JP2018142279A - Door opening detector of roadside wireless communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door opening detector of a roadside wireless communication device capable of suppressing illegal opening of an opening/closing door while opening of the opening/closing door is not detected.SOLUTION: A door opening detector of a roadside wireless communication device comprises: a magnet 51 provided on a member on one side of a housing side and an opening/closing door 31 side; and a magnetic member 52 provided on a member on the other side and adhering to the magnet in a state where the opening/closing door is closed. When the opening/closing door is opened, the adhesion of the magnetic member to the magnet is released to detect opening of the opening/closing door. At least one of the magnet and the magnetic member is elongated in a direction from an opening/closing base end side of the opening/closing door toward an opening/closing distal end side in a state where the opening/closing door is closed, and there is provided a protruding member 56A in the housing or opening/closing door for hiding the opening/closing distal end side of the magnet during a period from the closed state of the opening/closing door until the opening/closing door opens and the door opening detector detects opening of the opening/closing door.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an opening detection device for a roadside wireless communication device.

  In recent years, vehicles have received information from roadside wireless communication devices that are roadside wireless communication devices installed on roads (road-to-vehicle communication), or vehicles have exchanged information wirelessly (vehicle-to-vehicle communication) and received Intelligent transport systems ("ITS") that improve the safety of vehicle traffic by utilizing various information are being studied. The roadside wireless communication device can transmit and receive information to and from a central device installed in, for example, a traffic control center via a communication line (see, for example, Non-Patent Documents 1 and 2).

ITS Information Communication System Promotion Conference, “700 MHz Band Intelligent Transport System Extended Function Guidelines ITS FORUM RC-010 1.0 Edition”, [online], March 15, 2012, [Search January 9, 2015] Internet <http://www.itsforum.gr.jp/> ITS Information and Communication System Promotion Conference, “700 MHz Band Intelligent Transportation System Experimental Vehicle-to-Vehicle Communication Message ITS FORUM RC-013 1.0 Edition”, “online”, March 31, 2014, [January 9, 2015 Day search], Internet <http://www.itsforum.gr.jp/>

  The roadside radio communicator of the above intelligent road traffic system has a configuration in which a communication module is provided inside a casing that is opened and closed by an open / close door, and the communication module memory and the like are used for road-to-vehicle communication and the like. Stores security information. For this reason, the open / close door is locked in a closed state, but if a malicious person unlocks the door, security information may be stolen and communication information may be tampered with.

  Therefore, it has been proposed to detect that the opening / closing door is opened with a magnet switch and to transmit the detection signal as an abnormal signal to the central device. The magnet switch includes a magnet provided in the housing (or the door) and a magnetic plate provided in the door (or the housing) and attracted to the magnet when the door is closed, and the door is opened. When the magnetic plate moves away from the magnet, the opening of the open / close door is detected.

  The magnet and magnetic plate constituting the magnet switch are generally formed in an elongated shape. For example, when the accommodation space inside the housing is narrow, the opening and closing door is closed in the longitudinal direction of the magnet and the magnetic plate. Thus, the door may be arranged in a state from the open / close base end side of the open / close door toward the open / close front end side. However, in this case, when the opening / closing door is opened, the magnet switch is not in a detection state unless the opening angle is increased to a certain extent.

  For example, a malicious person opens the open / close door until the magnet switch is in the detection state, and inserts another magnetic plate into the magnet from the gap between the open / close end of the open / close door and the housing. Adsorb. If the door is further opened while maintaining this attracted state, even if the regular magnetic plate is separated from the magnet, another magnetic plate is attracted to the magnet, so the magnet switch opens the door. Will not be detected. Thereby, even if the opening / closing door is opened, the closed state can be camouflaged, and the security information may be stolen.

  The present invention has been made in view of such circumstances, and an opening detection device for a roadside wireless communication device capable of suppressing the opening and closing of the opening and closing door without detecting the opening of the opening and closing door. The purpose is to provide.

  An opening detection device for a roadside wireless communication device according to an aspect of the present invention is configured by accommodating a communication module that performs wireless communication with an in-vehicle communication device inside a housing provided with an opening / closing door. In the roadside wireless communication device, the opening / closing door is provided on a magnet provided on a member on one side of the casing side and the opening / closing door side and on a member on the other side of the casing side and the opening / closing door side. And a magnetic member that is attracted to the magnet when the door is closed.When the door is opened, the magnetic member and the magnet are released from being attracted, thereby opening the door. An opening detection device for a roadside wireless communication device for detecting a door, wherein at least one of the magnet and the magnetic member is opened and closed from the open / close base end side of the open / close door in a state where the open / close door is closed Elongated in the direction toward the side It is provided in the casing or the opening / closing door, and from the closed state of the opening / closing door until the opening / closing door is opened and the opening detection device detects the opening of the opening / closing door, It is a door opening detection apparatus of a roadside radio communication apparatus provided with the projection member which hides the opening-and-closing front end side of the magnet.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that an opening / closing door is opened illegally, without detecting the opening of an opening / closing door.

