Driver's cab and work machinery

Abstract

The present invention provides a driver's cab equipped with armrests that reduce the restriction of the operator's arm movement and allow for proper support of the arm. [Solution] The driver's cab 6 comprises a driver's seat 13, operating levers 17 and 18, and armrests 19 and 20. The driver's seat 13 has a seat portion 21 and a backrest portion 22 extending upward from the seat portion 21. The operating levers 17 and 18 are located in front of the driver's seat 13. The armrests 19 and 20 are located behind the operating levers 17 and 18 and on the backrest portion so as to be spaced apart from the operating levers 17 and 18 in the front-rear direction. The upper surfaces of the armrests 19 and 20 have a tip portion 41 and a flat portion 81. The tip portion 41 is raised in the front-rear direction. The flat portion 81 is located between the tip portion 41 and the backrest portion 22.

Description

Technical Field

[0007] ,

[0001] The present invention relates to a cab and a work machine.

Background Art

[0002] There is disclosed a cab for a work machine, which includes a driver's seat, an operation lever provided in a console box arranged on the side of the driver's seat, and an armrest arranged on the driver's seat (see, for example, Patent Document 1).

[0003] The operator sits on the driver's seat, places an arm on the armrest, and operates the operation lever. At this time, the armrest supports the operator's arm from below.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the armrest shown in Patent Document 1 above may hinder the movement of the operator's elbow or arm when operating the operation lever.

[0006] An object of the present disclosure is to provide a cab and a work machine including an armrest that can reduce the hindrance to the movement of the operator's arm and appropriately support the arm.

Means for Solving the Problems

[0007] An embodiment of the present disclosure comprises a driver's seat, an operating lever, and an armrest. The driver's seat has a seat portion and a backrest portion extending upward from the seat portion. The operating lever is located in front of the driver's seat. The armrest is located on the backrest portion behind the operating lever and spaced apart from the operating lever in the front-rear direction. The upper surface of the armrest has a curved portion and a flat portion. The curved portion is raised in the longitudinal direction of the armrest. The flat portion is located between the curved portion and the backrest portion. [Effects of the Invention]

[0008] According to aspects of this disclosure, it is possible to provide a driver's cab and work machine equipped with an armrest that reduces obstruction of the operator's arm movement and provides proper support for the arm. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view showing a hydraulic excavator according to an embodiment of the present disclosure. [Figure 2] Figure 1 is a perspective view showing the configuration of the area around the driver's seat inside the operator's cab of a hydraulic excavator. [Figure 3] This is a plan view of Figure 2. [Figure 4] This is a side view of Figure 2. [Figure 5] Figure 2 is a perspective view showing the operator operating the left and right control levers. [Figure 6] Figure 2 is a perspective view showing the left armrest. [Figure 7] (a) A top view of the left armrest in Figure 6. (b) A right side view of the left armrest in Figure 6. (c) A left side view of the left armrest in Figure 6. (d) A front view of the left armrest in Figure 6. [Figure 8] This is a front view showing the internal structure of the driver's cab with the armrests moved to the stowed position. [Figure 9](a) A side view showing the operator gripping the left control lever. (b) A side view showing the operator pushing the left control lever forward. (c) A side view showing the operator pulling the left control lever backward. [Figure 10] This is a schematic diagram showing the positional relationship between the left control lever and the left armrest as viewed from the front. [Figure 11] This is a perspective view showing an armrest of a modified embodiment of the present disclosure. [Figure 12] (a) A top view of the left armrest in Figure 11. (b) A right side view of the left armrest in Figure 11. (c) A left side view of the left armrest in Figure 11. (d) A front view of the left armrest in Figure 11. [Modes for carrying out the invention]

[0010] A hydraulic excavator, as an example of the work machinery covered by this disclosure, will be described below with reference to the drawings.

[0011] Figure 1 is a perspective view showing the configuration of the hydraulic excavator 1 of this embodiment.

[0012] The hydraulic excavator 1 comprises a vehicle body 2 and a work implement 3. As shown in Figure 1, the vehicle body 2 has a running body 4 and a slewing body 5. The running body 4 has a pair of running devices 4a. Each running device 4a has a track 4c, and the hydraulic excavator 1 moves when a driving motor 4e rotates due to the driving force from the engine, driving the track 4c.

