JP7613233B2 - Construction machinery operator's floor structure - Google Patents

Description

The present invention relates to a driver's seat floor structure for construction machinery in which hydraulic equipment, electrical components, and other objects are placed under the floor plate at the driver's feet.

Conventionally, construction machines have been known in which hydraulic equipment, electrical components, and other objects are arranged below the driver's seat. For example, the construction machine disclosed in Patent Document 1 has hydraulic equipment arranged below the floor plate at the driver's feet, and the hydraulic equipment adjusts the hydraulic pressure of the pressurized oil pumped from the hydraulic pump and supplies the adjusted pressurized oil to a hydraulic actuator in response to pedal operation by the operator. These hydraulic devices require regular maintenance to maintain performance, and this maintenance is generally performed through a work window formed in the floor plate at the driver's feet.

JP 2013-87461 A

From the viewpoint of improving the workability of the worker during the maintenance work of the hydraulic equipment as described above, it is desirable to position the entire area of the hydraulic equipment to be maintained so that it corresponds to the work window. However, due to layout constraints of each equipment, it may be necessary to arrange the hydraulic equipment to be maintained so that some components do not correspond to the work window. In this case, if the maintenance work is performed through the above-mentioned work window, there may be areas of the hydraulic equipment to be maintained that are poorly visible, and it may not be possible to secure sufficient space for the worker to perform the maintenance work (space for the worker to insert his/her hands and space for moving the maintenance tools), which may prevent the worker from efficiently performing the maintenance work on the hydraulic equipment.

To address this issue, it is conceivable that the area of the work window in the floor plate could be enlarged compared to conventional methods, thereby improving workability for workers.

However, simply expanding the area of the working window in the floor plate would reduce the rigidity of the floor plate, and for example, every time an operating pedal attached to the floor plate is operated, the area around the operating pedal on the floor plate would repeatedly move up and down, reducing operability. Furthermore, repeated use of the operating pedal could cause damage or deformation to the area around the operating pedal on the floor plate. Furthermore, vibrations could occur due to the operation of the internal combustion engine, etc., which could have an adverse effect on the operating device.

The present invention was made in consideration of these points, and its purpose is to provide a highly rigid driver's seat floor structure for construction machinery that can improve workability when working on objects placed under the floor plate.

To achieve the above objective, the present invention is characterized by its ingenuity in increasing the rigidity of the floor plate while widening the work opening area in the floor plate.

Specifically, the target is a driver's seat floor structure for construction machinery in which a work window section that allows access to objects placed below the driver's seat is formed in the floor plate at the feet of the driver's seat, and the following solutions have been implemented.

In other words, in the first invention, the floor plate is provided with a work recess that penetrates vertically and is concave in plan view and communicates with the work window, and a cover member that covers and closes the work recess from above, and a protrusion that protrudes downward is provided on the part of the opening periphery of the work window of the floor plate that is continuous with the work recess, and a reinforcing wall that protrudes from the back surface of the cover member and overlaps horizontally with the protrusion when the work recess is covered with the cover member.

The second invention is the first invention, characterized in that a reinforcing rib is provided on the periphery of the opening of the working recess so as to protrude downward and extend along the periphery of the opening.

The third invention is characterized in that in the first or second invention, some components of the object to be placed are attached to the back surface of the cover member.

In the fourth invention, in any one of the first to third inventions, the construction machine is provided with a first operating member that operates the traveling operation of the construction machine and a second operating member that operates the operation other than the traveling operation of the construction machine, the first operating member is attached to an area of the floor plate other than the working window portion and the working recess, and the second operating member is attached to the cover member.

The fifth invention is characterized in that in any one of the first to fourth inventions, the object to be placed is equipped with a control valve capable of controlling the supply of hydraulic oil to the hydraulic actuator of the construction machine, and the control valve is placed at a position corresponding to the work window portion.

The sixth invention is the fifth invention, characterized in that the control valve is disposed at a position corresponding to the communication portion of the working recess with the working window portion.

