JP2015083470A - Cabin of tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a rear glass to take a wide opening position even when a cabin rear upper part is protruded rearward.SOLUTION: A tractor body 2 is equipped with a cabin 1 and an air conditioner body 39. In the cabin 1, a cabin framework is formed by connecting a cabin ceiling part 9 to right and left fenders 10 with rear pillars 11 and by connecting the cabin ceiling part 9 to right and left steps 12 with front pillars 13. A door 15 is equipped on each of the right and left rear pillars 11 via hinge fittings 14 to be openable and closable. An installation part 29 of a rear glass 28 is formed by connecting upper and lower ends of the right and left rear pillars 11 with upper and lower rear connection elements 30, 31. The rear glass 28 is installed to the installation part 29 via hinge fittings 28A. A rear upper part of the cabin 1 is protruded more rearward than the rear glass 28 in a closed position, and the underside of the protruded part is formed in an inclined face rising rearward, which enables the opening of the rear glass 28 to increase.

Description

  The present invention relates to a cabin of a tractor, and more specifically to a cabin skeleton made of sheet metal.

A tractor cabin that surrounds a maneuvering device and is mounted on a tractor vehicle body is known, and has been proposed in, for example, Japanese Patent Application Laid-Open No. 8-108741.
According to the prior art, “[0014] An air conditioner unit 33 including an evaporator, a blower and the like is disposed between the lower part of the right fender 14 and the transmission case 6 below the driver's seat 23 and the floor plate 20. , "," [0018] The duct 38 is connected with another duct 40, which is branched into two on the way, one of which is the opening 36 of the left fender 14, the inside of the reinforcing member 34, and the communication hole. 31, passes through the left intermediate strut 11, is connected to a grill 41 provided on the interior material 11 b of the left intermediate strut 11, and conditioned air is blown from the grill 41 into the cabin. The other of them passes through the left side of the vehicle body 1 below the floor plate 20 and reaches the inside (front side) of the interior cover 25, where it further branches and is connected to a grill 26 provided on the interior cover 25. Has a configuration that is adapted to the conditioned air is blown into the cabin interior from the grill 26. ".

  JP-A-8-108741

  In the prior art, the other side of the duct 40 passes through the left side of the vehicle body 1 below the floor plate 20, reaches the inside (front side) of the interior cover 25, and only one rises inside the interior cover 25. 20 does not pass through, the front part rises, and the upper part thereof has two branch ducts connected to the left and right grills 26, and is arranged at a position where the ducts may be damaged. The range to blow out is also limited.

In addition, there was little supply of air conditioning airflow to the operator seated on the seat.
SUMMARY OF THE INVENTION An object of the present invention is to provide a tractor cabin in which the rear glass opening posture can be greatly increased even when the rear upper portion of the cabin projects rearward.

Specific means for solving the problems in the present invention are as follows.
First, the cabin 1 and the air conditioner main body 39 are mounted on the tractor body 2. The cabin 1 connects the cabin ceiling portion 9 and the left and right fenders 10 with the rear pillars 11 and the left and right steps with the cabin ceiling portion 9. 12 is connected to the front pillar 13 to form a cabin skeleton body,
The left and right rear pillars 11 are provided with doors 15 that can be opened and closed via hinge fittings 14, and upper and lower ends of the left and right rear pillars 11 are connected by upper and lower rear coupling bodies 30 and 31 to form a mounting portion 29 for the rear glass 28. The rear glass 28 is attached to the attachment portion 29 via the hinge fitting 28A.
The rear upper portion of the cabin 1 protrudes rearward from the closed rear glass 28, and the lower surface of the protruding portion is formed as a rear upward inclined surface capable of increasing the opening degree of the rear glass 28.

Second, the upper rear coupling body 31 and the rear pillar 11 are formed in a hollow structure in order to constitute a duct of an outside air introduction path communicating with the air conditioner body 39,
The rear projecting portion of the cabin ceiling 9 is formed by an outside air introduction body 35 provided on the upper rear coupling body 31 for introducing outside air, and the lower surface of the projecting portion has a planar filter on the rear upward inclined surface. The outside air introduction surface 35A is detachably provided.

Thirdly, the cabin ceiling 9 has an outer roof 52 on the outer surface side of the cabin 1 and the cabin 1.
An inner roof 53 on the inner surface side, and a speaker 51 is disposed between the outer roof 52 and the inner roof 53 on the rear side of the cabin ceiling 9, and the speaker 51 is exposed from the inner roof 53 into the cabin 1. The exposed surface is substantially flush with the inner surface of the inner roof 53.

