JP2003020688A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To switch a foot pedal between a horizontal mounting position and a vertical mounting position according needs of an operator. SOLUTION: An operation pedal device 21 positioned on the front side of a driver seat 7 for extending/shrinking a swing cylinder 3H in a working device 3 is arranged on a floor plate 9. On the floor plate 9, a bracket 16 is installed by means of a first mounting hole 14 and the like, and a pressure reducing valve type pilot valve 22 is installed to the bracket 16. In this way, the foot pedal 24 is arranged to be extended laterally and can be operated in the horizontal mounting position. When the bracket 16 is installed to the floor plate 9 via a second mounting hole 15 and the like, the foot pedal 24 is arranged to be extended longitudinally and can be operated in the vertical mounting position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a construction machine in which an operation pedal device is arranged in front of a driver's seat.

[0002]

2. Description of the Related Art Generally, construction machines such as hydraulic excavators are
The lower traveling body, an upper revolving body rotatably provided on the lower traveling body, and a working device provided on the front side of the upper revolving body are generally configured. The upper revolving structure is attached to a revolving frame, a cab provided on the front left side of the revolving frame, a building cover defining a machine room on the revolving frame, and a rear end of the revolving frame. It is generally configured by a counter weight.

Further, the cab is provided with a driver's seat located on a floor plate provided on the revolving frame, and a traveling pedal or the like for traveling a lower traveling body is provided on the floor plate in front of the driver's seat. It is provided so that it can swing. Further, an operation lever or the like for operating the work device is provided on the front side or the side of the driver's seat.

On the other hand, some hydraulic excavators are equipped with a working device suitable for excavating a gutter. This gutter-drilling hydraulic excavator is disclosed in, for example, Japanese Patent Laid-Open No. 11-33612.
It is known from Japanese Patent Publication No. 9 and the like.

The working device provided in the hydraulic excavator of the ditch digging specification is such that the boom is attached to the lower frame so that the boom can be lifted and lowered, and the tip end side of the lower boom is swingably mounted in the left and right directions. An offset cylinder that swings the upper boom is provided between the lower boom and the upper boom.

Further, in this hydraulic excavator, left and right operation levers for operating the work device are provided on both the left and right sides of the driver's seat. Further, left and right traveling levers are provided on the front side of the driver's seat, and left and right traveling pedals are provided below these left and right traveling levers, respectively. Further, an operation pedal device for operating the offset cylinder is provided on the right side of the traveling pedal, and another operation pedal device for operating an attached attachment such as a breaker is provided on the left side of the traveling pedal. Has been.

[0007]

In the operation pedal device according to the prior art described in Japanese Patent Laid-Open No. 11-336129, a rectangular foot pedal is placed so as to extend in the front and rear directions. It is placed in the vertical mounting position. On the other hand, depending on the operator's preference and habituation, it may be desired to operate the foot pedal so as to extend in the left and right directions and operate in the lateral mounting position.

However, the position of the foot pedal is preset to either the vertical mounting position or the horizontal mounting position according to the model of the hydraulic excavator, etc., and the position of the foot pedal is determined according to the operator's preference. The problem is that it is difficult to change.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to change the mounting position of the foot pedal to a lateral mounting position or a vertical mounting position according to operator preference. It is to provide a construction machine that can.

[0010]

In order to solve the above-mentioned problems, a construction machine according to the invention of claim 1 is provided with a self-propelled vehicle body to which a working device is attached and a floor plate of the vehicle body. The vehicle includes a driver's seat and an operation pedal device located on the front side of the driver's seat and mounted on the floor plate and operated by a rectangular or oblong foot pedal.

The feature of the configuration adopted by the invention of claim 1 is that the foot pedal of the operation pedal device is mounted on the floor plate in a vertical mounting position extending forward and rearward and in a lateral mounting extending leftward and rightward. There is provided a plurality of mounting portions capable of changing the mounting position of the operation pedal device so as to be positioned.

