JPH0226006B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tire roller that can flatten a road horizontally and form a horizontal road surface in asphalt and other paving work. To provide a tire roller in which the front wheels and rear wheels do not follow the same track, causing no ruts, and which allows a driver's seat to be moved and turned to a position and direction that is easy to operate.

[Conventional technology]

BACKGROUND ART Tire rollers, which have a heavy vehicle body and a plurality of wide tires arranged in two rows in front and rear, have traditionally been used to pave road surfaces and compact roadbeds and roadbeds. These tire rollers flattened the road surface by moving back and forth on the road surface leveled by a bulldozer or the like. It was also widely used to solidify asphalt, etc. that had been removed. This tire roller had a plurality of wheels supported on each of the front and rear wheels, and was able to level the road surface by transmitting the weight of the vehicle body to the tires. In this case,
The number of tires on the front wheels and rear wheels was usually arranged in series, with an odd number and an even number, respectively, and the part left unpaved by the front wheels was compacted with the rear wheels to prevent digging in ruts. . For this reason, when the vehicle is being driven in a straight line, the rear wheels roll the part that the front wheels have left unpressed, and the road surface is evenly leveled and rolled, making it extremely efficient. Ta.

However, in conventional tire rollers, the front wheels are used for steering to change direction, and the rear wheels are used for driving. It was steered by a chisel. For this reason, when rolling around a curved road or a semi-circular section of sidewalk at an intersection, the multiple rows of tires on the front wheels line up almost in a straight line to change direction, so the rear wheels turn against the front wheels. The vehicle did not follow the steering of the vehicle, and the rear wheels would again roll over the area that had been rolled by the front wheels, resulting in the formation of ruts. For this reason, conventional tire rollers have the disadvantage that they cannot be rolled evenly for steering purposes on curved portions of the road. In addition, tire rollers are wide and located high, making it difficult for drivers to grasp the position of the front and rear wheels, especially when rolling on road shoulders or edges. It was not possible to accurately grasp the rolling position.

[Problem that the invention seeks to solve]

To solve the above-mentioned drawbacks, in the present invention, the steering of the front and rear wheels is made independent to prevent the formation of ruts due to the difference between the inner wheels of the front and rear wheels, and to evenly roll pressure on the road surface. The seats are designed to provide a good view of the rolling area from the seat.

[Means for solving problems]

In view of the above-mentioned drawbacks, the present invention provides a vehicle body that can house and move an engine, a drive mechanism, etc., a front wheel mechanism having a plurality of front wheels pivotably supported at the front of the vehicle body, and a front wheel mechanism having a plurality of front wheels pivotably supported at the rear of the vehicle body. In a tire roller consisting of a rear wheel mechanism having a rear wheel, a front wheel steering mechanism that independently controls the front wheel mechanism, and a rear wheel steering mechanism that independently controls the rear wheel mechanism, the front wheel steering mechanism and the rear wheel steering mechanism are operated. A control means that can synchronize the angles and steer in opposite directions, a guide rail fixed on the vehicle body in a direction perpendicular to the direction of travel, and a control means that is placed on this guide rail and is horizontally steered in the left and right direction of the vehicle body. A movable movable platform, a moving means for moving the movable platform along a guide rail, a swivel platform provided on the movable platform and capable of horizontally rotating, and an operation device fixed on the swivel platform on which a driver sits. a seat, a drive means for horizontally rotating the swivel base together with the driver's seat, a first switching means provided on the swivel base for selecting the direction of movement of the vehicle body between forward and backward; a switching means for operating the driving means in response to an instruction from the switching means to orient the swivel base in the moving direction; and a second switching means provided on the swivel base for selecting the direction of movement of the movable base from either left or right. and a switching means for operating the moving means in response to instructions from the second switching means to move the moving platform to one of the left and right sides of the vehicle body, and when the vehicle body is moved by steering, the control means switches the front wheel steering The front wheel and rear wheel steering mechanism are controlled respectively to steer the front wheels and rear wheels in opposite directions to turn the vehicle body on the same arc, and the driver's seat is operated by operating the first switching means to operate the drive means. is directed in the moving direction, and the second switching means is operated to operate the moving means to move the moving platform to one of the left and right sides of the vehicle body on the guide rail, thereby changing the field of view of the driver's seat to the side of the vehicle body. The present invention provides a tire roller that is characterized by being directed toward.

