JP4945122B2 - Construction machinery cab - Google Patents

Description

  The present invention relates to a construction machine cab mounted on a construction machine such as a wheel loader.

  Conventionally, a construction machine such as a wheel loader has a cab configured by installing a work machine operating device, a traveling control device, etc. in a room formed by surrounding a driver's seat with a wall surface having a door for getting on and off and a window. Is installed. And what installed the air-conditioning unit for the purpose of the operativity improvement and the comfort improvement in this cab has been used a lot recently.

Such an air conditioning unit is disposed, for example, between an operator seat (driver's seat) and a rear wall surface of the cab in order to secure a wide space in the cab and ensure visibility of the operator (see Patent Document 1). ).
JP-A-8-183323 (published July 16, 1996)

However, the conventional construction machine cab has the following problems.
That is, as in the cab disclosed in the above publication, in the configuration in which the air conditioning unit is disposed between the operator seat and the wall surface behind the cab, the sliding amount in the front-rear direction of the operator seat is reduced by the air conditioning unit disposed behind the operator seat. Limited. As a result, when the operator gets in and out of the cab, the driver's seat may become an obstacle and deteriorate the boarding / exiting property.

  For example, in a cab of a construction machine that has doors on both sides of the cab, such as a wheel loader, the left and right sides have nothing to improve the ease of getting on and off in normal times. There is also a case of getting on and off from the right side where a console box equipped with operation switches is arranged. In this case, the right console box as well as the driver's seat is slid in the front-rear direction to prevent a decrease in boarding / exiting performance, so that the operator seat can be slid back as much as possible when getting on / off. preferable.

  The subject of this invention is providing the cab for construction machines which can improve an operator's boarding / alighting performance conventionally.

A cab for construction machinery according to a first aspect of the present invention includes a door for entrance and exit on both the left and right sides, an operator's seat, an air conditioning unit, a console box, a space for getting on and off, and a sliding movement, which are entrances and exits for an operator operating the construction machine Space . The driver's seat is disposed inside the left and right entrance doors and is slidable in the front-rear direction. The air conditioning unit is housed in a box disposed in front of the driver's seat, and is provided to keep the indoor environment comfortable. The console box is disposed between the right passenger door and the driver's seat, and can slide in the front-rear direction independently of the driver's seat. The boarding / alighting space is formed between the driver's seat and the left boarding door. The slide movement space is formed behind the driver's seat.

  Here, the air conditioning unit is placed in a box placed in front of the driver's seat, not behind the driver's seat, which is slidable in the front-rear direction inside the passenger door that opens and closes when the operator gets on and off. It is arranged.

Here, the front-rear direction means that the direction in which the operator sits on the driver's seat and faces normal driving is the front, and the opposite side is the rear.
Usually, in a cab having an air conditioning unit inside as described above, the air conditioning unit may be arranged behind the driver's seat or the like in order to secure as much space as possible in the cab. However, in this case, since the air conditioning unit is arranged behind the driver's seat, the sliding amount in the front / rear direction of the driver's seat is limited, and there is a concern that the boarding / exiting performance may be lowered.

In the cab for construction machinery according to the present invention, the air conditioning unit that has been conventionally arranged behind the driver's seat is housed in a box arranged in front of the driver's seat.
Thereby, since the space behind the driver's seat where the air-conditioning unit is conventionally arranged can be made free, the sliding amount in the front-rear direction of the driver's seat can be made larger than the conventional one. As a result, it is possible to provide a cab for construction machines that has improved boarding / exiting performance compared to the conventional art.

Construction equipment cab according to the second aspect of the present invention is the construction machine cab according to the first inventions, further comprising an air filter mounted in the path of the air supplied from the outside to the air conditioning unit Yes. The air filter is attached at a position accessible from the outside.

