JP2012201165A - Large dump truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a large dump truck capable of sharply capturing an image of a driver's face in the large dump truck.SOLUTION: A self-traveling type large dump truck includes a body and a cab which is located in a front upper part of the body and placed close to one side of a vehicle width direction. In the cab, there are provided a driver seat on which a driver sits down forward, a handle which is operated rotationally at a front position of the driver seat, and an infrared camera 21 which is disposed in front of the handle and close to another side of the vehicle width direction from a rotation center of the handle.

Description

  The present invention relates to a large dump truck, for example, a large dump truck used in a mine or the like.

  2. Description of the Related Art Conventionally, a camera device for capturing a driver's face image in a driver's room such as a truck or a bus is known (see, for example, Patent Document 1). Since the driver of the truck or bus faces the front while sitting on the seat, the camera device is placed in front of the driver's seat and steering wheel and in front of the driver, and is photographed by the camera device. From the face image thus obtained, for example, the degree of blinking is determined, and it is detected that the driver is falling asleep.

  By the way, in a large dump truck for mining work as a work vehicle, the vehicle width is much larger than the vehicle width assumed in Patent Document 1 and the like, and the vehicle height is also significantly higher. In recent years, even in such a large dump truck, there is a case in which a device for preventing a driver navigating in a cab is provided.

JP 2008-189230 A

  However, if a driver of a large dump truck is photographed using a conventional camera device, a face image cannot be accurately captured, and there is a problem that the reliability of dozing detection is reduced. This is because conventional trucks and buses are vehicles that travel on ordinary roads, and are only small vehicles compared to large dump trucks used in mines, etc., so the driving conditions specific to large dump trucks are completely considered. It is thought that it is not.

  An object of the present invention is to provide a large dump truck that can clearly photograph a driver's face image.

  A large-sized dump truck according to a first aspect of the present invention is a body, a cab that is placed on one side in the vehicle width direction at the front upper part of the body, and a vessel that is placed on the rear upper part of the body. In the cab, the driver's seat in which the driver is seated facing forward, the handle that is rotated at the front position of the driver's seat, the front of the handle, and the handle And an imaging device arranged nearer to the other side in the vehicle width direction than the center of rotation.

In the large dump truck according to a second aspect of the present invention, the body is provided with a ladder for moving up and down to the cab, and the imaging device images the driver at an elevation angle.

  In the large dump truck according to a third aspect of the present invention, the cab is located in front of the handle and on both sides in the vehicle width direction with respect to the handle, and at least a part of the irradiation light is disposed outside the handle. At least a pair of left and right illumination devices that pass through and irradiate the driver's face is provided.

  In a large dump truck according to a fourth aspect of the present invention, a dash cover that constitutes a dashboard disposed in front of the handle is provided in the cab, and the dash cover has a predetermined length along the vehicle width direction. Both sides of a support member having a fixed shape are fixed, and both the imaging device and the illumination device are supported by the support member.

  In the large dump truck according to a fifth aspect of the invention, the imaging device is supported by the support member via an imaging position adjusting means provided to adjust the imaging position, and the illumination device is provided to adjust the irradiation position. It is supported by the support member via the irradiation position adjusting means.

  In the large dump truck according to a sixth aspect of the invention, the support member is provided with a pedestal to which the imaging position adjusting means is detachably attached and a pedestal to which the irradiation position adjusting means is detachably attached. Features.

  As shown in FIG. 8, in the large dump truck 1 having a significantly large vehicle width, the cab 3 on which the driver's seat is provided is on one side with respect to the vehicle width center C in the vehicle width direction, that is, the shoulder on the opposite side. It is arranged close to the S side. This is to make it possible to easily confirm the distance L1 to the road shoulder S even when the vehicle width is large when traveling on a large dump truck 1 on a mine road that does not have a center line. By traveling while confirming, the distance L2 between the large dump trucks 1 having a large vehicle width can be ensured and the vehicle body can be in contact with the rocks and embankments of the shoulder S that are not sufficiently maintained. It is preventing.

