JP6588545B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle.

  A work vehicle such as a forklift works at the work site. The driver seated in the driver's seat looks directly at the rear of the work vehicle and confirms the situation behind the work vehicle.

JP 2003-192284 A

  For example, in a large work vehicle, when the driver visually recognizes the rear of the work vehicle from the driver's seat, the area far from the work vehicle can be directly viewed, but the area close to the work vehicle becomes a blind spot, making it difficult to view directly. High nature. Therefore, there is a demand for a technique that allows the driver to more reliably recognize the situation behind the work vehicle.

  The aspect of this invention aims at providing the work vehicle which can make a driver | operator recognize the back condition more reliably.

  According to an aspect of the present invention, a vehicle body, a driver seat provided in the vehicle body, a ceiling member disposed above the driver seat, a right rear support column that supports a right rear portion of the ceiling member, and the right A work vehicle including a first endoscope supported by a rear support column is provided.

  According to the aspect of the present invention, there is provided a work vehicle that allows the driver to recognize the situation behind the vehicle more reliably.

FIG. 1 is a side view schematically showing an example of a work vehicle according to the present embodiment. FIG. 2 is a perspective view showing an example of a work vehicle according to the present embodiment. FIG. 3 is a perspective view showing an example of a work vehicle according to the present embodiment. FIG. 4 is an enlarged view of the rear support pillar and the rear mirror of the driver seat according to the present embodiment. FIG. 5 is a side view showing an example of the field of view of the rear mirror and the rear under mirror according to the present embodiment. FIG. 6 is a plan view illustrating an example of the field of view of the rear mirror and the rear under mirror according to the present embodiment. FIG. 7 is a diagram illustrating an example of an image reflected on the rear mirror according to the present embodiment.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings, but the present invention is not limited thereto. The components of the embodiments described below can be combined as appropriate. Some components may not be used.

[Work vehicle]
FIG. 1 is a side view schematically showing an example of a work vehicle 1 according to the present embodiment. In the present embodiment, it is assumed that the work vehicle 1 is a forklift. In the following description, the work vehicle 1 is appropriately referred to as a forklift 1.

  As shown in FIG. 1, the forklift 1 includes a vehicle body 2, a traveling device 3, a work implement 4, a driver's seat 5, an engine 6, a hydraulic pump 7, a hydraulic motor 8, a hydraulic cylinder 9, and a display. Device 10, battery 20, operating device 50, and main control device 100 are provided.

  The vehicle body 2 supports the work implement 4, the driver's seat 5, the engine 6, the hydraulic pump 7, the hydraulic motor 8, the hydraulic cylinder 9, the display device 10, the battery 20, the operating device 50, and the main control device 100.

  The traveling device 3 supports the vehicle body 2. The traveling device 3 has a front wheel 3F and a rear wheel 3R. The front wheel 3F and the rear wheel 3R are rotatable about a rotation axis. A front tire 3FT is attached to the front wheel 3F. A rear tire 3RT is attached to the rear wheel 3R.

  In the following description, the direction parallel to the rotation axis of the front wheel 3F and the rotation axis of the rear wheel 3R when the forklift 1 travels in a straight traveling state is appropriately referred to as the vehicle width direction of the forklift 1, and the tire is in contact with the ground. The direction parallel to the vertical axis perpendicular to the ground contact surface of 3FT and the tire 3RT is appropriately referred to as the vertical direction of the forklift 1, and the direction orthogonal to both the rotation axis and the vertical axis is appropriately referred to as the longitudinal direction of the forklift 1. .

  In the present embodiment, the direction in which the work implement 4 is present with respect to the driver seated in the driver's seat 5 is the front, and the reverse direction of the front is the rear. Further, the right side of the driver seated forward in the driver's seat 5 is the right side, and the reverse direction of the right side is the left side. One of the up and down directions is upward, and the reverse direction of the upper side is downward.