Here, the air filter included in the air conditioning unit is attached at a position accessible from the outside of the cab.
Accordingly, it is possible to easily replace the air filter from the outside of the cab without performing an air filter replacement operation in a narrow space inside the cab.

Construction equipment cab according to the third invention is the first or the construction machine cab according to the second inventions, the construction machine is a wheel loader.
Here, a wheel loader is taken as a construction machine on which the cab of the present invention is mounted.

  Thereby, doors are provided on both the left and right sides, and even when there is a possibility that the operator can get on and off from either side, it is possible to ensure the boarding and exiting properties from the left and right doors.

  According to the cab for construction machines according to the present invention, it is possible to improve the boarding / alighting performance of the operator as compared with the prior art.

The construction machine cab according to an embodiment of the present invention will be described below with reference to FIGS.
Regarding the directions such as front / rear / left / right that appear in the following description, the front / rear direction when the operator is seated on the operator seat is the front / rear direction, and the direction orthogonal to the front / rear direction is the left / right direction.

[Configuration of the entire wheel loader 10]
The construction machine cab according to the present embodiment is applied to a cab 20 mounted on a wheel loader (construction machine) 10 as shown in FIG.

  The wheel loader 10 includes a vehicle body 11, a lift arm 12 attached to the front of the vehicle body, a bucket 13 attached to the tip of the lift arm 12, and four wheels that rotate while supporting the vehicle body 11 to travel the vehicle body. Tire 14 and a cab 20 mounted on the upper portion of the vehicle body 11.

The vehicle body 11 has an engine room that houses an engine (not shown), and a drive unit that drives the lift arm 12 and the bucket 13.
The lift arm 12 is an arm member for lifting the bucket 13 attached to the tip, and is driven by a lift cylinder provided therewith.

The bucket 13 is attached to the tip of the lift arm 12 and is dumped and tilted by a bucket cylinder.
The cab 20 forms a driver's cab configured by combining a plurality of steel pipes and steel plates, and is disposed slightly forward of the center portion of the vehicle body 11. The configuration of the cab 20 and the assembling method will be described in detail later.

[Structure of cab 20]
As shown in FIGS. 2 and 3, the cab 20 of the present embodiment includes an operator seat (driver's seat) 22, a steering wheel 23, an interior space formed by a plurality of column members 21 a to 21 f and a wall surface panel, A right console box (console box) 24 and a front console box (box) 26 are provided. The doors 25a and 25b for getting on and off are attached to the left and right sides when the operator (driver) sits on the operator seat 22 and faces the front.

The column members 21a to 21f are respectively disposed in the vicinity of the four corners of the cab 20 and in the vicinity of the left and right entrance / exit doors.
The operator seat 22 is a seat on which an operator (driver) who operates the wheel loader 10 sits, and is disposed near the center of the cab 20. Then, the operator seat 22 moves in the front-rear direction along a slide rail 22a (see FIG. 7) described later. A right console box 24 described later is disposed on the right side of the operator seat 22. On the other hand, no console box or the like is arranged on the left side of the operator seat 22. Therefore, the operator of the wheel loader 10 gets on and off through the entrance door 25b from the left side where a large space is normally provided.

  The steering 23 is attached so as to protrude from a front console box 26 disposed in front of the operator seat 22 and changes the traveling direction of the wheel loader 10 by rotating left and right.

  The right console box 24 is a box in which a switch panel 32 (see FIGS. 7 and 8) and the like are arranged on the upper surface, and is arranged in a space between the operator seat 22 and the right entrance door 25a. Further, the right console box 24 moves in the front-rear direction along a slide rail 24a (see FIG. 7) described later. The configuration of the right console box 24 will be described in detail later.

  The front console box 26 is a box in front of the operator seat 22 and occupying a front portion of the cab 20. The front console box 26 houses therein an air conditioning unit 26a that performs air conditioning in order to keep the interior of the cab 20 in a comfortable environment.

