JPS6233907A - Tire roller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tire roller that can horizontally roll a road and form a horizontal road surface in asphalt or other pavement work. To provide a tire roller in which the front wheels and rear wheels do not walk on the same track and do not form ruts.

[Conventional technology]

Conventionally, multiple wide tires are mounted on a heavy vehicle body in order to pave road surfaces and compact roadbeds and roadbeds.
Tire rollers set up in rows were used. These tire rollers were widely used to flatten road surfaces by reciprocating on road surfaces leveled by bulldozers and the like, and to tamp down scattered asphalt and the like. This tire roller had multiple wheels on each 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 is usually arranged in series in an odd number and an even number, respectively, and the part left unpressed by the front wheels is compacted by the rear wheels, which is devised to prevent ruts from being dug. It was customary. For this reason, when the vehicle is being driven in a straight line, the rear wheels roll the part left unpressed by the front wheels, 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 front tires are aligned almost in a straight line to change direction, so the rear wheels steer the front wheels. As a result, the rear wheels were forced to reroll 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 evenly rolled for steering purposes on curved portions of the road.

[Problem that the invention seeks to solve]

Due to these problems, in the past, it was necessary to use small compaction equipment on curved sections or use drum-shaped wheels such as magadam rollers to compact the road surface. . In order to overcome this drawback, in the past, the center of the body of the Magadam roller was connected with a pin, and the front and rear parts of the body could be bent horizontally by this pin, and the front wheel Some cars were designed to prevent the rear wheels from rolling over ruts, but important parts such as the engine, drive mechanism, and steering mechanism were placed in the center of the car body in order to connect the center of the car body with a pin. This was extremely disadvantageous in terms of design.

[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 with a rear wheel, the front wheel mechanism and the rear wheel mechanism can be independently steered, and by steering the front wheel mechanism and the rear wheel mechanism in opposite directions synchronously, the vehicle body can be controlled. To provide a tire roller that can change direction.

[Effect]

In the present invention, since the front wheel mechanism that pivotally supports a plurality of tires and the rear wheel mechanism that pivotally supports a plurality of tires can each be moved for steering, It is possible to freely steer a plurality of tires arranged in a straight line that are supported by the tires and the rear wheel mechanism.

When changing direction, the front and rear wheel mechanisms can be synchronized to steer 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 steering of the front wheels, and the rear wheels roll over the ruts of the front wheels. Since the rear wheels can reliably roll the portion where the front wheels have not pressed down, even curved portions of the road can be rolled uniformly over the entire surface.

〔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 side view showing the tire roller of this embodiment;
The figure is a perspective view of the same as the above, Figure 3 is a perspective view of the steering mechanism seen through the vehicle body, Figure 4 is an exploded perspective view of the drive mechanism of the swivel base equipped with the driver's seat, and Figure 5 is a perspective view of the hydraulic system. FIG.

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 sandwiched and contains the wheel storage area 2.
, and the rear lower surface of the vehicle body 1 is also largely sandwiched to form a wheel storage portion 3 . 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 axis is supported by a fork 7 that is slightly U-shaped, as shown in the figure. Although not included, a hydraulic motor is provided on the shaft of the front wheel 6. A support shaft 8 is fixed to the upper central surface of the fork 7, and the support shaft 8 is rotatably supported on the vehicle body 1. Therefore, the row of front wheels 6 can be steered in a straight line in the horizontal direction 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 consists of five wide rear wheels 12, and these rear wheels 12 are supported on the same shaft, and this shaft is supported on 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 3, and this support shaft I4 is rotatably supported in the horizontal direction with respect to the vehicle body l, and the rear wheel 12 is steered in a straight line by this support shaft 14. It is now possible to take it. 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. Further, a disk-shaped swivel base 18 is rotatably mounted on the top surface of the vehicle body 1, and a driver's seat 19 where the driver sits is provided at the rear of the top surface of the swivel base 18, and in front of the driver's seat 19. A handle 20 is pivotally supported on the handle 20, pedals 21 are provided on the left and right sides of the handle 20, and an operating lever 22 projects from a swivel base 18 at a position to the side of the driver's seat 19. This operating lever 22 is used to set the direction of movement of the vehicle body 1, and can select neutral, forward, or backward. To explain the turning mechanism of this turning table 18 with reference to FIG. 4, this turning table 1
8 is rotatably supported by a shaft, and a pinion gear 24 is fixed to the lower end of the pillar 23. A tooth 25 is engaged with the outer periphery of this pinion gear 24, and one end of this rank 25 is connected to a cylinder rod 27 of a hydraulic cylinder 26 for changing the direction of the driver's seat 19.