1 is a plan view of a road to which a traffic control system including an opening detection device for a roadside wireless communication device according to an embodiment of the present invention is applied. It is a perspective view of a roadside radio communication machine using an opening detection device. It is a front view of the roadside radio | wireless communication apparatus of the state which opened and closed the door. It is a perspective view of the roadside radio communication machine in the state where the open / close door and the inner door are opened. It is a partial cross section enlarged front view which shows a magnet and its circumference | surroundings. It is an enlarged plan view which shows a magnet and its periphery. It is an enlarged front view which shows a magnetic member and its periphery. It is an expansion perspective view which shows a magnetic member and its periphery. It is the partial cross section side view which looked at the magnet switch from the opening-and-closing front end side of the opening-and-closing door in the state which closed the opening-and-closing door. It is a magnified front view which shows the 1st modification of a magnetic member and shows the magnetic member seen from the back surface side of the closed door, and its periphery. It is the enlarged front view which shows the magnetic member of the 1st modification seen from the back surface side of the opening-and-closing door opened, and its periphery. It is a magnified front view which shows the 2nd modification of a magnetic member and shows the magnetic member seen from the back surface side of the closed door, and its periphery. It is the enlarged front view which shows the magnetic member of the 2nd modification seen from the back surface side of the opening-and-closing door opened, and its periphery.

[Description of Embodiment of the Present Invention]
First, the contents of the embodiment of the present invention will be listed and described.
(1) A door detection device for a roadside wireless communication device according to an embodiment of the present invention includes a communication module that performs wireless communication with an in-vehicle communication device inside a housing provided with an opening / closing door. In the configured roadside wireless communication device, a magnet provided on a member on one side of the housing side and the door side, and a member on the other side of the housing side and the door side, A magnetic member that is attracted to the magnet in a state in which the opening and closing door is closed, and the opening and closing of the magnetic member and the magnet is released when the opening and closing door is opened. An opening detection device for a roadside wireless communication device for detecting the opening of a door, wherein at least one of the magnet and the magnetic member is a base end side of the opening / closing door in a state where the opening / closing door is closed In the direction from the opening / closing tip side From the closed state of the opening / closing door, the opening / closing door is opened, and the opening detection device detects the opening of the opening / closing door. In the meantime, a projecting member for hiding the open / close tip side of the magnet is provided.

  According to the door opening detection device of the roadside wireless communication device, the opening and closing tip side of the magnet can be hidden by the protruding member from the door closing state until the door opening detection device detects the opening of the door. it can. As a result, a malicious person inserts another magnetic member into the gap between the opening / closing tip of the opening / closing door and the housing between the closing state of the opening / closing door and the opening detection device detecting the opening of the opening / closing door. However, the projection member can prevent the other magnetic member from being attracted to the magnet. As a result, it is possible to suppress the opening / closing door from being illegally opened without the other magnetic member being attracted to the magnet and the opening detection device detecting the opening of the opening / closing door.

  (2) In the door detection device of the roadside wireless communication device, it is preferable that the protruding member is a screw member. In this case, the protruding member can be easily attached to the housing or the door.

(3) In the door detection device for the roadside wireless communication device, the screw member is preferably a special screw that is tightened using a special tool.
In this case, for example, if the magnetic member is fixed with a special screw, a malicious person cannot remove the magnetic member and attach it to the magnet unless a special tool is used. Thereby, it can further suppress that an opening / closing door is opened illegally, without the opening detection apparatus detecting the opening of an opening / closing door.

(4) In the opening detection device of the roadside wireless communication device, one of the attracting surface of the magnet and the attracted surface of the magnetic member is the other as it goes from the open / close base end to the open / close distal end. It is preferable that they are always tilted so as to protrude toward the surface.
When the magnet's attracting surface or the attracted surface of the magnetic member is not inclined as described above, when opening and closing the door from the closed state, the magnet and magnetic member's attracting part opens and closes from the opening / closing tip side. Since the movement distance in the door opening direction is shorter on the base end side, the timing at which suction is released is delayed.

  On the other hand, in the door detection device of the above (4), the magnet attracting surface and the attracted surface of the magnetic member are attracted in the inclined state when the open / close door is closed. When the door is opened from the closed state, it is possible to release the opening / closing base end side where the timing of releasing the adsorption is delayed among the adsorbing portions of the magnet and the magnetic member at an earlier timing. Thereby, since the door opening detection apparatus can detect opening of an opening-and-closing door earlier, the door opening angle when a door opening detection apparatus detects opening can be made smaller. As a result, it is possible to effectively suppress another magnetic member from being inserted through the gap between the opening / closing tip of the opening / closing door and the housing.

(5) In the door detection device of the roadside wireless communication device, a long side of the at least one of the magnet and the magnetic member in a direction from the opening / closing base end side to the opening / closing distal end side extends in a horizontal direction. It is preferable.
In this case, the direction from the open / close base end side to the open / close front end side is the horizontal direction, and the open / close door opens and closes in the horizontal direction. When another magnetic member is inserted into the gap between the opening / closing front end of the door and the housing, the other magnetic member is attracted to the magnet. This can be disturbed by the protruding member.

