WO2024084814A1

WO2024084814A1 - Cab and work vehicle

Info

Publication number: WO2024084814A1
Application number: PCT/JP2023/030924
Authority: WO
Inventors: 宗一郎村上; 裕史小瀧; 浩史永見; 隼人木下
Original assignee: 株式会社小松製作所
Priority date: 2022-10-19
Filing date: 2023-08-28
Publication date: 2024-04-25

Abstract

A cab (9) of a bulldozer (1) comprises: a seat (10); rear pillars (14); and a rear surface window (19). The rear pillars (14) are disposed behind the seat (10). The rear surface window (19) overhangs rearward from the rear pillars (14). The rear pillars (14) each include a slanted section (54) which is disposed inside in the vehicle width direction (B), and which, in plan view, is slanted so as to be positioned more toward the outside going toward the rear. The rear surface window (19) includes rear side windows (24) which, in plan view, are slanted so as to be positioned more toward the inside going toward the rear from a rear-end position (54a) of the slanted section (54). The rear side windows (24) are positioned relative to an eye point (E) of the seat (10).

Description

Cab and vehicle

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

Work vehicles such as bulldozers used at construction sites often perform reverse driving tasks, so rear visibility must be ensured. For example, in the cab of Patent Document 1, the rear pillar is positioned forward of the rear end of the cab to ensure rear visibility.

JP 2021-165489 A

However, the rear pillars obstruct rear visibility, so further improvements in rear visibility are needed.

An object of the present disclosure is to provide a cab and a work vehicle with improved rear visibility.
(Means for solving the problem)

A cab according to a first aspect of the present disclosure is a cab for a work vehicle, and includes a seat, a rear pillar, and a rear window. The rear pillar is disposed behind the seat. The rear window projects rearward from the rear pillar. The rear pillar is disposed on the inside in the vehicle width direction and has an inclined portion that is inclined so as to be positioned outward as it moves rearward in a plan view. The rear window has a rear side window that is inclined so as to be positioned inward as it moves rearward in a plan view from the rear end position of the inclined portion. The rear side window faces a predetermined position of the seat.
(Effect of the invention)

This disclosure makes it possible to provide a cab and work vehicle with improved rear visibility.

FIG. 1 is a perspective view showing a bulldozer according to an embodiment of the present disclosure. FIG. 2 is a side view showing a cab of an embodiment according to the present disclosure. 3 is a cross-sectional view taken along the arrows CC in FIG. 2 . FIG. 2 is a rear perspective view of the cab according to the embodiment of the present disclosure. FIG. 4B is a view of FIG. 4A with the rear window removed. 5A is a cross-sectional perspective view of the vicinity of the right rear pillar as viewed from the right rear, and FIG. 5B is a view of FIG. 5A with the rear window removed. 6A is a cross-sectional perspective view of the vicinity of the right rear pillar as viewed from the right front, and FIG. 6B is a view of FIG. 6A with the rear window removed. 5(a) is a perspective view showing only the rear pillar 14 of FIG. 5(b), and FIG. FIG. 2A is a top view of the rear pillar, and FIG. 2B is a rear view of the rear pillar as viewed from behind. FIG. 2 is a perspective cross-sectional view of a rear pillar from inside the cab of an embodiment according to the present disclosure. FIG. 4 is a partial enlarged view of FIG. 3 for explaining the eye point of the operator.

The travel drive device of the embodiment disclosed herein will be described with reference to the drawings.

<Configuration>
(Outline of Bulldozer 1)
1 is a perspective view showing a bulldozer 1 (an example of a work vehicle) according to this embodiment. The bulldozer 1 has a vehicle body 2, a work implement 3, a ripper device 4, and a traveling device 5.

The working machine 3 is disposed in front of the vehicle body 2. The working machine 3 has a blade 6 for performing tasks such as digging up soil and sand. The ripper device 4 is disposed in the rear of the vehicle body 2. The ripper device 4 has a claw portion 7 for crushing rocks and the like.

