JP2001226907A - Road roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly conduct getting-on-and-off motion to and from a driver's seat safely, and to reduce the fatigue of an operator in the paving operation. SOLUTION: An auxiliary step 25 is installed, positioning between a floor plate 22 and a step 24 for getting-on-and-off in the rear-section car body 21 of the road roller. Thus, an operator M can step forwards with small steps respectively between a ground surface G and the step 24 for getting-on-and-off, between the step 24 and the auxiliary step 25 and between the auxiliary step 25 and the floor plate 22, and can get on and off to and from a driver's seat 10 rapidly and safely. Even when the operator M sitting on the driver's seat 10 leans forward the upper half of the body in the left and the right directions from the driver's seat 10 and conducts paving operation, the operator M steps in the auxiliary step 25 in an easy posture and the body can be stabilized by stretching its leg from the driver's seat 10, and paving workability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road roller suitably used for pavement work for compacting a pavement material such as gravel or asphalt spread on a road surface or the like.

[0002]

2. Description of the Related Art Generally, a road roller such as a drum roller, a tire roller, a macadam roller or the like is used when performing a pavement work on a road surface or the like, and after paving material such as gravel or asphalt is spread on a leveled road surface, A method is employed in which a pavement material is compacted by running a road roller.

For example, when performing paving work on a narrow road or the like, a small road roller having a total weight of 5 tons or less is preferably used.

A small-sized load roller according to the related art will be described with reference to FIGS. 5 to 8. FIG.

In FIG. 1, reference numeral 1 denotes a vehicle body of a load roller. The vehicle body 1 is connected to a front vehicle body 2 on which a front-side pressure roller 6 to be described later is rotatably provided, and to the front vehicle body 2 via a coupling device 3. The vehicle is substantially constituted by a rear body 4 that is swingably connected to the left and right and that is provided with a rear pressure roller 8 to be described later rotatably.

Here, the front body 2 will be described.
The front vehicle body 2 is formed in a box shape surrounded by a front plate 2A, a rear plate 2B, left and right side plates 2C, 2C, a bottom plate 2D, and the like. An engine, a hydraulic pump (not shown) and the like are accommodated in the front vehicle body 2, and these engines and the like are covered by a top cover 5.

Reference numeral 6 denotes a front-side compaction roller rotatably provided on the front body 2. The front-side compaction roller 6 has, for example, an axial dimension larger than the width of the front body 2 in the left and right directions. It is made up of a metal drum with a drip. The front-side pressure roller 6 is driven to rotate by a traveling hydraulic motor (not shown) while generating vibration by a vibration hydraulic motor (not shown), so that the pavement spread on the road surface. It is to consolidate the material.

Reference numeral 7 denotes a steering cylinder provided between the front vehicle body 2 and the rear vehicle body 4. The steering cylinder 7 expands and contracts in response to an operation of a steering device 13 described later, so that the center of the connecting device 3 is adjusted. In this case, the rear body 4 is swung in the left and right directions with respect to the front body 2.

Next, the rear body 4 will be described. The rear body 4 is formed in a box shape surrounded by a front plate 4A, a rear plate 4B, left and right side plates 4C, 4C, a bottom plate 4D and the like. I have. Here, the width of the front panel 4A in the left and right directions is smaller than the width of the rear panel 4B, and the front side of each side panel 4C joined to the front panel 4A is connected to the connecting device 3. The inclined surface 4C1 is inclined toward the surface. Therefore, as shown in FIG.
The right front corner is a hexagonal box with a diagonal cutout. A square hole 4E is formed at the center of the inclined surface 4C1 of each side plate 4C.

Reference numeral 8 denotes a rear pressure roller provided rotatably on the rear vehicle body 4. The rear pressure roller 8 is fixed to, for example, one axle (not shown) extending leftward and rightward. Done 4
.. Are constituted by a plurality of rubber rollers (tires) 8A, 8A,. The rear pressure roller 8 is driven by a traveling hydraulic motor (not shown) disposed in the rear vehicle body 4 to compact the pavement material laid on the road surface.

