JP6662703B2 - Cab-over type vehicle - Google Patents

Description

  The present invention relates to a cab-over type vehicle equipped with an electronic key system.

  2. Description of the Related Art Conventionally, an electronic key system that locks and unlocks a door handle through wireless communication between an in-vehicle device mounted on a vehicle and a portable device carried by a driver of the vehicle has been put into practical use (for example, Patent Document 1). 1). In such an electronic key system, the in-vehicle device transmits a request signal through a transmission antenna, and the portable device having received the request signal transmits a response signal including its own authentication number to the in-vehicle device. The in-vehicle device receives the response signal through the receiving antenna, and checks the authentication number included in the response signal. The in-vehicle device unlocks the door handle when the authentication number is registered in the in-vehicle device when the door handle is locked, and when the response signal is not received, or when the authentication number of the portable device is in the in-vehicle device. If not registered, keep the door handle locked.

JP 05-106376 A

  By the way, the transmission antenna is installed near a door handle in a vehicle such as a general passenger car. However, in a cab-over type vehicle such as a lorry, a door handle is installed at a higher position than a passenger car. Will also be higher. Therefore, it is desired to secure an appropriate detection area in a cab-over type vehicle.

  An object of the present invention is to provide a cab-over type vehicle equipped with an electronic key system capable of securing an appropriate detection area for a portable device.

  A cab-over type vehicle that solves the above-mentioned problem is a cab-over type vehicle equipped with an electronic key system including an on-vehicle device having a transmission antenna for transmitting a request signal and a portable device for transmitting a response signal when receiving the request signal. The cab-over type vehicle includes a rear arch that is bridged over a pair of side frames forming a body frame, and a cab is removably connected to the rear arch. And a pair of brackets for supporting the cab, and the transmitting antenna is attached to a bracket located on the driver's seat side among the pair of brackets.

  According to the above configuration, the transmission antenna is attached to the bracket that supports the cab on the side of the rear arch. Therefore, even in a cab-over type vehicle having a door handle at a position higher than that of a general passenger car, it is possible to secure an appropriate detection area of the portable device. In addition, even if the cab is tilted, the detection area of the portable device does not significantly change.

  In the cab-over type vehicle having the above-described configuration, the bracket includes an upper surface wall extending toward a side of the vehicle, a front wall extending downward from the vehicle from both side edges of the upper surface wall, and arranged in a front-rear direction of the vehicle. It is preferable that the transmission antenna includes a rear wall and has a shape in which the side of the vehicle is open, and the transmitting antenna is located at a position closer to the rear wall than to the front wall.

  According to the above configuration, the transmission antenna attached to the bracket is located farther from the cab in the front-rear direction of the vehicle. Thereby, the influence of the cab on the detection area of the portable device can be reduced.

In the cab-over type vehicle having the above configuration, it is preferable that the transmitting antenna is located below the upper wall.
According to the above configuration, it is possible to prevent rainwater from directly falling on the transmission antenna. As a result, the waterproofness required for the transmitting antenna can be reduced.

In the cab-over type vehicle having the above configuration, it is preferable that the transmission antenna has a bar antenna extending toward a side of the vehicle.
According to the above configuration, the directivity of the transmitting antenna can be effectively used in setting the detection area on the side of the vehicle.

  In the cab-over type vehicle having the above-described configuration, the transmission antenna is attached to the bracket via an attachment member fastened to the bracket by a fastening member, and the attachment member is centered on the fastening member. It is preferable to have a regulation part which regulates rotation of the fastening member in the fastening direction by engagement with the bracket.

  According to the above configuration, the rotation of the mounting member due to the fastening of the fastening member is restricted. Thereby, the mounting member can be firmly fastened to the bracket. As a result, the attachment member can be more reliably fixed to the bracket. Further, the positioning of the transmitting antenna with respect to the bracket can be easily performed.

