JP4318706B2 - Vibration control device for vibrating roller - Google Patents

Description

  The present invention relates to a vibration control device for a vibration roller used in asphalt pavement work or the like.

  The vibrating roller is used for embankment compaction work such as roads and dam construction, asphalt pavement work for roads, and the like, and has been generally well known (see, for example, Patent Document 1).

  When the operator tilts the travel lever, the vibration roller known from Patent Document 1 and the like controls the start and stop of the vibration roller main body in the forward / backward direction according to the operation of the travel lever, and starts and stops the vibration generator. A traveling and vibration control device for controlling the above is provided.

  FIG. 8 shows a hydraulic circuit in a conventional vibrating roller. The traveling hydraulic circuit is a control comprising a variable discharge amount traveling hydraulic pump 31 driven by an engine 30, a switching valve 38, a servo valve 39, and the like. The valve 33, the traveling hydraulic motor 4 of the rear wheel motor drive circuit 34, the traveling hydraulic motor 6 of the front wheel motor drive circuit 35, and the like are configured. The swash plate tilt is changed to control the discharge amount, and the traveling closed circuit HST (Hydro Static Transmission) is configured in which the rotational direction and speed of the traveling hydraulic motors 4 and 6 are controlled.

  On the other hand, the vibration roller drive circuit 36 includes a vibration hydraulic pump 32 driven by the engine 30, a vibration hydraulic motor 8 of the vibration generator 9 driven by the discharge oil of the vibration hydraulic pump 32, A solenoid valve 37 for controlling the amount of pressure oil supplied to the vibration hydraulic motor 8 is provided.

  As shown in FIGS. 9 to 10, the control stand 10 is provided with a steering handle 11, a travel lever 12, a vibration mode switch 13 and the like. The travel lever 12 is formed to be capable of rotating (tilting) in the front-rear direction around the base shaft 14, and can be switched to each of the forward position F, the neutral position N, and the reverse position R. An operating arm 15 is fixed in the vicinity of the base shaft 14, and the operating arm 15 rotates integrally with the traveling lever 12. One end of the control cable 16 is secured to the operating arm 15, and the other end of the control cable 16 is secured to the rear end portion of the swing plate 51 of the travel and vibration control device 50.

  The swing plate 51 is formed so as to be swingable in the horizontal direction integrally with the pivot 19 with the pivot 19 that controls the control valve 33 for the traveling motor as a fulcrum. On the front end side of the swing plate 51, two long holes 56A and 56B are formed on a line (reference line S) connecting the pivot 19 and the neutral position N.

  Further, limit switches 26A and 26B are provided above the swing plate 51. One limit switch 26A is installed above the elongated hole 56A via a fixed bracket 27A, and vibration of the vibration generator starts. It is for stopping and linked to the solenoid valve of the vibration generator. The other limit stitch 26B is installed above the elongated hole 56B via a fixed bracket 27B, enables the engine to be started for neutral position detection, and interlocks with a warning buzzer forgetting to release the parking brake when the vehicle starts running. . The respective limit switches 26A and 26B are arranged corresponding to the trajectories through which the long holes 56A and 56B pass when the swing plate 51 swings. In FIG. 9, the limit switches 26A and 26B are not shown in order to make the structure of the swing plate 51 easier to see.

  Each limit switch 26A, 26B is urged in a direction in which the actuators 26Aa, 26Ba always protrude by a spring (not shown), and rollers 26Ab, 26Bb are rotatably attached to the tip portions of the actuators 26Aa, 26Ba. It has been.

  In addition, when the swing plate 51 is disposed at the neutral position N, the limit switches 26A and 26B are configured so that the rollers 26Ab and 26Bb correspond to the long holes 56A and 56B of the swing plate 51 as shown in FIG. It is set so that the contact portion is turned off.

  When the swing plate 51 swings to the forward position F or the reverse position R, the rollers 26Ab and 26Bb of the respective limit switches 26A and 26B are pushed out from the inside of the long holes 56A and 56B and placed on the swing plate 51. It rides and rolls, and the actuators 26Aa and 26Ba are pushed back to the inside of the limit switches 26A and 26B against the biasing force of the springs. Thereby, the contact part of each limit switch 26A, 26B switches from OFF to ON.

