cabin

Abstract

To provide a cabin, the strength and visibility of which can be improved.SOLUTION: A cabin for being mounted on a machine body includes: right and left front pillars that are juxtaposed at an interval in a width direction of the cabin; a left rear pillar that is arranged in the rear of the left front pillar, and a right rear pillar that is arranged in the rear of the right front pillar; a front upper frame for connecting upper parts of the right and left front pillars together, and a rear upper frame for connecting upper parts of the right and left rear pillars together; and right and left side upper frames for connecting the upper parts of the front and rear pillars on the same right and left sides. The front upper frame is formed in a curved shape protruding upward in a front view. A central part in the width direction is higher than an upper end of the front pillar, and right and left ends are connected to the upper parts of the front pillars in positions lower by a predetermined distance than the upper ends of the front pillars.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a cabin that is mounted on a body of a work machine such as a tractor, a wheel loader, or a backhoe. [Background technology]

[0002] 2. Description of the Related Art A cabin disclosed in Patent Document 1 is conventionally known.

[0003] The cabin disclosed in Patent Document 1 has a first front pillar and a second front pillar arranged side by side with a gap in the width direction of the cabin. A first rear pillar is disposed rearward of the first front pillar, and a second rear pillar is disposed rearward of the second front pillar. The upper parts of the first front pillar and the second front pillar are connected to each other by a front upper frame, and the upper parts of the first rear pillar and the second rear pillar are connected to each other by a rear upper frame. The upper parts of the first front pillar and the first rear pillar are connected to each other by a first side upper frame, and the upper parts of the second front pillar and the second rear pillar are connected to each other by a second side upper frame. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-113664 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, conventionally, there are problems to be solved in terms of improving the strength and visibility of a cabin.

[0006] An object of the present invention is to improve the strength and visibility of a cabin. [Means for solving the problem]

[0007] A cabin according to one aspect of the present invention is a cabin mounted on an aircraft body, comprising left and right front pillars arranged side by side with a gap in the width direction of the cabin, a left rear pillar disposed rear of the left front pillar and a right rear pillar disposed rear of the right front pillar, a front upper frame connecting upper parts of the left and right front pillars to each other, a rear upper frame connecting upper parts of the left and right rear pillars to each other, and left and right side upper frames connecting upper parts of the front pillar and the rear pillar on the same left and right side, wherein the front upper frame is formed in a curved shape that protrudes upward in a front view, the height of the center part in the width direction is higher than the upper end of the front pillar, and the left and right ends are connected to the upper part of the front pillar at positions that are a predetermined distance below the upper end of the front pillar. The side upper frame is formed in a curved shape that protrudes upward in a side view and gradually transitions upward from both fore-and-aft ends toward the center in the fore-and-aft direction, with its upper end, which is the top surface of the center in the fore-and-aft direction, being at approximately the same height as the upper end of the front pillar, and its front end being connected to the front pillar at a position lower than the height of the end of the front upper frame.

[0009] The cabin has a roof, The rear pillar has an upper wall portion an upper wall portion including an opening communicating with the inside of the roof and an extension portion extending forward from a portion forming the opening to a portion beyond the opening; The rear portion of the side upper frame is curved downward toward the rear and is connected to the upper wall portion. The extension portion It penetrates downwards.

[0010] The vehicle further includes a door supported by the rear pillar for opening and closing an entrance to the cabin, the rear pillar having a door abutment portion with which the door abuts via a seal material, the door abutment portion being disposed on the upper wall portion of the vehicle. The extension portion The side upper frame has an upper portion formed by extending downward from the outer end in the width direction, and the rear portion of the side upper frame is extension part and inward in the width direction of the upper portion of the door abutment portion.

[0011] A cabin according to another aspect of the present invention is a cabin mounted on an aircraft body, comprising left and right front pillars arranged side by side with a gap in the width direction of the cabin, a left rear pillar disposed rear of the left front pillar and a right rear pillar disposed rear of the right front pillar, a front upper frame connecting upper parts of the left and right front pillars and a rear upper frame connecting upper parts of the left and right rear pillars, and left and right side upper frames connecting upper parts of the front pillar and the rear pillar on the same left and right side, wherein the front upper frame is formed in a curved shape that protrudes upward in a front view, the height of the central part in the width direction is higher than the upper end of the front pillar, and the left and right ends are connected to the upper part of the front pillar at positions that are a predetermined distance below the upper end of the front pillar, The rear pillar is hollow and has a first communication opening at its upper part that connects the interior of the rear pillar to the outside of the cabin, and the side upper frame is positioned so that the height position of the lower end of its rear end corresponds to the height position of the upper part of the first communication opening. Effect of the Invention

[0012] According to the above configuration, the front upper frame and the side upper frame are protruded upward. By forming it in a curved shape, it is possible to improve the strength of the cabin and the visibility. [Brief description of the drawings]

[0013] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a side view of the cabin frame. [Figure 4] FIG. [Diagram 5] FIG. 2 is a plan view of the cabin frame. [Figure 6] FIG. 4 is a rear view of the cabin frame. [Figure 7] FIG. [Figure 8] FIG. 2 is a perspective view of the rear pillar as viewed from outside the cabin. [Figure 9] FIG. 2 is a side view of the rear pillar as seen from inside the cabin. [Figure 10] 4 is a cross-sectional view taken along line Z1-Z1 of FIG. 3. [Figure 11] 4 is a cross-sectional view taken along line Z2-Z2 of FIG. 3. [Figure 12] 4 is a cross-sectional view taken along line Z3-Z3 in FIG. 3. [Figure 13] FIG. 4 is a vertical cross-sectional view of an outside air intake portion of a rear pillar. [Figure 14] FIG. 4 is a side view of the indoor opening and the lid body. [Figure 15] 4 is a schematic diagram showing an opening and closing mechanism of the lid body. FIG. [Figure 16] 4 is a side view showing the opening and closing mechanism of the outside air inlet. FIG. [Figure 17] FIG. [Figure 18] FIG. [Figure 19] FIG. 2 is a side cross-sectional view of the roof cut at the center in the width direction. [Figure 20] 4 is a rear cross-sectional view of the roof taken along the center side in the front-rear direction. FIG. [Figure 21] FIG. 4 is a side cross-sectional view of a second resonance tube. [Figure 22] FIG. 4 is a side view of the third resonance tube. [Figure 23] FIG. 2 is a side view of the upper part of the cabin frame. [Figure 24] FIG. 2 is a plan view of the upper part of the cabin frame. [Diagram 25] FIG. 4 is a rear cross-sectional view of the mid-front / rear portion of the cabin frame. [Figure 26] 4 is a perspective view of a corner portion between the front upper frame and the side upper frame. FIG. [Figure 27] 4 is a perspective view of a corner portion between the rear upper frame and the side upper frame. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0015] 1 is a schematic side view showing a tractor 2 having a cabin 1 according to this embodiment. In this embodiment, the tractor 2 is exemplified as a working machine (vehicle) on which the cabin 1 is mounted, but the working machine may be a wheel loader, a backhoe, or another working machine.

[0016] In this embodiment, the direction of the arrow A1 in FIG. 1 (the forward direction of the tractor 2) is the forward direction, the direction of the arrow A2 in FIG. 1 (the backward direction of the tractor 2) is the rear direction, and the direction of the arrow A3 in FIG. 1 is the front-rear direction. Therefore, the front side of FIG. 1 is the left side, and the back side of FIG. 1 is the right side. The horizontal direction perpendicular to the front-rear direction A3 is the width direction. The direction from the center of the width direction of the tractor 2 to the right or left side is the width direction outward. In other words, the width direction outward is the width direction away from the center of the tractor 2. The opposite direction to the width direction outward is the width direction inward. In other words, the width direction inward is the width direction toward the center of the tractor 2.