Reference numeral 9 denotes a floor panel provided on the rear vehicle body 4. The floor panel 9 is made of, for example, a steel plate or the like, and is provided at the upper end of the front panel 4A, the rear panel 4B, and the left and right side panels 4C of the rear vehicle body 4. Each is fixed by welding or the like. After getting on the upper surface 9A of the floor panel 9, the operator M sits on a driver's seat 10 described later.

A driver's seat 10 is disposed on a floor plate 9 via a support base 11. The driver's seat 10 extends leftward and rightward of the rear vehicle body 4, and an operator M sits on an upper surface 10A thereof. Is what you do.

Here, since it is necessary for the operator M seated in the driver's seat 10 to secure a large field of view when checking the periphery of the road roller during pavement work, the height h1 from the ground G to the upper surface 9A of the floor plate 9 is required. It is desirable to set the height dimension h2 from the upper surface 9A of the floor panel 9 to the upper surface 10A of the driver's seat 10 as large as possible.

However, if the heights h1 and h2 are too large, the vibration transmitted to the operator M who is seated in the driver's seat 10 when the load roller starts and stops is increased. Usually, the height h1 from the ground G to the upper surface 9A of the floor plate 9 is 700
mm ≦ h1 ≦ 1000 mm.

Reference numeral 12 denotes a control stand erected on the front side of the center of the driver's seat 10. The control stand 12 is provided with a steering device 13 for steering. When the operator M seated in the driver's seat 10 steers the steering device 13, the steering cylinder 7 expands and contracts, and the rear vehicle body 4 swings left and right around the coupling device 3, thereby causing a road load. The running direction of the rollers is controlled.

Numerals 14 and 14 are provided on the left and right side surfaces of the rear vehicle body 4, respectively, to form a scaffold for the operator M to get on and off the driver's seat 10. As shown in FIGS. 7 and 8, for example, by bending a steel plate or the like,
A is formed as a bent plate having an inclined surface 14B inclined downward from A, and the upper surface 14A serves as a scaffold when getting on and off. The step 14 for getting on and off is fixed to the inclined surface 4C1 of the side plate 4C by means of welding or the like with the upper end side inserted into the square hole 4E, so that the left and right It is located in the right front corner.

This prevents the step 14 for getting on and off from protruding from the side plate 4C of the rear vehicle body 4, and prevents the step 14 for getting on and off from colliding with an obstacle such as a wall erected on the road surface during pavement work. It is a configuration that can be prevented.

The small-sized road roller according to the prior art has the above-described configuration. When performing pavement work on a road surface by using this road roller, first, the operator M uses the step 14 for getting on and off as a scaffold, and the floor plate 9. The driver gets on the vehicle and sits on the upper surface 10A of the driver's seat 10.

Then, the operator M seated in the driver's seat 10 runs the load roller while operating the steering device 13 and the like, and the pavement material spread on the road surface is moved by the front-side pressure roller 6 and the rear-side pressure roller 8. Perform pavement work on the road surface by tamping.

[0020]

However, the small-sized road roller according to the prior art described above only has the step 14 for getting on and off the vehicle between the ground G and the floor plate 9.
The above-described height dimension h1 is set at the step 14 for getting on and off from the ground G.
Height a to the upper surface 14A of the vehicle and the step 14
From the upper surface 14A of the floor panel 9 to the upper surface 9A of the floor panel 9.

For this reason, when the height dimension a is set small, the height dimension d becomes large, and the step length when the operator M steps on the floor board 9 from the step 14 for getting on and off becomes large. When the height dimension d is set to be small, the height dimension a becomes large, and the stride when the operator M steps from the ground G to the step 14 for getting on and off becomes large.

Therefore, the operator M must step between the ground G and the step 14 for getting on and off, or between the step 14 for getting on and off and the floor panel 9 with a large step.
There is a problem that the operator easily gets tired when getting on and off the driver's seat 10, and particularly for a female operator with a small stride, getting on and off the driver's seat 10 becomes a heavy burden.