With this construction, when the foot pedal mounting position of the operation pedal device is set to the vertical mounting position, the foot pedal is arranged so as to extend in the front and rear directions,
In this state, the operation pedal device can be attached to the floor plate through the attachment hole. Further, when the foot pedal mounting position is set to the lateral mounting position, the foot pedal can be arranged so as to extend in the left and right directions, and in this state, the operation pedal device can be mounted to the floor plate through the mounting hole.

According to the second aspect of the present invention, the bracket is mounted on the floor plate by using the mounting holes constituting the mounting portion so that the mounting position can be changed, and the operation pedal device is mounted on the bracket. With this configuration,
By changing the mounting position of the bracket with respect to the floor plate using each mounting hole, the mounting position of the foot pedal of the operation pedal device together with the bracket can be changed between the vertical mounting position and the horizontal mounting position.

According to a third aspect of the present invention, a plurality of brackets are fixedly provided on the floor plate by using the respective mounting holes that form the mounting portion, and the operation pedal device changes the mounting position through the brackets. It is configured to be mounted as much as possible. With this configuration, by changing the mounting position of the operation pedal device with respect to the bracket, the mounting position of the foot pedal can be changed between the vertical mounting position and the horizontal mounting position.

Further, in the invention of claim 4, the operation pedal device is configured to be directly attached to the floor plate by using each attachment hole which constitutes an attachment portion. With this configuration, by changing the mounting position of the operation pedal device with respect to the floor plate by using each mounting hole, the mounting position of the foot pedal can be changed between the vertical mounting position and the horizontal mounting position.

Further, in the invention of claim 5, the operation pedal device is constituted as a hydraulic operation pedal device comprising a pilot valve operated by a foot pedal, and the operation pedal device is changed in its mounting position by using the pilot valve. It is configured to do. With this configuration, the hydraulic operation pedal device can change the mounting position of the foot pedal to the vertical mounting position or the horizontal mounting position by changing the mounting position of the pilot valve.

On the other hand, according to the invention of claim 6, the operation pedal device is constituted as a hydraulic operation pedal device comprising a pilot valve operated by a foot pedal, and the floor plate accommodates the pilot valve of the hydraulic operation pedal device. A valve accommodating hole for performing the operation is provided, and each mounting hole that constitutes a mounting portion for changing the mounting position of the pilot valve with respect to the valve accommodating hole is provided around the valve accommodating hole.

With this configuration, the pilot valve of the hydraulic operation pedal device is housed in the valve housing hole, and in this state, the hydraulic operation pedal device is mounted around the valve housing hole by using each mounting hole. You can

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the operation pedal device for a construction machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings, taking as an example a case where the operation pedal device is applied to a hydraulic excavator. In the present embodiment, the case where the mounting portion is formed as a mounting hole formed in the floor plate is described as an example.

1 to 9 show a first embodiment of the present invention, in which 1 is a lower traveling body of a hydraulic excavator, and 2 is a lower traveling body.
Is an upper revolving structure provided on the lower traveling structure 1 so as to be revolvable, and the upper revolving structure 2 constitutes a self-propellable vehicle body together with the lower traveling structure 1. Further, a working device 3 is provided on the front side of the upper swing body 2 so as to be able to move up and down.

The upper revolving structure 2 has a revolving frame 4, and an engine (not shown) is mounted on the revolving frame 4.
An exterior cover 5 that covers the above and the like from the outside, and a counterweight 6 located on the rear side of the exterior cover 5 are provided.

Here, the working device 3 includes a swing post 3A swingably provided on the front side of the revolving frame 4,
A boom 3B movably provided on the swing post 3A, an arm 3C movably provided on the tip side of the boom 3B, and a bucket 3D rotatably provided on the tip side of the arm 3C. It is composed of and.