[0017] 1, the tractor 2 has a travelling machine body (vehicle body) 3. The machine body 3 has a prime mover E1 and a transmission case 4.

[0018] The prime mover E1 is a diesel engine. The prime mover E1 is located at the front of the tractor 2 and is covered by a bonnet 10. The prime mover E1 may be an electric motor, or may be a hybrid type having a diesel engine and an electric motor. The bonnet 10 is formed in a curved shape with the upper surface slightly protruding upward.

[0019] The transmission case 4 is formed, for example, by directly connecting a flywheel housing that accommodates a flywheel, a clutch housing that accommodates a clutch that intermittently transmits the power of the prime mover E1 transmitted via the flywheel, and a transmission case that accommodates a transmission that changes the speed of the power transmitted via the clutch.

[0020] As shown in Fig. 1, the tractor 2 has a traveling device 5 that supports the machine body 3 so that it can travel. The traveling device 5 is exemplified by a wheel-type traveling device 5 having a plurality of front wheels 11L, 11R provided at the front of the machine body 3 and a plurality of rear wheels 12L, 12R provided at the rear of the machine body 3.

[0021] As shown in Fig. 1, the cabin 1 is mounted on the rear of the machine body 3. A driver's seat 6 where an operator sits is provided at the rear of the interior of the cabin 1 (referred to as the cabin interior). A steering handle 7 for steering the front wheels 11L, 11R, for example, is provided in front of the driver's seat 6.

[0022] As shown in Fig. 1, the cabin 1 has a cabin frame 8 that constitutes a framework. A roof 9 is provided on the upper part of the cabin frame 8. As shown in Fig. 2, the cabin frame 8 of this embodiment is a four-poster cabin frame that is not provided with a center pillar (quarter pillar).

[0023] As shown in Figs. 2 and 4, the cabin frame 8 has a left front pillar (also referred to as a first front pillar) 13L and a right front pillar (also referred to as a second front pillar) 13R at the front. In other words, the cabin frame 8 has the first front pillar 13L and the second front pillar 13R arranged side by side with a gap in the width direction. The first front pillar 13L is provided at the front of the left side surface of the cabin 1. The second front pillar 13R is provided at the front of the right side surface of the cabin 1. The upper parts of the first front pillar 13L and the second front pillar 13R are connected to each other by a front upper frame 15.

[0024] The first front pillar 13L and the second front pillar 13R are collectively referred to as the front pillars 13.

[0025] As shown in FIG. 2 and FIG. 6, the cabin frame 8 has a left rear pillar (also referred to as a first rear pillar) 14L and a right rear pillar (also referred to as a second rear pillar) 14R at the rear. In other words, the cabin frame 8 has the first rear pillar 14L and the second rear pillar 14R arranged side by side with a gap in the width direction. The first rear pillar 14L is provided at the rear of the left side surface of the cabin 1. The second rear pillar 14R is provided at the rear of the right side surface of the cabin 1. The first rear pillar 14L is disposed behind the first front pillar 13L, and the second rear pillar 14R is disposed behind the second front pillar 13R. The upper parts of the first rear pillar 14L and the second rear pillar 14R are connected to each other by a rear upper frame 16. The lower parts of the first rear pillar 14L and the second rear pillar 14R are connected to each other by a rear lower frame 17.

[0026] The first rear pillar 14L and the second rear pillar 14R are collectively referred to as the rear pillar 14.

[0027] As shown in Figures 2 and 3, the cabin frame 8 has a left side upper frame (also referred to as the first side upper frame) 18L that connects the upper parts of the first front pillar 13L and the first rear pillar 14L, and a right side upper frame (also referred to as the second side upper frame 18) 18R that connects the upper parts of the second front pillar 13R and the second rear pillar 14R.

[0028] The first side upper frame 18L and the second side upper frame 18R are collectively referred to as the side upper frame 18.

[0029] As shown in Figs. 2 and 3, a left side lower frame (referred to as a first side lower frame) 19L is connected to the lower part of the first rear pillar 14L. The first side lower frame 19L extends from the lower part of the first rear pillar 14L so as to transition downward as it goes forward, and its lower end part is connected to the lower end part of the first front pillar 13L by a left connecting frame (referred to as a first connecting frame) 20L. As shown in Fig. 2, a right side lower frame (referred to as a second side lower frame) 19R is connected to the lower part of the second rear pillar 14R. The second side lower frame 19R extends from the lower part of the second rear pillar 14R so as to transition downward as it goes forward, and its lower end part is connected to the lower end part of the second front pillar 13R by a right connecting frame (referred to as a second connecting frame) 20R.

[0030] The first lower side frame 19L and the second lower side frame 19R are collectively referred to as the side lower frame 19, and the first connecting frame 20L and the second connecting frame 20R are collectively referred to as the connecting frames.

[0031] As shown in FIG. 2, a rear wheel fender 21 that covers the rear wheels 12L, 12R is fixed to the lower surface of the side lower frame 19 and the lower end of the rear pillar 14.

[0032] As shown in FIG. 2, a floor sheet 22 is provided between the left and right rear wheel fenders 21. As shown in FIG. 7, the front part of the floor sheet 22 is disposed below the driver's seat 6, and the driver's seat 6 is attached on the floor sheet 22. The rear part of the floor sheet 22 extends rearward and upward, and is located on the back side of the driver's seat 6. A step 23 that constitutes a floor extends forward from the front lower end of the floor sheet 22. The roof 9 is formed hollow. More specifically, the roof 9 has an inner roof 24 that constitutes a ceiling part and the like in the cabin, and an outer roof 25 that constitutes an upper wall and the like of the roof 9, and the space between the inner roof 24 and the outer roof 25 is formed hollow. An air conditioner (air conditioning device) 26 that adjusts the air in the cabin is disposed at the rear of the interior of the roof 9. The air conditioner 26 is mounted on the rear upper frame 16.

[0033] As shown in Fig. 1, a door 27 is provided on the left and right side surfaces of the cabin 1 to close an entrance 28 surrounded by the front pillar 13, the side upper frame 18, the rear pillar 14, the side lower frame 19, and the connecting frame 20. In detail, the door 27 is provided between the front pillar 13 and the rear pillar 14, and is supported by the rear pillar 14 via a first door hinge 29 and a second door hinge 30 so as to be openable and closable. The first door hinge 29 is attached to an upper part of the rear pillar 14, and the second door hinge 30 is attached to a lower part of the rear pillar 14. The door 27 is formed of a light-transmitting panel such as transparent glass.

[0034] A front panel 31 is provided on the front side of the cabin frame 8, spanning from the first front pillar 13L to the second front pillar 13R (see FIG. 7). A rear panel 32 is provided on the rear side of the cabin frame 8, spanning from the first rear pillar 14L to the second rear pillar 14R (see FIG. 7). The front panel 31 and the rear panel 32 are formed of a light-transmitting panel such as transparent glass. The front panel 31 is fixed to the first front pillar 13L, the second front pillar 13R, the front upper frame 15, etc., and the upper part of the rear panel 32 is attached to the rear upper frame 16 via a hinge so as to be rotatable around an axis extending in the width direction.

[0035] Next, the configuration of the rear pillar 14 will be described in detail.

[0036] The first rear pillar 14L and the second rear pillar 14R are formed symmetrically with respect to a vertical plane that passes through the center of the cabin 1 in the width direction and is perpendicular to the width direction, so the first rear pillar 14L and the second rear pillar 14R will be described together.

[0037] As shown in Figures 8 to 12, the rear pillar 14 has a first member 33, a second member 34, a third member 35, a fourth member 36, and a fifth member 37. As shown in Figures 10 to 12, the rear pillar 14 is formed hollow and surrounded by the first member 33 to the fifth member 37. The inside of the rear pillar 14 is called a pillar interior 38.