(6) In the opening detection device of the roadside wireless communication device, the magnetic member is attached to the other member with play in a direction perpendicular to the attracted surface of the magnetic member. It is preferable to further include an elastic member provided on the member on the other side and pressing the magnetic member toward the magnet.
In this case, for example, even if there is a variation in the closing position of the opening / closing door with respect to the housing due to packing or the like that seals between the opening / closing door and the housing, the magnetic member is moved within the range of play according to the variation. By moving the magnet, the attracting position between the magnet and the magnetic member can also be moved. And since the magnetic member is always pressed to the magnet side by the elastic force of the elastic member even if the adsorption position fluctuates, the magnetic member can be reliably adsorbed to the magnet when the open / close door is closed. .

(7) In the opening detection device for the roadside wireless communication device, it is preferable that the casing has an inner door therein, and a magnet or a magnetic member on the casing side is attached to the inner door. .
In this case, for example, even if the attachment position of the magnet or the magnetic member attached to the inner door varies due to an attachment error of the inner door inside the housing, the magnetic member is moved according to the variation. By moving within the range, the attracting position between the magnet and the magnetic member can also be moved. Thereby, even if a magnet or a magnetic member is attached to the inner door in the housing, the magnetic member can be reliably attracted to the magnet when the open / close door is closed.

(8) In the door opening detection device of the roadside wireless communication device, the casing has an inner door that opens and closes in the same direction as the opening and closing direction of the opening and closing door, and the magnet or magnetic member on the casing side includes: It is attached to the inner door, the projecting member is provided on the other side member, and the end of the magnetic member on the opening / closing tip side is hooked in a state where the opening / closing door is closed, It is preferable that the magnetic member is configured such that the end of the magnetic member is detached from the protruding member and cannot be attracted to the magnet by releasing the attracting with the magnet while the opening / closing door is opened. .
When the inner door opens and closes in the same direction as the opening and closing direction of the door, for example, when the opening and closing door and the inner door are opened to perform maintenance work inside the housing, the following problems may occur. . When the open / close door and the inner door are close to each other during work, one of the magnet and the magnetic member attached to the inner door side is attracted to the other provided on the open / close door side. The opening detection device is in a state where the opening / closing door is not detected even though the opening / closing door is open.

  On the other hand, in the door detection device of the above (8), the end of the magnetic member is detached from the protruding member by releasing the adsorption of the magnet and the magnetic member while the opening / closing door is being opened. Therefore, when the inner door is opened after the opening / closing door is opened, the magnetic member is not attracted to the magnet even if the doors are close to each other. Thereby, it can suppress that the door opening detection apparatus will be in the state which is not detecting the opening although the opening-and-closing door is opening.

(9) In the opening detection device for the roadside wireless communication device, the end of the magnetic member on the open / close base end side or the end of the open / close front end side of the open / close front end side falls off from the protruding member. When the door is closed in a closed state, it is preferable that the door is engaged between the door and the casing in the middle of closing to prevent the door from being closed.
When the open / close door is opened, if the end of the magnetic member opens and closes and the end of the magnetic member falls off the protruding member and cannot be attracted to the magnet, the magnetic member will be attracted to the magnet even if the door is closed in that state. Therefore, the opening detection device remains in a state where the opening / closing door is detected.

  On the other hand, in the door opening detection device of the above (9), even if the opening / closing tip end of the magnetic member is detached from the protruding member and the opening / closing door is closed, the opening / closing door and the housing are in the middle of closing the door. The opening / closing proximal end side or the opening / closing distal end side end portion of the magnetic member bites the opening / closing door, thereby preventing the opening / closing door from closing. As a result, when the opening / closing door is closed with the end of the opening / closing tip side of the magnetic member falling off the protruding member, the opening / closing detection device detects that the opening / closing door is open and the door is closed. Can be suppressed.

[Details of the embodiment of the present invention]
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[First Embodiment]
[Traffic control system]
FIG. 1 is a plan view of a road to which a traffic control system including an opening detection device for a roadside wireless communication device according to an embodiment of the present invention is applied. This traffic control system includes a central device 3 provided in a traffic control room or the like, a roadside radio communication device 4, a traffic signal 5, and an in-vehicle communication device 7 mounted on a vehicle 6 traveling on a road R.

  The traffic signal device 5 includes a traffic signal light device 5a that emits red, blue and yellow light colors, and a traffic signal control device 5b for controlling the light color of the traffic signal light device 5a. The traffic signal controller 5b is connected to the roadside router 9 by a communication line 8a. The roadside router 9 is connected to a router 11 on the central device 3 side via a network 10.

  The signal control information i1 generated by the central device 3 that collects traffic information, manages traffic, and controls traffic is transmitted to the traffic signal controller 5b of each traffic signal 5 through the network 10 and the communication line 8a. On the other hand, the traffic signal controller 5b transmits execution information i2 indicating the actual results of signal control performed to the central device 3.

  One roadside wireless communication device 4 is installed at each intersection C, and wirelessly transmits information i3 to be transmitted to the in-vehicle communication device 7 of the traveling vehicle 6, and information transmitted by the in-vehicle communication device 7 is also transmitted. Receive wirelessly. The roadside wireless communication device 4 of the present embodiment is a medium / wide area wireless communication device (including 700 MHz band wireless communication) compliant with wireless LAN, WiMAX (Worldwide Interoperability for Microwave Access), etc., assuming an ITS wireless system. is there.