In the first invention, since the work recess is provided continuously with the work window, the area accessible to the worker when working on the object located below the floor plate is wider than when only the work window is provided. Therefore, the worker can easily access some components in the object that do not correspond to the work window and the outer periphery of the object using the work recess, improving the worker's workability. In addition, since the opening periphery of the work recess is shaped such that a part of the opening periphery of the work window protrudes outward, the opening area in the floor plate where the worker works on the object does not become too wide, and the reduction in the rigidity of the floor plate due to the expansion of the area of the opening area where the worker works can be suppressed. Furthermore, the protrusion provided along the opening periphery of the work window makes the cross section of the floor plate around the protrusion have an L-shape. Therefore, the section modulus around the work window in the floor plate is high, so that the rigidity of the continuous part with the work recess in the work window of the floor plate can be increased and deformation of the part can be suppressed. In addition, in the cover member, the main body portion of the cover member and the reinforcing wall portion form a cross-sectional shape around the reinforcing wall portion. Therefore, the section modulus around the reinforcing wall portion of the cover member is high, so the rigidity of the entire cover member can be increased, and deformation around the floor plate to which the cover member is attached can be effectively suppressed. When the cover member is attached to the floor plate, the main body portion of the cover member overlaps the portion around the work recess of the floor plate, increasing the thickness of the area and increasing the rigidity, and the reinforcing wall portion of the cover member overlaps the protrusion of the floor plate, increasing the thickness of the area and increasing the rigidity. Therefore, deformation of the continuous portion of the work window portion and the work recess of the floor plate can be further suppressed, and the decrease in the rigidity of the floor plate due to the expansion of the area of the opening area where the worker works on the placed object can be effectively suppressed.

In the second invention, the cross section of the floor plate around the work recess is L-shaped, so the section modulus of the floor plate around the work recess is high. This increases the rigidity of the floor plate around the work recess, and more effectively suppresses the decrease in rigidity of the floor plate that accompanies an increase in the area of the opening region where the worker works on the placed object.

In the third invention, when the cover member is removed from the floor plate when working on the object to be placed, some of the components of the object to be placed that are attached to the back surface of the cover member are moved from the area under the driver's seat together with the cover member. Therefore, the time spent on work can be reduced compared to when the cover member is removed and then the some of the components of the object to be placed are moved separately from the area under the driver's seat to perform the work. In addition, because the removed cover member and some of the components of the object to be placed are in a single unit, it is possible to prevent some of the components of the object to be placed from being lost compared to when the removed cover member and some of the components of the object to be placed are stored separately.

In the fourth invention, the first operating member of the construction machine, which is operated frequently and requires excessive operating force by the worker, is disposed in an area of high rigidity on the floor plate, so that even if the worker operates the machine frequently or with excessive operating force, the area around the first operating member on the floor plate is not deformed, resulting in a comfortable driver's seat floor structure. On the other hand, the second operating member of the construction machine, which is operated less frequently and requires less operating force, is attached to a cover member that covers a work recess with a narrow opening area, so deformation of the cover member due to the operation of the second operating member by the worker can be minimized. In this way, a floor plate that is less likely to deform even when the worker operates various operations on the construction machine can be achieved.

In the fifth invention, when working on the control valve, the worker can easily access most areas of the control valve through the working window. Therefore, the worker can easily work on the control valve through the working window, improving the workability of the control valve.

In the sixth invention, when the cover member is removed from the floor plate, the working opening area formed in the floor plate becomes wider around the control valve, allowing the worker to easily work on the control valve, thereby improving the efficiency with which the worker works on the control valve.

1 is a schematic perspective view of a canopy-type hydraulic excavator to which a driver's seat floor structure according to an embodiment of the present invention is applied. FIG. 2 is a view taken along the arrow II in FIG. FIG. 2 is a plan view of a driver's seat floor of the hydraulic excavator according to the embodiment of the present invention, showing a state in which a cover panel of the floor plate has been removed. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 2 is a perspective view of a floor plate of the hydraulic excavator according to the embodiment of the present invention, viewed from the back side. FIG. 2 is a plan view of a driver's seat floor of the hydraulic excavator according to the embodiment of the present invention, showing a state in which a cover member of the floor plate has been removed. FIG. 2 is a perspective view of a driver's seat floor of the hydraulic excavator according to the embodiment of the present invention, showing a state in which a cover member of the floor plate is being removed.

The following describes in detail an embodiment of the present invention with reference to the drawings. Note that the following description of the preferred embodiment is essentially merely exemplary.

Figure 1 shows a hydraulic excavator 1 (construction machinery) to which a driver's seat floor structure according to an embodiment of the present invention is applied. The hydraulic excavator 1 is primarily used for excavation work and is equipped with a crawler-type lower traveling body 2 and an upper rotating body 3 attached above the lower traveling body 2 via a rotating mechanism, and the upper rotating body 3 is capable of rotating around a rotating axis that extends in the vertical direction.

