JPH11336129A - Operating pedal device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the interruption of a pedal cover when arranged at an unlock position and to improve the operability of other operating pedals. SOLUTION: At a lock position of a pedal locking device 28, an offset pedal 27 is covered with a pedal cover 33 and, at an unlock position, the pedal cover 33 is arranged on almost the same plane as that of a floor mat 20. In this way, at the lock position, the offset pedal 27 can be locked at a neutral point to prevent the malfunction of the offset pedal 27. On the other hand, at the unlock position, the pedal cover 33 is arranged on almost the same plane as that of the floor mat 20 to prevent a foot operating the offset pedal 27 from hitting the pedal cover 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation pedal device for a construction machine provided in, for example, a hydraulic shovel, a hydraulic crane, and the like.

[0002]

2. Description of the Related Art In general, a hydraulic excavator as a construction machine includes a lower traveling body, an upper revolving body rotatably provided on the lower traveling body, and a working device provided in front of the upper revolving body. The upper revolving superstructure comprises a revolving frame, a cab provided on a 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. And a counter weight attached to the section.

[0003] Further, the working device includes, for example, a boom mounted on a revolving frame so as to be able to move up and down, an arm mounted on a tip end of the boom so as to be able to move up and down, and a rotatably mounted at a tip end of the arm. And the buckets provided.

[0004] Further, the cab is provided with a driver's seat located on a floor plate provided on a frame, and in front of the driver's seat, a travel pedal or the like for running a lower traveling body is provided on the floor plate. An operation lever or the like for operating the working device is provided at the front or side of the driver's seat.

On the other hand, there is a hydraulic shovel equipped with a working device suitable for digging a gutter, and a hydraulic shovel for digging a gutter is disclosed in, for example, JP-A-9-250148.
It is known from Japanese Patent Publication No.

[0006] The working device provided in the hydraulic excavator of the gutter digging specification has a boom mounted on a revolving frame so as to be able to move up and down, and a boom mounted on a tip end of the lower boom so as to be able to swing left and right. And an offset cylinder for swinging the upper boom is provided between the lower boom and the upper boom. In this excavator, for example, another operation pedal is added in line with the right side of the traveling pedal, and the offset cylinder is operated by the operation pedal.

Here, the operation pedal for operating the offset cylinder (hereinafter, referred to as an offset pedal) is operated when taking a guttering posture at the start of work and when returning from the guttering posture to a normal working posture at the end of work. Operation is rarely performed while excavation is being performed.

[0008] Therefore, a hydraulic shovel provided with an operation pedal that is used infrequently, such as an offset pedal, operates an operation pedal that is infrequently operated so that the driver does not accidentally operate the offset pedal or the like during excavation work. There is provided a pedal lock unit that locks the lock in an impossible manner, and this pedal lock unit is known, for example, from Japanese Patent Application Laid-Open No. 8-123571 (hereinafter referred to as conventional technology).

The pedal lock means according to the prior art is provided in front of or side of the operation pedal which is not frequently used. In the lock position, the operation pedal is covered from above and operation is prohibited. In the unlocked position where the operation pedal is rotated, it is leaned forward or sideward of the operation pedal to allow operation of the operation pedal.

[0010]

By the way, in the above-mentioned hydraulic shovel according to the prior art, when the pedal lock means is arranged at the unlocked position, the pedal lock means stands on the front or side of the operation pedal. ing. For this reason, there is a possibility that the foot may hit the pedal locking means which stands when operating the offset pedal or the traveling pedal, which hinders the pedal operation.

[0011] Further, there is a possibility that the pedal lock means that has been set up may fall down due to vibrations or the like at the time of work, and in this respect, there is a problem that the pedal operation is hindered.

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 prevent the pedal cover from being obstructed when the pedal cover is disposed at the unlock position.
It is an object of the present invention to provide an operation pedal device for a construction machine that can improve the operability of another operation pedal.