  The information i3 transmitted by the roadside wireless communication device 4 includes traffic information (congestion information, traffic regulation information, etc.) distributed by the central device 3. The information transmitted by the in-vehicle communication device 7 includes information data such as the vehicle ID, vehicle type information, and position information of the vehicle 6. The roadside wireless communication device 4 is connected to the roadside router 9 by a communication line 8b. The vehicle information i4 included in the information data transmitted by the in-vehicle communication device 7 is transmitted from the roadside wireless communication device 4 to the central device 3 through the communication line 8b and the network 10.

  The in-vehicle communication device 7 has a communication function for wirelessly transmitting and receiving information to and from the roadside wireless communication device 4. When the vehicle 6 enters the communication area of the roadside wireless communication device 4 while the vehicle 6 is traveling toward the intersection C, the in-vehicle communication device 7 wirelessly receives the information i3 from the roadside wireless communication device 4 and includes information including the information data. Is wirelessly transmitted to the roadside wireless communication device 4 at a predetermined transmission cycle (for example, 100 milliseconds).

[Roadside wireless communication device]
FIG. 2 is a perspective view of the roadside wireless communication device 4 using the door opening detection device according to the present embodiment. The roadside wireless communication device 4 includes a housing 20, an opening / closing door 31 that opens and closes an opening of the housing 20, and a communication module 40 (see FIG. 3) housed inside the housing 20.

  FIG. 3 is a front view of the roadside wireless communication device 4 with the open / close door 31 open. 2 and 3, the housing 20 includes a housing body 21 and an inner door 22 provided inside the housing body 21. The housing main body 21 is formed of, for example, a rectangular parallelepiped box that is long in the vertical direction, and is attached to a signal column (not shown). An opening 21 a is formed on the front surface of the housing body 21.

  The open / close door 31 is formed in a rectangular shape that is long in the vertical direction in accordance with the shape of the opening 21 a of the housing body 21. The right edge of the open / close door 31 is supported by the front right edge of the housing body 21 via a pair of upper and lower hinges 32 so as to be rotatable in the horizontal direction. Thereby, the opening / closing door 31 is attached to the housing body 21 so as to be freely opened and closed.

  A locking device 33 that locks the opening / closing door 31 in a closed state is attached to the opening / closing front end side of the opening / closing door 31. In addition, a resin packing 34 is fixed to the rear surface of the opening / closing door 31 along the outer peripheral edge thereof. When the opening / closing door 31 is closed, the packing 34 has a peripheral edge of the opening 21 a of the housing body 21. By contacting the whole, the inside of the housing body 21 is sealed.

  The inner door 22 is made of, for example, a plate member formed in a square shape, and is disposed on the upper side in the housing body 21. The right edge of the inner door 22 is supported on the right inner surface of the housing body 21 via a pair of upper and lower hinges 23 so as to be rotatable in the horizontal direction. As a result, as shown in FIG. 4, the inner door 22 is attached to the housing body 21 so as to open and close in the same direction as the opening and closing direction of the opening and closing door 31. A lock member 24 that holds the inner door 22 in a closed state is attached to the inner surface on the left side of the housing body 21. The inner door 22 may be opened and closed in a direction different from the opening / closing door 31. Further, the housing 20 does not necessarily include the inner door 22.

  As described above, the communication module 40 has a communication function for performing wireless communication with the in-vehicle communication device 7 and a communication function for performing communication with the central device 3. The communication module 40 is disposed on the back side (rear side) of the inner door 22 in the housing body 21. Thereby, the entire communication module 40 is covered with the inner door 22 by closing the inner door 22.

[Opening detection device]
In FIG. 3, the roadside wireless communication device 4 is provided with a magnet switch (opening detection device) 50 that detects that the opening / closing door 31 is opened. The magnet switch 50 according to the present embodiment includes a magnet 51 provided on the upper side of the housing 20 and a magnetic member 52 provided on the upper side of the open / close door 31. When the open / close door 31 is closed, the magnetic member 52 is attracted to the magnet 51, and when the open / close door 31 is opened, the magnet switch 50 is opened and closed by releasing the adsorption of the magnet 51 and the magnetic member 52. The opening of the door 31 is detected. The detection signal of the magnet switch 50 is transmitted as an abnormal signal to the central device 3 by the communication module 40.

  The magnetic member 52 is elongated in the direction (left and right direction in FIG. 3) from the open / close base end side (hinge 32 side) of the open / close door 31 to the open / close distal end side (locking device 33 side). It is elongated in the same direction as the member 52. That is, the magnet 51 and the magnetic member 52 are formed in an elongated shape in a direction from the open / close base end side of the open / close door 31 toward the open / close front end side with the open / close door 31 closed. In the present embodiment, since the direction from the open / close base end side of the open / close door 31 to the open / close front end side is the horizontal direction, the magnet 51 and the magnetic member 52 have long sides 51e and 52e extending in the horizontal direction, respectively. . Hereinafter, the right side in front view of the housing 20 is also referred to as “opening / closing base end side”, and the left side in front view is also referred to as “opening / closing distal end side”.