Fourth, in the tractor cabin that surrounds the maneuvering device and is mounted on the tractor vehicle body via the anti-vibration support,
The sheet metal cabin ceiling and the left and right steps are connected by a sheet metal front pillar, the cabin ceiling and the sheet metal left and right fenders are connected by a sheet metal rear pillar, and the left and right fenders connect the seat mounting part. A door that is coupled to a sheet metal floor sheet and that opens and closes the entrance on the step is attached to the rear pillar via an upper and lower hinge fitting,
A lower rear connecting body that connects the lower ends of the left and right rear pillars or the upper ends of the left and right fenders and an upper rear connecting body that connects the upper ends of the left and right rear pillars protrude from the left and right rear pillars backward. Provided,
A rear glass mounting portion is configured by the rear edge portions of the left and right rear pillars to which the door is mounted and the upper and lower rear coupling bodies, and the upper end of the rear glass is mounted to the mounting portion via a hinge fitting so that the rear glass can be opened and closed. A wiper is provided.

According to the present invention, even when the rear upper part of the cabin protrudes rearward, the rear glass can be greatly opened.
In the invention according to claim 1, even if the rear upper part of the cabin 1 protrudes rearward from the rear glass 28 in the closed position, the lower surface of the protruding part is formed as a rear upward inclined surface capable of increasing the opening degree of the rear glass 28. Therefore, the opening posture of the rear glass 28 can be increased upward.

In the invention according to claim 2, the protruding portion at the rear portion of the cabin ceiling portion 9 is formed by the outside air introduction body 35, and the outside air can be introduced into the cabin 1, and the outside air is introduced into the rear upward inclined surface of the lower surface of the protruding portion. Since the surface 35A is formed, the area of the outside air introduction surface 35A can be made larger than that in the horizontal plane.
According to the third aspect of the present invention, the speaker 51 can be disposed between the outer roof 52 and the inner roof 53 constituting the cabin ceiling portion 9, and the exposed surface in the cabin 1 of the speaker 51 is substantially the same as the inner surface of the inner roof 53. As a result, the protruding into the cabin 1 can be reduced.

  In the invention according to claim 4, the rear edge of the left and right rear pillars to which the door is attached and the upper and lower rear coupling body can constitute a rear glass attachment part, and the upper end of the rear glass is connected to the attachment part via a hinge fitting. Can be freely opened and closed, and a wiper can be provided on the rear glass.

It is a side view of the cabin concerning the present invention. It is a front view of the cabin concerning the present invention. It is a rear view of the cabin concerning the present invention. It is a top view which shows the left half of the ceiling part of the cabin which concerns on this invention. It is a top view of the left half of the floor sheet of the cabin concerning the present invention. It is a perspective view showing the 1st example of the cabin concerning the present invention. It is a perspective view which shows the 2nd example of the cabin which concerns on this invention. It is a perspective view which shows the 3rd example of the cabin which concerns on this invention. It is a perspective view which shows the joining connection state of a front pillar. It is the perspective view seen from the back of a cabin, and the rear door closed state is shown. It is the perspective view seen from the back of a cabin, and the rear door opened state is shown. It is the perspective view which abbreviate | omitted the ceiling part which showed the duct structure of the cabin. It is a perspective view which shows the ceiling part of FIG. It is explanatory drawing of an air-conditioning flow. It is sectional drawing of a room lamp attaching part. It is a principal part enlarged view of FIG. It is sectional drawing of a speaker attachment part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1 showing the entire side of the cabin 1 of the tractor according to the present invention, FIG. 2 showing the entire front (front), and FIG. 3 showing the entire back (rear), the cabin 1 is attached to the tractor vehicle body 2. The cabin 1 is mounted via an anti-vibration support provided on the front, rear, left and right (not shown). The cabin 1 surrounds a steering operation device 5 configured by arranging a steering handle 3 and a seat 4 on the front and rear. Yes.

The tractor vehicle body 2 is substantially constituted by a transmission case, and is provided with a hydraulic device 7 for raising and lowering a work machine having a pair of left and right lift arms 6 on the upper surface of the rear part thereof. Show.
The cabin 1 connects a sheet metal cabin ceiling 9 and a sheet metal left and right fender 10 with sheet metal pillars 11, and connects the sheet metal cabin ceiling 9 and the left and right steps 12 to a sheet metal pillar or A cabin skeleton body is configured by being connected by a steel pipe pillar 13, and the left and right steps 12 are substantially used as entrances / exits for the steering operation device 5. 15 is provided as freely openable.