The operator M seated in the driver's seat 10
For example, when paving the left side of the road surface, the driver's seat 10
When the steering device 13 is operated while monitoring the left end of the front-side compaction roller 6 while paving the upper body from the left end of the vehicle, and the right side of the road surface is paved, the upper body is started from the right end of the driver's seat 10. Then, the steering device 13 is operated while monitoring the right end of the front-side pressure roller 6.

As described above, the operator M leans on the upper body from the driver's seat 10 leftward and rightward, and
When operating the operator 3, the operator M needs to step on the upper surface 9A of the floor plate 9 to maintain his / her body stability, but when the height dimension h2 from the upper surface 9A of the floor plate 9 to the upper surface 10A of the driver's seat 10 is small. In this case, the operator M steps on the floor plate 9 in an unstable posture in which the knee is greatly bent, and the operator M tends to be tired because the operator M keeps the unstable posture, resulting in reduced workability. There is.

The present invention has been made in view of the above-mentioned problems of the prior art, and enables a quick and safe operation of getting into and out of a driver's seat. It is an object of the present invention to provide a load roller capable of improving performance.

[0026]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a vehicle body in which front and rear compaction rollers are rotatably provided, and is provided on a floor plate of the vehicle body. The present invention is applied to a road roller including a driver's seat and a step for getting on and off provided on a side surface of the vehicle body for getting on and off the driver's seat.

The first aspect of the present invention is characterized in that the height H1 from the ground to the upper surface of the floor plate is set in a range of 700 mm ≦ H1 ≦ 1000 mm, and An auxiliary step is provided between the step and the auxiliary step, and the height dimension from the ground to the upper surface of the step for getting on and off is A, the height from the upper surface of the step for getting on and off to the upper surface of the auxiliary step is B, When the height from the upper surface of the auxiliary step to the upper surface of the floor plate is C, the height B is 300 mm ≦ B ≦ 400.
mm, and the height H3 from the upper surface of the auxiliary step to the upper surface of the driver's seat is set to 400 mm ≦ H3 ≦
That is, it is set in the range of 600 mm.

[0028] With this configuration, the auxiliary step serves as a second scaffold between the step for getting on and off and the floor plate, so that the operator can sequentially move the step for getting on and off, the auxiliary step, and the floor plate from the ground with a small stride. After stepping on, you can get into the driver's seat. Further, the operator can step down on the floorboard, the auxiliary step, and the getting on / off step sequentially with a small stride, and then can get down to the ground.

Further, since the height H3 from the upper surface of the auxiliary step to the upper surface of the driver's seat is set in the range of 400 mm ≦ C ≦ 600 mm, the operator sitting in the driver's seat can
The upper surface of the auxiliary step can be depressed in a comfortable posture with the legs extended. Thus, for example, even when an operator seated in the driver's seat leans on the upper body in the left and right directions from the driver's seat to perform paving work, the operator can stabilize the body by stepping on the assisting steps with a comfortable posture. .

According to a second aspect of the present invention, the height H2 from the upper surface of the floor plate to the upper surface of the driver's seat is set to 300 mm ≦ H2 ≦ 575.
mm.

According to a third aspect of the present invention, the length of the auxiliary step protruding from the side of the vehicle body is set smaller than the length of the step of getting on and off the vehicle from the side of the vehicle body.

[0032] With this configuration, the auxiliary step and the step for getting on and off become a scaffold that is continuous in a step-like manner, so that the operator can get on and off the driver's seat quickly and safely using the step for getting on and off and the auxiliary step. can do.

According to a fourth aspect of the present invention, the projecting lengths of the step for getting on and off and the auxiliary step from the side surface of the vehicle body are as follows:
The present invention is characterized in that the pressure roller is set to be shorter than a protruding length from a side surface of the vehicle body.