[0013]

An operation pedal device for a construction machine according to the present invention includes a driver seat provided on a floor plate located in a cab of the construction machine, and a driver seat located in front of the driver seat on the floor plate. And an operation pedal which is operated to be depressed, and a pedal lock means which is turned to a lock position for inhibiting the operation of the operation pedal and an unlock position for permitting the operation.

Then, in order to solve the above-mentioned problem,
A feature of the structure adopted by the invention according to claim 1 is that the pedal lock means is provided near the operation pedal on a hinge connecting portion provided on the floor plate, and rotatably provided via the hinge connecting portion. In the lock position, the operation pedal is covered from above, and in the unlock position, the pedal cover opens to a position substantially flush with the upper surface of the floor plate.

With this configuration, the operation of the operation pedal can be prohibited by rotating the pedal cover via the hinge connecting portion and covering the operation pedal with the pedal cover. In this case, the pedal cover covering the operation pedal can be used as a footrest. Also, when the pedal cover is turned to the floor plate side to release the lock to the unlock position, the pedal cover is substantially flush with the upper surface of the floor plate. Can be suppressed.

According to a second aspect of the present invention, when the operation pedal is at the neutral position, the operation pedal has a constant inclination angle in the front-rear direction with respect to the floor plate, and the hinge connection portion is provided on one side in the left-right direction of the operation pedal. The pedal cover is disposed so as to extend in the front-rear direction at an angle corresponding to the tilt angle of the operation pedal at the lock position, and to cover the operation pedal at the neutral position from above.

With this configuration, the operation pedal is inclined in the front-rear direction at the neutral position, but when the pedal cover is disposed at the lock position, the pedal cover is inclined corresponding to the inclination angle of the operation pedal. Thereby, the operation can be prohibited by covering the operation pedal in the neutral position.

According to a third aspect of the present invention, the hinge connecting portion comprises: a floor plate side bracket provided on the floor plate side; a cover side bracket provided on the pedal cover at a position corresponding to the floor plate side bracket; And a connecting pin rotatably connected.

With this configuration, the cover-side bracket can rotate about the connecting pin with respect to the floor-side bracket, so that the pedal cover can be rotated with respect to the floor plate.

According to a fourth aspect of the present invention, the hinge connecting portion is configured to be inclined with respect to the floor plate at an angle of about one half of the inclination angle of the pedal cover at the lock position.

With this configuration, when the pedal cover is arranged at the lock position, the inclination angle of the operation pedal in the neutral position is determined by the inclination of the hinge connecting portion with respect to the floor plate and the inclination of the pedal cover with respect to the hinge connecting portion. Therefore, the pedal cover can be arranged along the operation pedal in the neutral position. Further, when the pedal cover is disposed at the unlock position, the inclination of the hinge connection portion with respect to the floor plate is substantially equal to the inclination of the pedal cover with respect to the hinge connection portion, and the upper surface of the floor plate and the pedal cover are parallel to each other. Therefore, the pedal cover can be disposed substantially in the same plane by closely contacting the pedal cover to the upper surface of the floorboard.

According to a fifth aspect of the present invention, the pedal cover is formed of a substantially rectangular plate having a larger area than the operation pedal, and the pedal cover is moved from the locked position to the unlocked position on one side in the left-right direction of the pedal cover. That is, a footrest for rotation is provided.

With this configuration, the operation pedal can be reliably covered by the pedal cover in the locked position, and the operation can be prohibited. The driver can easily rotate the pedal cover from the locked position to the unlocked position by operating the footrest on the footrest projection.

According to a sixth aspect of the present invention, the floor plate is composed of a base plate formed of a rigid material in a flat plate shape, and a floor mat made of an elastic material laid on the base plate, and the hinge connecting portion is formed by the hinge connection portion. It is provided on the base plate.

