JP2005119535A - Cab type construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent pipes 8 and 9 from being exposed to the outside, while allowing a duct cover for discharging air-conditioning air into a cab to defrost a cab windshield, in a construction machine with a cab such as a wheel loader or a hydraulic excavator. <P>SOLUTION: The pipes 8 and 9 are passed through a steering column 10 and are provided on rear surface and front surface of the steering column 10. Air conditioning air is blown from blowoff ports 16 and 18 arranged to be located on a lower side of a panel 11 provided at an upper end of the steering column 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention belongs to the technical field of cab construction machines such as wheel loaders and hydraulic excavators.

In general, some construction machines such as wheel loaders with front and rear wheels and hydraulic excavators have cab specifications (cabin specifications) that cover the pilot seat not only in the ceiling but also around the lap, and many of these are in the cab. In order to improve the working environment, air conditioners (air conditioning devices: heating devices, cooling devices, air conditioning devices, etc.) are equipped. By the way, in such a cab-type construction machine, in particular, a cab-type construction machine such as a wheel loader is provided with a large instrument panel that is long in the left-right direction like a vehicle such as a passenger car in order to improve the forward and lower visibility. However, there is no space to provide an air outlet for air conditioning from the air conditioner because a cylindrical steering column protrudes in front of the cockpit. A blower outlet is arranged on one side of the left side (for example, Patent Document 1), and a blower outlet is disposed on the upper edge of the panel cover disposed in front of the steering (for example, Patent Document 2). ) Is known.
Japanese Unexamined Patent Publication No. 7-47835 JP-A-7-3843

  However, in the case where the air outlet is arranged on one side of the cab in the left-right direction, not only the problem that the supply of conditioned air to the other side of the cab is bad and it becomes a one-effect state, but also the front of the cab There is a problem that the window cannot be defrosted. On the other hand, in the case where the air outlet is provided at the upper edge of the panel cover arranged in front of the steering, the air outlet is close to the front window. Therefore, there is a problem that not only the air conditioning is ineffective because it is far from the cockpit, but the air outlet is exposed in a hose shape at the upper end of the panel cover and the appearance is impaired. There are issues to be addressed.

The present invention has been created in order to solve these problems in view of the above circumstances, and the invention of claim 1 includes a steering column in front of a cockpit seat covered by a cab. When the air conditioner is provided in the cab type construction machine, the cab type construction machine is characterized in that the air conditioning pipe is connected to an outlet provided in the steering column through the steering column.
A second aspect of the present invention is the cab type construction machine according to the first aspect, wherein the air outlet is disposed in front of the steering column.
A third aspect of the present invention is the cab type construction machine according to the first or second aspect, wherein the air outlet is opened on a rear plate of the steering column.
A fourth aspect of the invention is a cab type construction machine according to the third aspect, characterized in that the adjustment wind blows out from the outlet toward the rear and downward.
A fifth aspect of the present invention is the cab type construction machine according to the second aspect, wherein the blowout port is located between the steering column and the cab front plate and is attached to the steering column.
A sixth aspect of the present invention is the pipe according to the second or fifth aspect, wherein the pipe is bent forward from the side extending in the left-right direction of the steering column and connected to one side in the left-right direction of the outlet. It is a cab type construction machine characterized by being.
According to a seventh aspect of the present invention, in the sixth aspect of the present invention, the air outlet has a concave groove shape that is open in the left-right direction with the upper surface opened, and the groove bottom surface has a lower inclined surface toward the connection side with the pipe. It is a characteristic cab type construction machine.
The invention according to claim 8 is the cab type construction machine according to claim 1, wherein the air outlet is arranged on a lateral side of the steering column.
A ninth aspect of the present invention is the cab type construction machine according to the first or eighth aspect, characterized in that the air outlets are arranged to protrude in the left-right direction from the left and right side portions of the steering column.
A tenth aspect of the present invention is the cab type construction machine according to the first, second, eighth or ninth aspect, wherein the blowout port is disposed below a panel board provided at an upper end portion of the steering column. .
The invention of claim 11 is the cab type construction machine according to claim 10, wherein the blow-out port partially overlaps the panel board in plan view.
According to a twelfth aspect of the present invention, in the eleventh aspect, the panel board includes a rear half portion from which the steering shaft protrudes, and a front half portion that is in front of the rear half portion and is wider than the rear half portion. The cab type construction machine is characterized in that the outlet is arranged below the front half.
According to a thirteenth aspect of the present invention, in the twelfth aspect, the left and right side edges of the front half of the panel panel are inclined so that the width between the left and right side edges becomes narrower toward the front side, and the outlet is inclined in plan view. It is a cab type construction machine characterized by being arranged below the position of the front end of the left and right side edges.
A fourteenth aspect of the present invention is the cab type construction machine according to the thirteenth aspect, characterized in that the air outlet has a left and right protruding end substantially coincident with the wide end of the front half of the panel board.