  In such a large dump truck 1, the cab 3 is arranged close to the shoulder S, so that the position of the driver on the large dump truck 1 and the position of the driver on a truck or bus traveling on a general road Are very different. As a result, the driver's line of sight of the large dump truck 1 is directed from the shoulder S side toward the virtual center line CL (FIG. 8), and the mine road on which the large dump truck 1 with a large vehicle width travels. Since the road width is too large to be compared with general roads, in order to maintain the line of sight, the driver will turn the face direction itself toward the center line CL with respect to the front.

  As described above, as a result of earnest investigation of the unique situation in the large dump truck 1, according to the inventors of the present invention, the face of the driver who is driving the large dump truck 1 is in front of the seating position. For this reason, with conventional camera devices that are placed in front of the driver, the driver's face image cannot be clearly captured, and the driver's detection of falling asleep is reduced. I figured out what to do.

  That is, in the case where the cab 3 is arranged close to one side in the vehicle width direction, for example, the side of the road shoulder S, as in the case of a large dump truck 1 having a significantly large vehicle width, such a large dump truck 1 When driving on a wide road, the driver's posture in the cab 3 is facing the front, but the driver's face is not the front, but the center line CL (actual There is a tendency to face the other side in the vehicle width direction.

  Therefore, based on the above knowledge, as in the first aspect of the invention, the imaging device is arranged closer to the other side in the vehicle width direction than the center of rotation of the steering wheel in front of the driver. Is taken from the front by the imaging device, and the photographing can be made clear and the reliability of the detection of falling asleep can be improved.

  Further, since the cab of the large dump truck is arranged at a high position so as to be moved up and down using a ladder, the driver who is driving looks down on the road from the high place. Therefore, as in the second aspect of the invention, if the driver is imaged at an elevation angle by the imaging device, the driver's downward and downward face can be clearly imaged, and the dozing determination rate can be further improved.

  According to the third aspect of the present invention, when the driver's face is photographed, the illumination device that irradiates the face from the left and right is provided, so that the photographing can be made clearer. Moreover, since the illumination from the illumination device is performed through the outside of the handle, the shadow of the handle is not applied to the face, and more reliable illumination and photographing can be realized.

  According to the fourth aspect of the invention, since both sides of the support member having a predetermined length along the vehicle width direction are firmly fixed to the dash cover, it is possible to sufficiently secure the rigidity of the support member, and the support member can be used alone during traveling. Therefore, the imaging device and the illumination device can be favorably supported without being vibrated or shaken, and the driver's face can be reliably handled.

  According to the fifth invention, since the imaging device and the illumination device are supported by the support member via the imaging position adjustment unit and the irradiation position adjustment unit, respectively, even if the face position changes due to a difference in the height of the driver, By using each adjusting means, the imaging position and the irradiation position can be easily adjusted according to the position of the face of the driver seated on the driver's seat, and the usability can be improved.

  According to the sixth aspect of the present invention, the support member is provided with a pedestal, and each position adjusting means is detachably attached to such a pedestal. The corresponding position adjustment means can be exchanged. Therefore, it is possible to prevent a problem that the imaging means and the illumination means are to be exchanged for new specifications but cannot be properly attached to the original position adjusting means.

1 is a perspective view showing an entire large dump truck according to an embodiment of the present invention. The top view which shows the inside of a cab. The whole perspective view which shows arrangement | positioning of the supporting member on a dash cover, an infrared camera, and an infrared lamp. FIGS. 3A and 3B are enlarged views showing the infrared camera shown in FIG. 2, in which FIG. 3A is a diagram in which an infrared camera is placed on a pedestal, and FIG. 3B is a diagram in which the infrared camera is placed on a pedestal via a spacer. FIGS. 3A and 3B are enlarged views showing the infrared lamp shown in FIG. 2, wherein FIG. 3A is a diagram in which the infrared lamp is placed on a pedestal, and FIG. 3B is a diagram in which the infrared lamp is placed on a pedestal via a spacer. It is a figure which shows the imaging area and irradiation area | region with respect to the driver | operator of an infrared camera and an infrared lamp, (A) is a top view, (B) is a side view. The perspective view which shows the modification of arrangement | positioning of the supporting member on a dash cover, an infrared camera, and an infrared lamp. The schematic diagram for demonstrating the investigation condition which resulted in creating this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the following description, the front / rear / left / right direction refers to the same direction as the front / rear / left / right direction when the driver is seated on the driver's seat 301 shown in FIG. The left-right direction and the vehicle width direction are synonymous.

