JP6707501B2 - Rolling machine - Google Patents

Description

The present invention relates to a compaction machine used for compacting road surfaces such as tire rollers and vibration rollers.

Generally, when compacting a road surface by paving work or the like, a rolling machine such as a tire roller or a vibration roller is used. This compaction machine has a front compaction roller rotatably installed on the front side of the vehicle body and a rear compaction roller rotatably installed on the rear side, so that it can move forward at a low speed with respect to a road surface paved with paving material. By repeating traveling and backward traveling, the road surface is compacted by the compaction roller.

Here, when compacting the road surface with a compaction machine, the vehicle body should run at a constant speed so that there is no variation in the compaction density of the road surface. It is important to change the running speed smoothly.

On the other hand, there has been proposed a compaction machine equipped with a traveling speed setting switch for maintaining a constant traveling speed during compaction (see Patent Document 1). This compacting machine according to the prior art has a forward/reverse lever (speed adjusting member) that is switched from a stop position to a forward position or a reverse position, and from the stop position of the forward/reverse lever when the traveling speed setting switch is turned on. The displacement amount (operation position) is stored and the traveling speed corresponding to the displacement amount of the forward/reverse lever is maintained while the traveling speed setting switch is maintained in the ON state. This allows the compaction machine to run at a constant speed when performing compaction construction.

JP, 2011-74755, A

The compacting machine according to the above-mentioned conventional technique smoothly compacts the road surface by traveling at a constant speed when performing compaction construction only by forward traveling or when performing compaction construction only by backward traveling. be able to.

However, in normal compaction construction, the compaction machine compacts the road surface while repeating forward traveling and backward traveling, and even if the traveling speed during forward traveling or backward traveling is kept constant, forward traveling and backward traveling are performed. The compaction density of the road surface varies due to the speed change when switching the running. Therefore, during normal compaction construction, it is necessary to smoothly switch between forward traveling and backward traveling of the compaction machine. For this reason, the operator needs to delicately operate the forward/backward lever to switch the traveling direction to forward or reverse while the traveling speed of the compaction machine is sufficiently reduced.

When the forward traveling and the backward traveling are switched without sufficiently reducing the traveling speed of the compaction machine, the acceleration/deceleration traveling is rapidly performed, and the compaction density of the road surface varies, and the road surface is disturbed. On the other hand, if the compaction machine is decelerated for an unnecessarily long time at the time of switching between the forward traveling and the backward traveling, the compaction density variation can be suppressed, but the work efficiency of the compacting construction is reduced.

Therefore, it is very important to operate the forward/backward lever in order to smoothly switch the forward traveling and the backward traveling of the compaction machine, but the operation of the forward/backward lever depends on the operation technique of a skilled operator. is the current situation.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a compaction machine capable of smoothly switching between forward traveling and backward traveling during compaction construction.

In order to solve the above-mentioned problems, the present invention provides a vehicle body in which a front pressure roller or tire is rotatably provided on the front side and a rear pressure roller or tire is rotatably provided on the rear side, and A traveling motor mounted for traveling the vehicle body, a forward/backward lever operated by an operator to switch between a neutral position for stopping the vehicle body, a forward traveling position for moving the vehicle body forward, and a backward traveling position for moving the vehicle body backward; The present invention is applied to a compacting machine including a controller that controls the operation of a traveling motor.

A feature of the present invention is that a traveling speed setting switch that sets a rotation speed of the traveling motor to drive the vehicle body at a target traveling speed, and the vehicle body when the vehicle body is made to travel forward or backward by the forward/backward lever. And an acceleration/deceleration setting switch for setting an acceleration until reaching the target traveling speed and a deceleration until the vehicle body stops when the vehicle body is stopped from forward traveling or backward traveling by the forward/backward lever. When the forward/backward lever is switched between a forward traveling position and a reverse traveling position, the controller controls the rotation speed of the traveling motor set by the traveling speed setting switch and the acceleration/deceleration setting switch. The forward/backward lever has passed the neutral position when the forward/backward lever is switched between the forward traveling position and the backward traveling position by controlling the operation of the traveling motor based on the set acceleration or deceleration . Sometimes, the controller controls the operation of the traveling motor based on the deceleration set by the acceleration/deceleration setting switch until the vehicle body stops .

According to the present invention, the acceleration until the vehicle body reaches the target traveling speed and the deceleration until the vehicle body stops can be set by the acceleration/deceleration setting switch. Therefore, even when the traveling speed is reduced in order to switch between forward and backward movement of the vehicle body during compaction construction in which forward traveling and backward traveling are repeated, the vehicle body can be smoothly decelerated without relying on the operation technique of the operator. On the other hand, even when the decelerated vehicle body accelerates toward the target traveling speed, the vehicle body can be smoothly accelerated up to the target traveling speed without depending on the operation technique of the operator.

1 is a front view showing a tire roller according to a first embodiment of the present invention. FIG. 2 is an enlarged plan view of a control console, a handle and the like shown in FIG. FIG. 4 is a block diagram showing a connection state of an engine, a controller, a forward/backward lever, a traveling speed setting switch, an acceleration/deceleration setting switch, and the like, and a hydraulic system including a hydraulic pump and a traveling motor according to the first embodiment. 6 is a graph showing three types of acceleration/deceleration patterns set by an acceleration/deceleration setting switch. 6 is a graph showing a change in traveling speed of a tire roller according to an operation of a forward/reverse lever. 5 is a flowchart showing the contents of engine control processing executed by the controller according to the first embodiment. 7 is a flowchart following (1) in FIG. 6. 7 is a flowchart following (2) in FIG. 6. 7 is a flowchart following (3) in FIG. 6. It is the top view which looked at the control stand of a vibrating roller, a handle, etc. from 2nd Embodiment from above. FIG. 9 is a block diagram showing a hydraulic system including an engine, a controller, a forward/reverse lever, a traveling speed setting switch, an acceleration/deceleration setting switch, and the like, and a hydraulic pump and a traveling motor according to the second embodiment. 9 is a flowchart showing the contents of engine control processing executed by the controller according to the second embodiment.

Hereinafter, the case where the compaction machine according to the exemplary embodiment of the present invention is applied to a tire roller will be described as an example in detail with reference to the accompanying drawings. 1 to 9 show a first embodiment.