As shown in FIG. 1, the vehicle body 2 has a vehicle body frame 8 and a cab 9. The traveling device 5 is disposed on the vehicle body frame 8. The traveling device 5 has a pair of left and right tracks 5a. In FIG. 1, only the track 5a on the left side is shown.

The cab 9 is disposed above the vehicle body frame 8. In this embodiment, front, rear, left and right are described based on the driver's seat of the cab 9. The direction in which the driver's seat of the cab 9 faces directly ahead is the forward direction A1, and the direction opposite to the forward direction A1 is the rear direction A2. The front and rear directions are indicated by A. The left and right sides when the driver's seat faces directly ahead are respectively indicated by left direction B1 and right direction B2. The left and right direction is also referred to as the vehicle width direction, and is indicated by B.

(Cab 9)
Fig. 2 is a side view of the cab 9. Fig. 3 is a cross-sectional view taken along the line CC in Fig. 2. Fig. 4 is a perspective view of the cab 9 as viewed from the right rear. The cab 9 has a seat 10, a floor 11, a pair of left and right side panel portions 101, a pair of left and right side portions 102, a ceiling portion 12, a pair of left and right front pillars 13, a pair of left and right rear pillars 14, a pair of left and right intermediate pillars 15, and a rear portion 103.

As shown in FIG. 3, the seat 10 has a seat surface 21 and a backrest 22. The seat surface 21 is the surface on which the operator sits. The backrest 22 is located at the rear of the seat surface 21. In this embodiment, the seat 10 is configured to be rotatable left and right within a predetermined angle range α° (e.g., approximately 10°) from a position facing directly forward. In FIG. 3, the seat 10 in the maximum rotated state to the right is shown by a solid line, and the seat 10 facing directly forward is shown by a two-dot chain line.

The floor portion 11 includes a front portion 111 disposed on the portion on the forward direction A1 side, and a rear portion 112 disposed on the portion on the rearward direction A2 side. As shown in FIG. 2, the rear portion 112 is disposed higher than the front portion 111, and a step is provided between the front portion 111 and the rear portion 112. As shown in FIG. 3, the rear portion 112 is formed to be shorter in width in the vehicle width direction B than the front portion 111.

As shown in FIG. 3, a pair of left and right side panel portions 101 are arranged on both sides of the rear portion 112 in the vehicle width direction B. Each side panel portion 101 is arranged in the up-down direction. The right side panel portion 101 is arranged from the right end of the rear portion 112 toward the top. The left side panel portion 101 is arranged from the left end of the rear portion 112 toward the top.

As shown in FIG. 3, the pair of left and right side portions 102 are arranged on either side of the rear portion 112 in the vehicle width direction B, sandwiching the rear portion 112 therebetween. Each side portion 102 is arranged parallel to the floor portion 11. Each side portion 102 is arranged higher than the rear portion 112. Each side portion 102 is arranged from the upper end of the side panel portion 101 toward the outside in the vehicle width direction B. The right side portion 102 is arranged from the upper end of the right side panel portion 101 toward the right direction B2. The left side portion 102 is arranged from the upper end of the left side panel portion 101 toward the left direction B1. The side portions 102 are located on the sides of the backrest 22, as shown in FIG. 2.

A pair of left and right front pillars 13 are disposed between the front end of the front part 111 of the floor part 11 and the front end of the ceiling part 12. The left front pillar 13 connects the left B1 side end of the front end of the front part 111 to the left B1 side end of the front end of the ceiling part 12. The right front pillar 13 connects the right B2 side end of the front end of the floor part 11 to the right B2 side end of the front end of the ceiling part 12.

As shown in FIG. 2, a pair of left and right rear pillars 14 are disposed between the side portions 102 and the ceiling portion 12. The left rear pillar 14 connects the left B1 end of the left side portion 102 to the left B1 end of the rear end of the ceiling portion 12. The right rear pillar 14 connects the right B2 end of the right side portion 102 to the right B2 end of the rear end of the ceiling portion 12. The rear pillars 14 will be described in detail later.