[0013] The rotating body 5 is mounted on the traveling body 4. The rotating body 5 is provided to rotate relative to the traveling body 4 about an axis along the vertical direction by a rotating device (not shown).

[0014] A cab called the operator's cab 6 is provided at the front left position of the revolving body 5. The revolving body 5 houses an engine, a hydraulic pump, etc. not shown. In this embodiment, unless otherwise specified, front, rear, left, and right are described based on the driver's seat in the operator's cab 6. The direction in which the driver's seat faces directly forward is defined as the front direction F, and the direction opposite to the front direction is defined as the rear direction B. When the driver's seat faces directly forward, the right and left sides in the lateral direction are defined as the right direction R and the left direction L, respectively. The left-right direction corresponds to the width direction.

[0015] The working machine 3 has a boom 7, an arm 8, and an excavation bucket 9, and is attached to the front center position of the revolving body 5. Specifically, the working machine 3 is arranged on the right side of the operator's cab 6. The base end portion of the boom 7 is rotatably connected to the revolving body 5. Also, the tip end portion of the boom 7 is rotatably connected to the base end portion of the arm 8. The tip end portion of the arm 8 is rotatably connected to the excavation bucket 9. The excavation bucket 9 is attached to the arm 8 so that its opening can face the direction (rearward) of the vehicle body 2. A hydraulic excavator with the excavation bucket 9 attached in such a direction is called a backhoe. Also, hydraulic cylinders 10 to 12 (boom cylinder 10, arm cylinder 11, and bucket cylinder 12) are arranged corresponding to the boom 7, the arm 8, and the excavation bucket 9, respectively. By driving these hydraulic cylinders 10 to 12, the working machine 3 is driven. Thereby, operations such as excavation are performed.

[0016] FIG. 2 is a perspective view showing the configuration around the driver's seat in the operator's cab 6. FIG. 3 is a plan view of FIG. 2. FIG. 4 is a side view of FIG. 2. As shown in FIGS. 2 to 4, the operator's cab 6 has a driver's seat 13, a travel lever unit 14, a left console box 15, a right console box 16, a left operation lever 17, a right operation lever 18, a left armrest 19, and a right armrest 20.

[0017] The driver's seat 13 is arranged on the floor surface 6a of the driver's cab 6. The driver's seat 13 has a seat portion 21, a backrest portion 22, a headrest 23, and a suspension mechanism portion 24. The seat portion 21 is the seat part where the operator sits. The seat portion 21 is arranged parallel to the floor surface 6a. The backrest portion 22 is arranged at the rear end of the seat portion 21. The backrest portion 22 extends upward from the rear end of the seat portion 21. The backrest portion 22 is the seat part that serves as the operator's backrest. The headrest 23 is arranged at the upper end of the backrest portion 22. The headrest 23 is the seat part that supports the operator's head. The suspension mechanism portion 24 is arranged between the floor surface 6a and the seat portion 21 in the vertical direction. The suspension mechanism portion 24 elastically supports the seat portion 21.

[0018] The travel lever unit 14 is arranged in front of the driver's seat 13. By pushing the travel lever 140 of the travel lever unit 14 forward, the vehicle body 2 moves forward, and by pulling the travel lever 140 toward the operator, the vehicle body 2 moves backward. Note that depending on the direction of the swivel body 5, the forward and backward movements may be reversed.

[0019] The left console box 15 and the right console box 16 are arranged symmetrically left and right with the driver's seat 13 in between. The left console box 15 and the right console box 16 are formed to be long in the front-rear direction and short in the left-right direction in a plan view of FIG. 3. Also, as shown in FIG. 4, in a side view, the left console box 15 and the right console box 16 overlap a part of the driver's seat 13. The left console box 15 and the right console box 16 overlap the seat portion 21 in a side view.

[0020] The left operation lever 17 and the right operation lever 18 are arranged in front of the driver's seat 13 and on the sides. The left operation lever 17 and the right operation lever 18 are arranged symmetrically in the left-right direction.

