JP2021123226A - Tank car - Google Patents

Abstract

To provide a tank car capable of making a communication state of a direction selector valve accurate.SOLUTION: A pipe for discharging liquid in a tank or sucking the liquid in the tank placed on a vehicle body and a direction selector valve 31 arranged in the pipe, have the direction selector valve 31 having a valve body and a valve driving part 47 for driving the valve body and switching a passage of the pipe by driving by the valve body, driving means 45 having an engaging part for engaging with the valve driving part 47 and driving the valve driving part 47 by driving by the engaging part and a control part for controlling driving of the engaging part of the driving means 45, and the control part is constituted so as to drive-control the driving means 45 so as to stop the valve body in a plurality of stopping positions corresponding to respective flow passages so that a passage in the pipe becomes a plurality of different flow passages, and drives-controls the driving means by applying a position dislocation quantity of the engaging part or the valve body to one stopping position in one stopping position of the valve body as a correction value when the valve body moves to the one stopping position and the other stopping position.SELECTED DRAWING: Figure 12

Description

The present invention relates to tank vehicles such as sprinklers and tank trucks.

Patent Document 1 describes a tank vehicle (tank lorry). This tank car is equipped with a tank, a pump and a head valve (direction switching valve).

The head valve is provided with a valve, the valve is supported by a valve support member, and a handle wheel is connected to the valve support member. Further, the steering wheel is driven by an air cylinder, and the steering wheel and the air cylinder are connected via a compound link. Further, a dog for detection is connected to the handle wheel.

In the tank car of Patent Document 1, the valve rotates by operating the steering wheel, and the communication state in the head valve is switched. That is, the communication state of the head valve is the communication state for discharge for discharging the liquid in the tank by the pump, the communication state for gravity for discharging the liquid in the tank by the weight of the liquid in the tank, and the tank by the pump. It is a suction communication state for injecting liquid into.

The discharge communication state, gravity communication state, and suction communication state are detected by a proximity sensor provided on the handle wheel where the dogs to be detected are close to each other, and the proximity sensors are the discharge position sensor, the gravity position sensor, and the suction position. It has a sensor.

Japanese Patent No. 4490949

In the tank vehicle of Patent Document 1, the discharge position sensor, the gravity position sensor, and the suction position sensor detect the rotation state of the valve of the head valve in the discharge communication state, the gravity communication state, and the suction communication state. There is.

However, due to individual differences in the air cylinder, double link, etc., an error occurs in the steering wheel between clockwise and counterclockwise rotation. For this reason, each communication state may be deviated by an error, and an accurate communication state may not be obtained.

Therefore, an object of the present invention is to provide a tank car capable of accurately communicating the communication state of the direction switching valve.

The present invention is a tank mounted on a vehicle body, a pipe for discharging liquid in the tank and sucking liquid into the tank, and a direction switching valve provided in the pipe, wherein the valve body and the valve body and the direction switching valve are provided. It has a valve drive unit that drives the valve body, a direction switching valve that switches the path of the pipe by driving the valve body, and an engaging portion that engages with the valve drive unit. A driving means for driving the valve driving unit by driving the joint portion and a control unit for controlling the driving of the engaging portion of the driving means are provided, and the control unit has a different path in the piping. The drive means is configured to drive and control the valve body so as to stop the valve body at a plurality of stop positions corresponding to each flow path so as to form a plurality of flow paths. The driving means is driven by applying the amount of misalignment of the engaging portion or the valve body with respect to one stop position as a correction value when the valve body moves to the one stop position and the other stop position. It is characterized by controlling.

According to the tank car having the above configuration of the present invention, the control unit drives the engaging portion to place the valve body at a plurality of stop positions corresponding to each flow path so that the path in the pipe becomes a plurality of different flow paths. Since the drive means is driven and controlled so as to stop, the path of the pipe for discharging the liquid or sucking the liquid in the tank can be switched to a desired communication state (flow path) by the direction switching valve.

Here, according to the tank car having the above configuration of the present invention, the control unit determines the amount of displacement of the engaging portion or the valve body with respect to the stop position at one stop position of the valve body at one stop position and another. Since the drive means is driven and controlled as a correction value when the valve body moves to the stop position, the direction switching valve can be accurately communicated with the piping for discharging the liquid in the tank or sucking the liquid.