[Effect]

In the present invention, since the front wheel mechanism that supports a plurality of tires and the rear wheel mechanism that supports a plurality of tires can be operated for steering,
A plurality of tires arranged in a straight line on the front wheel mechanism and a plurality of tires arranged in a straight line supported by the rear wheel mechanism can be freely steered. When changing direction, the front wheel mechanism and rear wheel mechanism can be synchronized and steered in opposite directions. For this reason, the rear wheel mechanism can move in a trajectory that deviates from the trajectory of the front wheel mechanism on the road, so the vehicle body is not dragged by the front wheel control, and the rear wheels move over the ruts of the front wheels. Since the rear wheels can reliably roll the portion where the front wheels have not stepped on the road without rolling, uniform rolling can be performed over the entire curved portion of the road. Additionally, the driver's seat can face toward the front or rear of the vehicle, allowing the driver's line of sight to match the direction in which the vehicle is being driven. Furthermore, the driver's seat can be moved to one side of the vehicle body according to the driver's selection, making it easier to ensure visibility. and,
The driver's seat can be moved to either the right or left side of the vehicle body, so you can check the trajectory of the tires when compacting the edge of the road, so you can check detailed work while driving.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a side view showing the tire roller of this embodiment, Figure 2 is a perspective view of the same as above, Figure 3 is a perspective view of the steering mechanism seen through the vehicle body, and Figure 4 is a turning system with a driver's seat. It is an exploded perspective view showing a drive mechanism of a stand.

The vehicle body 1 has a slightly rectangular shape, and the engine, oil pressure generating mechanism, oil tank, ballast, etc. are built into the interior, and the front lower part is largely gouged out to form the wheel storage area 2. cage, car body 1
The rear lower surface was similarly gouged out and the wheel storage area 3
is formed. At the front lower part of the vehicle body 1, a front wheel mechanism 4 is provided located in the space inside the wheel storage part 2, and at the rear lower part of the vehicle body 1,
A rear wheel mechanism 5 is provided within the space of the wheel storage section 3.

The front wheel mechanism 4 consists of four wide front wheels 6, which are supported on the same axis, and the shaft is supported by a fork 7 that is slightly U-shaped. Although not shown, a hydraulic motor is provided on the shaft of the front wheel 6. A support shaft 8 is fixed to the upper center surface of this fork 7.
This support shaft 8 is rotatably supported on the vehicle body 1.
Therefore, the row of front wheels 6 can be steered horizontally in a straight line with this support shaft 8 as the center of rotation. A lever 9 is connected to this support shaft 8, and a cylinder rod 11 of a hydraulic cylinder 10 for steering is connected to the lever 9. Further, the rear wheel mechanism 5 is composed of five wide rear wheels 12, and these rear wheels 12 are supported on the same shaft, and this shaft has a U-shaped fork 13.
Although not shown, a hydraulic motor is provided between the rear wheels 12, and the rear wheels 12 are rotated by this hydraulic motor.

A support shaft 14 is provided at the center of the upper part of the fork 13, and this support shaft 14 is rotatably supported in the horizontal direction with respect to the vehicle body 1, and the rear wheel 12 is moved in a straight line by this support shaft 14. I am now able to take control of the situation. Further, a lever 15 is connected to the support shaft 14, and a cylinder rod 17 of a hydraulic cylinder 16 for steering is connected to this lever 15. A pair of guide rails 18 are provided at the center of the upper surface of the vehicle body 1, facing in the right and left directions of the vehicle body 1.
An auxiliary rail 19 is provided parallel to the guide rail 18 at a position slightly apart from the guide rail 18.

A disk-shaped swivel base 20 is mounted on the upper part of the guide rail 18 so as to be movable left and right and rotatable. At the rear of the upper surface of this swivel base 20 is a driver's seat 21 where the driver sits. There is a driver's seat 2
A handle 22 is pivotally supported in front of the driver's seat 21, and pedals 23 are provided on the left and right sides of the handle 22, and when the driver's seat 21 is positioned to the side, an operating lever 24 protrudes from the swivel base 20. There is. This operating lever 24 is used to set the direction of movement of the vehicle body 1, and can select neutral, forward, or backward.
Further, a moving lever 25 is protruded on the side of the driver's seat 21 of the swivel base 20.
This allows one part of the swivel base 20 to be changed, and neutral, right, and left sides can be selected.