As shown in FIG. 2, the pair of left and right intermediate pillars 15 are disposed between the front portion 111 of the floor portion 11 and the ceiling portion 12. The pair of intermediate pillars 15 are disposed between the pair of front pillars 13 and the pair of rear pillars 14 in the front-to-rear direction A. The left intermediate pillar 15 extends upward from the left end of the rear end of the front portion 111 and is connected to the ceiling portion 12. The right intermediate pillar 15 extends upward from the right end of the rear end of the front portion 111 and is connected to the ceiling portion 12.

The rear surface portion 103 is disposed on the rear surface of the cab 9. The rear surface portion 103 is disposed between the rear end of the floor portion 11 and the rear end of the ceiling portion 12. As shown in FIG. 4A, the rear surface portion 103 has an upper frame portion 81, a lower frame portion 82, an upper protrusion portion 83, and a lower protrusion portion 84. The upper frame portion 81 is plate-shaped and disposed downward from the rear end of the ceiling portion 12. The lower frame portion 82 is plate-shaped and disposed upward from the rear end of the rear portion 112 of the floor portion 11. The left and right side portions 102 and the lower protrusion portion 84 surround the left and right sides and the rear of the seat 10. The upper protrusion portion 83 protrudes from the lower end of the upper frame portion 81 toward the rear direction A2. The lower protrusion portion 84 protrudes from the upper end of the lower frame portion 82 toward the rear direction A2. The lower protrusion portion 84 and the side portion 102 are disposed at the same height and are connected. A predetermined gap is provided between the upper protrusion 83 and the lower protrusion 84. A rear window 19, which will be described later, can be attached between the upper protrusion 83 and the lower protrusion 84 to form a bay window.

As shown in FIG. 1, the cab 9 further has a front window 16, a pair of left and right front side windows 17, a pair of left and right side windows 18, and a rear window 19 (see FIG. 4A). The front window 16 is disposed between the pair of left and right front pillars 13. The pair of left and right front side windows 17 are disposed so as to sandwich the front window 16. Each of the front side windows 17 is disposed between the front pillar 13 and the middle pillar 15. The pair of left and right side windows 18 are disposed on the sides of the seat 10. Each of the side windows 18 is disposed between the middle pillar 15 and the rear pillar 14. Note that with regard to the front side windows 17 and side windows 18, only the left front side window 17 and side window 18 are illustrated in FIG. 1, and are omitted in other drawings.

As shown in FIG. 3, the rear window 19 protrudes from the rear pillar 14 in the rear direction A2. The rear window 19 is disposed across a pair of rear pillars 14.

Figure 5(a) is a cross-sectional perspective view of the vicinity of the right-side rear pillar 14 seen from the right rear. Figure 5(b) is a view showing the state of Figure 5(a) with the rear window 19 removed. As shown in the figure, the lower end of the rear window 19 is attached to the lower frame 84a, which is the rear end of the lower protrusion 84. The upper end of the rear window 19 is attached to the upper frame 83a, which is the rear end of the upper protrusion 83 shown in Figure 4B.

The rear window 19 has a rear center window 23 and a pair of rear side windows 24, as shown in Figures 3, 4A, and 5(a). The rear center window 23 is arranged along the vehicle width direction B, as shown in Figure 3. The right rear side window 24 is arranged between the rear center window 23 and the right rear pillar 14. The left rear side window 24 is arranged between the rear center window 23 and the left rear pillar 14. The rear side windows 24 are arranged at an angle with respect to the vehicle width direction B. The rear side windows 24 are arranged at an angle so as to be positioned inward in the vehicle width direction B as they move toward the rear direction A2. In detail, the right rear side window 24 is inclined so as to be positioned to the left as it moves toward the rear direction A2. The left rear side window 24 is inclined so as to be positioned to the right as it moves toward the rear direction A2. The space between the rear side windows 24 and the rear center window 23 is filled with a sealant. In addition, something equivalent to a pillar may be placed between the rear side windows 24 and the rear center window 23.

(Rear pillar 14)
The pair of rear pillars 14 are provided at the center in the vehicle width direction B and are line-symmetrical with respect to a central axis O (see FIG. 3) along the front-rear direction A. The following description will focus on the right rear pillar 14.

