Construction machinery cab and construction machinery

Abstract

To improve the cooling sensation inside the cab. [Solution] The cab 12 comprises a side wall 41S2, a front wall 41F located in front of the side wall 41S2, an air conditioning unit 30 positioned adjacent to the side wall 41S2, front air outlets 51, 52, 53 positioned between the front wall 41F and the air conditioning unit 30, and a first duct 56 connecting the air conditioning unit 30 and the front air outlets 51, 52, 53.

Description

Technical Field

[0001] The present disclosure relates to a cab for a construction machine and a construction machine.

Background Art

[0002] Patent Document 1 discloses a cab for a construction machine provided with an air conditioner unit.

Prior Art Literature

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] An object of the present disclosure is to improve the cooling sensation inside the cab of a construction machine.

Means for Solving the Problem

[0005] A cab for a construction machine according to the present disclosure includes a side wall, a front wall positioned in front of the side wall, an air conditioner unit arranged adjacent to the side wall, a front air outlet arranged between the front wall and the air conditioner unit, and a first duct connecting the air conditioner unit and the front air outlet.

Effects of the Invention

[0006] According to the present disclosure, the cooling sensation inside the cab can be improved in the cab of a construction machine.

Brief Description of the Drawings

[0007] [Figure 1] It is a perspective view of the cab as viewed from the outside. [Figure 2] It is another perspective view of the cab as viewed from the outside. [Figure 3]This is a top-down cross-sectional view showing the inside of the cab. [Figure 4] This is a top view showing the air conditioning unit and multiple ducts. [Figure 5] This is a perspective view showing the air conditioning unit and multiple ducts. [Figure 6A] This diagram shows how the airflow from the front outlet hits the operator's head. [Figure 6B] This diagram shows how the airflow from the upper outlet hits the operator's head. [Figure 7] This is a view from above, showing a magnified view of the area around the intermediate pillar. [Figure 8] This is a schematic diagram showing the relationship between the intermediate pillar body and the vertically extending portion of the upper duct. [Figure 9] This diagram shows the maintenance work performed on the air conditioning unit inside the cab. [Figure 10A] This is a diagram illustrating the procedure for replacing the blower motor from the outside of the cab, showing the cab with the air cover attached. [Figure 10B] This is a diagram illustrating the procedure for replacing the blower motor from the outside of the cab, showing the outside air cover, outside air filter, and outside air duct removed. [Modes for carrying out the invention]

[0008] Preferred embodiments of this disclosure are described below.

[0009] Figures 1 to 3 show the cab 12 according to this embodiment. The cab 12 is a cab for construction machinery, specifically the cab of an articulated dump truck.

[0010] The cab 12 comprises a cab body 40 that forms its outer shell, an operator's seat 21, and an air conditioning unit 30.

[0011] The cab body 40 comprises a front wall 41F, a rear wall 41R, a first side wall 41S1, a second side wall 41S2 (side wall), and a top wall 41T.

[0012] The first side wall 41S1 is located on one widthwise side relative to the operator seat 21. The first side wall 41S1 includes an entrance and exit 42, and a door 43 that opens and closes the entrance and exit 42. The door 43 is a front-opening door that is provided with a hinge on the rear side and opens by pivoting on the front side.

[0013] The second side wall 41S2 is located on the other widthwise side relative to the operator seat 21. The second side wall 41S2 is not provided with any entrance or exit.

[0014] The front wall 41F, the rear wall 41R, the first side wall 41S1 and the second side wall 41S2 are each composed of a transparent portion formed of a windshield 44F or the like and a non-transparent portion. The ceiling wall 41T is composed only of a non-transparent portion.

[0015] The operator seat 21 is provided at a substantially central position in the width direction inside the cab 12. However, when viewed in more detail, the widthwise center of the operator seat 21 is located at a position offset toward the other widthwise side relative to the widthwise center of the entire cab 12. The operator seat 21 is configured to be slidable in the front-rear direction.

[0016] The air conditioner unit 30 is disposed adjacent to the second side wall 41S2 inside the cab 12. The air conditioner unit 25 is also adjacent to the rear wall 41R. The air conditioner unit 25 is disposed on the other widthwise side of the operator seat 21 so as not to overlap the operator seat 21 in the width direction.

