JP4291221B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine that is suitably used as, for example, a hydraulic excavator, a hydraulic crane, a wheel loader, and the like and includes an air conditioning unit.

  Generally, a construction machine is known in which an air conditioner (air conditioner) is mounted on a vehicle body, and conditioned air such as cold air and warm air is supplied around the driver's seat by this air conditioner (for example, Patent Documents 1 and 2).

JP 2001-171328 A JP 2002-121769 A

  This type of conventional construction machine has a self-propelled vehicle body provided with a work device, and a driver's seat on which an operator is seated is disposed in a cab of the vehicle body. A floor board on which an operator puts his / her foot is provided below the driver's seat, and an air conditioning unit constituting an indoor unit of the air conditioner is disposed on the floor board. For example, this air conditioning unit is a unit in which a blower fan, an evaporator, a heater core, and the like are integrated, and constitutes an air conditioner together with an outdoor unit such as a compressor and a condenser attached to the engine side of the vehicle.

  Here, when the air conditioning unit is operated, moisture in the air condenses at a low temperature part such as an evaporator, and water droplets or the like are easily generated. For this reason, in the conventional technology, a drain hose is connected to the air conditioning unit, and the drain hose extends outside through the floor of the cab, so that moisture condensed in the air conditioning unit is discharged to the outside by the drain hose. (See, for example, Patent Document 3).

Japanese Utility Model Publication No. 7-37730

  Moreover, in a construction machine, for example, when working on an inclined land, the vehicle body may be tilted. For this reason, in the prior art, by providing drain outlets at a plurality of locations of the air conditioning unit and connecting drain hoses to these outlets, drain can be discharged from any outlet even when the vehicle body is tilted. There is a configuration.

  By the way, in the prior art mentioned above, it is set as the structure which provides the outflow port of several places in an air conditioning unit, and connects a drain hose to these outflow ports, respectively. However, when assembling the construction machine, drain hoses must be connected to each outlet of the air conditioning unit, and these hoses must be inserted and fixed to the floor of the cab, etc. It is necessary to perform the fixing work for the number of outlets.

  For this reason, in the prior art, there is a problem that the assembling work related to the air conditioning unit takes time and productivity is lowered. Further, since the number of drain hose connections increases according to the number of outlets, for example, forgetting to attach the hose or dropping off after the assembly is likely to occur, and there is a possibility that the drain leaks into the cab.

  Furthermore, since the number of parts such as drain hoses increases and the structure of the entire air conditioning unit including the hose is likely to be complicated, it is difficult to arrange the air conditioning unit in a limited space in the cab, for example, in a small construction machine. There is also a problem of becoming.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to reduce the number of components such as a drain hose and to simplify the structure of the entire air conditioning unit, and to perform assembly work efficiently. At the same time, it is to provide a construction machine capable of improving productivity and reliability.

  In order to solve the above-described problems, the present invention provides a self-propelled vehicle body provided with a working device, a driver seat provided on the vehicle body, on which an operator is seated, and a driver seat provided on the front side of the driver seat. The present invention is applied to a construction machine including a floor board on which a seated operator puts his / her foot.

A feature of the configuration adopted by the invention of claim 1 is that a floor plate is provided with a tray having a recessed portion recessed downward, and the tray is provided with a plurality of outlets for supplying conditioned air and for discharging the drain. It is configured to accommodate the air conditioning unit provided, and a lower number of hose connection ports than the outflow port of the air conditioning unit are provided on the bottom side of the tray, and the hose connection port flows out from the outflow port of the air conditioning unit. in that a configuration to connect a drain hose for draining to the outside of.

  According to the second aspect of the present invention, the floor board is provided with an opening at a portion where an operator puts his / her foot, and the tray is attached to the opening.

Further, according to the invention of claim 3, the bottom side of the tray, the inclined surface that is inclined obliquely downward to support the air conditioning unit is provided, and a structure in which Ru is provided a hose connection port to the lower side of the inclined surface portion.