In the figure, a tire roller 1 as a compaction machine has a vehicle body 2 extending in the front and rear directions. The vehicle body 2 includes a frame 3 forming a strong support structure, an engine 4 mounted on the frame 3 as a power source for traveling the vehicle body 2, an on-board device such as the engine 4, a hydraulic pump 23 described later, a traveling motor 24, and the like. It is configured to include a front device cover 5A and a rear device cover 5B that are covered from the upper side. A front rolling roller 6 described below is provided on the front side of the vehicle body 2, and a rear rolling roller 8 described below is provided on the rear side of the vehicle body 2. By these front and rear rolling rollers 6, 8, It compacts by rolling the road surface and the ground covered with paving material.

The front rolling roller 6 is rotatably provided on the front side of the vehicle body 2. The front rolling roller 6 is composed of a plurality of (for example, three) rubber tires attached to one front axle (not shown) extending in the left and right directions. Here, on the front side of the frame 3 that constitutes the vehicle body 2, a roller support yoke 7 that turns left and right with respect to the frame 3 by operating a handle 14 described later is provided. Both end sides of the front axle 6 are rotatably supported by roller support yokes 7.

The rear pressure roller 8 is rotatably provided on the rear side of the vehicle body 2. The rear pressure roller 8 is composed of a plurality of (for example, four) rubber tires attached to two rear axles (not shown) extending in the left and right directions. Here, each rear axle of the rear pressure roller 8 is configured to be rotationally driven in a forward direction and a backward direction by a traveling motor 24, which will be described later, disposed on the rear side of the frame 3.

The floor plate 9 is provided at the front and rear central portions of the vehicle body 2. The floor plate 9 is arranged between the front device cover 5A and the rear device cover 5B, and forms a scaffold for a driver who drives the tire roller 1. A driver's seat 11, a control stand 13 and the like, which will be described later, are provided on the floor plate 9.

The boarding/alighting step 10 is provided on the left side surface of the vehicle body 2. The boarding/alighting step 10 is formed as a step-like step extending obliquely upward from the ground toward the floor board 9, and forms a scaffold for the operator to get on and off the road surface and the floor board 9.

The driver's seat 11 is arranged on the floor plate 9. An operator of the tire roller 1 is seated in the driver's seat 11, and an upper side of the driver's seat 11 is covered with a canopy 12. On the front side of the driver's seat 11, a control stand 13 for operating the tire roller 1 is erected. As shown in FIG. 2, a handle 14 for turning the roller support yoke 7 in the left and right directions to steer the front pressure roller 6, and a control unit 13 for controlling the number of revolutions of the engine 4 will be described later. A traveling speed setting switch 16, an acceleration/deceleration setting switch 17 and the like are provided.

The forward/backward lever 15 is provided between the control stand 13 and the handle 14 and is operated by an operator. As shown in FIG. 3, the forward-reverse lever 15 has a neutral position (N) for stopping the tire roller 1, a forward travel position (F) for forward travel, and a reverse travel position (R) for reverse travel. It is switched to the position and operated. Here, the neutral position (N) is arranged between the forward drive position (F) and the reverse drive position (R), and the forward/backward lever 15 is provided between the forward drive position (F) and the reverse drive position (R). The neutral position (N) is passed when the switching operation is performed between them. Then, the operator seated in the driver's seat 11 switches the forward/backward lever 15 to move the tire roller 1 forward or backward on the road surface to perform compaction construction on the road surface.

The traveling speed setting switch 16 is provided on the right side of the control stand 13 and is operated by the operator. The traveling speed setting switch 16 is a switch for setting the engine speed for causing the tire roller 1 to travel at the target traveling speed. Here, the traveling speed setting switch 16 is composed of, for example, a selectable switch that can be switched to four positions, and selectively sets a desired engine speed from four kinds of engine speeds 900 rpm, 1600 rpm, 1800 rpm, and 2200 rpm. It is configured to be able to. The engine speed set by the traveling speed setting switch 16 is input to the main controller 21 described later.

In addition, in the present embodiment, the case where the traveling speed setting switch 16 that selectively sets four types of engine rotation speeds is used is illustrated, but traveling in which three or less kinds or five or more kinds of engine rotation speeds can be set A speed setting switch may be used.

The acceleration/deceleration setting switch 17 is provided on the control console 13 adjacent to the right side of the traveling speed setting switch 16 and is operated by the operator. The acceleration/deceleration setting switch 17 is an acceleration until the tire roller 1 reaches a target traveling speed when the tire roller 1 is made to travel forward or backward by the forward/backward lever 15, and the tire roller 1 is stopped from traveling forward or backward. This is a switch for setting the deceleration until the tire roller 1 stops when the tire roller 1 is stopped. Here, the acceleration/deceleration setting switch 17 is composed of, for example, a selectable switch that can be switched to three positions, and has a configuration capable of selectively setting three types of predetermined acceleration/deceleration patterns.

In this case, the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17 includes an acceleration/deceleration pattern a having a relatively large acceleration/deceleration, an acceleration/deceleration pattern b having a relatively small acceleration/deceleration, as shown in FIG. There are three types of acceleration/deceleration patterns c, which are smaller than the acceleration/deceleration pattern a and larger than the acceleration/deceleration pattern b. The acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17 is input to the main controller 21.

In the present embodiment, the case where the acceleration/deceleration setting switch 17 that selectively sets three types of acceleration/deceleration patterns is used is illustrated, but an acceleration/deceleration pattern that can set two or less types or four or more types of acceleration/deceleration patterns. A speed setting switch may be used.

The brake device 18 is located on the right side of the control stand 13 and is provided on the floor plate 9. The brake device 18 has a brake pedal 18A that is operated by an operator seated in the driver's seat 11. By applying a braking force to the tire roller 1 by operating the brake pedal 18A, runaway of the tire roller 1 is suppressed. is there. The brake device 18 is connected to the main controller 21, and the operation amount for the brake pedal 18A is input to the main controller 21.

The accelerator device 19 is located on the right side of the brake device 18 and is provided on the floor plate 9. The accelerator device 19 has an accelerator pedal 19A operated by an operator seated in the driver's seat 11. When the accelerator pedal 19A is operated, the accelerator device 19 controls the rotation speed of the engine 4 according to the operation amount of the accelerator pedal 19A regardless of the settings of the traveling speed setting switch 16 and the acceleration/deceleration setting switch 17. is there. The accelerator device 19 is connected to the main controller 21, and the operation amount for the accelerator pedal 19A is input to the main controller 21.

The vehicle speed sensor 20 detects a rotation speed of a traveling motor 24 described later. The vehicle speed sensor 20 is connected to the main controller 21, and the rotation speed of the traveling motor 24 detected by the vehicle speed sensor 20 is input to the main controller 21.

