JP2019143334A - Cab and work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cab capable of suppressing tapping sound and splashing of rainwater to a window. A cab 5 includes a ceiling portion 22, a side drainage portion 67, and a drainage guide portion 68. The ceiling portion 22 has a base portion 51, a side protrusion portion 50, a rear protrusion portion 55, and a rear drainage portion 60. The base 51 covers the upper part of the internal space S. The lateral protrusion 50 is provided along at least one of the left edge 41c and the right edge 41d in the vehicle width direction Y, and protrudes upward from the base 51. The rear protrusion 55 is provided along the rear edge 41b and projects upward from the base 51. The rear drainage portion 60 is formed along the front-rear direction X by at least one of the distance G1 and the distance G2 between the lateral protrusion 50 and the rear protrusion 55. The side drainage portion 67 is arranged behind the rear drainage portion 60 and is formed along the vehicle width direction Y. The drainage guide unit 68 connects the rear drainage unit 60 and the side drainage unit 67. [Selection diagram] FIG. 10A

Description

  The present invention relates to a cab and a work machine.

  Conventionally, in a canopy for a construction machine, the roof is inclined obliquely downward from the front end side toward the rear end side, and rainwater falling on the roof flows to the rear end side of the roof along the inclination of the roof. It falls from the rear end (for example, refer to Patent Document 1).

Japanese Patent Laying-Open No. 2015-221969

Since the construction machine disclosed in Patent Document 1 is a small hydraulic excavator, there is no vehicle body behind the canopy, and rainwater falling from the rear end of the roof falls to the crawler track and the ground.
However, when the conventional roof structure is applied to a wheel loader or the like, since a hydraulic oil tank exists behind the cab, if rainwater that has dropped from the rear end of the roof falls on the cover that covers the hydraulic oil tank, the sound and There was a splash of rainwater on the window.

  An object of the present invention is to provide a cab and a work machine capable of suppressing sound hitting and splashing of rainwater to a rear window.

  A cab according to a first invention is a cab of a work machine having a space inside, and includes a ceiling portion, a side drainage portion, and a drainage guide portion. The ceiling part has a base, a side protrusion, a rear protrusion, and a rear drain. The base covers the space. The side protrusion is provided along at least one edge in the vehicle width direction and protrudes upward from the base. The rear protrusion is provided along the rear edge and protrudes upward from the base. The rear drainage portion is formed by the distance between the side protrusion and the rear protrusion. The side drainage part is disposed behind the rear drainage part and is formed along the vehicle width direction. The drainage guide unit connects the rear drainage unit and the lateral drainage unit.

  ADVANTAGE OF THE INVENTION According to this invention, the working machine using the cab and cab which can suppress a hammering sound and the splash of rainwater to a back window can be provided.

The side view which shows the wheel loader in embodiment concerning this invention. The top view of the wheel loader of FIG. The side view which shows the cab of the wheel loader of FIG. The top view which shows the cab of FIG. The rear view which shows the cab of FIG. FIG. 5 is a cross-sectional view taken along arrows VV ′ in FIG. 4. The perspective view which shows the ceiling part and cover member of the cab of FIG. The top view which shows the top plate of FIG. FIG. 8B is a cross-sectional view taken along the line AA ′ in FIG. 8A. FIG. 8B is a cross-sectional view taken along the line BB ′ in FIG. 8A. The top view which showed the area | region where the rain water of the top plate of FIG. 8A accumulates was shown by hatching. The enlarged view which shows the upper left part of the rear surface of the cab of FIG. The side view which shows the cab of FIG. 9A. The figure which shows the state which removed the cover member 32 from FIG. 9A. The side view which shows the cab of FIG. 10A. The figure which shows the upper part of the rear surface of the state which removed the cover member from the cab of FIG. The side view which shows the position of the hydraulic oil tank in the structure of the cab of the wheel loader of FIG. 1, and the back of a cab. FIG. 12B is a cross-sectional view taken along the line CC ′ in FIG. 12A.

A wheel loader according to an embodiment of the present invention will be described below with reference to the drawings.
<1. Configuration>
(1-1. Outline of configuration of wheel loader 1)
FIG. 1 is a schematic diagram showing a configuration of a wheel loader 1 according to the present embodiment. FIG. 2 is a plan view of the wheel loader 1 according to the present embodiment. As shown in FIGS. 1 and 2, the wheel loader 1 of the present embodiment includes a vehicle body frame 2, a work implement 3, a pair of front tires 4, a cab 5, an engine room 6, and a pair of rear tires 7, It has. In the following description, “front”, “rear”, “right”, “left”, “upper”, and “lower” indicate directions based on the state of looking forward from the driver's seat. “Vehicle width direction” and “left-right direction” are synonymous. A front-rear direction X and a vehicle width direction Y are illustrated. “Inner side in the vehicle width direction” indicates the center side in the vehicle width direction of the work machine, and “outer side in the vehicle width direction” indicates a side away from the center in the vehicle width direction of the work machine.