  Furthermore, according to the invention of claim 4, the floor board and the driver seat base that supports the driver seat are integrally configured as a floor base.

According to invention of Claim 1, a tray can be arrange | positioned on the floor board of a driver's seat, and an air-conditioning unit can be accommodated in the recessed part. When moisture (drainage) such as condensed water flows out from the outlet of the air conditioning unit, the drain can be received by the tray, and the drain in the tray can be discharged to an appropriate external position by the drain hose. . Moreover, it was set as the structure which provides a smaller number of hose connection ports than the outflow port of an air conditioning unit in the bottom part side of a tray. As a result, for example, even if drain outlets are provided at a plurality of locations of the air conditioning unit according to the specifications of the construction machine, the tray has a constant number of drain hoses smaller than the outlet regardless of the number of outlets. the since it Re connect the hose connecting port, it is possible to reduce the number of parts such as a drain hose.

Also, when assembling construction machinery, it is only necessary to attach the drain hose to the hose connection port of the tray, and it is not necessary to insert multiple hoses through the floor board etc. to attach to the air conditioning unit. The structure of the floor and the structure of the floor board can be simplified, and operations related to the connection and routing of the hose can be performed efficiently. And even if it is a small construction machine etc., an air-conditioning unit etc. can be arranged compactly in a narrow space.

  In addition, since the number of drain hoses can be reduced and the number of hose connections can be kept to the minimum necessary, the connection status can be easily managed, and drain leakage due to forgetting or dropping off of the hoses can be reliably prevented. can do. For example, when exchanging the drain hose or the like, the hose can be easily attached and detached by removing the tray from the floor plate and lifting it. Furthermore, even if the specifications such as the shape of the air conditioning unit and the number of outlets are changed, or when an air conditioning unit with a different specification is installed in the vehicle, there is no need to change the shape and number of parts of the tray and drain hose. These can be used as common parts. Thus, by using a tray and a drain hose, productivity and reliability can be improved, and maintainability at the time of hose exchange etc. can be improved.

  According to the invention of claim 2, the tray can be attached to the opening of the floor board, and the air conditioning unit can be accommodated on the lower side of the floor board by this tray. Thereby, even if it is a small construction machine etc., for example, an air-conditioning unit can be arranged compactly in the limited space in a cab, and the space in a cab can be used effectively.

According to the invention of claim 3, even when drain flows out from the air conditioning unit with respect to the inclined surface portion of the tray, this drain can be collected along the inclined surface portion at the hose connection port . Thereby, the drain in a tray can be efficiently discharged | emitted from the drain hose connected to the hose connection port, and it can prevent reliably that a drain accumulates in a tray.

  Furthermore, according to the invention of claim 4, since the floor plate on which the tray is arranged and the driver seat base that supports the driver's seat can be integrally configured as a floor base, the floor plate and the driver seat can be used when assembling the construction machine. The pedestal can be handled as a floor base in a sub-assembled state, and the number of parts during assembly can be reduced to improve workability.

  Hereinafter, as a construction machine applied to an embodiment of the present invention, a small hydraulic excavator will be described as an example and described in detail with reference to the accompanying drawings.

  In the figure, reference numeral 1 denotes a small excavator. The excavator 1 is mounted on a self-propelled lower traveling body 2 and on the lower traveling body 2 so as to be able to turn, and constitutes a vehicle body together with the lower traveling body 2. The upper swing body 3 and a work device 4 that is provided on the front side of the upper swing body 3 so as to be able to move up and down and perform excavation work of soil and the like are roughly constituted.

  The upper swing body 3 includes a swing frame 5 formed as a support structure, an exterior cover 6 that covers devices such as an engine and a hydraulic pump (none of which are shown) mounted on the swing frame 5, A counterweight 7 attached to the rear end of the swivel frame 5, a cab 11, a floor base 12, a driver seat 17, a tray 20, a drain hose 34, an air conditioning unit 36, a duct, which will be described later, provided on the left side of the swivel frame 5. 37, a floor board cover 39, and the like.