According to the first aspect of the present invention, not only the pipe is built in the steering column and is not exposed to the outside, but also the conditioned wind can be efficiently blown toward the defrost of the cab defrost window and the cockpit.
By setting it as invention of Claim 2, the efficient defrost of the cab front window in front of a steering column can be performed.
By setting it as Claim 3, air-conditioned air can be blown out toward the operator from the rear surface of the steering column, and a refreshing feeling can be given to the operator.
By setting it as invention of Claim 4, the downward blowing which faces an operator's knee part can be performed, and more efficient air-conditioning can be performed.
By setting it as invention of Claim 5, a blower outlet can be attached using a steering column.
By setting it as invention of Claim 6, arrangement | positioning of piping to a blower outlet becomes easy.
By making it the invention of claim 7, the air outlet can be stably blown out in a wide state in the left and right while the outlet is a simple one opened upward.
By setting it as invention of Claim 8, a blower outlet can be provided using a steering column.
By setting it as invention of Claim 9, an air-conditioning wind can be discharged | emitted in a uniform state from right and left with respect to a steering column.
By setting it as invention of Claim 10, a blower outlet can be attached without a panel board getting in the way.
By setting it as invention of Claim 11, a part of blower outlet can be covered with a panel board, and a front vision is not impaired by that much.
By setting it as invention of Claim 12, since a blower outlet can be covered with the panel board front half wide in the left-right direction, it can be widened to the left and right, and can improve ventilation efficiency.
According to the invention of claim 13, when the operator sitting in the cockpit is viewed, the portion covered by the front half of the panel panel is reduced and the air blowing effect is further enhanced while the blower outlet is hardly visible. be able to.
By setting it as invention of Claim 14, it can avoid that a blower outlet largely protrudes from the panel board right and left, and obstructs a front vision.

  Next, a first embodiment of the present invention will be described with reference to FIGS. Here, 1 is a rear vehicle that is configured by mounting various member devices such as an engine and hydraulic equipment (not shown), and 2 is a front vehicle that is configured by mounting various member devices such as a bucket 3 and an arm 4. The front and rear vehicles 1 and 2 are connected to each other through a connecting portion 5 so as to be swingable in the left-right direction, and form a wheel loader that is an example of a construction machine.

  The rear vehicle 1 is provided with a cab 1 a that covers the ceiling of the cockpit 6 and the front, rear, left, and right (four rounds), and an air conditioner body 7 is disposed below the cockpit 6. The air conditioner main body 7 employs a general-purpose one configured by using various member devices such as a condenser, a receiver, and an evaporator. Details of the configuration are not directly related to the present invention, and thus will be omitted. The conditioned air subjected to the air conditioning process in the air conditioner main body 7 is supplied forward via a pair of left and right pipes (duct hoses) 8 and 9, and the pipes 8 and 9 are connected to the floor of the rear frame 1b on the floor. It is the structure arrange | positioned in the state hidden (covered) by 1c.

  A steering column 10 protrudes from the front portion of the rear frame 1b in a rectangular tube shape in front of the cockpit 6 so that the lower left and right front sides of the steering column 10 can be seen from the cockpit 6. A panel board 11 is provided at the upper end of the steering column 10, a steering shaft 12 projects from the panel board 11, and a steering wheel 13 is provided at the upper end thereof. Further, operation pedals 14 and 15 are provided at the left and right lower portions of the steering column 10. A front window 1d constituting the cab 1a is provided in front of the steering column 10 in a close proximity.

  The panel board 11 has a rear half part 11a from which the steering shaft 12 protrudes and a front half part 11b having a narrow width in the left-right direction, in front of the rear half part 11a and wider in the left-right direction than the rear half part 11a. ing. Further, the left and right side edges 11c of the front half portion 11b are inclined so that the width between the left and right side edges 11c becomes narrower toward the front side.