The wheel loader 1 performs an earth and sand loading operation using the working machine 3.
The body frame 2 is a so-called articulate type, and includes a front frame 11, a rear frame 12, and a connecting shaft portion 13. The front frame 11 is disposed in front of the rear frame 12. The connecting shaft portion 13 is provided at the center in the vehicle width direction Y, and connects the front frame 11 and the rear frame 12 so as to be able to swing. The pair of front tires 4 are attached to the left and right of the front frame 11. The pair of rear tires 7 are attached to the left and right of the rear frame 12.

The work machine 3 is driven by hydraulic oil from a work machine pump (not shown). The work machine 3 includes a boom 14, a bucket 15, a lift cylinder 16, and a bucket cylinder 17. The boom 14 is attached to the front frame 11. The bucket 15 is attached to the tip of the boom 14.
The lift cylinder 16 and the bucket cylinder 17 are hydraulic cylinders. One end of the lift cylinder 16 is attached to the front frame 11, and the other end of the lift cylinder 16 is attached to the boom 14. The boom 14 swings up and down by the expansion and contraction of the lift cylinder 16. One end of the bucket cylinder 17 is attached to the front frame 11, and the other end of the bucket cylinder 17 is attached to the bucket 15 via a bell crank 18. As the bucket cylinder 17 expands and contracts, the bucket 15 swings up and down.

  The cab 5 is placed on the rear frame 12. The engine room 6 is disposed on the rear frame 12 on the rear side of the cab 5, and is covered with a cover 6a. The engine room 6 houses a hydraulic oil tank 19 (see FIG. 12A described later), an engine, and the like.

(1-2. Cab 5)
FIG. 3 is a side view of the cab 5. FIG. 4 is a plan view of the cab 5. FIG. 5 is a rear view of the cab 5. FIG. 6 is a cross-sectional view taken along the line VV ′ in FIG. In FIG. 6, the driver's seat, the door, and the like of the cab 5 are omitted.
As shown in FIG. 3, the cab 5 has a space S therein. The space S includes a driver's seat, a steering wheel lever for steering operation, a joystick lever, a lever for operating the work machine 3, and various types. A display device and the like are arranged.
As shown in FIG. 3, the cab 5 includes a floor portion 21, a ceiling portion 22, a pair of left and right front pillars 23, a pair of left and right rear pillars 24, a front window 25, a rear window 26, and a front panel portion. 27, a rear panel portion 28, a door 29, a drainage guide member 31 (see FIG. 5), a cover member 32, and a frame portion 33.

  The floor 21 is located below the internal space S and constitutes the floor of the driver's seat. The floor portion 21 is fixed to the rear frame 12. The ceiling part 22 is located above the internal space S and faces the floor part 21. The front pillar 23 and the rear pillar 24 are each composed of a pair of left and right. The front pillar 23 has a left front pillar and a right front pillar. The rear pillar 24 has a left rear pillar and a right rear pillar. The front pillar 23 and the rear pillar 24 are arranged in the vertical direction. The front window 25 is located in front of the driver's seat. The rear window 26 is located behind the driver seat. The front panel portion 27 is disposed below the front window 251 at the center of the front window 25. The rear panel portion 28 is disposed below the rear window 26. The doors 29 are disposed on the left side and the right side of the cab 5. As shown in FIG. 9A described later, the drainage guide member 31 is disposed on the rear side of the ceiling portion 22 and guides the drainage of the rainwater that has dropped onto the ceiling portion 22 to the side. The cover member 32 covers the drainage guide member 31. The frame portion 33 is provided on the lower side along the peripheral edge of the ceiling portion 22, and the front pillar 23, the rear pillar 24, the front window 25, the rear window 26, and the like are fixed thereto.

(1-3. Ceiling part 22)
FIG. 7 is a perspective view showing the ceiling portion 22 and the cover member 32. As illustrated in FIG. 7, the ceiling portion 22 includes a top plate 41, a side plate 43, and a side plate 44.
As shown in FIGS. 4 and 7, the top plate 41 has a substantially quadrangular shape in plan view, and a pair of opposing edges (front edge 41 a and rear edge 41 b) are arranged in the front-rear direction X. The other set of edges (left edge 41c and right edge 41d) is arranged in the vehicle width direction Y.

  The side plate 43 is fixed to the rear side of the left edge 41 c of the top plate 41 and below the top plate 41. The side plate 43 is disposed along the front-rear direction X substantially perpendicular to the top plate 41. As shown in FIG. 7, the side plate 44 is fixed to the rear portion of the right edge 41 d and below the top plate 41. The side plate 44 is disposed along the front-rear direction X substantially perpendicular to the top plate 41. The side plate 43 and the side plate 44 are disposed to face each other in the vehicle width direction Y.