A large dump truck 1 shown in FIG. 1 includes a body 2 having a frame structure, and a cab 3 is mounted on the front upper portion of the body 2. A vessel 4 for loading a load is provided.
Four traveling wheels 5 are attached to the body 2 in front, rear, left and right. The traveling wheel 5 is driven by a driving force from a driving source (not shown).
On the front surface of the body 2, ladders 7 are provided on the left and right for moving up and down between the cab 3 disposed at a high place and the ground. A handrail 8 is attached to a walkable area or the like provided around the cab 3 in the upper part of the body 2, and a side mirror is provided on the handrail 8 at positions corresponding to both ends in the vehicle width direction (the left-right direction of the vehicle). 9 is attached.

  The cab 3 is placed at the front upper part of the body 2 and is placed close to the left end side in the vehicle width direction (the left-right direction of the vehicle), and inside the driver is seated as shown in FIG. A seat 301 is arranged on the left side, and an auxiliary seat 303 is arranged side by side on the right side of the driver seat 301. That is, in the large dump truck 1, the driver's seat 301 is arranged further to the left in the cab 3 that is moved to the left in the vehicle width direction. In this way, in the large dump truck 1 according to the present embodiment that travels in the left lane when facing each other, the driver can surely confirm the left shoulder of the road and can easily travel while confirming. In the cab 3, a handle 302 is disposed in front of the driver's seat 301, and a vessel lever 304 that tilts the vessel 4 is provided between the driver's seat 301 and the auxiliary seat 303.

  Further, in the cab 3 of the present embodiment, a ROPS (Roll Over Protective Structure) frame 307 having a pair of left and right support columns 305 on the front side and a pair of left and right support columns 306 is employed. Further, the cab 3 is mounted on the frame of the body 2 via a pair of left and right cab mounts 308 provided on the front side of the lower surface and a pair of left and right cab mounts 309 provided on the lower back side.

  The vessel 4 is placed on the rear upper part of the body 2 via a hoist cylinder (not shown), and is attached to the body 2 so as to be rotatable about the lower side as a rotation center by expanding and contracting the hoist cylinder. .

  As shown in FIGS. 3 to 6, in the cab 3, a dashboard 6 is provided in front of the driver's seat 301 and the handle 302, and an upper side of the dashboard 6 is configured with a synthetic resin dash cover 61. . The dash cover 61 includes an infrared camera 21 as an imaging device, two infrared lamps 22 and 23 as a lighting device, a warning panel 24 that informs the driver of his / her dozing status, and a predetermined length along the vehicle width direction. A support member 10 is installed to support them.

  First, the support member 10 is formed of a metal pipe, and includes a horizontal portion 11 extending in the horizontal direction along the vehicle width direction and a pair of bent downwards from both ends of the horizontal portion 11 toward the dash cover 61. A pair of standing portions 12A and 12B and a pair of protrusions protruding forward from a position inside the standing portions 12A and 12B in the vicinity of the left and right ends of the horizontal portion 11 and bent downward toward the dash cover 61 Leg portions 13 </ b> A and 13 </ b> B, and disposed at a position lower than the upper end 302 </ b> A of the handle 302.