Next, an engine 32 is placed in the oil tank 31 filled with pressure oil.
The suction side of the hydraulic pump 33 driven by Hydraulic motors 35 and 36 driving the motors 12 and 12 are respectively connected. Further, a solenoid valve 37 is connected to the hydraulic pump 33, and the hydraulic cylinder 26 is connected to the solenoid valve 37. Also, a switching valve 3 for directional control controlled by the handle 20
8 is similarly connected to a hydraulic pump 33. This switching valve 38 is connected to the hydraulic cylinder 10.16.
are connected in series. Next, a detection microswitch 39, 40 is installed near the operating lever 22.
are provided on both the left and right sides of the direction control side, and the outputs of the microswitches 39 and 40 are connected to the control device 41.
is electrically connected. Further, an operating pin 42 is projected in the middle of the side surface of the cylinder rod 27 of the hydraulic cylinder 26, and microswitches 4 are operated by the operating pins 42 at both ends of the stroke of the cylinder rod 21, respectively.
3.44 is provided, and this micro switch 43.4
The output of No. 4 is input to the control word W41. and,
Control outputs of this control device 41 are connected to electromagnetic coils 45 and 46 of the electromagnetic valve 37, respectively.

Next, the present invention will be explained in detail.

(When the vehicle body 1 moves forward) In FIG. 4, when the operating lever 22 is in the position a, it is in a neutral state, and the vehicle body 1 remains stopped at that position and does not move. To move the vehicle body 1 forward, the vehicle body 1 is moved forward by pushing the operating lever to position b.

That is, when the operating lever 22 is pushed in the direction b, the switching valve 34 is switched, and the hydraulic pressure from the hydraulic pump 33 driven by the engine 32 is transmitted to the hydraulic motors 35 and 36 via the switching valve 34, respectively. 35
．． 36 rotates the front wheels 6 and the rear wheels 12, respectively, so that the vehicle body 1 moves forward.

(When moving the vehicle body 1 backward) In order to move the vehicle body 1 backward, the operating lever 22 is temporarily returned from the position b to the neutral position a, and then pulled to the position C. Therefore, the switching valve 34 is switched in the opposite direction, and the hydraulic pressure supplied from the hydraulic pump 33 flows in the opposite direction, and the front wheels 6 and rear wheels 12 driven by the hydraulic motors 35 and 36 are driven in the opposite direction. It will rotate to . At this time, the microswitch 39 is pressed depending on the position of the operating lever 22, detects that the vehicle body 1 has started moving backward, and transmits the signal to the control device 41. Therefore, the control device 41 transmits a signal to the electromagnetic coil 46, controls the electromagnetic valve 37, and supplies hydraulic pressure to the hydraulic cylinder 26. Therefore, the cylinder rod 27 of the hydraulic cylinder 26 is pushed out and pushes the rack 25, so the pinion 24 is driven, and the support shaft 23 and the swivel base 18, which are fixed to the pinion 24, move 180 degrees counterclockwise in FIG. degree rotation,
The driver's seat 19 faces toward the rear of the vehicle body 1.

When the cylinder rod 27 is pushed out and the swivel table rotates 180 degrees, the operating pin 42 presses the microswitch 44 to detect that it has moved to a predetermined position, and controls the signal of this microswitch 44. The information is transmitted to the device 41. As a result, the current flowing through the electromagnetic coil 46 stops and the switching valve 37 returns to its neutral state, so the hydraulic cylinder 26 remains in that state and stops, and the swivel base 18 is at the position rotated 180 degrees in FIG. Stop that operation. For this reason, the driver's seat 19 faces in the same direction as the direction in which the vehicle 1 is moving backwards, so the driver, while sitting in the driver's seat 19, can direct his eyes toward the direction in which the vehicle 1 is moving backwards and turn his head toward the rear. The vehicle body 1 can be driven in a direction without line of sight.

(Road compaction in the straight direction) As mentioned above, by operating the operating lever 22, 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. Front wheels 6 and rear wheels 12 when the vehicle body 1 moves forward and backward.
The arrangement is as shown in FIG. In other words, front wheels 6-4
The total width of the book is narrower than the total width of the five rear wheels 12, each front wheel 6 is positioned between the rear wheels 12, and the front wheels 6 and rear wheels 12 are arranged alternately. For this reason,
The road surface is compacted evenly and evenly by the forward and backward movement of the vehicle body l, and the roadbed and asphalt surface are finished flat, and this compaction work can be carried out over the entire width of the rear wheels 12.