The upper rotating body 3 is equipped with an upper frame 4 that is a thick, roughly rectangular plate. An excavation attachment 5 is provided on the front side of the vehicle on one side in the width direction of the upper frame 4, and the excavation attachment 5 is equipped with a boom 5a, an arm 5b, and a bucket 5c in that order from the base end.

On the other hand, a canopy 6 is provided on the upper part of the other widthwise side of the upper frame 4 to protect the driver's seat 7 in which the occupant of the hydraulic excavator 1 sits.

As shown in Figures 2 and 3, a floor plate 8 that is approximately rectangular in plan view and extends in the vehicle width direction is provided at a position on the upper frame 4 that corresponds to the feet of the driver's seat 7, and hydraulic equipment 10 (object to be placed) is disposed below the floor plate 8.

The floor plate 8 has a plate body 9 that is generally rectangular in shape when viewed from above, and the plate body 9 has a work window 9a and a work recess 9b that allow access to the hydraulic equipment 10, as shown in FIG. 6.

As shown in FIG. 3, the work window 9a is connected to the interior of the upper frame 4 at a location on the floor plate 8 toward the rear of the vehicle, and has a shape that extends in a generally band-like shape in the vehicle width direction in a plan view.

As shown in Figures 4 and 5, the periphery of the opening of the work window 9a at the front of the vehicle is provided with a protrusion 9c that protrudes straight downward and extends linearly in the vehicle width direction, and the protrusion 9c is formed by bending downward the part that forms the opening of the work window 9a.

As shown in FIG. 6, the work recess 9b is formed on the floor plate 8 at the front of the vehicle and on the left side in the vehicle width direction, penetrates vertically, and is concave in plan view and communicates with the work window 9a.

As shown in Figures 4 and 5, a reinforcing rib 9d is provided on the periphery of the opening of the working recess 9b, protruding straight downward and extending along the periphery of the opening of the working recess 9b, and the reinforcing rib 9d is positioned so that it extends continuously into the working window portion 9a.

That is, the protrusion 9c of the working window 9a is provided in a portion that is continuous with the working recess 9b on the periphery of the opening of the working window 9a, and the protrusion amount of the protrusion 9c and the protrusion amount of the reinforcing rib 9d are approximately the same.

As shown in Figures 2 and 3, the floor plate 8 includes a cover panel 11 that is a substantially rectangular plate and covers the working window 9a, and a cover member 12 that is a substantially trapezoid and covers the working recess 9b. The cover panel 11 and the cover member 12 are attached to and detached from the floor plate 8 to open and close the working window 9a and the working recess 9b, respectively.

A reinforcing wall portion 12a that protrudes straight downward and extends linearly in the vehicle width direction is provided on the rear edge of the vehicle on the back surface of the cover member 12, and the reinforcing wall portion 12a is arranged to overlap horizontally with the protruding portion 9c when the cover member 12 covers the working recess 9b.

As shown in FIG. 2, a driving operation unit 13 (first operating member) is disposed in the center of the floor plate 8 on the front side of the vehicle. The driving operation unit 13 includes a pair of driving operation levers 13a extending upward and a pair of central operation pedals 13b fixed to the lower part of each of the driving operation levers 13a and capable of operating each of the driving operation levers 13a.

In other words, the travel operation unit 13 is attached to the area of the plate body 9 excluding the work window portion 9a and the work recess portion 9b, and is capable of operating the travel operation of the hydraulic excavator 1.

In addition, a right-side operation pedal 15 that can swing the entire excavation attachment 5 left and right is provided on the right side of the floor plate 8 at the front of the vehicle.

Furthermore, a left-side operating pedal 16 (second operating member) capable of operating a hydraulic actuator separately provided on the excavation attachment 5 is fixed to the surface of the cover member 12.

In other words, the left operating pedal 16 can be used to control all operations except for the traveling operation of the hydraulic excavator 1.

As shown in FIG. 6, the hydraulic equipment 10 includes a multiple control valve 17, which is an assembly of multiple control valves that can control the supply of hydraulic oil to the hydraulic actuators of the hydraulic excavator 1, and multiple pipes 18 are connected to the control valve 17.

The control valve 17 and each pipe 18 are housed inside the upper frame 4, and the control valve 17 is arranged in an orientation that extends in the fore-and-aft direction of the vehicle in the left region of the vehicle width direction inside the upper frame 4.

