JP4952330B2 - Control panel device - Google Patents

Description

  The present invention relates to a control panel device that accommodates information control electrical equipment.

Conventionally, as shown in Japanese Patent No. 3533672 (Patent Document 1), a box having a front opening for accommodating an electrical device for information control and a front door for closing the front side of the box are provided. There is known a control panel device of the front operation type provided. As shown in FIG. 4, the control panel device A includes a box 1 formed in a front opening shape, a front door 2 for closing the front side of the box 1, and between the box 1 and the front door 2. The middle frame 3 is arranged, and an electric device 4 attached to the front surface side of the middle frame 3 and the like. The box 1 and the front door 2 are connected by a hinge 20 provided at one side edge of the front door 2, so that the front door 2 can be opened and closed. Further, a locking clasp 21 is provided at the other side edge of the front door 2, and a locking hole 21 a for locking the locking clasp 21 to be inserted and locked in the middle frame 3. It has been drilled.
Japanese Patent No. 3533672

  The control panel device A shown in the above conventional example is used as a lighting control panel, an air conditioning control panel, a large distribution panel, various communication control panels, and the like. Handling easily may cause a failure or the like, and it may not be possible to perform appropriate desired information communication control. Therefore, the front door 2 cannot be easily opened by the lock stopper 21 or the like. Furthermore, in order to manage opening / closing of the front door 2 unattended, an opening detection sensor may be used.

  This open detection sensor uses a mechanical pressure sensor equipped with a contact switch, is fixed to the box 1 or the front door 2, and the front door 2 completely covers the front opening of the box 1. The contact switch is pressed by the box 1 or the front door 2. This open detection sensor is interlocked with an alarm lamp or buzzer, and when the contact switch is pressed, the lamp or buzzer is not driven because it is in a normal state. If the contact switch is not pressed without disabling the detection function, the front door 2 is improperly opened, so it is considered an abnormal state and the lamp or buzzer is driven to To inform.

  In the above opening detection sensor, when the front door 2 is completely closed, the contact switch needs to be pressed. Therefore, the side edge 1a or 2a provided with the hinge 20 of the box 1 or the front door 2 is provided. It is necessary to be disposed in the vicinity of the side edge 1b or 2b on the opposite side. In particular, in the case of a large control panel, in the state where the front door 2 is closed, there are a number of parts between the box 1 and the front door 2 near the side edge 1b or 2b due to component dimensional errors or assembly errors. There may be a gap in millimeters. In this case, it is easy to see that the open detection sensor is installed in the vicinity of the side edge portion 1b or 2b. Therefore, by inserting a thin plate or the like into the gap, the contact switch of the open detection sensor is pressed. It is possible to maintain and open the front door 2. As a result, it is possible to easily open the front door 2 illegally, and there is a problem that the electric device 4 or the like built in the box 1 is illegally operated.

  Further, since the side edge 2b of the front door 2 is fixed to the box 1 only by the locking clasp 21, both end portions 2c of the side edge 2b are easily bent in the opening direction of the front door 2, and the end 2c. When the open detection sensor is attached in the vicinity, the pressure sensor may be detected due to the bending of the front door 2, and there is a problem that erroneous detection occurs. This is because, when the control panel device A is large, the end portion 2c of the front door 2 is further bent, and erroneous detection is likely to occur.

  The present invention was invented in view of the background art described above, and its purpose is to prevent the front door from being opened illegally, and in addition, when the front door is closed, the front door is bent. It is an object of the present invention to provide a control panel device that prevents erroneous detection that the front door is open.

  In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is a control panel device including a front opening-shaped box that houses an electrical device, and a front door that closes the front side of the box and can be opened and closed. And an open detection sensor having a light receiving element that emits infrared light, a light receiving element that receives the infrared light, and a light reception control unit that calculates the amount of received light based on the result of receiving the infrared light obtained from the light receiving element. The element and the light receiving element are fixed in the box so that infrared light emitted from the light emitting element is reflected by the inner surface of the front door and received by the light receiving element, and the light reception control unit sets a threshold value at which the light reception amount is set in advance. When it falls below, it is judged that the front door is in an open state.

  The invention according to claim 2 of the present application is the control panel device according to claim 1, further comprising an inner frame attached to the front side of the box and disposed between the box and the front door. The open detection sensor is arranged inside the opening, and is arranged on the back side of the opening from the front end of the middle frame.

