JP2003291629A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To exchange a standard driver seat for a driver seat with spit hole having spit holes by simple work. <P>SOLUTION: The casing 22 of an air conditioning unit 21 is provided with a blast hole 33 for driver seats at a position of a blast hole 30 for a back section, and with the standard driver seat 40 exchanged for the driver seat 10 with spit holes, the duct 19 for the driver seat 10 with spit holes is connected to the blast hole 33 for driver seats. Since, therefor, the air conditioning unit 21 can be used for either the standard driver seat 40 or the driver seat 10 with spit holes, the standard driver seat 40 can be exchanged for the driver seat 10 with spit holes without exchanging the air conditioning unit 21 only by unloading the driver seat 40, loading the driver seat 10 and connecting the duct 19 for driver seats to the blast hole 33. With the standard driver seat 40 arranged in a cab 7, the blast hole 33 can be closed by attaching a lid body 46 to the blast hole 33 for driver seats. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine such as a hydraulic excavator or a hydraulic crane equipped with an air conditioning unit for supplying conditioned air into a cab.

[0002]

2. Description of the Related Art Generally, a hydraulic excavator as a construction machine includes a lower traveling body which can be self-propelled, an upper revolving body which is rotatably mounted on the lower traveling body, and a hoisting motion on a front side of the upper revolving body. It is generally configured by a work device that is provided so as to be possible.

Further, the upper revolving structure is provided with a cab on the front side of the revolving frame, and in the cab, a driver's seat on which an operator is seated, a lever operated by the operator, and conditioned air consisting of cold air or warm air are provided. An air conditioning unit for supplying air into the cab from a blower opening via a duct is provided.

Here, the operator seated in the driver's seat is
The buttocks and back are in close contact with the driver's seat, and conditioned air from the air conditioning unit cannot be blown to these parts. Therefore, the buttocks, back, etc., which are in close contact with the driver's seat, are stuffy in the summer and cold in the winter.

Therefore, some hydraulic excavators are equipped with a driver's seat with a blow-out port equipped with a blow-out port for blowing conditioned air directly to the buttocks, back, etc. of an operator sitting in the driver's seat. The driver's seat of the conventional hydraulic excavator is, for example, Japanese Utility Model Laid-Open No. 5-51144, Japanese Utility Model Laid-Open 6-6.
It is known from Japanese Patent No. 3416, Japanese Utility Model Publication No. 7-24159, and the like.

[0006] Here, the standard driver's seat which is not provided with an air outlet is composed of a seat portion on which the operator sits down and a backrest portion on which the operator leans, respectively, a frame,
It is composed of a cushion material and a skin covering them.

On the other hand, the driver's seat with an outlet equipped with an outlet is
A hole that penetrates in the thickness direction is formed in the approximate center of the cushioning material, and an air outlet connected to the air conditioning unit via a duct is attached to this hole, and the skin has a large number of small holes in the part corresponding to the hole. A hole is provided or a net member is sewn separately.

As a result, the air outlet blows out conditioned air toward the buttocks, thighs, back, etc., which are in close contact with the driver's seat when the operator is seated, to alleviate the stuffiness in summer and the chill in winter, and the operator's work. The environment is good.

In the hydraulic excavator constructed as described above, for example, in summer work, cool air harmonized in the air conditioning unit is blown into the cab from the outlet through the duct to lower the temperature in the cab and improve the working environment. ing. However, when the operator is seated in the driver's seat, cold air does not reach the parts closely attached to the driver's seat, buttocks, thighs, back, etc.
It is not possible to cool these parts.

Therefore, cold air is supplied from the air conditioning unit to the air outlet of the driver's seat with an air outlet, and the cold air is blown directly from the air outlet to the buttocks, thighs, back, etc. of the operator to cool it. Similarly, in the winter, warm air is supplied to the operator to warm it.

[0011]

By the way, in the hydraulic excavator according to the above-mentioned prior art, by installing the driver seat with the air outlet having the air outlet, the operator directly sits on the buttocks, back, etc. of the operator seated in the driver seat. The conditioned air can be blown to the air, which reduces the stuffiness in the summer and the chill in the winter, improving the working environment of the operator.

However, since the driver's seat with an outlet is more expensive than the standard driver's seat, the standard excavator is equipped with a standard driver's seat without an outlet.