  As shown in FIGS. 2 and 4, the air conditioning unit 26 a is disposed slightly on the lower left side in the front console box 26. An air filter 26b attached to an intake port that supplies air to the air conditioning unit 26a is attached to the lower side of the air conditioning unit 26a. As shown in FIG. 4, the air filter 26b is accessible from the outside when the opening / closing door 26c is opened, and can be easily replaced.

  The entrance doors 25a and 25b are attached to the left and right sides of the cab 20, and are opened and closed on the outside of the cab 20 with hinges attached to the column members 21e and 21f as rotation axes.

(Right console box 24)
As shown in FIG. 8, the right console box 24 has an armrest 31, a switch panel 32, and a work implement lever 33 arranged on the upper surface.

  The armrest 31 is a flat seat for an operator to place the right arm during operation and operate the work machine lever 33 and the like, and is disposed from the rear in the right console box 24.

  The switch panel 32 includes a shift mode switch 32a for switching the operation mode, various switches 32b, a key switch 32c for starting the engine, and the like. The switches 32b are, in order from the front, working machines used during traveling stop including a traveling system switch including a T / M cut-off switching switch and an engine mode switching switch, and a boom or bucket remote positioner switch. It is arranged to be a maintenance system switch including a system switch, a fan reverse switch and the like.

  The work implement lever 33 operates the movement of the work implement attached to the front of the wheel loader 10, that is, the lift arm 12 and the bucket 13 by tilting these two levers back and forth.

<Movement of each part when getting on and off the operator>
As shown in FIG. 2, the operator seat 22 and the right console box 24 are positioned by sliding in the front-rear direction to a relatively front position so that each operator can easily operate.

  Further, when the operator gets on and off from the left entry / exit door 25b that normally gets on and off, the operator moves the operator seat 22 down to the position of the last part where the back of the operator seat 22 hits the rear wall surface. . Then, the operator gets in and out of the left entry / exit door 25b through the left empty space after sufficiently widening the space between the operator seat 22 and the steering wheel 23.

  On the other hand, when the operator gets on and off from the right entry / exit door 25a in an emergency or the like, as described above, the operator seat 22 is slid so as to be pulled down to the end, and the operator seat 22 and the right entry / exit As shown in FIGS. 5 and 6, the right console box 24 disposed between the door 25a for use is also slid rearward in the direction indicated by a two-dot chain line arrow in the drawing.

  Normally, the right console box 24 having the switch panel 32, work implement lever 33, and the like arranged on the upper surface thereof is positioned between the operator seat 22 and the right entry / exit door 25a at the time of use. It will be an obstacle when getting on and off the right entrance door 25a. However, as described above, the right console box 24 is moved to slide backward in an emergency such as when the passenger cannot get on and off the left door 25b. Thus, it is possible to secure a way for the operator from the operator seat 22 that can be fully slid to the rear to the right entry / exit door 25a, and to improve the entry / exit from the right side.

  Note that the slide of the operator seat 22 and the right console box 24 in the front-rear direction as described above is performed along slide rails 22a and 24a that are fixedly arranged with respect to the floor surface of the cab 20 as shown in FIG. Done. These slide rails 22 a and 24 a are attached along the sliding direction of the operator seat 22 and the right console box 24, that is, the front-rear direction of the cab 20.

[Features of this cab 20]
(1)
As shown in FIG. 2 and FIG. 4 and the like, the cab 20 of the present embodiment includes boarding doors 25a and 25b for an operator to get on and off, an operator seat 22, and an air conditioning unit 26a. The operator seat 22 is disposed at the center of the space formed in the cab 20 and inside the passenger doors 25a and 25b, and is slidable in the front-rear direction. The air conditioning unit 26 a is disposed in the front console box 26.

  Usually, the air conditioning unit mounted to make the cab interior comfortable is often arranged behind the operator seat for reasons such as ensuring the space in the cab as wide as possible. However, in such an arrangement, even if the operator seat is slid rearward when the operator gets on and off, the operator seat cannot be lowered sufficiently by hitting the rear wall surface of the cab, so that sufficient boarding / exiting performance cannot be maintained. There was a fear.