A boom cylinder 3E is provided between the swing post 3A and the boom 3B, and an arm cylinder 3F is provided between the boom 3B and the arm 3C.
A bucket cylinder 3G is provided between the arm 3C and the bucket 3D.

Further, the working device 3 includes a revolving frame 4
And a swing post 3A, a swing cylinder 3H is provided. And the swing cylinder 3
Swing post 3A by shrinking and extending H
The work device 3 is rocked to the left and right together with the work device 3 and is operated by an operation pedal device 21 described later.

Reference numeral 7 designates a driver's seat located on the front side of the engine and provided on a floor plate 9 which will be described later. On both left and right sides of the driver's seat, an operating lever device 8 (one side) (Only shown).

Reference numeral 9 is a floor plate provided on the upper side of the revolving frame 4, and the floor plate 9 is formed in a flat plate shape by a metal material having rigidity. A floor mat 10 made of a rubber material is laid on the floor plate 9, and the floor mat 10 closes a valve accommodating hole 13 described later. Further, on the floor plate 9, traveling pedals 11 and 11 located on the front side of the driver's seat 7 and traveling levers 12 and 12 linked to the traveling pedals 11 and 11 are provided.

Reference numerals 13 and 13 denote left and right valve accommodating holes which are provided on the floor plate 9 in front of the driver's seat 7.
Is formed as a square hole having a rectangular shape, and a pressure reducing valve type pilot valve 22 described later is housed therein.

Reference numerals 14 and 14 are left and right first mounting holes which are located on the front side of the valve accommodating hole 13 and are mounting portions provided on the floor plate 9. The mounting holes 14 are shown in FIGS. As shown, they are arranged around the valve accommodating hole 13 so as to be spaced apart left and right. A bracket 16 described later is removably mounted in the mounting hole 14 via a fixing bolt 17 or the like.

Reference numerals 15 and 15 are second mounting holes located on the left side of the valve accommodating hole 13 before and after they serve as mounting portions provided on the floor plate 9. The mounting holes 15 are shown in FIGS. As shown in FIG. 5, the valve housing hole 13 is located around the valve housing hole 13 and is spaced apart from the front and the rear. Then, a bracket 16 is removably attached to the attachment hole 14 via a fixing bolt 17 or the like.

16 is located in front of the valve accommodating hole 8 and is located on the floor plate 9
The bracket 16 is detachably provided on the upper side, and the bracket 16 is located around the valve accommodating hole 13 and arranged in the left and right directions. The bracket 16 is fixed to the first mounting hole 1 using the fixing bolts 17, 17 and the nuts 18, 18.
Mounting plate portions 16A attached to the mounting plates 4 and 14, rising plate portions 16B that are bent in a substantially L shape from the mounting plate portions 16A and rise upward, and left and right from the upper ends of the rising plate portions 16B. The bent plate portions 16C and 1C that are bent in a substantially L shape at positions spaced apart from each other
6C and. Also, the bracket 16
The bent plate portions 16C, 16C are provided with screw holes 16D, 16D.

Here, the bracket 16 is a fixing bolt 17
By detaching and attaching the mounting plate portion 16A to the second mounting holes 15 and 15, the mounting position can be changed as shown in FIGS.

Reference numeral 21 denotes a right-side hydraulic operation pedal device (hereinafter referred to as an operation pedal device) according to the present embodiment, which is provided on the front side of the driver's seat 7. The operation pedal device 21 is a pressure-reducing valve type pilot described later. The valve 22 and the foot pedal 24 are generally configured.

Reference numeral 22 is a pressure reducing valve type pilot valve attached to the bracket 16. The pressure reducing valve type pilot valve 22 is
As shown in FIG. 5, the casing 2 is formed in a box shape with a bottom.
2A and a lid 2 provided on the upper end of the casing 22A
2B, a pedal mounting plate 22C that is swingably provided on the lid 22B, and pushers 22D and 22D that are extendably provided inside the lid 22B.
Further, the lid 22B has flanges 22B1 on the left and right sides thereof, and bolt insertion holes 22E are formed in the flange 22B1. The pressure reducing valve type pilot valve 22 has a flange 22B1 attached to the bent plate portions 16C and 16C of the bracket 16 by fixing bolts 23 and 23 and the like.