The horizontal length of the horizontal portion 11 and the standing portions 12A and 12B is longer than the diameter of the handle 302, and when viewed from the seated driver, the end of the horizontal portion 11 and the standing portion 12A. , 12B are positioned on the left and right sides of the handle 302.
The bottom portions of the standing portions 12A and 12B are attached to the dash cover 61, and similarly the bottom portions of the leg portions 13A and 13B are attached to the dash cover 61. Accordingly, the horizontal portion 11 is disposed at a position spaced a predetermined distance above the upper surface 62 of the dash cover 61 via the standing portions 12A and 12B and the leg portions 13A and 13B. A bolt hole is provided at the center of each bottom portion, and the bottom portion is fixed on the dash cover 61 by a bolt inserted from the back side of the dash cover 61.

A pedestal 14 on which the infrared camera 21 is placed is provided on the right side of the center in the longitudinal direction of the horizontal portion 11, that is, on the right side of the rotation center P of the handle 302.
The pedestal 14 includes a horizontal upper surface portion 141, a left side portion 142, a right side portion 143, and a front surface portion 144, and the rear side is open. On the left side portion 142 and the right side portion 143, a substantially semicircular fitting portion 145 corresponding to the outer peripheral surface of the horizontal portion 11 is formed. The pedestal 14 is attached to the horizontal portion 11 by the fitting portion 145 being fitted to the outer peripheral surface of the horizontal portion 11 and being fixed by fixing means such as welding.
A horizontal plate-like left pedestal 15A and right pedestal 15B on which the infrared lamp 22 is placed are fixed to the left and right ends of the horizontal part 11 by fixing means such as welding. The tips of the pedestals 15A and 15B extend toward the standing portions 12A and 12B.

As shown in FIG. 4A, the infrared camera 21 is supported by a U-shaped bracket 31 as first imaging position adjusting means, and this bracket 31 is detachably attached to the pedestal 14 with a bolt or the like. It is attached.
Specifically, the bracket 31 includes a mounting portion 311 that is placed on the upper surface portion 141 of the base 14, and rising pieces 312 that are erected on both the left and right sides of the mounting portion 311. The infrared camera 21 is attached between the pair of upright pieces 312 in a floating state. At this time, the infrared camera 21 is rotatable in the direction of arrow A (vertical direction in FIG. 4A) with the pivotal portion of the side surface of the infrared camera 21 in the rising piece 312 as the rotation center. With this structure, the angle of the infrared camera 21 can be adjusted according to the position of the driver's face. The adjusted position is held, for example, by friction at the shaft support portion.

  Further, the mounting portion 311 is fixed to the base 14 with a pair of bolts 313. One of the bolt insertion holes 314 provided in the attachment portion 311 is an arc-shaped long hole. With this structure, the bracket 31 can be rotated in the direction of arrow B (left and right in FIG. 4A) with respect to the pedestal 14 with the bolt 313 inserted through the other bolt insertion hole as a rotation axis. The position of the infrared camera 21 can be adjusted according to the direction of the driver's face.

  Furthermore, as shown in FIG. 4B, a rectangular parallelepiped spacer 32 as a second imaging position adjusting means is interposed between the pedestal 14 and the bracket 31, thereby making the height position of the infrared camera 21 (FIG. 4). It is also possible to adjust the position in the middle / up / down direction according to the position of the driver's face.

  As shown in FIG. 6, the infrared camera 21 attached to the pedestal 14 via the bracket 31 is in front of the handle 302 positioned in front of the driver and on the right side of the rotation center P of the handle 302. They are placed close together and photographed at an elevation while looking up at the driver's face. However, since the cab 3 is arranged close to the left end side in the vehicle width direction, and the driver's seat 301 is also arranged close to the left side in the cab 3, the driver faces the right side. Therefore, the driver's face facing right is photographed from the front by the infrared camera 21 arranged on the right. In addition, since the cab 3 is located at a high place, the driver travels slightly downward so as to check on the road, so that the driver's face is more at an elevation angle from the lower side to the upper side. Photographed clearly.

  One infrared lamp 22 is located on the left side of the rotation center P of the handle 302, and the other infrared lamp 23 is located on the right side of the rotation center P of the handle 302.