The left and right doors 15 are opened and closed around the inclined axis XX in the rearward and downward direction by the upper and lower hinge fittings 14 with respect to the pillar 11, so that the front lower part of the door is in the rearwardly upward shape in the step 12 portion when opened. This makes it easier to get on and off by expanding the boarding space.
The left and right fenders 10 are composed of an elevation surface portion 10A and a top plate portion 10B having an arcuate front and downward shape covering the rear wheel 8 at the upper portion, and ribs 10C are formed on the elevation surface portion 10A. The rigidity is improved by being (formed at the time of press molding).

  In the left and right fenders 10, the left and right end plates of the sheet metal floor sheet 16 are joined to each other by spot welding, flange bolt connection, or the like, and the floor sheet 16 is connected to the seat mounting part 17 in the rear half part and the front half part. The walk-through portion 18 is formed with a level difference through a step portion 19, and an inspection window 17A is formed in the seat mounting portion 17 as shown in FIG. 5, and the window 17A is detachable. A seat 4 is mounted via a seat support in a state of being closed by a cover (not shown), and a notch 18A is formed in the walk-through portion 18 as shown in FIG. A steering box having a steering handle 3, a pedal and the like is erected using the periphery of 18A.

Further, the back plate 20 is connected to the seat mounting portion 17 of the floor seat 16, and the back plate 20 is erected on the rear side of the backrest of the seat 4, and the left and right end surfaces of the back plate 20 stand on the left and right fenders 10. It is joined to the rear of the surface portion 10A by spot welding, flange bolt means or the like.
Here, the floor sheet 16 is formed by integrally forming the walk-through portion 18, the seat mounting portion 17, and the back plate 20 by press molding of sheet metal, and as shown in FIGS. 7 to 9, the reinforcing rib 21 and the change lever guide hole. 22 etc. are formed.

However, the floor sheet 16 may be formed by individually press-molding the walk-through part 18, the seat mounting part 17, and the back plate 20 and joining them, and the form of the reinforcing rib 21 is also arbitrary.
In the cabin 1 shown in FIGS. 1 to 3, the ceiling portion 9 and the left and right fenders 10 are both made of sheet metal, and the rear side of the ceiling portion 9 and the rear side of the left and right fenders 10 are made of sheet metal pillars 11. Are connected via a connecting portion 23, and the connecting portion 23 is substantially spot-welded, and the connecting portion 23 is bent toward the ceiling 9 and the fender 10 so as to be bent back and forth. Thus, even if an external force is applied due to stress dispersion, buckling is prevented, and the left and right fenders 10 are substantially made of sheet metal, so that the tractor vehicle body is supported in the state where the external force is supported through its elastic deformation. 2 is mounted.

The pillar 13 that connects the front end portion of the ceiling portion 9 and the front end portions of the left and right steps 12 is made of steel in the embodiment shown in FIGS. 1 to 3, specifically a substantially gourd-shaped deformed steel pipe. The pillar 13 enhances the rigidity of the cabin 1.
In this case, as shown in FIG. 9, the upper mounting bracket 24 has an insertion portion 24 </ b> A that fits the hole 13 </ b> A of the pillar 13 and a spot weld portion 24 </ b> B with respect to the lower surface of the ceiling, and the insertion portion 24 </ b> A is in the hole 13 </ b> A of the pillar 13. The inner metal fitting 25 is arc welded to the outer periphery of the pillar 13 while being inserted and arc welded. On the other hand, the lower mounting metal fitting 26 has its recess 26A in contact with the inner outer periphery of the pillar 13 for arc welding. In this way, the mounting bracket 24, the lining bracket 25, and the lower mounting bracket 26 are fixed in advance on the upper and lower sides of the pillar 13, respectively, and the spot welded portions 24B and 25A are formed in the assembly (production) line. Spot welding is performed on the ceiling portion 9, and the spot welding portion 26 </ b> B is spot-welded in step 12.

  Here, the mounting bracket 24, the lining bracket 25, the lower mounting bracket 26, etc. constitute a connecting portion, and the front portion of the cabin 1 is framed by the front edge of the ceiling portion 9, the left and right pillars 13 and the like. An outer fitting recess of the bonnet 27 is formed in the lower center portion of the frame, and a front glass is stretched over the entire surface including the left and right sides (skirt portions) of the bonnet 27 through a weather strip, etc. Although not shown, the front glass is provided with a wiper or the like.

