JP2007198057A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance heating efficiency by sucking warm air in an air conditioner. <P>SOLUTION: A toilet installing opening 13 is arranged in a foot placing part 12 positioned on the front side of an operation seat 16 among a floor member 11, and a toilet 19 storing a heater device 32 is installed in this toilet installing opening 13, and the toilet 19 is provided with a suction port 31 for sucking air in a machine room A when operating the heater device 32. Thus, when operating the heater device 32, air in the machine room A warmed by an engine 5 and a control valve unit 6 is sucked in a body case 32A via an outside air intake port 32D from the suction port 31. Thus, the air warmed in advance in the machine room A is further warmed by a heater core 32C, and thereby, heating efficiency by the heater device 32 can be enhanced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

  In general, as a construction machine, an upper swing body is turnably mounted on a self-propelled lower traveling body, and a driver's seat and an air conditioner such as a heater are mounted on the upper swing body. A device that supplies warm air or the like around a seat is known (for example, see Patent Document 1).

JP 2002-121771 A

  In this type of conventional construction machine, a floor member on which an operator puts his / her foot is provided below the driver's seat, and an air conditioner composed of a heater or the like is disposed on the floor member. The air conditioner has a configuration in which air around the driver's seat is sucked from an outside air inlet that is opened on the floor member, and conditioned air that has been heat-exchanged is blown out from an air outlet that is opened to the operator's feet through a duct.

  By the way, in the above-described prior art, since the outside air inlet of the air conditioner is opened on the floor member, the air conditioner performs heat exchange by sucking air on the floor member. However, when the air conditioner is used for heating, for example, when the air conditioner is started, the air on the floor member is at a low temperature, so the temperature of the warm air discharged from the air conditioner also decreases, and the heating efficiency is reduced. Lower. Particularly, in the case of a hydraulic excavator or the like equipped with a canopy, the driver's seat is open to the outside, so that the air conditioner always inhales cold outside air. For this reason, there is a problem that the heating efficiency of the air conditioner is low and the warm air cannot be sufficiently warmed.

  In a construction machine with the driver's seat open to the outside, the upper side of the floor member is exposed to wind and rain. Further, the upper side of the floor member on which the operator gets on and off may be washed with water. At this time, in the conventional construction machine, there is a possibility that water droplets or the like may enter from the outside air intake of the air conditioner, and the durability and reliability of the air conditioner tend to be lowered.

  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 provide a construction machine that can improve heating efficiency and improve durability by sucking warm air from an air conditioner. There is.

  In order to solve the above-described problems, the present invention provides a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and an operation provided on the upper revolving body so as to be able to be raised and lowered. The upper revolving structure includes a revolving frame formed as a support structure, an engine serving as a power source mounted on the rear side of the revolving frame, and a front side of the engine. A driver seat that is placed on the swivel frame and on which an operator sits, a floor member that is provided with a footrest portion that is positioned in front of the driver seat, and a footrest portion that is provided on the footrest portion of the floor member and sucks outside air into the driver seat The present invention is applied to a construction machine configured by an air conditioner that supplies conditioned air to a seated operator.

  A feature of the structure adopted by the invention of claim 1 is that a machine seat in which the engine and hydraulic equipment are accommodated in the footrest portion of the floor member is provided with a tray that accommodates the air conditioner. The present invention has a configuration in which an intake port for taking in indoor air is provided.

  According to a second aspect of the present invention, the air conditioner is a heater device that supplies warm air, and is configured to suck air warmed by the engine or hydraulic equipment from an air inlet provided in the tray.

  In the invention of claim 3, the driver's seat is configured to be covered with a canopy specification building.

  In the invention of claim 4, the intake port provided in the tray is provided at a position corresponding to the outside air intake port of the air conditioner.

  In the invention of claim 5, the tray mounting opening is provided in the footrest portion of the floor member, and the tray is attached to the tray mounting opening in a state of being recessed downward.

  In the invention of claim 6, the upper surface side of the air conditioner is configured to be covered with a metal or resin cover.