When there is a misalignment amount different from that of the one stop position, the control device drives the drive means by maintaining the correction value and applying an adjustment value based on the different misalignment amount. A controlled configuration can also be adopted.

As in the above configuration, when the control device has a position shift amount different from that of one stop position, the drive means is driven by maintaining the correction value and applying the adjustment value based on the different position shift amount. Since the drive is controlled, it is easy to adjust for the manufacturing error related to the direction switching valve.

The valve drive unit is a drive shaft connected to the valve body so as to rotate the valve body, and the drive means is a speed reducer having an output shaft as the engagement unit, and the drive shaft and the drive shaft. A configuration can be adopted in which the output shaft is removably engaged with the output shaft via a concave-convex fitting type coupling that engages in the rotation direction of the shaft.

According to the tank car having the above configuration, the drive shaft of the directional control valve and the output shaft of the speed reducer are likely to be misaligned, but the correction value causes the path of the directional control valve to be in an accurate communication state. Moreover, since the speed reducer can be removed while the direction switching valve is installed on the tank car, the direction switching valve can be manually moved when the speed reducer becomes inconvenient.

According to the tank car of the present invention, when driving the valve body of the direction switching valve, the path of the direction switching valve can be accurately communicated.

It is a front view of the sprinkler according to the 1st Embodiment of this invention. It is the same plan view. It is the same block diagram. It is a schematic perspective view of the pipe. It is a partial front sectional view of the same direction switching valve. It is a partial side sectional view of the same direction switching valve. It is the same control block diagram. It is a perspective view of the same direction switching valve and a speed reducer. It is a top view of the same direction switching valve and a speed reducer. It is a partial plan sectional view of the electric motor and a speed reducer. It is a partial plan sectional view showing a main part of the deceleration mechanism. It is the bottom view of the same direction switching valve and a speed reducer. It is a schematic diagram which shows the rotating state of the drive part side part and the speed reducer side part, (a) is a schematic diagram of the state where the speed reducer side part has not rotated yet, (b) is the speed reducer side part. A schematic diagram of a state in which the drive unit side is not yet rotated even if it is rotated, (c) is a schematic diagram of a state in which the speed reducer side and the drive unit side are engaged, and (d) is a speed reducer. It is a schematic diagram of the state in which the side part of a drive part cannot be switched with respect to a reference position even if the side part rotates by 90 ° from a reference position. It is a schematic diagram of the state in which the side part of the drive part is in a normal posture.

Hereinafter, the tank vehicle according to the embodiment of the present invention will be described as a sprinkler vehicle with reference to FIGS. 1 to 14. First, the first embodiment of the present invention will be described.

As shown in FIGS. 1 to 2, in the vehicle body 1 of the sprinkler, the driver's cab 2 is arranged in front and the frame 3 is arranged in the lower rear part of the driver's cab 2. A tank 4 for storing water W (an example of a fluid) is arranged on the upper part of the frame 3 via a support member 5. A partitioned priming chamber 6 is arranged in the lower front part and the corner of the inside of the tank 4. A full water sensor 11 is arranged above the tank 4 to detect when the water W is full in the tank 4.

In such a sprinkler, the front watering nozzles 9 and 9 and the rear lower part of the frame 3 are arranged in the lower part of the driver's cab 2 so that the water W is discharged from the lower part of the driver's cab 2 and the rear part of the frame 3. The rear watering nozzles 10 and 10 are provided. From this, it is possible to sprinkle water on the road surface of the construction site. Further, the sprinkler is configured to absorb water W into the tank 4 via a water absorption hose 13 from an external facility such as a water storage tank 12 when the water W is insufficient in the tank 4.

That is, as shown in FIGS. 3 and 4, the watering nozzle is provided with a pipe (circuit) for sprinkling water W from the tank 4 and absorbing water W to the tank 4. This pipe is for discharging the water W in the tank 4 and sucking the water W into the tank 4, and includes the tank pipe 15, the priming pipe 16, the merging pipe 19, the front watering pipe 17, and the water absorption. A pipe 18, a direction switching circuit 20, a water discharge pipe 21, and a rear watering pipe 22 are provided.

