output by the notification unit 38 (step S36). In addition, in step S36 , even if the notifying unit 38 has not notified, the proximity notifying unit 404 outputs a command to cancel the notifying to the notifying unit 38 . After that, go to step S21. That is, the reading unit 10 returns to the detection of the approaching object in step S34 until the door 12 is in the closed state. And, the reading unit 10 is in a standby state until the door 12 is closed. In addition, in step S21, it may also be: when it is determined that the door 12 is open (step S21; No), the read/write control unit 402 cooperates with the display control unit 301 of the main body 2 to display a message prompting the door 12 to be closed. screen.

On the other hand, in step S21, when it is determined that the door 12 is in the closed state (step S21; Yes), the read/write control unit 402 starts reading the RFID tag T1 (step S22). At this time, radio waves from the RFID antenna 16 start to be radiated. Next, the reading/writing unit 41 judges whether or not the document code has been read from the RFID tag T1 (step S23). Here, when the file code is not read (step S23; No), go to step S25.

On the other hand, in step S23, in the case of reading the file code (step S23; Yes), the communication control part 405 sends the file code to the main body part 2 in sequence (step S24), after which, enters the step S25.

In the next step S25 , the read/write control unit 402 determines whether the door 12 is in the closed state based on the open/close state information acquired by the open/close state obtainment unit 401 . When it is determined that the door 12 is in the open state (step S25; NO), the read/write control unit 402 stops reading of the RFID 10 tag T1 (step S26). In addition, at this time, radiation of radio waves from the RFID antenna 16 is stopped. Then, the read/write control unit 402 performs reset processing (step S27) to reset the file code read so far, and then proceeds to step S34. By this reset process, the document code sent to the main body 2 and registered is also reset.

In addition, in step S25, when it is determined that the door 12 is in the closed state (step S25; YES), the read/write control unit 402 determines whether the end of reading is instructed from the main body unit 2 (step S28). Here, when there is no instruction to end reading (step S28; NO), the process returns to step S23.

In addition, in the case where the reading of the RFID tag T1 is started in an empty state of the storage room 19, in the state of not reading any RFID tag T1, step S23 is continued sequentially; No, step S25; Yes, step S28 ; No loop. In order to avoid such a loop state, in the state of not reading any RFID tag T1, when a predetermined time (for example, 5 seconds) passes, or when the above-mentioned cycle is executed for a predetermined number of times, it can also be forcibly terminated. Reading of RFID tag T1. In addition, in this case, it is desirable that the read/write control unit 402 cooperates with the display control unit 301 of the main body unit 2 to display a message that the RFID tag T1 cannot be read.

In the main body unit 2, when the communication control unit 303 receives the document code from the reading unit 10, the display control unit 301 displays the document code on the display 3b (step S12).

The user operating the main unit 2 refers to the document code displayed on the display 3b, and when confirming that the document codes of all the documents D1 stored in the storage room 19 are displayed, operates the read completion button displayed on the display 3b. Then, when the input accepting unit 302 accepts the operation of the reading end button, the communication control unit 303 transmits instruction information instructing the reading end to the reading unit 10 (step S13).

In the reading unit 10, when the communication control unit 405 receives instruction information instructing the end of reading, the read/write control unit 402 determines that the end of reading is instructed (step S28; YES). Next, the read/write control unit 402 stops radiation of radio waves from the RFID antenna 16, and stops reading of the RFID tag T1 (step S29).

Next, the read-write control unit 402 judges whether or not registration completion has been instructed from the main body unit 2 (step S30). If there is no registration completion instruction (step S30; No), the read/write control unit 402 determines whether the door 12 is in the closed state based on the open/close state information obtained by the open/close state obtainment unit 401 (step S31).

In step S31, when it determines with the door 12 being in a closed state (step S31; Yes), it returns to step S30. In addition, when it is judged that it is in an open state (step S31; No), the read-write control part 402 performs the reset process similar to step S27 (step S32), after that, it progresses to step S34.

In the main body unit 2, the document registration unit 304 performs registration processing based on each displayed document code (step S14). Then, the communication control unit 303 transmits instruction information indicating that the registration is completed to the reading unit 10 (step S15), and ends this process.

In the reading unit 10 , when the communication control unit 405 receives instruction information indicating that the registration is completed, the read/write control unit 402 determines that the registration is instructed to be completed (step S30 ; Yes) 11 . Then, the read-write control unit 402 controls the read-write unit 41 to write a registration completion flag in the RFID tag T1 of each document D1 (step S33), and ends this process.

(second embodiment)

In the first embodiment, the approach detection unit 403 detects the approach of the body based on the change in capacitance detected by the proximity sensor 30a. Furthermore, the approach notifying unit 404 notifies that a part of the body approaches the gap 28 between the door 12 and the box 11 by sounding the buzzer included in the notifying unit 38 . The configurations of the proximity detection unit 403 and the proximity notification unit 404 are not limited to those described in the first embodiment. Hereinafter, as a second embodiment, a document reading device 1b having a proximity detection unit 403 and a proximity notification unit 404 that are different from those of the first embodiment will be described.