  According to the first aspect of the present invention, since the footrest portion of the floor member is provided with the tray for accommodating the air conditioner, and the tray is provided with the intake port, the air conditioner accommodates the engine and the hydraulic equipment through the intake port. The air in the machine room can be sucked. Thus, since the air conditioner sucks air warmed by the engine or hydraulic equipment and discharges conditioned air, when the air conditioner is used for heating, the temperature of the conditioned air can be increased and the heating efficiency of the air conditioner can be increased. Can be improved. Further, since the tray is provided in the footrest portion of the floor member, the tray can be disposed in a state of being recessed below the footrest portion of the floor member. For this reason, since the intake port of the tray can be arranged below the floor member (the turning frame side), for example, even when rainwater or the like hits from the upper side of the floor member, water droplets do not enter from the intake port. . As a result, the reliability and durability of the air conditioner can be improved as compared with the case where outside air is introduced from the upper side of the floor member.

  According to the invention of claim 2, since the air conditioner is a heater device that supplies warm air, the heater device can exchange heat with air warmed by the engine or hydraulic equipment, and has a high temperature. Conditioned air (warm air) can be supplied to the operator.

  According to the invention of claim 3, since the driver's seat is covered with a canopy specification building, the upper side of the floor member is opened to the outside air. At this time, since the tray is provided with an intake port for taking in air in the machine room in which the engine and hydraulic equipment are housed, the air conditioner does not draw in cold outside air, and the air heated by the engine or the like through the intake port. Can be inhaled. For this reason, the heating efficiency of an air conditioner can be improved. Further, in a configuration in which the driver's seat is covered with a canopy specification building, the upper side of the floor member is exposed to wind and rain. On the other hand, since the tray can be arranged in a state of being recessed below the footrest portion of the floor member, the air inlet of the tray can be arranged below the floor member (swivel frame side). . For this reason, even when rainwater or the like hits from the upper side of the floor member, water droplets do not enter from the air inlet, and the reliability and durability of the air conditioner can be improved.

  According to the fourth aspect of the present invention, since the air inlet provided in the tray is provided at a position corresponding to the outside air intake of the air conditioner, air conditioning is performed by shortening the interval between the air inlet of the tray and the outside air inlet of the air conditioner. The intake efficiency of the device can be increased.

  According to the invention of claim 5, the tray mounting opening is provided in the footrest portion of the floor member, and the tray is attached to the tray mounting opening in a state of being recessed downward. The floor member can be protruded below the footrest portion, and the intake port can be opened below the floor member. At this time, a space can be defined between the turning frame and the floor member, and the space can be communicated with the machine room. For this reason, since the air in the machine room can be supplied to the air conditioner in the tray through the intake port, the air conditioner can exchange heat with the air warmed by the engine, and the heating efficiency can be improved. Can be increased. Further, since the floor member and the tray can be manufactured separately, even when the floor member has a complicated shape, it can be manufactured easily, and the degree of freedom in design can be increased and the productivity can be increased. Furthermore, for example, in a state where the air conditioner is previously accommodated in the tray, the tray can be attached to the tray attachment opening of the floor member together with the air conditioner, and the workability can be improved by reducing the number of parts at the time of assembly.

  According to the sixth aspect of the present invention, since the upper surface side of the air conditioner is covered with the cover, even if the upper side of the floor member is opened, for example, as in the canopy specification, water drops from the upper side of the air conditioner And the like can be prevented from entering. For this reason, durability and reliability of an air conditioner can be improved.

  Hereinafter, as a construction machine according to an embodiment of the present invention, a small turning type hydraulic excavator provided with an offset type working device will be described as an example, and will be described in detail with reference to FIGS.

  In the figure, reference numeral 1 denotes a cantilever-type small swing excavator. The hydraulic excavator 1 is a self-propelled crawler-type lower traveling body 2 and an upper revolving body mounted on the lower traveling body 2 so as to be capable of pivoting. 3, and an offset working device 10 described later is provided on the front side of the upper swing body 3.

  The upper revolving unit 3 is disposed below the revolving frame 4 formed as a support structure, the engine 5 serving as a power source placed on the rear side of the revolving frame 4, and the air conditioning unit 18 described later. A control valve unit 6 as a hydraulic device provided; a floor member 11 (described later) having a driver seat 16 (described later) mounted on the revolving frame 4 and positioned on the front side of the engine 5; Counterweight that balances the weight of the canopy 7 that covers the outer frame 8, the outer cover 8 that covers the engine 5, the control valve unit 6, and the like mounted on the revolving frame 4, and the work device 10 that is provided at the rear end of the revolving frame 4. 9 is roughly constituted.