  The driver's seat 5 is provided on the vehicle body 2. The driver's seat 5 is disposed on one side (left side) of the vehicle body 2 in the vehicle width direction. The front wheel 3F is disposed in front of the rear wheel 3R. The front wheels 3F are arranged on both sides of the vehicle body 2 in the vehicle width direction. The rear wheels 3R are arranged on both sides of the vehicle body 2 in the vehicle width direction.

  The work machine 4 is supported by the vehicle body 2. The work machine 4 includes a mast 41 supported by the vehicle body 2 and a fork 42 supported by the mast 41.

  The hydraulic pump 7 discharges hydraulic oil that operates the traveling device 3 and hydraulic oil that operates the work machine 4. The hydraulic pump 7 includes a traveling hydraulic pump that discharges hydraulic oil for operating the traveling device 3, and a working machine hydraulic pump that discharges hydraulic oil for operating the working machine 4. The hydraulic pump 7 is driven by the engine 6.

  The hydraulic motor 8 is driven by the hydraulic oil discharged from the hydraulic pump 7. The hydraulic motor 8 drives the traveling device 3.

  In the present embodiment, the front wheel 3F is a drive wheel. The rear wheel 3R is a steered wheel. The hydraulic motor 8 is connected to a front wheel 3F that is a driving wheel. In the present embodiment, the hydraulic pump 7 is driven by the engine 6 to discharge the hydraulic oil, and the hydraulic motor 8 is driven. When the front wheels 3F are rotated by the hydraulic motor 8, the traveling device 3 moves forward or backward. The traveling device 3 includes a steering device 30 that steers the rear wheel 3R that is a steering wheel. When the rear wheel 3R is steered by the steering device 30, the traveling device 3 turns.

  The hydraulic cylinder 9 is driven by hydraulic fluid discharged from the hydraulic pump 7. The hydraulic cylinder 9 drives the work machine 4. The hydraulic cylinder 9 includes a tilt cylinder 91 that tilts the mast 41 in the front-rear direction and a lift cylinder 92 that moves the fork 42 in the vertical direction. When the mast 41 is tilted in the front-rear direction by driving the tilt cylinder 91, the fork 42 is tilted in the front-rear direction while being supported by the mast 41. The fork 42 moves up and down while being supported by the mast 41 by driving the lift cylinder 92.

  The battery 20 supplies power to the electronic device mounted on the forklift 1. The battery 20 is, for example, a rechargeable battery.

  Main controller 100 includes a computer system. Main controller 100 includes an arithmetic processing unit including a processor such as a CPU (Central Processing Unit), a volatile memory such as a RAM (Random Access Memory), and a non-volatile memory such as a ROM (Read Only Memory). A storage device and an input / output interface are included.

  In the present embodiment, the forklift 1 supports a head guard (ceiling member) 51 disposed above the driver's seat 5, a front support column 52 that supports the front part of the head guard 51, and a rear part of the head guard 51. And a rear mirror 55 that is a first endoscope supported by the rear support column 53. A power transmission mechanism and the like are arranged below the floor of the driver seat 5. For this reason, the distance from the ground to the floor surface of the driver's seat 5 is high.

  The forklift 1 includes a counterweight 21 provided at the vehicle body rear portion 2R, a mooring member 22 provided at the counterweight 21, an engine hood (exterior member) 23, a muffler 24, and a second rear provided at the vehicle body rear portion 2R. And a rear under mirror 25 that is a endoscope.

  The counterweight 21 is a weight for balancing the weight with the fork 42 that supports the load. The counterweight 21 is made of metal, for example. The count weight 21 may not be made of metal.

  The mooring member 22 is provided at the rear part of the counterweight 21. The mooring member 22 is a plate-like member and has a through hole 22a. When the counterweight 21 is transported, the hook is inserted into the through hole 22a, and the counterweight 21 is transported while being suspended from the hook. At least a part of the hook is inserted into the through hole 22a. The mooring member 22 is used when the counterweight 21 is conveyed in the assembly process of the forklift 1.