  On the other hand, when the swinging plate 51 is returned from the forward position F or the reverse position R to the neutral position N, the rollers 26Ab and 26Bb of the respective limit switches 26A and 26B fall again into the long holes 56A and 56B, respectively. The contact portions of 26A and 26B are set so as to switch from on to off again.

  When the traveling lever 12 is rotated in the front-rear direction, the operating arm 15 rotates integrally to push and pull the control cable 16, and the swing plate 51 swings horizontally around the pivot 19 as a pivot. The front end portion is switched to the forward position F, the neutral position N, and the reverse position R shown in FIG. Further, the pivot 19 rotates integrally with the swing plate 51 in either the left or right direction, the control valve 33 for the traveling motor is controlled, and the inclination of the swash plate of the traveling hydraulic pump 31 is changed to control the discharge amount. Is done.

  Therefore, supply or stop is performed to the traveling hydraulic motor 4 of the rear wheel motor drive circuit 34 and the traveling hydraulic motor 6 of the front wheel motor drive circuit 35 with a discharge amount in which the pressure oil is controlled from the traveling hydraulic pump 31. Thus, the start and stop movements of the vibration roller body 3 are controlled.

  When the swing plate 51 swings to the forward position F or the reverse position R, as described above, the limit switches 26A and 26B are switched from OFF to ON, and the solenoid valve of the vibration roller drive circuit 36 is switched by the limit switch 26A. 37 is opened and the vibration hydraulic motor 8 is rotated to start vibration of the vibration generator, and a warning buzzer (not shown) is activated when the limit switch 26B forgets to release the parking brake when the vehicle starts to run. .

  As described above, the conventional travel and vibration control device 50 includes the hydraulic devices shown in the hydraulic circuit of FIG. 8, the swing plate 51 shown in FIGS. 9 to 10, and the long holes provided in the swing plate 51. 56A, 56B, and limit switches 26A, 26B that turn on and off when the rollers 26Ab, 26Bb are disengaged from the long holes 56A, 56B.

The travel and vibration control device 50 controls the start and stop of the vibration roller body according to the swing position of the swing plate 51, that is, the pivot position of the pivot 19, and is provided on the swing plate 51. When the rollers 26Ab and 26Bb of the limit switches 26A and 26B are engaged with and disengaged from the long holes 56A and 56B which are the recesses, the start and stop of the vibration generator are controlled, and the neutral position or the brake release is forgotten. It is possible to determine whether it exists.
JP-A-7-207617.

  As described above, the traveling and vibration control device 50 in the conventional vibration roller rotates the traveling lever 12 and starts and stops the forward and backward movement of the vibration roller body in conjunction with the rotation operation. Starts and stops. However, the start and stop of the vibration roller main body, the start and stop of the vibration roller, and the start and stop timing of the vibration generator greatly affect the finish of the pavement surface. . That is, if the vibration generator is started or stopped too early or too late when the vibration roller starts or stops, the construction surface becomes rough or roller marks or the like are generated.

  In addition, this timing may need to be adjusted depending on the skill level of the operator. This timing adjustment may be performed by adjusting the on / off timing of one of the limit switches 26A described above. Conventionally, both of the limit switches 26A and 26B have the long holes 56A provided on the swing plate 51, Since the positions of the long holes 56A and 56B with respect to the swing plate 51 cannot be easily adjusted because they are turned on and off by the engagement / disengagement operation to / from 56B, therefore, the vibration roller body starts and stops moving forward and backward, and starts and stops. It is difficult to adjust the timing of starting and stopping the vibration device, and there is a disadvantage that the operator must continue using the device with a sense of incongruity.

  Therefore, there are technical problems that need to be solved in order to enable the user to easily adjust the start and stop movements of the vibration roller body and the start and stop timing of the vibration generator. The present invention aims to solve this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is a swinging plate that can swing integrally with the pivot on the pivot that controls the control valve for traveling. The swing plate is swingable in accordance with the direction of operation of the travel lever, and a limit switch is disposed in the vicinity of the recess provided in the swing plate, and the swing plate is swung. The pivot rotates to control the start and stop of the vibration roller body, and the limit switch actuator engages and disengages the recess to control the start and stop of the vibration generator. In the vibration roller travel and vibration control device configured to be configured, a striker is juxtaposed on the swing plate so that the position of the striker can be adjusted in the swing direction, and a recess formed by the striker is disposed on the swing plate. The position can be adjusted with respect to the swing direction. To provide a vibration control device for a vibration roller, characterized in that the sea urchin configuration.