  Here, the upper turning body 3 is formed in a substantially circular shape when viewed from above so that it can turn substantially within the vehicle width of the lower traveling body 2. The counterweight 9 forms substantially the same surface as the exterior cover 8, and the counterweight 9 and the exterior cover 8 define a machine room A that houses the engine 5, the control valve unit 6 and the like. A extends to below the air conditioning unit 18 described later (see FIG. 2).

  The control valve unit 6 is composed of an assembly of multiple control valves (multiple valves) for controlling the supply and discharge of pressure oil to and from the hydraulic actuator mounted on the hydraulic excavator 1, and includes a hydraulic pump, hydraulic piping, etc. (Not shown) and hydraulic equipment. And the control valve unit 6 becomes high temperature when the heated return oil from a hydraulic actuator distribute | circulates. For this reason, when the hydraulic excavator 1 is operated, hydraulic equipment including the control valve unit 6, hydraulic pump, hydraulic piping (not shown), the engine 5 and the like serve as heat sources, and the temperature in the machine room A that accommodates them. Is always high.

  Reference numeral 10 denotes an offset working device provided to extend from the right side of the driver's seat 16 to the front side of the upper swing body 3. The working device 10 includes a lower boom 10A whose base end side is attached to the revolving frame 4 so as to be able to move up and down, an upper boom 10B attached to the distal end side of the lower boom 10A so as to swing left and right, and the upper boom 10B. Arm support member 10C attached to the front end side of the arm support member so as to be swingable in the left and right directions, an arm 10D attached to the front end side of the arm support member 10C so as to be rotatable, and turned to the front end side of the arm 10D. The bucket 10E is movably mounted, a link 10F that connects the lower boom 10A and the arm support member 10C, a boom cylinder 10G, an offset cylinder 10H, an arm cylinder 10J, and a bucket cylinder 10K.

  Reference numeral 11 denotes a floor member that is positioned on the upper side of the engine 5 and disposed on the revolving frame 4. The floor member 11 is formed by welding a plurality of steel plates, steel materials, etc., as shown in FIGS. 3 to 5. It is integrally formed, and is configured by a footrest portion 12, a driver seat base 14, a canopy mounting plate 15 and the like which will be described later.

  Reference numeral 12 denotes a footrest portion that constitutes the front side of the floor member 11, and the footrest portion 12 is used by an operator who sits on the driver's seat 16 to place his / her feet through a floor plate cover 35 and the like which will be described later. And the footrest part 12 is formed, for example with the board | plate material etc. which extend in a horizontal direction, and is provided in the front side of the driver's seat 16 as shown in FIG. Further, the front portion side of the footrest portion 12 is a lever / pedal attachment portion 12A to which a traveling lever / pedal or the like is attached, and this lever / pedal attachment portion 12A is attached to the front portion side of the turning frame 4. .

  13 is a tray mounting opening provided in the footrest portion 12 of the floor member 11. The tray mounting opening 13 is located on the rear side of the lever / pedal mounting portion 12A in the footrest portion 12 so that the operator can It is provided in the part where it is put. The tray attachment opening 13 is formed as a substantially rectangular opening that opens into the machine room A, and a tray 19 described later is attached (see FIG. 2).

  Reference numeral 14 denotes a substantially box-shaped driver's seat pedestal that rises upward from the rear side of the footrest portion 12. The driver's seat pedestal 14 extends to the left and right on the upper side of the engine 5, and the driver's seat 16 is attached to the upper surface side thereof. It has a configuration that can be. Further, a canopy mounting plate 15 that extends rearward is provided on the upper end side of the driver seat base 14, and the rear pillar of the canopy 7 is mounted on the canopy mounting plate 15.

  Reference numeral 16 denotes a driver seat provided on the driver seat base 14 of the floor member 12, and the operator seat 16 is seated by an operator. An operation lever 17 is disposed on both the left and right sides of the driver's seat 16, and an operator seated on the driver's seat 16 operates the left and right operation levers 17 to turn the upper swing body 3. The operation and the operation of the work device 10 are controlled.