  The pillar 13 may be made of sheet metal. In this case, the pillar 13 is joined to the upper end portion of the pillar 13 via the divergent connecting portion 23 at the left and right front ends of the ceiling portion 9. As shown in FIG. 2, the pillar 13 is bent outwardly from the cabin so that the front view through the front glass is improved and the living space of the cabin 1 is expanded.

In the cabin 1 shown in FIGS. 1 to 3, the pillar 11 is arranged (standing) slightly not on the side of the seat 4 but slightly on the rear side, and the upper and lower ends of the pillar 11 are located behind the connecting portion 23. The mounting portion 29 of the rear glass 28 is configured by being stretched to the rear.
The mounting portion 29 includes a lower rear connecting body 30 that is U-shaped or U-shaped in a plan view connecting the lower end portions of the left and right pillars 11 or the upper end portions of the left and right fenders 10 to each other, and the left and right pillars. 11 is constituted by an upper rear coupling body 31 which is U-shaped or U-shaped in a plan view connecting the upper end portions to each other, and rear edge portions of the left and right pillars 11. Substantially the upper edge of the back plate 20 in the floor sheet 16 is formed, while the upper rear connector 31 substantially forms the rear edge of the ceiling portion 9.

  The left and right corner portions 30A and 31A of the upper and lower rear coupling bodies 30 and 31 are substantially rounded, and the coupling bodies 30 and 31 are bent outwardly from the cabin, thereby increasing the rear visibility. In addition, the cabin space is increased, and the left and right pillars 11 are located slightly behind the seat 4 and located in front of the left and right corner portions 30A and 31A, so that the visibility on both sides of the rear is improved.

  The upper portion of the rear glass 28 that is spherical and expands outward is attached to the mounting portion 29 through a hinge fitting 28A so as to be freely opened and closed as shown in FIGS. 10 and 11, and the rear glass 28 is opened and closed. When the handle 32 is pushed backward by the operator, the handle 32 is slowly opened through the pair of left and right gas damper members 33, while the handle 32 is pulled forward against the gas pressure of the gas damper member 33. Is closed slowly, and the closed posture can be maintained by a locking device (not shown).

  Here, the rear glass 28 is provided with an elastic rim material 28B such as a weather strip on the periphery thereof to constitute a U-shaped rear hatchback in plan view. The rear glass 28 is provided with a wiper 34, and an air conditioner (referred to as an air conditioner, such as cooling, heating, cooling / heating, blowing, The outside air introduction body 35 is provided with a function such as ventilation, and the outside air introduction surface 35A of the outside air introduction body 35 is detachably (replaceable).

The outside air introduction surface 35A is a rear-upward inclined surface, so that the opening degree of the rear glass 28 can be enlarged and the filter surface can be enlarged.
In this embodiment, since the outside air introduction body 35 is provided, the upper rear connection body 31 has a hollow structure to form a duct of the outside air introduction path, and the left and right pillars 11 connected to the upper rear connection body 31 are also included. A hollow structure is used to configure the duct of the outside air introduction path, and as shown by an arrow A in FIG. 12, the back of the floor seat 16 is formed through a duct (not shown) formed in the lower part of the left and right pillars 11 and the fender 10. It can be introduced into the inside / outside air introduction switching damper device via a duct 36 formed in the face plate 20 portion.

An inside air inlet 37 is formed in the duct 36, and the duct 36 is connected to an air conditioner main body (referred to as an air conditioner main body, having an evaporator, a blower, etc.) 39 via a connection duct 38.
Referring to FIG. 12, the air conditioner main body 39 is detachably attached to the lower portion of the cabin 1 between one elevation surface portion 10 </ b> A of the left and right fenders 10 and the side surface of the tractor vehicle body 2. The upper part is covered, and the living space of the cabin 1, in particular, the head clearance is enlarged by arranging the air conditioner main body 39 close to the side of the seat 4 compared to the air conditioner main body 39 arranged on the ceiling portion 9. In addition to being able to prevent heat loss (heat energy loss) and pressure loss (pressure loss), the air conditioner hose (not shown) can be removed without being removed.