Here, when the work environment of the hydraulic excavator, for example, work under the scorching sun, is forced, it is desirable to install a driver seat with an outlet in place of the standard driver seat. In this case, the driver's seat must be replaced with a driver's seat with an outlet, and the air conditioning unit must be replaced with a driver's duct that can connect to the driver's seat with an outlet. For this reason, it takes a lot of labor and cost to replace them,
There is a problem that the replacement cost increases.

Further, since the driver's seat with an outlet according to Japanese Utility Model Laid-Open No. 5-511144 and Japanese Utility Model Laid-Open No. 7-24159 is equipped with a blower separate from the air conditioning unit, the control becomes complicated and the manufacturing cost is low. Will increase. Moreover,
The driver's seat with an outlet according to these conventional techniques sucks in the air in the room and blows it out from the outlet, so that, for example, when performing work with the cab door or front window open, it is equivalent to the outside air temperature. There is a problem in that the temperature of the air is blown to the operator, and the operator's stuffiness and coldness cannot be alleviated.

Further, the driver's seat with an outlet according to Japanese Utility Model Laid-Open No. 6-63416 has a structure in which the outlet is only connected to the air conditioning unit side through a duct, so that conditioned air is blown into the cab. The blowout ratio of the conditioned air is fixed between the blowout port and the blowout port of the driver seat with a blowout port. Therefore, if the temperature and the air volume of the conditioned air supplied to the operator from the air outlet of the driver's seat with an air outlet are changed, the temperature and the air volume of the conditioned air supplied from the air outlet to the cab will also be changed. In addition, there is a problem that the operator cannot feel the discomfort because the temperature and the air volume cannot be adjusted.

When the outside air temperature is very high and the temperature inside the cab is as high as the outside air temperature, it is necessary to blow out a large amount of conditioned air at a low temperature in order to make the inside of the cab comfortable. On the other hand, when the outside air temperature is very low and the temperature inside the cab is as low as the outside air temperature, it is necessary to blow out a large amount of conditioned air at a high temperature. However, when the air conditioning unit is started, heat exchange is difficult and conditioned air at a temperature close to room temperature is blown out, so the temperature of the air outlet of the driver's seat with an air outlet is opposite to the required temperature, that is, in the cab. There is a problem that high temperature conditioned air is supplied when the temperature is high, and low temperature conditioned air is supplied to the operator when the temperature inside the cab is low, which causes discomfort.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to replace a standard driver's seat with a driver's seat with an outlet by a simple operation. The purpose is to provide the construction machine.

[0018]

According to a first aspect of the present invention, there is provided a construction machine including a cab provided on a vehicle body, a driver's seat provided in the cab, on which an operator sits, and cold or warm air provided in the cab. And an air conditioning unit for supplying conditioned air from the blower opening into the cab through a duct.

In order to solve the above-mentioned problems,
The feature of the configuration adopted by the invention of claim 1 is that the air conditioning unit or the duct is provided with a driver's seat air outlet for supplying conditioned air to the driver's seat, and the driver's seat is provided with an outlet for conditioned air. In the case of a seat, the air outlet of the driver's seat and the air outlet for the driver's seat are connected via a duct for the driver's seat, and the driver's seat is a standard driver's seat that does not have a conditioned air outlet. In this case, a lid is attached to the air outlet for the driver's seat to close it.

With this configuration, when the driver seat with the outlet is installed in place of the standard driver seat without the outlet, the driver seat with the outlet is installed after removing the standard driver seat. Further, the lid that closes the driver's seat air outlet is removed, and the driver's seat duct extending from the air outlet is connected to the driver's seat air outlet. Thereby, the driver's seat can be easily replaced without replacing the air conditioning unit. The air conditioning unit can supply conditioned air to the operator seated in the driver's seat through the driver's seat duct and the air outlet.

On the other hand, when the standard driver's seat is installed, the conditioned air can be prevented from leaking by closing the driver's seat ventilation port with the lid.

According to the second aspect of the present invention, a passage area adjusting means for adjusting the passage area is provided in the driver's seat blower opening or the driver's seat duct.

With this configuration, the passage area adjusting means can adjust the flow rate of the conditioned air blown out from the air outlet by adjusting the passage area in the duct, and the operator can obtain an appropriate amount of conditioned air. Can be sprayed. Moreover, when heat exchange does not proceed and the conditioned air is in a high temperature state or a low temperature state immediately after the start of air conditioning, the passage area adjusting means closes the duct so that the high temperature or low temperature air is discharged to the operator. Can be prevented from being sprayed on.