[0017] (First front air outlets 51, 52, 53, first front duct 56) As shown in FIGS. 3 to 5, the cab 12 includes a plurality of first front air outlets 51, 52, 53 located in front of the operator seat 21, and a first front duct 56 (first duct) that connects the air conditioner unit 30 and the plurality of first front air outlets 51, 52, 53.

[0018] As shown in Figure 3, each of the multiple first front air outlets 51, 52, and 53 is provided on the dashboard 29. The multiple first front air outlets 51, 52, and 53 include multiple first front air outlets 51 and 52 configured to blow air toward the operator in the operator's seat 21, and a first front air outlet 53 configured to blow air toward the assistant in the auxiliary seat 22. The auxiliary seat 22 is located to the left of the operator's seat 21 (one side in the width direction, on the side of the entrance 42).

[0019] The multiple first front air outlets 51, 52 include a pair of left and right central first front air outlets 51 and a pair of left and right outer first front air outlets 52L, 52R.

[0020] Each of the pair of left and right outer first front air outlets 52L and 52R is positioned so that the airflow to the operator's head while seated in the operator's seat 21 is not obstructed by the handle 23. The outer first front air outlet 52 is sometimes referred to as the handle avoidance air outlet 52. The position in which the air outlets are positioned so that the airflow to the operator's head is not obstructed by the handle 23 means that the straight line connecting the center of the air outlet and the center of the operator's head passes outside the outer shape of the handle 23.

[0021] Of the pair of left and right outer first front air outlets 52L and 52R, the outer first front air outlet 52R on the other side in the width direction (right side) is located further back than the outer first front air outlet 52L on the other side in the width direction (left side).

[0022] The first forward duct 56 comprises a front-rear extending portion 56A (first extending portion) that extends in the front-rear direction and a width-extending portion 56B (second extending portion) that extends in the width direction.

[0023] The front and rear extending portion 56A extends forward from the air conditioning unit 30. The widthwise extending portion 56B extends from the front side of the front and rear extending portion 56A toward one side in the widthwise direction.

[0024] The outer first front air outlet 52 on the other side (right side) in the width direction is connected to a portion of the front-to-rear extension 56A.

[0025] (Upper air outlet 61, upper duct 63) The cab 12 includes a plurality of upper air outlets 61R, 61L located above the head of the operator seated in the operator's seat 21, and an upper duct 63 (second duct) connecting the air conditioning unit 30 to the plurality of upper air outlets 61R, 61L.

[0026] The multiple upper air outlets 61R, 61L include a one-sided upper air outlet 61R located on one side in the width direction relative to the center of the operator's seat 21, and a other-sided upper air outlet 61L located on the other side in the width direction relative to the center of the operator's seat 21.

[0027] Each of the multiple upper air outlets 61R, 61L is positioned behind the head of the operator seated in the operator's seat 21. Naturally, each of the upper air outlets 61 is positioned so that the airflow to the head of the operator seated in the operator's seat 21 is not obstructed by the handle 23.

[0028] As shown in Figure 4, the upper duct 63 comprises a vertically extending portion 63A (third extending portion) that extends in the vertical direction, a front-to-back extending portion 63B (fourth extending portion) that extends in the front-to-back direction, and a widthwise extending portion 63C (fifth extending portion) that extends in the width direction.

[0029] The vertically extending portion 63A extends upward from the air conditioning unit 30. The front-rear extending portion 63B extends from the upper end of the vertically extending portion 63A toward the rear. The widthwise extending portion 63C extends from the rear end of the front-rear extending portion 63B toward one side in the widthwise direction.

[0030] The front and rear extensions 63B and the width extension 63C extend along the lower surface of the top wall 41T of the cab 12. Multiple upper air outlets 61R, 61L are connected to the width extension 63C.

[0031] (Lower air outlet 71, lower duct 73) The cab 12 includes a lower air outlet 71 located below the seat cushion 21A (seat surface) of the operator's seat 21, and a lower duct 73 connecting the air conditioning unit 30 and the lower air outlet 71.

