JP2020007759A - Work vehicle - Google Patents

Abstract

To provide a work vehicle in which fatigue of an operator is reduced, work efficiency is improved, danger is prevented, damage of a camera is less, wide visual field is obtained at the rear, and manufacturing cost is low.SOLUTION: A work vehicle 1 comprises: a counter weight 41 positioned at a rear end portion of an upper structure 4; a rear bonnet 42 erected from the counterweight 41; a cabin 43 erected at one of left and right side portions of the upper structure and from an upper part of the rear bonnet; a side portion bonnet disposed at the other side portion of the left and right side portions of the upper structure 4; an engine 45 disposed at a rear portion of the upper structure 4 and surrounded by the rear bonnet 42 and the side portion bonnet; and a capturing portion 5 disposed at the rear of the cabin 43 and at an upper part of the side portion bonnet.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a work vehicle provided with a rear viewing device.

  Patent Literature 1 discloses, as a mounting structure of a camera for monitoring the back of a backhoe, a housing portion formed in the front front portion of a counterweight, a reflecting mirror that bends an observation field of view in the housing portion, and an observation field reflected by the reflecting mirror. Disclosed is a structure in which a camera for capturing an image is arranged, and a housing is covered with a window made of a transparent material.

  Patent Document 2 discloses a structure for fixing a camera bracket for supporting the camera to the upper surface of the counterweight main body, as a mounting structure of a camera that monitors the back of the backhoe.

  Patent Literature 3 discloses that a camera is installed on an outer surface of a cabin in order to generate a driving assistance image which is perspectively projected on a wall and a ceiling of a driver's seat.

JP 2005-180065 A JP 2016-212344 A JP-A-2006-212503

  However, in Patent Literature 1, since the window for taking in the observation field of view is arranged in the lower surface direction of the counter weight, the camera body is less likely to be damaged and stained. I can't get it. Since it is embedded in the counterweight and the installation height of the camera is reduced, a wide field of view cannot be obtained with the rear end of the backhoe included in the field of view. Further, the structure embedded in the counterweight does not allow the counterweight parts to be shared between the standard work vehicle without the camera and the optional work vehicle with the camera attached, thereby increasing the manufacturing cost.

  In Patent Document 2, since the camera is mounted on the upper part of the counterweight, a wide field of view can be obtained by including the rear end of the backhoe in the field of view, and parts such as the counterweight can be shared. , So that the manufacturing cost is not increased. However, in the case of a small turning type small work vehicle in which the rear end of the cabin rises from the counterweight and covers the engine from the counterweight, and the rear wall of the cabin rises from the top of the bonnet, the bonnet door may depend on the method of opening the hood door. Can interfere with the camera mounting position and its wiring.

  Further, in the work by the work vehicle, the operator needs to look back and check the rearview mirror each time as necessary for safety check during operation. Therefore, in the work in which forward / backward movement is frequently repeated, the fatigue burden on the operator is very large, and the work may be delayed due to a time lag of looking back / turning forward. Further, in order to confirm a wide field of view, the operator needs to alternately look back at the left rear and the right rear, further increasing the fatigue burden. In order to determine the danger in advance, it is very important to confirm the exact shape and position of the object.

  Further, in Patent Literature 3, since a plurality of cameras need to be installed in order to generate a driving assistance image to be perspectively projected, a small turning-type image can be obtained without electronically processing an image captured by a single camera. It does not disclose a camera installation position that obtains a wide field of view by including the rear end of the small work vehicle in the field of view.

  In recent years, there has been a trend in civil engineering sites and construction sites to set voluntary safety regulations not only for large-sized work vehicles but also for small-sized work vehicles. In a small work vehicle, in addition to a structure in which a rearview mirror is provided for confirming rear safety and preventing contact, it is being proposed to provide a rear camera for further improving rear visibility. However, in the case of a small work vehicle, since the cabin is mounted almost vertically from the wall surface of the backhoe, it is difficult to mount the back camera behind the backhoe.

  The present invention has been made in consideration of the above problems, and has been made in consideration of the problems described above, a working vehicle capable of reducing operator fatigue, improving work efficiency, excellent danger prevention properties, obtaining an image having a wide rear view with less damage, and inexpensive manufacturing cost, particularly a small work vehicle. Vehicle.