Next, the main controller 21 and the engine controller 22 that control the operation of the traveling motor 24 will be described.

The main controller 21 and the engine controller 22 include a traveling motor, which will be described later, based on signals input from the forward/backward lever 15, the traveling speed setting switch 16, the acceleration/deceleration setting switch 17, the brake device 18, the accelerator device 19, the vehicle speed sensor 20, and the like. It controls the operation of 24. Here, the main controller 21 is configured as an arithmetic processing unit including, for example, a CPU (central processing unit), a storage device such as a ROM and a RAM, a timer for clocking, and other peripheral circuits. A forward/backward lever 15, a traveling speed setting switch 16, an acceleration/deceleration setting switch 17, a brake device 18, an accelerator device 19, and a vehicle speed sensor 20 are connected to the input side of the main controller 21. On the other hand, on the output side of the main controller 21, the engine controller 22 and electromagnetic pilot portions 29A and 29B of the switching valve 29 described later are connected.

When the acceleration/deceleration pattern is not set by the acceleration/deceleration setting switch 17, the main controller 21 receives input from the forward/reverse lever 15, the traveling speed setting switch 16, the brake device 18, the accelerator device 19, the vehicle speed sensor 20, and the like. The target rotation speed of the engine 4 is arithmetically processed based on the signal that is output to the engine controller 22. The engine controller 22 controls the rotation speed of the traveling motor 24 by controlling the operation of the engine 4 according to the target rotation speed of the engine 4 input from the main controller 21.

On the other hand, when the acceleration/deceleration pattern is set by the acceleration/deceleration setting switch 17, the main controller 21 rotates the engine 4 so that the traveling speed of the tire roller 1 changes to the target traveling speed according to the set acceleration/deceleration pattern. The number is arithmetically processed and output to the engine controller 22.

Next, a hydraulic system for running the tire roller 1 according to the present embodiment will be described. In FIG. 3, the hydraulic pump 23 and the traveling motor 24 composed of a hydraulic motor constitute a hydraulic closed circuit connected via a pair of main pipelines 25A and 25B. The hydraulic pump 23 is driven by the engine 4 to discharge pressure oil toward the travel motor 24, and the rotation speed of the travel motor 24 changes according to the rotation speed of the engine 4. The rotation of the traveling motor 24 is transmitted to the rear axle of the rear pressure roller 8 via a reduction mechanism (not shown), and the tire roller 1 travels. In this case, as the hydraulic pump 23, for example, a swash plate type, swash shaft type, radial piston type variable displacement hydraulic pump is used, and as the traveling motor 24, for example, a swash plate type, swash shaft type, radial piston type variable displacement hydraulic pump is used. Type hydraulic motor is used.

The hydraulic pump 23 has a tilting mechanism 23A such as a swash plate or a tilting shaft, and the tilting mechanism 23A is driven by a tilting actuator 26. That is, the tilting angle of the tilting mechanism 23A is based on the neutral position (the tilting angle is zero) and is set by the tilting actuator 26 to the forward side (direction of arrow A1 in FIG. 3) or the reverse side (in FIG. 3). It is switched to the direction of arrow B1). In this way, the tilting angle of the tilting mechanism 23A is changed by the tilting actuator 26, so that the direction of the pressure oil discharged from the hydraulic pump 23 to the pair of main pipes 25A, 25B is changed to the direction of arrow A2 in FIG. Direction or arrow B2 direction, the discharge capacity from the hydraulic pump 23 changes.

The charge pump 27 is driven by the engine 4 together with the hydraulic pump 23, and when the pressure in the pair of main pipes 25A and 25B is lower than the set pressure, the charge pump 27 is stored in the hydraulic oil tank 28 via a charge circuit (not shown). Is used to replenish the hydraulic oil in the main pipelines 25A and 25B. The charge pump 27 is connected to the tilt actuator 26 via a switching valve 29, which will be described later, and supplies the tilt actuator 26 with operating pressure oil.

The switching valve (ON/OFF valve) 29 is a 4-port 3-position solenoid valve having electromagnetic pilot portions 29A and 29B. The switching valve 29 is switched from the neutral position to the forward movement position (a) when a signal is supplied from the main controller 21 to the electromagnetic pilot portion 29A, and the tilting actuator 23 moves the tilting mechanism 23A toward the forward movement side (arrow A1 direction). Drive to. As a result, pressure oil is supplied from the hydraulic pump 23 to the traveling motor 24 in the direction of arrow A2, and the traveling motor 24 rotates, for example, in the forward direction. On the other hand, the switching valve 29 is switched from the neutral position to the reverse position (b) when a signal is supplied from the main controller 21 to the electromagnetic pilot unit 29B, and the tilt actuator 23 moves the tilt mechanism 23A to the reverse side (arrow B1). Direction). As a result, pressure oil is supplied from the hydraulic pump 23 to the traveling motor 24 in the direction of the arrow B2, and the traveling motor 24 is configured to rotate in the reverse direction, for example.

The tire roller 1 according to the present embodiment has the above-described configuration, and the operation of the tire roller 1 will be described below.

First, the operation of the tire roller 1 when the acceleration/deceleration during traveling is not set by the acceleration/deceleration setting switch 17 will be described.

In this case, the operator sits in the driver's seat 11 while the tire roller 1 is stopped. The operator switches the forward/reverse lever 15 from the neutral position (N) to the forward traveling position (F) or the reverse traveling position (R) while the acceleration/deceleration setting switch 17 is not operated (OFF), and then operates the accelerator pedal 19A. Operate the pedal.

The main controller 21 calculates the rotation speed of the engine 4 according to the operation amount of the accelerator pedal 19A, and the engine controller 22 controls the operation of the engine 4 according to the rotation speed calculated by the main controller 21. On the other hand, the main controller 21 outputs a control signal to the electromagnetic pilot portions 29A and 29B of the switching valve 29 based on the signal input from the forward/reverse lever 15, and the tilt actuator 23 causes the tilt mechanism 23A of the hydraulic pump 23 to operate. , The forward drive side (arrow A1 direction) or the reverse drive side (arrow B1 direction). As a result, the tire roller 1 travels forward or backward at the rotation speed of the engine 4 according to the operation amount of the accelerator pedal 19A, and can perform road compaction construction.

Next, the operation of the tire roller 1 when the acceleration/deceleration during traveling is set by the acceleration/deceleration setting switch 17 will be described with reference to FIG.