With this configuration, the ride comfort can be improved by the floor mat made of an elastic material. When the pedal cover is located at the unlock position, the pedal cover is almost the same as the floor mat. Can be arranged in a plane.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an operation pedal device of a small turning hydraulic excavator of a side ditch specification will be described as an example of an operation pedal device of a construction machine according to an embodiment of the present invention, and will be described in detail with reference to FIGS. I do.

Reference numeral 1 denotes a lower traveling body, and 2 denotes an upper revolving body mounted on the lower traveling body 1 so as to be pivotable.
Includes a turning frame 3, a cab box 4 as a cab provided on the left front side of the turning frame 3, and a machine room for housing an engine, a hydraulic pump (neither is shown) and the like on the turning frame 3. The turning frame 3 is roughly constituted by a defined building cover 5 and a counterweight 6 attached to the rear end of the turning frame 3. The turning frame 3 is provided with a working device 7 for excavating earth and sand.

The working device 7 includes a lower boom 8 attached to the revolving frame 3 so as to be able to move up and down, an upper boom 9 attached to the tip of the lower boom 8 so as to be swingable in the left-right direction, and the upper boom 9. An arm connecting body 10 attached to the tip of the arm so as to be swingable in the left-right direction, and an arm 11 attached to the arm connecting body 10 so as to be able to move up and down.
It is roughly constituted by a bucket 12 rotatably attached to the tip of the arm 11.

A link rod 13 is rotatably connected between the distal end of the lower boom 8 and the arm connector 10, and the link rod 13 serves as a link mechanism together with the lower boom 8, the upper boom 9 and the arm connector 10. The arm 11 (arm connection body 10) is always kept parallel to the lower boom 8 by the link mechanism.

Further, a boom cylinder 14 is provided between the turning frame 3 and the lower boom 8, an arm cylinder 15 is provided between the arm connector 10 and the arm 11, and a boom cylinder 15 is provided between the arm 11 and the bucket 12. Is provided with a bucket cylinder 16. An offset cylinder 17 is provided between the lower boom 8 and the upper boom 9. The offset cylinder 17 swings the upper boom 9 in the left and right directions with respect to the lower boom 8 to move the arm 11 and the bucket 12 in the left and right directions. And is operated by an offset pedal 27 described later.

Numeral 18 is provided above the revolving frame 3,
As shown in FIG. 2, a floor plate that forms the bottom surface of the cab box 4,
As shown in FIG. 3, the floor plate 18 includes a base plate 19 formed of a rigid metal material in a flat plate shape, and a floor laid near the front side of the base plate 19 and formed of an elastic rubber material. The base plate 19 and the floor mat 20 have pedal mounting holes 19A and 20A, respectively. A valve mounting plate 19B is provided on the lower surface side of the base plate 19 at a position corresponding to the pedal mounting hole 19A.
A hydraulic pilot valve 26 described later is attached to 9B.

An operator's seat 21 is mounted on the base plate 19 at a position closer to the rear side of the floor plate 18 and runs in front of the driver's seat 21 on the floor plate 18 as shown in FIG. There are provided driving pedals 22, 22, and driving levers 23, 23 interlocked with the driving pedals 22, 22, respectively. Also,
Operation levers 24 for operating the working device 7 are provided on both left and right sides of the driver's seat 21.

Reference numeral 25 denotes an operation pedal device provided in front of the driver's seat 21. The operation pedal device 25 is generally constituted by a hydraulic pilot valve 26, an offset pedal 27 and the like, which will be described later, as shown in FIGS. ing.

Numeral 26 designates a hydraulic pilot valve mounted on a valve mounting plate 19B of the base plate 19.
Reference numeral 6 designates a switch valve (not shown) for supplying and discharging pressure oil to and from the offset cylinder 17 according to the inclination angle of the offset pedal 27 when the offset pedal 27 is depressed.

Numeral 27 designates a floor panel 1 located in front of the driver's seat 21.
The offset pedal 27 is formed as a substantially rectangular plate extending in the front-rear direction, and its front and rear ends are bent upward. The offset pedal 27 is attached to the hydraulic pilot valve 26 via a trapezoidal bracket 27A, and is swingable in the front-rear direction.