  A cab 11 is provided on the left side of the revolving frame 5, and the cab 11 covers the periphery of the driver's seat 17, thereby defining a driver's cab where an operator performs various operations. As shown in FIGS. 1 and 2, the cab 11 is formed in a box shape by, for example, the front surface portion 11A, the rear surface portion 11B, the left side surface portion 11C, the right side surface portion 11D, and the ceiling surface portion 11E. A floor base 12 is provided.

  Further, the front side of the cab 11 is rotatably connected to the revolving frame 5, and the rear side is connected to the revolving frame 5 so as to be attached to and detached from the revolving frame 5. For example, when performing maintenance work on the vehicle, as shown by a virtual line in FIG. 1, the rear side is turned upward (tilted) with the front side of the cab 11 as a fulcrum, so that the equipment such as the engine is It can be exposed.

  Reference numeral 12 denotes a floor base provided on the lower side of the cab 11, and the floor base 12 is integrally formed by welding, for example, a plurality of steel plates, steel materials, etc. As shown in FIGS. 13, a driver seat base 15, a building mounting plate 16, and the like.

  Reference numeral 13 denotes a floor board that constitutes the front side of the floor base 12, and the floor board 13 is used by an operator who sits on the driver's seat 17 to put his / her foot on the floor board cover 39 described later. As shown in FIGS. 3 and 4, the floor plate 13 is formed of, for example, a plate material that extends in the horizontal direction and is provided on the front side of the driver's seat 17. The front side of the floor plate 13 is a lever / pedal mounting plate 13A to which a travel lever / pedal 19 and the like to be described later are attached. The lever / pedal mounting plate 13A is attached to the front side of the revolving frame 5. Yes.

  Further, as shown in FIGS. 5 to 7, the floor plate 13 is provided with a substantially rectangular tray opening 14 at a position on the rear side of the lever / pedal mounting plate 13 </ b> A where an operator can put his / her foot. A tray 20 described later is fitted in the tray opening 14.

  Reference numeral 15 denotes a substantially box-shaped driver's seat pedestal fixedly provided on the rear side of the floor plate 13, and the driver's seat pedestal 15 is attached to the revolving frame 5 at a position where the rear lower side of the cab 11 is closed. 17 is supported. In addition, a building attachment plate 16 to which, for example, a part of the cab 11 is attached is integrally provided on the rear side of the driver seat base 15.

  A driver's seat 17 is provided in the cab 11 and provided on the driver's seat pedestal 15, and the operator's seat 17 is seated by an operator. As shown, an operation lever 18 for operating the work device 4 is provided. Further, on the front side of the driver's seat 17, a traveling lever / pedal 19 for traveling the lower traveling body 2 is provided.

  Reference numeral 20 denotes a tray provided in the tray opening 14 of the floor board 13. The tray 20 accommodates an air conditioning unit 36 and a duct 37 (described later) between the floor board cover 39 as shown in FIGS. 8 and 9. In addition, the water (drain) flowing out from the air conditioning unit 36 is received.

  Here, the tray 20 is formed, for example, as a box-like body with a bottom that is recessed downward, and opens upward. The tray 20 is fitted into the tray opening 14 of the floor plate 13 to close the tray opening 14, so that the air conditioning unit 36 and the duct 37 are positioned substantially below the floor plate 13. While accommodated, it is detachably attached to the floor board 13 by means such as screwing.

  Further, as shown in FIG. 7, the tray 20 includes a unit side bottom surface portion 21, a duct side bottom surface portion 22, a front surface portion 24, a rear surface portion 25, a left side surface portion 26, a right side surface portion 27, and flanges 29, 30, 31, 32. , Hose connection port 33 and the like.