The work vehicle of the present invention is a work vehicle having an upper revolving unit and a lower traveling unit that supports the upper revolving unit in a freely rotatable manner.
A counterweight located at the rear end of the upper revolving unit,
A rear hood erected from the counterweight,
A cabin that is erected from one of the left and right side portions of the upper revolving structure and from above the rear bonnet;
A side bonnet arranged on the other side of the left and right sides of the upper revolving unit,
An engine disposed at the rear of the upper revolving unit and surrounded by the rear bonnet and / or the side bonnet;
An imaging unit disposed behind the cabin and above the side bonnet.

The work vehicle of the present invention may be a so-called small backward turning type work vehicle, for example, a mini shovel.
Further, the work vehicle may have a vibration-damping structure in which the cabin is supported by the vibration-absorbing structure in the upper revolving structure and / or an anti-vibration structure in which the cabin is supported by vibration-proofing from the upper part of the rear hood. May be provided. The anti-vibration structure may be a structure in which the cabin is installed above the frame of the upper swing body and / or the rear bonnet via an anti-vibration member such as an elastic member.

Further, the imaging unit may be mounted on a rearview mirror mounting seat installed at an upper part behind the cabin.
This makes it possible to mount the imaging unit on the rear-view mirror mounting seat installed on the standard product, eliminating the need to separately manufacture the cabin of the standard work vehicle and the cabin of the work vehicle equipped with the imaging unit for rear view. Therefore, the manufacturing cost can be reduced.

The work vehicle may further include a display device that displays an image captured by the imaging unit.
The display device is provided on the other side of the left and right sides from the center of the control unit disposed inside the cabin disposed on one of the left and right sides (left or right) of the upper swing body. It may be arranged on the upper front side of the operation panel of the main unit arranged on the right side or the left side.
The display device may have a dedicated bracket fixed to a cabin mounting seat mounted on an arbitrary frame on the cabin side, and may be mounted via the dedicated bracket.
As a result, since the display on the operation panel of the machine and the view at the lower right of the cabin (or the lower left of the cabin) are not obstructed, it is possible to visually check the tip of the right (or left) crawler, which is effective in preventing danger. .

The work vehicle further includes a wired cable connecting the imaging unit and the display device,
The cabin frame, wherein the cable is disposed on one of the left and right sides (left or right) of the upper revolving structure, and the other side of the left and right sides of the work vehicle from the center. It may be routed along the (right or left) frame.
The cable of the imaging unit may be introduced into the cabin from near the antenna mounting (for example, near the antenna mounting seat).
Accordingly, since there is no movable part such as an opening / closing door such as a side bonnet or a rear bonnet in the cable routing route, short-circuiting and disconnection due to repeated bending of the cable are unlikely to occur.
Further, since the cable can be routed along the inside or outside of the frame such as the cabin, the length of the cable can be minimized, and the manufacturing cost of the cable can be reduced.

The cable may be routed along a frame of the cabin and may be configured to be at least partially covered by a protection member.
Examples of the protection member include a clip, a long cable cover having a concave cross section, and a panel cover adapted to a frame shape.
The protection member may have a fixing unit or a detaching unit for fixing the protection member to the frame.
This allows the cable to be routed along the frame of the cabin, and the cable to be protected by the protection member, so that it can withstand severe use for a long time.

According to the present invention, a wide field of view including the rear end portion such as the rear hood can be obtained. Further, since the mounting position of the imaging unit of the cabin can be set near the center of the vehicle body of the work vehicle, an image with less discomfort can be obtained from the imaging unit. This is effective in reducing operator fatigue, improving work efficiency and preventing danger.
Further, since the cabin erected on the upper revolving structure is, for example, vibration-proof supported, it is difficult to transmit vibrations and impacts transmitted from the work vehicle to the imaging unit.
In addition, since the image displayed on the display device can be confirmed only by the movement of the operator's line of sight, even in the case of frequently repeating forward or backward movement, the operator's fatigue burden is extremely small, looking back or turning back, Work delays due to such time lags are eliminated. In addition, in order to confirm a wide range, the operator does not need to look back left and right alternately, and the fatigue burden is further reduced. In addition, it becomes easier to recognize the exact shape and position of the object for determining danger.