Next, the configuration of the swivel base 20 will be explained with reference to FIGS. 4 and 5.

A guide rail 18 is provided parallel to the upper surface of the vehicle body 1.
is fixed, and a transfer table 26 is positioned above the guide rail 18. A pair of triangular legs 27 are fixed at a distance from each other on the lower surface of the transfer table 26, and rollers 28 whose rotating shafts are horizontal are respectively supported on the legs 27.
A roller 29 is pivotally supported below the leg 27 and has a vertical axis of rotation.
8 is located on the inner surface of the guide rail 18, and the rollers 29
is brought into contact with the outer wall of the guide rail 18.
A pair of support members 30 are fixed to the upper surface of the transfer table 26 at a distance, a flat table 31 is placed on the support members 30, and a ring-shaped table 31 is placed on the upper surface of the table 31. A shaft support member 32 with a shape is placed thereon.

A bearing 33 is disposed on the outer periphery of the shaft supporting member 32, and a driven gear 34 is rotatably fitted in the outer periphery of the shaft supporting member 32.
The rotating base 20 is placed on the driven gear 34. Further, a hydraulic motor 35 is fixed to the lower surface of the side of the table 31, and this hydraulic motor 35
The driving gear 36 rotated by the driven gear 3
It is aligned with 4. In addition, the guide rail 18
A pedestal 37 is fixed on the vehicle body 1 and located between the auxiliary rail 19 and the pedestal 19. A shaft 38 is vertically fixed to the pedestal 37, and a gear 39 connected vertically to the shaft 38 is fixed to the pedestal 37. and 40 are rotatably inserted. A rack 41 is fixed to the side surface of the support member 30, and a gear 39 is meshed with the rack 41. In addition, the auxiliary rail 19 has rollers 4
3 and 44 are connected to each other, and a drive body 42 is provided which can freely move in the length direction thereof, and a rack 45 that meshes with the gear 40 is fixed to the side surface of this drive body 42. A hydraulic cylinder 46 is fixed to the vehicle body 1 by means not shown above the drive body 42.
A cylinder rod 47 of this hydraulic cylinder 46 is connected and fixed to the drive body 42 by a connecting piece 48.

Next, to explain the hydraulic system with reference to FIG. 6, the suction side of a hydraulic pump 52 driven by an engine 51 is connected to an oil tank 50 filled with pressure oil, and the discharge side of the hydraulic pump 52 is connected to the oil tank 50 filled with pressure oil. The vehicle is connected to a switching valve 53 that switches the traveling direction of the vehicle 1, and hydraulic motors 54 and 55 that drive the front wheels 6 and the rear wheels 12 are connected to the switching valve 53, respectively. In addition, the hydraulic pump 52 has a solenoid valve 5.
6 is connected to the electromagnetic valve 56, and the hydraulic motor 35 is connected to the solenoid valve 56. Similarly, a switching valve 57 for direction control controlled by the handle 22 is also connected to the hydraulic pump 52. The switching valve 57 is connected to the hydraulic cylinder 1.
0 and 16 are connected in series.

Next, detection microswitches 58 and 59 are provided near the operating lever 24 on both the left and right sides of the direction control side, and the outputs of the microswitches 58 and 59 are conducted to a control device 60. There is. Further, the swivel base 20 rotated by the hydraulic motor 35 has an operating pin 61 at its lower part.
Micro switches 62 and 63 are provided at opposing positions on the table 31 and are operated by the operating pin 61, and the outputs of the micro switches 62 and 63 are connected to the control device 6.
0 is being input. The control output of this control device 60 is the electromagnetic coil 64, 6 of the electromagnetic valve 56.
5, respectively. Next, the output of the hydraulic pump 52 is controlled by the switching valve 66 by the moving lever 25, and the hydraulic cylinder 46 is connected to the switching valve 66.

Next, the operation of the present invention will be explained.