Figure 6(a) is a cross-sectional perspective view of the vicinity of the right-side rear pillar 14 seen from the right front. Figure 6(b) is a view showing the state in which the rear window 19 has been removed from Figure 6(a). Figure 7(a) is a perspective view showing only the rear pillar 14 of Figure 5(b). Figure 7(b) is an exploded view of the rear pillar 14. Figure 8(a) is a top view of the rear pillar 14. Figure 8(b) is a rear view of the rear pillar 14 seen from behind.

As shown in Figures 6(a) and 6(b), the rear side window 24 of the rear window 19 is connected to the rear pillar 14.

As shown in FIG. 7(a), each rear pillar 14 has a first reinforcing member 31 (one example of a reinforcing member) and a pillar body member 32. The rear pillar 14 is formed into a cylindrical shape by the first reinforcing member 31 and the pillar body member 32. As shown in FIG. 6(a), the first reinforcing member 31 is arranged along the vehicle width direction B. As shown in FIG. 7(b), the first reinforcing member 31 is plate-shaped. The first reinforcing member 31 has an end face 31a on the outer side in the vehicle width direction B. The end face 31a is arranged parallel to the front-rear direction A. The end face 31a is formed along the up-down direction.

The first reinforcing member 31 has an upper portion 36 and a lower portion 33. The upper portion 36 has a generally constant width in the vehicle width direction B. The lower portion 33 is disposed below the upper portion 36. The lower portion 33 is the lower portion of the first reinforcing member 31, and is a portion of the first reinforcing member 31 that is connected to the side portion 102. The lower portion 33 includes a curved portion 34 and a lower end portion 35. The curved portion 34 is a portion that is formed such that its length in the vehicle width direction B increases downward from the lower end of the upper portion 36. The curved portion 34 has an inner surface that is curved convexly outward and downward. The lower end portion 35 is a portion of the lower portion 33 below the curved portion 34. The lower end portion 35 is connected to the side portion 102. The lower end portion 35 has a constant length in the vehicle width direction B.

The pillar main body member 32 is formed by bending a plate-shaped member, as shown in FIG. 7(b). The pillar main body member 32 is disposed rearward of the first reinforcing member 31, as shown in FIG. 6(b). The pillar main body member 32 has an outer portion 41 and an inner portion 42. The outer portion 41 is the outer portion of the pillar main body member 32 in the vehicle width direction B. The outer portion 41 follows the outline of the lateral portion 102 and the lower protruding portion 84. The rear end of the outer portion 41 is connected to the rear end of the inner portion 42. The inner portion 42 is the inner portion of the pillar main body member 32 in the vehicle width direction B.

The outer portion 41 includes an outer front portion 51 (an example of an outer connection portion) and an outer inclined portion 52. The outer front portion 51 is disposed along the front-to-rear direction A. As shown in FIG. 8(a), the front end 51a of the outer front portion 51 is connected to the outwardly facing end surface 31a of the first reinforcing member 31. The outer front portion 51 is connected perpendicularly to the first reinforcing member 31.

The outer inclined portion 52 is disposed rearward of the outer front portion 51. The outer inclined portion 52 is disposed at an incline with respect to the fore-and-aft direction A. As shown in FIG. 6(b), the outer inclined portion 52 is disposed at an incline so as to be positioned inward in the vehicle width direction B as it approaches the rear direction A2. As shown in FIG. 5(a) and FIG. 6(a), the outer inclined portion 52 is disposed parallel to the rear side window 24. As shown in FIG. 5(a), the outer edge 24a of the rear side window 24 is attached to the outer surface of the outer inclined portion 52.