[0038] As shown in FIG. 8, the first member 33 has an outer wall portion 39 that constitutes the outer surface of the rear pillar 14. The outer wall portion 39 has a first portion 41, a second portion 42, a third portion 43, a fourth portion 44, and a fifth portion 45. The first portion 41 constitutes the front portion of the outer wall portion 39. The first portion 41 is a door abutment portion (hereinafter referred to as the door abutment portion) with which the door 27 abuts via a seal material. The door abutment portion 41 has an upper portion 41a, a lower portion 41b, and a middle portion 41c between the upper portion 41a and the lower portion 41b. The middle portion 41c is long in the vertical direction, with the upper portion protruding forward from the middle portion 41c, and the lower portion 41b also protruding forward from the middle portion 41c.

[0039] As shown in FIG. 8 and FIG. 10, the second portion 42 is disposed outward in the width direction from the rear edge of the door contact portion 41. Specifically, the second portion 42 is formed in an inclined shape that transitions rearward from the rear edge of the door contact portion 41 toward the outside in the width direction.

[0040] 10 to 13, the second portion 42 has a first insertion hole 46, a second insertion hole 47, and a third insertion hole 48 formed so as to penetrate the second portion 42. The first insertion hole 46 is formed in an upper portion of the second portion 42, the second insertion hole 47 is formed in a lower portion of the second portion 42, and the third insertion hole 48 is formed in a vertical midpoint of the second portion 42. The second portion 42 is a mounting wall portion to which the second member 34 is attached.

[0041] 8, the third portion 43 extends rearward from the rear edge of the second portion 42. The third portion 43 has an upper portion 43a, a lower portion 43b, and an intermediate portion 43c between the upper portion 43a and the lower portion 43b. The upper portion 43a and the lower portion 43b are recessed inward in the width direction from the intermediate portion 43c, and a first tubular portion 49 to which the first door hinge 29 is attached is fixed to the rear portion (recessed portion) of the upper portion 43a, and a second tubular portion 50 to which the second door hinge 30 is attached is fixed to the rear portion (recessed portion) of the lower portion 43b.

[0042] 8, the fourth region 44 extends inward in the width direction from an upper edge of the third region 43. The fifth region 45 extends upward from an edge portion on the inner side in the width direction of the fourth region 44.

[0043] As shown in FIG. 8, the first member 33 has a front wall portion 51 that constitutes the front side of the rear pillar 14. The front wall portion 51 has an upper portion 51a, a lower portion 51b, and a middle portion 51c between the upper portion 51a and the lower portion 51b. The upper portion 51a extends inward in the width direction from a lower edge of the upper portion 41a of the door abutting portion 41. The lower portion 51b extends inward in the width direction from an upper edge of the lower portion 41b of the door abutting portion 41. The middle portion 51c extends inward in the width direction from a front edge of the middle portion 41c of the door abutting portion 41.

[0044] 9 to 12, the first member 33 has a rear wall portion 52 that constitutes the rear side of the rear pillar 14. The rear wall portion 52 extends inward in the width direction from the third region 43 and the fifth region 45. A panel abutment portion 52a is formed on the outer width direction side of the rear wall portion 52, with which the rear panel 32 abuts via a sealant.

[0045] As shown in FIG. 8, FIG. 10 to FIG. 12, the second member 34 is fitted into the second portion 42 of the outer wall portion 39 and fixed to the second portion 42. More specifically, the second member 34 has an abutting wall (opening forming portion) 34a that abuts against the front surface of the second portion 42. An exterior opening 55 that communicates the pillar interior 38 with the outside of the cabin 1 (referred to as the outside of the cabin) is formed in the middle of the abutting wall 34a in the vertical direction. This exterior opening 55 allows outside air (air outside the cabin) to be taken into the pillar interior 38. In addition, since the abutting wall (opening forming portion) 34a of the second member 34 faces the front side, the outside air can be efficiently taken into the pillar interior 38 by running the tractor 2. Furthermore, since the abutting wall 34a is formed in an inclined shape that transitions rearward as it moves outward in the width direction, the visibility to the rear side as seen from the driver's seat 6 is good.

[0046] 8, the abutment wall 34a has a first communication opening 53 formed above the exterior opening 55 and a second communication opening 54 formed below the exterior opening 55. The first communication opening 53 and the second communication opening 54 communicate between the pillar interior 38 and the outside of the cabin. By providing the first communication opening 53 and the second communication opening 54, the amount of outside air that can be introduced into the pillar interior 38 can be increased.

[0047] As shown in Figure 13, the first communication opening 53 is formed at a position corresponding to the first insertion hole 46, the second communication opening 54 is formed at a position corresponding to the second insertion hole 47, and the outdoor opening 55 is formed at a position corresponding to the third insertion hole 48.

[0048] As shown in Fig. 8, the first communication opening 53 is formed in the upper part of the abutment wall 34a, in a part corresponding to the upper part 43a of the third part 43. Therefore, the first communication opening 53 is provided in a part corresponding to the first door hinge 29 (part covered by the first door hinge 29). As shown in Figs. 11 and 13, a cylindrical first guide wall 34b extending into the pillar interior 38 through the first insertion hole 46 is provided around the first communication opening 53.

[0049] As shown in FIG. 8, the second communication opening 54 is formed in the lower part of the contact wall 34a, and is formed in a part corresponding to the lower part 43b of the third part 43. Therefore, the second communication opening 54 is provided in a portion corresponding to the second door hinge 30 (a portion covered by the second door hinge 30). As shown in Fig. 12 and Fig. 13, a cylindrical second guide wall 34c extending through the second insertion hole 47 into the pillar interior 38 is provided around the second communication opening 54.

[0050] Since the first communication opening 53 corresponds to the first door hinge 29 and the second communication opening 54 corresponds to the second door hinge 30, this has the effect of making it difficult for water such as car wash water or rainwater to enter the interior of the pillar 38 through the first communication opening 53 and the second communication opening 54.

[0051] As shown in FIG. 8, the exterior opening 55 is formed between the first communication opening 53 and the second communication opening 54, and is therefore provided between the first door hinge 29 and the second door hinge 30.

[0052] As shown in Figures 10 and 13, a cylindrical third guide wall 34d is provided around the exterior opening 55 and extends through the third insertion hole 48 into the pillar interior 38. A plurality of louver walls 56 are provided in the third guide wall 34d at intervals in the vertical direction. Each louver wall 56 is formed in an inclined shape that transitions downward as it moves from the outside of the cabin toward the pillar interior 38, and is fixed to the third guide wall 34d. The louver walls 56 adjacent in the vertical direction overlap when viewed from the front. The louver walls 56 have the effect of making it difficult for water such as car wash water or rainwater to enter the pillar interior 38 through the exterior opening 55.

[0053] As shown in Fig. 9, the third member 35 is located inside the cabin, and is formed from the upper end to the lower end of the first member 33. As shown in Figs. 10 to 12, the third member 35 has an inner wall portion 57 facing inward in the width direction, and a front wall portion 58 extending outward in the width direction from a front edge of the inner wall portion 57.

[0054] As shown in Figs. 9 and 14, the interior wall portion 57 is formed with an interior opening 59 that connects the pillar interior 38 to the cabin interior. More specifically, the interior opening 59 is formed penetrating the interior wall portion 57 and is formed from the upper part to the lower part of the interior wall portion 57. The outside air taken into the pillar interior 38 through the exterior opening 55 can be taken into the cabin interior through the interior opening 59. That is, the rear pillar 14 has a ventilation function. This allows ventilation inside the cabin interior without providing an openable quarter glass. As a result, a four-pillar cabin frame 8 without a center pillar can be adopted, improving the visibility to the sides of the cabin 1.

[0055] As shown in Fig. 11, the widthwise outer end of the upper part of the front wall part 58 is connected to the upper part 41a of the door abutment part 41. As shown in Fig. 12, the widthwise outer end of the lower part of the front wall part 58 is connected to the lower part 41b of the door abutment part 41. As shown in Fig. 10, the middle part of the front wall part 58 is connected to the front wall part 51 of the first member 33.