  In addition, although the magnet 51 and the magnetic member 52 are each arrange | positioned at the upper side of the housing | casing 20 and the upper side of the door 31, you may arrange | position at the lower side of the housing | casing 20 and the lower side of the door 31 respectively. . The magnet switch 50 may be one in which the magnet 51 is provided on the open / close door 31 and the magnetic member 52 is provided on the housing 20. Moreover, although the magnet 51 and the magnetic member 52 are elongated in the direction from the opening / closing base end side of the opening / closing door 31 to the opening / closing distal end side, only one of them may be formed elongated in that direction.

[magnet]
FIG. 5 is a partially sectional enlarged front view showing the magnet 51 and its surroundings. FIG. 6 is an enlarged plan view showing the magnet 51 and its surroundings. 5 and 6, the magnet 51 is fixed to the upper surface of the inner door 22 via a bracket 53 and a holding member 54. The magnet 51 is fixed to the inner door 22 side, but may be fixed to the housing body 21 side.

  The bracket 53 has a vertical plate portion 53a fixed to the upper surface of the inner door 22, and a horizontal plate portion 53b extending horizontally from the upper end of the vertical plate portion 53a toward the front. The front end surface 53 c of the horizontal plate portion 53 b is disposed in parallel with the front surface 22 a of the inner door 22. In addition, screw holes 53d are formed through both sides of the horizontal plate portion 53b in the plate thickness direction.

  The holding member 54 includes a box-shaped storage portion 54a that stores the magnet 51, and a pair of flange portions 54b that extend outward in the left-right direction from the upper side of both left and right ends of the storage portion 54a. Each flange 54b is formed with an insertion hole 54c through which the screw member 55 is inserted, penetrating in the vertical direction. The screw member 55 passes from the lower side of the flange portion 54b through the insertion hole 54c of the flange portion 54b and is screwed into the screw hole 53d of the horizontal plate portion 53b. Thereby, the holding member 54 is fixed to the horizontal plate portion 53 b of the bracket 53.

  The remaining part of the magnet 51 except the front end 51b is inserted and fixed in the storage part 54a of the holding member 54. The front end surface of the magnet 51 (front end portion 51b) is an adsorption surface 51a to which the magnetic member 52 is adsorbed. The magnet 51 and the holding member 54 are fixed to the bracket 53 so that the attracting surface 51a is inclined with respect to the front end surface 53c of the horizontal plate portion 53b. Specifically, the attracting surface 51a of the magnet 51 is fixed to the bracket 53 in an inclined state so as to protrude forward as it goes from the right side to the left side in FIG. In other words, the attracting surface 51a is arranged in an inclined state so as to protrude toward the attracted surface 52a (see FIG. 7) of the magnetic member 52 from the open / close base end side toward the open / close distal end side. .

  In this way, by tilting the attracting surface 51a of the magnet 51, the attracting surface 51a of the magnet 51 and the attracted surface 52a of the magnetic member 52 are attracted in an inclined state with the open / close door 31 closed. . For this reason, when the opening / closing door 31 is opened from the closed state, at the suction portion of the magnet 51 and the magnetic member 52, the opening / closing base end side where the suction release timing is delayed is released at an earlier timing. be able to. Thereby, since the magnet switch 50 can detect that the opening / closing door 31 has been opened earlier, the opening angle when detecting the opening of the opening / closing door 31 can be further reduced. As a result, as will be described later, it is possible to effectively suppress another magnetic member from being inserted through a gap between the opening / closing tip portion of the opening / closing door 31 and the housing main body portion 21 by a malicious person.

  The inclination angle θ of the suction surface 51a with respect to the front end surface 53c of the horizontal plate portion 53b is preferably set to 3 ° or more and 7 ° or less. When the tilt angle θ exceeds 7 °, the attracted surface 52a of the magnetic member 52 cannot be matched with the tilt angle θ of the attracting surface 51 within a range of play (described later), and when the tilt angle θ is less than 3 °. This is because the opening of the open / close door 31 cannot be detected effectively and quickly by the magnet switch 50. In the present embodiment, the inclination angle θ is set to 5 °.

  In the present embodiment, the attracting surface 51a of the magnet 51 is always arranged in an inclined state, but the attracted surface 52a of the magnetic member 52 may be arranged in an always inclined state. In this case, for example, if the holding member 54 that holds the magnet 51 is supported with play with respect to the bracket 53 so that the attracting surface 51 a of the magnet 51 is inclined according to the inclination angle of the attracted surface 52 a of the magnetic member 52. Good.

[Magnetic member]
FIG. 7 is an enlarged front view showing the magnetic member 52 and its surroundings. FIG. 8 is an enlarged perspective view showing the magnetic member 52 and its surroundings. 7 and 8, the magnetic member 52 is made of, for example, a metal plate member formed in a rectangular shape, and is longer than the magnet 51 in the longitudinal direction. The front surface of the magnetic member 52 has a central portion in the longitudinal direction as an attracted surface 52 a that is attracted to the attracting surface 51 a of the magnet 51. The magnetic member 52 has a pair of screw members 56 through a washer 57 at a position where the attracted surface 52a is attracted to the attracting surface 51a of the magnet 51 when the open / close door 31 is closed on the back side of the open / close door 31. Attached.

  Specifically, insertion holes (not shown) through which the screw members 56 are inserted are formed at both ends in the longitudinal direction of the magnetic member 52 so as to penetrate in the plate thickness direction. The screw member 56 passes through the insertion hole of the magnetic member 52 and is screwed into a screw hole (not shown) of the boss member 58. The boss member 58 is fixed to the back surface of the open / close door 31 via the base plate 59.