The top plate 41 is formed by pressing a single plate. FIG. 8A is a plan view showing the top plate 41. FIG. 8B is a cross-sectional view taken along the line AA ′ in FIG. 8A. FIG. 8C is a cross-sectional view taken along the line BB ′ in FIG. 8A.
As shown in FIGS. 7 and 8A, the top plate 41 includes a base 51, a front protrusion 52, a side protrusion 50, a rear protrusion 55, a rear drain 60, a central protrusion 58, Ribs 59a to 59e.

The base 51 is disposed so as to cover the space S of the cab 5. The front protrusion 52 is formed so as to protrude upward from the base 51 along the front edge 41 a of the top plate 41.
The side protrusions 50 are provided along at least one edge in the vehicle width direction Y, and protrude upward from the base 51. The side protrusion 50 includes a left protrusion 53 and a right protrusion 54. The left side protruding portion 53 is formed so as to protrude upward from the base portion 51 along the left edge 41 c of the top plate 41. The right side protruding portion 54 is formed so as to protrude upward from the base portion 51 along the right edge 41 d of the top plate 41. The rear protrusion 55 is formed so as to protrude upward from the base 51 along the rear edge 41 b of the top plate 41.

The left end of the front protrusion 52 and the left protrusion 53 are connected. The right end of the front protrusion 52 and the right protrusion 54 are connected.
The left end 55c of the rear protrusion 55 is not connected to the rear end 53b of the left protrusion 53, and a predetermined gap G1 is formed. Further, the right end 55d of the rearward projecting portion 55 is not connected to the rear end 54b of the rightward projecting portion 54, and a predetermined gap G2 is formed.

The rear drain 60 is formed by the distance between the side protrusion 50 and the rear protrusion 55. The rear drainage unit 60 includes a left rear drainage unit 56 and a right rear drainage unit 57.
The left rear drainage part 56 is formed by the gap G1 described above, and is surrounded by the left end 55c of the rear protrusion part 55, the rear end 53b of the left side protrusion part 53, and the base part 51. The left rear drainage part 56 has a groove shape in which the left end 55 c and the rear end 53 b constitute a side wall and the base part 51 constitutes a bottom surface, and is formed along the front-rear direction X.

The right rear drain portion 57 is formed by the above-described gap G <b> 2 and is surrounded by the right end 55 d of the rear protrusion 55, the rear end 54 b of the right side protrusion 54, and the base 51. The right rear drain 57 has a groove shape in which the right end 55d and the rear end 54b form a side wall, and the base 51 forms a bottom surface, and is formed along the front-rear direction X.
The central protruding portion 58 is provided on the front side of the rear protruding portion 55. The left end 58c of the central protrusion 58 is not connected to the left protrusion 53, and a predetermined gap G3 is formed. Further, the right end 58d of the central protrusion 58 is not connected to the right protrusion 54, and a predetermined gap G4 is formed.

  The ribs 59 a to 59 e are formed in a portion surrounded by the front protrusion 52, the left protrusion 53, the right protrusion 54, and the center protrusion 58 of the base 51. The ribs 59a to 59e protrude upward from the base 51. The rib 59a is formed between the front protrusion 52 and the center protrusion 58 along the front-rear direction X at the center in the vehicle width direction Y. The rib 59b is formed along the front-rear direction X on the left side in the vehicle width direction Y of the rib 59a. The rib 59c is formed along the front-rear direction X on the right side of the rib 59a in the vehicle width direction Y. The rib 59d is formed along the front-rear direction X on the outer side (left side) in the vehicle width direction Y of the rib 59b. The rib 59e is formed along the front-rear direction X on the outer side (right side) in the vehicle width direction Y of the rib 59c.

The base 51 is curved so that the center in the vehicle width direction Y protrudes upward. Since the curvature is small, it is difficult to understand in FIG. 8B, and therefore, a state of being curved at line L1 in FIG. As a result, the rainwater that has fallen on the top plate 41 moves to the left side protruding part 53 or the right side protruding part 54.
Further, the base 51 is curved so that the rear height is lower than the front. Since the curvature is small, it is difficult to understand in FIG. 8C, and therefore, a state of being curved at line L2 in FIG. 8C is shown.

The rainwater that has moved to the left-side protruding portion 53 or the right-side protruding portion 54 due to the curve in the vehicle width direction Y (see the line L1) moves backward through the spaces G3 and G4 due to the curve (see the line L2). .
FIG. 8D is a plan view of the top board 41, in which rainwater accumulation regions are indicated by hatching. As shown in FIG. 8D, rainwater appears in the region R surrounded by the front protrusion 52, the left protrusion 53, the right protrusion 54, the rear protrusion 55, the center protrusion 58, and the ribs 59 a to 59 e. Accumulates. Rainwater that has fallen into the region R moves to the left side protruding portion 53 or the right side protruding portion 54 by a curve (see the line L1), and then moves backward through the intervals G3 and G4 by the curve (see the line L2). Then, it is discharged from the left rear drainage portion 56 and the right rear drainage portion 57 to the rear of the top plate 41 (see arrows J and K).