[0056] As shown in Figures 10 to 12 and 14, a lid 60 that closes an interior opening 59 on the pillar interior 38 side is provided on the inner wall 57. The front end side of the lid 60 is pivoted to the inner wall 57 via a pivot 61 or the like and is capable of being opened and closed. The pivot 61 is disposed along the front edge of the interior opening 59 on the pillar interior 38 side. The pivot 61 is formed of a round bar material that is formed to have a length extending from the upper end to the lower end of the lid 60.

[0057] As shown in Fig. 14, an upper portion of the pivot 61 is supported by a first support portion 62, and a lower portion is supported by a second support portion 63. In detail, as shown in Fig. 11, the first support portion 62 is disposed on an upper portion of the front edge side of the indoor opening 59 and fixed to the inner wall portion 57, and has a tubular portion 62a through which the pivot 61 is inserted so as to be rotatable about its axis. As shown in Fig. 12, the second support portion 63 is disposed on a lower portion of the front edge side of the indoor opening 59 and fixed to the inner wall portion 57, and has a tubular portion 63a through which the pivot 61 is inserted so as to be rotatable about its axis.

[0058] As shown in Figure 15, the cover body 60 can swing between a closed position (shown by a solid line) X1 in which it blocks the interior opening 59 on the indoor side, and an open position (shown by a two-dot chain line) X2 in which it swings from the closed position X1 toward the pillar interior 38 to open the interior opening 59 on the indoor side.

[0059] 9, 14, and 15, a restricting wall 64 that restricts the swinging of the lid body 60 toward the cabin interior at the closed position X1 is provided on the cabin interior side of the inner wall portion 57. The restricting wall 64 is formed of a plate material and is attached to the inner wall portion 57 with bolts or the like. Also, as shown in FIG. 9, the restricting wall 64 is provided with an opening 64a that is slightly smaller than the indoor side opening 59 and is formed to a size corresponding to the indoor side opening 59. When the lid body 60 is swung to the open position X2 that opens the indoor side opening 59, the indoor side opening 59 communicates with the cabin interior via the opening 64a.

[0060] As shown in FIG. 15, a cover operating mechanism 65 for operating the cover 60 is provided. The cover operating mechanism 65 can operate the cover 60 from the closed position X1 to the open position X2 and can hold the cover 60 in the open position X2. To explain in detail, the cover operating mechanism 65 has an operating lever 65A and an operating wire 65B. The operating lever 65A is provided near the driver's seat 6 and is supported by a lever shaft 65C so as to be rotatable. One end of the operating wire 65B is connected to an arm portion 65D that rotates integrally with the operating lever 65A. A locking device 65E is connected to the other end of the operating wire 65B. The locking device 65E is engaged with a locking portion 65F fixed to the cover 60. When the operating lever 65A is rotated from a first position X3 shown by a solid line to a second position X4 shown by a virtual line, the operating wire 65B is pulled and the cover 60 swings from the closed position X1 to the open position X2. By holding the operating lever 65A in the second position X4, the cover 60 is held in the open position X2. It should be noted that the cover operating mechanism 65 is not limited to the disclosed mechanism.

[0061] 14 and 15, a biasing member 66 is provided at the middle of the pivot 61 for biasing the lid 60 in a direction from the open position X2 to the closed position X1 (the direction of the arrow Y1 in FIG. 15). The biasing member 66 has a coil portion fitted on the pivot 61 and is formed of a torsion coil spring having one end in contact with the lid 60 and the other end in contact with the inner wall portion 57. The lid 60 can be swung in the opening direction (the direction of the arrow Y2 in FIG. 15) against the biasing force of the biasing member 66 by the operation wire 65B bending or by the locking portion 65F moving relative to the locking tool 65E.

[0062] 15, when ventilation is not performed, the lid body 60 is disposed in the closed position X1 and the interior opening 59 is closed, but in this state, when the door 27 is closed from the open state and the internal pressure inside the cabin increases, the lid body 60 is pushed by the internal pressure F1 and swings to the opening side (arrow Y2 direction) against the biasing force of the biasing member 66. This allows air to be bled from inside the cabin, and the door 27 of the cabin 1, which has a high level of airtightness inside, can be closed smoothly.

[0063] As shown in FIG. 9, the fourth member 36 is formed from the upper end to the lower end of the first member 33 and the third member 35. As shown in FIGS. 10 to 12, the fourth member 36 has a partition wall 67 that divides the pillar interior 38 into front and rear. The partition wall 67 is provided between the outer wall portion 39 of the first member 33 and the rear portion of the inner wall portion 57 of the third member 35. As shown in FIGS. 10 to 12, the front side of the partition wall 67 in the pillar interior 38 is a ventilation flow passage 68 that circulates the outside air taken in from the outdoor opening 55 and the like to the indoor opening 59. The rear side of the partition wall 67 in the pillar interior 38 is an outside air introduction passage 69 that circulates the outside air taken in from the outdoor opening 55 to the outside air introduction port 37a described later.

[0064] As shown in Figs. 10 and 13, the partition wall 67 is formed with a circulation opening 67a for circulating air from the ventilation flow passage 68 to the outside air introduction passage 69. The circulation opening 67a is formed from the upper part to the lower part of the outdoor opening 55. The circulation opening 67a is formed from one end side to the other end side in the width direction of the partition wall 67. An outdoor air filter 70 for removing dust in the outdoor air circulating from the outdoor opening 55 to the outdoor air introduction passage 69 is inserted into the circulation opening 67a. The outdoor air filter 70 is attached to the partition wall 67 via an attachment member 71 having air permeability. Therefore, the outdoor air taken into the ventilation flow passage 68 from the outdoor opening 55 can flow through the outdoor air filter 70 to the outdoor air introduction passage 69.

[0065] 10 to 12, the fourth member 36 has a side wall portion 72 extending from the partition wall 67 and a connecting wall 73 extending from the side wall portion 72. In detail, the side wall portion 72 extends rearward from an inner end portion of the partition wall 67 in the width direction and closes the gap between the rear wall portion 52 of the first member 33 and the inner wall portion 57 of the third member 35. The connecting wall 73 extends outward in the width direction from the rear end of the side wall portion 72 and is connected to the rear wall portion 52 of the first member 33.

[0066] As shown in FIG. 8, the fifth member 37 is provided on the upper ends of the first member 33, the third member 35, and the fourth member 36, and constitutes an upper wall portion that is a wall portion at the upper end of the rear pillar 14. The member 37 is referred to as an upper wall portion. As shown in Fig. 5, the upper wall portion of the first rear pillar 14L is referred to as a first upper wall portion 37L, and the upper wall portion of the second rear pillar 14R is referred to as a second upper wall portion 37R.

[0067] The upper wall portion 37 is integrally formed with the plate material forming the first member 33. The upper wall portion 37 also has an outside air inlet that connects the pillar interior 38 (outside air inlet passage 69) to the inside of the roof 9. (opening) By driving the blower of the air conditioning device 26, outside air taken into the outside air introduction passage 69 is introduced into the interior of the roof 9 through the outside air introduction port 37a, and is taken into the air conditioning device 26.