  In the control panel device according to the first aspect of the present invention, the light emitting element and the light receiving element of the open detection sensor are arranged in the box so that infrared light emitted from the light emitting element is reflected by the inner surface of the front door and received by the light receiving element. The light receiving control unit determines that the front door is in an open state when the amount of received light falls below a preset threshold value. Even if it is a case where it arrange | positions in a location, the opening / closing state of a front door is detectable. As a result, the arrangement location of the open detection sensor can be freely selected, so that the arrangement location of the open detection sensor is not easily detected, and the front door can be prevented from being illegally opened. . Further, in the light reception control unit, a preset threshold range used for determining that the front door is in an open state is set as a range in which it is not determined that the front door is open even when the front door is bent. Therefore, it is possible to prevent erroneous detection due to bending of the front door.

  In the control panel device according to the second aspect of the present invention, the opening detection sensor is disposed on the bottom surface side of the box from the front position of the middle frame, thereby detecting the opening from the gap between the box and the front door. It is difficult to confirm the installation position of the sensor because it is arranged at a position hidden by the middle frame. This can further prevent the location of the open detection sensor from being easily detected.

  1 to 3 show a control panel device A which is an embodiment of the present invention. The control panel device A is provided with a box 1 having a front opening for housing the electric device 4 and a front door 2 that can close and open the front side of the box 1 and emits infrared light. And an open detection sensor 5 having a light receiving element 5b that receives the infrared light, and a light reception control unit 5c that calculates the amount of light received based on the result of light reception of the infrared light obtained from the light receiving element 5b. The element 5b is fixed in the box 1 so that the infrared light emitted from the light emitting element 5a is reflected by the inner surface 2d of the front door 2 and received by the light receiving element 5b, and the light reception control unit 5c sets the light reception amount in advance. It is judged that the front door 2 is in the opened state when the threshold value is below the threshold value. Further, it is provided with a plate-like middle frame 3 that is attached to the front side of the box 1 and disposed between the box 1 and the front door 2, and the middle frame 3 has an opening 3a. In the opening 3 a, the opening 3 a is arranged behind the front end of the middle frame 3.

  Hereinafter, the control panel apparatus A of this embodiment will be described in more detail. As shown in FIGS. 1 and 2, the control panel device A includes a box 1, a front door 2, a middle frame 3, an electric device 4, and an open detection sensor 5.

  The box 1 is a case having a front opening shape, and is formed by pressing a thin metal plate. Furthermore, the inner frame 3 and the electric device 4 can be accommodated, and a wiring opening (not shown) for connecting the electric wiring and communication wiring of the electric device 4 to the outside is provided on the side surface. ing.

  The front door 2 can close the front side of the box 1 and is formed by pressing a thin metal plate. The front door 2 is connected to the box 1 by a hinge 20 and is configured to be freely opened and closed. Furthermore, a locking clasp 21 is provided on the inner surface 2d of the front door 2, and when the front door 2 is closed, the locking clasp 21 is provided on the box 1 with a locking latching portion ( The front door 2 cannot be easily opened by being locked to the (not shown).

  The middle frame 3 is formed by pressing a thin metal plate or the like, and is disposed between the box 1 and the front door 2 and is fixed to the box 1 with a fixing tool such as a screw. Further, the middle frame 3 has an opening 3a, and an opening detection sensor 5 is disposed inside the opening 3a. An electric device 4 is disposed on the front surface of the middle frame 3.

  The electric device 4 is a controller used for lighting control, air conditioning control, etc., an electric lock controller for entrance / exit management, an electric breaker, and the like, attached to the front surface of the middle frame 3 and with the front door 2 opened, It can be operated.

  The open detection sensor 5 includes a light emitting element 5a, a light receiving element 5b, and a light receiving control unit 5c. The opening detection sensor 5 is disposed inside an opening 3 a that opens a part of the middle frame 3.

  Here, the open detection sensor 5 is installed on the bottom side of the box 1 from the front position of the middle frame 3. As a result, it is difficult to confirm the installation position of the opening detection sensor 5 from the gap between the box 1 and the front door 2 due to being disposed at a position hidden by the middle frame 3.

  As shown in FIG. 3, the light emitting element 5a emits infrared light, and emits light toward the inner surface 2d of the front door 2 in a state where the front door 2 is closed. Here, the emitted infrared light is modulated light subjected to noise-resistant modulation. The emitted infrared light is reflected by the inner surface 2d of the front door 2, and the light receiving element 5b receives the reflected infrared light. The light receiving element 5b extracts and demodulates the modulated light reflected by the front door 2. The light reception control unit 5c calculates the amount of received light based on the infrared light reception state reflected by the inner surface 2d of the front door 2 obtained from the light receiving element 5b.