The inner portion 42 has an inner front portion 53 (an example of an inner connection portion) and an inclined portion 54. The inner front portion 53 is arranged along the front-rear direction A as shown in FIG. 6(b). The front end surface 53a of the inner front portion 53 is connected perpendicularly to the rear surface 31b of the first reinforcing member 31 as shown in FIG. 8(a). The inclined portion 54 is arranged on the rear side of the inner front portion 53. The inclined portion 54 is connected to the inner front portion 53 at its rear end position 54a. The inclined portion 54 is arranged at an incline with respect to the front-rear direction A. As shown in FIG. 6(a) and FIG. 6(b), the inclined portion 54 is arranged at an incline so as to be positioned outward in the vehicle width direction B as it moves rearward. In more detail, the right inclined portion 54 is arranged at an incline so as to be positioned on the right direction B2 side in the vehicle width direction B as it moves rearward A2. The left inclined portion 54 is arranged at an incline so as to be positioned on the left direction B1 side in the vehicle width direction B as it moves rearward A2. The rear side windows 24 are positioned so that they protrude inward in the vehicle width direction B from the rear end position 54a of the inclined portion 54. The rear side windows 24 are inclined so that they are positioned inward in the vehicle width direction B as they move rearward from the rear end position 54a of the inclined portion 54 in a plan view.

9 is an oblique cross-sectional view of the rear pillar 14 viewed from inside the cab 9. A second reinforcing member 61 and a third reinforcing member 71 are connected to the rear pillar 14. The second reinforcing member 61 is a plate-shaped member and is arranged along the fore-and-aft direction A. The second reinforcing member 61 has a rear end surface 61a. The rear end surface 61a is arranged parallel to the vehicle width direction B. The rear end surface 61a is provided along the up-down direction. The rear end surface 61a is connected to the front surface 31c of the first reinforcing member 31. The second reinforcing member 61 has a lower portion 63. The lower portion 63 is the lower portion of the second reinforcing member 61 and is a portion of the second reinforcing member 61 that is connected to the side portion 102. The lower portion 63 includes a curved portion 64 and a lower end portion 65. The curved portion 64 is a portion of the lower portion 63 that is formed so that its length in the fore-and-aft direction A increases toward the side portion 102. The front surface of the curved portion 64 is curved convexly toward the rear and downward. The lower end portion 65 is the portion of the lower portion 63 below the curved portion 64. The lower end portion 65 is connected to the side portion 102. The length of the lower end portion 65 in the front-rear direction A is constant.

9, the third reinforcing member 71 is a plate-shaped member and is arranged parallel to the rear side window 24. As shown in FIG. 5(b), the third reinforcing member 71 has an outer end surface 71a. The outer end surface 71a is arranged perpendicular to the rear side window 24. The outer end surface 71a is provided along the up-down direction. The outer end surface 71a is connected to the outer surface of the inclined portion 54. As shown in FIG. 9, the third reinforcing member 71 includes a curved portion 74 and a lower end portion 75. The curved portion 74 is formed so that the length in the front-rear direction A increases toward the lower protrusion 84. The inner surface of the curved portion 74 is curved convexly toward the outside and downward. The lower end portion 75 is arranged below the curved portion 64 and connected to the lower protrusion 84. The lower end portion 75 has a constant length in a direction parallel to the rear side window 24.

(Rear visibility)
The eye point (one example of a predetermined position) of the operator when checking the rear will be described. When checking the rear, the operator rotates the seat 10 and moves his/her head. For example, when checking the right rear, the operator rotates the seat 10 to the right as shown in FIG. 3 to check the rear. At that time, the operator moves his/her head, so the eye point of the operator is a position moved from the center of the seat 10 to the right rear. FIG. 10 is a partially enlarged view of FIG. 3, and is a diagram for explaining the eye point of the operator. FIG. 10 shows the operator center P1. The operator center P1 is set based on ISO5353. A straight line L1 is perpendicular to the central axis D1 in the front-rear direction of the seat surface 21 and passes through the center of the front surface 22a of the backrest 22. In addition, a straight line L2 passes through the right end of the seat surface 21 when the seat 10 is rotated to the right by an angle α and is parallel to the central axis D1. The intersection of the straight lines L1 and L2 is the eye point E when checking the right rear. 3 is the intersection of a line that passes through the left end of the seat surface 21 and is parallel to the central axis D1 when the seat 10 is rotated leftward by an angle α, and a line L1. The height of the eye point E can be defined as the height range when a worker who is about 175 cm tall is sitting.