[0068] As shown in FIG. 16, the inner roof 24 is formed with a communication hole 74 that communicates with the outside air inlet 37a. The outside air inlet 37a communicates with the inside of the roof 9 through the communication hole 74. An opening / closing mechanism 75 that opens and closes the outside air inlet 37a is provided inside the roof 9. The opening / closing mechanism 75 has a support bracket 76, a lifting motor 77, an operating member 78, a lifting arm 79, and an opening / closing lid 80. The support bracket 76 is attached to the inner roof 24. The lifting motor 77 is attached to the support bracket 76. The operating member 78 is attached to a drive shaft 77a of the lifting motor 77 so as to be rotatable together with the drive shaft 77a. An engagement pin 78a is provided on one end side of the operating member 78, and a pressing member 78b is provided on the other end side. The lifting arm 79 is pivotally supported at its longitudinal midpoint to the support bracket 76 by a support shaft 81. An elongated hole 79a is formed on one end of the lifting arm 79, and an engagement pin 78a is inserted into the elongated hole 79a. The other end of the lifting arm 79 is interlocked and connected to an opening / closing lid 80. In this opening / closing mechanism 75, when the drive shaft 77a of the lifting motor 77 is rotated from the state shown by the solid line in FIG. 16, the operating member 78 rotates, and one end of the lifting arm 79 is pulled up by the engagement pin 78a. When the one end of the lifting arm 79 is pulled up, the opening / closing lid 80 descends, and the outside air inlet 37a and the communication hole 74 are blocked, as shown by the solid line in FIG. 16. In this state, the pressing member 78b presses the lifting arm 79.

[0069] In this embodiment, the first rear pillar 14L and the second rear pillar 14R are formed in a similar structure, and the ventilation structure and the air conditioning outside air introduction structure are provided on both the first rear pillar 14L and the second rear pillar 14R, but the ventilation structure and the air conditioning outside air introduction structure may be provided on only one of the first rear pillar 14L or the second rear pillar 14R.

[0070] Incidentally, inside the cabin, there are transmitted "solid-borne sound" caused by vibrations of the prime mover E1 and the like propagating through mounts that support the cabin 1 in a vibration-isolating manner, and "air-borne sound" propagating through the door 27, the front panel 31, the rear panel 32, and the like. These propagated sounds cause so-called "booming sound" inside the cabin. As shown in FIG. 7, the cabin 1 of this embodiment has a resonator 86 (also called an air resonator or a noise canceller due to air resonance) that reduces the "booming sound" generated inside the cabin.

[0071] 7, the resonator 86 is provided on the inner roof 24. The resonator 86 is also provided above the driver's seat 6.

[0072] The inner roof 24 and the outer roof 25 constituting the roof 9 are made of resin. The resonator 86 is integrally formed with the inner roof 24 by forming the inner roof 24 by blow molding or the like. That is, the resonator 86 is integrally formed with the inner roof 24 by the resin that forms the inner roof 24. Note that the resonator 86 may be integrally formed with the inner roof 24 by the resin that forms the inner roof 24 by forming the inner roof 24 by rotational molding or the like.

[0073] By forming the resonator 86 integrally with the inner roof 24, no additional parts are required for mounting the inner roof 24, and the resonator 86 can be installed on the inner roof 24 in a space-saving manner without incurring additional costs.

[0074] As shown in Figures 17 and 18, the resonator 86 is provided at the center side in the width direction of the inner roof 24. The resonator 86 has at least one resonance tube 86A-86C. In this embodiment, the resonator 86 includes a plurality of resonance tubes 86A-86C of different lengths arranged side by side in the width direction of the cabin 1. Each of the resonance tubes 86A-86C is formed in a cylindrical shape that is long in the front-rear direction A3 (having an axis in the front-rear direction A3) and has a closed front end. In addition, at the rear end, there is an opening 87 that opens into the cabin (downward).

[0075] The multiple resonance tubes include three resonance tubes: a first resonance tube 86A, a second resonance tube 86B, and a third resonance tube 86C. The first resonance tube 86A is located at the center of the width direction of the inner roof 24. The second resonance tube 86B is disposed on the left side of the first resonance tube 86A with a gap therebetween. The third resonance tube 86C is disposed on the right side of the first resonance tube 86A with a gap therebetween. The number of resonance tubes is not limited. That is, there may be one, two, or four or more.

[0076] 17 and 18, the first resonance tube 86A, the second resonance tube 86B, and the third resonance tube 86C extend rearward from approximately the same position in the front-rear direction A3. That is, the opening holes 87 of each resonance tube 86A to 86C are arranged side by side in the width direction at the same position in the front-rear direction A. In terms of length, the first resonance tube 86A is the longest, and the second resonance tube 86B is slightly longer than the third resonance tube 86C.

[0077] As shown in Fig. 19, the first resonance tube 86A is formed into a cylindrical shape with a larger diameter at the front than at the rear. As shown in Fig. 21, the second resonance tube 86B is also formed into a cylindrical shape with a larger diameter at the front than at the rear. As shown in Fig. 22, the third resonance tube 86C is formed into a cylindrical shape with the same diameter from the front to the rear.

[0078] In the resonator 86 (first resonance tube 86A to third resonance tube 86C), the sound entering through the opening hole 87 is reflected by the inner wall surface, and the sound of the natural vibration of the resonator 86 coming out of the opening hole 87 is in antiphase with the sound inside the cabin, so they cancel each other out, canceling out the high peak frequency and reducing the "booming sound." In addition, since the resonance point of the invading sound wave changes depending on the volume of the resonator 86 (resonance tube), by providing multiple resonance tubes, it is possible to reduce the "booming sound" of different frequencies. Since the opening hole 87 of the resonator 86 is located near the operator's ear, it is possible to reduce the "booming sound" near the operator's ear.

[0079] 19 and 20, the inner roof 24 has a downwardly opening recess 88 formed by recessing the wall portion forming the inner roof 24 upward. The recess 88 has an upper wall 88b located above the edge of an opening 88a, and a rising wall portion 88c rising upward from the periphery of the edge of the opening 88a and connected to the upper wall 88b. The resonator 86 (first resonance tube 86A to third resonance tube 86C) is integrally formed with the upper wall 88b of the recess 88.

[0080] By forming the resonator 86 integrally with the upper wall 88b of the recess 88, it is possible to prevent the resonator 86 from narrowing the head clearance of the operator.

[0081] 19 to 22, the upper part (upper half) of the resonator 86 protrudes upward from the upper wall 88b, and the lower part (lower half) protrudes downward from the upper wall 88b. That is, the resonator 86 protrudes upward and downward from the upper wall 88b of the recess 88. This prevents the resonator 86 from protruding downward from the opening 88a of the recess 88. By configuring the resonator 86 so that it does not protrude downward from the recess 88, it is possible to ensure head clearance for the operator.

[0082] As shown in Figs. 17 and 18, the inner roof 24 is integrally formed with a duct 89 for circulating the conditioned air blown out from the air conditioning unit 26. The duct 89 has a first duct portion 90, a second duct portion 91, and a third duct portion 92. The first duct portion 90 is located behind the recess 88 and is connected to the air outlet 26a of the air conditioning unit 26. The second duct portion 91 has a rear portion extending diagonally forward and left from the left portion of the front portion of the first duct portion 90, and a middle portion extending forward on the left side of the recess 88. The front portion of the second duct portion 91 extends inward in the width direction in front of the recess 88. The third duct portion 92 has a rear portion extending diagonally forward and right from the right portion of the front portion of the first duct portion 90, and a middle portion extending forward on the right side of the recess 88. Furthermore, the front portion of the third duct portion 92 extends inward in the width direction in front of the recessed portion 88 .

[0083] By arranging multiple resonance tubes formed in the fore-and-aft direction A3 in the width direction, a resonator 86 including multiple resonance tubes that reduce noise at the operator's ears can be placed between the second duct portion 91 and the third duct portion 92.

[0084] On the cabin interior side of the inner roof 24, a first blowing section 93A to a fourth blowing section 93D are provided for blowing out the conditioned air flowing inside the duct 89 into the cabin interior. The blowing section 93A and the second blowing section 93B are disposed on the left side of the recessed section 88 and below the second duct section 91, and are connected to the second duct section 91. The third blowing section 93C and the fourth blowing section 93D are disposed on the right side of the recessed section 88 and below the third duct section 92, and are connected to the third duct section 92.