  Reference numeral 21 denotes a unit-side bottom surface portion that forms the bottom of the tray 20 together with the duct-side bottom surface portion 22 and the like. The unit-side bottom surface portion 21 is formed in, for example, a substantially rectangular flat plate shape, and is disposed at a position recessed downward from the floor plate 13. The air conditioning unit 36 is supported from below.

  Further, as shown in FIG. 9, the unit-side bottom surface portion 21 is an inclined surface portion that is inclined obliquely downward, for example, from the rear side to the front side and has an inclination angle θ with respect to the horizontal direction. Thereby, the drain which flows out from the air-conditioning unit 36 can be collected on the front part side (lower part side) of the unit side bottom face part 21 by its own weight, and the drain is smoothly made from a hose connection port 33 which will be described later provided in this part. Can be discharged.

  22 is a duct-side bottom surface portion that is positioned on the bottom side of the tray 20 and supports a duct 37 described later. The duct-side bottom surface portion 22 is connected to, for example, the right end of the unit-side bottom surface portion 21 as shown in FIG. It extends substantially horizontally at a position above the unit-side bottom surface portion 21 and is disposed at a position recessed downward from the floor plate 13. And between the unit side bottom face part 21 and the duct side bottom face part 22, the step part 23 extended in the up and down direction is formed.

  Reference numeral 24 denotes a front surface portion constituting the front side of the tray 20, and the front surface portion 24 is erected on the front end of the unit side bottom surface portion 21 as shown in FIG. Further, a rear surface portion 25 is erected at the rear end of the unit side bottom surface portion 21, and a left side surface portion 26 is erected at the left end. Further, a right side surface portion 27 is erected on the right end of the duct side bottom surface portion 22.

  The front surface portion 24, the rear surface portion 25, the left side surface portion 26, and the step portion 23 are disposed so as to surround the unit side bottom surface portion 21 from four sides, and are bottomed with a dish-like shape together with the unit side bottom surface portion 21. The recessed portion 28 is formed. The recessed portion 28 serves as a tray for accommodating the drain of the air conditioning unit 36 without leaking to the surroundings.

  Reference numeral 29 denotes a front flange 29 provided at the upper end of the front surface portion 24, and the front flange 29 projects substantially horizontally from the front surface portion 24 toward the outside of the tray 20. Further, a rear flange 30, a left flange 31, and a right flange 32 that protrude outward are provided on the rear surface portion 25, the left side surface portion 26, and the right side surface portion 27 of the tray 20 in substantially the same manner as the front surface portion 24. These flanges 29, 30, 31, and 32 abut against the upper surface of the floor plate 13 at a position that surrounds the tray opening 14 when the tray 20 is fitted into the tray opening 14 of the floor plate 13. The left flange 31 and the right flange 32 are screwed to the floor plate 13 as shown in FIG.

Reference numeral 33 denotes a hose connection port provided on the lower side (front side) of the unit-side bottom surface portion 21. The hose connection port 33 is provided in, for example, two places as a number smaller than an outlet 36F of the air conditioning unit 36 described later. It has been. As shown in FIGS. 7 and 9 , each hose connection port 33 is a portion to which a drain hose 34 described later is connected, and is open to the recessed portion 28 with a space in the left and right directions.

  Reference numeral 34 denotes, for example, two drain hoses each having a proximal end connected to each hose connection port 33 of the tray 20. Each drain hose 34 is composed of, for example, a flexible hose, and the distal end side thereof is connected to the cab. 11 is fixed at an appropriate position for discharging the drain.

  And the drain hose 34 guides the drain which flows in into the tray 20 from each outflow port 36F of the air-conditioning unit 36 to the exterior of the cab 11, and discharges this to an appropriate position. Therefore, even if a large number of outlets 36F are provided in the air conditioning unit 36, for example, the drainage can be performed with only two drain hoses 34, for example. Reference numeral 35 denotes a plurality of mounting screws for mounting the left flange 31 and the right flange 32 of the tray 20 to the floor board 13.