[0032] The lower duct 73 includes an outlet forming section 74 located directly below the operator's seat 21, and a connecting section 75 that connects the air conditioning unit 30 to the outlet forming section 74.

[0033] The connecting section 75 connects the air conditioner unit 30 and the air outlet forming section 74 in the width direction.

[0034] The air outlet forming section 74 has a rectangular shape when viewed from above. The air outlet forming section 74 comprises a peripheral plate section 74A and a top plate section 74B. A lower air outlet 71 is formed in the peripheral plate section 74A. An opening 74B1 that penetrates vertically is formed in the top plate section 74B, but this opening 74B1 is blocked by the operator's seat 21.

[0035] (Second front air outlet 81, second front duct 82) The cab 12 includes a plurality of second front air outlets 81 located in front of the operator's seat 21, and a second front duct 82 connecting the air conditioning unit 30 to the plurality of second front air outlets 81.

[0036] Multiple second front air vents 81 are configured to function as defrosters to ensure visibility through the windshield 44F.

[0037] The second front duct 82 comprises a front-to-rear extending portion 82A that extends in the front-to-rear direction and a width-to-width extending portion 82B that extends in the width direction.

[0038] The front-rear extension portion 82A of the second front duct 82 is provided below the front-rear extension portion 56A of the first front duct 56. The widthwise extension portion 82B of the second front duct 82 is provided in front of the widthwise extension portion 56B of the first front duct 56.

[0039] (Rear air outlet 86, rear duct 87) The cab 12 includes a plurality of rear air outlets 86 located behind the operator's seat 21, and a rear duct 87 connecting the air conditioning unit 30 to the plurality of rear air outlets 86.

[0040] Multiple rear air vents 86 are configured to function as defrosters to ensure visibility through the rear window 44R.

[0041] The rear duct 87 comprises a front-rear extending portion 87A that extends in the front-rear direction and a width-extending portion 87B that extends in the width direction.

[0042] The front-to-rear extension portion 87A of the rear duct 87 is connected to the base end of the second front duct 82. As shown in Figure 4, the front-to-rear extension portion 87A of the rear duct 87 is positioned to pass directly above the air conditioning unit 30.

[0043] As shown in Figure 7, the cab body 40 is provided with an intermediate pillar body 45A (pillar) located on the other side in the width direction relative to the operator's seat 21. The intermediate pillar body 45A is located between the front wall 41F and the rear wall 41R of the cab body 40 in the front-rear direction. The vertically extending portion 63A of the upper duct 63 is provided along the intermediate pillar body 45A, at a position on the inside in the width direction of the intermediate pillar body 45A.

[0044] The intermediate pillar body 45A and the vertically extending portion 63A of the upper duct 63 are covered from the inside of the cab 12 by the intermediate pillar cover 45B. The intermediate pillar 45 is composed of the intermediate pillar body 45A, the vertically extending portion 63A of the upper duct 63, and the intermediate pillar cover 45B.

[0045] As shown in Figure 8, the vertically extending portion 63A of the upper duct 63 comprises an outer wall portion 63A1, an inner wall portion 63A2, a front wall portion 63A3 connecting the front ends of the outer wall portion 63A1 and the inner wall portion 63A2 in the width direction, and a rear wall portion 63A4 connecting the rear ends of the outer wall portion 63A1 and the inner wall portion 63A2 in the width direction.

[0046] The front-to-back dimension of the outer wall portion 63A1 is greater than the front-to-back dimension of the inner wall portion 63A2. As a result, the cross-sectional shape of the vertically extending portion 63A of the upper duct 63 is a trapezoidal shape in which the base on the outer side in the width direction is longer than the base on the inner side in the width direction.

[0047] As shown in Figure 7, the vertically extending portion 63A of the upper duct 63 is located behind the operator's eye point. As shown in Figure 8, the front wall portion 63A3 has a shape that extends substantially in the width direction, and the rear wall portion 63A4 has a shape that extends diagonally, inclined rearward toward the outside in the width direction.