FIG. 2 is a right rear side perspective view showing the work vehicle according to the first embodiment. FIG. 2 is a left rear side perspective view showing the work vehicle according to the first embodiment. FIG. 1B is a partially enlarged view of the vicinity of an imaging unit in FIG. 1A. FIG. 2 is a perspective view showing a cable routing structure according to the first embodiment. FIG. 9 is a perspective view showing a cable routing structure according to the second embodiment. FIG. 9 is a perspective view showing a cable routing structure according to the second embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As an example of the work vehicle of the present embodiment, a small backward turning mini excavator will be described. However, the working vehicle is not limited to a small rear-turning mini excavator, and may be another vehicle such as another backhoe or a wheel loader. In the drawings, the traveling direction of the vehicle is indicated by “front” and “rear”, the width direction of the vehicle is indicated by “left” and “right”, and the height direction of the vehicle is indicated by “up” and “down”. When indicating the arrangement, “front” means before the forward direction, and “rear” means after the forward direction. “Right” refers to “right” and refers to the right in the width direction of the vehicle, and “left” refers to “front” and refers to left in the width direction of the vehicle.

  1A and 1B are a right side perspective view and a left side perspective view of the mini-excavator 1, respectively, and explain a schematic configuration of the mini-excavator 1. The mini excavator 1 includes a lower traveling unit 2, a work implement 3, and an upper revolving unit 4.

  The lower traveling unit 2 is driven by receiving power from an engine 45 installed in the upper revolving unit 4, and causes the mini excavator 1 to travel. The lower traveling body 2 includes left and right crawlers 21L and 21R and a pair of left and right traveling motors 22L and 22R. The left and right traveling motors 22L and 22R, which are hydraulic motors, drive the left and right crawlers 21L and 21R, respectively, so that the mini excavator 1 can move forward and backward. Further, the lower traveling body 2 is provided with a blade 23 in a reverse direction and a blade cylinder 24 as a hydraulic actuator for rotating the blade 23 in a vertical direction.

  The work machine 3 is driven by receiving power from the engine 45 and performs excavation work such as earth and sand. The work machine 3 includes a boom 31, an arm 32, and a bucket 33, and enables excavation work by independently driving these.

  The boom 31 is rotatably supported by a boom cylinder 31a which has a base end rotatably supported by a front portion of the upper swing body 4 and is vertically movable. The arm 32 has its base end supported by the distal end of the boom 31, and is rotated by an arm cylinder 32a that is movable in a stretchable manner. The bucket 33 is supported by the distal end of the arm 32 at the base end, and is rotated by a bucket cylinder 33a that is movable in a retractable manner. The boom cylinder 31a, the arm cylinder 32a, and the bucket cylinder 33a correspond to a hydraulic actuator that drives a working unit. An articulated structure is formed by the boom 31 and the arm 32, and the boom 31 is arranged on the most proximal side of the elements constituting the articulated structure.

The upper revolving unit 4 includes a counterweight 41 located at a rear end thereof, a rear hood 42 erected from the counterweight 41, and a cabin 43 erected on the left side of the upper revolving unit 4 and from above the rear hood 42. And a right hood 44 disposed on the right side of the upper revolving unit 4, and an engine 45 disposed on a rear portion of the upper revolving unit 4 and surrounded by the rear hood 42 and the right side hood 44. The engine 45 is indicated by a broken line.
Further, the upper revolving superstructure 4 includes a control unit 46, a revolving base 47, a revolving motor, and the like inside the cabin 43. The upper revolving superstructure 4 is revolved by driving the revolving base 47 by a revolving motor which is a hydraulic motor. Further, a plurality of hydraulic pumps (not shown) driven by the engine 45 are disposed on the upper swing body 4. These hydraulic pumps supply hydraulic oil to the boom cylinder 31a, the arm cylinder 32a, and the bucket cylinder 33a. The hydraulic pump supplies hydraulic oil to a swivel joint (not shown) of the lower traveling body 2 and drives a blade cylinder 24, a left traveling motor 22L, and a right traveling motor 22R connected to the swivel joint and each hydraulic hose. Is done.

As shown in FIGS. 1A, 1B, and 1C, an imaging unit 5 is provided behind the cabin 43 and on the upper side on the right bonnet 44 side.
Examples of the imaging unit 5 include a CCD camera and a CMOS camera. The imaging unit 5 can capture a moving image and can capture a still image.