The tank pipe 15 is arranged in the middle of the lower part of the tank 4. A front watering pipe 17 is connected to the end side of the tank pipe 15, and a pair of sluice valves (ball valves) 24, 24 are arranged at the end of the front watering pipe 17. The front watering nozzles 9 and 9 are arranged at the ends of the sluice valves 24 and 24 via a watering hose 24a. Further, a front valve (solenoid valve) 25 is connected in the middle of the front watering pipe 17.

The priming pipe 16 is arranged at the front end of the lower part of the tank 4, and the priming pipe 16 can communicate with the priming chamber 6 partitioned by the tank 4.

A priming valve (solenoid valve) 26 is connected to the tank 4 side of the priming pipe 16. Further, the water absorption pipe 18 is connected to the end side of the priming pipe 16, and the water absorption port 27 is connected to the end of the water absorption pipe 18. A water absorption valve (solenoid valve) 28 is connected to the water absorption pipe 18. A water absorption hose 13 is detachably connected to the water absorption port 27. A strainer 29 is arranged at the tip of the water absorption hose 13. The strainer 29 and a part of the water absorption hose 13 can be immersed in the water storage tank 12.

The tank pipe 15 and the priming pipe 16 are connected by a merging pipe 19 that joins them.

The merging pipe 19 and the front pipe 30 described later are connected via a direction switching valve 31. Here, the direction switching circuit 20 including the direction switching valve 31 will be described. The direction switching circuit 20 includes a direction switching valve 31, a pump 32, and a relief valve 33.

The port of the direction switching valve 31 will be described. First, the directional control valve 31 is a four-way valve connected to the driving means. The driving means includes an electric motor 34 and a speed reducer 45, and the speed reducer 45 will be described in detail later.

As shown in FIGS. 5 and 6, the four-way valve has a ball 46 to which an elbow pipe 46a is connected inside the case 31A. The electric motor 34 and the speed reducer 45 are built in the tank side operation unit F (see FIG. 1), and the rotary shaft 56 of the speed reducer that outputs the power of the drive means uses the ball 46 of the direction switching valve 31. It is connected to a drive shaft 47 as a valve drive unit to be rotated via an engaging portion.

The merging pipe 19 is connected to the [a] port of the direction switching valve 31. An inflow pipe 35 is connected to the inflow side of the water W in the pump 32, and the end of the inflow pipe 35 is connected to the [b] port of the direction switching valve 31. An outflow pipe 37 is connected to the outflow side of the water W in the pump 32, and the outflow pipe 37 is connected to the [c] port of the direction switching valve 31. The relief valve 33 is arranged on the merging pipe 19 side of the outflow pipe 37. The front pipe 30 described above is connected to the [d] port of the direction switching valve 31, and the end of the front pipe 30 is arranged at a connection point T between the front watering pipe 17 and the water absorption pipe 18 (see FIG. 4). ).

As shown in FIG. 5, the posture in which the ball 46 connects the [a] port and the [c] port is 0 °, and counterclockwise rotation is forward rotation and clockwise rotation is reverse rotation. Here, in the direction switching valve 31 of the present embodiment having ports of 90 ° each, the normal posture is 90 ° for connecting to the [d] port, and 180 ° for the lower part of the case 31A and the ball 31 to face each other. °, and the posture of connecting to the [b] port are defined as 270 °, respectively.

The pump 32 is driven by a pulley mechanism 36, which is connected to the sprinkler engine (PTO). The above is the configuration of the direction switching circuit 20.

Further, the water discharge pipe 21 is connected to the front pipe 30, and the water discharge port 38 is connected to the end of the water discharge pipe 21. Further, in the water discharge pipe 21, a water discharge valve 39 is arranged on the water discharge port 38 side.

The rear watering pipe 22 is arranged behind the lower part of the frame 3 of the tank 4 (see FIG. 1). At the end of the rear watering pipe 22, rear watering nozzles 10 and 10 connected to the sluice valves (ball valves) 40 and 40 are arranged. A rear watering valve 41 is arranged between the base end of the tank 4 and the rear watering nozzles 10 and 10 in the rear watering pipe 22.