With this configuration, it is possible to prevent the step for getting on and off and the auxiliary step from colliding with an obstacle such as a fence erected on the road surface during traveling of the vehicle body, and to provide safety during pavement work. Can be increased.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a load roller according to the present invention will be described in detail with reference to FIGS.
In the present embodiment, the same reference numerals are given to the same components as those in the above-described conventional technology, and the description thereof will be omitted.

In the figure, reference numeral 21 denotes a rear body applied to the present embodiment instead of the rear body 4 according to the prior art. The rear body 21 is substantially the same as the rear body 4 according to the prior art, and has a front plate 21A and a rear panel 21A. Face plate 21B, left and right side plates 21C, 21
C, a box shape surrounded by a bottom plate 21D and the like. The front side of each side plate 21C is an inclined surface 21C1 inclined toward the connecting device 3, and a square hole 21E is formed in the center of each inclined surface 21C1.

However, on the upper end side of each inclined surface 21C1,
Step portion 21F for attaching an auxiliary step 25 described later
Is different from the prior art.

Reference numeral 22 denotes a floor plate applied to the present embodiment in place of the floor plate 9 according to the prior art. The floor plate 22 is substantially the same as the floor plate 9 according to the prior art, and
A, the rear plate 21B and the left and right side plates 21C are fixed to the upper end portions by welding or the like, respectively, and the upper surface 22A is a scaffold for the operator M. Also, on the floor plate 22,
A driver's seat 10 similar to that of the related art is provided via a support base 23.

However, unlike the prior art, left and right cutouts 22B, 22B for attaching the auxiliary step 25 are formed in the front corners on both the left and right sides of the floorboard 22. I have.

Here, from the ground G to the upper surface 22A of the floor plate 22
Height H1 up to 700 mm ≦ H1 ≦ 1000 m
It is set to a value in the range of m, for example, H1 = 830 mm. The height H2 from the upper surface 22A of the floor plate 22 to the upper surface 10A of the driver's seat 10 is 300 mm ≦ H2 ≦ 57.
The value is set in a range of 5 mm, for example, H2 = 485 mm.

Reference numerals 24, 24 denote left and right steps for getting on and off, respectively, provided on the left and right side surfaces of the rear vehicle body 21, respectively. As shown in FIGS.
It is formed as a bent plate having an upper surface 24A and an inclined surface 24B inclined downward from the upper surface 24A.
4A is a scaffold for getting on and off. The step 24 for getting on and off is fixed to the inclined surface 21C1 of the side plate 21C by means of welding or the like with the upper end side inserted into the square hole 21E, so that the left and right sides of the rear body 21 are It is located in the right front corner.

25, 25 are the floor plate 22 and the step 2 for getting on and off.
4 and left and right auxiliary steps provided on both the left and right sides of the rear body 21, respectively. These auxiliary steps 25, as shown in FIG. 3 and FIG. By being bent, it is composed of a flat plate 25A having a substantially triangular shape and a vertical plate 25B rising vertically upward from the horizontal plate 25A.

The auxiliary step 25 includes a horizontal plate 25
A is fixed to the upper end of the step portion 21F of the rear vehicle body 21 by welding or the like, and the upper end of the vertical plate 25B is fixed to the notch 22B of the floor plate 22 by welding or the like, so that the upper side of each step 24 for getting on and off. Located to the left of the rear body 21,
The upper surface 25 of the horizontal plate 25A is disposed in the right front corner.
C is a foothold for getting on and off.

The height A from the ground G to the upper surface 24A of the step 24 is 200 mm ≦ A ≦ 67.
The value is set in a range of 5 mm, for example, A = 365 mm. The height B from the upper surface 24A of the step 24 for getting on and off to the upper surface 25C of the auxiliary step 25 (horizontal plate 25A) is set to a value in a range of 300 mm ≦ B ≦ 400 mm, for example, B = 365 mm. The height C from the upper surface 25C of the auxiliary step 25 to the upper surface 22A of the floor plate 22 is set to a value in a range of 25 mm ≦ C ≦ 100 mm, for example, C = 100 mm. Further, the upper surface 25C of the auxiliary step 25 is moved from the upper surface
The height dimension H3 up to A is 400 mm ≦ H3 ≦ 600 m
The value of m is set to, for example, H3 = 585 mm.