  According to this configuration, the position of the striker provided on the swing plate is adjusted, and the position of the recess formed by the striker is adjusted with respect to the swing direction of the swing plate, so that the limit switch is recessed. The timing for disengaging and turning on / off is changed. Therefore, the on / off timing of the limit switch can be changed with respect to the pivot of the pivot that controls the traveling control valve. That is, the start and stop of the vibration roller main body is controlled in conjunction with the turning operation of the traveling lever, and the start and stop timings of the vibration generator for the start and stop movements are determined by the operator's operational feeling. Can be adjusted to fit.

  According to the first aspect of the present invention, since the position of the recess of the swing plate can be arbitrarily adjusted by adjusting the position of the striker, activation of the vibration generating device with respect to the forward and backward movement of the vibration roller body The stop timing can be easily adjusted at the site or the like so as to match the operation feeling of the operator. Further, the cost can be reduced by simplifying the structure. Thus, the operability of the operator is improved, and the finish of the construction can be improved by preventing the pavement surface from being attached with a roller mark or the like.

  In order to achieve the purpose of allowing the user to easily adjust the start and stop movements of the vibration roller body and the start and stop timing of the vibration generator, the control valve for driving is controlled. A swing plate that can swing integrally with the pivot with a pivot as a fulcrum. The swing plate is swingable according to the operating direction of the travel lever, and is provided in the recess provided on the swing plate. A limit switch is arranged close to the location, and the pivot is rotated by the swing of the swing plate to control the start and stop of the vibration roller body forward and backward, and the limit switch engages the recess. In the traveling and vibration control device of the vibration roller configured to be turned on and off and to control the start and stop of the vibration generator, the swing plate is provided with a striker in the swing direction so that the position of the striker can be adjusted. By The formed recess, and implemented by configuring to allow positional adjustment with respect to the oscillation direction of the oscillating plate.

  A vibration roller vibration control apparatus according to the present invention will be described below with reference to FIGS. For convenience of explanation, the same components as those described in the conventional example are denoted by the same reference numerals, and redundant description is omitted.

  The vibration roller 1 has a vibration roller body 3 having a driver seat 2 provided on the upper portion. Rear wheel tires 5, 5 driven by traveling hydraulic motors 4, 4 are provided on the left and right sides of the rear side of the vibration roller body 3. On the other hand, a roller 7 as a front wheel driven by the traveling hydraulic motor 6 is provided on the front side. In addition to the traveling hydraulic motor 6, a vibration hydraulic motor is provided inside the roller 7 in order to apply vibration to the roller 7 and increase the compaction effect of the road bed, roadbed, asphalt mixture, and the like. An exciter 9 driven by 8 is provided.

  A control stand 10 is provided in front of the driver's seat 2, and a steering handle 11, a traveling lever 12, a vibration mode changeover switch 13, and the like are provided. The travel lever 12 is formed to be rotatable in the front-rear direction, and can be switched to each of the forward position F, the neutral position N, and the reverse position R. The turning operation of the travel lever 12 is transmitted to the swing plate 18 via the control cable 16, and the swing plate 18 swings in the horizontal direction, and the pivot 19 rotates together with the swing plate.

  Since the configuration in which the swing plate 18 swings in response to the operation of the travel lever 12 and the main configuration such as the travel drive circuit and the hydraulic circuit of the vibration generator are almost the same as the conventional one, only the configuration different from the conventional one will be described. To do.

  The vibration mode change-over switch 13 switches the operation mode of the vibration generator 9 to any one of a manual mode, an off mode, and an automatic mode. When switching from the neutral off mode to the manual mode, vibration is started, but when switching from the off mode to the automatic mode, vibration is generated in conjunction with traveling. That is, in the automatic mode, when the traveling lever 12 is switched to the forward or reverse position, the vibration roller body 3 vibrates with traveling. On the other hand, when it is desired to run without vibration, the vibration mode changeover switch 13 is set to the off mode, and when it is desired to manually operate the vibration, the manual mode is set.