Here, when the offset pedal 27 is in the neutral state, it is inclined at a constant inclination angle β so as to increase from the rear side, which is the driver's seat 21 side, to the front side as shown in FIG. doing.

A pedal lock device 28 is provided near the offset pedal 27.
Is generally constituted by a hinge connecting portion 29, a pedal cover 33, and a foot projection 34 described later.

Reference numeral 29 denotes a hinge connecting portion provided on the right side of the offset pedal 28 opposite to the traveling pedal 22. The hinge connecting portion 29 includes a floor plate side bracket 30 attached to the floor plate 18 and a pedal cover 33. And a connecting pin 3 for connecting the floor plate side bracket 30 and the cover side bracket 31 to each other.
And 2.

Here, reference numeral 30 denotes a floor plate-side bracket provided on the floor plate 18 side.
8, a bottom plate 30A bolted to the base plate 19, a vertical plate 30B bent from the bottom plate 30A and extending upward and inclined rearward as shown in FIG. 3, and a cylinder from the distal end side of the vertical plate 30B. And a pin insertion portion 30C extending in the shape of a circle.

Reference numeral 31 denotes a cover-side bracket provided on the pedal cover 33 side. The cover-side bracket 31 is a rectangular welding plate fixed to a bent portion 33A of the pedal cover 33 described later by fixing means such as welding. Part 31A
And a pair of pin insertion portions 31B, 31B extending cylindrically from the welding plate portion 31A and provided so as to sandwich the pin insertion portion 30C of the floor plate side bracket 30 from the axial direction.

Reference numeral 32 denotes a connecting pin provided between the floor plate side bracket 30 and the cover side bracket 31. The connecting pin 32 is a pin insertion portion 30C of the floor plate side bracket 30 and a pin insertion portion of the cover side bracket 31. 31B and the floor plate side bracket 30, the cover side bracket 31
Together with the hinge.

As described above, the hinge connecting portion 29 is connected to the floor plate 18.
The pivotal axis OO of the connecting pin 32, which is the center of rotation of the pedal cover 33, is higher from the rear side toward the front side with respect to the upper surface 20B of the floor mat 20. And an angle α that is approximately half the inclination angle β of the offset pedal 27 or the pedal cover 33.
Inclined with one.

Reference numeral 33 denotes a pedal cover attached to the hinge connecting portion 29. As shown in FIG. 4, the pedal cover 33 is made of a substantially rectangular plate having a larger area than the offset pedal 27, and has a length on the right side thereof. As shown in FIG. 5, the side is provided with a bent portion 33A bent at a substantially right angle. In addition, the bent portion 33A includes the hinge connecting portion 29.
A notch 33B is formed to allow the rotation of.
The central portion of the bent portion 33A is attached to the cover-side bracket 31 of the hinge connection portion 29 so that the pedal cover 33 has an angle substantially equal to the inclination angle β of the offset pedal 27 at the neutral position in the locked position described later. It is fixed by fixing means such as welding.

Reference numeral 34 denotes a bent portion 33A of the pedal cover 33.
In the foot projection provided on the rear, the foot projection 34,
It is provided so as to protrude from the bent portion 33A. And
When the pedal cover 33 is in the locked position, the footrest projection 34 is stepped downward by putting a foot on the pedal cover 33 to move the pedal cover 33 to an unlocked position described later.
In the direction of rotation.

The thus configured pedal lock device 2
8, the upper surface 33C of the pedal cover 33 at the lock position with respect to the upper surface 20B of the floor mat 20 is inclined at an angle substantially equal to the inclination angle β of the offset pedal 27 at the neutral position, and the rotation center of the hinge connecting portion 29 is rotated. The axis OO of the connecting pin 32 becomes the upper surface 2 of the floor mat 20.
It is inclined at an angle α1 which is approximately one half of the angle β with respect to 0B. The inclination angle α2 of the upper surface 33C of the pedal cover 33 with respect to the axis OO of the connecting pin 32 is
The offset pedal 27 or the pedal cover 33 is formed so as to be approximately half the inclination angle β.