  In the first embodiment, the imaging unit 5 is attached to a rearview mirror attachment seat 6 attached with a fixing member, for example, a bolt 61 above the right rear standing frame 431 of the cabin 43, with a fixing member, for example, a bolt 62. . In the present embodiment, the rearview mirror is detached from the rearview mirror mounting seat 6. In the present embodiment, the rearview mirror mounting seat 6 has a U-shape that opens downward when viewed from the front. The imaging unit 5 is housed and fixed in the opening space. The imaging unit 5 captures an image from above the right rear standing frame 431 to below and rearward. The imaging unit 5 is fixed at an adjusted angle so as to capture an image including all or a part of the rear hood 42 and / or the counterweight 41.

  Since the imaging unit 5 is provided substantially behind the left and right centers of the mini excavator 1, it is possible to image the left and right rear in a wide range without being biased to the left or right rear. Further, the rear-view mirror mounting seat 6 exhibits a buffer function to absorb vibrations and shocks, so that the failure of the imaging unit 5 can be reduced as compared with the case where the imaging unit 5 is directly attached to the right rear standing frame 431. . In addition, the imaging unit 5 is not limited to being mounted via the rear-view mirror mounting seat 6, and the imaging unit 5 may be fixed to the right rear standing frame 431 directly or via a bracket.

  The first cable 51 for transmitting an image from the imaging unit 5 is guided upward through the top surface through-hole 63 of the rearview mirror mounting seat 6, is hooked by the first clip 4311a, and is attached to the antenna mounting seat 81 to which the antenna 8 is mounted. Is guided to the inside of the cabin 43 through the through hole 82 near the center. The first clip 4311a is fixed to a support portion 4311 attached to the right rear standing frame 431. The first cable 51 guided inside the cabin 43 extends downward along the inside of the right rear standing frame 431. Details of the cable routing structure will be described later.

[Deployment structure of the first embodiment]
FIG. 2 shows a cable routing structure according to the first embodiment. FIG. 2 shows components necessary for explaining the cable routing structure, and other components are omitted.

  A connector 52 is provided at the end of the first cable 51, and a second cable 53 connected to the connector 52 extends downward along the inside of the right rear standing frame 431, and further inside the right front and rear frames 432. Extends from the right rear to the right front of the control unit 46 and is connected to the monitor 7.

  The first cable 51 is protected by being covered with a long first cable cover 201 having a concave cross section inside the right rear standing frame 431. The first cable cover 201 can be fixed to the inner surface of the right rear standing frame 431 by any fixing means.

  The second cable 53 connected to the connector 52 is covered with second and third cable covers 202 and 203 having a concave cross-section in the order from top to bottom inside the right rear standing frame 431, from right to left. The inside of the frame 432 is covered by the fourth and fifth cable covers 204 and 205 in order from the rear to the front. The second and third cable covers 202 and 203 can be fixed to the inner surface of the right rear standing frame 431 by any fixing means. The fourth and fifth cable covers 204 and 205 can be fixed to the inner surface of the right and left front frames 432 by any fixing means.

  The second cable 53 is hooked between the second cable cover 202 and the third cable cover 203 by the second, third, and fourth clips 4312, 4313, and 4314 in order from top to bottom. The fourth clips 4312 and 4314 are fixed to the inner surface of the right rear standing frame 431, respectively, and the third clip 4313 is fixed to the cabin rear panel surface (not shown).

As shown in FIG. 2, a window cover portion 4321 is formed on the right front and rear frames 432, and the second cable 53 is routed so as to avoid the window cover portion 4321. When it is not necessary to avoid the window cover portion 4321, a single cable cover may be used, or the second cable 53 may be covered with a plurality of fourth and fifth cable covers 204 and 205.
The window cover portion 4321 is a member that covers, for example, an outside air introduction filter window of an air conditioner. The second cable 53 is routed so as to avoid the window cover portion 4321, and does not hinder the opening and closing of the window of the outside air introduction filter formed on the right front and rear frames 432, and is excellent in maintainability.

  In addition, it is not limited to FIG. 2, and the number of the cable covers, the size of the concave section (cable storage size), and the long size can be set according to the routing route and the frame shape.

The monitor 7 is arranged on the front upper side of the main unit operation panel 461 (shown by a broken line) arranged on the right side of the center of the control unit 46 arranged in the cabin 43.
In the first embodiment, the monitor 7 is attached via a dedicated bracket 72 fixed to a cabin attachment seat 71 attached to the right front and rear frames 432 on the cabin 43 side. The monitor 7 can display a moving image captured by the imaging unit 5.