The right eye point E faces the right rear side window 24. Specifically, as shown in FIG. 3, a straight line passing through the inner end 24b of the connection part of the rear side window 24 with the rear pillar 14 and perpendicular to the rear side window 24 is defined as L3. The end 24b is a position corresponding to the inner end of the outer inclined portion 52 of the rear pillar 14. A straight line passing through the inner end 24c of the rear side window 24 and perpendicular to the rear side window 24 is defined as L4. The rear side window 24 faces the eye point E means that the eye point E is located in the region W1 between the lines L3 and L4. The lines L3, L4, and the eye point E are at the same height. The right inclined portion 54 is also located along the line L3. The right inclined portion 54 is inclined so as not to enter the region W1. The length of the upper portion 36 of the first reinforcing member 31 in the vehicle width direction B is also set so as not to enter the region W1.

Similarly, the eye point E in the left direction faces the left rear side window 24. Specifically, as shown in FIG. 3, a straight line passing through the inner end 24b of the connection part of the rear side window 24 with the rear pillar 14 and perpendicular to the rear side window 24 is defined as L5. A straight line passing through the inner end 24c of the rear side window 24 and perpendicular to the rear side window 24 is defined as L6. The left rear side window 24 facing the eye point E means that the eye point E is located in the area W2 between the lines L5 and L6. The lines L5, L6, and the eye point E are at the same height. The left inclined portion 54 is also located along the line L5. The left inclined portion 54 is inclined so as not to enter the area W2. The length of the upper part 36 of the first reinforcing member 31 in the vehicle width direction B is also set so as not to enter the area W2.

(Features, etc.)
(1)
The cab 9 of this embodiment is a cab 9 of a bulldozer 1, and includes a seat 10, a rear pillar 14, and a rear window 19. The rear pillar 14 is disposed behind the seat 10. The rear window 19 protrudes rearward from the rear pillar 14. The rear pillar 14 is disposed on the inside in the vehicle width direction B, and has an inclined portion 54 that is inclined so as to be positioned outward as it approaches the rear in a plan view. The rear window 19 has a rear side window 24 that is inclined so as to be positioned inward as it approaches the rear in a plan view from a rear end position 54a of the inclined portion 54. The rear side window 24 faces the eye point E of the seat 10.

In this way, rear visibility can be improved by extending the rear window 19 rearward from the rear pillar 14, providing an inclined portion 54 on the rear pillar 14, and providing the rear window 19 with a rear side window 24 that faces the eye point E.

(2)
In the cab 9 of this embodiment, the eye point E is located rearward and to the side of the operator center P1 (an example of a central position) of the seat 10 in a plan view.

When the operator checks behind him, the position of his head moves to the side and rear of the operator center P1 of the seat 10, so eye point E can be set at that position.

(3)
In the cab 9 of this embodiment, the rear pillar 14 further has an outer portion 41, an inner portion 42, and a first reinforcing member 31. The outer portion 41 is disposed outside the inclined portion 54 in the vehicle width direction B. The inner portion 42 includes the inclined portion 54, is connected to the outer portion 41, and is disposed inside the outer portion 41. The first reinforcing member 31 is plate-shaped, an end of the outer portion 41 is connected to an end of the inner portion 42, and is disposed along the vehicle width direction B. The first reinforcing member 31 has a lower portion 33 (an example of a first lower portion) including a curved portion 34 (an example of a portion whose length increases) whose length in the vehicle width direction B increases toward the bottom.

By making the first reinforcing member 31 a part of the rear pillar 14, the first reinforcing member 31 can be positioned on the outside of the rear pillar rather than on the inside. This ensures strength and improves visibility.

(4)
In the cab 9 of the present embodiment, the inner portion 42 is disposed in front of the inclined portion 54 along the fore-and-aft direction A and further includes an inner front portion 53 perpendicularly connected to the first reinforcing member 31. The outer portion 41 is disposed in the fore-and-aft direction A and further includes an outer front portion 51 perpendicularly connected to the first reinforcing member 31.

In this way, by positioning the inner front portion 53 and the outer front portion 51 of the pillar body member 32 perpendicular to the first reinforcing member 31, it is easy to connect them by welding or the like.