(1-4. Frame part 33)
The frame portion 33 is disposed below the top plate 41 of the ceiling portion 22 and along the periphery of the top plate 41 (front edge 41a, rear edge 41b, left edge 41c, and right edge 41d). The frame part 33 has a plurality of frame members 331 arranged along the periphery of the top plate 41. A portion of the frame member 331 is shown in FIGS. 3, 6 and 9A. A front pillar 23, a rear pillar 24, a front window 25 and a rear window 26, which will be described later, and the like are attached to the frame member 331.

(1-5. Front pillar 23, rear pillar 24)
As shown in FIGS. 3 and 6, the front pillar 23 is disposed along the vertical direction so as to connect the floor portion 21 and the frame portion 33, and supports the ceiling portion 22 via the frame portion 33. . The front pillars 23 are arranged on both the left and right sides of the cab 5 in the vehicle width direction Y. The front pillar 23 is disposed in front of the cab 5 in the front-rear direction X.

  The rear pillar 24 is arranged along the vertical direction so as to connect the floor portion 21 and the frame portion 33, and supports the ceiling portion 22 via the frame portion 33. The rear pillars 24 are arranged on both the left and right sides of the cab 5 in the vehicle width direction Y. The rear pillar 24 is disposed behind the front pillar 23 with a predetermined interval. The rear pillar 24 is disposed behind the cab 5 in the front-rear direction X.

(1-6. Front window 25)
The front window 25 is provided between the left and right front pillars 23 and is disposed in front of the driver's seat. As shown in FIG. 4, the front window 25 includes a front window 251 and a pair of front side windows 252. The front window 25 is disposed in front of the driver's seat. The front side windows 252 are disposed on both sides of the front window 251 in the vehicle width direction Y.

  That is, the left front side window 252 is disposed between the front window 251 and the left front pillar 23, and the right front side window 252 is disposed between the front window 251 and the right front pillar 23. Yes. The front window 251 is provided from a lower frame member 331 (see FIG. 3) of the ceiling portion 22, and a front panel portion 27 is provided from the lower side of the front window 251 to the floor portion 21. The front side window 252 is disposed from the ceiling portion 22 to the floor portion 21. Sealing is provided between the front window 251 and the front side windows 252 on both sides thereof.

(1-7. Rear window 26)
As shown in FIG. 5, the rear window 26 is provided between the left and right rear pillars 24 and is disposed behind the driver's seat. The rear window 26 includes a rear window 261 and a pair of rear windows 262. The rear window 261 is disposed on the back of the driver's seat. The rear side windows 262 are disposed on both sides of the rear window 261 in the vehicle width direction Y.

  That is, the left rear side window 262 is disposed between the rear window 261 and the left rear pillar 24, and the right rear side window 262 is disposed between the rear window 261 and the right rear pillar 24. Yes. The rear window 261 and the two rear side windows 262 are arranged from a frame member 331 on the lower side of the ceiling portion 22 (see FIG. 9A described later), and the floor window 261 and the two rear side windows 262 are arranged from below the floor. A rear panel portion 28 is provided up to the portion 21. Sealing is provided between the rear window 261 and the rear windows 262 on both sides thereof. Further, as shown in FIG. 3, the rear window 261 is inclined so as to go backward as it goes upward.

(1-8. Door 29, right side window 30)
As shown in FIG. 3, the door 29 is provided between the front pillar 23 on the left side and the rear pillar 24 on the left side, and rotates around a hinge 291 provided on the rear pillar 24. .
The door 29 is provided on the right side of the cab 5 between the front pillar 23 on the right side and the rear pillar 24 on the right side, similarly to the left side. The door 29 on the cab left side and the door 29 on the cab right side are disposed so as to face each other.

(1-9. Drainage guide member 31)
FIG. 9A is an enlarged view of the upper left side of the rear surface of the cab 5. FIG. 9B is a side view of FIG. 9A. FIG. 10A is an enlarged view of the upper left side of the rear surface of the cab 5 and shows a state where the cover member 32 is removed. FIG. 10B is a side view of FIG. 10A. FIG. 11 is a view showing the upper part of the back surface in a state where the cover member 32 is removed from the cab 5. In FIG. 11, the central portion of the cab 5 in the vehicle width direction Y is omitted.

  The drainage guide member 31 is attached to the rear side of the top plate 41. As shown in FIG. 11, the drainage guide member 31 is a member that is long in the vehicle width direction Y, and is fixed to the top plate 41. The drainage guide member 31 is fixed to the rear portion 43b of the side plate 43 by the bolt 101 shown in FIGS. 10B and 11, and is fixed to the rear portion 44b of the side plate 44 by the bolt 102 shown in FIG.