  The rear under mirror 25 is attached to the anchoring member 22 via an attachment frame. Therefore, the mooring member 22 is used both when attaching the hook when transporting the counterweight 21 and when attaching the rear under mirror 25. The rear under mirror 25 makes the driver recognize the situation behind the vehicle body rear portion 2R. When the driver seated in the driver's seat 5 looks at the rear under mirror 25, the installation position of the rear under mirror 25 is defined so that the ground below the rear end of the rear part 2R of the vehicle body is reflected on the rear under mirror 25.

  The engine hood 23 is an exterior member that is disposed at a position that covers the center of the vehicle body rear portion 2R in the vehicle width direction. An exhaust gas processing device 6a is provided inside the vehicle body rear portion 2R. The exhaust gas processing device 6 a processes the exhaust gas discharged from the engine 6. The exhaust gas treatment device 6a includes, for example, a DPF (Diesel Particulate Filter) device and a urea SCR (Selective Catalytic Reduction) device. The muffler 24 extends upward from the engine hood 23. The muffler 24 discharges the gas after being processed by the exhaust gas processing device 6a. The forklift 1 has an engine 6 and an exhaust gas treatment device 6a mounted behind the driver's seat 5, and an engine hood 23 is disposed at a position higher than the ground.

[driving seat]
FIG.2 and FIG.3 is a perspective view which shows an example of the forklift 1 which concerns on this embodiment. FIG. 2 shows a state in which the forklift 1 is viewed from the right in the vehicle width direction and from the rear in the front-rear direction. FIG. 3 shows a state in which the forklift 1 is viewed from the left in the vehicle width direction and from the rear in the front-rear direction. As shown in FIGS. 2 and 3, the driver's seat 5 is provided on the left side (one side) of the center in the vehicle width direction. The driver seat 5 may be provided on the right side of the center in the vehicle width direction.

  A display device 10 and an operation device 50 are provided in front of the driver seat 5. The display device 10 displays data such as vehicle speed, for example. The display device 10 includes a flat panel display such as a liquid crystal display (LCD) or an organic EL display (OELD). The display device 10 is disposed in front of the driver seated in the driver seat 5.

  The operating device 50 is operated by a driver seated on the driver's seat 5. The forklift 1 operates based on the operation of the operating device 50. The operating device 50 is disposed in front of the driver who is seated in the driver's seat 5. The operation device 50 includes, for example, a steering wheel, an accelerator pedal, a brake pedal, a work machine lever, a forward / reverse lever, a key switch, a horn switch, a combination switch, and a parking brake lever. Various levers such as a work machine lever and a forward / reverse lever are arranged on the right side of the driver's seat 5. When operating the various levers, the driver seated in the driver's seat 5 operates the various levers with the right hand while the steering wheel is supported with the left hand, for example.

  The head guard 51 is disposed above the driver seat 5. The head guard 51 is arranged above the driver's head when the driver is seated on the driver's seat 5. The head guard 51 has a rectangular shape, for example.

  The head guard 51 is supported by a front support column 52 and a rear support column 53. The front support column 52 and the rear support column 53 are disposed outside the driver seat 5 in the vehicle width direction and are supported by the vehicle body 2. The front support columns 52 support the left and right ends of the front part of the head guard 51, that is, the two corners in front of the head guard 51. The front support column 52 is disposed in front of the driver seat 5. The rear support pillars 53 support the left and right ends of the rear part of the head guard 51, that is, the two corners behind the head guard 51. The rear support column 53 is disposed behind the driver seat 5.

[Rear mirror]
The rear mirror 55 is supported by the rear support column 53. The rear mirror 55 allows the driver to recognize the state of the area behind the rear body 2R of the vehicle body, close to the work vehicle, and forming a blind spot by the rear body 2R of the vehicle body. The rear mirror 55 is disposed on the other side (right side) than the center in the vehicle width direction. In the present embodiment, the rear mirror 55 is supported by the right rear support column 53a on the opposite side of the driver seat 5 in the vehicle width direction among the two rear support columns 53. The rear mirror 55 is disposed, for example, below the head guard 51 and above the upper end of the engine hood 23.

