JP2005186768A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction machine capable of reducing rising of a cloud of dust from a floor plate when air-blowing is performed by a blowing out port at the foot. <P>SOLUTION: The construction machine is provided with the floor plate 12 provided on a vehicle body; a base 11 fixed onto the floor plate 12; a driver's seat 7 installed on the base 11; an operation pedal 17 stepping-operatively provided on the floor plate 12 at a front side of the driver's seat 7; an air conditioner arranged at a rear side of the driver's seat 7 and producing air temperature-adjusted; and the blowing out port 20a at the foot for blowing the air produced by the air conditioner to operator's feet. A duct 20 for leading the air from the air conditioner to a front side of the base 11 is provided in a space formed on the floor plate 12 by the base 11 and the blowing out port 20a at the foot comprises an opening provided at a front end of the duct 20. The blowing out port 20a at the foot is obliquely upwardly directed by providing a bent part 20b on the duct 20 and thereby, air-blowing directed to an upper part of the operation pedal 17 is performed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a construction machine such as an excavator, a wheel loader, and a crane, which is provided with an improved foot outlet for blowing air generated in an operator's room by an air conditioner to an operator's feet.

  A conventional construction machine is provided with a floor board provided on the vehicle body, a base fixed on the floor board, a driver seat installed on the base board, and a stepping operation on the floor board in front of the driver seat. The driver's cabin includes an operation pedal that is provided, an air conditioner that is disposed behind the driver's seat and generates temperature-adjusted air, and a plurality of air outlets that blow out the air generated by the air conditioner.

The plurality of air outlets include a foot air outlet for blowing air to the operator's foot. In the space formed on the floor board by the base, an air guide path, that is, a duct for guiding the air generated by the air conditioner to the front of the base is provided. The foot outlet is composed of an opening provided at the front end of the duct and opens toward the operation pedal.
JP 2000-168342 A (FIGS. 2 and 5)

  Construction machines are used at work sites where earth and sand and rocks are scattered around and the environment is very dusty. In such a work site, the operator frequently goes in and out of the operator's cab in order to check the work situation, so earth and sand adhering to the operator's shoes are brought into the operator's cab. Further, in order to proceed with the work while confirming the work situation around the construction machine, the operator may carry out the work with the door of the cab open, so that scattered dust enters the cab. From these things, especially dust accumulates on the floor board in a driver's seat.

  In conventional construction machines, when air is blown through the foot outlet, the air blown out from the foot outlet flows along the floor board and accumulates on the floor board because the foot outlet opens toward the operation pedal. The dust is rolled up. As a result, the cabin is covered with dust.

  The present invention has been made in consideration of the above-described circumstances, and an object of the present invention is to provide a construction machine that can reduce the rolling-up of dust from the floor board when blowing air through the foot outlet. is there.

  In order to achieve the above-described object, the present invention provides a floor plate provided on a vehicle body, a base fixed on the floor plate, a driver seat installed on the base, and the front of the driver seat. An operation pedal provided on the floor board so as to be able to be stepped on, an air conditioner that is disposed behind the driver's seat and generates temperature-adjusted air, and a plurality of outlets that blow out air generated by the air conditioner In the construction machine provided in the cab, the plurality of air outlets include a foot air outlet for blowing air to an operator's feet, and are generated by the air conditioner in a space formed on the floor board by the base. An air guide passage that guides the generated air to the front of the base is provided, and the foot outlet includes an opening provided at a front end of the air guide passage, and includes the front end provided with the foot outlet. At least part of the air duct Upwardly of the operating pedal as blowing takes place, characterized by being formed obliquely upward.

  In the present invention configured as described above, a part of the air guide path including the front end provided with the foot outlet is formed obliquely upward so that the air is blown toward the upper side of the operation pedal. As a result, the amount of air flowing along the floor plate out of the amount of air blown from the foot outlet can be reduced, particularly the amount of air flowing below the operation pedal where dust is likely to accumulate. Therefore, the rolling-up of the dust from a floor board at the time of ventilating with a foot blower outlet can be reduced.

  Moreover, this invention set the elevation angle with respect to the said floor board of the said blower outlet in the said invention in the range of 10-20 degrees, It is characterized by the above-mentioned.

  Moreover, the present invention is characterized in that, in the above-mentioned invention, the air guide path is composed of a duct, and the foot outlet is inclined upward by bending a front end portion of the duct.

  Moreover, the present invention is characterized in that, in the above invention, a drain outlet is provided at the bottom of the air guide passage.

  As described above, according to the present invention, it is possible to reduce the amount of air flowing along the floor plate out of the amount of air blown from the foot outlet, particularly the amount of air flowing below the operation pedal where dust is likely to accumulate. . Therefore, the rolling-up of the dust from a floor board at the time of ventilating with a foot blower outlet can be reduced. As a result, it is possible to contribute to preventing the cab from being covered with dust.