As shown in FIG. 11, the drainage guide member 31 includes a lateral drainage portion 67, a drainage guide portion 68, and a wraparound suppression portion 69. As shown in FIG. 10A, the side drainage part 67 is disposed behind the rear drainage part 60 and is formed along the vehicle width direction Y. The drainage guide unit 68 connects the rear drainage unit 60 and the side drainage unit 67.
The side drainage part 67 has a left side drainage part 61 and a right side drainage part 64. The drainage guide part 68 includes a left drainage guide part 62 and a right drainage guide part 65. The wraparound suppression unit 69 includes a left wraparound suppression unit 63 and a right wraparound suppression unit 66. As shown in FIG. 11, the drainage guide member 31 is provided with a left side drainage portion 61, a left drainage guide portion 62, and a left turn-in suppression portion 63 at the end portion on the left side surface. A right side drainage portion 64, a right drainage guide portion 65, and a right turn around suppression portion 66 are provided at the end on the side.

A left side structure provided with a left side drainage portion 61, a left drainage guide portion 62, and a left turn around suppression portion 63, a right side drainage portion 64, a right drainage guide portion 65, and a right turn around suppression portion 66 are provided. Since the configuration on the right side surface provided is formed symmetrically with respect to the front-rear direction X, the configuration on the left side surface will be described in detail with reference to the drawings.
As shown in FIG. 10A, the left side drainage part 61 is formed by a gap G5 formed so as to be opposed to the vehicle width direction Y, and drains rainwater to the side (left side).

  The left drainage guide unit 62 guides rainwater from the left rear drainage unit 56 of the top plate 41 to the left side drainage unit 61. The left drain guide 62 has a side wall 71, a side wall 72, and a bottom surface 73. The side wall 71 is formed along the front-rear direction X from the left end 55 c of the rear protrusion 55 that forms the left rear drain portion 56 toward the rear. The side wall 72 is formed from the rear end of the side wall 71 toward the outside (left direction in FIG. 10A) along the vehicle width direction Y. The side wall 72 is disposed so as to face the left rear drainage part 56. The bottom surface 73 forms a bottom surface of a flow path through which rainwater discharged from the left rear drainage part 56 flows, and is connected to the lower ends of the side wall 71 and the side wall 72.

The left side drainage 61 is formed between the rear end 53b of the left side protrusion 53 and the end 72e outside the side wall 72 (leftward in FIG. 10A) (the above-mentioned interval G5). In other words, the left side drainage 61 is surrounded by the rear end 53b of the left side protrusion 53, the end 72e of the side wall 72, and the end 73e outside the bottom surface 73 (leftward in FIG. 10A). .
The left turn-in suppressing portion 63 is a plate-like portion that extends downward from the end 73 e of the bottom surface 73. The left turn-in suppressing portion 63 is formed substantially perpendicular to the bottom surface 73. Accordingly, it is possible to prevent rainwater drained from the left side drainage unit 61 from traveling around the lower side of the end 73e of the bottom surface 73 and passing through the rear side window 262.

As shown in FIG. 11, the right side drainage portion 64 on the right side is formed by a gap G6 formed so as to be opposed to the vehicle width direction Y, and rainwater is laterally (rightward side). Drain.
The right drain guide 65 guides rainwater from the right rear drain 57 of the top plate 41 to the right drain 64. The right drain guide 65 has a side wall 71, a side wall 72, and a bottom surface 73, similar to the left drain guide 62. The side wall 71 (not shown in FIG. 11) is formed along the front-rear direction X from the right end 55 d of the rear protrusion 55 constituting a part of the right rear drain 57 toward the rear. As shown in FIG. 11, the side wall 72 is formed from the rear end of the side wall 71 toward the outside (right direction) along the vehicle width direction Y. The side wall 72 is disposed so as to face the right rear drain 57. The bottom surface 73 (not shown in FIG. 11) forms the bottom surface of the flow path through which rainwater discharged from the right rear drain 57 is connected, and is connected to the side walls 71 and the lower ends of the side walls 72.

The right side drainage portion 64 is formed between the rear end 54b of the right side protruding portion 54 and the end 72e on the outer side (right direction) of the side wall 72 (interval G6 described above). In other words, the right side drainage part 64 is formed by being surrounded by the rear end 54 b of the right side protruding part 54, the end 72 e of the side wall 72, and the end 73 e outside the bottom surface 73.
The right turn-in suppressing portion 66 is a plate-like portion that extends downward from the outer end 73 e of the bottom surface 73. The right turn around suppressing portion 66 is formed substantially perpendicular to the bottom surface 73. Accordingly, it is possible to prevent rainwater drained from the right side drainage portion 64 from traveling around the lower side of the end 73 e of the bottom surface 73 and passing through the rear side window 262.