The screw member 56 is screwed between the washer 57 and the boss member 58 so that the magnetic member 52 has a play S (see FIG. 9) in a direction perpendicular to the attracted surface 52a. Thereby, the magnetic member 52 is attached to the open / close door 31 with a play S.
An elastic member 60 that presses the magnetic member 52 forward is fixed to the base plate 59 at a position facing the center of the back surface of the magnetic member 52. The elastic member 60 is formed in a rectangular parallelepiped shape by, for example, EPDM (ethylene propylene diene rubber).

  As described above, since both ends in the longitudinal direction of the magnetic member 52 are attached to the open / close door 31 with play S, respectively, when the magnetic member 52 is attracted to the attracting surface 51a of the magnet 51, The magnetic member 52 can be inclined corresponding to the inclination of the attracting surface 51a. As a result, the attracted surface 52a of the magnetic member 52 can be attracted along the attracting surface 51a.

  Further, even if there is a variation in the closing position of the opening / closing door 31 with respect to the housing 20 due to the packing 34 or a variation in the attachment position of the magnet 51 due to an attachment error of the inner door 22, these variations. Accordingly, by moving the magnetic member 52 within the range of the play S, the attracting position between the magnet 51 and the magnetic member 52 can also be moved. Since the magnetic member 52 is always pressed toward the magnet 51 by the elastic force of the elastic member 60 even if the adsorption position is changed, the magnetic member 52 is securely attached to the magnet 51 when the door 31 is closed. Can be absorbed.

  The play S is preferably set within a predetermined length range. If the play S becomes too long, the opening angle of the open / close door 31 becomes too large before the adsorption of the magnet 51 and the magnetic member 52 is released, and a malicious person, as will be described later, This is because another magnetic member can be easily inserted from the gap with the housing 20. Further, if the play S becomes too short, variations in the attachment position of the magnet 51 and the like cannot be absorbed within the length range of the play S.

[Protrusion member]
FIG. 9 is a partial cross-sectional side view of the magnet switch 50 as viewed from the open / close tip side of the open / close door 31 with the open / close door 31 closed. In FIG. 9, a head 56 </ b> A <b> 1 of a screw member 56 </ b> A (see also FIG. 7) that attaches the end of the magnetic member 52 on the opening / closing front end side to the opening / closing door 31 side has a magnet 51 with the opening / closing door 31 closed. The size of the front end 51b is such that it hides the open / close tip side.

  Further, while the opening / closing door 31 is closed until the magnet switch 50 detects the opening of the opening / closing door 31, the front end surface of the head 56A1 moves by a distance L in the right direction in FIG. 9, but the head 56A1. Is formed in such a size as to hide the open / close tip side of the front end 51b during the moving distance L. Therefore, the screw member 56 </ b> A functions as a protruding member that hides the opening / closing front end side of the front end portion 51 b of the magnet 51 from when the opening / closing door 31 is closed until the magnet switch 50 detects the opening of the opening / closing door 31.

  Thus, a gap between the opening / closing distal end portion of the opening / closing door 31 and the casing main body portion 21 from when the malicious person detects that the opening / closing door 31 is opened after the opening / closing door 31 is closed. Even if another magnetic member is inserted into the magnetic member 51, the protrusion member 56A can prevent the other magnetic member from being attracted to the magnet 51. As a result, it is possible to prevent the opening / closing door 31 from being illegally opened without the magnetic switch 50 detecting the opening of the opening / closing door 31 due to the other magnetic member attracted to the magnet 51.

Further, since the protruding member 56A is a screw member, it can be easily attached to the open / close door 31 side. Furthermore, since the screw member 56A for fixing the magnetic member 52 to the opening / closing door 31 side is used as a protruding member that hides the opening / closing tip side of the front end portion 51b of the magnet 51, the number of parts is reduced, and the structure is simplified. Can be planned.
In the present embodiment, the screw member 56A that fixes the magnetic member 52 to the door 31 side is used as a protruding member that hides the magnet 51. However, a dedicated member may be separately provided as the protruding member.

  In FIG. 7, the protruding member 56A is a special screw that is tightened by using a special tool. In the projection member 56A of the present embodiment, for example, the star-shaped tool engagement groove 56A2 is formed in the head portion 56A1, but a tool engagement groove of another special shape may be formed. In the present embodiment, the screw member 56B that attaches the end of the magnetic member 52 on the open / close base end side to the open / close door 31 side is also star-shaped on the head 56B1 in the same manner as the protruding member (screw member) 56A. A tool engagement groove 56B2 is formed.

As a result, a malicious person cannot remove the magnetic member 52 from the open / close door 31 and attach it to the magnet 51 on the housing 20 side unless a special tool is used. As a result, it is possible to further prevent the opening / closing door 31 from being opened illegally without the magnet switch 50 detecting the opening of the opening / closing door 31.
In this embodiment, both screw members 56A and 56B are special screws, but only one screw member may be a special screw, or both screw members may be general screws that can be tightened by a general-purpose tool.