As shown in FIG. 7, a control unit 48 is connected to the tank side operation unit F and the cab operation unit, except for the relief valve 33, the sluice valve 24, 24, the sluice valve 40, 40, and the water discharge valve 39. The valve is controlled and operated by the control unit 48. Further, in the direction switching valve 31, the ball 46 is driven by the electric motor 34 being controlled by the control unit 48, and the ports [a] to [d] communicate with the pipe via the ball 46. It is configured.

The structure of the speed reducer 45 described above will be described with reference to FIGS. 8 to 12. As shown in FIGS. 8 and 9, the speed reducer 45 includes a metal housing 49 and a speed reduction mechanism 50 housed in the housing 49 as shown in FIGS. 10 and 11.

As shown in FIG. 10, the speed reduction mechanism 50 connected to the output shaft 34a of the electric motor 34 first reduces the motor output of the worm gear mechanism 52 including an input shaft 52a connected to the output shaft 34a of the electric motor 34. The primary deceleration is further performed on the output side of the worm gear mechanism 52, that is, the secondary deceleration is performed on the gear train 54 connected to the worm wheel 53 as shown in FIG. A part of the rotating shaft 56 that rotates integrally with the output gear 55 of the gear train 54 extends outside the housing 49. Further, the rotating shaft 56 corresponds to the output shaft of the speed reducer 45.

As shown in FIG. 11, a portion of the rotating shaft 56 extending out of the housing 49 is referred to as an extension portion 57. As shown in FIG. 12, the extension portion 57 is fitted with a primary gear 58. Further, a drive shaft 47 for driving the ball 46 of the direction switching valve 31 is arranged substantially coaxially with the rotation shaft 56. The extension portion (extension shaft) 57 and the drive shaft 47 are connected by an Oldham type coupling 59.

The coupling 59 is a concave-convex fitting type, and locks the drive shaft 47 of the ball 46 and the rotation shaft 56 (extension portion 57) of the speed reducer 45 in the circumferential direction. That is, the coupling 59 is configured so that the drive portion side portion 60 provided on the drive shaft 47 of the ball 46 and the reduction gear side portion 61 fitted on the rotation shaft 56 of the reduction gear 45 can be locked in the circumferential direction. Has been done. A plurality of convex portions are arranged side by side with a space between the drive portion side portion 60 and the speed reducer side portion 61 in the circumferential direction, and a concave portion is formed between the convex portions.

Then, the drive unit side portion 60 and the speed reducer side portion 61 are connected by fitting one convex portion into the other concave portion. As a result, the convex portion of the drive portion side portion 60 and the convex portion of the speed reducer side portion 61 are adjacent to each other in the circumferential direction and are engaged with each other. In the coupling 59, the drive portion side portion 60 rotates back and forth in the circumferential direction with respect to the rotation of the speed reducer side portion 61.

Returning to FIG. 12, outside the housing 49, a mounting member B arranged in parallel with the side surface 49a of the housing 49 is arranged. A boss portion 63 is arranged on the outer surface of the mounting member B, and a bush 64 is arranged at the axial center of the boss portion 63. The bush 64 is fixed by a bolt 62 so as not to come out from the boss portion 63 in the axial direction. A secondary gear 65 that meshes with the primary gear 58 is fitted in the bush 64. A positioning element 66 is fitted onto the protruding portion of the bush 64 from the secondary gear 65, and the positioning element 66 rotates together with the secondary gear 65.

Then, an angle sensor (rotary encoder) 67 is arranged outside the positioning element 66, and the angle sensor 67 detects the rotation angle of the positioning element 66 that rotates together with the secondary gear 65. That is, an angle sensor 67 (angle detecting means) for detecting the rotation angle of the rotating shaft 56 is arranged in the speed reducer 45, and the rotation angle of the rotating shaft 56 is detected by the angle sensor 67 and is detected by the control unit 48. Entered.

Further, the angle sensor 67 is connected to the input terminal of the control unit 48 with an output signal line, and the positioning element 66 is connected to the input side of the angle sensor 67.

The sprinkler is operated by an operator by a tank-side operation unit F (see FIG. 1) arranged in front of the upper part of the frame 3. The following is an example of the flow of water W in the sprinkler.