(1-10. Cover member 32)
The cover member 32 covers the upper side, the left side, and the right side of the drainage guide member 31. The cover member 32 is fixed to the drainage guide member 31 by bolts 104 shown in FIGS. 4 and 9B. As shown in FIG. 7, the cover member 32 has an upper portion 81, a left side portion 82, and a right side portion 83.

The upper portion 81 is formed long in the vehicle width direction Y so as to be along the drainage guide member 31 on the upper side of the drainage guide member 31.
The left side portion 82 is formed downward from the left end of the upper portion 81. As shown in FIG. 9A, the left side portion 82 is disposed on the outer side (left side) of the left side drainage portion 61, and the rainwater discharged from the left side drainage portion 61 is the left side portion 82 and the left wraparound suppression portion. Falls through 63 (see arrow D).

  As shown in FIG. 7, the right side portion 83 is formed downward from the right end of the upper portion 81. Although not shown in the drawing, the right side portion 83 is disposed outside (right side) the right side drainage portion 64 in the same manner as the left side portion 82, and rainwater discharged from the right side drainage portion 64 is disposed on the right side portion 83. And falls through between the right turn suppression part 66.

<2. Action>
Rainwater that has fallen on the top plate 41 of the cab 5 moves to the left side protruding portion 53 or the right side protruding portion 54 by the curve in the vehicle width direction Y of the base portion 51 (see the line L1), and then the longitudinal direction X of the base portion 51 Is moved rearward through the gaps G3 and G4 by the curve (see line L2), and discharged from the left rear drainage portion 56 and the right rear drainage portion 57 to the rear of the top plate 41.
Rainwater drained from the left rear drain 56 flows on the bottom surface 73 along the side wall 71 as shown by an arrow E in FIG. 10A, collides with the side wall 72 and is guided to the left side, and the left side drain 61 To the left along the anti-rotation part 63. Further, rainwater drained from the right rear drain 57 flows on the bottom surface 73 along the side wall 71, collides with the side wall 72, is guided to the right side, and flows from the right side drain 64 to the right turn-in suppression unit 66. Fall down along.

FIG. 12A is a side view showing the position of the hydraulic oil tank 19 in the configuration of the cab 5 and the rear of the cab 5. In FIG. 12A, the rear tire 7 is omitted. 12B is a cross-sectional view taken along the line CC ′ in FIG. 12A.
As shown in FIGS. 12A and 12B, a hydraulic oil tank 19 is disposed behind the cab 5. Further, since the rear window 261 is inclined so as to go rearward as it goes upward, the rear edge 41 b of the ceiling portion 22 of the cab 5 is located above the hydraulic oil tank 19.

As shown in FIG. 12B, the rainwater discharged from the left rear drainage portion 56 is located at a position P2 where the cover 6a on the left side is inclined with respect to the position P1 on the upper side of the hydraulic oil tank 19 as indicated by an arrow F. Fall into. Further, as shown by an arrow H, rainwater discharged from the right rear drain 57 falls to a position P3 where the right side cover 6a is inclined with respect to the position P1 on the upper side of the hydraulic oil tank 19.
Thus, by guiding the rainwater drained from the left rear drainage portion 56 and the right rear drainage portion 57 by the drainage guide member 31 to the side, it can be prevented from falling to the upper part of the hydraulic oil tank 19, It is possible to suppress rainwater noise and rainwater jumping to the window.

<3. Features>
(3-1)
The cab 5 of the present embodiment is a cab 5 of a work machine having an internal space S, and includes a ceiling portion 22, a side drainage portion 67, and a drainage guide portion 68. The ceiling part 22 has a base part 51, a side protrusion part 50, a rear protrusion part 55, and a rear drain part 60. The base 51 covers the upper part of the internal space S. The side protrusions 50 are provided along at least one of the left edge 41c and the right edge 41d (an example of at least one edge) in the vehicle width direction Y, and protrude upward from the base 51. The rear protrusion 55 is provided along the rear edge 41 b and protrudes upward from the base 51. The rear drainage portion 60 is formed along the front-rear direction X by at least one of the gap G1 and the gap G2 between the side protrusion 50 and the rear protrusion 55. The lateral drainage part 67 is disposed behind the rear drainage part 60 and is formed along the vehicle width direction Y. The drainage guide unit 68 connects the rear drainage unit 60 and the lateral drainage unit 67.

As a result, the rainwater that has fallen on the ceiling portion 22 is discharged from the rear drainage portion 60 to the rear of the ceiling portion 22 and then guided to the side drainage portion 67 by the drainage guide portion 68 and falls to the side of the cab 5. To do.
For this reason, even if the hydraulic oil tank 19 is provided behind the cab 5, for example, it does not fall on the cover 6a of the portion covering the hydraulic oil tank 19, so that the hitting sound and the splash of rainwater to the window are suppressed. can do.