According to the third aspect of the present invention, the blower port for the driver's seat is provided at the blower port for the back portion to which the duct is connected on the back side of the driver's seat.

With this configuration, the back blower vent supplies conditioned air through the duct so as to form a conditioned air flow in the cab. It does not require a large amount of conditioned air as compared to a vent that supplies conditioned air. Therefore, by utilizing a part of the conditioned air to the back air blowing port to the driver's seat air blowing port, the distribution balance of the conditioned air can be improved.

According to the invention of claim 4, the blower port is a back blower port to which a duct is connected on the back side of the driver's seat, and the driver's seat blower port is connected to the back blower port and is inside the cab. It is located in the back duct that supplies conditioned air.

With this structure, the back blower port and the back duct supply conditioned air so as to form a conditioned air flow in the cab. It does not require a large amount of conditioned air as compared to a vent and a duct that supply conditioned air. Therefore, the distribution balance of the conditioned air can be improved by utilizing a part of the conditioned air to the back air blowing port and the back air duct to the driver's seat air blowing port.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a construction machine according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6 by taking a hydraulic excavator as an example.

Reference numeral 1 denotes a hydraulic excavator as a construction machine applied to the present embodiment. The hydraulic excavator 1 constitutes a self-propelled lower traveling body 2 and a vehicle body together with the lower traveling body 2, The upper traveling body 3 is rotatably mounted on the lower traveling body 2, and a working device 4 is provided on the front side of the upper traveling body 3 so as to be able to move upward and downward and excavates earth and sand. . Here, in the upper swing body 3, a building cover 6, a cab 7 described later, and the like are arranged on the swing frame 5.

Reference numeral 7 denotes a cab arranged on the front left side of the revolving frame 5, and the cab 7 is three-dimensionally formed by a cab box 7A that covers the surroundings and a floor plate 7B that covers the lower part, as shown in FIG. ing. Further, a door 7C (shown in FIG. 1) through which an operator enters and exits is provided on the left side of the cab box 7A. On the other hand, a front glass (not shown) covering the front side of the cab box 7A can be opened and closed for the time when the operator leans out and performs an operation.

Further, inside the cab 7, a driver's seat 10 with a blow-out port or a standard driver's seat 40, which will be described later, is disposed at a substantially central portion of the floor plate 7B. The left and right of these driver's seats 10, 40 are arranged. A working lever 8 (only the left side is shown) for operating the working device 4 and the like is provided on both sides, and a traveling lever 9 for traveling the lower traveling body 2 is provided on the front side.

As the driver's seat provided in the cab 7, the driver's seat 10 with a blow-out port capable of directly blowing the conditioned air to the seated operator and the operator's seat only There is a standard driver's seat 40. First, the case where the driver seat 10 with an outlet is attached inside the cab 7 will be described.

Reference numeral 10 is a driver seat with an outlet provided in the cab 7. The driver seat 10 with an outlet is mounted on a floor plate 7B on the base 1
It is arranged through 1. And driver seat 1 with outlet
As shown in FIG. 3, 0 is generally constituted by a seat frame 12, three-dimensional skins 13 and 14, blowout ports 15 and 16 and the like, which will be described later.

Reference numeral 12 denotes a seat frame which forms the skeleton of the driver's seat 10 with an outlet. The seat frame 12 is, for example, a frame formed by bending a circular pipe material into a quadrangular shape, and has a pedestal 11
A seat frame 12A arranged horizontally above and the seat frame 1
Backrest frame 12B vertically arranged on the rear side of 2A
And the left and right support members 12C, 12C that tiltably support the backrest frame 12B on the seat frame 12A.

Reference numeral 13 denotes a seat frame 12A of the seat frame 12.
A three-dimensional skin for a seat attached to the
3 has a configuration shown in, for example, JP 2001-87077 A. That is, the three-dimensional seat skin 13 is formed, for example, by weaving polyester-based fibers, and specifically, includes a front mesh layer, a back mesh layer, and a large number of piles interposed so as to connect the mesh layers at intervals. It has a three-dimensionally woven truss structure. Accordingly, the three-dimensional seat skin 13 has sufficient strength and cushioning property (spring property), and is also excellent in breathability. The periphery of the three-dimensional seat skin 13 is attached to the seat frame 12A.