That is, the control valve 17 is disposed at a position corresponding to the working window portion 9a and at a position corresponding to the communicating portion of the working recess 9b with the working window portion 9a, and is disposed so that a part of the vehicle front area of the control valve 17 is located in the working recess 9b. Therefore, when performing work on the control valve 17, the worker can easily access most of the area of the control valve 17 through the working window portion 9a, and can easily perform work on the control valve 17 through the working window portion 9a, thereby improving the workability of the control valve 17.

In addition, when the cover member 12 is removed from the floor plate 8, the opening area for work formed in the floor plate 8 becomes wider around the control valve 17, making it easier for workers to work on the control valve 17, thereby improving the efficiency with which workers can work on the control valve 17.

The hydraulic equipment 10 is equipped with a remote control valve 19 that operates the control valve 17 so that the control valve 17 supplies pressure oil to each hydraulic actuator based on pedal operation of the left operating pedal 16. The remote control valve 19 is fixed to the back surface of the cover member 12 as shown in Figures 4 and 5.

That is, some of the components of the hydraulic equipment 10 are attached to the back surface of the cover member 12. Therefore, when the cover member 12 is removed from the plate body 9, the remote control valve 19 moves from the inside to the outside of the upper frame 4 together with the cover member 12, as shown in FIG. 7. Therefore, the time required for maintenance work can be reduced compared to when the cover member 12 is removed and then the remote control valve 19 of the hydraulic equipment 10 is moved from the area below the driver's seat 7 separately to perform the maintenance work.

In addition, since the removed cover member 12 and the remote control valve 19 are in a single unit, the remote control valve 19 is less likely to be lost than if the removed cover member 12 and the remote control valve 19 were stored separately. Note that the control valve 17 is not shown in Figure 7 for the sake of convenience.

As described above, according to the embodiment of the present invention, since the work recess 9b is provided contiguous with the work window 9a, the area accessible to the worker when working on the hydraulic equipment 10 located below the floor plate 8 is wider than when only the work window 9a is available. Therefore, the worker can use the work recess 9b to easily access some components of the hydraulic equipment 10 that do not correspond to the work window 9a (e.g., the remote control valve 19) and the outer periphery of the hydraulic equipment 10, improving the worker's workability.

In addition, the opening periphery of the work recess 9b is shaped so that part of the opening periphery of the work window 9a protrudes outward, so that the opening area in the floor plate 8 where the worker works on the hydraulic equipment 10 does not become unnecessarily large, and the decrease in the rigidity of the floor plate 8 that would otherwise be caused by the increase in the area of the opening area where the worker works can be suppressed.

Furthermore, the protrusion 9c provided along the opening periphery of the working window 9a causes the cross section of the floor plate 8 around the protrusion 9c to be L-shaped. This increases the section modulus around the working window 9a in the floor plate 8, thereby increasing the rigidity of the connection between the working window 9a of the floor plate 8 and the working recess 9b, thereby suppressing deformation of that part.

In addition, the cross section of the cover member 12 around the reinforcing wall portion 12a is formed in a cross-sectional shape by the main body of the cover member 12 and the reinforcing wall portion 12a. Therefore, the section modulus of the cover member 12 around the reinforcing wall portion 12a is high, so the rigidity of the entire cover member 12 can be increased, and deformation around the floor plate 8 to which the cover member 12 is attached can be effectively suppressed.

When the cover member 12 is attached to the floor plate 8, the main body of the cover member 12 overlaps the area around the work recess 9b of the floor plate 8, increasing the thickness of that area and enhancing rigidity, and the reinforcing wall portion 12a of the cover member 12 overlaps the protrusion portion 9c of the floor plate 8, increasing the thickness of that area and enhancing rigidity. This makes it possible to further suppress deformation of the portion of the floor plate 8 where the work window portion 9a connects to the work recess 9b, and effectively suppresses a decrease in the rigidity of the floor plate 8 that accompanies an increase in the area of the opening where the worker works on the hydraulic equipment 10.

In addition, reinforcing ribs 9d are provided around the opening edge of the working recess 9b, so that the cross section of the floor plate 8 around the working recess 9b is L-shaped, and the section modulus of the floor plate 8 around the working recess 9b is high. This increases the rigidity of the floor plate 8 around the working recess 9b, and more effectively suppresses the decrease in rigidity of the floor plate 8 that accompanies the expansion of the area of the opening region where the worker works on the hydraulic equipment 10.