As shown in FIG. 5A, the infrared lamp 22 is supported by a U-shaped bracket 33 as a first irradiation position adjusting means, and this bracket 33 is detachably attached to the left pedestal 15A by a bolt or the like. Is attached.
Specifically, the bracket 33 has a mounting portion 331 placed on the left pedestal 15 </ b> A and rising pieces 332 erected on both the left and right sides of the mounting portion 331, and floats upward from the mounting portion 331. In the state, the infrared lamp 22 is attached between the pair of rising pieces 332. At this time, it is possible to rotate in the arrow A direction (vertical direction in FIG. 5A) with the pivotal support portion of the infrared lamp 22 in the rising piece 332 as the rotation center. With this structure, the position of the infrared lamp 22 can be adjusted in accordance with the position of the driver's face, and the light irradiation angle can be adjusted. The adjusted position is held, for example, by the friction of the shaft support portion, similarly to the imaging position adjusting means.

Further, as shown in FIG. 5B, a rectangular parallelepiped spacer 35 as a second irradiation position adjusting means is interposed between the left pedestal 15A and the bracket 33, whereby the height position of the infrared lamp 22 (see FIG. 5B). The position in the vertical direction of 5) can be adjusted according to the position of the driver's face.
The infrared lamp 23 is also supported by a U-shaped bracket 34 as the first irradiation position adjusting means, and the manner of mounting on the right pedestal 15B is the same as that of the infrared lamp 22. Therefore, detailed description is omitted.

  As shown in FIG. 6, the infrared lamps 22 and 23 attached to the pedestals 15A and 15B via the brackets 33 and 34 are located in front of the driver 302 and in front of the driver 302. It is arranged to irradiate while looking up at the driver's face on both the left and right sides. Most of the light emitted from the infrared lamps 22 and 23 passes outside the handle 302 and is not blocked by the handle 302 and is emitted toward the driver's face to an extent sufficient for imaging. .

  The warning panel 24 is a panel that informs the driver of his / her dozing status by displaying LEDs such as green, yellow, and red. A controller (not shown) detects the driver's blink based on the image data of the captured image, determines the drowsiness status, outputs a display signal based on the determination result to the warning panel 24, and responds to the situation. Turn on the LED. The warning panel 24 can also output a sound such as a buzzer, and when it is determined that it is asleep, a red LED is lit and a warning is given by the buzzer. The warning panel 24 is configured to stop a buzzer or the like with a cancel button.

  According to the above embodiment, since the infrared camera 21 and the infrared lamps 22 and 23 are arranged on the dash cover 61 via the support member 10 as described above, as shown in FIG. The driver's face seated in the driver's seat 301 is illuminated by the light beam 22A of the left infrared lamp 22 and the light beam 23A of the right infrared lamp 23 with respect to the rotation center P of the handle 302, and the right infrared camera 21. Is taken within the range and angle indicated by 21A in FIG. Therefore, as described above, the driver's face that is adjusted downward while facing the right side can be clearly photographed from the front and at an elevation angle by the infrared camera 21. As a result, in the controller, the driver's blinking degree is detected based on the captured image, and the driver's drowsiness is determined with high reliability.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, when the position of the driver's face is below, the infrared lamps 22 and 23 are placed on the bases 15A and 15B and the brackets 33 and 34 are used as in the above-described embodiment. , 23 may not be able to illuminate the driver's face by the infrared lamps 22, 23.

  Therefore, as shown in FIG. 7, the infrared lamps 22 and 23 are attached to the lower surfaces of the bases 15 </ b> A and 15 </ b> B via the brackets 33 and 34. With this arrangement, the driver's face below can be illuminated well by the infrared lamps 22 and 23. Further, similarly to the case shown in FIG. 3, by using the brackets 33 and 34, the light irradiation angle by the infrared lamps 22 and 23 may be adjusted according to the position of the driver's face.

  Further, by interposing a spacer 35 as shown in FIGS. 4B and 5B between the lower surfaces of the bases 15A and 15B and the brackets 33 and 34, the height positions of the infrared lamps 22 and 23 are increased. (Position in the vertical direction in FIG. 7) may be further adjusted downward in accordance with the position of the driver's face.