14 is a backrest frame 1 of the seat frame 12.
The backrest three-dimensional skin attached to 2B is formed in the same manner as the seat three-dimensional skin 13, and the periphery thereof is attached to the backrest frame 12B.

15 is a seat frame 12A of the seat frame 12.
A seat outlet provided on the lower side of the seat, and the seat outlet 1
Reference numeral 5 blows conditioned air supplied from an air conditioning unit 21 described later on the buttocks and thighs of the operator. The seat outlet 15 is horizontally attached to the seat frame 12A so that the upper side is opened. The seat outlet 15 is connected to the air conditioning unit 21 via a driver seat duct 19 described later.

Reference numeral 16 is a backrest frame 1 of the seat frame 12.
A backrest outlet provided on the rear side of 2B. The backrest outlet 16 blows the conditioned air supplied from the air conditioning unit 21 onto the operator's back. The backrest outlet 16 is vertically attached to the backrest frame 12B so that the front side is open. The backrest outlet 16 is connected to the air conditioning unit 21 via the driver's seat duct 19.

Reference numeral 17 is a backrest frame 1 of the seat frame 12.
Reference numeral 18 denotes a headrest attached to the upper portion of 2B, and 18 denotes armrests attached to the left and right sides of the backrest frame 12B.

Reference numeral 19 denotes a driver's seat duct provided so as to be connected to the seat outlet 15 and the backrest outlet 16, and the driver's seat duct 19 has a tip at the front end of a seat tube 19A and a backrest tube 1.
It branches to 9B. And the duct 19 for the driver's seat
The conditioned air from the air conditioning unit 21 is supplied to the seat outlet 15 via the seat tube 19A, and is supplied to the backrest outlet 16 via the backrest tube 19B. Further, the driver seat duct 19 is, as shown in FIG.
It is connected to a blower port 33 for the driver's seat, which will be described later and is provided on the air conditioning unit 21 and extends rearward.

Reference numeral 20 denotes an adjusting valve provided as a passage area adjusting means provided near the air conditioning unit 21 of the driver's seat duct 19, and the adjusting valve 20 is rotated as shown by a solid arrow. The passage area in the driver's seat duct 19 is adjusted. The adjusting valve 20 is connected to a control device (not shown) that controls the air conditioning.

Reference numeral 21 denotes an air conditioning unit which constitutes an indoor unit arranged in the cab 7. The air conditioning unit 21 supplies the sucked air into the cab 7 as conditioned air consisting of cold air or warm air. In addition, the air conditioning unit 21
Is arranged on the back side of the driver's seat 10 with an outlet. As shown in FIG. 4, the air conditioning unit 21 is composed of a casing 22, a blower 23, an evaporator 25, a heater core 26, a front air outlet 28, a foot air outlet 29, a back air outlet 30 and the like, which will be described later. .

Reference numeral 22 denotes a casing of the air conditioning unit 21,
The casing 22 is provided at one end with an air inlet 22A that opens upward, for example, and at the other end, a front air outlet 28, a foot air outlet 29, and a back air outlet 30 that are described later. It is formed like a body. Further, an inside / outside air switching box (not shown) that is located above the air intake port 22A and switches between the inside air and the outside air is provided at one end of the casing 22.

Reference numeral 23 denotes an air intake 22A of the casing 22.
In the blower provided at the position, the blower 23 drives the motor 24 to suck the inside air or the outside air into the casing 22 from the air intake port 22A and forcibly blow the air toward the other side. is there.

Reference numeral 25 denotes an evaporator as a cooler, which is provided in the casing 22 near the downstream side of the blower 23. The evaporator 25 cools the air supplied from the blower 23. Is arranged so as to close the passage. Here, the evaporator 25 is connected to an outdoor unit (not shown) including a condenser, a compressor, an expansion valve, etc. arranged in the building cover 6, and constitutes an air conditioner together with the outdoor unit. There is.

Reference numeral 26 is a heater core located downstream of the evaporator 25 and provided in the lower portion of the casing 22. The heater core 26 is arranged so as to close almost half of the passage in the casing 22. There is. Here, the heater core 26 is connected to, for example, a water jacket and a radiator of the engine through piping, and hot water such as engine cooling water is circulated through a hot water valve (neither is shown). As a result, the heater core 26 is attached to the casing 22.
It forms part of the heating system that warms the air flowing inside.