In addition, the document reading device 1 b has the same hardware configuration ( FIG. 6 ) and the same functional configuration ( FIG. 7 ) as the document reading device 1 a described in the first embodiment. Furthermore, the document reading device 1b has a proximity sensor 30b ( FIG. 9 ) having a different structure instead of the proximity sensor 30a. Furthermore, the proximity sensor 30 b functions as the proximity detection unit 403 and also functions as the proximity notification unit 404 . Therefore, the description of the hardware configuration and the functional configuration will be omitted, and the same components will be described using the same symbols as those in the first embodiment.

FIG. 9 is a diagram showing a schematic configuration of a proximity sensor 30b used in the document reading device 1b according to the second embodiment. FIG. 9( a ) is a diagram showing a cross-sectional structure of the proximity sensor 30 b, and FIG. 9( b ) is a plan view of the proximity sensor 30 b.

Like the proximity sensor 30a, the proximity sensor 30b has an elongated shape extending in the vertical direction of the door 12, and detects a temperature change in a space in contact with the door 12. The proximity sensor 30b has a structure in which a plurality of pyroelectric sensors for detecting temperature changes are arranged. The pyroelectric sensor is formed of ceramics such as lead zirconate titanate (PZT) or the like. The pyroelectric sensor outputs a signal corresponding to the amount of electric charge generated according to the polarization state due to the pyroelectric effect in which the polarization state of the surface of the sensor changes due to a temperature change. At this time, the amount of generated charge increases or decreases according to the temperature change of the space facing the pyroelectric sensor, so the temperature change of the space can be detected based on the signal output by the pyroelectric sensor. In addition, it is necessary to distinguish between a state where the air temperature of the space facing the door 12 is 36°C and a state where a body with a body temperature of 36°C is approaching. Therefore, it is desirable that the proximity detector 403 judges the approach of the body based on the time change of the output of the proximity sensor 30b.

As shown in FIG. 9( a), the proximity sensor 30b is formed on the surface of a substrate 31b formed of an insulator such as transparent acrylic resin, and a plurality of pyroelectric sensors 35a, 35b, . . . , 35n having the same shape are regularly arranged in a matrix. Configuration structure. The pyroelectric sensors 35a, 35b, . . . , 35n are connected to the wiring 45L and the wiring 46L, respectively. The terminal 36 of the wiring 45L is grounded. Furthermore, the wiring 46L is connected to the temperature detection circuit 39 . The temperature detection circuit 39 outputs a detection signal to the output terminal 37 when detecting a temperature value within a predetermined range indicating the approach of the body based on the output signals of the pyroelectric sensors 35a, 35b, . . . , 35n. In addition, in FIG. 9( a ), the surface 31p of the pyroelectric sensors 35a, 35b, . Also, the proximity sensor 30b is installed as close to the gap 28 as possible.

The proximity sensor 30 b also functions as the proximity notification unit 404 . That is, LED48 is provided in the back surface 31q side of the base material 31b. The back of the LED 48 is covered by a reflective screen 49 . And, the light emitted from the LED 48 enters the inside of the base material 31b from the back surface 31q of the base material 31b.

As shown in FIG. 9( a ), after the incident light reaches the wedge-shaped portion 31s formed on one end side of the base material 31b, the traveling path is bent toward the inside of the base material 31b at the wedge-shaped portion 31s. In addition, the wedge-shaped portion 31 s is configured to reflect all light without transmitting it. The light beam whose travel path is bent travels while repeating all reflections inside the base material 31b. That is, the base material 31b forms a light guide plate. In addition, the surface other than the surface 31p of the base material 31b, that is, the back surface 31q (the surface in which the emitted light of the LED 48 is incident on the inside of the base material 31b) and the end faces 31r and 31t are shielded so that light can travel inside the base material 31b. The light will not leak to the outside.

Most of the light traveling inside the base material 31b travels while repeating total reflection on the surface 31p and the back surface 31q like the light rays R shown in FIG. 9( a ). The surface 31p is a ground glass-like rough surface with high diffusivity. In addition, almost all of the light rays R satisfying the total reflection condition reaching the point P1 on the surface 31p are all reflected at the point P1 and travel to the inside of the base material 31b, but a part of the light rays R is shown in FIG. 9 (a ), diffuses at point P1 and emits to the outside of the substrate 31b. The same phenomenon occurs at all points (for example, point P2) on the surface 31p.

In this way, part of the light emitted from the LED 48 is emitted to the outside from the surface 31p of the base material 31b. Therefore, when the substrate 31b is viewed from the side of the surface 31p on which the pyroelectric sensors 35a, 35b, . . . , 35n are provided, it appears to emit light uniformly. This is the same principle as the so-called backlight lighting that illuminates the liquid crystal display from the back.