(When the vehicle body 1 moves forward) In FIG. 4, when the operating lever 24 is at position a, it is in a neutral state, and the vehicle body 1 remains stopped at that position and does not move. In order to move the vehicle body 1 forward, the vehicle body 1 is moved forward by pushing the operating lever 24 to position b. That is, when the operating lever 24 is pushed in the direction b, the switching valve 53 is switched, and the hydraulic pressure from the hydraulic pump 52 driven by the engine 51 is transmitted to the hydraulic motors 54 and 55, respectively, via the switching valve 53. , hydraulic motors 54 and 55 are used for front wheels 6 and rear wheels 12, respectively.
, the vehicle body 1 moves forward.

(When moving the vehicle body 1 backward) In order to move the vehicle body 1 backward, use the operating lever 24.
is temporarily returned to the neutral position a from position b, and then pulled to position c. Therefore, the switching valve 53 switches to the opposite direction, and the hydraulic pressure supplied from the hydraulic pump 52 flows in the opposite direction.
The front wheels 6 and rear wheels 12 driven by the hydraulic motors 54 and 55 rotate in the opposite direction to that described above. At this time, the micro switch 58 is pushed depending on the position of the operating lever 24, and the vehicle body 1
detects that the vehicle has started moving backward, and transmits the signal to the control device 60. Therefore, the control device 60 transmits a signal to the electromagnetic coil 65, controls the electromagnetic valve 56, and supplies hydraulic pressure to the hydraulic motor 35. Therefore, the driving gear 36 is rotated by the hydraulic motor 35, and the driven gear 34 meshing with the driving gear 36 rotates around the shaft support member 32. and,
The swivel base 20 mounted on the driven gear 34 will also rotate in the same way, the swivel base 20 will rotate 180 degrees counterclockwise in FIG. 4, and the driver's seat 21 will face toward the rear of the vehicle body 1. Become.

Then, when the swivel base 20 rotates 180 degrees,
The operating pin 61 pushes the micro switch 63,
It is detected that the microswitch 63 has moved to a predetermined position, and a signal from the microswitch 63 is transmitted to the control device 60. As a result, the current flowing through the electromagnetic coil 65 stops and the electromagnetic valve 56 returns to its neutral state, so the hydraulic motor 35 stops in that state and the swivel base 20
stops its operation at a position rotated 180 degrees in FIG. For this reason, the driver's seat 21 faces in the same direction as the direction in which the vehicle body 1 is moving backwards, so the driver, while sitting in the driver's seat 21, faces the direction in which the vehicle body 1 is moving backwards and turns his head toward the rear. The vehicle body 1 can be driven in the direction of the line of sight without any problems.

(Road compaction in the straight direction) As mentioned above, by operating the control lever 24, the vehicle body 1 moves forward and backward, and the weight of the vehicle body 1 is transmitted to the front wheels 6 and rear wheels 12, and the weight of the vehicle body 1 is transmitted to the front wheels 6 and the rear wheels 12. The road surface is compressed by the rear wheels 12. The arrangement of the front wheels 6 and rear wheels 12 when the vehicle body 1 moves forward and backward is as shown in FIG. That is, the total width of the four front wheels 6 is narrower than the total width of the five rear wheels 12, and each rear wheel 1
Each front wheel 6 is located between two intervals, and the front wheels 6 and rear wheels 12 are arranged alternately. Therefore, as the vehicle body 1 moves forward and backward, the road surface is compacted evenly and evenly, and the roadbed and asphalt surface are finished flat, and this compaction work is performed using the full width L of the rear wheels 12. It can be carried out.

(When steering the vehicle body 1) Steering the vehicle body is performed by operating the handle 22. By operating the handle 22, the switching valve 57 is switched, and the hydraulic cylinder 1
Oil pressure is supplied to 0 and 16. Therefore, the hydraulic cylinders 10 and 16 can extend and retract the cylinder rods 11 and 17 according to the amount of hydraulic pressure supplied, and the amount of expansion and contraction of the cylinder rods 11 and 17 is transmitted to the levers 9 and 15, and the support shaft 8 ,14
Swirl. For this reason, the forks 7 and 13 connected to the support shafts 8 and 14 rotate horizontally, respectively, and the front wheels 6 and rear wheels 12, which are supported by the forks 7 and 13, are centered around the support shafts 8 and 14. The direction of travel of the vehicle body 1 can thereby be steered.