[0085] The recess 88 has a rear portion tapered so that its width decreases toward the rear in accordance with the shapes of the rear portions of the second duct portion 91 and the third duct portion 92.

[0086] 17 and 18, an inside air inlet 94 that communicates between the cabin interior and the inside of the roof 9 is formed on the left side of the rear part of the inner roof 24. An inside air filter 95 is fitted into the inside air inlet 94. The inside air inlet 94 is closed from the inside of the roof 9 by an opening / closing lid (not shown) in a manner that allows it to be opened and closed.

[0087] As shown in FIG. 17, a first groove 96A to a sixth groove 96F are formed on the lower surface side of the inner roof 24, each of which is open downward. The first groove 96A is formed in the front part of the inner roof 24 and extends in the width direction, and is fitted into the front upper frame 15 (see FIG. 19). The second groove 96B is formed in the rear part of the inner roof 24 and extends in the width direction, and is fitted into the rear upper frame 16 (see FIG. 19). The third groove 96C is formed by extending forward from the left end of the second groove 96B, and is fitted into the first side upper frame 18L and the first rear pillar 14L (see FIG. 20). The fourth groove 96D is formed by extending forward from the right end of the second groove 96B, and is fitted into the second side upper frame 18R and the second rear pillar 14R (see FIG. 20). The fifth groove 96E connects the left end of the first groove 96A to the front end of the third groove 96C. The sixth groove 96F connects the right end of the first groove 96A to the front end of the fourth groove 96D.

[0088] Sealing members are interposed between the first groove portion 96A to the sixth groove portion 96F and the front upper frame 15, the first side upper frame 18L and the second side upper frame 18R, the first rear pillar 14L and the second rear pillar 14R, and the rear upper frame 16. Therefore, the upper surfaces of the front upper frame 15, the first side upper frame 18L and the second side upper frame 18R, the first rear pillar 14L and the second rear pillar 14R, and the rear upper frame 16 are made into sealing surfaces with which the sealing members come into contact or are adhered.

[0089] As shown in Fig. 4, the front upper frame 15 is formed in a curved shape that protrudes upward when viewed from the front. More specifically, the front upper frame 15 is formed of a groove-shaped member that opens to the rear, and is formed in a curved shape that transitions upward from the left and right ends toward the widthwise center (longitudinal center). The front upper frame 15 is also formed in a uniform curved shape (arc shape) from one end to the other. The front upper frame 15 is also inclined so that the front surface transitions rearward as it approaches upward.

[0090] As shown in FIG. 4, a portion of the lower edge 9a on the front end side of the roof 9 that corresponds to the front upper frame 15 is formed in a curved shape that follows the curved shape of the front upper frame 15.

[0091] 3, 4, and 5, the first front pillar 13L and the second front pillar 13R are formed in a curved shape that protrudes outward in a front view and a side view. In more detail, the first front pillar 13L is formed in a curved shape that protrudes diagonally forward to the left, and the second front pillar 13R is formed in a curved shape that protrudes diagonally forward to the right.

[0092] The front panel 31 is formed in a curved shape that fits the first front pillar 13L and the second front pillar 13R. More specifically, the front panel 31 is formed in a spherical shape that is convex toward the front, and its upper edge side is bonded to the front upper frame 15 via a sealant, its left side edge side is bonded to the first front pillar 13L via a sealant, and its right side edge side is bonded to the second front pillar 13R via a sealant.

[0093] As shown in FIG. 3 and FIG. 23, the side upper frame 18 (the first side upper frame 18L and the second side upper frame 18R) is formed in a curved shape that protrudes upward in a side view. More specifically, the side upper frame 18 is formed by a groove-shaped member (see FIG. 27) that opens inward in the width direction, and is formed in a curved shape that transitions upward from the front and rear ends toward the center in the front-rear direction (center in the longitudinal direction). The side upper frame 18 is also formed in a uniform curved shape (arc shape) from one end to the other end. The side upper frame 18 (the first side upper frame 18L and the second side upper frame 18R) is inclined in an inclined shape that transitions inward in the width direction as it progresses upward. More specifically, the side upper frame 18 is inclined so that the side surface transitions inward in the width direction as it progresses upward.

[0094] 3, a portion of the lower edge 9b on the widthwise end side of the roof 9 that corresponds to the side upper frame 18 is formed in a curved shape that follows the curved shape of the side upper frame 18. This allows the shape of the side of the roof 9 to match the shape of the bonnet.

[0095] As shown in FIG. 25, the door 27 is formed in a curved shape (spherical shape) that is convex outward in the width direction, and abuts against a frame member that forms the entrance / exit opening 28 via a seal material.

[0096] By forming both the front upper frame 15 and the side upper frame 18 in a curved (rounded) shape that protrudes upward, the strength of the cabin 1 (cabin frame 8) can be improved. In addition, since the side upper frame 18 is curved and protrudes upward, and is inclined in a manner that transitions inward in the width direction as it goes upward, the side upper frame 18 follows the curved shape of the door 27 without being bulged outward in the width direction. As a result, the side upper frame 18 may be formed substantially straight from the front pillar 13 to the rear pillar 16 in a plan view, and when manufacturing a cabin 1 with different front and rear lengths, it is not necessary to form side upper frames 18 of different lengths, and it can be handled by simply cutting the side upper frame 18. In addition, since both the front upper frame 15 and the side upper frame 18 are rounded, the visibility can be improved when looking diagonally upward in the front, diagonally upward to the left, and diagonally upward to the right from inside the cabin.

[0097] 5, a first seal receiver 97L is provided at a corner between the front upper frame 15 and the first side upper frame 18L, and a second seal receiver 97R is provided at a corner between the front upper frame 15 and the second side upper frame 18R. A seal member disposed on an upper surface of the first side upper frame 18L from one side (left side) of the upper surface of the front upper frame 15 abuts against the first seal receiver 97L. A seal member disposed on an upper surface of the second side upper frame 18R from the other side (right side) of the upper surface of the front upper frame 15 abuts against the second seal receiver 97R.

[0098] The first seal receiver 97L and the second seal receiver 97R are collectively referred to as the seal receiver 97.

[0099] 26, the seal receiver 97 has a base 97a and an extension 97b extending from the base 97a. The base 97a is disposed on the inner side of the front pillar 13 in the width direction and fixed to an upper wall 15a of the front upper frame 15. The base 97a protrudes rearward from the front upper frame 15. The extension 97b extends from a rear portion of the base 97a outward in the width direction and toward above the side upper frame 18.

[0100] Since the side of the front upper frame 15 is curved downward as it moves outward in the width direction, and the front of the side upper frame 18 is curved downward as it moves forward, and there is also the front pillar 13, it is difficult to continuously arrange the sealing material from the front upper frame 15 via the front pillar 13 to the side upper frame 18. However, by providing the seal receiver 97, the sealing material can be smoothly passed from the rounded front upper frame 15 to the rounded side upper frame 18, making it easy to continuously arrange the sealing material.

[0101] As shown in Figures 23 and 27, the rear portion of the side upper frame 18 is inserted below the upper wall portion 37 of the rear pillar 14. More specifically, the rear portion of the first side upper frame 18L is inserted below the first upper wall portion 37L of the first rear pillar 14L, and the rear portion of the second side upper frame 18R is inserted below the second upper wall portion 37R of the second rear pillar 14R. That is, the first rear pillar 14L has a first upper wall portion 37L into which the rear portion of the first side upper frame 18L is inserted downward, and the second rear pillar 14R has a second upper wall portion 37R into which the rear portion of the second side upper frame 18R is inserted downward. This allows the seal member to be continuously disposed from the upper surface of the side upper frame 18 to the upper surface of the rear pillar 14.