27 is an evaporator 25 and a heater core 26.
And a temperature adjusting damper provided in the casing 22 between the and, and the temperature adjusting damper 27 is formed as a rotating plate body, and is formed by, for example, a solid line with an upper end side corner of the heater core 26 as a fulcrum. It is attached so as to be rotatable in the direction shown by the arrow. The temperature adjusting damper 27 adjusts the flow rate of the air passing through the heater core 26 and the flow rate of the air passing through the evaporator 25 to form conditioned air having an appropriate temperature.

Reference numeral 28 denotes a front air blower provided on the upper end of the other end of the casing 22. The front air blower 28 supplies front air, which will be described later, to the front side of the operator or the front glass of the cab 7. The duct 34 is connected,
For example, it is formed in a tubular shape protruding from the casing 22 to the front side or the right side.

Reference numeral 29 denotes a foot ventilation port which is located below the front ventilation port 28 and is provided at the other end of the casing 22.
The foot ventilation port 29 is connected to a foot duct 36, which will be described later, which supplies conditioned air to the feet of the operator.
For example, it is formed in a cylindrical shape protruding from the casing 22 to the front side.

Reference numeral 30 denotes a back blower port provided on the other end side of the casing 22. The back blower port 30 supplies a conditioned air to the back side of the operator (driver's seat 10), which will be described later. Is to be connected. Further, the back blower port 30 is formed, for example, in a tubular shape protruding upward from the casing 22, and a driver's seat blower port 33, which will be described later, is provided midway in the vertical direction.

Reference numeral 31 denotes the casing 22 of the foot ventilation port 29.
The switching dampers 32 and 32 provided in the inner opening portions are the switching dampers provided in the opening portion of the casing 22 of the back blower port 30, respectively. The respective switching dampers 31 and 32 are indicated by solid arrows. The front air blower 28, the foot air blower 29, and the back air blower 30.
Is adjusted, that is, the distribution of the conditioned air to the blower ports 28, 29, 30 is adjusted.

Reference numeral 33 denotes a driver's seat blower port provided in the back blower port 30. The driver's seat blower port 33 has a blowout port when the driver's seat 10 with a blowout port is mounted in the cab 7. A driver seat duct 19 for supplying conditioned air is connected to the outlets 15 and 16 of the driver seat 10. Further, the driver's seat blower port 33 has a tubular shape extending forward toward the driver's seat 10 with an outlet, whereby the driver's seat duct 19 extending from the driver's seat 10 to the rear side can be easily connected. it can. On the other hand, the driver seat air blow port 33 is
When not connected, it can be closed by a lid 46 described later.

Reference numeral 34 denotes a front surface duct whose base end side is connected to the front surface air outlet 28 of the air conditioning unit 21, and the front surface duct 34 extends forward along the right side surface of the cab 7, as shown in FIG. The front end side thereof rises upward at the front part of the cab 7. Further, a louver 35, which serves as a front air outlet, is attached to the tip of the front duct 34,
The louver 35 supplies the conditioned air blowing direction toward the front glass of the cab 7 or the front side of the operator seated in the driver's seat 10.

Reference numeral 36 is a foot duct whose base end side is connected to the foot ventilation port 29 of the air conditioning unit 21. The foot duct 36 extends forward in the pedestal 11 and its tip end is located at the operator's foot. ing. Also, the foot duct 36
The tip of the is a foot outlet 37 for blowing conditioned air to the operator's feet.

Reference numeral 38 denotes a back duct which is connected to the back blower port 30 of the air conditioning unit 21 at a base end side thereof. The back duct 38 extends upward, and its tip portion serves as a back blowout port 39. Here, the back duct 38 supplies conditioned air from the back outlet 39 to the back side of the driver's seat 10 to form an air flow in the cab 7 by the conditioned air. Therefore, the flow rate of the conditioned air blown out from the back outlet 39 of the back duct 38 becomes equal to the required flow rate of the conditioned air blown out of the louver 35 of the front duct 34 and the foot outlet 37 of the foot duct 36. In comparison, there is no problem even with a small flow rate.

Next, the standard driver's seat attached to the standard hydraulic excavator will be described with reference to FIG. This driver's seat is intended only for the operator to sit on, and does not have a structure in which conditioned air is blown to the operator's buttocks, back or the like.