  Reference numeral 18 denotes an air conditioning unit provided on the floor member 11 at the front side of the driver's seat 16. The air conditioning unit 18 supplies conditioned air such as warm air or cold air to the operator seated on the driver's seat 16. Here, as shown in FIG. 4, the air conditioning unit 18 is disposed on the footrest 12 where the operator puts his / her foot on the floor member 11, and includes a tray 19, a heater device 32, and the like which will be described later.

  Reference numeral 19 denotes a tray provided in the tray mounting opening 13 of the footrest portion 12. The tray 19 accommodates a heater device 32 and a duct 33, which will be described later, as shown in FIG. It accepts outflowing water (drain).

  Here, the tray 19 is formed, for example, as a bottomed box-like body that is recessed downward, and opens upward. Then, the tray 19 is fitted into the tray mounting opening 13 of the footrest portion 12 to close the tray mounting opening 13, and the heater device 32 and the duct 33 are substantially below the footrest portion 12. And is detachably attached to the footrest 12 by means such as screwing.

  Further, as shown in FIGS. 7 and 8, the tray 19 includes a heater-side bottom surface portion 20, a duct-side bottom surface portion 21, a step portion 22, a front surface portion 23, a rear surface portion 24, a left side surface portion 25, a right side surface portion 26, It is constituted by flanges 27, 28, 29, 30 and an intake port 31.

  Reference numeral 20 denotes a heater-side bottom surface portion that constitutes the bottom portion of the tray 19 together with the duct-side bottom surface portion 21 and the like. The heater-side bottom surface portion 20 is formed in, for example, a substantially rectangular flat plate shape and is recessed downward from the footrest portion 12. The heater device 32 is supported from below.

  The heater-side bottom surface portion 20 is an inclined surface portion that is inclined obliquely downward with respect to the horizontal direction, for example, from the rear side toward the front side. Thereby, the drain which flows out from the heater apparatus 32 can be collected by the front part side (lower part side) of the heater side bottom face part 20 with dead weight, and drain is smoothly from the drain hose (not shown) connected to this part. It becomes the composition which can be discharged to.

  21 is a duct side bottom surface portion that is located on the bottom side of the tray 19 and supports a duct 33 described later. The duct side bottom surface portion 21 is connected to, for example, the right end of the heater side bottom surface portion 20, and is connected to the heater side bottom surface portion 20. Also, the upper portion extends substantially horizontally, and is disposed at a position recessed downward from the footrest portion 12. And between the heater side bottom face part 20 and the duct side bottom face part 21, a step part 22 extending upward and downward is formed.

  Reference numeral 23 denotes a front surface portion constituting the front side of the tray 19, and the front surface portion 23 is erected at the front end of the heater side bottom surface portion 20. Further, a rear surface portion 24 is erected at the rear end of the heater side bottom surface portion 20, and a left side surface portion 25 is erected at the left end. Further, a right side surface portion 26 is erected on the right end of the duct side bottom surface portion 21.

  The front surface portion 23, the rear surface portion 24, the left side surface portion 25, and the step portion 22 are recessed so that the heater side bottom surface portion 20 is not leaked around by surrounding the heater side bottom surface portion 20 from four sides. It is configured as a concave tray.

  Reference numeral 27 denotes a front flange provided at the upper end of the front surface portion 23, and the front flange 27 projects substantially horizontally from the front surface portion 23 toward the outside of the tray 19. Further, a rear flange 28, a left flange 29, and a right flange 30 projecting outward are provided on the rear surface portion 24, the left side surface portion 25, and the right side surface portion 26 of the tray 19 in substantially the same manner as the front surface portion 23. These flanges 27, 28, 29, and 30 are formed on the upper surface of the footrest 12 at a position surrounding the tray attachment opening 13 when the tray 19 is fitted into the tray attachment opening 13 of the footrest 12. In this state, the left flange 29 and the right flange 30 are screwed to the footrest portion 12.

  Reference numeral 31 denotes an intake port provided in the tray 19, and the intake port 31 sucks air in the machine room A in which the engine 5, the control valve unit 6 and the like are accommodated into a heater device 32 described later. Here, as shown in FIGS. 6 to 8, the intake port 31 is formed on the left end side of the heater-side bottom surface portion 20 and has a rectangular main intake port 31A extending forward and rearward, and sandwiches the main intake port 31A. Thus, it is comprised by the slit-shaped auxiliary | assistant inlet ports 31B and 31B formed in the front and back direction both ends of the heater side bottom face part 20. The main intake port 31A and the auxiliary intake ports 31B are formed at portions corresponding to an outside air intake port 32D of the heater device 32 described later.