[Modification of First Embodiment]
Instead of using the second, third, and fourth clips 4312, 4313, 4314, another cable cover may be used, or in the right rear standing frame 431, a single cable cover may be used. May be covered.
Further, in the right rear standing frame 431, the first cable 51, the connector 52, and the second cable 53 are formed by a single cable cover without using the first, second, and third cable covers 201, 202, and 203. May be covered.
The fixing means for fixing each clip or each cable cover to the frame includes, for example, an adhesive, a screw, a screw, a bolt and the like.

[Deployment structure of Embodiment 2]
3A and 3B show a cable routing structure according to the second embodiment. 3A and 3B show components necessary for explaining the cable routing structure, and other components are omitted.
The second embodiment has a structure in which the first cable 51 and the second cable 53 are fixed to the inner surface of the frame with a plurality of clips, and are covered with the first and second panel covers 401 and 402 according to the frame shape from above. It is.

  Specifically, similarly to the first embodiment, the first cable 51 is guided upward through the top surface through-hole 63 of the rearview mirror mounting seat 6, is hooked by the first clip 4311a, and is located near the antenna mounting seat 81. Of the cabin 43 through the through hole 82.

  As shown in FIG. 3B, the first cable 51 is hooked by a first internal clip 301 inside the right rear standing frame 431, and the first internal clip 301 is fixed to an inner surface of the right rear standing frame 431. Is done.

  As in the first embodiment, a connector 52 is provided at the distal end of the first cable 51, and the second cable 53 connected to the connector 52 extends downward along the inside of the right rear standing frame 431, Further, it extends from the right rear to the right front of the control unit 46 along the inside of the right front and rear frames 432, and is connected to the monitor 7.

As shown in FIG. 3B, the second cable 53 is hooked by second, third, and fourth internal clips 302, 303, and 304 from top to bottom, and the second, third, and fourth internal clips 302 , 303, 304 are fixed to the inner side surface of the right rear standing frame 431.
Further, the second cable 53 is hung by third and fourth clips 4313 and 4314 in order from top to bottom, and the third clip 4313 is fixed to the rear panel surface (not shown) of the cabin, and the fourth clip 4314 Are fixed to the inner surface of the right rear standing frame 431, respectively.
In addition, the connector 52 is hooked by the fifth and sixth internal clips 305 and 306 in order from the top at two places in the vertical direction (at both ends of the small diameter in the present embodiment). The clips 305, 306 are fixed to the inner surface of the right rear standing frame 431.
The first to sixth internal clips 301 to 306 are provided at their tips with engaging projections 301a to 306a that penetrate through through holes (not shown) of the first panel cover 401, which will be described later, and that are detachably engaged.

The second cable 53 is guided from the right rear standing frame 431 to the right front and rear frames 432 and is hooked by first to eighth support clips 311 to 318. The first to eighth support clips 311 to 318 are connected to the right front and rear frames. 432 is fixed to the lower surface inside.
The first to eighth support clips 311 to 318 have first to eighth support grooves 311a to 318a into which lower edges 4023 of the second panel cover 402 described later are removably inserted.
The first to seventh support clips 311 to 317 are fixed to the lower part of the right front and rear frame 432 so that the first to seventh support grooves 311 a to 317 a face leftward. At the intermediate position of the height, the eighth support groove 318a is fixed so as to face obliquely upward.

A window cover portion 4321 is formed between the fourth support clip 314 and the fifth support clip 315, and a protection wall 4326 is provided upright from the right front and rear frames 432 to avoid this. 53 is guided from back to front along the protection wall 4326.
The window cover portion 4321 is a member that covers, for example, an outside air introduction filter window of an air conditioner. The second cable 53 is routed so as to avoid the window cover portion 4321, and does not hinder the opening and closing of the window of the outside air introduction filter formed on the right front and rear frames 432, and is excellent in maintainability.

In FIG. 3A, first and second panel covers 401 and 402 are provided.
The concave first panel cover 401 has four through holes at positions corresponding to the engagement projections 301a to 304a of the first to fourth internal clips 301 to 304, and the engagement projections 301a are formed in these through holes. To 304a are inserted and engaged and fixed. With this configuration, the first panel cover 401 covers the first cable 51, the connector 52, and the second cable 53, and is attached to the right rear standing frame 431.

