JP2008087530A - Air-conditioner in construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioner capable of preventing any failure of an air-conditioner body by making ingress of dirt, mud, dust and water in the air-conditioner body hard when ensuring a mounting space of the air-conditioner body below a floor, and of ensuring an arrangement space of a control valve or the like provided on a front part of the floor. <P>SOLUTION: An air-conditioner body 9 is arranged in an embedded manner in a floor 7 via a recessed tray 12 from a lower side of the floor 7 substantially below a steering seat 5 arranged on a rear side of the floor 7. An arrangement space of a control valve and a traveling lever arranged on a front side of the floor 7 can be ensured. The opening/closing type floor 7 for the maintenance of the conventional air-conditioner body 9 is also used for a bottom plate 5a of the steering seat 5 on which feet of an operator are hardly placed. Thus, ingress of earth, mud, dust and water stored on the floor 7 can be reduced thereby. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention belongs to the technical field of air conditioners in construction machines such as hydraulic excavators.

In general, some construction machines are provided with a cab so as to cover the entire cockpit. Some of the machines provided with such a cab are provided with an air conditioner for adjusting the temperature inside the cab. Such an air conditioner can be installed with a large space on the cab ceiling and the back of the cockpit when the construction machine is large and the cab itself is large. When the cab becomes smaller, it is not possible to secure a mounting space in the ceiling or the like. Therefore, conventionally, a mounting space is secured below the floor surface (floor) secured in front of the driver's seat, and the air conditioner main body is installed here. There exists what was made to arrange | position (refer patent document 1).
JP 2006-2479 A

By the way, if the installation space for the air conditioner main body is secured below the floor, it is necessary to make the floor openable for maintenance of the air conditioner main body. In such a case, a gap is easily formed in the opening and closing portion of the floor. There is a risk that soil, mud, dust and water collected on the floor may enter through the gap. As a result, there is a problem that the air conditioner main body is liable to fail.
In general, a control valve for controlling various hydraulic actuators is provided below the floor in front of the driver's seat. In this case, the air conditioner main body is arranged in this space, so the position of the control valve is arranged. There is a problem that needs to be considered separately, and here is a problem to be solved.

The present invention was created in view of the above circumstances and has been created for the purpose of solving these problems. The invention of claim 1 includes a cockpit for an operator to sit and control, In a construction machine comprising a cab for covering a seat, a floor which is a floor plate of the cab, and an air conditioner main body for adjusting indoor air, the air conditioner is provided in the cabin of the cab. Is an air conditioner for a construction machine, characterized in that an air conditioner main body disposed in the cabin of the cab is disposed in a floor and located under the cockpit.
According to a second aspect of the present invention, the cockpit seat is transformed into a seating posture in which the air conditioner body can be concealed and an exposed posture in which the front side swings upward to expose the air conditioner body as a rear fulcrum. The air conditioner for a construction machine according to claim 1, wherein the air conditioner can be used.
The invention of claim 3 is characterized in that the air conditioner comprises an inside / outside air introduction part for introducing inside / outside air into the air conditioner body on the outside in the left-right direction of the cockpit. It is an air conditioner in the described construction machine.
The invention according to claim 4 is the air conditioner according to any one of claims 1 to 3, wherein the air conditioner body is housed in a tray provided in a recessed shape on the cab floor.
In the invention of claim 5, the tray is provided with a drain hole for discharging the water that has entered the tray, and a drain hole for discharging the water discharged from the air conditioner body. 5. The air conditioner according to claim 4, wherein a hose is provided in the hole, and a check valve for preventing water from entering from the outside is provided in a lower portion of the hose. is there.

By setting it as invention of Claim 1, it can arrange | position an air-conditioner main body in the position where it is far from a foot stand and soil or water does not accumulate easily. As a result, soil, water, etc. can hardly enter the air conditioner main body. In addition, the air conditioner main body is arranged except for the floor lower side in front of the driver's seat, so that the position of the control valve can be sufficiently secured.
According to the invention of claim 2, since the maintenance of the air conditioner main body is performed only by changing the cockpit to the exposed posture, it is not necessary to open and close the floor as in the prior art, Since it is not necessary to remove devices such as cockpits, it is possible to eliminate troublesome and worrying about getting dirty.
According to the invention of claim 3, since the inside / outside air introduction section can be provided at a position that does not interfere with the provision of the cockpit and at a position close to the side wall of the cab, air supply is performed via the side wall of the cab. By providing the duct, air can be easily sucked from the outside.
By setting it as invention of Claim 4, an air conditioner can be easily arrange | positioned under a floor.
By setting it as invention of Claim 5, it can be set as the structure which water does not accumulate easily in a tray, and when water tries to permeate from the discharge end side of a hose, permeation of water can be prevented.

  Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a hydraulic excavator. The hydraulic excavator 1 includes a crawler-type lower swing body 2, an upper swing body 3 that is pivotably supported by the lower swing body, and an upper and lower swing body 3. And a front attachment 4 that is swingably provided. Furthermore, the hydraulic excavator 1 includes a control seat 5 for an operator to sit and control, and a cab 6 that is provided on the upper swing body 3 and covers the entire control seat 5. The configuration is the same as before.