Further, the pressure reducing pilot valve 22 is depressed by a foot pedal 24, which will be described later, in the directions A and A'shown in FIG. 5, whereby the pushers 22D are selectively pushed, Thereby, a switching valve (not shown) for supplying and discharging pressure oil to the swing cylinder 3H of the work device 3 is operated.

Reference numeral 24 denotes a foot pedal provided on the pressure-reducing valve type pilot valve 22. The foot-pedal pedal 24 is made of a rectangular flat plate and is fixed to a pedal mounting plate 22C of the pressure reducing valve type pilot valve 22. Installed.

Here, as shown in FIGS. 3 and 7, in the lateral mounting position in which the foot pedal 24 is arranged so as to extend in the left and right directions, the operator seated in the driver's seat 7 operates the foot pedal 24.
Operate by stepping on the left or right side of.

Further, as shown in FIGS. 8 and 9, in the vertical mounting position in which the foot pedal 24 is arranged so as to extend in the front and rear directions, the operator seated in the driver's seat 7 puts his foot on the foot pedal 2
4 is placed in parallel with 4, and in this state, operation is performed by stepping on the front part of the foot pedal 24 using the toes or by pressing the rear part of the foot pedal 24 using the heels.

Reference numeral 25 denotes a left hydraulic operation pedal device according to the present embodiment which is provided on the front side of the driver's seat 7. The left hydraulic operation pedal device 25 is also operated by the operation pedal device 2.
The configuration is substantially the same as that of No. 1 and is changeably attached to the horizontal mounting position and the vertical mounting position. And the operation pedal device 25
Is for operating an attachment such as a breaker attached to the work device 3 when the attachment is attached.

The hydraulic excavator according to the present embodiment has the above-described structure. First, when the working device 3 is moved to the left side of the vehicle body to perform the gutter digging work, the operator seated on the driver's seat 7 does not walk. The pedal 24 is shown in FIG.
By depressing in the direction of the arrow A, the swing cylinder 3H is extended to swing the swing post 3A connected to the front side of the revolving frame 4 to the right. Further, the upper-part turning body 2 is turned to the side opposite to the swing direction of the work device 3, that is, to the left side by the same angle. As a result, the working device 3 moves in parallel to the left direction, so that the boom 3B, the arm 3C, the bucket 3D, etc. are operated at this position to perform the ditch digging work.

On the other hand, when the working device 3 is moved to the right side of the vehicle body to perform the gutter digging work, the foot pedal 24 is depressed, for example, in the direction of arrow A'in FIG. As a result, it is possible to perform the gutter digging work on the right side.

By the way, the operator may place the foot pedal 24 in the left and right directions according to his / her preference and habituation, and operate the foot pedal 24 at the lateral mounting position.
There may be a case where the operator wants to operate the foot pedal 24 in the vertical mounting position by placing the pedal in the front and rear directions.

Therefore, in the present embodiment, the floor plate 9 is
A first mounting hole 14 for mounting the bracket 16 of the operation pedal device 21 so as to extend in the left and right directions, and a second mounting hole 15 for mounting the bracket 16 so as to extend in the front and rear directions are formed. I have set up.

Thus, in the present embodiment, the operator can appropriately attach the bracket 16 to the mounting hole 14 or the mounting hole 15 via the fixing bolt 17 or the like according to his or her preference. As a result, the foot pedal 24 can be easily attached at the horizontal mounting position or the vertical mounting position, and the operability of the foot pedal 24 can be improved.