In this case, the operator seated in the driver's seat 11 inputs (ON) the acceleration/deceleration setting switch 17 and uses the acceleration/deceleration setting switch 17 to select three types of acceleration/deceleration patterns a and b shown in FIG. , C, for example, the acceleration/deceleration pattern a is set. Further, the operator operates the traveling speed setting switch 16 to selectively set the rotation speed of the engine 4 from four types of 900 rpm, 1600 rpm, 1800 rpm, and 2200 rpm. As a result, the target traveling speed of the tire roller 1 is set.

Next, the operator switches the forward/reverse lever 15 from the neutral position (N) to the forward traveling position (F) at time t1 in FIG. 5, for example. The main controller 21 calculates the rotation speed of the engine 4 based on the rotation speed according to the target travel speed set by the travel speed setting switch 16 and the acceleration/deceleration pattern a set by the acceleration/deceleration setting switch 17, The engine controller 22 controls the operation of the engine 4 according to the calculated rotation speed. As a result, the rotational speed of the engine 4 increases (accelerates) toward the rotational speed corresponding to the target traveling speed set by the traveling speed setting switch 16 according to the constant acceleration/deceleration pattern a set by the acceleration/deceleration setting switch 17. ) Will continue.

When the rotation speed of the engine 4 increases to the rotation speed corresponding to the target traveling speed, the tire roller 1 reaches the target traveling speed at time t2. In this state, until the time point t3 when the forward/reverse lever 15 is switched from the forward traveling position (F) to the reverse traveling position (R), the tire roller 1 continues the forward traveling while maintaining the target traveling speed. As described above, the tire roller 1 accelerates and runs according to the constant acceleration/deceleration pattern a during the period A from the time t1 to the time t3, and maintains the target traveling speed at a constant speed during the period B from the time t2 to the time t3. Drive at high speed.

Next, the operator switches the forward/reverse lever 15 from the forward drive position (F) to the reverse drive position (R) at time t3 in order to switch the tire roller 1 from the forward drive to the reverse drive. In this case, the tire roller 1 according to the present embodiment is not immediately switched from the forward traveling to the backward traveling by the switching operation of the forward/reverse lever 15, but is decelerated according to the set acceleration/deceleration pattern a and is temporarily stopped (traveling). After the speed becomes zero), it will start to move backward.

That is, when the forward/reverse lever 15 passes the neutral position (N) while the forward/reverse lever 15 is switched from the forward drive position (F) to the reverse drive position (R) at time t3, the main controller 21 causes the tire rollers to move. The engine speed of the engine 4 is set so that the target traveling speed of 1 becomes zero. Then, the main controller 21 calculates the rotation speed for the engine 4 to decelerate based on the acceleration/deceleration pattern a set by the acceleration/deceleration setting switch 17, and the engine controller 22 calculates the engine speed according to the calculated rotation speed. 4 controls the operation. As a result, the rotation speed of the engine 4 is reduced (decelerated) so that the traveling speed of the tire roller 1 becomes zero from the target traveling speed according to the constant acceleration/deceleration pattern a set by the acceleration/deceleration setting switch 17. ..

When the rotation speed of the engine 4 decreases to the rotation speed corresponding to the target traveling speed (zero), the tire roller 1 stops at the traveling speed of zero at time t4. In this way, the tire roller 1 shifts to deceleration traveling from the time point t3 when the forward/reverse lever 15 is switched to the reverse traveling position (R), and continues the deceleration traveling until the time point t4 when the traveling speed becomes zero. That is, in the period C from the time point t3 to the time point t4, the tire roller 1 decelerates according to the constant acceleration/deceleration pattern a.

At time t4 when the traveling speed of the tire roller 1 becomes zero, when the forward/reverse lever 15 holds the reverse traveling position (R), the tire roller 1 shifts from the temporarily stopped state to the backward traveling. .. At this time, the main controller 21 determines the rotation speed of the engine 4 based on the rotation speed according to the target travel speed set by the travel speed setting switch 16 and the acceleration/deceleration pattern a set by the acceleration/deceleration setting switch 17. Then, the engine controller 22 controls the operation of the engine 4 (travel motor 24) according to the calculated rotation speed. As a result, the rotational speed of the engine 4 increases (accelerates) toward the rotational speed corresponding to the target traveling speed set by the traveling speed setting switch 16 according to the constant acceleration/deceleration pattern a set by the acceleration/deceleration setting switch 17. ) Will continue.

When the number of revolutions of the engine 4 increases to the number of revolutions corresponding to the target traveling speed, the tire rollers 1 reach the target traveling speed at time t5, and then the forward/backward lever 15 is moved to the forward traveling position (F) or the neutral position (N). Until time t6 when the operation is switched to ), the tire roller 1 continues to travel backward while maintaining the target traveling speed. That is, the tire roller 1 accelerates and runs according to the constant acceleration/deceleration pattern a in the period D from the time t4 to the time t5, and maintains the target traveling speed and runs at a constant speed in the period E from the time t5 to the time t6. I do.

As described above, in the tire roller 1 according to the present embodiment, when the forward/reverse lever 15 is switched from the neutral position (N) to the forward traveling position (F), the traveling speed of the tire roller 1 (the rotation speed of the traveling motor 24). ) Increases (accelerates) toward the target traveling speed set by the traveling speed setting switch 16 in accordance with the acceleration/deceleration pattern a set by the acceleration/deceleration setting switch 17. Then, after reaching the target traveling speed, the tire roller 1 continues to travel forward while maintaining the target traveling speed until the forward/reverse lever 15 is switched.

On the other hand, when the forward/reverse lever 15 is switched from the forward traveling position (F) to the backward traveling position (R), the traveling speed of the tire roller 1 (the rotation speed of the traveling motor 24) is in the forward traveling according to the acceleration/deceleration pattern a. The target traveling speed is reduced (decelerated) to zero, and the tire roller 1 shifts from the temporarily stopped state to the backward traveling.

Also in this case, the traveling speed of the tire roller 1 increases (accelerates) toward the target traveling speed set by the traveling speed setting switch 16 according to the acceleration/deceleration pattern a set by the acceleration/deceleration setting switch 17. .. Then, after reaching the target traveling speed, the tire roller 1 continues the backward traveling while maintaining the target traveling speed until the forward/reverse lever 15 is switched.

Therefore, when the tire roller 1 repeats forward traveling and backward traveling to compact the road surface, the tire roller 1 uses the constant acceleration/deceleration pattern (for example, the acceleration/deceleration pattern a) set by the acceleration/deceleration setting switch 17. ) To the target traveling speed, and decelerates from the target traveling speed to zero according to a constant acceleration/deceleration pattern. As a result, when the traveling speed of the tire roller 1 changes between the target traveling speed and zero, the change in the traveling speed can always be kept constant (acceleration/deceleration pattern a).