  Reference numeral 32 denotes a heater device as an air conditioner housed in the tray 19, and the heater device 32 supplies conditioned air (warm air) that is appropriately warmed to an operator seated in the driver's seat 16. The heater device 32 is formed in a single box shape as shown in FIG. 6 and is accommodated in the tray 19 together with a duct 33 described later.

  Here, the heater device 32 includes a substantially box-shaped main body case 32A placed on the heater-side bottom surface portion 20 of the tray 19, a blower fan 32B provided in the main body case 32A, and the blower fan 32B. A heater core 32C provided in the main body case 32A located on the downstream side is roughly configured.

  In addition, the main body case 32A is provided with an outside air inlet 32D for taking in outside air when the blower fan 32B is operated, and an air outlet 32E for sending out warm air heated by the heater core 32C. Here, the intake port 31 of the tray 19 described above is provided at a position corresponding to the outside air intake port 32D of the main body case 32A as shown in FIG. 2, and the air in the machine room A flows from the intake port 31 to the outside air intake port 32D. It is configured to be smoothly introduced into the main body case 32A.

  The heater device 32 sucks air into the main body case 32A by rotating the blower fan 32B, warms the air with the heater core 32C, and warms the air from the blower port 32E. The operator is supplied to the operator seated on the driver's seat 16 through the above.

  In this case, since the tray 19 is provided with an air inlet 31 that opens into the machine room A, when the heater device 32 is operated, cold outside air is not sucked into the main body case 32A. As shown by F, the air in the machine room A warmed by the engine 5, the control valve unit 6, and hydraulic equipment such as hydraulic piping is sucked into the main body case 32A from the intake port 31 through the outside air intake port 32D. . Therefore, the heating efficiency by the heater device 32 can be improved by further heating the air previously heated in the machine room A by the heater core 32C.

  Reference numeral 33 denotes a duct attached to the heater device 32. As shown in FIG. 6, the duct 33 has one end connected to the air blowing port 32E of the heater device 32 and is accommodated in the tray 19 together with the heater device 32. It is placed on the duct side bottom surface portion 21. Further, the other end side of the duct 33 extends into a duct cover 34 described later.

  Reference numeral 34 denotes a duct cover provided on the footrest portion 12 on the right front side of the driver's seat 16, and the duct cover 34 is provided with a plurality of air outlets 34A. The warm air introduced from the heater device 32 into the duct cover 34 through the duct 33 is blown out toward the feet, face, etc. of the operator seated on the driver's seat 16 through the air outlets 34A.

  35 is a floor board cover that covers the tray 19, heater device 32, duct 33 and the like of the air conditioning unit 18 from above, and the floor board cover 35 is attached to and detached from the footrest portion 12 of the floor member 11 as shown in FIGS. It is provided as possible. Here, the floor board cover 35 is formed using a metal material or a resin material, and forms a flat floor surface without unevenness so that an operator sitting on the driver's seat 16 can easily put his / her foot on it. A waterproof cover 36, which will be described later, is disposed on the lower surface side of the floor board cover 35, and the upper surface side of the floor board cover 35 is covered with a floor mat (not shown).

  Reference numeral 36 denotes a waterproof cover provided as a cover provided between the air conditioning unit 18 and the floor board cover 35. As shown in FIG. 6, the waterproof cover 36 covers the air conditioning unit 18 from above. The waterproof cover 36 is formed into a thin flat plate shape using, for example, a metal material or a resin material, and always covers the air conditioning unit 18 from above, for example, when washing rainwater or a floor mat (not shown) with water. This prevents the cleaning water or the like from entering the heater device 32.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 is operated while the upper revolving unit 3 is swung by an operator sitting on the driver's seat 16 operating the operation lever 17. The apparatus 10 is moved up and down to excavate earth and sand.