[0021] The left control lever 17 is located on the left side of the driver's seat 13. The left control lever 17 is attached to the left console box 15. The left control lever 17 extends upward from the front end of the left console box 15. As shown in Figures 3 and 4, the left control lever 17 is positioned with a predetermined distance W between it and the left armrest 19 in the front-rear direction. Operation of the left control lever 17 in the left-right direction corresponds to the rotational movement of the slewing body 5, and the slewing body 5 performs rightward and leftward rotational movements in response to left-right operation. Operation of the left control lever 17 in the front-rear direction corresponds to the movement of the arm 8, and the arm 8 performs pushing and retracting movements in response to front-rear operation.

[0022] The right operating lever 18 is located to the right of the driver's seat 13, as shown in Figures 2 and 3. The right operating lever 18 is attached to the right console box 16. The right operating lever 18 extends upward from the front end of the right console box 16. As shown in Figure 3, the right operating lever 18 is positioned with a predetermined distance W between it and the right armrest 20 in the front-rear direction. Operation of the right operating lever 18 in the front-rear direction corresponds to the movement of the boom 7, and the boom 7 is lowered and raised in accordance with the front-rear operation. Operation of the right operating lever 18 in the left-right direction corresponds to the movement of the excavation bucket 9, and the excavation and soil removal operations of the excavation bucket 9 are performed in accordance with the left-right operation.

[0023] The left armrest 19 and the right armrest 20 are positioned on the backrest 22 of the driver's seat 13. The left armrest 19 and the right armrest 20 are formed symmetrically in the left-right direction. The left armrest 19 is positioned on the left side of the backrest 22. The right armrest 20 is positioned on the right side of the backrest 22. The left armrest 19 is positioned closer to the rear end than the front end of the left console box 15. The right armrest 20 is positioned closer to the rear end than the front end of the right console box 16. The left armrest 19 and the right armrest 20 are positioned above the seat 21. The left armrest 19 and the right armrest 20 are formed to be elongated in the front-rear direction. Each of the left armrest 19 and the right armrest 20 is composed of, for example, a metal plate material, an elastic cushion material covering the plate material, and a cover material covering the surface of the cushion material.

[0024] Figure 5 is a perspective view showing the operator operating the left control lever 17 and the right control lever 18. As shown in Figure 5, the left armrest 19 supports the operator's left arm from below when operating the left control lever 17. The right armrest 20 supports the operator's right arm from below when operating the right control lever 18. The left armrest 19 and the right armrest 20 are used by the operator to lean on during breaks.

[0025] As shown in Figure 4, the left armrest 19 and the right armrest 20 are rotatably attached to the backrest 22 at their respective rear end faces 36 (base end). The left armrest 19 and the right armrest 20 are rotatable relative to the backrest 22 between the usage position P1 and the storage position P2. The left armrest 19 in the storage position P2 is indicated by a dashed line. In the usage position P1, the left armrest 19 and the right armrest 20 are positioned along the seat 21. In the storage position P2, the left armrest 19 and the right armrest 20 are positioned along the backrest 22. Note that the terms "parallel" and "alongside" in this specification do not mean strictly parallel, but include a range that is considered parallel according to common sense.

[0026] As mentioned above, the left armrest 19 and the right armrest 20 are symmetrical, so the configuration will be explained in detail using the left armrest as an example. In the following, the front-to-back and up-and-down directions are defined based on the left armrest 19 in the usage position P1. In the usage position P1, the longitudinal direction of the armrest corresponds to the front-to-back direction (arrows F and B). The tip end of the armrest corresponds to the front end, and the base end or the end on the backrest 22 side of the armrest corresponds to the rear end.

[0027] Figure 6 is a perspective view of the left armrest 19. Figure 7(a) is a top view of the left armrest 19, Figure 7(b) is a right side view of the left armrest 19, Figure 7(c) is a left side view of the left armrest 19, and Figure 7(d) is a front view of the left armrest 19.