(When steering the vehicle body 1) Steering the vehicle body is performed by operating the handle 20. By operating the handle 20, the switching valve 3
8 is switched and hydraulic pressure is supplied to the hydraulic cylinder 10.16. Therefore, the hydraulic cylinders 10, 16 can extend or retract the cylinder rod 11.17 depending on the amount of hydraulic pressure supplied, and the cylinder rod 11.17 can be extended or retracted.
The amount of expansion and contraction of 17 is transmitted to the lever 9.15 and the support shaft 8.14
Swirl. For this reason, the forks 7.13, which are connected to the support shafts 8.14, respectively rotate in the horizontal direction, and the front wheels 6 and rear wheels 12, which are supported on the forks 7.13, are pivoted on the support shafts 8.14.
．． 14 as the center, thereby making it possible to steer the traveling direction of the vehicle body 1. At this time, hydraulic cylinder 1
0.16 is connected in series, so each hydraulic cylinder 1
If the cross-sectional area of 0.16 is the same, the amount of expansion and contraction of each cylinder rod 11.17 is the same, so the support shaft 9.14
The rotation angles of each are the same, and the spindle 8.1
4 rotates in opposite directions. Therefore, as shown in FIG. 7, the extension line of the rotation axis of the front wheel 6 and the rear wheel
The distance from the X point where the extended lines of the rotation axes 2 and 2 intersect to the support shaft 8.14 is the same, and the front wheel 6,
Since the rear wheels 12 turn, the rear wheels 12 will roll the parts that are not rolled by the front wheels 6, and the space between the left and right ends of the rear wheels 12 will be an arc width, and the rolling will be uniform. become. 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 forward again) In the above, the operation when moving backward was explained, but when switching to forward again next time, move the operating lever 22 to C.
, the switching valve 34 is switched, and at the same time, the microswitch 40 is switched to the operating lever 2.
The position of the electromagnetic coil 4 is detected and transmitted to the control device 41.
5 to operate the solenoid valve 37. Therefore, hydraulic pressure is supplied to the hydraulic cylinder 26 and the cylinder rod 27 is drawn in the direction of the hydraulic cylinder 26. Therefore, the rack 25 connected to the cylinder rod 27 is connected to the pinion 24.
The spindle 23 and the swivel base 18 are rotated clockwise in FIG. 4, and the swivel base 18 is rotated 180 degrees. When the swivel base 18 rotates 180 degrees, the actuating pin 42 fixed to the cylinder rod 27 activates the microswitch 43, thereby informing the controller 41 that the swivel base 18 has rotated 180 degrees. Therefore, the control device 41 stops the current transmitted to the control coil 45, stops the solenoid valve 37 in a neutral state, and stops the swivel table 18 at its 180 degree rotated position. For this reason, the driver's seat 18 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 19, and there is no need to change his posture while driving. .

〔Effect of the invention〕

Since the present invention is configured as described in -F, the combination of tires on the front and rear wheels, like a tire roller, prevents the ruts on the front wheels when steering the vehicle body l when rolling compaction on a road surface. The wheels do not press down as they are, and the rear wheels roll the area that the front wheels have not rolled. Even when the road surface is curved or when rolling around the corner of an intersection, the difference between the inner wheels of the front and rear wheels causes There are no unrolled areas left, and an extremely uniform finish can be achieved.

[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. An exploded perspective view showing the nearby mechanisms, Figure 5 is a hydraulic piping diagram showing the control mechanism, Figure 6 is an explanatory diagram showing the width of the wheels and rolling pressure when the vehicle is moving straight, and Figure 7 is when the vehicle is being steered. FIG. 1... Vehicle body, 4... Front wheel mechanism, 5... Rear wheel mechanism,
6...Front wheel, 7.13...Fork, 8.14...
・Support shaft, 9.15... Lever, 10.16... Hydraulic cylinder, 11.17... Cylinder Rondo, 12...
·Rear wheel.

Claims (1)

[Claims] A vehicle body that can house and move an engine, a drive mechanism, etc., a front wheel mechanism that has a plurality of front wheels pivoted at the front of the vehicle body, and a rear wheel mechanism that is pivoted at the rear of the vehicle body and has a plurality of rear wheels. A tire roller that can independently steer the front wheel mechanism and rear wheel mechanism, and can change the direction of the vehicle body by steering the front wheel mechanism and rear wheel mechanism in opposite directions synchronously. .