  In addition to the cockpit 5, the cab 6 includes a floor 7 serving as a floor plate, and a portion of the air conditioner for adjusting the air inside the cab 6 (the inside / outside air introduction unit 8, air conditioning described later). Apparatus main body 9, distributor 10, etc.), a travel lever (not shown), a console box, and the like. Incidentally, parts of the air conditioner that are mounted outside the cab 6 include a compressor, a condenser, a pressure reducer (all not shown), and the like, which are arranged in the engine storage unit.

  The floor 7 has a control valve for controlling the supply of pressure oil to the various hydraulic actuators of the hydraulic excavator 1 on the front side (on the front side) and on the lower side (rear side) on the front side. (Not shown) and the like, and the cockpit 5 is disposed above the rear part, but an opening 7a penetrating the front and back surfaces (upper and lower surfaces) is formed at the position of the floor 7 on which the cockpit 5 is disposed. Has been.

  By the way, the cockpit 5 has a structure in which a seat portion 5b is provided on a plate-like bottom plate 5a. The bottom plate 5a covers the opening 7a from the upper side, and a rear end of the bottom seat 5 via a hinge 11 The opening 7a can be freely opened and closed. That is, as shown in FIG. 2A, the cockpit 5 covers (conceals) the upper side of the opening 7a in a sitting posture in which the operator can sit on the seat 5b. With the rear hinge 11 as a fulcrum, the front of the seat portion 5b swings upward and rearward and can be transformed into an exposed posture so that the opening 7a can be seen from the front. Incidentally, the rear surface portion 6a of the cab 6 is appropriately spaced from the back of the seat portion 5b in the sitting posture, so that the cockpit 5 can be tilted backward and transformed into an exposed posture. ing. Further, it is preferable that the cockpit 5 is configured so that it can be reclined. In such a case, if the cockpit 5 is moved upward with the backrest tilted forward, the range of the upward movement can be increased. The opening area of the opening 7a can be increased and exposed more. Incidentally, the cockpit 5 is considered so that it can be locked (fixed) in the sitting position and the exposed position.

  An upper end flange portion 12h of a recessed tray 12 having an open top is attached to the lower surface portion of the floor opening 7a, and the air conditioner body 9 is incorporated in the tray 12, It consists of an evaporator for cooling air from the inside or outside of the room introduced by the inside / outside air introduction section 8 and a heater device for heating. That is, the air conditioner main body 9 is attached to the floor 7 while being supported by a box-shaped tray 12 having an upper opening, but the tray 12 is configured such that the opening side closes the opening 7 a from the lower side of the floor 7. Accordingly, the air conditioner main body 9 is disposed substantially below the cockpit 5 and is embedded in the floor 7 so as to be substantially opposed to the opening 7a.

  Further, the air conditioner main body 9 is supported by a support piece 12 a formed upright from the bottom surface of the tray 12 and is supported without contacting the bottom surface of the tray 12. Even if it accumulates, it is difficult to soak. Moreover, the tray 12 is provided with drain hoses 12b and 12c. One drain hose 12b has an opening end that penetrates the drain hole 12k on the bottom surface of the tray 12 and is substantially flush with the bottom surface. Thus, the water that has entered the tray 12 can be discharged, but the bottom surface of the drain hose 12b is opened so that the water accumulated on the bottom surface of the tray 12 can be easily discharged. It can be inclined so that the end is at the lowest position, or a slot can be formed. The other drain hose 12c is directly provided in the air conditioner body 9 through a drain hole 12l formed on the bottom surface of the tray 12, and drains water in the air conditioner body 9 such as water droplets attached to the evaporator. It can be done. Incidentally, the drain hoses 12b, 12c are provided with a sealing material (not shown) between the through holes of the tray 12, and for example, water enters the through holes when working in a river. Is preventing. Further, as shown in FIG. 4, the drain hoses 12b and 12c are larger in diameter than the hole diameters of the upper portions 12i and 12j and are formed in the lower portions 12d and 12e formed to be thicker than the upper portions 12i and 12j. It is constructed in a state in which a smart ball (float) 13 having a property of floating less than the specific gravity is loosely fitted, and mesh-shaped so that the smart ball 13 does not fall from the open lower ends of the lower side portions 12d and 12e. Since the nets 12f and 12g are provided, when the water tries to enter from the lower ends of the drain hoses 12b and 12c, the smart ball 13 is lifted by receiving buoyancy from the water to be infiltrated, and the lower part 12d. , 12e to the upper end, thereby closing the holes of the upper portions 12i, 12j to prevent further water intrusion. Lumpur 13 is in a check valve for preventing entry of water from outside.