FIG. 1 is a block diagram showing a schematic configuration of an electronic key system. FIG. 1 is a perspective view schematically showing a rear perspective structure of a cab-over type vehicle according to an embodiment, with some components omitted. FIG. 2 is a perspective view schematically showing a perspective structure of a driver side bracket and an antenna / buzzer unit before attachment. The figure which shows typically the structure of the antenna / buzzer unit seen from the back of the vehicle. The figure which shows typically the structure of the antenna / buzzer unit seen from the underside of the vehicle. The figure which shows typically the structure of the antenna / buzzer unit seen from the front of a vehicle. It is a figure which shows the detection area set based on an example of the measurement result of an electric field intensity, (a) The figure which shows the detection area in 300 mm above ground, (b) The figure which shows the detection area in 800 mm above ground, (c) FIG. 3) is a diagram showing a detection area at a ground height of 1100 mm.

One embodiment of a cab-over type vehicle will be described with reference to FIGS. First, an outline of an electronic key system will be described with reference to FIG.
As shown in FIG. 1, the electronic key system 10 includes, for example, a portable device 12 carried by a driver 11 and a vehicle-mounted device 21 mounted on a vehicle 20. The in-vehicle device 21 includes a transmitting antenna 22 located outside the cab, a receiving antenna 23 located inside the cab, and a control device 24 to which the transmitting antenna 22 and the receiving antenna 23 are connected.

  The control device 24 transmits, from the transmission antenna 22, a request signal S1 in the LF (Low Frequency) band for requesting a response signal including an authentication number to the portable device 12. The portable device 12 that has received the request signal S1 transmits a response signal S2 in an RF (Radio Frequency) band including its own authentication number to the vehicle-mounted device 21. The control device 24, which has received the response signal S2 through the receiving antenna 23, checks the authentication number included in the response signal S2, and when the authentication number is a number registered in the control device 24, Is detected. The control device 24 that has detected the portable device 12 unlocks the door handle by outputting an unlock signal to the vehicle ECU 25, and permits the start of the engine by outputting a permission signal to the engine ECU 26.

  On the other hand, when the portable device 12 is no longer detected after the engine is stopped, for example, when the driver 11 leaves the vehicle 20, the control device 24 outputs a locking signal to the vehicle ECU 25 to lock the door handle, and the engine ECU 26 Outputs a prohibition signal to prohibit engine start. The control device 24 keeps the door handle locked when the response signal S2 to the request signal S1 is not received or when the authentication number of the received response signal S2 is a number not registered in the control device 24. .

  The control device 24 outputs a predetermined control signal to the buzzer 27 when the door handle is unlocked, and emits a notification sound indicating that the door handle is unlocked through the buzzer 27. Further, the control device 24 outputs a predetermined control signal to the buzzer 27 when the door handle is locked, and emits a notification sound indicating that the door handle is locked through the buzzer 27.

As shown in FIG. 2, the vehicle 20 on which the above-described electronic key system 10 is mounted is a cab-over type vehicle, and includes a chassis 30 and a cab 40.
The chassis 30 includes a vehicle body frame 33 including a pair of side frames 31L and 31R extending in the front-rear direction of the vehicle and a plurality of cross members 32 bridged between the pair of side frames 31L and 31R. The chassis 30 is configured by attaching drive wheels 34 and an engine (not shown) to the body frame 33.

  The cab 40 has a door 41 for opening and closing a driver's seat. The door 41 is provided with a door handle 42, which is operated when the door 41 is opened from outside the vehicle, at a position close to the rear of the vehicle 20. The cab 40 is connected to the chassis 30 so as to be tiltable to the front of the vehicle 20, and is connected to the rear arch 35 fixed to the body frame 33 via a lock mechanism (not shown) so as to be disengageable. I have.

  The rear arch 35 is bridged between the pair of side frames 31L and 31R, and is fixed to each of the pair of side frames 31L and 31R and extends in the vertical direction of the vehicle 20. 35L and 35R, and a member upper 35U which is bridged over the distal end. Each of the pair of member sides 35L, 35R has a support member 45L, which is formed at the rear end 44L, 44R of the cab 40, at a position above the side frames 31L, 31R and lower than the door handle 42. Brackets 36L and 36R that support the 45R via a buffer component such as a cab mount are fixed. The pair of brackets 36L and 36R have the same structure, and the bracket 36R is located on the driver's seat side and the bracket 36L is located on the passenger seat side.