  In the cab 20 of the present embodiment, in order to solve the above problem, the air conditioning unit 26a that is normally arranged behind the operator seat is arranged in the front console box 26.

  As a result, when the operator gets on and off, there is no air conditioning unit 26a behind, so the operator seat 22 can be sufficiently lowered to the rear. As a result, a sufficient space between the operator seat 22 and the steering wheel 23 can be secured, and the cab 20 excellent in getting on and off can be provided.

(2)
In the cab 20 of the present embodiment, as shown in FIGS. 2 and 3, a right console box 24 that is slidable in the front-rear direction is disposed between the operator seat 22 and the right entrance door 25a.

  Thereby, the operator can arrange the right console box 24 on the upper surface of the work machine lever 33 for operating the switch panel 32 including the various switches 32b, the bucket 13 and the like on the upper surface, so that the operator can Since the operating tool can be placed on the right hand while seated, workability can be greatly improved. When getting on and off, the right console box 24 is slid to the last part, so that the boarding / alighting property from the right entrance / exit door 25a in an emergency or the like can be sufficiently secured.

(3)
In the cab 20 of this embodiment, as shown in FIG. 2 and FIG. 3, the doors 25 a and 25 b for getting on and off are attached to each of the left and right sides as viewed from the operator seat 22.

  Thus, for normal getting on and off, the left getting on / off door 25b having a wide space is used, and in the case of an emergency such as the left getting on / off door 25b not being opened, it is possible to get on and off from the right getting on / off door 25a. it can. Even when the right console box 24 is arranged on the right side of the operator seat 22, the right console box 24 is also slid rearward in the same manner as the operator seat 22, so that it can be removed from the right entrance door 25a in an emergency. It is also possible to ensure ease of getting on and off.

(4)
In the cab 20 of the present embodiment, as shown in FIG. 4, the air filter 26b is placed at a position where the air conditioning unit 26a disposed in the front console box 26 can be accessed by opening and closing the openable door 26c. Provided.

  Accordingly, when the air filter 26b is exchanged, the air filter 26b is attached to or detached from the narrow cab 20 by opening and closing the air filter 26b by opening the door 26c that is visible from the outside. Deterioration of workability can be avoided, and workability of replacement work of the air filter 26b can be greatly improved.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the said embodiment, the wheel loader 10 which mounted the cab 20 with which the doors 25a and 25b for getting on / off are attached to both right and left was mentioned as an example, and was demonstrated. However, the present invention is not limited to this.

  For example, the present invention can be applied to a cab mounted on a construction machine such as a hydraulic excavator in which a door for getting on and off is attached only on the left side. Even in this case, by applying the configuration of the present invention, it is possible to obtain the same effect as described above that a sufficient space can be secured between the left and right doors and the ease of getting on and off can be improved. it can.

(B)
In the above embodiment, the cab 20 in which the right console box 24 is disposed between the right entrance door 25a and the operator seat 22 has been described as an example. However, the present invention is not limited to this.

For example, the configuration of the cab 20 without the right console box 24 may be used.
However, it is more preferable to arrange the right console box in the cab as in the above-described embodiment because the operator can place lever switches that can be operated with the right hand while the operator is seated on the operator seat. Therefore, as in the above-described embodiment, the right console box 24 is arranged and slid backward as much as possible to provide a cab with high operability and excellent ease of getting on and off. .

(C)
In the above embodiment, the right console box 24 has been described as an example of sliding straight in the front-rear direction along the slide rail fixedly arranged on the floor surface of the cab 20. However, the present invention is not limited to this.

  For example, depending on the shape of the cab, the slide rail may be attached so as to slide and move slightly obliquely with respect to the front-rear direction. In other words, the sliding direction of the right console box is not limited as long as the operator can secure a sufficient boarding / alighting space when getting on / off.