Next, FIGS. 10 to 12 show a second embodiment of the present invention.
The embodiment is characterized in that the floor plate is provided with first, second, and third brackets by using the respective mounting holes, and the pressure-reducing valve type pilot valve is provided in the first and second brackets. By mounting, the operation pedal is arranged in the lateral mounting position, and by mounting the pressure reducing valve type pilot valve on the second and third brackets, the operation pedal is arranged in the vertical mounting position.

In the present embodiment, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Reference numeral 31 is a first bracket used in the present embodiment, which is located on the right front side of the valve accommodating hole 13 and fixed to the floor plate 9, and the first bracket 31 is formed in the floor plate 9. The mounting plate portion 31A mounted on the floor plate 9 using the first mounting holes (not shown), the fixing bolts 32, and the like, and the rising portions bent from the mounting plate portion 31A in a substantially L shape. It is configured by a plate portion 31B and a bent plate portion 31C bent from the rising plate portion 31B in a substantially L shape.

The bracket 31 is attached to the mounting plate portion 31.
A and the bent plate portion 31C are arranged so as to extend in the front and rear directions. Further, the bent plate portion 31C is provided with a first screw hole 31D into which the fixing bolt 23 is attached.

Reference numeral 33 denotes a second bracket which is located on the left front side of the valve accommodating hole 13 and fixed to the floor plate 9, and which is used in the present embodiment. The second bracket 33 is provided in the floor plate 9. A second mounting hole (not shown), a mounting plate portion 33A mounted on the floor plate 9 using the fixing bolts 34, and a rising plate portion 33B bent and rising from the mounting plate portion 33A.
And a bent plate portion 33C bent from the rising plate portion 33B.

The bracket 33 has a mounting plate portion 33.
A and the bent plate portion 33C are arranged so as to extend in the front and rear directions. Further, the bent plate portion 33C is provided with a second screw hole 33D into which the fixing bolt 23 is attached.

Reference numeral 35 denotes a third bracket which is located on the left rear side of the valve accommodating hole 8 and fixed to the floor plate 9, and which is used in the present embodiment. The third bracket 35 is formed in the floor plate 9. A mounting plate portion 35A mounted on the floor plate 9 using a third mounting hole (not shown) fixing bolts 36 and the like provided, and a rising plate portion 35B bent and rising from the mounting plate portion 35A,
It is composed of a bent plate portion 35C bent from the rising plate portion 35B.

The bracket 35 has a mounting plate portion 35.
A and the bent plate portion 35C are arranged so as to extend in the left and right directions. Further, the bent plate portion 35C is provided with a third screw hole 35D to which the fixing bolt 23 is attached.

As shown in FIG. 11, the operation pedal device 21 includes the pressure reducing valve type pilot valve 22 in the bracket 3 of the first, second and third brackets 31, 33 and 35.
The foot pedal 24 is placed in the lateral mounting position by mounting it in the screw holes 31D and 33D of 1, 33. Further, as shown in FIG. 12, by mounting the pressure reducing valve type pilot valve 22 in the screw holes 33D and 35D of the brackets 33 and 35, the foot pedal 24 is placed in the vertical mounting position.

Thus, in this embodiment having such a configuration, it is possible to obtain substantially the same operational effects as those of the first embodiment. Particularly, in the present embodiment, the floor plate 9 has three brackets 31, which are located around the valve accommodating hole 13.
33 and 35 are provided, the fixing bolt 17 is removed from the first bracket 31 when the foot pedal 24 is changed from the laterally stepped state shown in FIG. 11 to the vertically stepped state shown in FIG. 12, for example. By rotating the foot pedal 24 around the screw hole 33D in the direction of the arrow shown in FIG. 11, the foot pedal 24 can be easily changed to the vertical mounting position shown in FIG. The work of changing the mounting position of can be performed smoothly.