  As shown in FIG. 3, the bracket 36 </ b> R extends from the member side 35 </ b> R of the rear arch 35 to the side of the vehicle 20 and has an upper wall 37 </ b> T on which cushioning parts (not shown) are installed. And a front wall 37F and a rear wall 37B which extend downward and face each other in the front-rear direction of the vehicle. The bracket 36R is fixed to the member side 35R of the rear arch 35 by welding the base ends of the upper wall 37T, the front wall 37F, and the rear wall 37B. It is open. An antenna / buzzer unit 50 is attached to the rear wall 37B of the bracket 36R located on the driver's seat side by fastening a fastening member 48 to the fastening hole 38.

The antenna / buzzer unit 50 will be described with reference to FIGS.
4 to 6, the antenna / buzzer unit 50 includes the transmission antenna 22, the buzzer 27, and the attachment member 51 to which the transmission antenna 22 and the buzzer 27 are attached. The mounting member 51 is an injection-molded product made of resin, and has an insertion hole 53 through which a fastening member 48 is inserted at a corner of a mounting substrate 52 having a flat plate shape. The attachment member 51 is fixed to the rear wall 37B of the bracket 36R from the rear side of the vehicle 20 by fastening the fastening member 48 passing through the insertion hole 53 to the fastening hole 38 of the rear wall 37B.

  The mounting member 51 has a plurality of snap engagement pieces 54 integrally formed on the peripheral edge of the mounting board 52. These snap engagement pieces 54 extend toward the rear side of the vehicle 20 and snap-engage with the engagement portions 56 of the buzzer cover 55. The buzzer cover 55 is a resin injection-molded product, and covers the buzzer 27 attached to the attachment board 52.

  The mounting member 51 has a passage forming portion 57 formed integrally with the mounting substrate 52. The passage forming portion 57 has a passage 59 through which a harness 58 provided with a power supply line, a control signal line, and the like connected to the buzzer 27 passes.

  The attachment member 51 has an antenna attachment portion 60 to which the transmission antenna 22 is attached. The antenna mounting portion 60 is formed integrally with the mounting substrate 52 on a surface opposite to the mounting surface of the buzzer 27. The antenna mounting portion 60 has a bent shape including a mounting piece 61 to which the transmitting antenna 22 is mounted, and a gap forming piece 62 that forms a gap between the mounting board 52 and the mounting piece 61. The attachment piece 61 has an attachment hole 63 for the transmission antenna 22 and is arranged to extend toward the side of the vehicle 20. The attachment hole 63 has an elliptical shape whose major axis is the longitudinal direction of the attachment piece 61.

  The mounting member 51 has a restricting portion 64 that is a protruding piece that protrudes from the mounting substrate 52 toward the front of the vehicle 20 near the passage forming portion 57. The restricting portion 64 is formed integrally with the mounting substrate 52, and rotates the mounting member 51 in the fastening direction (clockwise) of the fastening member 48 by contacting the lower end edge 37Bb of the rear wall 37B of the bracket 36R. Regulate.

  The transmitting antenna 22 has a resin antenna case 70 housing a bar antenna for transmitting the request signal S1, and a connector 72 to which a harness 71 provided with a power supply line and the like is connected. In the antenna case 70, the same direction as the bar antenna is set in the longitudinal direction, and a resin clamp 73 that is snap-fitted to a mounting hole 63 formed in the antenna mounting portion 60 is fixed. The transmitting antenna 22 is attached to the attachment piece 61 of the attachment member 51 by the snap engagement of the clamp 73 engaging the attachment hole 63.

  The above-described antenna / buzzer unit 50 is assembled by attaching the transmitting antenna 22, the buzzer 27, and the buzzer cover 55 to the attachment member 51. The antenna / buzzer unit 50 is attached to the bracket 36R as follows.