[0048] As shown in Figure 9, the cab 12 is equipped with a posture-holding grip 49 fixed to the second side wall 41S2. Specifically, the posture-holding grip 49 is fixed to the intermediate pillar 45. The posture-holding grip 49 effectively functions to maintain the operator's posture when replacing the interior air filter 35 of the air conditioning unit 30 with the seat back 21B of the operator's seat 21 tilted forward.

[0049] As shown in Figures 5 and 10, the cab 10 includes an outside air duct 32, an outside air filter 33, and an outside air cover 34. The air conditioning unit 30 includes a blower motor 31.

[0050] The blower motor 31 is a component in which the motor and blower fan are integrated. The outside air duct 32 is provided so as to open to the second side wall 41S2 side of the cab body 40. The position where the outside air duct 32 opens is near the rear end of the cab body 40. The outside air filter 33 is located at the outlet of the outside air duct 32. The outside air cover 34 is provided so as to cover the outside air filter 33 from the outside of the cab 12.

[0051] As shown in Figure 10, the outside air cover 34, outside air filter 33, and outside air duct 32 are configured to be removable from a platform located on the outside of the cab 12. The cab 12 is then configured so that the blower motor 31 can be replaced from the platform located on the outside of the cab 12 through the opening formed by removing these components.

[0052] <Effects and Effects> Next, the effects and advantages of this embodiment will be described.

[0053] This embodiment relates to a cab 12 of a construction machine. As shown in Figures 3 to 5, the cab 12 comprises an operator's seat 21, an air conditioning unit 30, one or more front air outlets 51, 52, 53 located in front of the operator's seat 21, a front duct 56 connecting the air conditioning unit 30 and the one or more front air outlets 51, 52, 53, and a cab body 40 having an entrance / exit 42 provided in a first side wall 41S1 located on one side in the width direction relative to the operator's seat 21.

[0054] By the way, when using air conditioning in the cab 12 of a construction machine, increasing the amount of airflow directed at the operator makes it easier to feel cool. Here, if the air conditioning unit 30 is located behind the operator's seat 21, and a duct extends from the air conditioning unit 30 in the width direction, the total length of the duct to the front outlets 51, 52, and 53 tends to be long. When the total length of the duct is long, the duct resistance increases, and the amount of air coming out of the front outlets 51, 52, and 53 tends to decrease. Therefore, in this embodiment, as shown in Figures 3 and 4, the cab 12 comprises a side wall 41S2, a front wall 41F located in front of the side wall 41S2, an air conditioning unit 30 positioned adjacent to the side wall 41S2, front air outlets 51, 52, and 53 positioned between the front wall 41F and the air conditioning unit 30, and a first duct 56 connecting the air conditioning unit 30 and the front air outlets 51, 52, and 53. As a result, the air conditioning unit 30 is positioned adjacent to the second side wall 41S2 of the cab body 40, which is located on the other side in the width direction relative to the operator's seat 21. Therefore, as shown in Figure 4, the front duct 56 can be extended forward from the air conditioning unit 30, eliminating the need for the portion of the front duct 56 that extends in the width direction behind the operator's seat 21 to connect to the front air outlets 51, 52, and 53. Consequently, the total length of the duct to the front air outlets 51, 52, and 53 can be shortened, allowing for a greater volume of air to be released from the front air outlets 51, 52, and 53. As a result, the feeling of coolness can be improved.

[0055] Furthermore, in this embodiment, as shown in Figure 3, one or more front air outlets 51, 52, 53 include one or more handle-avoiding air outlets 52 that are positioned so as not to obstruct the airflow to the head of the operator seated in the operator's seat 21 by the handle 23. Therefore, compared to the case where one or more front air outlets 51, 52, 53 do not include one or more handle-avoiding air outlets 52, the cooling sensation can be improved.

[0056] Furthermore, in this embodiment, as shown in Figure 3, one or more handle avoidance outlets 52 include one handle avoidance outlet 52L located on one side in the width direction relative to the handle 23, and the other handle avoidance outlet 52R located on the other side in the width direction relative to the handle 23. Therefore, the cooling sensation can be improved compared to a case where one or more handle avoidance outlets 52 include only one of the handle avoidance outlets 52L on one side and the handle avoidance outlet 52R on the other side.