In the present embodiment, at least the automatic priming mode switch S1 and the water absorption mode switch S2 are arranged on the tank side operation unit F. When the automatic priming mode switch S1 is operated by an operator, the water absorption hose 13 immersed in the water storage tank 12 prepares for water absorption, that is, sends water W from the priming chamber 6 to the water absorption hose 13. Make it work. Further, when the water absorption mode switch S2 is operated by an operator, the tank 4 is filled with water W via the water absorption hose 13, and the tank 4 is filled with water by the full water sensor 11.

Further, the discharge operation from the front watering nozzles 9 and 9 and the rear watering nozzles 10 and 10 is performed by the driver's cab operation unit, and this driver's cab operation unit is arranged in the driver's cab 2 (for example, dashboard). .. In this case, a front watering switch for turning on / off the discharge of the front watering nozzles 9 and 9 is provided, and a rear watering switch for turning on / off the discharge of the rear watering nozzles 10 and 10 is provided.

The watering operation of the watering nozzle having the above configuration is performed as follows. It is assumed that the tank 4 is filled with water W or is close to it, the engine (PTO) is driven, and the operator opens the sluice valves 24 and 24, and the cab operation unit is arranged in the cab 2. Consider the case where the front sprinkler switch is turned on.

In this case, the control unit 48 closes the priming valve 26, the water absorbing valve 28, and the rear watering valve 41, opens the front valve 25, and rotates the ball 46 of the direction switching valve 31 to the watering position. , The tank pipe 15, the merging pipe 19, the front pipe 30, and the front watering pipe 17 are opened (communicated with each other), and water W is discharged from the front watering nozzles 9 and 9 of the sprinkler.

At this time, the control unit 48 outputs a drive signal to the drive means, that is, the electric motor 34 so as to open from the [a] port to the [d] port to drive the rotary shaft 56 of the speed reducer 45. As a result, the coupling 59 engages in the circumferential direction. That is, the speed reducer side portion 61 fitted to the rotating shaft 56 of the speed reducer 45 is driven to the drain side, and the drive unit side portion 60, which is the drive unit 47 of the ball 46, is locked back and forth in the circumferential direction. do.

At this time, since there is a gap between the convex portion of the reduction gear side portion 61 and the convex portion of the drive portion side portion 60, the reduction gear side portion 61 rotates when moving back and forth to the drive portion side portion 60 in the circumferential direction. There is a misalignment in the direction.

The control unit 48 is the amount of misalignment of the coupling 59 (drive unit side 60) with respect to one stop position of the ball 46, that is, in this case, the position of the ball 46 that opens from the [a] port to the [d] port. The position of the ball 46, which is open from the one stop position and the other stop position, for example, from the [a] port to the [b] port, and from the [c] port to the [d] port, [a] port. The position of the ball 46 that opens from the [c] port to the [b] port to the [d] port, the position of the ball 46 that does not open either the [a] port or the [d] port, etc. The electric motor 34 is driven and controlled by applying it as a correction value when moving to a position.

When the front watering switch of the driver's cab operation unit is turned off, the control unit 48 closes the front valve 25 and stops the water W from the front watering nozzles 9 and 9.

Water W may be discharged from the water discharge pipe 21 by the pump 32 by the water force. In this case, the control unit 48 closes the priming valve 26, the water absorption valve 28, and the rear watering valve 41, closes the front valve 25, and rotates the ball 46 of the direction switching valve 31 to the water discharge position. The tank pipe 15, the merging pipe 19, the front pipe 30, the inflow pipe 35, and the outflow pipe 37 are opened (communicated), and water W is discharged from the water discharge pipe 21 of the watering nozzle.

At this time, the control unit 48 outputs a drive signal to the electric motor 34 so as to open from the [a] port to the [b] port and from the [c] port to the [d] port, and causes the speed reducer 45 to open. Drive the rotating shaft 56. As a result, the coupling 59 engages in the circumferential direction. That is, the speed reducer side portion 61 fitted to the rotation shaft 56 of the speed reducer 45 is driven to the water sprinkling side and moves back and forth in the circumferential direction, and the drive unit side portion 60, which is the drive unit 47 of the ball 46, is locked. do.

The control unit 48 determines the amount of misalignment of the coupling 59 with respect to one stop position of the ball 46, that is, in this case, the position of the ball 46 that opens from the [a] port to the [d] port, from the [a] port. It is applied as a correction value when moving from the [b] port to the open position and from the [c] port to the [d] port, and the coupling 59 is driven and controlled. The amount of misalignment of the coupling 59 with respect to one stop position is also applied to the movement to the other stop position.