  First, in a state where the transmitting antenna 22 is arranged on the front side of the vehicle 20, the positioning of the fastening hole 38 formed in the rear wall 37B of the bracket 36R and the insertion hole 53 formed in the mounting board 52 is performed. Then, the fastening member 48 is fastened in a state where the regulating portion 64 is abutted against the lower edge 37Bb of the rear wall 37B of the bracket 36R. Thereby, the antenna / buzzer unit 50 is attached to the bracket 36R. When the antenna / buzzer unit 50 is attached to the bracket 36R, the transmission antenna 22 is disposed between the cab 40 and the body 80 as shown in FIGS. 7 (a) to 7 (c). As shown, it is disposed below the upper surface wall 37T, which is inside the front wall 37F and the rear wall 37B, and closer to the rear wall 37B than the front wall 37F of the bracket 36R. The transmitting antenna 22 extends toward the side of the vehicle 20 so as to follow the lower end edge 37Bb of the rear wall 37B, and is held in a state in which a portion located closer to the side of the vehicle 20 is located higher. It is preferable that the transmitting antenna 22 fixed to the bracket 36R be installed at a position where the ground height H is 670 mm to 1500 mm.

  With reference to FIGS. 7A to 7C, an example of a result of an experiment performed on a detection area that is a region that can be detected by the portable device 12 will be described. FIGS. 7A to 7C show a mobile device in which the electric field intensity is measured at each position on the side of the vehicle 20 using the actual vehicle 20 on which the transmitting antenna 22 is installed, and the mobile phone is set based on the measured values. FIG. 3 is a view showing a detection area 76 of the machine 12. The transmitting antenna 22 was installed at a height H above the ground of 680 mm. The side of the grid in the drawing is 400 mm. An area 77 surrounded by a two-dot chain line in the figure indicates a range with a radius of 500 mm centered on the door handle 42.

  7A shows a detection area 76 at a ground height H = 300 mm, FIG. 7B shows a detection area 76 at a ground height H = 800 mm, and FIG. 7C shows a detection area at a ground height H = 1100 mm. 76 is shown. As shown in FIGS. 7A to 7C, it was confirmed that a detection area 76 having a radius of about 1 m centered on the door handle 42 was secured at each ground clearance.

The operation of the cab-over type vehicle having the above configuration will be described.
In the vehicle 20 described above, the transmitting antenna 22 is mounted via a mounting member 51 to a bracket 36R connected to the rear arch 35 at a position lower than the door handle 42. For this reason, even in the vehicle 20 having the door handle 42 at a position higher than a general passenger car, it is possible to secure an appropriate detection area 76 of the portable device 12 as shown in FIGS. it can.

According to the cab-over type vehicle of the above embodiment, the following effects can be obtained.
(1) By attaching the transmitting antenna 22 to the bracket 36R connected to the rear arch 35 at a position lower than the door handle 42, it is possible to secure an appropriate detection area 76 of the portable device 12 in the vehicle 20.

  (2) Here, the transmitting antenna is disposed below the cab floor, for example, inside the wheel arch 47 (see FIG. 2) or in a locker installed between the cab floor and the wheel arch 47. Is also possible. However, when the transmission antenna is disposed inside the wheel arch 47, the transmission antenna is required to have high waterproofness due to the rainwater rolled up by the driving wheel 34 falling, and mud or the like adhered to the inside of the wheel arch 47. There is a possibility that the detection area may be affected by iron powder contained in the detection area. Further, when the portable device is disposed in the locker, the detection area of the portable device may be changed according to the position of the tool, affected by the metal tool stored in the locker.

  In this regard, in the vehicle 20 having the above-described configuration, the rainwater that the drive wheels 34 roll up does not fall on the transmission antenna 22, so that the waterproofness required for the transmission antenna can be reduced. In addition, the radio wave transmitted by the transmission antenna 22 is less likely to be affected by iron powder contained in a metal tool in the locker or mud attached to the wheel arch 47. That is, according to the above configuration, it is possible to secure a stable detection area of the portable device 12 while suppressing the waterproofness required of the transmission antenna 22.