Next, FIGS. 13 to 15 show a third embodiment of the present invention.
The embodiment is characterized in that the floor plate is provided with first, second, and third bracket portions, and the pressure-reducing valve type pilot valve is directly attached to the floor plate using each of these bracket portions. It has been configured. In addition, in this embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

Reference numeral 41 is a cutout portion provided on the floor plate 9, and the cutout portion 41 has a substantially U shape and extends in the left and right directions.
Further, 42 is another notch provided continuously with the notch 41 on the floor plate 9, and the notch 42 is substantially U-shaped and extends in the front and rear directions.

43 is located on the right side of the notch 41 and is located on the floor plate 9
The first bracket portion 43 is formed so as to protrude from the first bracket portion 43, and the first bracket portion 43 is formed as a quadrangular protrusion. Then, the bracket portion 43 is provided with a first mounting hole 43A serving as a mounting portion.

Reference numeral 44 denotes a second bracket portion which is located between the notches 41 and 42 and which is projected on the floor plate 9. The second bracket portion 44 is formed as a rectangular protrusion. . Then, the bracket portion 44 is provided with a second mounting hole 44A serving as a mounting portion.

45 is located on the rear side of the notch 42 and is located on the floor plate 9
The third bracket portion 45 is also formed in the same manner as the bracket portion 43. The bracket portion 45 is provided with a third mounting hole 45A that serves as a mounting portion.

In the operation pedal device 21, the pressure reducing valve type pilot valve 22 is fixed to the fixing bolt 23 as shown in FIG.
And the like through the first and second bracket portions 43, 4 of the floor plate 9.
4, the foot pedal 24 is placed in the lateral mounting position as shown in FIG. In addition, the pressure-reducing valve-type pilot valve 22 is connected to the second and
By attaching to the third bracket portion 44, 45,
The foot pedal 24 is placed in the vertical mounting position as shown in FIG.

Thus, in this embodiment having such a configuration, it is possible to obtain substantially the same operational effects as those of the first embodiment. In particular, in this embodiment, the bracket 16 described in the first embodiment is eliminated, so that the number of parts can be reduced as a whole.

In the second embodiment, the first, third
The brackets 31 and 35 have screw holes 31 formed of circular holes.
The case of providing the D and 35D has been described as an example, but instead of this, for example, as in the first modification shown in FIG. 16, the brackets 31 and 35 are U-shaped with one side open. Notch holes 31D 'and 35D' may be provided as the mounting holes.

In this case, the foot pedal 24 can be rotated about the screw hole 33D in the direction of the arrow shown in FIG. 16 only by loosening the fixing bolt (not shown) attached to the cutout hole 31D '. Therefore, workability when changing the mounting position of the foot pedal 24 can be further improved.

In addition, in the third embodiment, the case where the mounting holes 43A and 45A made of circular holes are provided in the first and third bracket portions 43 and 45 of the floor plate 9 will be described as an example. However, instead of this, for example, the second shown in FIG.
As in the modified example, the bracket portions 43, 45 have notch holes 43A 'as U-shaped mounting holes with one side opened,
45A 'may be provided. Also in this case, as in the first modification, the foot pedal 24 is centered on the mounting hole 44A by simply loosening the fixing bolt (not shown) mounted in the cutout hole 43A '. Can be rotated in any direction, and workability when changing the mounting position of the foot pedal 24 can be further enhanced.

Further, in the first embodiment, the floor plate 9 is provided with mounting portions for mounting the brackets 16, the mounting holes 14,
The mounting holes 14 and 15 and the bolt 17
Although the bracket 16 is used to attach the bracket 16, the present invention is not limited to this, and the relationship of the attaching portions may be reversed.

That is, a bolt (stud bolt) similar to the bolt 17 may be detachably or fixedly attached to the floor plate 9, and the bracket 16 may be attached to the floor plate 9 by this bolt. This also applies to the second and third embodiments.

Further, in each embodiment, the foot pedal 2
The case where 4 is formed using a rectangular flat plate has been described as an example, but instead of this, the foot pedal may be formed using a long elliptical flat plate, for example.