  The pipes 8 and 9 are disposed in the steering column 10 so as to protrude upward from the floor 1c surface at the position of the steering column 10, but the upper end portion 8a of the one pipe 8 is inclined so as to be low in front and rear. In such a state, the front end (rear end) is bent in a rearward direction, and the front end (rear end) is connected to a blower outlet 16 opened in the rear surface plate 10a of the steering column 10 inclined in a front-rear rear-rear height. From the air outlet 16, air-conditioning air blows out downward and downward and hits the knee of an operator sitting on the cockpit 6.

  On the other hand, in the present embodiment, the other pipe 9 has an upper end 9a bent to the left and exposed from the left side surface of the steering column 10, and is bent back in a substantially U shape on the front side. The steering column 10 is connected to the front plate 10b of the steering column 10 at the left end of the air outlet 18 that is fixed so as to be positioned below the panel board 11. The air outlet 18 is a long groove-like body that is long in the left-right direction and has an open top surface. However, the groove bottom surface 18a of the air outlet 18 is lower on the connection side with the pipe 9 (as it is farther away from the pipe 9). It is an inclined surface, so that the conditioned air can be blown out from the connection portion of the pipe 9 to the tip.

  In the embodiment of the present invention configured as described above, the pipes 8 and 9 through which the conditioned air passes are arranged in the steering column 10, and as a result, the pipes 8 and 9 are externally exposed. The air-conditioning air is blown from the front end 8a of one pipe 8 toward the rear and lower side so as to look at the knee portion of the operator sitting on the cockpit 6, and the other pipe 9 Since the conditioned air is blown upward from the air outlet 18 disposed in front of the steering column 10, the conditioned air including the defrost of the front window 1d from the front upper side in the cab 1 and the front lower side are blown out. The air-conditioning air can be blown out together, and the favorable efficiency is improved.

  In addition, although the other outlet 18 is disposed between the steering column 10 and the cab front window 1a, it is fixed to the steering column 10 in a state of being positioned below the panel board 11, so that the cockpit 6 is hardly visible from the operator's field of view, and as a result, the work field of view is hardly obstructed.

  Furthermore, the other air outlet 18 has a simple structure having a long groove shape, but the groove bottom surface 18a has an inclined surface that becomes higher as the distance from the other pipe tip portion 9a increases. Air-conditioned air can be blown out throughout.

  In addition, this invention is not limited to the said embodiment, It can implement also like 2nd embodiment shown in FIGS. 9-15. In this configuration, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In this case, a single pipe 20 is extended from the air conditioner main body 19, and the pipe 20 protrudes upward from the floor 1 c surface at the position of the steering column 10 and the steering shaft 12 in the steering column 10. A ventilation hole is provided in the left and right side plates 10b that are arranged to pass left and right at the upper part in the steering column 10 and are arranged below the panel board 11 of the steering column 10 so as to pass the front side of the arrangement position upward. 10c is connected in communication. A duct cover (corresponding to the air outlet of the present invention) 21 protrudes on the outer side surface of the both side plates 10b so as to communicate with the vent hole 10c, and an air conditioned air outlet 21a is opened on the upper surface of the duct cover 21. Has been. Incidentally, a wind direction adjusting plate 22 is provided at the air outlet 21a so that the air blowing direction can be arbitrarily adjusted in the front-rear direction and the left-right direction toward the cockpit 6 side and the front window 1d side of the cab 1a. It has become.

  Next, the arrangement relationship between the duct cover 21 and the panel board 11 arranged above the duct cover 21 will be described. The front end edge of the duct cover 21 protrudes from the left and right side plates 10a in the left-right direction in a state substantially coincident with the front edge of the panel board 11 in a plan view, and the width between the left and right protruding ends 20a It is set so as to substantially match the width (in this embodiment, the width of the projecting short rod is slightly larger). When viewed in a plan view, the duct cover 21 is covered (covered or concealed) with the base end side overlapped with the panel board front half part 11b. The tip is exposed from the left and right side edges 11c. The duct cover 21 is hidden by the panel board 11 so that the left and right corners at the front end are slightly visible when an operator sitting on the cockpit 6 directly views the panel board 11.