(D)
In the above-described embodiment, an example in which the air filter 26b is disposed in the vicinity of the air conditioning unit 26a and accessible from the outside has been described. However, the present invention is not limited to this.

For example, the air filter is not limited to one that can be accessed from the outside, and may be one that is removed from the cab and exchanged.
However, the configuration as in the above embodiment is adopted in that the air filter replacement work can be significantly improved by exchanging the air filter from the outside of the cab via an opening / closing door or the like. It is more preferable.

(E)
In the above embodiment, an example in which the right console box 24 in which the work machine lever 33 and the like are arranged is arranged on the right side when viewed from the operator seat 22 has been described. However, the present invention is not limited to this.

For example, a console box provided with levers and switches for operating the work machine may be arranged on the left side when viewed from the operator seat.
Further, for example, the console box may be arranged on both sides of the operator seat, that is, between the left and right entrance doors and the operator seat.

  In any of the above cases, the console box can be slidably moved in the front-rear direction, so that it is possible to sufficiently secure the boarding / alighting ability from the left-side boarding door.

(F)
In the said embodiment, the structure of the cab which concerns on this invention was given and demonstrated with the example applied with respect to the cab mounted in a wheel loader. However, the present invention is not limited to this.

  For example, in addition to a wheel loader, the present invention can be applied to a cab mounted on another construction machine such as a bulldozer or a hydraulic excavator.

  The construction machine cab according to the present invention has the effect of improving the operator's boarding / exiting performance as compared with the conventional one. Therefore, the construction machine cab is widely applicable not only to wheel loaders but also to cabs mounted on various construction machines. .

The external view which shows the structure of the wheel loader which concerns on one Embodiment of this invention. The top view which shows the structure inside the cab mounted in the wheel loader of FIG. The perspective view which shows the structure inside the cab mounted in the wheel loader of FIG. FIG. 4 is a side sectional view showing a configuration in a front console box arranged inside the cab of FIGS. 2 and 3. The top view which shows the sliding state of the right side console box arrange | positioned inside the cab of FIG. 2 and FIG. The perspective view which shows the sliding state of the right side console box arrange | positioned inside the cab of FIG. 2 and FIG. The front view which shows the right side console box arrange | positioned inside the cab of FIG. 2, an operator seat, and the rail which slides these. The perspective view which shows the operation lever and switch which are arrange | positioned at the upper surface of the right console box arrange | positioned inside the cab of FIGS.

10 Wheel loader (construction machine)
11 Car body 12 Lift arm 13 Bucket 14 Tire 20 Cab (cab for construction machinery)
21a-21f Column member 22 Operator seat (driver's seat)
23 Steering 24 Right console box (console box)
24a Slide rail 25a Entry / exit door 25b Entry / exit door 26 Front console box (box)
26a Air conditioning unit 26b Air filter 31 Armrest 32 Switch panel 32a Shift mode switch 32b Switches 32c Key switch 33 Working machine lever

Claims (3)

Doors on both the left and right sides, which serve as entrances and exits for operators operating construction machinery,
A driver's seat that is arranged inside the entrance doors on both the left and right sides, and is slidable in the front-rear direction;
An air conditioning unit that is housed in a box arranged in front of the driver's seat and that keeps the indoor environment comfortable;
A console box that is arranged between the right door and the driver's seat and is slidable in the front-rear direction independently of the driver's seat;
A boarding space formed between the driver's seat and the left door,
A space for sliding movement formed behind the driver seat;
A cab for construction machinery. Further comprises an air filter mounted in the path of the air supplied from the outside to the air conditioning unit,
The air filter is attached at a position accessible from the outside,
The cab for construction machines according to claim 1 . The construction machine is a wheel loader,
The cab for construction machines according to claim 1 or 2 .

Images