Therefore, in the locked position of the pedal cover 33 shown in FIGS.
The offset pedal 2 at the neutral position is determined by the inclination angle α1 of the axis OO of the connecting pin 32 with respect to the axis B and the angle α2 of the pedal cover 33 with respect to the axis OO of the connecting pin 32.
7, the pedal cover 33 can be arranged.

When the pedal cover 33 is located at the unlocked position shown in FIG. 6, the inclination angle α1 of the connecting pin 32 with respect to the floor mat 20 depends on the inclination of the pedal cover 33 with respect to the axis OO of the connecting pin 32. Since the angle is substantially equal to the angle α2, the upper surface 33C of the pedal cover 33 is parallel to the upper surface 20B of the floor mat 20 in this unlocked position, and the pedal cover 33 is in close contact with the floor mat 20 and is substantially flush with the floor mat 20. Be placed. Thus, the driver can operate the offset pedal 27.

The operation pedal device 25 according to the present embodiment has the above-described configuration. Next, a method of operating the operation pedal device 25 will be described.

First, when taking the side groove digging posture at the start of the work, the pedal cover 33 is set to the unlocked position where the pedal cover 33 is arranged on the floor mat 20 as shown in FIG. Accordingly, the driver steps on the offset pedal 27 to swing the upper boom 9 in the left-right direction. When the offset pedal 27 is operated, the pedal cover 33
Is open to a position substantially flush with the floor mat 20, so that the offset pedal 27 is attached to the pedal cover 33.
It is possible to prevent the feet for operating the operation from hitting each other.

Next, the working device 7 is in a guttering posture,
When it is not necessary to operate the offset pedal 27 for a while, the pedal cover 33 is moved to the direction indicated by the arrow B in FIG.
The pedal cover 33 is turned on the offset pedal 27 and placed on the offset pedal 27, and the pedal cover 33 is set to the locked position. Thus, the offset pedal 27 is locked at the neutral position by the pedal cover 33, so that erroneous operation of the offset pedal 27 during excavation work can be prevented. Further, the foot can be used as a footrest by placing a foot on the upper surface 33C of the pedal cover 33 arranged at the lock position.

Next, when the excavation work is completed and the working device 7 is returned from the ditching posture to the normal working posture, the foot is put on the footrest projection 34 and depressed, so that the pedal cover 33 is moved in the direction indicated by the arrow A. The pedal cover 33 can be easily arranged at the unlocked position. Then, by operating the offset pedal 27 in this state, the working device 7 can be returned to the normal working posture.

As described above, according to the present embodiment, at the locked position where the offset pedal 27 is covered by the pedal cover 33, the offset pedal 27 can be locked at the neutral position. Can be prevented. Further, the pedal cover 33 disposed at the lock position can be used as a footrest.

On the other hand, when the pedal cover 33 is disposed at the unlock position, the pedal cover 33 can be disposed substantially on the same plane as the floor mat 20. 33
The operability of the traveling pedal 22, the offset pedal 27, and the like can be improved to improve workability.

Further, the inclination angle α 1 of the connecting pin 32 with respect to the floor mat 20 is set to the inclination angle β of the offset pedal 27 or the pedal cover 33 with respect to the floor mat 20.
When the pedal cover 33 is located at the unlocked position, the pedal cover 33
Can be arranged so as to be in close contact with the floor mat 20.

In the unlocked position of the pedal cover 33, the pedal cover 33 is disposed on the floor mat 20. Therefore, even when vibration occurs during work, the pedal cover 33 is positioned in the unlocked position. Can be held.

Further, the footrest projection 3 is attached to the pedal cover 33.
4, the pedal cover 33 can be easily rotated from the locked position to the unlocked position by putting a foot on the footrest projection 34 and performing a stepping operation, thereby improving the operability of the pedal lock device 28. Can be enhanced.