Further, the horizontal plate 25A of the auxiliary step 25
The side end portion 25D of the rear body 21 is
It forms a plane substantially the same as the inclined surface 21C1 of 1C, and the length of the side end 25D protruding from the side plate 21C is zero.

Accordingly, the auxiliary step 25 is continuous between the step 24 for getting on and off and the floor board 22 from the step 24 for getting on and off, and the operator M uses the step 24 for getting on and off and the auxiliary step 25 to make the driver's seat 10. It is configured that the getting on and off operation when getting on and off the vehicle can be performed quickly and safely.

As shown in FIG. 4, the side end 24C of the getting-on / off step 24 protrudes from the side plate 21C of the rear vehicle body 21 by the protruding length S.
Is the projection length L of the front side pressure roller 6 from the side plate 21C.
(S <L).

Therefore, during the pavement work on the road surface using the road roller, the step 24 for getting on and off and the auxiliary step 25 are
The structure is such that collision with obstacles such as fences erected on the road surface can be suppressed, and the safety of pavement work can be enhanced.

The small-sized road roller according to the present embodiment has the above-described configuration. The basic operation of running the road roller to compact the paving material or the like spread on the road surface is the same as the conventional operation described above. There is no particular difference from technology.

According to the present embodiment, however, by providing the auxiliary step 25 on the rear body 21 between the floor plate 22 and the step 24 for getting on and off, the operator M
Has been improved so that the driver can get on and off the driver's seat 10 quickly and easily.
The operation when getting on and off 0 will be described.

First, when getting into the driver's seat 10, the operator M steps on the step 24 for getting on and off, the auxiliary step 25, and the floor plate 22 sequentially from the ground G,
Get on.

In this case, since the step 24 for getting on and off and the auxiliary step 25 are continuous in a stepwise manner, the operator M
Are the step 24 for getting on and off, the auxiliary step 25, the floorboard 22
Driver's seat 1 easily and quickly
You can get on zero.

On the other hand, when getting off the driver's seat 10, the operator M turns his back to the driver's seat 10, for example.
After sequentially stepping on the auxiliary step 25 and the getting on / off step 24 from the floor plate 22, the user descends on the ground G.

In this case, since the step 24 for getting on and off, the auxiliary step 25 and the floor plate 22 are continuous in a step-like manner, the operator M looks at the auxiliary step 25 and the step 24 for getting on and off from the floor plate 22 while checking these auxiliary steps. Step 25,
By securely stepping on the getting-on / off step 24, it is possible to get down on the ground G quickly and safely.

Further, the respective height dimensions A, B, and C are set to A = 200 to 675 mm and B = 300 to 400 m, respectively.
m, C = 25-100 mm, the driver's seat 10
When getting on or off the vehicle, the operator M steps between the ground G and the getting on / off step 24, between the getting on / off step 24 and the auxiliary step 25, and between the auxiliary step 25 and the floor plate 22 with a relatively small stride. Can be. This allows
In addition to reducing the fatigue of the operator M when getting on and off the driver's seat 10, for example, a female operator with a small stride can easily get on and off the driver's seat 10.

Next, the operator M sitting in the driver's seat 10
Performs a pavement operation in which the road roller is driven by operating the steering device 13 and the like, and the pavement material is compacted by the front-side pressure roller 6 and the rear-side pressure roller 8.

In this case, the height H2 from the upper surface 22A of the floor plate 22 to the upper surface 10A of the driver's seat 10 is H2 = 300.
５ 575 mm, so the driver's seat 1
It is possible to secure a large field of view for the operator M seated at 0 to check around the road roller, and to suppress vibration transmitted to the operator M seated on the driver's seat 10 when the road roller starts and stops. it can.

Next, when the operator M paves the left side of the road, for example, the operator M sits on the left side of the driver's seat 10 and, as shown in FIG.
The steering device 13 and the like are operated with the left foot placed on the upper surface 25C of 5 (the horizontal plate 25A).