[0028] As shown in Figures 6 and 7(a) to 7(d), the left armrest 19 has an upper surface 31, an outer surface 32, an inner surface 33, a lower surface 34, a front end surface 35, and a rear end surface 36. The upper surface 31 faces upward. The upper surface 31 will be described in detail later.

[0029] The outer surface 32 faces outward in the left-right direction. The outer surface 32 faces away from the driver's seat 13. The outer surface 32 is positioned downward from the outer edge of the upper surface 31 in the left-right direction. The outer surface 32 faces to the left on the left armrest 19.

[0030] The inner surface 33 faces inward in the left-right direction. The inner surface 33 faces the driver's seat 13. The inner surface 33 is positioned downward from the inner edge of the upper surface 31 in the left-right direction. The inner surface 33 faces to the right on the left armrest 19.

[0031] The lower surface 34 faces downward. The lower surface 34 is positioned to connect the lower end of the outer surface 32 and the lower end of the inner surface 33. In this embodiment, as shown in Figures 7(b) and 7(c), for example, the lower surface 34 is inclined to become lower towards the rear.

[0032] The tip surface 35 faces forward. The tip surface 35 is positioned to connect the front end of the upper surface 31, the front end of the outer surface 32, the front end of the inner surface 33, and the front end of the lower surface 34.

[0033] The rear end surface 36 faces backward. The rear end surface 36 is positioned to connect the rear end of the upper surface 31, the rear end of the outer surface 32, the rear end of the inner surface 33, and the rear end of the lower surface 34. As shown in Figure 4, the rear end surface 36 is positioned to overlap with the side surface 22e of the backrest portion 22 in a side view. In this embodiment, as shown in Figures 7(b) and 7(c), the lower part of the rear end surface 36 curves and connects to the lower surface 34.

[0034] The upper surface 31 has a tip portion 41 (an example of a curved portion) and a base portion 42. The tip portion 41 is formed extending rearward from the tip surface 35. The tip portion 41 is raised in the front-rear direction. The tip portion 41 is formed in a curved shape in the front-rear direction. It is raised. The tip portion 41 is raised such that a portion of it is higher than other portions along a straight line parallel to the front-rear direction passing through any position in the width direction. In a side view, the tip portion 41 has a shape that protrudes upward, as shown in Figure 6. The tip portion 41 protrudes upward such that its height changes at least in the front-rear direction. The base portion 42 is located behind the tip portion 41. The base portion 42 extends from the side of the backrest portion 22 to the tip portion 41. The base portion 42 is located from the rear end surface 36 to the tip portion 41.

[0035] The tip portion 41 has a first portion 51 and a second portion 52. The first portion 51 is positioned towards the rear from the upper end of the tip surface 35. The front end 51a of the first portion 51 is the upper end of the tip surface 35. The first portion 51 is formed in a curved shape that becomes higher towards the rear.

[0036] The second part 52 is positioned behind the first part 51. The second part 52 is positioned rearward from the rear end 51b of the first part 51. The second part 52 is curved so that it becomes lower towards the rear. The first part 51 and the second part 52 are smoothly connected in the front-rear direction. In the front-rear direction, the rear end 51b of the first part 51 is the highest point. The rear end 52b of the second part 52 is the front end of the base part 42. The base part 42 is formed from the rear end 52b of the second part 52.

[0037] The first portion 51 has a first outer portion 61 and a first inner portion 62. The front end 51a of the first portion 51 is formed by the front end 61a of the first outer portion 61 and the front end 62a of the first inner portion 62. The rear end 51b of the first portion 51 is formed by the rear end 61b of the first outer portion 61 and the rear end 62b of the first inner portion 62.

[0038] The first outer portion 61 is located on the side opposite the driver's seat 13 in the left-right direction. The first outer portion 61 is positioned inward from the upper end of the outer surface 32. The first outer portion 61 has a constant height in the left-right direction. The first inner portion 62 is located on the driver's seat 13 side. The first inner portion 62 is positioned outward from the upper end of the inner surface 33. The first inner portion 62 is located between the inner end 61c of the first outer portion 61 and the upper end of the inner surface 33. The first inner portion 62 is curved so that its height decreases as it approaches the driver's seat 13 side (inward) from the inner end 61c.