Further, in each of the embodiments, the small-turn hydraulic excavator of the side-grooving specification equipped with the canopy as the construction machine has been described as an example, but the present invention is not limited to this, and for example, a normal boom is used. It may be applied to other construction machines such as a hydraulic excavator and a hydraulic crane. Moreover, you may apply to the hydraulic excavator provided with the cab box.

[0068]

As described in detail above, according to the first aspect of the invention, a plurality of attachments for attaching the foot pedal of the operation pedal device to the vertical attachment position and the horizontal attachment position are provided on the floor plate. Since it is configured to have a section, the operator
The foot pedal attachment position can be changed to a vertical attachment position or a horizontal attachment position according to familiarity, etc., and the foot pedal can be operated smoothly in this state, and the operability of the foot pedal can be enhanced.

According to the second aspect of the present invention, the bracket is mounted on the floor plate using the mounting holes constituting the mounting portion so that the mounting position can be changed, and the operation pedal device is mounted on the bracket. With this, the mounting position of the foot pedal of the operation pedal device can be easily changed, and workability at the time of changing the mounting position of the foot pedal can be improved.

According to the third aspect of the present invention, a plurality of brackets are fixedly provided on the floor plate by using the respective mounting holes constituting the mounting portion, and the operation pedal device changes the mounting position through the respective brackets. Since the mounting is possible, the mounting position of the foot pedal can be easily changed between the vertical mounting position and the horizontal mounting position by changing the mounting position of the operation pedal device with respect to the bracket.

Further, according to the invention of claim 4, the operation pedal device is configured to be directly attached to the floor plate by using each attachment hole forming the attachment portion. Therefore, the attachment position of the operation pedal device to the floor plate is set to each attachment hole. By using the pedal, the foot pedal attachment position can be easily changed between the vertical attachment position and the horizontal attachment position.

Further, in the invention of claim 5, the operation pedal device is configured as a pilot valve operated by a foot pedal and a hydraulic operation pedal device including the pilot valve, and the operation pedal device uses a pilot valve. Since the mounting position is changed by changing the mounting position, it is only necessary to change the mounting position of the pilot valve of the hydraulic operation pedal device to the vertical mounting position and the horizontal mounting position, and the mountability of the operating pedal device can be enhanced.

On the other hand, in the invention of claim 6, the operation pedal device is constituted as a hydraulic operation pedal device comprising a pilot valve operated by a foot pedal, and the floor plate accommodates the pilot valve of the hydraulic operation pedal device. Since a valve accommodating hole is provided for each of the valve accommodating holes, and each mounting hole that constitutes a mounting portion for changing the mounting position of the pilot valve with respect to the valve accommodating hole is provided around the valve accommodating hole, The pilot valve of the operation pedal device is housed in the valve housing hole, and in this state the mounting position of the pilot valve can be changed by using each mounting hole provided around the valve housing hole. You can improve your sex.

[Brief description of drawings]

FIG. 1 is a front view showing a hydraulic excavator applied to a first embodiment of the present invention.

FIG. 2 is an enlarged plan view showing the hydraulic excavator in FIG.

FIG. 3 is a partially enlarged view showing an operation pedal device and the like in FIG. 2 in an enlarged manner.

FIG. 4 is a view showing a bracket, an operation pedal device, and the like in FIG.
FIG. 4 is a sectional view as seen from the IV-IV direction.

5 is a partially cutaway enlarged view showing the pressure-reducing valve type pilot valve in FIG. 4 as a single body.

6 is an exploded perspective view showing a floor plate, a bracket, an operation pedal device and the like in FIG.

FIG. 7 is a perspective view showing the operation pedal device in FIG. 6 assembled to a bracket.

FIG. 8 is a partially enlarged view similar to FIG. 3, showing the operating pedal device in a vertically mounted position.

9 is a perspective view showing a bracket, an operation pedal device and the like in FIG.