  36 is an air conditioning unit which is located below the floor cover 39 and is accommodated in the tray 20. The air conditioning unit 36 constitutes an indoor unit of an air conditioner mounted on the hydraulic excavator 1, and is on the engine side. An air conditioner is configured together with an outdoor unit such as a compressor and a condenser (both not shown) attached to the air conditioner. Here, as shown in FIG. 8, the air conditioning unit 36 is formed in a single box shape.

  The air conditioning unit 36 includes a substantially box-shaped main body case 36A placed on the unit-side bottom surface portion 21 of the tray 20, a blower fan 36B provided on the left side of the main body case 36A, and the blower fan 36B. An evaporator 36C provided in the main body case 36A, a heater core 36D provided on the downstream side of the evaporator 36C, and an air outlet 36E provided on the right side of the main body case 36A for supplying conditioned air. And, for example, four outlets 36F (see FIG. 7) for draining the drain generated in the main body case 36A.

  The air conditioning unit 36 sucks air into the main body case 36A by rotating the blower fan 36B, cools the air with the evaporator 36C, or warms it with the heater core 36D, and then blows the conditioned air. The air is blown into a duct 37 to be described later from the opening 36E.

  The drain outlets 36F are provided, for example, at the four corners of the main body case 36A, that is, at the left and right sides of the front portion and at the left and right sides of the rear portion. For this reason, for example, even if the vehicle body is inclined in any direction on an inclined ground or the like, the drain in the air conditioning unit 36 is recessed from the outlet 36F on the lower side in the inclined state of each outlet 36F. The drain can be discharged into the recess 28, and the drain can be discharged to the outside by the drain hose 34.

  37 is a duct attached to the air conditioning unit 36. As shown in FIG. 8, the duct 37 has one end connected to the air outlet 36E of the air conditioning unit 36 and is accommodated in the tray 20 together with the air conditioning unit 36. It is placed on the duct side bottom surface portion 22. Further, as shown in FIG. 3, the other end side of the duct 37 extends to the inside of a duct cover 38 provided on the floor board 13 on the right front side of the driver's seat 17, and has, for example, three places provided on the duct cover 38. The air outlet 38A is connected using another duct (not shown) or the like.

  The duct 37 blows conditioned air from the air blowing port 36 </ b> E of the air conditioning unit 36 toward each air outlet 38 </ b> A of the duct cover 38. Thereby, when the air conditioning unit 36 is operated, the conditioned air is blown into the cab 11 from each outlet 38A.

  In FIG. 3, reference numeral 39 denotes a floor board cover which covers the tray 20, the air conditioning unit 36, the duct 37 and the like from above. The floor board cover 39 is detachably provided on the floor board 13 together with a floor mat (not shown). ing. Here, the floor board cover 39 is formed at a height slightly protruding from the floor board 13 by configuring the air conditioning unit 36 as thin as possible. And the floor board cover 39 forms the flat floor surface without an unevenness | corrugation so that the operator who seated on the driver's seat 17 may put a foot easily.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. Next, its assembly and operation will be described.

  First, when assembling the hydraulic excavator 1, the drain hose 34 is connected to each hose connection port 33 of the tray 20, and these are fitted into the tray opening 14 of the floor plate 13, and the tray 20 is screwed to the floor plate 13. . Next, the air conditioning unit 36 and the duct 37 are accommodated in the tray 20, and the floor plate cover 39 is disposed on the upper side of the tray 20, whereby the air conditioning unit 36, the drain hose 34, and the like can be assembled.

  When the hydraulic excavator 1 is operated, an operator seated on the driver's seat 17 operates the operation lever 18, the travel lever / pedal 19, and the like. As a result, the operator can run the vehicle body or turn the upper swing body 3 and can also perform the excavation work of earth and sand by operating the work device 4.