[First Modification of Magnetic Member]
FIG. 10 shows a first modification of the magnetic member, and is an enlarged front view showing the magnetic member and its surroundings viewed from the back side of the closed door. FIG. 11 is an enlarged front view showing the magnetic member of the first modified example and its surroundings as seen from the back side of the opened door. 10 and 11, the packing 34, the washer 57, the base plate 59, and the elastic member 60 are not shown for convenience of explanation.

In FIG. 10, a long hole 52c into which the screw portion 56B3 of the screw member 56B is inserted is formed at the end portion on the open / close base end side (left side in the drawing) of the magnetic member 52 ′ of the first modification. The long hole 52c is formed long in the longitudinal direction of the magnetic member 52 ′.
Further, a groove 52b that is hooked on the threaded portion 56A3 of the protruding member 56A is formed at the end of the magnetic member 52 ′ on the opening / closing tip side (right side in the drawing). The groove 52b is formed long in the longitudinal direction of the magnetic member 52 ', and the opening / closing tip side is open. Thereby, magnetic member 52 'is supported so that movement to a longitudinal direction is possible to screw members 56A and 56B.

In the closed state of the open / close door 31, the magnetic member 52 'is disposed most biased toward the open / close distal end side with respect to the screw members 56A and 56B, and the screw portion 56B3 is an end portion of the long hole 52c on the open / close proximal end side. And the screw portion 56A3 is located at the end of the groove 52b on the open / close base end side.
When the opening / closing door 31 is opened from this state, the relative position between the magnet 51 and the magnetic member 52 ′ tends to change. However, since the magnetic member 52 ′ is attracted to the magnet 51, the screw member together with the magnet 51 is used. It moves to the open / close base end side with respect to 56A and 56B.

  Then, when the magnetic member 52 ′ moves to a position that is most biased toward the open / close base end side with respect to the screw members 56A and 56B, as shown in FIG. 52b is disengaged from the threaded portion 56A3, and the adsorption between the magnet 51 and the magnetic member 52 ′ is released, so that the end of the magnetic member 52 ′ on the opening / closing tip side falls off from the protruding member 56A. That is, the end of the magnetic member 52 ′ on the opening / closing front end side rotates downward by its own weight with the screw portion 56 </ b> B <b> 3 as the center. As a result, the magnetic member 52 ′ is in a state where the longitudinal direction thereof is directed in the vertical direction as indicated by a two-dot chain line in FIG. 11, and the attracted portion 52 a of the magnetic member 52 ′ cannot be attracted to the magnet 51. It becomes.

  When closing the opening / closing door 31 from this state, the end of the magnetic member 52 ′ on the opening / closing front end side is manually rotated upward, and as shown in FIG. 10, the groove 52b is formed in the threaded portion 56A3 of the protruding member 56A. The door 31 may be closed after being hooked on the door. Thereby, when the door 31 is closed, the magnetic member 52 ′ can be attracted to the magnet 51.

  As described above, in the magnet switch 50 including the magnetic member 52 ′ according to the first modified example, the magnet 51 and the magnetic member 52 ′ are released during the opening of the opening / closing door 31, thereby opening and closing the magnetic member 52 ′. The end on the front end side falls out of the protruding member 56A and cannot be attracted to the magnet 51. Thus, when the inner door 22 is opened after the opening / closing door 31 is opened (see FIG. 4), the magnetic member 52 ′ is not attracted to the magnet 51 even if the doors 31 and 22 are close to each other. Therefore, the magnet switch 50 can be prevented from being in a state where the opening / closing door 31 is not detected even though the opening / closing door 31 is opened.

[Second Modification of Magnetic Member]
FIG. 12 shows a second modification of the magnetic member, and is an enlarged front view showing the magnetic member and its surroundings seen from the back side of the closed door. FIG. 13 is an enlarged front view showing the magnetic member of the second modified example and its surroundings as seen from the back side of the opened door. In FIGS. 12 and 13, the packing 34, the washer 57, the base plate 59, and the elastic member 60 are not shown for convenience of explanation.

  12 and 13, the magnetic member 52 ″ of the second modification is a further modification of the magnetic member 52 ′ of the first modification, and has an extension portion 52d on the opening / closing base end side of the long hole 52c. When the opening / closing door 31 is closed when the end of the opening / closing tip side of the magnetic member 52 ″ has fallen off from the protruding member 56A (the state indicated by the two-dot chain line in FIG. 13), the extension 52d It is formed so as to obstruct the closing of the opening / closing door 31 by being bitten between the opening / closing door 31 and the housing body 21 during the opening of the door.

  For example, in the present modification, the length D from the elongated hole 52c to the tip of the extension 52d is such that the end on the opening / closing tip side of the magnetic member 52 ″ is removed from the protruding member 56A and the upper end of the door 31 is opened. Also, in this modification, the opening / closing base end side end (extension portion 52d) of the magnetic member 52 ″ obstructs the closing of the opening / closing door 31. For example, when the magnet 51 and the magnetic member 52 ″ are disposed on the lower side of the housing 20 and the lower side of the opening / closing door 31, the opening / closing door 31 is closed by the end of the opening / closing front end of the magnetic member 52 ″. May be inhibited.