  The light reception control unit 5c compares the received light amount of infrared rays when the front door 2 is closed, which is a threshold value stored in advance in a memory unit (not shown), with the received light amount calculated from the received light state. Then, it is determined whether or not the front door 2 is in an open state.

  When the front door 2 is closed and bent toward the front side (the direction of the arrow α in FIG. 3), the distance from the open detection sensor 5 to the inner surface 2d of the front door 2 increases. A threshold value indicating that the front door 2 is in a closed state is stored in a memory unit (not shown) in advance even when the amount of light received is maximum when the front door 2 is closed. Therefore, it is possible to prevent erroneous detection due to the bending of the front door 2.

  The light reception control unit 5c is connected to an alarm generation device (not shown) provided in or around the control panel device A. In the alarm generation device (not shown), when the detection control for the unauthorized opening of the front door 2 is enabled, a signal indicating that the front door 2 is opened from the light receiving control unit 5c is received. It is possible to judge that the front door 2 has been opened illegally and to issue an alarm to notify the user. Here, the alarm device (not shown) can be configured to notify the user by LED lighting or a display by a liquid crystal screen or a notification by sound.

  Furthermore, the light reception control unit 5c is connected to a central monitoring device (not shown) composed of a personal computer or a dedicated terminal that can notify an alarm to the outside by a communication network, and the front door 2 is illegally connected. It is possible to confirm remotely whether or not it has been opened.

  Therefore, the light emitting element 5a and the light receiving element 5b of the open detection sensor 5 in this embodiment are arranged in the box 1 so that the infrared light emitted from the light emitting element 5a is reflected by the inner surface 2a of the front door 2 and received by the light receiving element 5b. The light reception control unit 5c determines that the front door 2 is in an opened state when the light reception amount falls below a preset threshold range. Even if it is arranged at any location in the box 1, the open / closed state of the front door 2 can be detected. As a result, the arrangement location of the opening detection sensor 5 can be freely selected, so that the arrangement location of the opening detection sensor 5 is not easily detected, and the front door 2 is prevented from being illegally opened. be able to.

  Further, in the light reception control unit 5c, the preset threshold range used for determining that the front door 2 is opened is not determined to be the opened state even when the front door 2 is bent. By setting the range, it is possible to prevent erroneous detection due to bending of the front door 2.

  Further, the opening detection sensor 5 is arranged on the bottom side of the box 1 from the front position of the middle frame 3 so that the installation position of the opening detection sensor 5 is confirmed from the gap between the box 1 and the front door 2. It is difficult to do this because it is arranged at a position hidden by the middle frame 3. This can further prevent the location of the open detection sensor 5 from being easily detected.

It is an external appearance perspective view of the control panel apparatus which is embodiment of this invention. It is a front view of the state which opened the front door in the control panel apparatus. The control board apparatus is shown, (a) is a front view, (b) is XX schematic sectional drawing of (a). It is a disassembled perspective view of the control panel apparatus which is a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Box 1a, 1b (Box) side edge 2 Front door 2a, 2b (Front door) side edge 2d (Front door) inner surface 3 Middle frame 4 Electric equipment 5 Opening detection sensor 5a Light emitting element 5b Light receiving element 5c Light-receiving control unit 20 Hinge A Control panel device

Claims (2)

  A control panel device comprising a front opening box that houses electrical equipment, and a front door that can be opened and closed by closing the front side of the box, a light emitting element that emits infrared light, and a light receiving element that receives the infrared light And an open detection sensor that calculates the amount of received light based on the result of receiving infrared light obtained from the light receiving element, and the light emitting element and the light receiving element are configured so that the infrared light emitted from the light emitting element is within the front door. It is fixed in the box so that it is reflected by the surface and received by the light receiving element, and the light receiving control unit determines that the front door is open when the amount of received light falls below a preset threshold value. A control panel device characterized by being.   It is attached to the front side of the box and includes a middle frame disposed between the box and the front door. The middle frame has an opening, and the open detection sensor is disposed inside the opening. The control panel device according to claim 1, wherein the control panel device is disposed on the deeper side of the opening than the front end of the control panel.

Images