In the embodiment, the hinge connecting portion 29 of the pedal lock device 28 is provided on the right side of the offset pedal 27.
And the like, and the case where the pedal cover 33 is rotated so as to open to the right is illustrated. However, the present invention is not limited to this. For example, when there is a space on the left side of the offset pedal 27, The hinge connecting portion 29 of the pedal lock device 28 and the like are disposed on the left side of the
May be rotated to open to the left.

In the embodiment, the case where the offset pedal 27 as the operation pedal is locked by the pedal cover 33 has been described as an example. However, the present invention is not limited to this, and for example, a breaker or the like is operated. Another operation pedal may be locked by the pedal cover 33.

Further, in the embodiment, the small turning hydraulic excavator of the side digging type provided with the cab box 4 has been described as an example of the construction machine. However, instead of this, for example, a hydraulic excavator having a normal boom may be used. You may apply to other construction machines, such as a shovel and a hydraulic crane. Moreover, you may apply to the hydraulic excavator provided with the canopy.

[0060]

As described in detail above, according to the first aspect of the present invention, the pedal lock means is provided with a hinge connecting portion provided on the floor plate, and is rotatably provided via the hinge connecting portion. In the locked position, the operation pedal is covered from above, and in the unlocked position, the pedal cover is substantially coplanar with the upper surface of the floor plate. By covering the operation pedal, operation of the operation pedal can be prohibited, and erroneous operation of the operation pedal can be prevented. In this locked position, a pedal cover covering the operation pedal can be used as a footrest.

On the other hand, when the pedal cover is turned to the floor plate side to release the lock to the unlock position, the pedal cover can be made substantially flush with the upper surface of the floor plate. As a result, the protrusion of the pedal cover at the unlocked position can be suppressed, so that the foot for operating the operation pedal can be prevented from hitting the pedal cover, and the operability of the operation pedal can be improved to improve workability. it can.

According to the second aspect of the present invention, even when the operation pedal is in the neutral position and the operation pedal is tilted in the front-rear direction, when the pedal cover is disposed in the lock position, the inclination angle of the operation pedal is The operation pedal can be covered by a pedal cover that is inclined in accordance with the operation pedal, and the operation of the operation pedal can be prohibited at the neutral position.

According to the third aspect of the present invention, the hinge connecting portion includes a floor plate side bracket provided on the floor plate side, a cover side bracket provided on the pedal cover at a position corresponding to the floor plate side bracket, and Since the bracket is constituted by the connecting pin for rotatably connecting the bracket, the cover-side bracket can be rotatably connected to the floor plate-side bracket about the connecting pin, and the pedal cover can be rotated relative to the floor plate. .

According to the fourth aspect of the present invention, since the inclination angle of the hinge connecting portion with respect to the floor plate is set to approximately one half of the inclination angle of the pedal cover at the lock position, the pedal cover is disposed at the lock position. The inclination angle of the operation pedal in the neutral position can be determined by the inclination of the hinge connection portion with respect to the floor plate and the inclination of the pedal cover with respect to the hinge connection portion, and the pedal cover can be arranged along the operation pedal in the neutral position. it can.

When the pedal cover is arranged at the unlock position, the inclination of the hinge connecting portion with respect to the floor plate is
By making the angle approximately equal to the inclination of the pedal cover with respect to the hinge connection portion, the upper surface of the floor plate and the pedal cover can be made parallel to make the pedal cover adhere to the floor plate, and the floor plate and the pedal cover are arranged on substantially the same plane. can do.

According to the fifth aspect of the present invention, since the pedal cover is formed of a substantially rectangular plate having an area larger than that of the operation pedal, the operation pedal is securely covered by the pedal cover in the locked position, and the operation is performed. Can be banned. Further, since the pedal cover is provided with a footrest for rotating the pedal cover from the locked position to the unlocked position, the driver locks the pedal cover from the locked position by operating the footrest with the foot. It can be easily turned to the release position, and operability can be improved.