As a result, as compared with the case where the operator operates the speed adjusting member to accelerate or decelerate the traveling speed, for example, variation in compaction density of the road surface due to unstable acceleration or deceleration traveling is suppressed, and the tire roller 1 The road surface can be compacted smoothly. Moreover, since the tire roller 1 according to the present embodiment does not require the operator to temporarily stop the tire roller 1 for an unnecessarily long time when switching between forward traveling and backward traveling, the work efficiency of compaction construction can be improved. You can

When the operator operates the brake pedal 18A of the brake device 18 at the time of compacting with the tire roller 1, the main controller 21 and the engine controller 22 set the traveling speed setting switch 16 and the acceleration/deceleration setting switch 17 to the setting. Regardless, the engine 4 is controlled so that the rotation speed of the engine 4 becomes the low idle rotation speed, and the tire roller 1 is decelerated or stopped. As a result, the tire roller 1 can be prevented from running away and the workability of compaction can be improved.

Further, when the operator operates the accelerator pedal 19A of the accelerator device 19 during the compaction construction with the tire roller 1, the main controller 21 and the engine controller 22 set the traveling speed setting switch 16 and the acceleration/deceleration setting switch 17 to the setting. Regardless, the rotation speed of the engine 4 is controlled according to the operation amount of the accelerator pedal 19A, and the traveling speed of the tire roller 1 is controlled by operating the accelerator pedal 19A. As a result, the tire roller 1 can be swiftly propelled toward the construction road surface on which compaction construction should be performed.

Next, the control process of the engine 4 executed by the main controller 21 when the tire roller 1 is compacted will be described with reference to FIGS. 6 to 9.

This control process starts, for example, when the engine 4 starts, and it is determined in step 1 whether or not the acceleration/deceleration setting switch 17 has been operated. If "NO" is determined in step 1, the process proceeds to step 24 shown in FIG. 9, and if "YES" is determined, the process proceeds to step 2. In step 2, it is determined whether or not the traveling speed setting switch 16 has been operated. If "NO" is determined in step 2, the process proceeds to step 24 in FIG. 9, and if "YES" is determined, the process proceeds to step 3.

In step 3, it is determined whether or not the accelerator pedal 19A has been operated. If "YES" is determined in step 3, the process proceeds to step 24 in FIG. 9, and if "NO" is determined, the process proceeds to step 4. In step 4, it is determined whether the brake pedal 18A has been operated. If "YES" is determined in step 4, the process proceeds to step 24 in FIG. 9, and if "NO" is determined, the process proceeds to step 5. In step 5, it is determined whether the forward/reverse lever 15 is in the neutral position (N). If "YES" is determined in step 5, the process proceeds to step 19 shown in FIG. 8, and if "NO" is determined, the process proceeds to step 6.

In step 6, it is determined whether the forward/reverse lever 15 is in the forward drive position (F). If "NO" is determined in step 6, the process proceeds to step 13 shown in FIG. 7, and if "YES" is determined, the process proceeds to step 7. In step 7, it is determined whether the switching valve 29 is in the forward drive position (a). If “YES” is determined in step 7, the process proceeds to step 8, the engine speed is set to the target engine speed according to the setting of the traveling speed setting switch 16, and then the process proceeds to step 9. In step 9, the engine speed is calculated according to the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17, and the process returns to step 1.

On the other hand, if "NO" is determined in step 7, that is, if the switching valve 29 is in the reverse position (b), the process proceeds to step 10 to determine whether the engine speed is the low idle speed or not. To judge. If "YES" is determined in step 10, the switching valve 29 is set to the forward movement position (a) in the following step 11, and then the process proceeds to step 8. When it is determined to be “NO” in step 10, the process proceeds to step 12, the target engine speed is set to the low idle speed, and then the process proceeds to step 9.

Thus, for example, when the forward/backward lever 15 holds the forward traveling position (F), the tire roller 1 travels while accelerating along the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17. The forward traveling is continued so that the engine speed set by the speed setting switch 16 is reached.

On the other hand, for example, when the forward/reverse lever 15 is switched to the forward traveling position (F) during the backward running of the tire roller 1, the tire roller 1 runs at a reduced speed according to the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17. At this time, when the engine speed has decreased to the low idle speed, the switching valve 29 is switched to the forward drive position (a), and the tire roller 1 shifts to the forward drive. When the engine speed has not decreased to the low idle speed, the vehicle is decelerated in accordance with the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17, and the backward traveling is continued to reach the low idle speed. To do.

Next, when it is determined to be "NO" in step 6, that is, when it is determined that the forward-reverse lever 15 is in the reverse traveling position (R), the process proceeds to step 13 shown in FIG. In step 13, it is determined whether the switching valve 29 is in the reverse position (b). If "YES" is determined in step 13, the process proceeds to step 14, the engine speed is set to the target engine speed according to the setting of the traveling speed setting switch 16, and then the process proceeds to step 15. In step 15, the engine speed is calculated according to the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17, and the process returns to step 1.

On the other hand, when it is determined to be "NO" in step 13, that is, when it is determined that the switching valve 29 is in the forward drive position (a), the process proceeds to step 16 and whether the engine speed is the low idle speed or not. To judge. If "YES" is determined in step 16, the switching valve 29 is set to the reverse position (b) in the following step 17, and then the process proceeds to step 14. Further, when it is determined to be "NO" in step 16, the process proceeds to step 18, the target engine speed is set to the low idle speed, and then the process proceeds to step 15.

Thus, for example, when the forward/reverse lever 15 holds the reverse travel position (R), the tire roller 1 travels while accelerating along the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17. The backward traveling is continued so that the engine speed set by the speed setting switch 16 is reached.

On the other hand, for example, when the forward/backward lever 15 is switched to the reverse traveling position (R) during forward traveling of the tire roller 1, the tire roller 1 decelerates and travels according to the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17. At this time, when the engine speed has decreased to the low idle speed, the switching valve 29 is switched to the reverse position (b), whereby the tire roller 1 shifts to the reverse running. Further, when the engine speed has not decreased to the low idle speed, the vehicle continues to travel forward so that the low idle speed is reached while decelerating along the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17. To do.