  Further, in this embodiment, when the engine is started by turning on the main switch (not shown) prior to the operation by the travel lever 12 and the vibration mode change-over switch 13, the engine is in a state where the travel lever 12 is not in the neutral position. Is set not to start. As a result, unexpected start of the vibration roller body 3 and vibration start of the vibration generator 9 are suppressed, and safety is ensured and a roller mark is prevented from being attached to the road surface.

  On the upper surface of the rocking plate 18, two sets of strikers 20a, 20b and two sets of strikers 21a, 21b are arranged on the left and right with reference to a reference line 23 connecting the pivot 19 and the neutral position N. They are provided separately and fixed with bolts 24. A recess 22A is formed in the gap between one striker 20a, 20b, and a recess 22B is formed in the gap between the other striker 21a, 21b. Each striker 20a, 20b and 21a, 21b is provided with a long hole 25 along the swing direction of the swing plate 18, and the bolt 24 passes through the long hole 25 to the swing plate 18. The strikers 20a, 20b and 21a, 21b are fastened together by screwing.

  A limit switch 26A is provided above one striker 20a, 20b, and a limit switch 26B is provided above the other striker 21a, 21b. As described in the conventional example, the limit switch 26A is for starting and stopping the vibration of the vibration generator, and is linked to the solenoid valve of the vibration generator. Further, the limit switch 26B is capable of starting the engine for detecting a neutral position, and is interlocked with a warning buzzer forgetting to release the parking brake when the vehicle starts to travel.

  When the bolts 24 are loosened, the mounting positions of the strikers 20a, 20b and 21a, 21b can be adjusted by moving them in the swing direction of the swing plate 18 within the range of play by the long holes 25. By this adjustment, the positions and widths of the recesses 22A and 22B are changed, and the start and stop timings of the vibration generator for the forward and backward movements and stop movements of the vibration roller body, and the rotation amount of the operation lever 12 The timing of the warning buzzer for forgetting to release the brake can be adjusted.

  The travel and vibration control device 17 according to the present invention includes a hydraulic device such as a travel device and a vibration generator, the swing plate 18, one striker 20a, 20b provided on the swing plate 18, It comprises a recess 22A formed by the strikers 20a and 20b, a limit switch 26A that engages and disengages from the recess 22A and turns on and off. Since the other limit switch 26B and the strikers 21a and 21b are for neutral position detection as described above, detailed description of the operation and the like will be omitted.

  The limit switch 26A is fixed to the vibrating roller body 3 via a fixing bracket 27A at a position facing the upper surface of the swing plate 18. Further, the limit switch 26A is arranged corresponding to a trajectory through which the strikers 20a and 20b and the recess 22A formed therebetween when the swing plate 18 rotates.

  In the limit switch 26A, when the swing plate 18 is disposed at the neutral position N, as shown in FIG. 6, the roller 26Ab falls into the recess 22A of the swing plate 51 and the contact portion is turned off. It is set as follows.

  When the swing plate 18 swings from the neutral position N to the forward position F or the reverse position R with the pivot 19 as a fulcrum in response to the operation of the travel lever 12, the roller 26Ab of the limit switch 26A moves from within the recess 22A. It is pushed out and rides on the striker 20a or 20b. As a result, the actuator 26Aa is immersed and the limit switch 26A is switched from OFF to ON. Therefore, a current flows through the solenoid valve 37 to switch from the closed position to the open position, and the oil discharged from the vibration hydraulic pump 32 is supplied to the vibration hydraulic motor 8 to start the vibration of the vibration generator 9.

  On the other hand, when the swing plate 18 is returned from the forward position F or the reverse position R to the neutral position N by the operation of the traveling lever 12, the roller 26Ab falls again into the recess 22A. As a result, the actuator 26Aa protrudes again and the limit switch 26A is switched from on to off. Therefore, the current to the solenoid valve 37 is cut off and switched to the closed position, the pressure oil from the vibration hydraulic pump 32 to the vibration hydraulic motor 8 is cut off, and the vibration of the vibration generator 9 stops.