  (3) When a transmitting antenna is mounted inside the above-mentioned rocker or wheel arch, the transmitting antenna is housed in a closed space where the temperature is easily maintained at a high temperature under the influence of radiant heat of the engine. Therefore, the transmission antenna is also required to have high heat resistance. In this respect, according to the above-described configuration, since the transmitting antenna 22 is not housed in the closed space, heat is prevented from being trapped around the transmitting antenna 22. That is, since the heat resistance required of the transmission antenna 22 is suppressed, the degree of freedom regarding the transmission antenna 22 itself can be improved.

  (4) The space for disposing the transmitting antenna can be larger than when the antenna is disposed near the door handle or under the floor of the cab. Therefore, the degree of freedom regarding the transmitting antenna itself is increased, and it becomes easier to set a desired detection area on the side of the vehicle 20.

  (5) When a transmission antenna is attached to the cab, if the cab is tilted, the detection area of the transmission antenna moves with the cab. Thus, for example, even before the cab tilts, the cab may fall within the detection area, but after the cab tilt, the cab may fall outside the detection area. In this regard, in the above-described configuration, even if the cab 40 is tilted, the detection area 76 does not significantly change. Therefore, regardless of the tilt of the cab 40, a fixed detection area 76 can be secured.

  (6) When the transmission antenna is attached to the cab, additional work may be required on the components of the cab in order to route the harness connected to the transmission antenna. In this regard, according to the above configuration, the harness 71 connected to the transmission antenna 22 is routed outside the cab 40. Therefore, additional processing for disposing the transmitting antenna 22 with respect to the constituent members of the cab 40 can be reduced.

  (7) The transmission antenna 22 is located at a position closer to the rear wall 37B than the front wall 37F. That is, transmission antenna 22 is arranged at a position farther from cab 40 in the front-rear direction of vehicle 20. Thereby, the space where the cab 40 is interposed between the transmitting antenna 22 and the space near the door 41 can be reduced. As a result, the influence of the cab 40 on the radio wave intensity of the request signal S1 reaching the space near the door 41 can be reduced, and the detection area 76 near the door 41 can be secured more reliably.

  (8) Since the transmitting antenna 22 is installed below the upper wall 37T of the bracket 36R, it is possible to prevent rainwater from directly falling on the transmitting antenna 22. As a result, the waterproofness required of the transmission antenna 22 can be further suppressed.

  (9) Since the transmission antenna 22 has the bar antenna extending toward the side of the vehicle 20, the directivity of the transmission antenna 22 is required to transmit the request signal S1 toward the space on the side of the vehicle 20. It can be used effectively. As a result, it is possible to suppress the power consumption in obtaining a detection area approximately equal to the detection area 76 shown in FIGS. 7A to 7C.

  (10) In the attachment member 51 for attaching the transmission antenna 22 to the bracket 36R, the rotation of the fastening member 48 in the fastening direction about the fastening member 48 is regulated by the regulating portion 64. Therefore, since the mounting member 51 can be firmly fastened to the bracket 36R, the mounting member 51 can be more securely fixed to the bracket 36R. Further, the positioning of the transmitting antenna 22 with respect to the bracket 36R can be easily performed.

The above-described embodiment can be implemented with appropriate modifications as described below.
The restricting portion 64 includes, in addition to the protruding piece, one or more reinforcing ribs disposed at a corner formed by the mounting board 52 and the protruding piece on the side opposite to the fastening direction of the fastening member 48 with respect to the protruding piece. Is preferred. According to such a configuration, the mechanical strength of the regulating portion 64 is enhanced, so that the fastening by the fastening member 48 can be performed more firmly. Thus, it is possible to prevent the detection area 76 from changing due to the loosening of the fastening member 48. The restricting portion 64 only has to restrict the rotation of the mounting member 51 in the fastening direction of the fastening member 48, and may be configured by projecting pieces formed at a plurality of locations so as to follow the shape of the bracket.