[0057] By the way, it is thought that directing airflow towards the operator's head can easily provide a cooling sensation. Therefore, in this embodiment, as shown in Figure 5, the cab 12 includes a top wall 41T located above the side wall 41S2 and the front wall 41F, upper air outlets 61R and 61L provided on the top wall 41T, and a second duct 63 connecting the air conditioning unit 30 to the upper air outlets 61R and 61L. As a result, the cab 12 is equipped with one or more upper air outlets 61L, 61R located above the head of the operator seated in the operator's seat 21, and an upper duct 63 connecting the air conditioning unit 30 to the one or more upper air outlets 61L, 61R. Therefore, compared to a case where the cab 12 does not have an upper air outlet 61, the amount of air hitting the operator's head can be increased, improving the feeling of coolness.

[0058] Furthermore, in this embodiment, as shown in Figure 7, the cab body 40 includes an intermediate pillar body 45A provided on the other side in the width direction relative to the operator's seat 21, and the intermediate pillar body 45A is located between the front wall 41F and the rear wall 41R of the cab body 40 in the front-rear direction. Therefore, the strength of the cab 12 can be ensured compared to the case where the cab body 40 does not have an intermediate pillar body 45A.

[0059] Furthermore, in this embodiment, as shown in Figure 5, the second duct (upper duct 63) is provided such that at least a portion of it follows the pillar (intermediate pillar body 45A). Specifically, the upper duct 63 includes an upper and lower extension portion 63A that extends in the vertical direction. As shown in Figure 7, the upper and lower extension portion 63A of the upper duct 63 is provided along the intermediate pillar body 45A, and is located on the inside of the intermediate pillar body 45A in the width direction. Therefore, compared to the case where the vertically extending portion 63A of the upper duct 63 is provided at a different position in the front-rear direction from the intermediate pillar body 45A, visibility from the operator's seat 21 can be ensured.

[0060] Furthermore, in this embodiment, the pillar (intermediate pillar body 45A) is adjacent to the air conditioning unit 30 in the width direction when viewed from above. Therefore, in a top view, compared to the case where the pillar 45A is not adjacent to the air conditioning unit 30 in the width direction, the portion from the air conditioning unit 30 along the pillar 45A can be shortened, and the second duct (upper duct 63) can be shortened.

[0061] Furthermore, in this embodiment, as shown in Figure 8, the vertically extending portion 63A of the upper duct 63 includes an outer wall portion 63A1 extending in the front-rear direction from a position outside the width direction of the inner space of the vertically extending portion 63A, and an inner wall portion 63A2 extending in the front-rear direction from a position inside the width direction of the inner space. Here, the front-to-back dimension of the outer wall portion 63A1 is greater than the front-to-back dimension of the inner wall portion 63A2. Therefore, the cross-sectional shape of the vertically extending portion 63A of the upper duct 63 can be made into a trapezoidal shape that ensures visibility while also securing the cross-sectional area, taking into account the eye point of the operator seated in the operator's seat 21. Thus, visibility can be ensured while securing the duct cross-sectional area.

[0062] Furthermore, in this embodiment, as shown in Figures 5 and 10, the cab 10 includes an outside air duct 32, an outside air filter 33, and an outside air cover 34. The air conditioning unit 30 includes a blower motor 31.

[0063] By the way, the blower motor 31 in the air conditioning unit 30 requires periodic replacement. Therefore, in this embodiment, as shown in Figure 10, the side wall 41S2 has an opening from which the blower motor 31 can be removed, the outside air duct 32 is located between the blower motor 31 and the opening and guides the outside air flowing in from the opening to the blower motor 31, the outside air filter 33 is located at the inlet of the outside air duct 32 and the outside air cover 34 covers the opening. As a result, the cab 12 is configured to allow replacement of the blower motor 31 through an open section formed by removing the outside air cover 34, outside air filter 33, and outside air duct 32 from the outside of the cab 12. Therefore, since the blower motor 31 can be replaced from the outside of the cab 12, it is not necessary to perform the blower motor 31 replacement work inside the cab 12.