In addition, the traveling operation unit 13 of the hydraulic excavator 1, which is operated frequently and the operating force by the operator is likely to be excessive, is disposed in a highly rigid area of the floor plate 8 where the working window portion 9a and the working recess 9b are not formed. Therefore, even if the operator operates the hydraulic excavator 1 frequently or with excessive operating force, the area around the traveling operation unit 13 on the floor plate 8 is not deformed, improving the usability. On the other hand, the left side operation pedal 16 of the hydraulic excavator 1, which is operated infrequently and with a small operating force, is attached to the cover member 12 that covers the working recess 9b with a narrow opening area, so that deformation of the cover member 12 due to the operation of the left side operation pedal 16 by the operator can be minimized. In this way, the floor plate 8 can be made less likely to deform even when the operator operates various operations on the hydraulic excavator 1.

In the embodiment of the present invention, maintenance work is performed on the hydraulic equipment 10 arranged below the floor plate 8 using the work window 9a and the work recess 9b. However, even if other equipment such as electrical components are arranged below the floor plate 8, work can be performed on the equipment arranged below the floor plate 8 via the work window 9a and the work recess 9b.

In addition, in the embodiment of the present invention, the working recess 9b is formed at a position on the left side of the plate body 9 in the vehicle width direction at the front of the vehicle, but this is not limited thereto, and it may be formed at another position as long as it is connected to the working window portion 9a.

In addition, in the embodiment of the present invention, a remote control valve 19 is attached to the back surface of the cover member 12 as a component of the hydraulic equipment 10, but this is not limited thereto, and other components of the hydraulic equipment 10 may be attached to the cover member 12.

The driver's seat floor structure according to the embodiment of the present invention can also be applied to driver's seat floor structures of construction machines other than the hydraulic excavator 1.

The present invention is suitable for the driver's seat floor structure of construction machinery in which hydraulic equipment, electrical components, and other objects are placed below the floor plate at the driver's feet.

1. Hydraulic excavator (construction machinery)
7 Driver's seat 8 Floor plate 9a Working window 9b Working recess 9c Protrusion 9d Reinforcement rib 10 Hydraulic equipment (object to be placed)
12 Cover member 12a Reinforcement wall portion 13 Travel operation unit (first operation member)
16 Left side operation pedal (second operation member)
17 Control valve 19 Remote control valve (a component part of the object to be placed)

Claims (6)

A driver's seat floor structure for a construction machine, in which a work window portion that allows access to an object placed under the driver's seat is formed in a floor plate at the feet of the driver's seat,
The floor plate includes a work recess that is vertically penetrating and communicates with the work window portion and has a concave shape in a plan view, and a cover member that covers and closes the work recess from above,
A protrusion protruding downward is provided on a portion of the opening periphery of the work window portion of the floor plate that is continuous with the work recess,
A driver's seat floor structure for a construction machine, characterized in that a reinforcing wall portion is protruded from the back surface of the cover member so as to overlap horizontally with the protrusion portion when the cover member is covering the work recess. In the driver's seat floor structure for a construction machine according to claim 1,
A floor structure for a driver's seat of a construction machine, characterized in that a reinforcing rib is provided on the periphery of the opening of the work recess so as to extend downward along the periphery of the opening. The construction machine driver's seat floor structure according to claim 1 or 2,
A driver's seat floor structure for a construction machine, characterized in that some components of the object to be placed are attached to the back surface of the cover member. In the driver's seat floor structure for a construction machine according to any one of claims 1 to 3,
The construction machine includes a first operating member that operates a traveling operation of the construction machine, and a second operating member that operates an operation other than the traveling operation of the construction machine,
The first operating member is attached to an area of the floor plate excluding the work window portion and the work recess portion,
A driver's seat floor structure for a construction machine, characterized in that the second operating member is attached to the cover member. In the construction machine driver's seat floor structure according to any one of claims 1 to 4,
The object to be placed includes a control valve capable of controlling the supply of hydraulic oil to a hydraulic actuator of the construction machine,
A construction machine driver's seat floor structure, wherein the control valve is disposed at a position corresponding to the work window portion. The construction machine driver's seat floor structure according to claim 5,
13. A construction machine driver's seat floor structure, comprising: a control valve disposed at a position corresponding to a communication portion of the work recess with the work window portion.