  Further, the air conditioner main body 9 is connected to the refrigerant hose 14 for supplying and discharging the refrigerant to the evaporator from the front of the air conditioner main body 9, so that the cockpit 5 is exposed and maintenance is performed from the opening 7a. When performing, the refrigerant | coolant hose 14 can be attached or detached easily. Although the cooling hose 14 passes through the tray 12, a sealing material (not shown) is applied to the penetrating portion so that water does not enter the tray 12.

  Here, the inside / outside air introduction unit 8 introduces air into the air conditioner main body 9 from the inside or outside of the cab 6, and is substantially leftward of the air conditioner main body 9 (rear position on the door 6 b side of the cab 6). And it is provided above the floor 7 and below the console box (not shown). In other words, the inside / outside air introduction section 8 is provided adjacent to the left side of the cockpit 5, and can thereby be arranged at a position that does not interfere with the arrangement of other members. An introduction port 15 for introduction can be provided on the side surface of the cab 6, and the filter 16 can be arranged at a position where it can be easily replaced as shown by a broken line in FIG. 1.

  The distributor 10 distributes the air discharged from the air conditioner main body 9 to blow out the air into the cabin of the cab 6 from a plurality of locations. It is provided above the floor 7 and below the console box (not shown). Incidentally, in FIG. 3 (A), 17 is a pipe provided through the floor 7 between the air conditioner main body 9 and the inside / outside air introduction portion 8, and 18 g is between the air conditioner main body 9 and the distributor 10. The pipe is provided through the floor 7.

  In the embodiment of the present invention configured as described above, the air conditioner main body 9 is positioned substantially below the cockpit 5 disposed on the rear side of the floor 7 and is embedded under the floor 7 in a buried manner. It is possible to secure a space for arranging control valves and traveling levers arranged on the front side of the floor 7, and an openable floor 7 for maintenance of the conventional air conditioner body 9 is provided with an operator's foot. The bottom plate 5a of the cockpit 5 is difficult to be placed, so that the entry of soil, mud, dust and water collected on the floor 7 can be reduced. As a result, failure of the air conditioner main body 9 can be prevented, and a control valve can be provided on the front side of the floor 7 as usual.

  Further, in this structure, an opening 7 a is formed between the air conditioner main body 9 and the cockpit 5 in the floor 7, and the bottom plate 5 a is provided on the floor 7 via a hinge 11 at the rear end. Thus, in the exposed posture in which the front side of the cockpit 5 is swung upward, the air conditioner main body 9 exposed from the opening 7a can be faced. It can be simplified. And since the refrigerant | coolant hose 14 is connected from the front of the air conditioner main body 9, this also makes maintenance easy. Further, since it is not necessary to remove devices such as the console and the cockpit 5 at the time of maintenance, it can be made troublesome and free from fear of getting dirty.

  Furthermore, the inside / outside air introduction unit 8 is provided substantially on the left side of the air conditioner main body 9, further on the upper side of the floor 7, below the console box, and on the left side of the cockpit 5. As shown in FIG. 1 by a broken line, an introduction port 15 for introducing air from the outside of the cab 6 is provided on the side surface of the cab 6. The filter 16 can be arranged at a position where it can be easily replaced.

It is a right view of a construction machine. (A) is the right view which showed the exposure attitude | position of the cockpit, (B) is the schematic which shows the state which has arrange | positioned the cockpit bottom plate, the air conditioner main body, the inside / outside air introduction part, and the distributor on the floor. (A), (B) is the partial longitudinal cross-sectional view of the cab seen from the front which shows the arrangement | positioning state of an air conditioner, respectively, and the partial longitudinal cross-sectional view of the cab seen from the right side surface. (A), (B) is a longitudinal cross-sectional view which respectively shows the lower end part vicinity of a drain hose.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 5 Pilot seat 5a Bottom plate 5b Seat part 6 Cab 7 Floor 7a Opening part 8 Inside / outside air introduction part 9 Air conditioner main body 10 Distributor 11 Hinge 12 Tray

Claims (5)

A cockpit for an operator to sit and control, a cab for covering the cockpit, a floor which is a floor plate of the cab, and an air conditioner for adjusting indoor air while being provided in the cabin of the cab In a construction machine configured with an apparatus main body,
An air conditioner in a construction machine is characterized in that an air conditioner main body disposed in a cabin of a cab is disposed under a cockpit and is embedded in a floor.   The cockpit can be transformed into a seating posture in which the air conditioner body can be concealed as a rear fulcrum and an exposed posture in which the front side swings upward to expose the air conditioner body. The air conditioner in the construction machine according to claim 1.   The air conditioner in a construction machine according to claim 1 or 2, wherein the air conditioner comprises an inside / outside air introduction part for introducing inside / outside air into the air conditioner body on the outside in the left-right direction of the cockpit. .   The air conditioner according to any one of claims 1 to 3, wherein the air conditioner body is housed in a tray provided in a recessed shape on the cab floor.   The tray is provided with a drain hole for discharging water that has entered the tray and a drain hole for discharging water discharged from the air conditioner body, and a hose is provided for these drain holes. The air conditioner according to claim 4, wherein a check valve for preventing water from entering from outside is provided at a lower portion of the hose.

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