[0064] Incidentally, if the air conditioning unit 30 is positioned adjacent to the second side wall 41S2, which is located on the other side in the width direction opposite to the entrance / exit 42 relative to the operator's seat 21, it may become difficult for the worker to maintain their posture when servicing the air conditioning unit 30 inside the cab 12. Therefore, in this embodiment, as shown in Figure 9, the cab 12 is equipped with a posture-holding grip 49 fixed to the second side wall 41S2. Therefore, when the air conditioning unit 30 is positioned adjacent to the second side wall 41S2 located on the other side in the width direction, opposite to the entrance / exit 42 relative to the operator's seat 21, the maintainability of the air conditioning unit 30 inside the cab 12 can be improved. Maintenance of the air conditioning unit 30 inside the cab 12 refers to, for example, the replacement of the internal air filter 35 of the air conditioning unit 30.

[0065] While preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to those described above.

[0066] For example, in the above embodiment, the cab 12 is provided with one or more upper air outlets 61L, 61R located above the head of the operator seated in the operator's seat 21, but the disclosure is not limited thereto.

[0067] <Note> The following additional information is disclosed as a concept encompassing the configuration according to the above embodiment. (Additional note 1) Side walls and, A front wall located in front of the aforementioned side wall, An air conditioning unit is positioned adjacent to the aforementioned side wall, A front air outlet is positioned between the front wall and the air conditioning unit, A first duct connecting the aforementioned air conditioning unit and the aforementioned front air outlet, A cab for construction machinery equipped with this feature. (Additional note 2) The top wall located above the side wall and the front wall, The upper air outlet provided on the ceiling wall, A second duct connecting the aforementioned air conditioning unit and the aforementioned upper air outlet, Equipped with, The cab described in Appendix 1. (Additional note 3) The aforementioned side wall has a pillar extending in the vertical direction, The second duct is provided such that at least a portion of it follows the pillar. The cab described in Appendix 2. (Additional note 4) In a top view, the aforementioned pillar is adjacent to the air conditioning unit in the width direction. The cab described in Appendix 3. (Additional note 5) The first duct is, A first extending portion extending forward from the front of the air conditioning unit, It has a second extending portion that extends in the width direction and connects the front outlet and the first extending portion, A cab as specified in any one of the appendices 1 to 4. (Additional note 6) The second duct is, A third extending portion extending upward from the aforementioned air conditioning unit, A fourth extending portion that communicates with the third extending portion and extends in the front-rear direction, A fifth extending portion extends in the width direction and connects the fourth extending portion and the upper air outlet, Having, A cab as specified in any one of the appendices 2 to 4. (Additional note 7) The aforementioned side wall has a pillar extending in the vertical direction, The third extension portion is, The outer wall portion adjacent to the aforementioned pillar, An inner wall portion located inward in the width direction from the outer wall portion and facing the outer wall portion in the width direction, It has, The front-to-back dimension of the outer wall portion is larger than the front-to-back dimension of the inner wall portion. The cab described in Appendix 6. (Additional note 8) Equipped with a driver's seat, The aforementioned upper air outlet is located behind the driver's seat. A cab as specified in any one of the appendices 2 to 4. (Additional note 9) Equipped with a driver's seat, The aforementioned upper air outlet is provided on the outside in the width direction relative to the driver's seat. A cab as specified in any one of the appendices 2 to 4. (Additional note 10) outside air duct and An outside air filter, Outer cover and, Equipped with, The aforementioned air conditioning unit has a blower motor, The side wall has an opening from which the blower motor can be removed. The aforementioned outside air duct is located between the blower motor and the opening, and guides the outside air flowing in from the opening to the blower motor. The outside air filter is located at the inlet of the outside air duct, The outer air cover covers the opening, A cab as specified in any one of the appendices 1 to 9. (Additional note 11) A posture-holding grip fixed to the side wall. Equipped with, A cab as specified in any one of the appendices 1 to 10. (Additional note 12) The aforementioned front air outlet is, Handle-avoiding air outlets are positioned so that the airflow to the operator's head, while seated in the operator's seat, is not obstructed by the handle. including, A cab as specified in any one of the appendices 1 to 11. (Additional note 13) The aforementioned handle avoidance air outlet is One handle avoidance outlet is located on one side in the width direction of the aforementioned handle, A handle avoidance outlet located on the other side in the width direction from the aforementioned handle, including, The cab described in Appendix 12. (Additional note 14) A construction machine equipped with a cab as described in any one of the appendices 1 to 13. [Explanation of Symbols]