[0102] Conventionally, when mounting the air conditioning unit 26 on the rear upper frame 16, it is necessary to make the step between the rear pillar 14 and the rear upper frame 16 (the difference in height between the top surface of the rear pillar 14 and the top surface of the rear upper frame 16) deep (large) in order to reduce the height of the air conditioning unit 26. This requires that sealing materials be stacked to fill the step, which creates the problem of poor sealing performance at the step. Also, the location where the air conditioning unit 26 is mounted is clearly visible, which makes it obvious that the air conditioning unit 26 is mounted.

[0103] In this embodiment, as shown in FIG. 23, the side upper frame 18 is formed in a curved shape that protrudes upward, so that the rear portion 18a of the side upper frame 18 is formed in a curved shape that transitions downward toward the rear. That is, the side upper frame 18 is formed so that the rear portion 18a is lowered. As a result, the height of the rear end side 18b of the side upper frame 18 can be made closer to the height of the rear upper frame 16. By making the height of the rear end side 18b of the side upper frame 18 closer to the height of the rear upper frame 16, the height of the upper wall portion 37 of the rear pillar 14 can be made lower. As a result, the step S1 in the height direction (vertical direction) between the upper wall portion 37 and the rear upper frame 16 can be reduced. By reducing this step S1, the sealing performance of the step portion S2 (see FIG. 27) can be improved, and the roof 9 (outer roof 25) can be shaped to eliminate the feeling that the air conditioner unit 26 is installed.

[0104] 23, in this embodiment, the rear end sides 18b of the side upper frames 18 (first side upper frame 18L and second side upper frame 18R) are provided at the same height as the rear upper frame 16. Note that the rear ends of the side upper frames 18 and the top surface of the rear upper frame 16 may be aligned at the same height, or may be slightly misaligned in the vertical direction.

[0105] Furthermore, by providing the rear end side 18b of the side upper frame 18 at the height position of the rear upper frame 16, the height of the upper wall portion 37 of the rear pillar 14 can be adjusted to the height of the rear end side 18b of the side upper frame 18 and the rear upper frame 16, as shown by two-dot chain lines in Fig. 23. By adjusting the height of the upper wall portion 37 of the rear pillar 14 to the height of the rear end side 18b of the side upper frame 18 and the rear upper frame 16, the seal member can be continuously disposed from the side upper frame 18 through the upper wall portion 37 of the rear pillar 14 to the rear upper frame 16. In turn, the seal member arranged from the front upper frame 15 through the first seal receiver 97L, the first side upper frame 18L, the first upper wall portion 37L of the first rear pillar 14L, the rear upper frame 16, the second upper wall portion 37R of the second rear pillar 14R, the second side upper frame 18R, and the second seal receiver 97R to the front upper frame 15 can be formed continuously (annularly).

[0106] The cabin 1 of this embodiment has the following advantages.

[0107] The cabin 1 is mounted on an aircraft body 3 and includes a hollow rear pillar 14 provided at the rear of the side of the cabin 1. The rear pillar 14 has an interior opening 59 that connects the interior 38 of the rear pillar 14 to the interior of the cabin, and an exterior opening 55 that connects the interior 38 of the pillar to the outside of the cabin.

[0108] With this configuration, outside air can be taken into the cabin from the exterior opening 55 through the pillar interior 38 and the interior opening 59. Providing a ventilation function in the rear pillar 14 eliminates the need to use the quarter glass as a ventilation member. And since there is no need to provide a center pillar for the quarter glass, the visibility to the sides of the cabin 1 can be improved. Also, costs can be reduced by reducing the number of parts.

[0109] The rear pillar 14 also has a cover body 60 that can swing between a closed position X1 that blocks the interior opening 59 and an open position X2 that swings from the closed position X1 toward the pillar interior 38 to open the interior opening 59, and a biasing member 66 that biases the cover body 60 in the direction from the open position X2 to the closed position X1.

[0110] According to this configuration, when the door 27 of the cabin 1 is closed, the internal pressure inside the cabin becomes high. When this occurs, the internal pressure causes the lid 60 to open against the biasing force of the biasing member 66. That is, by opening the lid 60 when the door 27 is closed, air can be bled from within the cabin, and the door 27 can be closed smoothly.

[0111] Further, the rear pillar 14 has an opening forming portion (abutment wall 34a) that faces forward and in which an exterior opening 55 is formed.

[0112] According to this configuration, as the aircraft body 3 on which the cabin 1 is mounted moves forward, outside air can be effectively taken into the cabin through the exterior opening 55.

[0113] Further, the opening forming portion (the abutting wall 34a) is inclined so as to transition rearward as it moves outward in the width direction of the cabin 1.

[0114] This configuration provides good visibility when looking rearward from inside the cabin.

[0115] The vehicle also has a front pillar 13 provided at the front of the side, a door 27 provided between the front pillar 13 and the rear pillar 14, a first door hinge 29 attached to the upper part of the rear pillar 14 and supporting the door 27, and a second door hinge 30 attached to the lower part of the rear pillar 14 and supporting the door 27, and an exterior opening 55 is provided between the first door hinge 29 and the second door hinge 30.

[0116] According to this configuration, the space between the first door hinge 29 and the second door hinge 30 can be utilized to form an exterior opening 55 in the rear pillar 14 .

[0117] In addition, the rear pillar 14 has a first communication opening 53 and a second communication opening 54 which are openings different from the exterior opening 55 and which connect the pillar interior 38 with the outside of the cabin, the first communication opening 53 being provided in a portion corresponding to the first door hinge 29, and the second communication opening 54 being provided in a portion corresponding to the second door hinge 30.

[0118] With this configuration, the amount of outside air introduced into the pillar interior 38 through the first communication opening 53 and the second communication opening 54 can be increased, and the first door hinge 29 and the second door hinge 30 can prevent rainwater or water from a car wash from entering through the first communication opening 53 and the second communication opening 54.

[0119] Also, a lid operating mechanism 65 is provided for operating the lid 60 from the closed position X1 to the open position X2 and for maintaining it at the open position X2.

[0120] According to this configuration, the opening and closing operation 65 of the lid body can be performed by remote control, and the opening and closing operation of the lid body 60 can be performed near the driver's seat 6, for example.

[0121] The vehicle also includes a roof 9 formed to be hollow, and an air conditioning unit 26 provided inside the roof 9 , and the rear pillar 14 has an outside air inlet 37 a that connects an interior 38 of the pillar with the interior of the roof 9 .

[0122] If an outside air inlet for taking in outside air inside the roof 9 is provided on the roof 9 of the cabin 1, the outside air will be warmed by the roof 9 which is exposed to strong sunlight, resulting in a decrease in performance of the air conditioning unit 26, but in this embodiment, outside air can be circulated over a short distance from a place less affected by sunlight to the air conditioning unit 26, thereby improving the performance of the air conditioning unit 26. Also, compared to when an outside air inlet is provided on the roof 9 of the cabin 1, the appearance of the roof 9 can be improved.

[0123] The rear pillar 14 also has a partition wall 67 that divides the pillar interior 38 into a ventilation flow passage 68 that circulates the outside air taken in from the exterior opening 55 to the interior opening 59, and an outside air introduction passage 69 that circulates the outside air taken in from the exterior opening 55 to the outside air introduction port 37a, and an outside air filter 70 that is attached to the partition wall 67 and removes dust in the outside air flowing from the exterior opening 55 to the outside air introduction passage.

[0124] According to this configuration, dust in the outside air taken in from the indoor opening 59 can be removed and the air can be circulated to the air conditioning unit 26.

[0125] The cabin 1 includes an inner roof 24 that forms the ceiling portion inside the cabin, and a resonator 86 that reduces muffled noise generated inside the cabin, the inner roof 24 being formed from resin, and the resonator 86 being integrally molded with the inner roof 24 using the resin that forms the inner roof 24.

[0126] According to this configuration, the parts for mounting the resonator 86 to the inner roof 24 are separately provided. Therefore, the resonator 86 can be installed in the inner roof 24 without requiring any additional space and without incurring additional costs.