  In the second embodiment of the present invention configured as described above, the pipe 20 up to the duct cover 21 is arranged in the steering column 10, and as a result, the pipe 20 is exposed. The appearance is not impaired, and the duct covers 21 are arranged on the left and right sides of the steering column 10 close to the front window 1d, so that the front window 1d is defrosted and the inside of the cab 1a is equally distributed from the left and right sides. Air conditioning can be performed in a state, and favorable efficiency is improved.

  Moreover, as a result of the duct cover 21 being arranged below the panel board 11, a part of the duct cover 21 is covered with the panel board 11 in a plan view, and the front view is not damaged accordingly. However, the duct cover 20 is arranged so as to overlap the lower part of the front panel board front half part 11b which is wide in the plan view, and the overlap position becomes narrower toward the front side of the panel board front half part 11b. As a result of being positioned on the front end side of the right and left side edges 11c inclined as described above, a portion exposed without being hidden from the front half 11b of the panel board in a plan view can be secured by the inclined edges of the left and right side edges 11c. 21 does not need to be configured to protrude significantly to the left and right, and protrudes to substantially the same position as the left and right width of the panel panel front half 11b, so that the front view is not impaired. , It will be able to discharge of efficient air-conditioning air.

It is a side view of the wheel loader of a first embodiment. It is a top view of the wheel loader. It is a front view of the cabin part. It is a side view of the cabin part. It is a top view which shows the piping state from the air conditioner main body to a blower outlet. It is a top view of the panel panel site | part. It is a rear view of the panel board part. Steering column rear plate. It is a side view of the wheel loader of a second embodiment. It is a top view of the wheel loader. It is a front view of the cabin part. It is a side view of the cabin part. It is a top view of the panel panel site | part. It is a top view of the duct cover. It is a top view which shows the piping state from the air conditioner main body to a blower outlet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear vehicle 1a Cab 2 Front vehicle 6 Pilot seat 7 Air conditioner 8 Piping 9 Piping 10 Steering column 11 Panel panel 11a Panel panel second half part 11b Panel panel front half part 11c Left and right edge of panel panel front half part 16 Air outlet 18 Air outlet

Claims (14)

  When installing an air conditioner in a cab type construction machine equipped with a steering column in front of the cockpit seat covered by the cab, the air conditioning piping was connected to the outlet provided in the steering column through the steering column. A cab-type construction machine characterized by   The cab type construction machine according to claim 1, wherein the air outlet is disposed in front of the steering column.   The cab type construction machine according to claim 1 or 2, wherein the air outlet is opened on a rear plate of the steering column.   4. The cab type construction machine according to claim 3, wherein the adjustment air is blown out downward and rearward from the outlet.   3. The cab type construction machine according to claim 2, wherein the blower outlet is located between the steering column and the cab front plate and is attached to the steering column.   6. The cab according to claim 2, wherein the pipe is connected to one side of the outlet in the left-right direction by bending forwardly extending from the side of the steering column in the left-right direction. Construction machine.   7. A cab-type construction machine according to claim 6, wherein the blower outlet has a concave groove shape which is open at the upper surface and is elongated in the left-right direction, and the groove bottom surface has a lower inclined surface toward the connection side with the pipe. .   2. The cab type construction machine according to claim 1, wherein the outlet is disposed on a lateral side of the steering column.   9. The cab-type construction machine according to claim 1, wherein the air outlets are arranged to protrude in the left-right direction from the left and right side portions of the steering column.   The cab type construction machine according to claim 1, 2, 8, or 9, wherein the air outlet is disposed below a panel board provided at an upper end portion of the steering column.   The cab type construction machine according to claim 10, wherein a part of the air outlet overlaps the panel board in plan view.   12. The panel board according to claim 11, wherein the panel board has a rear half portion from which the steering shaft protrudes, and a front half portion that is in front of the rear half portion and is wider than the rear half portion. A cab type construction machine characterized in that the outlet is arranged below the front half.   In Claim 12, the left and right side edges of the front half of the panel board are inclined so that the width between the left and right side edges becomes narrower toward the front side, and the air outlet is located at the front end position of the inclined left and right side edges in plan view. A cab type construction machine characterized by being arranged below.   14. The cab type construction machine according to claim 13, wherein the air outlet has a left and right protruding end substantially coincided with a wide end of the front half of the panel board.

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