(5)
In the cab 9 of this embodiment, the rear pillar 14 has an outer portion 41 disposed on the outer side of the inclined portion 54 in the vehicle width direction B. The outer portion 41 includes an outer inclined portion 52 that is inclined so as to be positioned inward toward the rear. The outer inclined portion 52 is disposed parallel to the rear side window 24. The rear side window 24 is connected to the outer inclined portion 52.

This makes it easier to fix the rear side windows 24, which are arranged diagonally with respect to the vehicle width direction B, to the rear pillars 14.

<Other embodiments>
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the invention. In particular, the multiple embodiments and modifications described in this specification can be arbitrarily combined as necessary.

(A)
In the above embodiment, an inner front portion 53 perpendicular to the first reinforcing member 31 is provided to facilitate connection, but the inner front portion 53 does not have to be provided, and for example, the inclined portion 54 may be extended and connected to the first reinforcing member 31.

(B)
In the above embodiment, the rear pillar 14 connects between the ceiling portion 12 and the side portion 102, but this is not limited thereto. For example, if the width of the rear portion 112 of the floor portion 11 in the vehicle width direction B is large, the rear pillar 14 may connect between the ceiling portion 12 and the rear portion 112 of the floor portion 11.

(C)
In the above embodiment, the lower portion 33 of the first reinforcing member 31 has a lower end portion 35 whose length in the fore-aft direction A is constant, but it is not necessary to have a lower end portion 35, and the curved portion 34 may be connected to the floor portion 11. The lower portion 33 includes a portion whose length in the vehicle width direction B increases toward the floor portion 11, and if other portions exist, it is sufficient that the other portions are formed with a constant length in the left-right direction.

(D)
In the above embodiment, it has been described that the pillar main body member 32 is formed by bending a plate-like member, but this is not limiting and the pillar main body member 32 may be formed by joining a plurality of members.

(E)
In the above embodiment, the seat 10 is configured to rotate left and right, but the seat 10 does not have to rotate left and right. In this case, the position of the eye point can be obtained in the same manner as above.

(F)
In the above embodiment, a bulldozer 1 is given as an example of a work vehicle, but this is not limited to this and may be a wheel loader, motor grader, shovel loader, wheel loader, or dump truck, etc., as long as it is a work vehicle equipped with a cab.

1: Bulldozer 9: Cab 10: Seat 14: Rear pillar 24: Side window 54: Inclined portion 54a: Rear end

Claims

A cab for a work vehicle,
Seats and
a rear pillar disposed behind the seat;
a rear window extending rearward from the rear pillar,
the rear pillar has an inclined portion that is disposed on the inside in a vehicle width direction and inclined so as to be positioned outwardly toward the rear in a plan view,
the rear window has a rear side window that is inclined so as to be positioned inward from a rear end position of the inclined portion toward the rear in a plan view,
The rear side windows face a predetermined position of the seat.
Cab.
The predetermined position is rearward and to the side of the center position of the seat in a plan view.
The cab of claim 1.
The rear pillar is
an outer portion disposed on an outer side of the inclined portion in the vehicle width direction;
an inner portion including the inclined portion, connected to the outer portion, and disposed inside the outer portion;
An end of the outer portion and an end of the inner portion are connected to each other, and a plate-shaped reinforcing member is disposed along the vehicle width direction.
The reinforcing member has a lower portion including a portion whose length in the vehicle width direction increases downward.
The cab of claim 1.
The inner portion further includes an inner connection portion disposed on a front side of the inclined portion along the front-rear direction and perpendicularly connected to the reinforcing member,
The outer portion includes an outer connection portion disposed along the front-rear direction and perpendicularly connected to the reinforcing member.
The cab according to claim 3.
The rear pillar is
an outer portion disposed on an outer side of the inclined portion in the vehicle width direction;
The outer portion is
An outer inclined portion inclined inwardly toward the rear,
The outer inclined portion is disposed parallel to the rear side window,
The rear side window is connected to the outer slope portion.
The cab of claim 1.
A vehicle equipped with a cab according to any one of claims 1 to 5.
Work vehicle.