  The rear mirror 55 is disposed at a position away from the rear under mirror 25. For this reason, when the driver looks at the rear mirror 55 from the driver's seat 5, the rear under mirror 25 becomes difficult to enter the field of view. Further, when the driver views the rear under mirror 25 from the driver's seat 5, the rear mirror 55 is difficult to enter the field of view. Thus, when the driver views one of the rear mirror 55 and the rear under mirror 25 from the driver's seat 5, the other mirror can be prevented from entering the field of view side by side.

  FIG. 4 is an enlarged view of the right rear support column 53a and the rear mirror 55 of the driver's seat 5 according to the present embodiment. As shown in FIG. 4, the rear mirror 55 includes a mirror 61, a cover 62, a case 63, a holder 64, and an attachment frame 65.

  The mirror 61 is a convex mirror. For example, the mirror 61 is arranged such that the optical axis of the mirror 61 extends in the vehicle width direction. The mirror 61 is attached to the right rear support column 53a through the cover 62, the case 63, the holder 64, and the attachment frame 65. In the present embodiment, the rear mirror 55 is supported by the right rear support column 53a so that the mirror 61 faces leftward in the vehicle width direction.

  The cover 62 protects the outer periphery of the mirror 61. The case 63 accommodates the mirror 61 and the cover 62. In the rear mirror 55, the mirror 61, the cover 62, and the case 63 are integrated.

  The attachment frame 65 is attached to the right rear support column 53a. The attachment frame 65 supports the holder 64 so as to be tiltable. The holder 64 holds the case 63 in a tiltable manner. By tilting the case 63 and the holder 64, the direction of the optical axis of the mirror 61 of the rear mirror 55 is adjusted.

  5 and 6 are views showing an example of the field of view of the rear mirror 55 and the rear under mirror 25 according to the present embodiment. FIG. 5 is a diagram illustrating an example when the driver's seat 5 is viewed from the left in the vehicle width direction. FIG. 6 is a diagram showing an example when the rear part 2R of the vehicle body is viewed from above.

  As shown in FIGS. 5 and 6, when the driver is seated and looks at the rear mirror 55 from the position P of the driver's seat 5 (line of sight E1), the rear mirror 55 shows the first area A1 behind the vehicle body 2. On the other hand, when the driver views the rear under mirror 25 from the position P of the driver's seat 5 (line of sight E2), the second region A2 behind the vehicle body 2 is reflected on the rear under mirror 25. In FIG. 6, the third area A <b> 3 is an area that can be directly viewed when the driver looks back from the position P of the driver seat 5. As described above, by arranging the rear mirror 55, the driver of the driver's seat 5 can recognize the area behind the rear part 2R of the vehicle body that is a blind spot only with the rear under mirror 25 alone. In FIG. 6, an alternate long and short dash line drawn from the rear mirror 55 to the first area A <b> 1 and an alternate long and two short dashes line drawn from the under mirror 25 to the second area A <b> 2 are images of how they are seen from the driver's seat 5. Is shown.

  When a photographing device such as a camera is arranged at the position P and the rear mirror 55 is photographed with the optical axis of the photographing device aligned with the line of sight E1, the rear mirror 55 in the image is placed on the rear mirror 55 in the same manner as when the driver looks directly. The first area A1 is reflected. Further, when the rear under mirror 25 is photographed with the optical axis of the photographing device coincident with the line of sight E2, the second region A2 is reflected on the rear under mirror 25 in the video, as in the case where the driver looks directly.

  As shown in FIG.5 and FIG.6, 1st area | region A1 is back rather than 2nd area | region A2. Thus, when the driver looks at the rear mirror 55 from the position P of the driver's seat 5, the first area A1 reflected on the rear mirror 55 is the rear under mirror when the driver views the rear under mirror 25 from the driver's seat 5. The rear mirror 55 and the rear under mirror 25 are arranged so as to be behind the area 2A2 reflected in the area 25. Further, the first area A1 and the second area A2 partially overlap. For this reason, when the driver looks at the rear mirror 55 and the rear under mirror 25 from the driver's seat 5, the rear of the vehicle rear portion 2R can be visually recognized without blind spots.