The outlet of the air conditioner main body 39 is an opening 40 formed substantially on one side (right side in the figure) of the stepped portion (elevated portion) 19 of the floor sheet 16, and the branch duct 41 communicates with the opening 40. Connected.
As shown in FIG. 12, the branch duct 41 is connected to the branch main duct 141 in one side (right fender side in the drawing), and the arcuate surface of the top plate portion 10 </ b> B in one (right side) fender 10. Is connected to the branch main duct 141 in front of the upright portion 19 of the floor sheet 16 and extends toward the other side (left fender). A connecting duct 341 that is connected to the connecting duct 341 and is connected along the arc surface of the top plate portion 10B of the other (left) fender 10; The left and right connecting ducts 541 are connected to the lower portions of the branch side ducts 241 and 441 and extend forward on the upper surfaces of the left and right steps 12, and the outer hood of the bonnet is formed. Is composed of a defroster duct 641 is communicatively connected to the communication duct 541 of the left and right are standing up at left and right with board 42.

  The branch duct 41 is preferably made of a hard resin molded product, but may be made of metal, and the left and right branch side ducts 241 and 441 may be integrally formed with the top plate portion 10B of the left and right fenders 10. In addition, the defroster duct 641 may be integrally formed with the mounting plate 42, and the left and right defroster ducts 641 may be communicated with each other by a horizontal duct along the upper edge of the mounting plate 42.

  The left and right branch side ducts 241 and 441 are formed with air outlets 43A and 43B at intervals in the vertical direction for the operator's trunk around the seat 4 (including the upper body of the thigh, buttocks, waist, abdomen, and shoulders). In addition, the air outlets 44A and 44B with respect to the foot portion, that is, slightly above step 12 are formed on the inside and outside at intervals in the vertical direction, and the lower air outlet 44B on the air outlet 44A and 44B is on the outside. It is possible to release sand or the like on the upper surface of the cabin out of the cabin.

In FIG. 12, the outlets 44A and 44B are shown only on the left side, but are formed in the branch side duct 241 in the same manner.
The connecting duct 341 is also formed with air outlets 45 at the left, right, left, and middle portions thereof, and the air outlet 46 facing rearward is formed at the joint between the duct 541 and the duct 641. 641 is provided with air outlets 48A and 48B with respect to the left and right skirt portions 47A and 47B of the front glass at an interval vertically.

In addition, when the left and right ducts 641 are communicated with each other through a horizontal duct, it is desirable that an air outlet be formed for the horizontal duct.
Further, the above-described air outlets (represented by 43A and 43B in FIG. 12) are provided with slats capable of changing the air direction, warm air (for heating), cool air (for cooling), exhaust The air supply direction (wind direction) such as wind (for ventilation) can be changed to a part desired by the operator.

Further, although not shown, it is desirable to make it possible to adjust the air supply amount and the air supply pressure by attaching a shutter capable of adjusting the opening area of the air outlet to large, medium and small together with the blades attached to the air outlet.
As shown in FIG. 14, the air supply direction B and the air flow C from the respective outlets are circulated with respect to the inside air introduction port 37, and the air flow occurs in the air conditioner main body 39. Short circuit (shortcut) of room air can be prevented at the room air introduction port 37, and the heat exchange efficiency is improved.

Several other useful embodiments of the cabin 1 skeleton will be described with reference to FIGS.
FIG. 6 shows a structure in which the main body 119 of the ceiling portion 9 and the floor sheet 16 are separated from each other as a sheet metal, and the left and right side edges 219, the pillars 11 and 13 and the left and right fenders 10 of the ceiling portion 9 are framed by spot welding or the like. is there.

In FIG. 7, the door frame 115 for the door 15 is made of sheet metal and is integrally formed. The door frame 115 is spot welded to the sheet metal floor sheet 16 via the top plate portion 10B of the left and right fenders 10 made of sheet metal. The top plate frame portions 115A of the left and right door frames 115 are joined to each other by spot welding at the ceiling portion 9 made of sheet metal.
FIG. 8 shows a sheet metal left and right fender 10 joined to the left and right side edges of the sheet metal floor sheet 16 by spot welding or bolts and nuts to form a unit, and a divergent shape at the front left and right of the sheet metal ceiling portion 9. The upper ends of the left and right steel pillars 13 are fixed by spot welding or arc welding via the connecting portion 23, and the lower ends of the left and right steel pillars 13 are fixed to the corner portion of step 12 by spot or arc welding. The left and right sides closer to the rear side of the ceiling part 9 and the top plate part 10B of the left and right fenders 10 are connected by a sheet metal pillar 11 via a connecting part 23, and the pillar 11 has a divergent shape part. The connecting portion 23 at its lower end is configured by spot welding to the top plate portion 10B of the fender.