At this time, since the hydraulic cylinders 10 and 16 are connected in series, if the cross-sectional areas of the hydraulic cylinders 10 and 16 are the same, each cylinder rod 1
Since the amount of expansion and contraction of 1 and 17 is the same, the support shafts 8 and 14
The respective rotation angles are the same, and the directions in which the support shafts 8 and 14 are rotated are respectively opposite directions. Therefore, as shown in FIG. 8, the distances from the X point where the extension line of the rotation axis of the front wheel 6 and the extension line of the rotation axis of the rear wheel 12 intersect to the support shafts 8 and 14 are the same, and this X point Since the front wheels 6 and rear wheels 12 rotate around the center, the part where the front wheels 6 are not rolling is the rear wheel 1.
2 will be rolled, and the distance L between the left and right ends of the rear wheels 12 will be an arcuate width, resulting in uniform rolling. At this time, the vehicle body 1 is not dragged by the steering of the front wheels, and is smoothly steered about the same point X as described above.

(When moving the machine forward again) In the above, we explained the operation when moving the machine backward.
Next, when switching to forward movement again, the operating lever 24 is switched from direction c to b, thereby switching the switching valve 53, and at the same time, the micro switch 59 detects the position of the operating lever 24 and transmits it to the control device 60. A current is applied to the electromagnetic coil 64 to operate the electromagnetic valve 56. Therefore, hydraulic pressure is supplied to the hydraulic motor 35, and the hydraulic motor 35 operates in the opposite direction to the above-mentioned direction, and the driving gear 36 and the driven gear 34
The swivel base 20 is rotated clockwise in FIG. 4 by rotating the swivel base 20 by 180 degrees.

When the swivel base 20 rotates 180 degrees, the operating pin 61 fixed to the swivel base 20 activates the micro switch 6.
2 is activated, thereby informing the control device 60 that the swivel base 20 has rotated 180 degrees. Therefore, the control device 60 stops the current transmitted to the electromagnetic coil 64, stops the electromagnetic valve 56 in a neutral state, and stops the swivel base 20 at its 180 degree rotated position.
For this reason, the driver's seat 21 stops in a position facing the front of the vehicle body 1, and the driver can look in the direction of travel of the vehicle body 1 while sitting in the driver's seat 21, and there is no need to change his posture while driving. .

(When compacting the road shoulder) While driving the vehicle body 1, the vehicle body 1 may be moved to a corner of the road, and the front wheels 6 and rear wheels 12 may be brought close to the road shoulder to compact the road shoulder. At this time, since the vehicle body 1 is high and wide, the positions of the front wheels 6 and rear wheels 12 cannot be determined from the driver's seat 21, so the front wheels 6 and rear wheels 12 may run onto the shoulder of the road, or the vehicle may not be pressed properly. become. For this reason, the moving lever 2
5 in the direction of the road shoulder where the vehicle body 1 approaches, the switching valve 66 is switched and hydraulic pressure is supplied to the hydraulic cylinder 46. Cylinder rod 4 of hydraulic cylinder 46
7 extends and moves the driving body 42 along the auxiliary rail 19 while rolling the rollers 43 and 44.

Since a rack 45 is fixed to this driving body 42, the movement of the driving body 42 causes the rack 45 to move towards the gear 40.
is rotated, and the gear 39 is also driven at the same time. Therefore, the rack 41 meshed with the gear 39 is moved, and as the rack 41 moves, the support member 30 and the transfer table 26 move the vehicle body 1 along the guide rail 18 while rolling the rollers 28 and 29. The upper surface is moved, and the swivel base 20 and driver's seat 21 are also moved to one side of the vehicle body 1. Therefore, the swivel base 20 moves to one side of the vehicle body 1, as shown in FIG. 9, and the driver's seat 21 moves to a position where the side surface of the vehicle body 1 is visible. The swivel base 20 is the vehicle body 1
When the rotating base 20 is close to one side, the moving lever 25 is set to neutral, the supply of hydraulic pressure by the switching valve 66 is stopped, and the swivel base 20 is held at that position. In the state shown in FIG. 9, the positional relationship between the road shoulder, the front wheels 6, and the rear wheels 12 can be clearly visually determined from the driver's seat 21, and the approaching situation can be adjusted while operating the steering wheel 22. Note that the driver's seat 21 can be returned to the center of the vehicle body 1 by tilting the moving lever 25 in the opposite direction to that described above and operating the hydraulic cylinder 46.