In the above-described embodiment, one infrared lamp is provided on each of the left and right sides. However, as long as the driver's face can be satisfactorily irradiated, the number and arrangement position thereof are arbitrary, and the present invention is not limited to the above-described embodiment.
In the above-described embodiment, the support member 10 has been described as being attached to the dash cover 61 on both the left and right sides via the standing portions 12A and 12B and the leg portions 13A and 13B. , 23 may be prepared separately, and each support member may be attached to a predetermined position of the dash cover 61 with each support member attached thereto.

  In the embodiment, the spacer 32 has been described as a rectangular parallelepiped shape. However, the spacer 32 may have a shape with an inclined upper surface, for example. Even when such a spacer is used, the angles of the infrared camera 21 and the infrared lamps 22 and 23 can be adjusted.

  In the embodiment, the infrared camera 21 and the infrared lamps 22 and 23 are attached to and supported by the support member 10 via the brackets 31, 33 and 34 and the bases 14, 15 A and 15 B. However, the brackets 31, 33 and 34 are supported. Even if the pedestal 14, 15A, 15B is omitted by directly attaching to the support member 10 or the brackets 31, 33, 34 are omitted by attaching the infrared camera 21 and infrared lamp 22 directly to the pedestal 14, 15A, 15B, It is included in the present invention.

  In the above-described embodiment, the infrared lamps 22 and 23 are provided. However, such an illumination device may be provided as necessary. For example, when a high-sensitivity imaging device is used, the illumination device is unnecessary. Can be omitted.

  The present invention can be used for a large dump truck used in a mine or the like.

  DESCRIPTION OF SYMBOLS 1 ... Large dump truck, 2 ... Body, 3 ... Cab, 4 ... Vessel, 6 ... Dashboard, 10 ... Support member, 11 ... Horizontal part, 12A, 12B ... Standing part, 13A, 13B ... Leg part, 14 ... Pedestal, 15A ... left pedestal, 15B ... right pedestal, 21 ... infrared camera as imaging device, 22, 23 ... infrared lamp as illumination device, 31 ... bracket as imaging position adjusting means, 32 ... imaging position adjusting means Spacers, 33, 34 ... Brackets as irradiation position adjusting means, 35 ... Spacers as irradiation position adjusting means, 61 ... Dash cover, 301 ... Driver's seat, 302 ... Handle.

Claims (6)

Body,
A front upper portion of the body, and a cab placed on one side in the vehicle width direction;
In a large dump truck having a vessel placed on the rear upper part of the body,
In the cab,
A driver seat where the driver is seated facing forward,
A handle that is rotated in front of the driver's seat,
A large-sized dump truck comprising: an imaging device disposed in front of the handle and disposed closer to the other side in the vehicle width direction than the rotation center of the handle. The large dump truck according to claim 1,
The body is provided with a ladder for ascending and descending to the cab,
The large-sized dump truck, wherein the imaging device images the driver at an elevation angle. In the large dump truck according to claim 1 or claim 2,
The cab is located in front of the steering wheel and on both sides in the vehicle width direction with respect to the steering wheel, and at least a part of the irradiation light passes through the outside of the steering wheel to irradiate the driver's face. A large dump truck characterized in that at least a pair of left and right lighting devices are provided. In the large dump truck according to claim 3,
In the cab, a dash cover that constitutes a dashboard arranged in front of the handle is provided,
Both sides of a support member having a predetermined length along the vehicle width direction are fixed to the dash cover,
Both the imaging device and the illumination device are supported by the support member. A large-sized dump truck. The large dump truck according to claim 4,
The imaging device is supported by the support member via an imaging position adjusting means provided so that an imaging position can be adjusted,
The said illuminating device is supported by the said supporting member via the irradiation position adjustment means provided so that irradiation position was adjustable. The large sized dump truck characterized by the above-mentioned. In the large dump truck according to claim 4 or 5,
The large dump truck, wherein the support member is provided with a pedestal to which the imaging position adjusting means is detachably attached and a pedestal to which the irradiation position adjusting means is detachably attached.

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