In this case, the upper surface 25C of the auxiliary step 25
H3 from driver to upper surface 10A of driver's seat 10 is H
3 = 400-600 mm, the operator M
While sitting on the left side of the driver's seat 10, the upper surface 25C of the left auxiliary step 25 is held in a comfortable posture with the left foot extended.
Can be reliably stepped on.

For this reason, for example, in order to monitor the left end of the front side pressure roller 6, when the operator M operates the steering device 13 while leaning on the upper body from the left end of the driver's seat 10, the operator M needs to use his left foot. By stepping on the assisting step 25 in an extended and comfortable posture, the body can be kept stable. Thereby, the fatigue of the operator M during the pavement work can be reduced, and the workability can be improved.

Then, the paving work on the left side of the road surface is completed,
When the operator M gets off from the driver's seat 10, the operator M stands up from the driver's seat 10 while stepping on the auxiliary step 25 with his left foot, and moves from the floor plate 22 to the auxiliary step 2.
Since the operation of stepping on step 5 can be omitted and stepping on to step 24 for getting on and off can be performed, it is possible to get down to the ground G quickly.

Further, when performing pavement work on the right side of the road surface, the operator M, for example, monitors the right end of the front-side compaction roller 6 and turns the steering device 13 while leaning on the upper body from the right end of the driver's seat 10. To operate,
The operator M can step on the right auxiliary step 25 in a comfortable posture with his right leg extended while sitting in the driver's seat 10, and can maintain his / her body stability in this comfortable posture. Thus, fatigue of the operator M can be reduced, and workability can be improved.

Then, the paving work on the right side of the road surface is completed,
When the operator M gets off from the driver's seat 10, the operator M stands up from the driver's seat 10 while stepping on the auxiliary step 25 with the right foot, and starts the auxiliary step 2 from the floor plate 22.
The step of step 5 can be omitted and the step 24 for getting on and off can be stepped on, so that it is possible to get down to the ground G quickly.

In the above-described embodiment, the case where auxiliary steps 25 made of a member different from the floor plate 22 are provided on both the left and right sides of the rear body 21 has been described as an example, but the present invention is not limited to this. Instead, for example, the auxiliary step may be formed by bending the left and right sides of the floor plate 22 downward.

In the above-described embodiment, the front vehicle body 2 provided with the front-side pressure roller 6 and the rear-side pressure roller 8
Is provided as an example, the load roller is swingably connected to the rear vehicle body 21 via the connecting device 3, but the present invention is not limited to this. For example, the front-side pressure roller 6 and the rear-side The present invention can also be applied to a load roller in which the rolling roller 8 is provided on a single vehicle body.

Further, in the above-described embodiment, the case where the rear-side pressure roller 8 is constituted by four rubber rollers 8A has been described as an example, but the present invention is not limited to this. A rear pressure roller made of a similar iron wheel may be used.

[0067]

As described in detail above, according to the first aspect of the present invention, the auxiliary body is provided between the floor plate and the step for getting on and off the vehicle body of the road roller.
The operator can step with a small stride between the ground and the step for getting on and off, between the step for getting on and off and the auxiliary step, and between the auxiliary step and the floor board, and quickly and safely get on and off the driver's seat. be able to. In this case, since the height dimension B from the upper surface of the step for getting on and off to the upper surface of the auxiliary step is set in the range of 300 mm ≦ B ≦ 400 mm, the getting on and off operation between the step for getting on and off and the auxiliary step can be easily performed. It is possible to get on and off the driver's seat quickly and safely.

The height H3 from the upper surface of the auxiliary step to the upper surface of the driver's seat is 400 mm ≦ H3 ≦ 600 mm.
Is set in the range, the operator sitting on the driver's seat can step on the assisting step with a comfortable posture with his legs extended. For this reason, for example, even when an operator sitting in the driver's seat leans on the upper body in the left and right directions from the driver's seat to perform paving work, the operator can stabilize the body by stepping on the assisting steps in a comfortable posture. In addition, workability during paving work can be improved.