The second panel cover 402 includes a hook portion 4021 that abuts on the top surface 4321 of the right front and rear frames 432 and is hooked, a main surface 4022 extending downward from the hook portion 4021 in an L shape, and a main surface 4022. And a lower edge portion 4023 extending rightward in an L-shape in the same direction as the hook portion 4021 from above.
The main surface 4022 has an opening 4022a formed between the fourth support clip 314 and the fifth support clip 315. The opening of the window of the outside air introduction filter can be opened and closed from the opening 4022a.

  The second panel cover 402 has, on its main surface 4022, four penetrating support portions 4025 erected in the longitudinal direction. The penetrating support portion 4025 is indicated by a broken line. A screw (not shown) may be inserted into the through-supporting portion 4025. Note that the number of the through-support portions 4025 of the second panel cover 402 is not limited to four, and may be at least two or more. The top surface 4025a of the penetrating support portion 4025 abuts on the inner surface 4322 of the right front and rear frames 432. The penetrating support portion 4025 supports the first to seventh support clips 311 to 317 so as to maintain the internal space of the second panel cover 402.

The hook 4021 of the second panel cover 402 is hooked on the top surface 4321 of the right front and rear frames 432, and the lower edge 4023 of the second panel cover 402 is connected to the first to eighth support clips 311 to 318. The support grooves 311a to 318a are fitted.
Thereby, the second panel cover 402 covers the second cable 53 and is attached to the right front and rear frames 432.

[Modification of Second Embodiment]
Although the first panel cover 401 is fixed by the first to fourth internal clips 301 to 304, the present invention is not limited to this, and may be fixed by other fixing means.
Further, the third and fourth clips 4313 and 4314 may be omitted.
The second panel cover 402 is fixed by the first to eighth support grooves 311a to 318a, but is not limited thereto, and may be fixed by other fixing means.
The right and left front frames 432 may include one or more hollow cylindrical portions, and the second panel cover 402 may include a protrusion that is removably inserted into and engaged with the hollow cylindrical portion.
The fixing means for fixing each clip or each panel cover to the frame includes, for example, an adhesive, a screw, a screw, a bolt, and the like.

[Another embodiment]
Although the first and second embodiments have been described with reference to the drawings, the specific configuration is not limited to these embodiments. The first and second embodiments are described not only by the above-described embodiment but also by the scope of the claims, and further include the meaning equivalent to the scope of the claims and all modifications within the scope.

The first cable 51 may be covered with a cable cover extending along the right rear standing frame 431 without using the first clip 4311a.
The imaging unit 5 may be attached to a wall panel between the left and right standing frames of the cabin 43, or may be attached to a ceiling support (ceiling frame) of the cabin 43.
In addition, the number of the imaging unit 5 is not limited to one, and a plurality of imaging units 5 may be provided, or may be provided at different positions in the cabin.

DESCRIPTION OF SYMBOLS 1 Mini excavator 2 Lower revolving body 201 First cable cover 203 Second cable cover 204 Third cable cover 205 Fourth cable cover 205 Fifth cable cover 3 Work machine 4 Upper revolving body 41 Counterweight 42 Rear bonnet 43 Cabin 401 First Panel cover 402 Second panel cover 431 Right rear standing frame 432 Right front and rear frame 44 Right bonnet 45 Engine 46 Control unit 461 This unit operation panel 5 Imaging unit 51 First cable 52 Connector 53 Second cable 6 Rearview mirror mounting seat 7 Monitor 71 Cabin mounting seat 72 Dedicated bracket 8 Antenna 81 Antenna mounting seat 82 Through hole

Claims (4)

An upper revolving body, a work vehicle having a lower traveling body that supports the upper revolving body to be free to rotate,
A counterweight located at the rear end of the upper revolving unit,
A rear hood erected from the counterweight,
A cabin that is erected from one of the left and right side portions of the upper revolving structure and from above the rear bonnet;
A side bonnet arranged on the other side of the left and right sides of the upper revolving unit,
An engine disposed at a rear portion of the upper revolving structure and surrounded by the rear hood and the side hood;
An imaging unit disposed behind the cabin and above the side bonnet.   The work vehicle according to claim 1, wherein the imaging unit is mounted on a rearview mirror mounting seat installed at an upper part behind the cabin.   The work vehicle according to claim 1, further comprising a display device configured to display an image captured by the imaging unit. Further comprising a wired cable connecting the imaging unit and the display device,
The cable is a frame of the cabin disposed on one of the left and right sides of the upper revolving structure, and is arranged along a frame on the other side of the left and right sides from the center of the work vehicle. The work vehicle according to any one of claims 1 to 3, which is arranged.

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