(3-2)
In the cab 5 according to the present embodiment, the side protrusion 50 includes a left side protrusion 53 (an example of a first side protrusion) and a right side protrusion 54 (an example of a second side protrusion). Have. The left side protruding portion 53 and the right side protruding portion 54 are provided along each of the left edge 41c and the right edge 41d (an example of both edges) in the vehicle width direction Y. The rear drainage unit 60 includes a left rear drainage unit 56 (an example of a first rear drainage unit) and a right rear drainage unit 57 (an example of a second rear drainage unit). The left rear drainage part 56 is formed by a gap G1 between the left side protrusion part 53 and the rear protrusion part 55. The right rear drain 57 is formed by a gap G <b> 2 between the right side protrusion 54 and the rear protrusion 55. The lateral drainage unit 67 includes a left side drainage unit 61 (an example of a first lateral drainage unit) and a right side drainage unit 64 (an example of a second lateral drainage unit). The right drainage portion 64 is provided for the rear drainage portion 56, and the right side drainage portion 64 is provided for the right rear drainage portion 57. The drainage guide 68 includes a left drainage guide 62 (an example of a first drainage guide) and a right drainage guide 65 (an example of a second drainage guide). The left drainage guide unit 62 connects the left side drainage unit 61 and the left rear drainage unit 56. The right drainage guide unit 65 connects the right side drainage unit 64 and the right rear drainage unit 57.
As described above, the side drainage portion and the drainage guide portion are provided for both the left rear drainage portion 56 and the right rear drainage portion 57. Thereby, rainwater can be dropped from both sides of the cab 5.

(3-3)
The cab 5 according to the present embodiment further includes a cover member 32. The cover member 32 covers the left drainage portion 61, the right drainage portion 64, the left drainage guide portion 62, and the right drainage guide portion 65.
Thereby, the cab 5 excellent in design can be provided.

(3-4)
In the cab 5 according to the present embodiment, the base 51 is curved so that the center in the vehicle width direction Y protrudes upward, as indicated by a line L1 in FIG. 8B.
Thereby, rainwater can be collected in the left side protrusion part 53 and the right side protrusion part 54 provided on both sides in the vehicle width direction Y.

(3-5)
In the cab 5 according to the present embodiment, the base 51 is curved so that the rear height is lower than the front, as indicated by a line L2 in FIG. 8C.
Thereby, rainwater can be collected in the back protrusion part 55 provided in back.
(3-6)
The cab 5 according to the present embodiment further includes a rear window 261 and a rear window 262. The rear window 261 is disposed on the rear surface. The rear side window 262 is disposed adjacent to both sides of the rear window 261.
Since the splash of rainwater can be suppressed, the visibility of the rear window 261 and the rear window 262 can be enhanced.

(3-7)
In the cab 5 according to the present embodiment, the drainage guide portion 68 includes a side wall 71 (an example of a first side wall), a side wall 72 (an example of a second side wall), and a bottom surface 73. The side wall 71 is formed rearward from a position corresponding to the left end 55c or the right end 55d of the rear protrusion 55 (an example of an inner edge of the rear discharge portion in the vehicle width direction). The side wall 72 is formed from the rear end of the side wall 71 toward the side. The bottom surface 73 is connected to the side wall 71 and the side wall 72. The side drainage part 67 is formed by a gap G5 or a gap G6 provided between the side protrusion 50 and the side wall 72.
Thereby, rainwater can be guided from the rear drainage part 60 to the side drainage part 67.

(3-8)
The cab 5 according to the present embodiment further includes a wraparound suppressing portion 69 (an example of an extending portion). The wraparound suppressing portion 69 extends downward from the bottom surface 73 of the drainage guide portion 68 in the side drainage portion 67.
Thereby, since rainwater falls below along the wraparound suppression part 69, it can suppress that rainwater wraps around the side drainage part 67, falls along a window, and falls below.

(3-9)
A wheel loader 1 (an example of a work machine) according to the present embodiment includes a cab 5, a hydraulic oil tank 19, and a cover 6a (an example of a cover part). The hydraulic oil tank 19 is disposed behind the cab 5. The cover 6 a covers the hydraulic oil tank 19.
Thereby, since the fall of the rainwater to the part which covers the hydraulic oil tank 19 of the cover 6a can be suppressed, generation | occurrence | production of the hitting sound and the splashing of the rainwater to a window can be reduced.

<4. Other embodiments>
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the above embodiment, the side protrusion 50 has the left side protrusion 53 and the right side protrusion 54, but may have only one of them, and the rear drain part 60 Although it has the back drainage part 56 and the right back drainage part 57, you may have only either one. Moreover, in the said embodiment, although the side drainage part 67 has the left side drainage part 61 and the right side drainage part 64, it may have only one or the drainage guide part 68, The left drainage guide part 62 and the right drainage guide part 65 are provided, but only one of them may be provided.