  Hereinafter, an embodiment of a construction machine of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing the appearance of an embodiment of the construction machine of the present invention, FIG. 2 is a front view showing a driver's seat and surrounding equipment provided in the cab shown in FIG. 1, and FIG. 1 is a side view showing a driver's seat and its surrounding equipment shown in FIG. 1, FIG. 4 is a perspective view showing an air conditioner, an outlet and a duct provided in the driver's cab, and FIG. 5 is a side view of FIG. FIG. 6 is a plan view of FIG.

  The present embodiment is a construction machine, for example, a crawler excavator 1 shown in FIG. The excavator 1 travels on the excavator 1 by rotating the crawler belt, the revolving body 3 in which the front work machine 2 is rotatably connected, and the cab 4 and the machine room 5 are installed. The traveling body 6 is provided.

  As shown in FIGS. 4 to 6, the cab 4 has a box shape, a left side wall 40 provided with a door 40a (see FIG. 1), a right side wall 41 provided with windows 41a and 41b, and a front side. The window 42, the rear wall 43 provided with the rear window 43 a, the ceiling 44, and the floor board 12 are roughly configured.

  In this embodiment, as shown in FIGS. 2 and 3, in the cab 4, a base 11 fixed on the floor plate 12, a driver seat 7 installed on the base 11, and the driver seat 7 An operation pedal 17 provided on the front floor plate 12 so as to be able to be stepped on is provided, and a travel operation lever 15 provided near the operation pedal 17 is provided.

  Moreover, in the cab 4, as shown in FIGS. 4-6, the air conditioner 50 which is arrange | positioned at the back of the driver's seat 7, and produces | generates the temperature-controlled air, and the air produced | generated by this air conditioner 50 are blown out. A plurality of air outlets are provided.

  As the plurality of air outlets, for example, an air outlet 51a provided at the front right of the driver's seat 7 for blowing air to the upper body of the operator, and behind the driver's seat 7 for preventing fogging of the rear window 43a of the driver's cab 4 The air outlet 51b provided, the air outlet 51c provided near the lower portion of the front window 42 to prevent the fogging of the front window 42a, and further provided below the driver's seat 7 to blow air to the operator's feet. There is a foot outlet 20a.

  Ducts 52 and 53 and a foot duct 20 are provided between each of the air outlets 51a and 51c and the foot air outlet 20a and the air conditioner 50. The outlet 51b is formed in the middle of the duct 52. The duct 52 extends in the front-rear direction at the lower right of the driver's seat 7, and is formed by bending the front part upward in three steps. The duct 53 is erected on the right side of the driver's seat 7 and is formed to bend obliquely rearward from a height position that does not obstruct the right side view.

  As shown in FIGS. 2 and 3, the base 11 has a gate shape in front view in order to form a space 21 in which the foot duct 20 is disposed below the driver's seat 7. Moreover, the base 11 has the collar part 11c which spreads laterally at each edge part of the both-sides part 11b. Each flange portion 11c is fastened to the floor plate 12 with bolts, and thereby the base 11 is fixed to the floor plate 12.

  A front / rear position adjusting mechanism 10 for adjusting the position of the driver's seat 7 in the front / rear direction is provided on the upper portion 11a of the base 11. The front / rear position adjusting mechanism 10 is fixed to the upper portion 11a of the base 11 and extends in the front / rear direction (not shown), a slider (not shown) that slides while being guided by the rail, and slides of the slider. A lock mechanism (not shown) for locking and a lever 10a for releasing the lock by the lock mechanism are provided.

  A movable table 9 is disposed above the base 11. The movable table 9 is movable in the front-rear direction by a front-rear position adjustment mechanism unit 10. In other words, the slider of the front / rear position adjusting unit 10 is attached to the lower part of the movable base 9 so that the movable base 9 moves back and forth along the rail. An upper / lower position adjusting mechanism 8 for adjusting the vertical position of the driver's seat 7 is attached to the upper part of the movable base 9. The vertical position adjusting mechanism 8 is a link mechanism (not shown) that expands and contracts in the vertical direction, a lock mechanism (not shown) that locks the extension of the link mechanism, and unlocks by the lock mechanism. Lever 8a.

  A driver's seat 7 is attached to the upper part of the vertical position adjusting mechanism 8. Further, brackets 9a are provided on both sides of the movable base 9, and a console 14 including a front operation lever 15 for operating the front work machine 2 is attached to each bracket 9a. In addition, armrests 13 are attached to both sides of the driver's seat 7 via brackets 18.

  Since this embodiment has a feature in the foot duct 20, the foot duct 20 will be described in detail below.

  As shown in FIGS. 2 and 3, the foot duct 20 is an air guide path that guides the air generated by the air conditioner 50 to the front of the base 12 in a space 21 formed on the floor plate 12 by the base 11. . The foot outlet 20 a includes an opening provided at the front end of the foot duct 20.

  Further, the foot duct 20 is fastened to the floor board 12 in a state where the bracket 20e provided on both sides thereof is floated to a predetermined height from the floor board 12 by fastening the bracket 20e to the floor board 12 in the space 21 formed by the base 11. It is fixed.