  FIG. 7 is a diagram illustrating an example of an image reflected on the rear mirror 55 according to the present embodiment. FIG. 7 shows an image reflected on the rear mirror 55 when the driver views the rear mirror 55 from the position P of the driver's seat 5. In FIG. 7, the right side in the figure is the outer side (right side) in the vehicle width direction, and the left side in the figure is the inner side (center side) in the vehicle width direction.

  As shown in FIG. 7, an image 2RM of the rear body 2R of the vehicle body is reflected on the rear mirror 55. For example, the rear mirror 55 includes a counterweight image 21M that is an image of the counterweight 21, an anchoring member image 22M that is an image of the anchoring member 22, an engine hood image 23M that is an image of the engine hood 23, and an image of the muffler 24. Are a muffler image 24M and a rear under mirror image 25M which is an image of the rear under mirror 25.

  When the rear mirror 55 is viewed from the driver's seat 5, the rear mirror 55 is arranged so that the outer side in the vehicle width direction is reflected on the rear mirror 55 from the muffler image 24M.

  The muffler image 24M is reflected at a position shifted to the left in the figure with respect to the central portion of the rear mirror 55. As described above, the rear mirror 55 is arranged so that the muffler image 24 </ b> M appears off the center of the rear mirror 55 when viewed from the position P of the driver seat 5. The rear mirror 55 shows the situation behind the vehicle body 2 including the first region A1 on the right side of the muffler image 24M.

  Further, the rear under mirror image 25 </ b> M reflected on the rear mirror 55 includes an image reflected on the rear under mirror 25. That is, the rear mirror 55 and the rear under mirror 25 are arranged so that the rear under mirror 25 is reflected on the rear mirror 55 when the rear mirror 55 is viewed from the driver's seat 5. For this reason, the driver can confirm the image of the rear under mirror 25 reflected on the rear mirror 55 without looking directly at the rear under mirror 25 by looking at the rear mirror 55.

[effect]
As described above, according to the present embodiment, the forklift 1 includes the vehicle body 2, the driver's seat 5 provided in the vehicle body 2, the head guard 51 disposed above the driver's seat 5, and the right side of the head guard 51. A right rear support column 53a that supports the rear portion and a rear mirror 55 that is supported by the right rear support column 53a are provided. As a result, the driver can check the rear state of the vehicle body 2 without looking back largely by looking at the rear mirror 55 supported by the right rear support column 53a. Therefore, the driver can be made to recognize the situation behind the vehicle body 2 more reliably.

  In the present embodiment, the vehicle body 2 includes the rear under mirror 25 at the rear of the rear mirror 55. The rear mirror 55 has a first area A1 reflected on the rear mirror 55 and a second area A2 reflected on the rear under mirror 25. Be behind. Accordingly, the driver can be surely recognized a region that is behind the vehicle body 2 and close to the work vehicle 2 and becomes a blind spot by the vehicle body rear portion 2R.

  In the present embodiment, the rear mirror 55 is disposed at a position where the rear under mirror 25 is reflected on the rear mirror 55. As a result, the driver can recognize the image reflected on the rear under mirror 25 by looking at the rear mirror 55. Therefore, the driver can efficiently recognize the situation behind the vehicle body. In addition, the driver can intuitively recognize which part of the rear mirror 55 reflects behind the vehicle body using the rear under mirror 25 as a mark.

  In the present embodiment, the muffler 24 is provided behind the rear mirror 55 in the vehicle body 2. The muffler 24 extends upward from the vehicle body 2. The rear mirror 55 is arranged so that the outside of the vehicle body 2 in the vehicle width direction is reflected on the rear mirror 55 from the muffler 24 when the operator seated on the driver's seat 5 looks at the rear mirror 55. Thereby, even when the muffler 24 is arranged in the rear part 2R of the vehicle body, it is possible to make the driver recognize the situation behind the vehicle body 2 more reliably.

  In the present embodiment, the vehicle body 2 has an engine hood 23 provided behind the rear mirror 55 in the vehicle body 2. By mounting the exhaust gas treatment device 6a on the vehicle body 2, the engine hood 23 is arranged at a high position. For this reason, the visual field of the operator seated in the driver's seat 5 is blocked by the engine hood 23. The rear mirror 55 is disposed above the engine hood 23. Thereby, the visual field blocked by the engine hood 23 can be confirmed by being reflected on the rear mirror 55.