  Further, when the operator switches on the air conditioner, conditioned air in which cold air and warm air are harmonized is generated by the evaporator 36C and the heater core 36D of the air conditioning unit 36, and this conditioned air passes through the duct 37 and the like. Since the air is blown into the cab 11 from the air outlets 38A of the duct cover 38, the inside of the cab 11 can be adjusted to an appropriate temperature.

  Further, when the air conditioning unit 36 is operated, moisture in the air condenses at a low temperature portion such as the evaporator 36C and becomes a drain in the main body case 36A. This drain flows out of any of the four outlets 36F into the recessed recess 28 of the tray 36 according to, for example, the inclination of the vehicle body, and the hose connection port 33 extends along the inclined unit-side bottom surface 21. Since the air is collected at the position, the drain of the air conditioning unit 36 can be smoothly discharged from the drain hose 34.

  Thus, in the present embodiment, the tray opening portion 14 of the floor board 13 is provided with the tray 20 that houses the air conditioning unit 36, and the tray 20 is provided with, for example, two drain hoses 34. 20 allows the air conditioning unit 36 and the duct 37 to be accommodated substantially below the floor plate 13. Thereby, even if it is small hydraulic excavator 1 etc., for example, the air-conditioning unit 36 and the duct 37 can be arrange | positioned compactly in the limited space in the cab 11, and the space in the cab 11 can be utilized effectively. .

  When the drain flows out from the air conditioning unit 36, the drain can be received by the recessed portion 28 of the tray 20, and the drain in the tray can be discharged to an appropriate external position by the drain hose 34.

  Thereby, for example, even when the air conditioning unit 36 having four outlets 36F is used, the drain 20 can be provided with a certain number of drain hoses 34 on the tray 20 regardless of the number of outlets 36F. The number of parts such as 34 can be reduced.

  Further, when the hydraulic excavator 1 is assembled, for example, a troublesome operation of inserting a plurality of hoses through the floor plate 13 and connecting them to the outlets 36F of the air conditioning unit 36 becomes unnecessary. Since it only needs to be attached to the connection port 33 from the outside, the structure of the entire air conditioning unit 36 including the drain hose 34 and the structure of the floor board 13 can be simplified, and work related to connection and routing of the hose can be performed efficiently. Can do. And even if it is a small hydraulic excavator 1 etc., the drain hose 34, the air-conditioning unit 36, etc. can be arrange | positioned compactly in the limited space.

  In addition, since the number of drain hoses 34 can be reduced and the number of hose connections can be kept to a minimum, it becomes easier to manage the connection state, and drainage due to forgetting hose assembly or dropping off after assembly, etc. Leakage can be reliably prevented.

  For example, when exchanging the drain hose 34 or the like, the attaching screw 35 is loosened, and the tray 20 is detached from the floor plate 13 and lifted, whereby the hose can be easily attached and detached. Further, for example, even when the specifications such as the shape of the air conditioning unit 36 and the number of outlets 36F are changed, or when the air conditioning unit 36 having a different specification is mounted on the vehicle, the shape and number of components of the tray 20 and the drain hose 34 are changed. They do not need to be changed and can be used as common parts.

  Thus, by using the tray 20 that can be attached to and detached from the floor board 13 and the drain hose 34 connected to the tray 20, productivity and reliability can be improved, and when the hose is replaced, etc. Maintenance can be improved.

  Further, the tray 20 is provided with a unit-side bottom surface portion 21 that is inclined obliquely downward from, for example, the rear side toward the front side, and a hose connection port 33 is provided on the front side of the unit-side bottom surface portion 21. For example, even if drain flows out from any outlet 36F of the air conditioning unit 36 to the unit-side bottom surface portion 21 according to the inclination of the vehicle body, the drain is collected along the unit-side bottom surface portion 21 at the position of the hose connection port 33. be able to. Thereby, the drain in the tray 20 can be efficiently discharged from the drain hose 34, and the drain can be reliably prevented from accumulating in the tray.

  Furthermore, since the tray 20 is provided with the duct side bottom surface portion 22, the air conditioning unit 36 and the duct 37 for blowing the conditioned air can be accommodated together in the tray 20, and these can be compactly mounted on the lower side of the floor plate 13. Can be arranged.