Therefore, after the forward/reverse lever 15 is switched to the reverse traveling position (R) when the tire roller 1 travels forward, the forward/reverse lever 15 is switched to the forward traveling position (F) again before the low idle speed is reached. In this case, the tire roller 1 continues to move forward. Similarly, when the tire roller 1 travels backward, the forward/reverse lever 15 is switched to the forward travel position (F), and before the low idle speed is reached, the forward/reverse lever 15 is switched to the reverse travel position (R) again. If the tire roller 1 is turned on, the tire roller 1 continues to travel backward.

Next, if "YES" is determined in step 5, that is, if the forward/reverse lever 15 is determined to be in the neutral position (N), the process proceeds to step 19 shown in FIG. In step 19, it is determined whether the engine speed is low idle speed. When it is determined to be “NO” in step 19, the target engine speed is set to the low idle speed in subsequent step 20, and then the process proceeds to step 21. In step 21, the engine speed is calculated according to the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17, and the process returns to step 1.

On the other hand, if "YES" is determined in step 19, the switching valve 29 is set to the neutral position in the following step 22, and then the process returns to step 1 while maintaining the low idle rotation speed in step 23.

Thus, for example, when the forward/reverse lever 15 is in the neutral position (N) and the engine speed does not decrease to the low idle speed, the acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17 is set. While decelerating along, the vehicle continues traveling forward or backward so as to achieve a low idle speed. On the other hand, when the engine speed drops to the low idle speed, the forward/reverse lever 15 is operated to the forward drive position (F) or the reverse drive position (R) while maintaining the low idle speed. Wait for

Next, when it is determined to be "NO" in step 1 or step 2 and when it is determined to be "YES" in step 3 or step 4, the process proceeds to step 24 shown in FIG. In step 24, it is determined whether or not the forward/reverse lever 15 is in the neutral position (N), and if "YES" is determined, the process proceeds to step 25. After the switching valve 29 is set to the neutral position in step 25, the engine speed according to the operation of the accelerator pedal 19A is calculated in step 26, and the process returns to step 1.

On the other hand, if "NO" is determined in step 24, the process proceeds to step 27, and it is determined whether or not the forward/reverse lever 15 is in the reverse position (R). If "YES" is determined in step 27, the process proceeds to step 28, the switching valve 29 is set to the reverse position (R), and then the process proceeds to step 26. If "NO" is determined in step 27, the process proceeds to step 29, the switching valve 29 is set to the forward position (F), and then the process proceeds to step 26.

As described above, when the accelerator pedal 19A is operated, the engine speed is calculated according to the operation of the accelerator pedal 19A regardless of the setting of the acceleration/deceleration setting switch 17 and the setting of the traveling speed setting switch 16, and the tire The roller 1 accelerates or decelerates according to the operation of the accelerator pedal 19A. On the other hand, when the brake pedal 18A is operated without operating the accelerator pedal 19A, the operation amount (zero) of the accelerator pedal 19A regardless of the setting of the acceleration/deceleration setting switch 17 and the traveling speed setting switch 16. The engine speed is calculated in accordance with the above, and the tire roller 1 decelerates according to the operation of the brake pedal 18A.

The control process of the main controller 21 described above is repeatedly executed until the operation of the engine 4 is completed.

As described above, in the first embodiment, when the forward/reverse movement of the tire roller 1 is switched, the target traveling speed of the tire roller 1 becomes zero when the forward/reverse lever 15 passes through the neutral position (N). The rotation speed of the engine 4 is controlled, and the tire roller 1 decelerates according to the acceleration/deceleration pattern a set by the acceleration/deceleration setting switch 17 and stops. On the other hand, when the forward/reverse lever 15 is held in the forward traveling position (F) or the reverse traveling position (R), the rotation speed of the engine 4 is controlled so that the tire roller 1 maintains the target traveling speed, and the tire roller is rotated. 1 continues forward traveling or backward traveling while maintaining the target traveling speed set by the traveling speed setting switch 16.

Thus, the tire roller 1 according to the first embodiment includes the traveling speed setting switch 16 for setting the rotation speed of the engine 4 in order to drive the tire roller 1 at the target traveling speed, and the tire roller 1 traveling forward or backward. An acceleration/deceleration setting switch 17 for setting an acceleration until the tire roller 1 reaches the target traveling speed when the tire roller 1 is driven, and a deceleration until the tire roller 1 is stopped when the tire roller 1 is stopped from the forward traveling or the backward traveling. The main controller 21 and the engine controller 22 are set by the traveling speed setting switch 16 when the forward/reverse lever 15 is switched between the forward traveling position (F) and the reverse traveling position (R). The operation of the engine 4 (travel motor 24) is controlled based on the engine speed and the acceleration or deceleration set by the acceleration/deceleration setting switch 17.

Thereby, even when the traveling speed is reduced in order to switch forward and backward movement of the tire roller 1 during the compaction construction in which the forward traveling and the backward traveling are repeated, the acceleration/deceleration setting switch 17 is set without depending on the operation technique of the operator. The tire roller 1 can be smoothly decelerated according to the deceleration. On the other hand, even when the decelerated tire roller 1 accelerates toward the target traveling speed, the tire roller 1 can be smoothly accelerated up to the target traveling speed without depending on the operation technique of the operator. As a result, for example, as compared with the case where the operator operates the speed adjusting member to accelerate or decelerate the traveling speed, variation in compaction density of the road surface due to unstable acceleration traveling or deceleration traveling is suppressed, and the tire roller 1 The road surface can be compacted smoothly.

When the forward/reverse lever 15 passes through the neutral position (N) when the forward/reverse lever 15 is switched between the forward drive position (F) and the reverse drive position (R), the main controller 21 and the engine controller Reference numeral 22 controls the operation of the engine 4 (travel motor 24) based on the deceleration set by the acceleration/deceleration setting switch 17 until the tire roller 1 stops. As a result, when the tire roller 1 is switched from forward traveling to reverse traveling, or when it is switched from backward traveling to forward traveling, the tire roller 1 is decelerated according to the deceleration set by the acceleration/deceleration setting switch 17, and smoothly. You can stop.

Further, the tire roller 1 is provided with an accelerator device 19 operated by an operator, and when the accelerator device 19 is operated, the main controller 21 and the engine controller 22 cause the running speed setting switch 16 and the acceleration/deceleration setting switch 17 to operate. Regardless of the setting, the operation of the engine 4 is controlled according to the operation of the accelerator device 19 (accelerator pedal 19A). As a result, for example, when the tire roller 1 is self-propelled toward the road surface to be compacted, the tire roller 1 can be moved quickly.