Reference numeral 40 is a standard driver's seat as shown in FIG. 5, and the driver's seat 40 is a seat portion 41 mounted on the pedestal 11.
And a backrest portion 42 provided on the rear side of the seat portion 41.
And left and right supporting members 43 (only the left side is shown) for supporting the backrest portion 42 at the rear portion of the seat portion 41 so that the angle can be adjusted.
And a headrest 44 attached to the upper portion of the backrest portion 42, and armrests 45 (only the left side is shown) attached to the left and right sides of the backrest portion 42, respectively. Here, the seat portion 41 and the backrest portion 42 are configured by a frame frame, a cushion material made of spring and urethane foam, and a skin covering these.

Reference numeral 46 designates the standard driver's seat 40 inside the cab 7.
Is a lid that is attached to the driver-seat blower port 33 of the air conditioning unit 21 when the driver-seat blower port 33 is not used, as shown in FIG. The air outlet 33 for the driver's seat is closed to prevent conditioned air from leaking.

The hydraulic excavator according to the present embodiment has the above-mentioned structure. Next, the operation of the standard hydraulic excavator in which the standard driver's seat 40 is mounted in the cab 7 will be described.

First, the operator gets in the cab 7, sits in the driver's seat 40, and operates the traveling lever 9 to cause the lower traveling body 2 to travel. Further, when the work lever 8 is operated, the work device 4 can be lowered and the upper swing body 3 can be swung to excavate the earth and sand.

During the above-mentioned work, the air conditioning unit 21 is activated according to the temperature at that time, cold air is blown into the cab 7 during the work in summer, and the cab 7 is run during the work in winter.
Hot air is blown into the room to maintain a proper room temperature.

That is, when the air conditioning unit 21 is activated, the blower 23 is rotationally driven by the motor 24, and the air is taken into the casing 22 through the air intake 22A. In the summer, the temperature adjusting damper 27 is arranged at the position indicated by the solid line, so the taken-in air is cooled by the evaporator 25 to become cold air. On the other hand, in winter, by arranging the temperature control damper 27 at the position shown by the chain double-dashed line, the air that has passed through the evaporator 25 is
The heater core 26 is guided by the temperature adjusting damper 27 and flows through the heater core 26, and is warmed by the heater core 26 to become warm air.

A part of the conditioned air adjusted to an appropriate temperature in this manner is a front air outlet 28 and a front duct 34.
Through the louver 35 toward the front glass of the cab 7, the operator or the like. Further, a part of the conditioned air is blown toward the operator's feet from the foot outlet 37 through the foot air outlet 29 and the foot duct 36. Further, a part of the conditioned air passes through the back blower port 30 and the back duct 38 and flows from the back blower outlet 39 to the cab 7.
It is blown out inside. As a result, the temperature inside the cab 7 can be adjusted to a temperature at which it is easy to work.

However, when operating the hydraulic excavator with the cab 7 open, for example, with the door 7C of the cab 7 open and calling out to the surrounding workers, the front glass of the cab 7 is opened. There are cases where the user leans out and operates. In such a case, the inside of the cab 7 becomes equivalent to the outside air temperature. Also, the cab 7 of the hydraulic excavator is
Because the glass occupies a large area to widen the field of view,
The temperature inside the cab 7 rises due to solar radiation.

Therefore, the hydraulic excavator is additionally provided with a driver's seat 10 with an outlet capable of directly blowing conditioned air to the operator. The driver's seat 10 with an outlet is replaced with a standard driver's seat 40. Can be installed.

Explaining the work of attaching the driver's seat 10 with an outlet, the standard driver's seat 40 is removed from the pedestal 11,
Instead of the standard driver's seat 40, the driver's seat 10 with an outlet is installed. Next, the lid 46 that closes the driver's seat blower port 33 of the air conditioning unit 21 is removed, and the driver's seat duct 19 connected to the outlets 15 and 16 of the driver's seat 10 with a blower outlet is blown for the driver's seat. Connect to mouth 33. Also, the driver seat duct 19
Electrical wiring extending from the regulating valve 20 provided in the control unit is connected to the control device. The driver's seat 40 can be replaced with the driver's seat 10 with an outlet by such work.

As a result, a part of the air conditioned by the air conditioning unit 21 is partially blown by the back blower port 30 and the driver seat blower port 3.
3. The air is supplied to the seat air outlet 15 and the backrest air outlet 16 of the driver seat 10 with the air outlet through the driver seat duct 19.
The air is blown from the outlets 15 and 16 onto the buttocks, back and the like of the operator. Therefore, even when the door 7C of the cab 7 and the front glass are open, the working environment of the operator can be improved by the conditioned air blown directly from the outlets 15 and 16.