[0039] The second part 52 has a second outer part 71 and a second inner part 72. The rear end 52b of the second part 52 is formed by the rear end 71b of the second outer part 71 and the rear end 72b of the second inner part 72. The second outer part 71 is located on the opposite side of the driver's seat 13. The second outer part 71 is positioned inward from the upper end of the outer surface 32. The second outer part 71 is formed to have a constant height in the left-right direction. The second inner part 72 is located on the driver's seat 13 side. The second inner part 72 is positioned outward from the upper end of the inner surface 33. The second inner part 72 is located between the inner end 71c of the second outer part 71 and the upper end of the inner surface 33. The second inner part 72 is curved so that its height decreases as it approaches the driver's seat 13 side (inward) from the inner end 71c.

[0040] The rear end 52b of the second part 52 is lower in height than the front end 51a of the first part 51 at a position opposite to it in the front-rear direction. More specifically, the height of any predetermined position of the rear end 52b of the second part 52 is lower than the position of the front end 51a that intersects a straight line along the front-rear direction passing through this predetermined position. The part where the first outer part 61 and the second outer part 71 are connected (rear end 61b) is the highest in height at the tip 41. Since the height of the first outer part 61 and the second outer part 71 is the same in the left-right direction, the entire rear end 71b of the second outer part 71 is formed to be lower than the entire front end 61a of the first outer part 61.

[0041] The base portion 42 has a flat portion 81 and a base-side inner portion 82. The flat portion 81 is located from the rear end of the tip portion 41 to the rear end surface 36. The flat portion 81 is located from the rear end 71b of the second outer portion 71 to the rear end surface 36. The flat portion 81 is located from the upper end of the outer surface 32 toward the inside. The flat portion 81 is formed parallel to the floor surface 6a.

[0042] The base-side inner portion 82 is positioned inside the flat portion 81 in the left-right direction. The base-side inner portion 82 is inclined to be positioned downward as it moves inward. The base-side inner portion 82 is positioned from the inner end 81c of the flat portion 81 to the upper end of the inner surface 33. In the plan view of Figure 7(a), the inner end 81c, the inner end 71c, and the inner end 61c are positioned on a straight line along the front-rear direction.

[0043] The right armrest 20 also has the same tip 41 and base 42 as the left armrest 19. The shape of the right armrest 20 is symmetrical to that of the left armrest 19, so its description is omitted.

[0044] As shown in Figures 6 and 7(a), the tip portion 41 is formed such that its width in the left-right direction increases as it moves toward the forward direction F. Thus, the tip portion 41 is wider than the base portion 42. Figure 8 is a front view showing the internal structure of the driver's cab 6 with the armrests 19 and 20 moved to the stowed position P2. As described above, as shown in Figure 8, in the stowed position P2, the armrests 19 and 20 are positioned along the side surface 22e of the backrest portion 22, and the tip portion 41 is formed such that its width increases in the stowed position P2 to the extent that it does not interfere with the backrest portion 22.

[0045] Next, the main effects and advantages of the driver's cab 6 and the work machinery of this embodiment will be described.

[0046] The upper surface 31 of the armrests 19 and 20 in the driver's cab 6 of the above embodiment includes a tip portion 41 that rises in the longitudinal direction of the armrests 19 and 20, and a flat portion 81 positioned between the tip portion 41 and the backrest portion 22. Figure 9(a) is a side view showing the state in which the operator is gripping the left operating lever 17. As shown in Figure 9(a), the rise of the tip portion 41 allows the operator to properly support the forearm AR from below when operating the left operating lever 17. In addition, the presence of the flat portion 81 in the armrests 19 and 20 makes it easier to lean back by placing the forearm AR on the flat portion 81 when taking a break.

[0047] The tip portion 41 of the armrests 19 and 20 in the driver's cab 6 of the above embodiment has a first portion 51 and a second portion 52. The height of the first portion 51 increases towards the backrest portion 22. The second portion 52 is located on the backrest portion 22 side of the first portion 51 and decreases in height towards the backrest portion 22.