[0068] 12...Cab, 21...Operator's seat, 23...Steering wheel, 30...Air conditioning unit, 31...Blower motor, 32...Outside air duct, 33...Outside air filter, 34...Outside air cover, 35...Inside air filter, 40...Cab body, 41F...Front wall, 41R...Rear wall, 41S1...First side wall, 41S2...Second side wall, 42...Inlet / outlet, 45A...Intermediate pillar body, 49...Posture-holding grip, 51...Central first front air outlet Nozzle (front air outlet), 52...Outer first front air outlet (handle avoidance air outlet, front air outlet), 52L...Handle avoidance air outlet on one side (front air outlet), 52R...Handle avoidance air outlet on the other side (front air outlet), 53...First front air outlet (front air outlet), 56...First front duct (front duct), 61...Upper air outlet, 63...Upper duct, 63A...Upper and lower extension section, 63A1...Outer wall section, 63A2...Inner wall section

Claims

1. Side walls and, A front wall located in front of the aforementioned side wall, An air conditioning unit is positioned adjacent to the aforementioned side wall, A front air outlet is positioned between the front wall and the air conditioning unit, A first duct connecting the aforementioned air conditioning unit and the aforementioned front air outlet, A cab for construction machinery equipped with this feature.

2. The top wall located above the side wall and the front wall, The upper air outlet provided on the ceiling wall, A second duct connecting the aforementioned air conditioning unit and the aforementioned upper air outlet, Equipped with, The carburetor according to claim 1.

3. The aforementioned side wall has a pillar extending in the vertical direction, The second duct is provided such that at least a portion of it follows the pillar. The carburetor according to claim 2.

4. In a top view, the aforementioned pillar is adjacent to the air conditioning unit in the width direction. The carburetor according to claim 3.

5. The first duct is, A first extending portion extending forward from the front of the air conditioning unit, It has a second extending portion that extends in the width direction and connects the front outlet and the first extending portion, The carburetor according to claim 1.

6. The second duct is, A third extending portion extending upward from the aforementioned air conditioning unit, A fourth extending portion that communicates with the third extending portion and extends in the front-rear direction, A fifth extending portion extends in the width direction and connects the fourth extending portion and the upper air outlet, Having, The carburetor according to claim 2.

7. The aforementioned side wall has a pillar extending in the vertical direction, The third extension is, The outer wall portion adjacent to the aforementioned pillar, An inner wall portion located inward in the width direction from the outer wall portion and facing the outer wall portion in the width direction, It has, The front-to-back dimension of the outer wall portion is larger than the front-to-back dimension of the inner wall portion. The carburetor according to claim 6.

8. Equipped with a driver's seat, The aforementioned upper air outlet is located behind the driver's seat. The carburetor according to claim 2.

9. Equipped with a driver's seat, The aforementioned upper air outlet is provided on the outside in the width direction relative to the driver's seat. The carburetor according to claim 2.

10. outside air duct and An outside air filter, Outer cover and, Equipped with, The aforementioned air conditioning unit has a blower motor, The side wall has an opening from which the blower motor can be removed. The aforementioned outside air duct is located between the blower motor and the opening, and guides the outside air flowing in from the opening to the blower motor. The outside air filter is located at the inlet of the outside air duct, The outer air cover covers the opening, The carburetor according to claim 1.

11. A posture-holding grip fixed to the side wall. Equipped with, The carburetor according to claim 1.

12. The aforementioned front air outlet is, Handle-avoiding air outlets are positioned so that the airflow to the operator's head, while seated in the operator's seat, is not obstructed by the handle. including, The carburetor according to claim 1.

13. The aforementioned handle avoidance air outlet is One handle avoidance outlet is located on one side in the width direction of the aforementioned handle, A handle avoidance outlet located on the other side in the width direction from the aforementioned handle, including, The carburetor according to claim 12.

14. A construction machine comprising the cab described in claim 1.

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