Moreover, when the temperature of the air inside the casing 22 of the air conditioning unit 21 is high in the summer, or when the heater core 26 is not warm in the winter,
By closing the driver's seat duct 19 with the adjusting valve 20, it is possible to prevent unbalanced unpleasant air from being blown to the operator.

When the outside air temperature is very high or low, it is necessary to blow out a large amount of conditioned air at the maximum temperature or the minimum temperature in order to make the temperature inside the cab 7 comfortable. In this case, an appropriate amount of conditioned air can be blown to the operator's buttocks, back, etc. by reducing the passage area of the driver's seat duct 19 by the adjusting valve 20.

Thus, according to the present embodiment, the casing 22 of the air conditioning unit 21 is provided with the driver's seat blower port 33 located at the back blower port 30, and the driver's seat is blown from the standard driver's seat 40. When the driver seat 10 is replaced with the driver seat 10, the driver duct 19 of the driver seat 10 with the outlet is connected to the driver air outlet 33. Therefore, the air conditioning unit 21 includes the standard driver's seat 40 and the driver's seat 10 with an outlet.
Since it can be used in any of the above, the air conditioning unit 21 can be used in common and the driver's seat 10 and 40 can be attached / detached and the driver's seat duct 19 can be connected.
It can be easily replaced, and workability can be improved and cost can be reduced.

In the state where the standard driver's seat 40 is provided in the cab 7, the driver's blower port 33 can be closed by attaching the lid 46, so that the conditioned air from the driver's blower port 33 can be closed. It is possible to eliminate the leakage.

Further, the driver's seat duct 19 is provided with an adjusting valve 20 for adjusting the passage area, and the adjusting valve 20 shuts off or limits air which the operator feels uncomfortable, such as hot air in summer and cold air in winter. Therefore, it is possible to blow only suitable temperature and suitable amount of conditioned air to the operator.
The working environment can be further improved.

Further, since the driver's seat blower opening 33 is provided in the back blower opening 30, the louver 35 of the front duct 34 and the foot outlet 37 of the foot duct 36 which require a large amount of conditioned air. Therefore, conditioned air to the back duct 38 can be used without any problem even with a small flow rate. As a result, conditioned air is supplied to the cab 7 and the driver's seat 10.
(Operator) can be supplied in good balance.

In the embodiment, the air conditioning unit 21
The case where the driver's seat blower port 33 is provided in the back blower port 30 has been described as an example. However, the present invention is not limited to this. For example, as in the modified example shown in FIG. 7, the driver duct 33 'is provided in the back duct 38', and the driver's vent 33 'is provided in the driver seat. The duct 19 'may be connected. Even in the case of such a configuration, as in the first embodiment described above, a part of the conditioned air supplied to the driver's seat 10 and the operator's back side via the back duct 38 ′ is used, Conditioned air for driver's seat duct 1
It can be supplied to the operator seated in the driver's seat 10 via 9 '.

Further, in the embodiment, the adjusting valve 20 constituting the passage area adjusting means has been described as provided in the driver seat duct 19, but the present invention is not limited to this, and for example, two points in FIG. As shown by the chain line, the adjusting valve 20 'may be provided in the driver's seat blow port 33. Further, the adjusting valve 20 may be arranged near the driver's seat 10 in the driver's seat duct 19.

Furthermore, in the embodiment, the hydraulic excavator has been described as an example of the construction machine, but the present invention is not limited to this, and may be applied to other construction machines such as a hydraulic crane. .

[0077]

As described above in detail, according to the first aspect of the invention, the air conditioning unit or the duct is provided with the driver's seat ventilation port for supplying the conditioned air to the driver's seat, and the driver's seat has the conditioned air outlet. In the case of a driver's seat with an outlet, the driver's seat outlet and the driver's air outlet are connected via a driver's duct, and the driver's seat has a conditioned air outlet. In the case of a standard driver's seat that is not installed, a lid is attached to the driver's seat blower opening to close it.

Therefore, in the case of installing the driver's seat with the outlet in place of the standard driver's seat without the outlet, the driver's seat with the outlet is installed after removing the standard driver's seat. Further, the lid that closes the driver's seat air outlet is removed, and the driver's seat duct extending from the air outlet is connected to the driver's seat air outlet. Accordingly, the driver's seat can be easily replaced without replacing the air conditioning unit, and workability can be improved and cost can be reduced.