Further, the tire roller 1 is provided with a brake device 18 operated by an operator, and when the brake device 18 is operated, the main controller 21 and the engine controller 22 cause the running speed setting switch 16 and the acceleration/deceleration setting switch 17 to operate. Regardless of the setting, the operation of the engine 4 is controlled according to the operation of the brake device 18 (brake pedal 18A). As a result, the tire roller 1 can be decelerated or stopped according to the operation on the brake device 18, so that the tire roller 1 can be prevented from running away and the workability of compaction construction can be improved.

Further, the acceleration/deceleration setting switch 17 is configured by a selective switch that selects any one of a plurality of predetermined types of acceleration/deceleration patterns. This makes it possible to select an acceleration/deceleration pattern suitable for the state of the road surface on which compaction is to be performed, and to accelerate or decelerate the tire roller 1 according to this acceleration/deceleration pattern, so that the road surface can be smoothly compacted, and The work efficiency of compaction construction can be improved.

Next, FIGS. 10 to 12 show a second embodiment of the present invention, and the feature of the second embodiment resides in that the operation of the traveling motor is controlled by the discharge capacity of the hydraulic pump. In addition, in the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the second embodiment, a vibrating roller is used as the rolling machine, and the vibrating roller is provided with a mechanism for imparting vibration to the roller, for example, and vibrates the roller to compact the road surface. Here, on the control base 31 of the vibration roller shown in FIG. 10, the handle 14, the traveling speed setting switch 16, the acceleration/deceleration setting switch 17, the forward and backward levers 32 arranged on the left and right with the handle 14 sandwiched, and the right side An accelerator lever 33 and the like arranged on the front side of the forward-reverse lever 32 are provided.

The forward/backward lever 32 is operated to be switched to three positions of a neutral position (N) for stopping the vibration roller, a forward traveling position (F) for traveling forward, and a reverse traveling position (R) for traveling backward, The switching speed of the proportional valve 34, which will be described later, changes according to the operating speed of the forward/backward lever 32.

The accelerator lever 33 switches, for example, the engine rotation speed between high rotation and low rotation, and is operated to the high rotation side in order to increase the rotation speed of the engine 4 when the vibrating roller is run. Therefore, the accelerator lever 33 is not operated while the vibrating roller is running. Instead of the accelerator lever 33, a switch for switching the rotation speed of the engine 4 between high rotation and low rotation may be used.

Next, a hydraulic system for running the vibrating roller according to the second embodiment will be described. In FIG. 11, the hydraulic pump 23 and the traveling motor 24 composed of a hydraulic motor constitute a hydraulic closed circuit connected via a pair of main pipes 25A and 25B. The hydraulic pump 23 has a tilting mechanism 23A, and this tilting mechanism 23A is driven by a tilting actuator 26. That is, the tilting angle of the tilting mechanism 23A is based on the neutral position (the tilting angle is zero) and is set by the tilting actuator 26 to the forward side (direction A1 in FIG. 11) or the backward side (in FIG. 11). It is switched to the direction of arrow B1). In this way, the tilting angle of the tilting mechanism 23A is changed by the tilting actuator 26, so that the direction of the pressure oil discharged from the hydraulic pump 23 to the pair of main pipes 25A, 25B is indicated by an arrow A2 in FIG. Direction or arrow B2 direction, the discharge capacity from the hydraulic pump 23 changes.

The charge pump 27 is driven by the engine 4 together with the hydraulic pump 23, and when the pressure in the pair of main pipes 25A, 25B is lower than the set pressure, the charge pump 27 is stored in the hydraulic oil tank 28 via a charge circuit (not shown). Is used to replenish the hydraulic oil in the main pipelines 25A and 25B. The charge pump 27 is connected to the tilt actuator 26 via a proportional valve 34, which will be described later, and supplies pressure oil for operation to the tilt actuator 26.

The proportional valve 34 is a 4-port 3-position electromagnetic proportional valve having electromagnetic pilot portions 34A and 34B. When a signal is supplied from the main controller 21 to the electromagnetic pilot portion 34A, the proportional valve 34 switches from the neutral position to the forward position (a) with a control speed and control range (valve opening) according to the current value of this signal. Then, the tilt actuator 23 drives the tilt mechanism 23A toward the forward side (direction of arrow A1). As a result, pressure oil is supplied from the hydraulic pump 23 to the traveling motor 24 in the direction of arrow A2, and the traveling motor 24 rotates, for example, in the forward direction. In this case, the control speed when the proportional valve 34 is switched from the neutral position to the forward position (a) changes according to the setting of the acceleration/deceleration setting switch 17, and the proportional valve 34 changes from the neutral position to the forward position (a). The control range when switching is changed according to the setting of the traveling speed setting switch 16.

On the other hand, when a signal is supplied from the main controller 21 to the electromagnetic pilot section 34B, the proportional valve 34 has a control speed and a control range (valve opening) according to the current value of this signal from the neutral position to the reverse position (b). Then, the tilting actuator 23 drives the tilting mechanism 23A to the reverse side (direction of arrow B1) by the tilting actuator 26. As a result, pressure oil is supplied from the hydraulic pump 23 toward the traveling motor 24 in the direction of the arrow B2, and the traveling motor 24 rotates, for example, in the reverse direction. In this case, the control speed when the proportional valve 34 is switched from the neutral position to the reverse position (b) changes according to the setting of the acceleration/deceleration setting switch 17, and the proportional valve 34 changes from the neutral position to the reverse position (b). The control range when switching is changed according to the setting of the traveling speed setting switch 16. In this way, the operation (rotation speed) of the travel motor 24 is controlled by appropriately setting the discharge capacity of the hydraulic pump 23 when the travel motor 24 rotates in the forward direction or the reverse direction. There is. The proportional valve 34 is configured so that when the operator operates the forward/backward lever 32, the control speed at the time of switching from the neutral position to the forward drive position (a) or the reverse drive position (b) changes according to the operating speed. Has become.

The vibrating roller according to the second embodiment has the configuration as described above, and the control process executed by the main controller 21 at the time of compaction construction by the vibrating roller will be described with reference to FIG.

First, in step 31, it is determined whether or not the brake pedal 18A has been operated. If "YES" is determined in the step 31, the process proceeds to a step 32, the output of the signal to the electromagnetic pilot portions 34A and 34B of the proportional valve 34 is stopped, the proportional valve 34 is set to the neutral position, and the step 31 Return to.