  On the other hand, the floor plate 13 on which the tray 20 is disposed, the driver seat base 15 that supports the driver seat 17, and the building mounting plate 16 to which the cab 11 is attached are integrally configured as the floor base 12, so that the assembly work of the hydraulic excavator 1 can be performed. When performing, the floor plate 13, the driver seat base 15 and the building mounting plate 16 can be handled as the floor base 12 in a sub-assembled state, and the number of parts at the time of assembly can be reduced to improve workability.

  In the embodiment, the two drain hoses 34 are connected to the tray 20. However, the present invention is not limited to this, and for example, one drain hose may be connected to the tray, or three or more drain hoses may be connected.

  Moreover, in embodiment, the case where the floor board 13, the driver's seat base 15, and the building attachment board 16 were comprised integrally as the floor base 12 was mentioned as an example, and was described. However, the present invention is not limited to this, and one or two of these three parts and the remaining parts may be separately formed and assembled, and each of the three parts may be assembled. You may comprise separately.

  In the embodiment, a small hydraulic excavator is taken as an example of the construction machine. However, the present invention is not limited to this, and can be applied to various construction machines including, for example, medium- and large-sized hydraulic excavators, hydraulic cranes, wheel loaders, and the like.

It is a front view which shows the hydraulic excavator applied to embodiment of this invention. It is a perspective view which shows the inside of the cab of a hydraulic shovel. It is a perspective view which shows the driver's seat in a cab, a floor board, etc. It is a perspective view which shows the air-conditioning unit etc. in FIG. 3 in the state which removed the floor-plate cover. It is a perspective view which shows a floor base alone. It is a disassembled perspective view in the state which removed the tray, the air conditioning unit, etc. from the floor base. It is a disassembled perspective view which expands and shows the principal part in FIG. It is sectional drawing which looked at the tray etc. from the arrow VIII-VIII direction in FIG. It is sectional drawing which looked at the tray etc. from the arrow IX-IX direction in FIG.

Explanation of symbols

1 Hydraulic excavator (Construction machinery)
2 Lower traveling body (car body)
3 Upper swing body (car body)
4 Working device 11 Cab 12 Floor base 13 Floor plate 14 Tray opening (opening)
15 Driver seat base 17 Driver seat 20 Tray 21 Unit side bottom surface (inclined surface)
22 Duct side bottom surface 23 Stepped portion 24 Front surface portion 25 Rear surface portion 26 Left side surface portion 27 Right side surface portion 28 Recessed recessed portion 29, 30, 31, 32 Flange 33 Hose connection port 34 Drain hose 36 Air conditioning unit 37 Duct

Claims (4)

A self-propelled vehicle body provided with a working device; a driver seat provided on the vehicle body on which an operator is seated; and a floor board provided on the front side of the driver seat and on which the operator seated on the driver seat rests. In the construction machine
The floor plate is provided with a tray having a recessed portion recessed downward, and the tray is configured to accommodate an air conditioning unit having a plurality of outlets for supplying conditioned air and flowing out the drain ,
On the bottom side of the tray, a smaller number of hose connection ports than the outlet of the air conditioning unit are provided,
The the hose connecting port, construction machine, characterized in that a configuration to connect a drain hose for discharging drain water flowing out from the outlet of the air conditioning unit to the outside.   The construction machine according to claim 1, wherein the floor board is provided with an opening at a portion where an operator puts a foot, and the tray is attached to the opening. On the bottom side of the tray, the inclined surface portion which is inclined obliquely downward with the air conditioning unit supports provided, according to claim 1 or 2 comprising as the Ru provided a hose connection port configured to the lower side of the inclined surface portion Construction machinery.   The construction machine according to claim 1, 2, or 3, wherein the floor board and a driver seat base that supports the driver seat are integrally configured as a floor base.

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