On the other hand, when the standard driver's seat is attached, the conditioned air can be prevented from leaking from the driver's seat by closing the driver's seat with the lid.

According to the second aspect of the present invention, since the driver's seat blower opening or the driver's seat duct is provided with the passage area adjusting means for adjusting the passage area, the passage area adjusting means is blown out from the outlet. The flow rate of conditioned air can be adjusted. This makes it possible to blow an appropriate amount of conditioned air that the operator feels comfortable and also to close the duct when the conditioned air is in a high temperature state or a low temperature state immediately after the start of air conditioning. As a result, unpleasant air can be prevented from being blown on the operator, and the working environment can be made more comfortable.

According to the third aspect of the present invention, the driver's seat blower port is provided at the back part blower port to which the duct is connected on the back part side of the driver's seat. Therefore, compared with, for example, a windshield that supplies conditioned air to the windshield or the operator, a part of the conditioned air to the back air outlet that does not require a large amount of conditioned air is used to blow the driver's seat air. Can be supplied to the air conditioner, and the distribution balance of conditioned air can be improved.

According to the invention of claim 4, the blower port is a back blower port to which the duct is connected on the back side of the driver's seat, and the driver's seat blower port is connected to the back blower port and inside the cab. Since it is provided in the back duct for supplying conditioned air to the above, it is possible to obtain substantially the same operational effect as the invention of claim 3 described above.

[Brief description of drawings]

FIG. 1 is a front view showing a hydraulic excavator applied to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing the inside of a cab provided with a driver seat with an outlet.

FIG. 3 is an enlarged sectional view showing a driver's seat with an outlet.

FIG. 4 is a schematic cross-sectional view showing, in an enlarged manner, an air conditioning unit in which a driver's seat duct is connected to a driver's seat blower port when a driver's seat with an outlet is used.

5 is a perspective view showing the inside of a cab provided with a standard driver's seat in an enlarged manner from the same position as in FIG.

FIG. 6 is a schematic cross-sectional view showing an air conditioning unit, in which a lid is attached to the air outlet for the driver's seat, in an enlarged manner from the same position as in FIG. 4 when the standard driver's seat is used.

FIG. 7 is a perspective view of the inside of the cab showing a modified example according to the present invention from the same position as in FIG.

[Explanation of symbols]

1 Hydraulic excavator (construction machinery) 2 Undercarriage (car body) 3 Upper revolving structure (car body) 7 cabs 10 Driver's seat with outlet 15 seat outlet 16 Outlet for backrest 19, 19 'Driver duct 20, 20 'Regulator valve (passage area adjusting means) 21 Air conditioning unit 28 Front ventilation port 29 Foot vents 30 Back vent 33, 33 'Blower for driver's seat 34 Front duct 35 louvers 36 Foot Duct 37 Foot outlet 38,38 'Back duct 39 Back outlet 40 standard driver's seat 46 lid

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masahisa Yamanaka             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Tsuyoshi Sakyo             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory F-term (reference) 2D015 EC01                 3L011 BL02 BV01

Claims (4)

[Claims] 1. A cab provided on a vehicle body, a driver's seat provided in the cab, on which an operator is seated, and conditioned air provided in the cab, which is composed of cold air or warm air, is blown from a blower opening through a duct to the cab. In a construction machine provided with an air conditioning unit for supplying inside, the air conditioning unit or the duct is provided with a driver's seat air outlet for supplying conditioned air to the driver's seat, and the driver's seat provides a conditioned air outlet. In the case of a driver seat with an outlet provided, the driver's seat outlet and the driver's air outlet are connected via a driver's duct, and the driver's seat is provided with a conditioned air outlet. In the case of a standard driver's seat which is not installed, the construction machine is configured such that a lid is attached to the air blower opening for the driver's seat to close it. 2. The construction machine according to claim 1, wherein a passage area adjusting means for adjusting a passage area is provided at the driver's seat blower opening or the driver's seat duct. 3. The construction machine according to claim 1 or 2, wherein the driver's seat blower port is provided at a back part blower port to which the duct is connected on the back part side of the driver's seat. 4. The blower opening is a back blower opening to which the duct is connected on the back side of the driver's seat, and the driver's seat blower opening is connected to the back blower opening to provide conditioned air in the cab. The construction machine according to claim 1 or 2, wherein the construction machine is provided in a duct for a back portion that supplies the.