According to the sixth aspect of the present invention, since the floorboard is constituted by the base plate made of a rigid material and the floor mat made of an elastic material, the ride comfort can be improved by the floor mat. When the pedal cover is arranged at the unlock position, the pedal cover can be arranged substantially flush with the floor mat.

[Brief description of the drawings]

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

FIG. 2 is a partially broken perspective view showing the inside of the cab box in an enlarged manner.

FIG. 3 is an enlarged sectional view showing an operation pedal device, a pedal lock device, and the like in FIG. 2 as viewed from the direction of arrows III-III.

FIG. 4 is a partially broken plan view showing the operation pedal device and the pedal lock device together with a floor plate in an enlarged manner.

5 is an enlarged sectional view showing the pedal lock device in a state where the pedal cover of the pedal lock device is arranged at a lock position, as viewed from a direction indicated by an arrow VV in FIG. 3;

FIG. 6 is an enlarged cross-sectional view showing the pedal lock device in a state where the pedal cover is arranged at an unlock position, as viewed from the same position as in FIG. 5;

[Explanation of symbols]

Reference Signs List 18 floor plate 19 base plate 20 floor mat 20B upper surface 25 operation pedal device 27 offset pedal (operation pedal) 28 pedal lock device (pedal lock means) 29 hinge connection portion 32 connection pin 33 pedal cover 34 footrest projection α1 of connection pin for floor mat Tilt angle α2 Tilt angle of pedal cover with respect to connecting pin β Tilt angle of offset pedal in neutral position with respect to floor mat β Tilt angle of pedal cover located in locked position with respect to floor mat

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Teruo Irino 650 Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Within Hitachi Construction Machinery Engineering Co., Ltd.

Claims (6)

[Claims] 1. A driver's seat provided on a floor plate located in a cab of a construction machine; an operation pedal provided on the floor plate located in front of the driver's seat and operated by depressing; An operation pedal device for a construction machine, comprising: a pedal lock unit that is rotated between a lock position for inhibiting a stepping operation and an unlock position for allowing a stepping operation, wherein the pedal lock unit is located near the operation pedal. A hinge connecting portion provided on the floor plate, and rotatably provided via the hinge connecting portion, covering the operation pedal from above in a locked position, and substantially flush with the upper surface of the floor plate in a unlocked position. A pedal cover for a construction machine, comprising: a pedal cover that opens to a position where 2. When the operation pedal is in a neutral position, the operation pedal has a constant inclination angle in the front-rear direction with respect to the floor plate, and the hinge connection portion is located on one side of the operation pedal in the left-right direction. 2. The construction machine according to claim 1, wherein the pedal cover extends in the front-rear direction at an angle corresponding to a tilt angle of the operation pedal in a lock position, and covers the operation pedal in the neutral position from above. 3. Operation pedal device. 3. The hinge connecting portion includes: a floor plate side bracket provided on the floor plate side; a cover side bracket provided on the pedal cover at a position corresponding to the floor plate side bracket; The operation pedal device for a construction machine according to claim 1, wherein the operation pedal device is configured by a connection pin that is connected to the operation machine. 4. The operation of a construction machine according to claim 2, wherein the hinge connection portion is configured to be inclined with respect to the floor plate at an angle of about one half of an inclination angle of the pedal cover in the lock position. Pedal device. 5. The pedal cover is made of a substantially rectangular plate having an area larger than that of the operation pedal, and the pedal cover is turned from a locked position to an unlocked position on one side in the left-right direction of the pedal cover. 5. The operation pedal device for a construction machine according to claim 1, further comprising a footrest to be moved. 6. The floor plate is composed of a base plate formed of a rigid material in a flat plate shape, and a floor mat made of an elastic material laid on the base plate, and the hinge connection portion is provided on the base plate. Claims 1,2,2 provided
6. The operation pedal device for a construction machine according to 3, 4, or 5.