[0048] Figure 9(b) is a side view showing the state in which the operator pushes the left operating lever 17 forward. When the left operating lever 17 is pushed forward, the operator's forearm AR moves forward and downward (see arrow C). Therefore, by providing the first portion 51, which is lower in position toward the front, at the tip portion 41, the forearm AR can move smoothly forward and downward.

[0049] Figure 9(c) is a side view showing the state in which the operator has pulled the left operating lever 17 backward. When the left operating lever 17 is pulled backward, the operator's forearm AR moves backward and downward (see arrow D). Therefore, by providing the tip portion 41 with a second portion 52 that is lower in position towards the rear, the forearm can be moved smoothly backward and downward.

[0050] In the above embodiment, the first portion 51 and the second portion 52 of the armrests 19 and 20 in the driver's cab 6 are curved in the front-rear direction. This allows the arm to slide smoothly along the upper surface 31 when operating the control lever.

[0051] In the above embodiment, the height of the rear end 52b (the end on the backrest side 22) of the second portion 52 is lower than the front end 51a (the end on the front end side) of the first portion 51 at an opposing position in the longitudinal direction of the armrests 19 and 20. This further reduces obstruction of the forearm AR by the armrests 19 and 20 when the operating lever is pulled backward.

[0052] In the above embodiment, the armrests 19 and 20 in the driver's cab 6 are formed so that the width at the tip is wider than the width at the base, so as not to interfere with the backrest 22 in the stowed position P2. This allows the forearm AR to be supported from below even when the operating lever is operated in the left-right direction.

[0053] In the above embodiment, the armrests 19 and 20 in the driver's cab 6 have a first portion 51 which includes a first inner portion 62 and a first outer portion 61. The first inner portion 62 is located on the driver's seat 13 side. The first outer portion is located on the opposite side from the driver's seat 13. The second portion 52 has a second inner portion 72 and a second outer portion 71. The second inner portion 72 is located on the driver's seat 13 side. The second outer portion 71 is located on the opposite side from the driver's seat 13. The height of the first inner portion 62 and the second inner portion 72 decreases in the width direction as they approach the driver's seat 13.

[0054] Figure 10 is a schematic diagram showing the positional relationship between the left operating lever 17 and the left armrest 19 as viewed from the front. As shown in Figure 10, when the left operating lever 17 is moved inward, the operator's forearm AR moves inward and downward (arrow E). Therefore, by forming the first inner part 62 and the second inner part 72, which are the direction of movement of the forearm AR, so that their height decreases as they approach the driver's seat 13, the obstruction of the forearm AR by the armrests 19 and 20 when the operating lever is moved inward can be further reduced.

[0055] The first inner portion 62 and the second inner portion 72 are curved in the width direction. This allows the forearm portion AR to move smoothly when the operating lever is moved inward.

[0056] In the above embodiment, the armrests 19 and 20 in the driver's cab 6 have a constant height in the width direction between the first outer portion 61 and the second outer portion 71. This allows for stable support of the operator's forearm AR from below.

[0057] 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.

[0058] In the above embodiment, as shown in Figure 2 and other figures, the armrests 19 and 20 and the operating levers 17 and 18 are shown as an integrated unit via the console boxes 15 and 16, but they may be separate components, and the operating levers may be independently provided on the floor.

[0059] In the armrests 19 and 20 of the above embodiments, the second portion 52 is curved in the front-rear direction, but is not limited to this and may be inclined. Figure 11 is a perspective view showing the left armrest 19' having an inclined second portion 52'. Figure 12(a) is a top view of the left armrest 19', Figure 12(b) is a right side view of the left armrest 19', Figure 12(c) is a left side view of the left armrest 19', and Figure 12(d) is a front view of the left armrest 19'. As shown in Figures 11 and 12(a) to 12(d), in the left armrest 19', the second portion 52' is inclined so that it becomes lower in the front-rear direction from the rear end 51b of the first portion 51 towards the rear. As shown in Figures 12(b) and 12(c), the second portion 52' is formed in a straight line in a side view. Furthermore, the second inner portion 72', which is the inner portion in the width direction of the second portion 52', and the second outer portion 71', which is the outer portion, are also inclined to become lower towards the rear, similar to the second portion 52'. In Figures 11 and 12(a) to 12(d), the rear end 71b' of the second outer portion 71', the rear end 72b' of the second inner portion 72', and the inner end 71c' of the second outer portion 71' are shown.