  Here, when the operator turns on a switch (not shown) of the heater device 32 and the blower fan 32B of the heater device 32 rotates, the outside air is sucked into the main body case 32A through the outside air inlet 32D. After being warmed by the heater core 32C, it becomes warm air and is discharged into the duct 33 from the blower port 32E. The warm air discharged into the duct 33 is blown out toward the feet, face, etc. of the operator seated on the driver's seat 16 through the air outlets 34A of the duct cover 34.

  In this case, since the tray 19 is provided with the air inlet 31 that opens into the machine room A, the heater device 32 does not suck in cold outside air, and the engine 5 is controlled as indicated by an arrow F in FIG. Air in the machine room A warmed by the valve unit 6, hydraulic piping, or the like is sucked into the main body case 32A from the intake port 31 through the outside air intake port 32D. Therefore, the heater device 32 can further warm the air previously heated in the machine room A by the heater core 32C, and can improve the heating efficiency by the heater device 32.

  As a result, for example, when working in a cold district, warm air sufficiently warmed around the operator can be constantly supplied, and the canopy-type hydraulic excavator 1 that covers the top of the driver's seat 16 by the canopy 7 can also be used. Can provide a good working environment.

  Moreover, since the air inlet 31 of the tray 19 is provided at a position corresponding to the outside air inlet 32D of the heater device 32 accommodated in the tray 19, the air inlet 31 of the tray 19 and the outside air inlet 32D of the heater device 32 are provided. Can be made as short as possible. For this reason, the warm air in the machine room A can be smoothly led to the heater device 32 from the intake port 31 through the outside air inlet 32D, and the intake efficiency of the heater device 32 can be increased.

  Further, by providing the tray mounting opening 13 in the footrest portion 12 of the floor member 11, the tray 19 can be attached to the tray mounting opening 13 while being recessed below the footrest portion 12. Accordingly, the air inlet 31 of the tray 19 can be disposed below the floor member 11 (on the side of the turning frame 4). For example, even when rain water, washing water or the like hits from the upper side of the floor member 11, this water droplet Can be prevented from entering the heater device 32 through the air inlet 31. As a result, the reliability and durability of the heater device 32 can be improved as compared with the case where outside air is introduced from the upper side of the floor member.

  Further, since the tray mounting opening 13 is formed in the footrest portion 12 of the floor member 11 and the tray 19 is attached to the tray mounting opening 13, the floor member 11 and the tray 19 are formed as separate members. be able to. For this reason, for example, even when the floor member has a complicated shape, the floor member can be easily manufactured, and the degree of freedom in design can be increased and the productivity can be increased.

  Further, since the tray 19 is attached to the tray mounting opening 13 provided in the floor member 11 (footrest portion 12), for example, the heater device 32 and the like are stored in the tray 19 in advance. The tray 19 can be attached to the tray attachment opening 13 together, and the workability at the time of assembly can be improved.

  Furthermore, since the upper surface side of the air conditioning unit 18 is covered with the waterproof cover 36, for example, rain water, washing water when washing a floor mat (not shown), etc., are inadvertently applied to the heater device 32, the duct 33, and the like. Intrusion can be prevented, and the reliability and durability of the air conditioning unit 18 can be improved.

  In the above-described embodiment, the intake port 31 of the tray 19 is made to have a rectangular main intake port 31 </ b> A formed on the left end side of the heater side bottom surface portion 20, and both front and rear side ends of the heater side bottom surface portion 20. Are formed by slit-shaped auxiliary intake ports 31B and 31B.

  However, the present invention is not limited to this. For example, as in the first modified example shown in FIG. 9, the inlet 31 ′ of the tray 19 ′ is formed at a corner where the heater-side bottom surface portion 20 and the left-side surface portion 25 intersect. The main intake port 31A 'formed in a rectangular shape by notching the part and auxiliary intake ports 31B and 31B sandwiching the main intake port 31A' may be used. In this case, the opening area of the main intake port 31A ′ can be increased, and a large amount of warm air in the machine room A can be taken into the heater device 32 accordingly.

  Moreover, in embodiment mentioned above, the tray mounting opening 13 is provided in the footrest part 12 of the floor member 11, and the structure which attaches the tray 19 of the air conditioning unit 18 provided separately in this tray mounting opening 13 is illustrated. ing. However, the present invention is not limited to this. For example, as in the second modification shown in FIG. 10, the floor member 41 is formed by the footrest portion 42, the driver seat base 43, and the canopy mounting plate 44. A bottomed box-like tray portion 45 may be integrally formed on 42, and air inlets 45 </ b> A and 45 </ b> B may be provided on the tray portion 45.