  In addition, a part of the foot duct 20 including the front end provided with the foot outlet 20 a is formed obliquely upward so that air is blown toward the upper side of the operation pedal 17. That is, by forming the bent portion 20b for directing the front end portion of the foot duct 20 obliquely upward, the foot outlet 20a is inclined upward. The elevation angle θ of the foot outlet 20a with respect to the floor plate 12, that is, the angle θ formed by the imaginary line 22 orthogonal to the opening surface of the foot outlet 20a and the imaginary line 23 parallel to the floor plate 12 is 10 ° to 20 °. For example, the angle is set to 15 °.

  In addition, a recess 20c that inclines so as to become deeper toward the center and a drain port 20d that penetrates the floor plate 12 at the center of the recess 20c are provided at the lower portion of the foot duct 20. Although not shown, the drain port 20d communicates with the outside of the excavator 1.

  In the present embodiment configured as described above, when the ventilation is performed by the foot duct 20, the elevation angle θ of the foot air outlet 20a with respect to the floor plate 12 is set in the range of 10 ° to 20 °. The blown air flows diagonally upward toward a height position that is equal to or higher than the height of the upper end portion of the operation pedal 17 and below the calf of the operator 30.

  Further, in this embodiment, when the floor board 12 is washed away with water, even if water enters the foot duct 20 from the foot outlet 20a, the water is guided to the drain port 20d by the recess 20c, and the excavator from the drain port 20d. 1 is discharged outside.

  According to this embodiment, the following effects can be obtained.

  In this embodiment, since the elevation angle θ of the foot outlet 20a with respect to the floor plate 12 is set in the range of 10 ° to 20 °, the air blown from the foot outlet 20a flows obliquely upward, and from the foot outlet 20a. Of the blown-out air volume, the air volume flowing along the floor plate 12, particularly the air volume flowing below the operation pedal 17 where dust is likely to accumulate, can be reduced. Thereby, the rolling-up of the dust from the floor board 12 at the time of ventilating by the foot outlet 20a is reduced. As a result, it is possible to contribute to preventing the inside of the cab 4 from being covered with dust.

  Moreover, in this embodiment, by forming the bent part 20b in the foot duct 20, the foot outlet 20a is directed obliquely upward. This eliminates the need for the number of parts and the number of assembling steps, compared to the case where another part such as a grill is provided in the foot duct 20 and the wind direction is set obliquely upward.

  Moreover, in this embodiment, the water which entered into the foot duct 20 from the foot outlet 20a can be discharged out of the shovel 1 by the recessed portion 20c and the drain port 20d. Thereby, it is possible to prevent water from collecting in the foot duct 20 without providing a grill or a damper at the foot outlet 20a.

  The above-described embodiment is a crawler excavator 1, but the present invention is not limited to this. In other words, in order to dispose the foot duct below the driver's seat, any construction machine including a base that forms a space with the floor board may be used. For example, a wheel loader or a crane may be used.

  In addition, although an example in which a part of the foot duct 20 is formed obliquely upward has been described, the same action and effect as described above can be achieved even if the entire foot duct 20 is formed obliquely upward.

It is a side view which shows the external appearance of one Embodiment of the construction machine of this invention. It is a front view which shows the driver's seat provided in the cab shown in FIG. 1, and the surrounding equipment. It is a side view which shows the driver's seat provided in the cab shown in FIG. 1, and the surrounding equipment. It is a perspective view which shows the air conditioner, the blower outlet, and duct which are provided in a driver's cab. FIG. 5 is a side view of FIG. 4. FIG. 5 is a plan view of FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crawler type excavator 3 Revolving body 4 Driver's cab 7 Driver's seat 8 Vertical adjustment mechanism part 9 Movable stand 10 Front and rear position adjustment mechanism part 11 Base 12 Floor board 17 Operation pedal 20 Foot duct 20a Foot outlet 20b Bending part 20c Recess 20b Drain outlet 50 air conditioner 51a air outlet 51b air outlet 51c air outlet

Claims (4)

A floor board provided on the vehicle body, a base fixed on the floor board, a driver seat installed on the base board, and an operation pedal provided on the floor board in front of the driver seat so as to be able to perform a stepping operation; In a construction machine comprising an air conditioner that is disposed behind the driver's seat and generates temperature-adjusted air, and a plurality of outlets that blow out the air generated by the air conditioner, in the driver's cabin,
The plurality of air outlets include a foot air outlet for blowing air to an operator's foot,
In the space formed on the floor board by the base, an air guide path for guiding the air generated by the air conditioner to the front of the base is provided.
The foot outlet is composed of an opening provided at the front end of the air guide passage,
A construction machine characterized in that at least a part of the air guide path including the front end provided with the foot outlet is formed so as to be obliquely upward so that air is blown above the operation pedal.   The construction machine according to claim 1, wherein an elevation angle of the air outlet with respect to the floor board is set in a range of 10 to 20 °.   The construction machine according to claim 1 or 2, wherein the air guide path includes a duct, and the foot outlet is inclined upward by bending a front end portion of the duct. The construction machine according to any one of claims 1 to 3, wherein a drain outlet is provided at a bottom portion of the air guide path.

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