According to the second aspect of the present invention, the height H2 from the upper surface of the floor plate to the upper surface of the driver's seat is set to 300 mm ≦.
Since H2 ≦ 575 mm was set, the operator seated in the driver's seat can secure a large field of view to check the surroundings of the road roller during pavement work, and operate when the road roller starts and stops. Vibration transmitted to the operator sitting in the seat can be suppressed.

According to the third aspect of the present invention, the length of the auxiliary step protruding from the side of the vehicle body is set to be smaller than the length of the step for getting on and off the vehicle from the side of the vehicle body. Step can be continued stepwise. For this reason, the operator can surely step on these steps while visually checking the step for getting on and off and the auxiliary step, and can get on and off the driver's seat quickly and safely.

Further, according to the fourth aspect of the present invention, the projecting lengths of the step for getting on and off and the auxiliary step from the side surface of the vehicle body are set smaller than the projecting length of the rolling roller from the side surface of the vehicle body. During paving work using rollers,
It is possible to prevent the step for getting on and off and the auxiliary step from colliding with an obstacle such as a fence erected on the road surface, and to enhance the safety during pavement work.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the load roller shown in FIG.

FIG. 3 is a perspective view of a main part showing the vicinity of a step for getting on and off and an auxiliary step in a rear vehicle body of the load roller according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of the step of getting on and off the rear vehicle body and the auxiliary step according to the embodiment of the present invention, as seen from the direction of arrows IV-IV in FIG.

FIG. 5 is a front view showing a conventional load roller.

FIG. 6 is a plan view of the load roller shown in FIG.

FIG. 7 is an enlarged perspective view of a main part of a rear body of a road roller according to a conventional technique, showing an area in the vicinity of a step for getting on and off;

FIG. 8 is a cross-sectional view of a main part of a step for getting on and off the rear vehicle body according to the prior art, as seen from the direction of arrows VIII-VIII in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Front body 6 Front-side compaction roller 8 Rear-side compaction roller 10 Driver's seat 10A Driver's seat upper surface 21 Rear body 22 Floor plate 22A Floor plate upper surface 24 Step for getting on and off 24A Upper surface for step for getting on and off 25 Auxiliary step 25C Auxiliary step Top of G Ground

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yoshiyoshi Hirasawa 650, Kandate-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. F-term in Tsuchiura Factory (reference) 2D052 AA03 AA04 AC01 AD01 AD11 BB01

Claims (4)

[Claims] 1. A vehicle body in which front and rear compaction rollers are rotatably provided, a driver seat provided on a floor plate of the vehicle body, and a side surface of the vehicle body for getting on and off the driver seat. A load roller comprising a step for getting on and off is provided, wherein a height dimension H1 from the ground to the upper surface of the floor plate is 700 m.
m ≦ H1 ≦ 1000 mm, an auxiliary step is provided on the vehicle body between the floor plate and the step for getting on and off, and the height dimension from the ground to the upper surface of the step for getting on and off is A, When the height from the upper surface of the step for getting on and off to the upper surface of the auxiliary step is B, and the height from the upper surface of the auxiliary step to the upper surface of the floor plate is C, the height B is 300 mm ≦ B. ≦ 400 mm, and the height H3 from the upper surface of the auxiliary step to the upper surface of the driver's seat is 400 mm ≦ H3 ≦ 600 m.
m. A load roller set in the range of m. 2. The load roller according to claim 1, wherein a height dimension H2 from an upper surface of the floor plate to an upper surface of the driver's seat is set in a range of 300 mm ≦ H2 ≦ 575 mm. 3. The road roller according to claim 1, wherein a length of the auxiliary step protruding from the side surface of the vehicle body is set to be smaller than a length of the auxiliary step protruding from the side surface of the vehicle body. . 4. A projecting length of said step for getting on and off and said auxiliary step from a side surface of said vehicle body is set smaller than a projecting length of said pressure roller from a side surface of said vehicle body. Or the load roller according to 3.