As apparent from FIGS. 6 to 8, the sheet metal pillar 11 has a divergent shape in which the upper and lower ends extend in the front-rear direction through the bent portion, and the upper and lower ends project outward from the cabin. It is bent and has a three-dimensional structure to expand the cabin living space and facilitate molding by press molding.
When the pillar (including front, back, left and right) is made of sheet metal, the cross section is rectangular (flat) and has a hollow portion inside.

The cabin ceiling portion 9 is provided with a room lamp 50 at the center in the left-right direction on the front side and speakers 51 on the left and right sides at the rear side. FIGS. 15 and 16 show the configuration of the room lamp 50 as shown in FIG. FIG. 4 shows the mounting configuration of the speaker 51.
15 to 17, the ceiling portion 9 includes a sheet metal outer roof 52 and an inner roof 53 made of a foamed resin material (foamed PPO material) or the like. The outer roof 52 includes a lamp mounting bracket 54 and a speaker mounting bracket 55, respectively. Are fixed with bolts or the like, and these are covered with the inner roof 53 to improve the appearance, and the edges 52A and 53A of the roofs 52 and 53 are formed in an S-shaped cross section and an elastic trim (edge member) 56. The inner roof 53 is pressed against the outer roof 52 by the elastic force of the trim 56 by being fitted into the formed groove 56A, and by providing the trim 56, the door 15 is opened and closed. It is also prevented from fluttering.

1 Cabin 9 Ceiling 10 Fender 11 Pillar (Rear)
12 Step 13 Pillar (front)
15 door
16 Floor sheet

Claims (4)

The cabin (1) and the air conditioner main body (39) are mounted on the tractor body (2), and the cabin (1) is formed by connecting the cabin ceiling (9) and the left and right fenders (10) with the rear pillar (11). And connecting the cabin ceiling (9) and the left and right steps (12) with the front pillar (13) to form a cabin skeleton,
The left and right rear pillars (11) are provided with doors (15) that can be opened and closed via hinge fittings (14), and the upper and lower ends of the left and right rear pillars (11) are connected by upper and lower rear coupling bodies (30, 31). A rear glass (28) mounting portion (29) is configured, and the rear glass (28) is mounted to the mounting portion (29) via a hinge fitting (28A).
The rear upper part of the cabin (1) protrudes rearward from the rear glass (28) in the closed position, and the lower surface of the protruding part is formed as a rear upward inclined surface capable of expanding the opening degree of the rear glass (28). A tractor cabin characterized by. The upper rear coupling body (31) and the rear pillar (11) of the coupling section (23) are formed in a hollow structure in order to constitute a duct of an outside air introduction path communicating with the air conditioner body (39),
The rear projecting portion of the cabin ceiling (9) is formed by an outside air introduction body (35) provided on the upper rear coupling body (31) for introducing the outside air, and the lower surface of the projecting portion is inclined rearwardly upward. 2. The tractor cabin according to claim 1, wherein the surface is an outside air introduction surface (35 </ b> A) having a surface filter detachably attached thereto. 3.   The cabin ceiling (9) has an outer roof (52) on the outer surface side of the cabin (1) and an inner roof (53) on the inner surface side of the cabin (1), and the outer roof on the rear side of the cabin ceiling (9). A speaker (51) is disposed between the inner roof (53) and the inner roof (53). The speaker (51) is exposed from the inner roof (53) into the cabin (1), and the exposed surface is exposed to the inner roof (53). The tractor cabin according to claim 1, wherein the tractor cabin is substantially flush with an inner surface of the tractor. In the cabin of the tractor that surrounds the steering operation device and is mounted on the tractor body via the anti-vibration support,
The sheet metal cabin ceiling and the left and right steps are connected by a sheet metal front pillar, the cabin ceiling and the sheet metal left and right fenders are connected by a sheet metal rear pillar, and the left and right fenders connect the seat mounting part. A door that is coupled to a sheet metal floor sheet and that opens and closes the entrance on the step is attached to the rear pillar via an upper and lower hinge fitting,
A lower rear connecting body that connects the lower ends of the left and right rear pillars or the upper ends of the left and right fenders and an upper rear connecting body that connects the upper ends of the left and right rear pillars protrude from the left and right rear pillars backward. Provided,
A rear glass mounting portion is configured by the rear edge portions of the left and right rear pillars to which the door is mounted and the upper and lower rear coupling bodies, and the upper end of the rear glass is mounted to the mounting portion via a hinge fitting so that the rear glass can be opened and closed. A tractor cabin characterized by a wiper.

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