〔Effect of the invention〕

Since the present invention is constructed as described above, when the combination of front wheels and rear wheels is used to roll compaction on a road surface like a tire roller, the rear wheels do not directly step into the ruts of the front wheels when steering the vehicle body. This means that the rear wheels will roll the parts that are not rolled by the front wheels, and even if the road surface is curved or the corner of an intersection is rolled, rolling will not occur due to the difference between the inner wheels of the front and rear wheels. This allows for an extremely uniform finish with no leftover parts.

Further, since the driver's seat rotates according to the driving direction of the vehicle body, the driver's line of sight always faces straight in the driving direction, and the driver is not required to take an unreasonable posture. Furthermore, when carrying out work with the vehicle close to the road shoulder, the swivel platform on which the driver's seat is fixed can be moved to one side of the vehicle, improving visibility for the driver and improving the visibility of the front and rear wheels. Because the wheels and the corners of the road can be brought as close as possible, there are fewer areas left with compaction, allowing for more accurate work.

[Brief explanation of drawings]

Fig. 1 is a side view of a tire roller according to an embodiment of the present invention, Fig. 2 is a perspective view of the same as above, Fig. 3 is a three-dimensional view of the vehicle body showing the steering configuration, and Fig. 4 is a swivel table. Figure 5 is an exploded perspective view showing the surrounding mechanism, Figure 5 is a sectional view showing the support part of the swivel base, Figure 6 is a hydraulic piping diagram showing the control mechanism, and Figure 7 is a diagram showing the wheels and rolling pressure when the vehicle body is traveling straight. FIG. 8 is an explanatory diagram showing the width, FIG. 8 is an explanatory diagram showing the state of rolling pressure by the wheels when the vehicle body is steered, and FIG. 9 is an explanatory diagram showing the state of rolling the road shoulder. 1...Vehicle body, 4...Front wheel mechanism, 5...Rear wheel mechanism, 6...Front wheel, 7,13...Fork, 8,1
4... Support shaft, 9, 15... Lever, 10, 16...
... Hydraulic cylinder, 11, 17 ... Cylinder rod, 12 ... Rear wheel, 18 ... Guide rail, 20
...Swivel base, 21...Driver's seat, 24...Operation lever, 25...Movement lever.

Claims (1)

[Scope of Claims] 1. A vehicle body that can house and move an engine, a drive mechanism, etc., a front wheel mechanism having a plurality of front wheels pivoted at the front of the vehicle body, and a plurality of rear wheels pivoted at the rear of the vehicle body. In a tire roller consisting of a rear wheel mechanism that independently controls the front wheel mechanism, a front wheel steering mechanism that independently controls the front wheel mechanism, and a rear wheel steering mechanism that independently controls the rear wheel mechanism, A control means that can steer in opposite directions in synchronization with each other, a guide rail fixed on the vehicle body in a direction perpendicular to the direction of travel, and a guide rail that is placed on this guide rail and can be moved horizontally to the left and right of the vehicle body. A movable base, a moving means for moving the movable base along a guide rail, a swivel base provided on the movable base and capable of rotating in a horizontal direction, and a driver's seat fixed on the swivel base for a driver to sit on. , a driving means for horizontally rotating the swivel base along with the driver's seat, a first switching means provided on the swivel base and capable of selecting the direction of movement of the vehicle body between forward and forward movement, and the first switching means. a switching means for operating the drive means in response to an instruction from the swivel base to orient the swivel base in the moving direction; and a second switching means provided on the swivel base for selecting the moving direction of the movable base to either the left or right direction; and a switching means for operating the moving means in response to instructions from the second switching means to move the moving platform to one of the left and right sides of the vehicle body, and when the vehicle body is steered during movement, the control means is connected to the front wheel steering mechanism. The rear wheel steering mechanism is controlled respectively to steer the front and rear wheels in opposite directions to turn the vehicle body on the same arc, and the driver's seat is moved by operating the drive means by operating the first switching means. further, by operating the second switching means to operate the moving means, the moving platform is moved to one of the left and right sides of the vehicle body on the guide rail,
A tire roller that directs the driver's seat's field of view to the side of the vehicle.