  As described above, according to the magnet switch 50 including the magnetic member 52 ″ of the second modification, even if the end of the magnetic member 52 ″ on the opening / closing front end side is detached from the protruding member 56A, The extension 52d of the magnetic member 52 "is engaged between the opening / closing door 31 and the housing main body 21 during the closing of the door, thereby preventing the opening / closing door 31 from being closed. When the opening / closing door 31 is closed with the end of the opening / closing distal end side of the opening / closing tip falling off the protruding member 56 </ b> A, the magnet switch 50 prevents the opening / closing door 31 from being closed while detecting the opening of the opening / closing door 31. be able to.

  The magnetic members 52 ′ and 52 ″ of the first and second modified examples are supported on the open / close door 31 side with play S as in the magnetic member 52 of the present embodiment, but do not have play S. It may be fixed to the door 31. In this case, the elastic member 60 that presses the magnetic members 52 ′ and 52 ″ to the magnet 51 side is also unnecessary.

[Others]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 3 Central apparatus 4 Roadside radio | wireless communication apparatus 5 Traffic signal apparatus 5a Traffic signal light machine 5b Traffic signal controller 6 Vehicle 7 Car-mounted communication apparatus 8a Communication line 8b Communication line 9 Roadside router 10 Network network 11 Router 20 Case 21 Case main part 21a Opening Part 22 Inner door 22a Front surface 23 Hinge 24 Lock member 31 Opening / closing door 32 Hinge 33 Locking device 34 Packing 40 Communication module 50 Magnet switch (opening detection device)
51 Magnet 51a Suction surface 51b Front end 51e Long side 52 Magnetic member 52 'Magnetic member 52 "Magnetic member 52a Suction surface 52b Groove 52c Long hole 52d Extension 52e Long side 53 Bracket 53a Vertical plate 53b Horizontal plate 53c Front end 53d Screw hole 54 Holding member 54a Storage part 54b Gutter part 54c Insertion hole 55 Screw member 56A Screw member (projection member)
56A1 Head 56A2 Tool engaging groove 56A3 Screw part 56B Screw member 56B1 Head 56B2 Tool engaging groove 56B3 Screw part 57 Washer 58 Boss member 59 Base plate 60 Elastic member C Intersection D Length i1 Signal control information i2 Execution information i3 Road side Information transmitted by wireless communication equipment i4 Vehicle information L Distance R Road θ Inclination angle

Claims (9)

In a roadside wireless communication device configured to accommodate a communication module that performs wireless communication with an in-vehicle communication device inside a housing provided with an opening / closing door, one of the housing side and the opening / closing door side A magnet provided on the member on the side,
A magnetic member that is provided on a member on the other side of the casing side and the opening / closing door side, and that is attracted to the magnet in a state where the opening / closing door is closed;
When the opening / closing door is opened, the opening of the opening / closing door is detected by releasing the adsorption of the magnetic member and the magnet, and the opening detection device of the roadside wireless communication device,
At least one of the magnet and the magnetic member is formed in an elongated shape in a direction from the open / close base end side of the open / close door to the open / close front end side with the open / close door closed.
The magnet is provided in the casing or the opening / closing door, and from the closed state of the opening / closing door until the opening / closing door opens and the opening detection device detects the opening of the opening / closing door. An opening detection device for a roadside wireless communication device, comprising a protruding member that hides the open / close tip side.   The door opening detection device for a roadside wireless communication device according to claim 1, wherein the protruding member is a screw member.   The door detection device for a roadside wireless communication device according to claim 2, wherein the screw member is a special screw that is tightened using a special tool.   Of the magnet attracting surface and the attracted surface of the magnetic member, one surface is always inclined so as to protrude toward the other surface as it goes from the open / close base end side to the open / close distal end side. The opening detection apparatus of the roadside radio | wireless communication apparatus of any one of Claims 1-3.   The long side of the direction which goes to the said opening-and-closing front end side from the said opening-and-closing base end side in said at least one among the said magnet and a magnetic member is extended in any one of Claims 1-4. The opening detection apparatus of the roadside radio communication apparatus of description. The magnetic member is attached to the other member in a state having play in a direction perpendicular to the attracted surface of the magnetic member,
The door opening detection apparatus of the roadside radio communication apparatus of any one of Claims 1-5 further provided with the elastic member which is provided in the said other side member and presses the said magnetic member to the said magnet side. The housing has an inner door inside,
The door detection device for a roadside wireless communication device according to claim 6, wherein the casing-side magnet or magnetic member is attached to the inner door. The housing has an inner door that opens and closes in the same direction as the opening and closing direction of the opening and closing door,
The magnet or magnetic member on the housing side is attached to the inner door,
The protruding member is provided on the other side member, and the end of the magnetic member on the open / close front end side is hooked with the open / close door closed.
The magnetic member is configured such that when the magnet is released from being attracted while the opening / closing door is being opened, the end portion falls off the protruding member and cannot be attracted to the magnet. The opening detection apparatus of the roadside radio | wireless communication apparatus of any one of Claims 1-6.   The end of the magnetic member on the open / close base end side or the end on the open / close front end side is in the middle of closing when the open / close door is closed with the end on the open / close front end side falling off the protruding member. The door opening detection device for a roadside wireless communication device according to claim 8, wherein the door opening detection device is formed so as to bite between the opening and closing door and the housing to inhibit the closing of the opening and closing door.

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