Moreover, in the said embodiment, although the wraparound suppression part 69 has the left wraparound suppression part 63 and the right wraparound suppression part 66, either one does not need to be provided, and both It does not have to be provided.
Further, when the top plate 41 is not provided with one of the left rear drainage portion 56 and the right rear drainage portion 57, the curvature of the base 51 described in FIG. 8B is curved in the direction in which the rear drainage portion is formed. It only has to be. Also, the left drainage 61, the right drainage 64, the left drainage guide 62, and the right drainage guide 65 need only be formed on the side where the rear drainage is provided.
Furthermore, the base 51 is not limited to being curved in the vehicle width direction Y, and may be inclined.
Further, the base 51 is not limited to bend in the front-rear direction X, and may be inclined.

(B)
In the above embodiment, the left side drainage portion 61 and the right side drainage portion 64 are provided outside the left rear drainage portion 56 and the right rear drainage portion 57 in the vehicle width direction Y. In short, it is only necessary to prevent rainwater from falling on the upper side of the hydraulic oil tank 19 (or the cover 6a).

(C)
In the embodiment described above, the side wall 71 is formed along the front-rear direction X, and the side wall 72 is formed along the vehicle width direction Y. However, the present invention is not limited to this. The side wall 72 may be inclined rearward as it goes outward.
Moreover, in the said embodiment, although the bottom face 73 is formed horizontally, it is not restricted to this, You may incline.

(D)
In the above-described embodiment, the left turning-in suppressing unit 63 and the right turning-in suppressing unit 66 are formed in the vertical direction downward, but may not be limited to the vertical direction as long as rainwater does not enter. You may incline toward the outer side in the vehicle width direction Y as it goes below.

(E)
In the above embodiment, the wheel loader 1 has been described as an example of a work machine. However, the present invention is not limited to this and may be a hydraulic excavator, a bulldozer, a motor grader, or the like, and a machine having a cab. Can be applied.

  The cab of the present invention has an effect capable of suppressing sound hitting and splashing of rainwater to the window, and can be widely applied to, for example, work machines.

5: Cab 22: Ceiling 50: Side protrusion 51: Base 53: Left protrusion 54: Right protrusion 55: Back protrusion 56: Left rear drain 57: Right rear drain 61: Left drain Part 62: Left drainage guide part 64: Right side drainage part 65: Right drainage guide part 67: Side drainage part 68: Drainage guide part

Claims (9)

A work machine cab having a space inside,
A base that covers the space above;
A lateral protrusion provided along at least one edge in the vehicle width direction and protruding upward from the base;
A rear projecting portion provided along a rear edge and projecting upward from the base;
A ceiling part having a rear drainage part formed by a distance between the side protrusion part and the rear protrusion part;
A lateral drainage portion disposed behind the rear drainage portion and formed along the vehicle width direction; and
A drainage guide part connecting the rear drainage part and the lateral drainage part,
Cab. The lateral protrusion has a first lateral protrusion and a second lateral protrusion provided along each of both edges in the vehicle width direction,
The rear drainage portion is formed by a distance between the first rear drainage portion formed by the interval between the first lateral protrusion portion and the rearward protrusion portion, and the second lateral projection portion and the rearward protrusion portion. A second rear drainage section,
The lateral drainage section includes a first lateral drainage section provided for the first rear drainage section and a second lateral drainage section provided for the second rear drainage section,
The drainage guide unit includes a first drainage guide unit that connects the first lateral drainage unit and the first rear drainage unit, and a second drainage guide unit that connects the second lateral drainage unit and the second rear drainage unit. And having
The cab according to claim 1. A cover member that covers the side drainage portion and the drainage guide portion;
The cab according to claim 1. The base is curved so that the center in the vehicle width direction protrudes upward,
The cab according to any one of claims 1 to 3. The base is curved so that the height behind it is lower than the front,
The cab according to any one of claims 1 to 4. A rear window arranged on the rear surface;
A rear side window disposed adjacent to both sides of the rear window, and
The cab according to any one of claims 1 to 5. The drainage guide is
A first side wall formed rearward from a position corresponding to an inner edge of the rear drainage portion in the vehicle width direction;
A second side wall formed laterally from a rear end of the first side wall;
A bottom surface connected to the first side wall and the second side wall;
The lateral drainage portion is formed by a gap provided between the lateral protrusion and the second side wall.
The cab according to claim 1. In the lateral drainage part further comprises an extension part extending downward from the bottom surface of the drainage guide part,
The cab according to any one of claims 1 to 7. The cab according to any one of claims 1 to 8,
A hydraulic oil tank disposed behind the cab;
A cover portion that covers the hydraulic oil tank,
Work machine.

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