FIG. 10 is an exploded perspective view showing a floor plate, a bracket, an operation pedal device and the like according to a second embodiment of the present invention.

FIG. 11 is a partially enlarged view of the operation pedal device and the like according to the second embodiment seen from the same position as in FIG.

FIG. 12 is a partially enlarged view similar to FIG. 11 showing the operation pedal device according to the second embodiment arranged in a vertical mounting position.

FIG. 13 is an exploded perspective view showing a floor plate, an operation pedal device and the like according to a third embodiment of the present invention.

FIG. 14 is a partially enlarged view of the operation pedal device and the like according to the third embodiment seen from the same position as in FIG.

FIG. 15 is a partially enlarged view similar to FIG. 14 showing the operation pedal device according to the third embodiment arranged in a vertical mounting position.

FIG. 16 is a partially enlarged view of the operation pedal device according to the first modified example of the present invention seen from the same position as in FIG.

FIG. 17 is a partially enlarged view of the operation pedal device according to the second modified example of the present invention when viewed from the same position as in FIG.

[Explanation of symbols]

1 Lower traveling body (vehicle body) 2 Upper revolving body (vehicle body) 7 Driver's seat 9 Floor plate 13 Valve housing hole 21 Hydraulic operation pedal device 14, 15, 43A, 44A, 45A Mounting hole (mounting portion) 16, 31, 33, 35 Bracket 22 Pressure reducing valve type pilot valve 24 Foot pedal 31D ', 35D', 43A ', 45A Notch hole (mounting hole)

Continued front page    (72) Inventor Gen Ishii             1-2, Sasagaoka, Mizuguchi Town, Koga District, Shiga Prefecture             Hitachi Construction Machinery Tierra Shiga Factory (72) Inventor Koji Yoshimasu             1-2, Sasagaoka, Mizuguchi Town, Koga District, Shiga Prefecture             Hitachi Construction Machinery Tierra Shiga Factory (72) Inventor Kosa Osamu             1-2, Sasagaoka, Mizuguchi Town, Koga District, Shiga Prefecture             Hitachi Construction Machinery Tierra Shiga Factory F-term (reference) 2D015 EB01

Claims (6)

[Claims] 1. A self-propelled vehicle body to which a working device is attached, a driver's seat provided on a floor plate of the vehicle body, and a rectangular shape or a long member located in front of the driver's seat and attached to the floor plate. In a construction machine comprising an operation pedal device operated by an oval foot pedal, the foot pedal of the operation pedal device is provided in front of the floor plate,
A construction machine comprising a plurality of mounting portions capable of changing the mounting position of the operation pedal device so as to have a vertical mounting position extending rearward and a horizontal mounting position extending leftward and rightward. 2. The construction according to claim 1, wherein a bracket is attached to the floor plate by using each attachment hole constituting the attachment portion so that an attachment position can be changed, and the operation pedal device is attached to the bracket. machine. 3. A structure in which a plurality of brackets are fixedly provided on the floor plate by using the respective mounting holes that form the mounting portion, and the operation pedal device is mounted such that the mounting position can be changed via the brackets. The construction machine according to claim 1, wherein: 4. The construction machine according to claim 1, wherein the operation pedal device is configured to be directly attached to the floor plate by using each attachment hole that constitutes the attachment portion. 5. The operation pedal device is configured as a hydraulic operation pedal device including a pilot valve operated by a foot pedal, and the operation pedal device is configured to change a mounting position by using the pilot valve. 1,
The construction machine according to 2, 3, or 4. 6. The operation pedal device is configured as a hydraulic operation pedal device composed of a pilot valve operated by a foot pedal, and the floor plate accommodates a valve for accommodating a pilot valve of the hydraulic operation pedal device. 4. A structure in which a hole is provided and each mounting hole constituting the mounting portion is provided around the valve housing hole in order to change the mounting position of the pilot valve with respect to the valve housing hole. Or the construction machine according to 4.