The document reading device 1 b notifies that a part of the body is approaching the door 12 by performing such lighting. That is, the proximity sensor 30 b also functions as the proximity notification unit 404 . Therefore, in FIG. 9( a ), the LED 48 is controlled to turn on and off by the output of the temperature detection circuit 39 . That is, when the temperature detection circuit 39 detects the approach of the body, the LED 48 lights up, and when the temperature detection circuit 39 does not detect the approach of the body, the LED 48 goes out.

As described above, according to the document reading device 1a of the first embodiment, the proximity detection unit 403 (proximity detection mechanism) is provided so as to detect that the body is approaching the opening 13 of the housing 11, or is provided so as to be relatively The approach notification unit 404 (notification means) outputs an alarm on the condition that the door 12 (door part) opened and closed by the opening part 13 approaches. Therefore, when the door 12 is closed, it is possible to prevent a part of the body from being caught by mistake.

In addition, according to the document reading device 1 a of the first embodiment, the door 12 and the opening 13 are connected by the hinge 14 . Furthermore, the proximity sensor 30 a constituting the proximity detection unit 403 is provided near the hinge unit 14 . Therefore, it is possible to reliably prevent the body from inadvertently approaching the gap 28 where a part of the body is likely to be caught.

Furthermore, according to the document reading device 1a of the first embodiment, the proximity detection unit 403 detects a change in capacitance between the door 12 and the space in contact with the door 12 based on the output of the proximity sensor 30a. Therefore, the approach of the body to the door 12 can be detected easily and reliably.

Furthermore, according to the document reading device 1a of the first embodiment, the proximity detection unit 403 starts to operate on the condition that the opening and closing detection unit 42 (an example of an opening and closing detection mechanism) detects that the door 12 is open. Therefore, when the door 12 is closed, the proximity detection unit 403 does not operate, so unnecessary power consumption of the proximity detection unit 403 can be suppressed.

In addition, according to the document reading device 1b of the second embodiment, the proximity detection unit 403 detects the temperature change of the space connected to the door 12 based on the output of the proximity sensor 30b. Therefore, the approach of the body to the door 12 can be detected easily and reliably.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the present invention. These new embodiments can be implemented in other various forms, and various omissions, substitutions, combinations, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the present invention, and are included in the present invention described in the claims and its equivalent scope.

For example, in the aforementioned embodiment, the proximity sensors 30a, 30b are provided at the edge of the case 11 on the hinge portion 14 side, but the installation positions of the proximity sensors 30a, 30b are not limited to this position. That is, the proximity sensors 30 a and 30 b may be provided along any one of the four sides of the frame forming the opening 13 .

In addition, the box 11 and the door 12 are not limited to the structure connected by the hinge part 14. That is, for example, the door 12 may have a shutter structure that slides along the opening 13 of the box body 11 .

Also, the method of detecting the approach of the body is not limited to the method using the proximity sensors 30a and 30b described above. That is, it may be configured to detect the approach of the body using a distance measuring sensor using an ultrasonic wave or an optical sensor.

Claims (10)

1. A door opening and closing device, characterized in that it has: a door configured to be openable and closable relative to an opening provided in the box; an approach detection mechanism, which is provided at the door or the opening, and detects the approach of a body to the door or the opening; and The notification unit outputs an alarm on the condition that the approach detection unit detects the approach of the body. 2. The door opening and closing device according to claim 1, wherein: The door portion and the opening portion are connected by a hinge portion, and the proximity detection mechanism is provided near the hinge portion. 3. The door opening and closing device according to claim 1, wherein: The proximity detection mechanism detects a change in electrostatic capacity between the door and a space in which the door is in contact. 4. The door opening and closing device according to claim 1, wherein: The proximity detection mechanism detects a temperature change of a space in contact with the door portion. 5. The door opening and closing device according to claim 1, wherein: It also has an opening and closing detection mechanism that detects the opening and closing of the door, The approach detection mechanism starts to operate on condition that the opening/closing detection mechanism detects that the door is opened. 6. The door opening and closing device according to claim 2, wherein: The proximity detection mechanism detects a change in electrostatic capacity between the door and a space in contact with the door. 7. The door opening and closing device according to claim 2, wherein: The proximity detection mechanism detects a temperature change of a space in contact with the door portion. 8. The door opening and closing device according to claim 2, wherein: It also has an opening and closing detection mechanism that detects the opening and closing of the door, The approach detection mechanism starts to operate on condition that the opening/closing detection mechanism detects that the door is opened. 9. The door opening and closing device according to claim 3, wherein: It also has an opening and closing detection mechanism that detects the opening and closing of the door, The approach detection mechanism starts to operate on condition that the opening/closing detection mechanism detects that the door is opened. 10. The door opening and closing device according to claim 4, wherein: It also has an opening and closing detection mechanism that detects the opening and closing of the door, The approach detection mechanism starts to operate on condition that the opening/closing detection mechanism detects that the door is opened.