[0127] The vehicle also has a driver's seat 6 located inside the cabin, and the resonator 86 is located above the driver's seat 6 and has at least one resonance tube (first resonance tube 86A to third resonance tube 86C), and the resonance tubes 86A to 86C are formed in a long cylindrical shape in the front-to-rear direction, have a closed front end, and have an opening hole 87 at the rear end that opens into the cabin.

[0128] This configuration can reduce noise around the operator's ears.

[0129] The resonator 86 also includes a plurality of resonance tubes (first resonance tube 86A to third resonance tube 86C) that are arranged side by side in the width direction of the inner roof 24 and have different lengths.

[0130] According to this configuration, the resonator 86 for reducing noise at the operator's ears can be provided in a compact manner on the inner roof 24.

[0131] In addition, the inner roof 24 has a downwardly opening recess 88 formed by recessing the wall portion that forms the inner roof 24 upward, and the resonator 86 is integrally molded with an upper wall 88b of the recess 88.

[0132] According to this configuration, the head clearance can be prevented from being narrowed by the resonator 86.

[0133] Further, the resonator 86 protrudes upward and downward from an upper wall 88b of the recess 88.

[0134] According to this configuration, it is possible to ensure head clearance for the operator.

[0135] The cabin 1 is mounted on an aircraft body 3, and includes a first front pillar 13L and a second front pillar 13R arranged side by side with a gap in the width direction of the cabin 1, a first rear pillar 14L arranged behind the first front pillar 13L and a second rear pillar 14R arranged behind the second front pillar 13R, a front upper frame 15 connecting the upper parts of the first front pillar 13L and the second front pillar 13R, and a front upper frame 16 connecting the upper parts of the first rear pillar 14L and the second rear pillar 14R. The vehicle body comprises a rear upper frame 16 that connects the first front pillar 13L and the first rear pillar 14L, a first side upper frame 18L that connects the upper parts of the first front pillar 13L and the first rear pillar 14L, and a second side upper frame 18R that connects the upper parts of the second front pillar 13R and the second rear pillar 14R, and the front upper frame 15 is formed in a curved shape that protrudes upward in a front view, and the first side upper frame 18L and the second side upper frame 18R are formed in a curved shape that protrudes upward in a side view.

[0136] According to this configuration, by forming the front upper frame 15, the first side upper frame 18L, and the second side upper frame 18R in a curved shape that protrudes upward, the strength of the cabin 1 and visibility can be improved.

[0137] Further, the first side upper frame 18L and the second side upper frame 18R are inclined in an inward manner in the width direction as they extend upward, and are curved upward in an arc shape.

[0138] According to this configuration, the first side upper frame 18L and the second side upper frame 18R can be aligned with the curved panel without bending the first side upper frame 18L and the second side upper frame 18R outward in the width direction of the cabin 1. In addition, since the first side upper frame 18L and the second side upper frame 18R do not need to be curved outward in the width direction of the cabin 1, when manufacturing cabins 1 with different front-to-rear lengths, it is possible to manufacture cabins 1 with different front-to-rear lengths by making the lengths of the first side upper frame 18L and the second side upper frame 18R different.

[0139] Further, the rear end sides of the first side upper frame 18L and the second side upper frame 18R are provided at the same height as the rear upper frame 16.

[0140] According to this configuration, by reducing the height difference between the rear end sides of the first side upper frame 18L and the second side upper frame 18R and the rear upper frame 16, the sealing member can be arranged continuously from the first side upper frame 18L and the second side upper frame 18R to the rear upper frame 16.

[0141] In addition, a first seal receiver 97L, which is in contact with a seal member disposed from one side of the upper surface of the front upper frame 15 to the upper surface of the first side upper frame 18L, and a first seal receiver 97L, which is in contact with the first seal receiver 97L, and a second seal receiver 97R against which a seal member disposed from the other side of the top surface of the frame 15 to the top surface of the second side upper frame 18R comes into contact.

[0142] According to this configuration, the seal members can be continuously arranged from the curved first and second side upper frames 18L, 18R to the curved front upper frame 15.

[0143] The first rear pillar 14L has a first upper wall portion 37L into which the rear portion of the first side upper frame 18L fits downward, and the second rear pillar 14R has a second upper wall portion 37R into which the rear portion of the second side upper frame 18R fits downward.

[0144] With this configuration, the sealing member can be arranged continuously from the upper surface of the first side upper frame 18L to the first upper wall portion 37L, and the sealing member can be arranged continuously from the upper surface of the second side upper frame 18R to the second upper wall portion 37R.

[0145] Although one embodiment of the present invention has been described above, the embodiment disclosed herein should be considered as illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0146] 1 Cabin 2. Aircraft 13L Left front pillar 13R Right front pillar 14L Left rear pillar 14R Right rear pillar 15 Front upper frame 16 Rear upper frame 18L Left side upper frame 18R Right side upper frame 27 Doors 28 Entrance gate 37 Upper wall 41 Door contact part (first part) 41a Upper 53 1st communication opening

Claims

1. A cabin installed in an aircraft, Left and right front pillars arranged side by side at an interval in the width direction of the cabin; a left rear pillar disposed rearward of the left front pillar and a right rear pillar disposed rearward of the right front pillar; a front upper frame connecting upper portions of the left and right front pillars and a rear upper frame connecting upper portions of the left and right rear pillars; left and right side upper frames connecting upper portions of the front pillar and the rear pillar on the same left and right side; Equipped with the front upper frame is formed in a curved shape that protrudes upward when viewed from the front, a height of a central portion in the width direction is higher than an upper end portion of the front pillar, and left and right ends are connected to an upper portion of the front pillar at positions that are a predetermined distance lower than the upper end portion of the front pillar, The side upper frame is formed in a curved shape that protrudes upward in a side view and gradually transitions upward as it moves from both fore-and-aft ends toward the center in the fore-and-aft direction, and the upper end, which is the top surface of the center in the fore-and-aft direction, is at approximately the same height as the upper end of the front pillar, and the front end is connected to the front pillar at a position lower than the height of the end of the front upper frame.

2. The cabin has a roof, the rear pillar has an upper wall portion that is a wall portion at an upper end thereof, the upper wall portion including an opening communicating with an interior of the roof and an extension portion that extends forward from a portion that forms the opening beyond the opening, 2. The cabin according to claim 1, wherein a rear portion of the side upper frame curves downward toward the rear and enters below the extending portion of the upper wall portion.

3. a door supported by the rear pillar for opening and closing an entrance to the cabin; the rear pillar has a door abutment portion with which the door abuts via a seal material, The door abutment portion extends downward from an outer end of the extension portion of the upper wall portion in the width direction. and a top portion formed by The cabin according to claim 2 , wherein a rear portion of the side upper frame is disposed below the extension portion and inward in the width direction of the upper portion of the door abutment portion.

4. A cabin installed in an aircraft, Left and right front pillars arranged side by side at an interval in the width direction of the cabin; a left rear pillar disposed rearward of the left front pillar and a right rear pillar disposed rearward of the right front pillar; a front upper frame connecting upper portions of the left and right front pillars and a rear upper frame connecting upper portions of the left and right rear pillars; left and right side upper frames connecting upper portions of the front pillar and the rear pillar on the same left and right side; Equipped with the front upper frame is formed in a curved shape that protrudes upward when viewed from the front, a height of a central portion in the width direction is higher than an upper end portion of the front pillar, and left and right ends are connected to an upper portion of the front pillar at positions that are a predetermined distance lower than the upper end portion of the front pillar, The rear pillar is formed hollow and has a first communication opening at an upper portion thereof that communicates an interior of the rear pillar with the outside of the cabin, The cabin is arranged such that the height position of the lower end of the rear end portion corresponds to the height position of the upper portion of the first communication opening.

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