  Moreover, in embodiment mentioned above, the heater apparatus 32 which blows off warm air as an air conditioner is mentioned as an example, and is demonstrated. However, the present invention is not limited to this. For example, an air conditioner that can blow out both warm air and cold air may be used.

  Moreover, in embodiment mentioned above, the case where both the waterproof cover 36 and the floor board cover 35 are used as a cover which covers the upper surface side of the heater apparatus 32 is illustrated. However, the present invention is not limited to this, and for example, only one of the waterproof cover 36 and the floor board cover 35 may be used to cover the upper surface side of the heater device 32.

  Furthermore, in the above-described embodiment, the hydraulic excavator 1 provided with the offset type working device 10 as a construction machine has been described as an example. However, the present invention is not limited to this, and can also be applied to a swing-type hydraulic excavator 51 with a canopy specification having a canopy 7 ′, for example, as in a third modification shown in FIG. 11.

  That is, the hydraulic excavator 51 including the swing type working device 52 including the swing post 52A, the boom 52B, the arm 52C, the bucket 52D, the swing cylinder (not shown), the boom cylinder 52E, the arm cylinder 52F, and the bucket cylinder 52G is also used. Can be applied.

1 is a front view showing a hydraulic excavator to which an embodiment of the present invention is applied. FIG. 2 is an enlarged view of a main part of the engine, machine room, air conditioning unit, etc. in FIG. It is a perspective view which shows a floor member, a driver's seat, 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 member alone. It is a disassembled perspective view which shows a floor member, a tray, an air conditioning unit, a waterproof cover, etc. It is the perspective view which looked at the tray and the air inlet from the upper surface side. It is the perspective view which looked at the tray and the air inlet from the lower surface side. It is a perspective view similar to FIG. 8 which shows the tray by a 1st modification. It is a perspective view which shows the floor member which integrally formed the tray by the 2nd modification. It is a front view which shows the swing type hydraulic excavator by the 3rd modification.

Explanation of symbols

1,51 Hydraulic excavator (Construction machine)
2 Lower traveling body 3 Upper revolving body 4 Turning frame 5 Engine 6 Control valve unit (hydraulic equipment)
7, 7 'Canopy 10, 52 Work device 11, 41 Floor member 12, 42 Foot rest 13 Tray mounting opening 16 Driver's seat 19, 19' Tray 31, 31 ', 45A, 45B Air intake 32 Heater device (air conditioner) )
32D Outside air intake 36 Waterproof cover (cover)
45 Tray section (tray)
A Machine room

Claims (6)

A self-propelled lower traveling body, an upper revolving body mounted so as to be able to swivel on the lower traveling body, and a working device provided on the upper revolving body so as to be able to be lifted and lowered,
The upper swing body includes a swing frame formed as a support structure, an engine serving as a power source mounted on the rear side of the swing frame, and is mounted on the swing frame positioned on the front side of the engine. A driver seat on which the operator is seated, a floor member provided with a footrest portion located on the front side of the driver seat, and an operator seated on the driver seat by sucking outside air provided on the footrest portion of the floor member In a construction machine configured with an air conditioner that supplies air,
The footrest part of the floor member is provided with a tray for accommodating the air conditioner,
A construction machine according to claim 1, wherein the tray is provided with an air inlet for taking in air in a machine room in which the engine and hydraulic equipment are accommodated.   2. The construction machine according to claim 1, wherein the air conditioner is a heater device that supplies warm air, and is configured to suck air warmed by the engine or hydraulic equipment from an air inlet provided in the tray.   The construction machine according to claim 1, wherein the driver's seat is configured to be covered with a canopy specification building.   The construction machine according to claim 1, 2 or 3, wherein the intake port provided in the tray is provided at a position corresponding to an outside air intake port of the air conditioner.   The construction according to claim 1, 2, 3, or 4, wherein a tray mounting opening is provided in a footrest portion of the floor member, and the tray is mounted in the tray mounting opening in a state of being recessed downward. machine.   The construction machine according to claim 1, 2, 3, 4 or 5, wherein the upper surface side of the air conditioner is configured to be covered with a metal or resin cover.

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