  Here, a case will be described in which the start and stop timings of the vibration generating device 9 with respect to the forward / backward start and stop movements of the vibration roller body 3 are to be adjusted according to the preference of the operator. First, the bolts 24 fastened to the swing plate 18 are loosened, the mounting positions of the strikers 20a and 20b are moved within the range of the long holes 25 provided in the strikers 20a and 20b, and the recesses of the strikers 20a and 20b are moved. The position or width of 22A is changed.

  FIG. 7 is an example of a timing chart showing the relationship between the start and end of vibration of the roller 7 with respect to the forward / backward start and stop movements of the vibration roller body 3, and FIG. FIG. 2B shows a timing chart before and after the adjustment when the vehicle is traveling backward.

  In FIG. 7 (1a), the vibration start of the roller 7 is set to be delayed by 0.5 seconds with respect to the movement start of the vibration roller body 3. In FIG. 7 (1b), the mounting position of the striker 20a is set as a reference. By moving slightly with respect to the line 23 and away from the reference line 23, the start of the roller 7 is further delayed by 0.5 seconds with respect to the start of the vibration roller body 3, and adjusted to 1.0 second. In addition, the vibration stop of the roller 7 is further advanced 0.5 seconds with respect to the stop of the vibration roller main body 3 and adjusted to 1.0 second.

  In FIG. 7 (2a), the vibration start of the roller 7 is set to be delayed by 0.5 seconds with respect to the movement of the vibration roller main body 3. In FIG. 7 (2b), the mounting position of the striker 20b is set as a reference. By moving slightly with respect to the line 23 and moving closer to the reference line 23, the start-up of the roller 7 is further shortened by 0.3 seconds with respect to the start-up of the vibration roller body 3, and adjusted to 0.2 seconds. In addition, the vibration stop of the roller 7 is further advanced 0.3 seconds with respect to the stop of the vibration roller main body 3, and adjusted to 0.2 seconds.

  In this way, by adjusting the attachment positions of the strikers 20a and 20b provided on the swing plate 18, the forward and backward movement of the vibration roller body is started and stopped in conjunction with the turning operation of the traveling lever 12. Since the timing of starting and stopping the vibration generator with respect to the movement can be adjusted, the timing of the movement of the vibration roller body 3 by the rotation operation of the traveling lever 12 and the vibration by the vibration generator 9 is adapted to the operator's operational feeling. It can be easily adjusted at the site. As a result, the operability of the operator is improved, and the finish of the construction can be improved by preventing the roller mark or the like from being attached to the pavement surface.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The side view of the vibration roller carrying the vibration control apparatus of the vibration roller which concerns on this invention. The top view of the vibration roller shown in FIG. Explanatory drawing of the A section enlarged part and traveling lever part of FIG. The B section enlarged view of FIG. Explanatory drawing of the principal part of FIG. The perspective view of the principal part of FIG. The timing chart of the vibration control apparatus of the vibration roller which concerns on this invention. The hydraulic circuit diagram which shows a prior art example. Explanatory drawing which shows a prior art example. The perspective view which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration roller 3 Vibration roller main body 4 Traveling hydraulic motor 5 Rear wheel tire 6 Traveling hydraulic motor 7 Roller 8 Vibration hydraulic motor 9 Vibration device 10 Control stand 11 Steering handle 12 Traveling lever 14 Base shaft 17 Traveling and vibration control device 18 Oscillating plate 19 Axis 20a, 20b Striker 22A Recess 24 Bolt 25 Long hole 26A Limit switch 26Aa Actuator 26Ab Roller

Claims (1)

A swinging plate that can swing integrally with the pivot with a pivot that controls the traveling control valve as a fulcrum. The swinging plate is swingable according to the direction of operation of the traveling lever. A limit switch is disposed in the vicinity of a recess provided in the moving plate, and the pivot is rotated by swinging of the swinging plate to control the start and stop of the vibration roller body forward and backward. In the travel and vibration control device of the vibration roller configured to control the start and stop of the vibration generator, the limit switch engages and disengages the recess.
The swing plate is provided with a plurality of strikers in the swing direction so that the position of the striker can be adjusted, and a recess formed by the striker can be adjusted in position with respect to the swing direction of the swing plate. The vibration control device of the vibration roller.

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