[0060] In the armrests 19 and 20 of the above embodiment, the rear end of the first part 51 and the front end of the second part 52 are directly connected, but a flat portion may be provided between the rear end of the first part 51 and the front end of the second part 52.

[0061] In the armrests 19 and 20 of the above embodiment, the flat portion 81 is positioned from the rear end 72b of the second outer portion 71 to the rear end surface 36, but it does not have to be positioned all the way to the rear end surface 36; it is sufficient that it is positioned at least between the front portion 41 and the backrest portion 22.

[0062] In the above embodiments of the armrests 19 and 20, the tip portion 41 of the upper surface 31 corresponds to an example of the curved portion of this disclosure, but the curved portion does not have to be provided at the tip of the armrests 19 and 20. For example, a flat portion may be provided in front of the curved portion.

[0063] In the armrests 19 and 20 of the above embodiment, the base end portion 42 is provided with an inner base portion 82, but the inner base portion 82 does not have to be provided. For example, the base end portion 42 may not have an inner base portion 82, and only the shape of the flat portion 81 may be provided.

[0064] In the armrests 19 and 20 of the above embodiments, the tip portion 41 is provided with a first inner portion 62 and a second inner portion 72, but the first inner portion 62 and the second inner portion 72 do not necessarily have to be provided. For example, the tip portion 41 may not have the first inner portion 62 and the second inner portion 72, and only the shape of the first outer portion 61 and the second outer portion 71 may be provided. [Industrial applicability]

[0065] The driver's cab equipped with the armrest of this disclosure has the effect of reducing obstruction to the operator's arm movement and providing proper support for the arm, and is useful for work machines and the like. [Explanation of Symbols]

[0066] 6: Driver's cab 13: Driver's seat 17: Left control lever 18: Right control lever 19: Left armrest 20: Right armrest 21: Seat part 22: Backrest 31: Above 41: Tip end 81: Flat area

Claims

1. A driver's seat having a seat portion and a backrest portion extending upward from the seat portion, The control lever located in front of the driver's seat, The backrest is positioned behind the operating lever and spaced apart from the operating lever in the front-to-back direction, The upper surface of the aforementioned armrest is The aforementioned armrest has a raised, curved portion in the longitudinal direction, It has a flat portion positioned between the curved portion and the backrest portion, Driver's cab.

2. The aforementioned curved section is, The first part is higher in height towards the backrest, The first part is positioned on the backrest side and has a second part whose height decreases as it approaches the backrest, The driver's cab according to claim 1.

3. Each of the first and second parts is curved in the longitudinal direction. The driver's cab according to claim 2.

4. The first portion is curved in the longitudinal direction, The second portion is inclined in the longitudinal direction, The driver's cab according to claim 2.

5. The height of the end of the second portion on the backrest side is lower than the end of the first portion on the front side at an opposing position in the longitudinal direction. The driver's cab according to claim 2.

6. The aforementioned armrest is It is rotatably positioned on the backrest so as to be able to switch between a usage state in which it is positioned along the seat and a stored state in which it is positioned along the backrest. The width at the tip is formed to be wider than the base end so as not to interfere with the backrest when the unit is stored. The driver's cab according to claim 1.

7. The first part is, The first inner portion located on the driver's side, It has a first outer part located on the opposite side from the driver's seat, The second part is, The second inner portion located on the driver's side, It has a second outer part located on the opposite side from the driver's seat, The first inner portion and the second inner portion are lower in height in the width direction as they approach the driver's seat. The driver's cab according to claim 2.

8. The first outer portion and the second outer portion have a constant height in the width direction. The driver's cab according to claim 7.

9. Each of the first inner portion and the second inner portion is curved in the width direction. The driver's cab according to claim 7.

10. A driver's cab according to any one of claims 1 to 9, A work machine driven by the operation of the aforementioned operating lever is provided, A type of machinery used for industrial work.

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