When it is determined to be “NO” in step 31, it is determined in step 33 whether or not the accelerator lever 33 is operated. If "NO" is determined in step 33, the process proceeds to step 38 described below, and if "YES" is determined, the process proceeds to step 34. In step 34, it is determined whether or not the acceleration/deceleration setting switch 17 has been operated. If "NO" is determined in step 34, the process proceeds to step 36 described later, and if "YES" is determined, the process proceeds to step 35.

In step 35, the control speed of the proportional valve 34, that is, the speed at which the proportional valve 34 switches from the neutral position to the forward drive position (a) or the reverse drive position (b) is set in accordance with the setting of the acceleration/deceleration setting switch 17. In the following step 36, it is determined whether or not the traveling speed setting switch 16 has been operated. When it is determined to be "NO" in step 36, the process proceeds to step 38, and when it is determined to be "YES", the process proceeds to step 37.

In step 37, the control range of the proportional valve 34 according to the setting of the traveling speed setting switch 16, that is, the control range when the proportional valve 34 is switched from the neutral position to the forward position (a) or the reverse position (b) (valve open). Degree). In the following step 38, in order to adjust the control speed of the proportional valve 34 according to the speed (operating speed) when the forward/reverse lever 32 is operated, the target proportional valve output value supplied to the proportional valve 34 (output to the proportional valve 34). Signal output value).

In the following step 39, the target proportional valve output value corresponding to the control speed of the proportional valve 34 corresponding to the operation speed of the forward/backward lever 32 and the control speed of the proportional valve 34 corresponding to the setting of the acceleration/deceleration setting switch 17 are corresponded. The proportional valve output value is compared to determine whether the two are the same value. If "YES" is determined in step 39, the process proceeds to step 40, the proportional valve output value according to the setting of the acceleration/deceleration setting switch 17 is maintained, and the process returns to step 31.

If "NO" is determined in step 39, the process proceeds to step 41, and it is determined whether or not the control speed of the proportional valve 34 is set. If "YES" is determined in step 41, the process proceeds to step 43, and the output value of the signal supplied to the proportional valve 34 (the proportional valve is set in accordance with the control speed of the proportional valve 34 set by the acceleration/deceleration setting switch 17). Output value) is calculated.

On the other hand, if "NO" is determined in the step 41, the process proceeds to a step 42 to set the control speed of the proportional valve 34 according to the operation speed of the forward/backward lever 32. Then, in the following step 43, the output value (proportional valve output value) of the signal supplied to the proportional valve 34 is calculated according to the control speed of the proportional valve 34 according to the operation speed of the forward/backward lever 32, and the process returns to step 31. ..

In this way, the control speed when the proportional valve 34 is switched from the neutral position to the forward position (a) or the reverse position (b) is set according to the setting of the acceleration/deceleration setting switch 17, and the discharge capacity of the hydraulic pump 23 is set. By being controlled, the rotation speed of the traveling motor 24 can be controlled. Accordingly, also in the vibrating roller according to the second embodiment, the target traveling speed is accelerated according to the constant acceleration/deceleration pattern set by the acceleration/deceleration setting switch 17, and the target traveling speed is reduced to zero according to the constant acceleration/deceleration pattern. Slow down. As a result, the change in the traveling speed of the vibrating roller can be kept constant, and the road surface can be smoothly compacted by the vibrating roller.

In the embodiment, as the rolling machine, the tire roller 1 in which the front rolling roller 6 and the rear rolling roller 8 are each composed of a plurality of rubber tires is illustrated. However, the present invention is not limited to this, and for example, the front and rear compaction rollers are made of iron wheels, respectively, and one of the front and rear compaction rollers is made of an iron wheel, and the other is made of a rubber tire. The present invention can also be applied to other compacting machines such as a small roller and a vibrating roller in which a compacting roller vibrates.

1 Tire roller (rolling machine)
2 vehicle body 4 engine 6 front rolling roller 8 rear rolling roller 15 forward/backward lever 16 traveling speed setting switch 17 acceleration/deceleration setting switch 18 braking device 19 accelerator device 21 main controller 22 engine controller 23 hydraulic pump 24 traveling motor

Claims (6)

A vehicle body in which a front pressure roller or tire is rotatably provided on the front side and a rear pressure roller or tire is rotatably provided on the rear side,
A traveling motor mounted on the vehicle body for traveling the vehicle body;
A forward-reverse lever that is operated by an operator to switch between a neutral position for stopping the vehicle body, a forward traveling position for moving the vehicle body forward, and a backward traveling position for moving the vehicle body backward;
In a compaction machine comprising a controller for controlling the operation of the traveling motor,
A traveling speed setting switch for setting the number of revolutions of the traveling motor for traveling the vehicle body at a target traveling speed;
Acceleration until the vehicle body reaches the target traveling speed when the vehicle body travels forward or backward by the forward-backward lever, and the vehicle body when the vehicle body is stopped from forward or backward traveling by the forward-backward lever. Is provided with an acceleration/deceleration setting switch for setting the deceleration until the
The controller sets the rotational speed of the traveling motor set by the traveling speed setting switch and the acceleration/deceleration setting switch when the forward/backward lever is switched between a forward traveling position and a reverse traveling position. Controlling the operation of the traveling motor based on the acceleration or deceleration ,
When the forward/reverse lever passes through the neutral position when the forward/reverse lever is switched between the forward traveling position and the reverse traveling position, the controller sets the acceleration/deceleration setting switch until the vehicle body stops. A rolling machine according to claim 1, wherein the operation of the traveling motor is controlled based on the deceleration . 2. The compacting machine according to claim 1, wherein an engine serving as a power source of the traveling motor is mounted on the vehicle body, and the controller controls the operation of the traveling motor at an engine speed. An engine serving as a power source of the traveling motor and a hydraulic pump for driving the traveling motor are mounted on the vehicle body, and the controller controls the operation of the traveling motor by the discharge capacity of the hydraulic pump. The rolling machine according to claim 1, which is characterized in that. The vehicle body is provided with an accelerator device operated by an operator,
When an operation is performed on the accelerator device, the controller controls the operation of the traveling motor according to the operation of the accelerator device regardless of the settings of the traveling speed setting switch and the acceleration/deceleration setting switch. The rolling machine according to claim 1, 2 or 3. The vehicle body is provided with a brake device operated by an operator,
When the brake device is operated, the controller controls the operation of the traveling motor according to the operation of the brake device regardless of the settings of the travel speed setting switch and the acceleration/deceleration setting switch. The rolling machine according to claim 1, 2 or 3. 4. The acceleration/deceleration setting switch is configured by a selective switch for selecting one acceleration/deceleration pattern from a plurality of predetermined types of acceleration/deceleration patterns. Rolling machine.

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