  In the above-described embodiment, the forklift 1 may not include both the rear mirror 55 and the rear under mirror 25. For example, the rear under mirror 25 may not be provided.

  In the above-described embodiment, the rear mirror 55 may be disposed at a position where the muffler image 24M is reflected in the center when viewed from the driver's seat 5.

  In the above-described embodiment, the rear under mirror 25 may not be configured to be attached to the anchoring member 22 of the counterweight 21. For example, the rear under mirror 25 may be provided at other portions of the counterweight 21 or at the vehicle body rear portion 2R. It may be attached to a portion other than the counterweight 21.

  In the above-described embodiment, the rear mirror 55 does not have to be arranged at a position where the rear under mirror 25 is reflected when viewed from the driver seat 5, and the rear under mirror 25 is not viewed when viewed from the driver seat 5. The rear mirror 55 may be arranged at a position where it is not reflected.

  In the above-described embodiment, the driver's seat 5 is disposed on the left side of the vehicle body 2 in the vehicle width direction, and the rear mirror 55 is disposed on the opposite side of the driver seat 5 in the vehicle width direction, that is, on the right side in the vehicle width direction. It was decided to include. The driver's seat 5 may be arranged at the center of the vehicle body 2. Also in this case, the rear mirror 55 can be disposed on the right rear support column 53a on the right side of the driver seat 5 in the vehicle width direction.

  A1 ... first region, A2 ... second region, A3 ... third region, E1, E2 ... line of sight, P ... position, 1 ... work vehicle, forklift, 2 ... vehicle body, 2R ... vehicle body rear, rear, 2RM ... image, DESCRIPTION OF SYMBOLS 3 ... Traveling device, 3F ... Front wheel, 3R ... Rear wheel, 3FT ... Front tire, 3RT ... Rear tire, 4 ... Working machine, 5 ... Driver's seat, 6 ... Engine, 6a ... Exhaust gas processing device, 7 ... Hydraulic pump, DESCRIPTION OF SYMBOLS 8 ... Hydraulic motor, 9 ... Hydraulic cylinder, 10 ... Display apparatus, 20 ... Battery, 21 ... Counterweight, 21M ... Counterweight image, 22 ... Mooring member, 22M ... Mooring member image, 22a ... Through-hole, 23 ... Engine hood , 23M ... engine hood image, 24 ... muffler, 24M ... muffler image, 25 ... rear under mirror (second rearview mirror), 25M ... rear under mirror image, 30 ... steering device, 41 ... mast, 42 ... 50 ... operating device 51 ... head guard 52 ... front support column 53 ... rear support column 53a ... right rear support column 55 ... rear mirror (first rear view mirror) 61 ... mirror 62 ... cover , 63, a case, 64, a holder, 65, a mounting frame, 91, a tilt cylinder, 92, a lift cylinder, 100, a main control device.

Claims (4)

The car body,
A driver seat provided in the vehicle body;
A ceiling member disposed above the driver seat;
A right rear support column for supporting the right rear portion of the ceiling member;
A first endoscope supported by the right rear support column;
A second rear scope at the rear of the first rear scope ;
The first area reflected in the first rearview mirror is behind the second area reflected in the second rearviewscope.
Work vehicle. The first rearview mirror and the second rearview mirror are arranged so that the second rearview mirror is reflected on the first rearview mirror;
The work vehicle according to claim 1 . In the vehicle body, provided with a muffler provided rearward of the first rearview mirror and extending upward,
The first rear-view mirror is arranged so that the outer side of the vehicle body in the vehicle width direction is reflected on the first rear-view mirror from the muffler.
The work vehicle according to claim 1 or claim 2 . An exterior member provided behind the first rear-view mirror in the vehicle body;
The first endoscope is disposed above the exterior member;
The work vehicle according to any one of claims 1 to 3 .

Images