  When the transmitting antenna 22 has a bar antenna, the extending direction of the transmitting antenna 22 is not limited to the side of the vehicle 20 and may be, for example, above or below the vehicle 20. Further, transmission antenna 22 may be held such that a portion closer to the distal end portion is located in front of vehicle 20. According to such a configuration, for example, even when the door handle 42 and the bracket 36R are separated, the directivity of the transmission antenna 22 can be effectively used.

The transmission antenna 22 is not limited to a bar antenna, and may be, for example, a dipole antenna.
The transmitting antenna 22 only needs to be attached to the bracket 36R, and may be located not only below the upper wall 37T but further behind the rear wall 37B. Even in such a configuration, the transmission antenna 22 is disposed at a position closer to the rear wall 37B than the front wall 37F.

The transmitting antenna 22 only needs to be attached to the bracket 36R, and may be arranged at a position closer to the front wall 37F than to the rear wall 37B.
The antenna / buzzer unit 50 may be attached to at least the bracket 36R on the driver's seat side, and may be attached to the bracket 36L on the passenger seat side.

  The portable device 12 only needs to be mounted on a device that can be carried by the driver, and may be built in a mobile phone or a wristwatch, for example, or may have a card-type shape.

  DESCRIPTION OF SYMBOLS 10 ... Electronic key system, 11 ... Driver, 12 ... Portable equipment, 20 ... Vehicle, 21 ... In-vehicle equipment, 22 ... Transmission antenna, 23 ... Receiving antenna, 24 ... Control device, 25 ... Vehicle ECU, 26 ... Engine ECU, 27 buzzer, 30 chassis, 31L, 31R side frame, 32 cross member, 33 body frame, 34 drive wheel, 35 rear arch, 35L, 35R member side, 35U member upper, 36L, 36R Bracket, 37B: rear wall, 37F: front wall, 37T: upper wall, 38: fastening hole, 40: cab, 41: door, 42: door handle, 44L, 44R: rear end, 45L, 45R: support member 47, wheel arch, 48, fastening member, 50, antenna / buzzer unit, 51, mounting member, 52, mounting substrate, 53, Through hole, 54: snap engaging piece, 55: buzzer cover, 56: engaging part, 57: passage forming part, 58: harness, 60: antenna mounting part, 61: mounting piece, 62: gap forming piece, 63 ... Attachment hole, 64: regulating part, 70: antenna case, 71: harness, 72: connector, 73: clamp, 76: detection area, 80: mounted object.

Claims (5)

A cab-over type vehicle equipped with an electronic key system including a vehicle-mounted device having a transmission antenna for transmitting a request signal and a portable device for transmitting a response signal when receiving the request signal,
The cab-over type vehicle,
A rear arch which is hung over a pair of side frames constituting the body frame and the cab is removably connected;
A pair of brackets fixed to the rear arch and supporting the cab on the side of the vehicle with respect to the rear arch,
The transmission antenna,
A cab-over type vehicle attached to a bracket located on the driver's seat side of the pair of brackets. The bracket includes an upper wall extending toward the side of the vehicle, a front wall and a rear wall extending downward from the vehicle from both side edges of the upper wall and arranged in the front-rear direction of the vehicle. It has a shape whose sides are open,
The cab-over type vehicle according to claim 1, wherein the transmitting antenna is located at a position closer to the rear wall than the front wall. The cab-over type vehicle according to claim 2, wherein the transmission antenna is located below the upper wall. The cab-over type vehicle according to any one of claims 1 to 3, wherein the transmission antenna includes a bar antenna extending toward a side of the vehicle. The transmission antenna is attached to the bracket via an attachment member fastened by a fastening member to the bracket,
The cab-over according to any one of claims 1 to 4, wherein the attachment member has a regulating portion that regulates rotation of the fastening member around the fastening member in a fastening direction by engagement with the bracket. Type vehicle.