When the rear watering switch of the cab operation unit arranged in the cab 2 is turned on, when the operator opens the sluice valves 40 and 40, the control unit 48 opens the rear watering valve 41 to the rear. Water W is discharged from the watering nozzles 10 and 10 by its own weight. When the rear watering switch is turned off, the control unit 48 closes the rear watering valve 41 and stops the water W discharged by its own weight from the rear watering nozzles 10 and 10. It is possible that both the front sprinkler switch and the rear sprinkler switch are turned on.

By the way, consider the case where the water W is insufficient in the tank 4. In such a case, in order to fill the tank 4 with water W, the sprinkler is stopped near the water tank 12, and the tip of the water absorption hose 13 (strainer 29) is immersed in the water tank 12. Also, the engine is still running.

Then, the operator turns on the automatic priming mode switch S1 of the tank side operation unit F. Then, the control unit 48 opens the priming valve 26, drives the electric motor 34, and locks the speed reducer side portion 61 of the speed reducer 45 and the drive unit side portion 60 of the ball 46 in the circumferential direction. The ball 46 of the direction switching valve 31 is rotated to a position where it is opened from the [a] port to the [d] port. As a result, the merging pipe 19 and the front pipe 30 are connected. The other valves that are closed by the control unit 48 are the rear watering valve 41 and the front valve 25.

Further, the control unit 48 moves the ball 46 by one stop position of the ball 46, that is, in this case, the amount of misalignment of the coupling 59 with respect to the ball 46 which is open from the [a] port to the [d] port. It is applied as a correction value at the time, and the coupling 59 is driven and controlled.

Since the priming pipe 16 is arranged in the priming chamber 6 partitioned by the tank 4, the water W in the priming chamber 6 is discharged from the merging pipe 19, the front pipe 30, and the water absorbing pipe 18, and the water absorbing hose Run water to 13. That is, in order to store the water W in the tank 4, the water W in the priming chamber 6 is naturally dropped to be used as the priming water in the priming route. Further, the standby time for the water W to flow out to the water absorption hose 13 is set by the control unit 48 for a predetermined time (for example, 20 seconds). The above is the automatic priming mode.

When the automatic priming mode ends and the water absorption mode switch S2 is turned on by the operator, the control unit 48 shifts to the water absorption mode. In the water absorption mode, the pump 32 of the direction switching circuit 20 is used. Therefore, the control unit 48 drives the electric motor 34, locks the speed reducer side portion 61 of the speed reducer 45 and the drive unit side portion 60 of the ball 46 in the circumferential direction, and locks the ball 46 of the direction switching valve 31. To the [d] and [b] ports, and the ball 46 to open from the [d] port to the [b] port and from the [c] port to the [a] port. Rotate to the position of. As a result, the water absorption pipe 18, the front pipe 30, and the inflow pipe 35 are connected, the outflow pipe 37, the merging pipe 19, and the priming pipe 16 are connected, and the water W of the water storage tank 12 is transferred from the priming chamber 6 to the tank 4. It is stored in.

When the ball 46 is rotated from the [d] port to the [b] port and from the [c] port to the [a] port, the ball 46 is opened from the [a] port to the [d] port. It is applied as a correction value for the amount of misalignment of the coupling 59 with respect to the ball 46, and the coupling 59 is driven and controlled. In this way, the amount of misalignment of the coupling 59 with respect to the position of opening from the [a] port to the [d] port is also applied when moving to another stop position of the ball 46. The function of the relief valve 33 is to send water W to the merging pipe 19 when the rotation speed of the engine (PTO) increases.

By the way, when the pump 32 is driven, the water W of the water storage tank 12 flows into the water absorption hose 13. Here, in the automatic priming mode, the water absorption hose 13 is sufficiently filled with the water W of the priming chamber 6 as priming water, so that the water W of the water storage tank 12 can be easily sucked into the tank 4. Since the full water sensor 11 is arranged in the tank 4, it can detect full water.

As described above, the water W in the sprinkler is rotated so that the ball 46 of the direction switching valve 31 of the direction switching circuit 20 becomes a piping path according to the mode in which the water W flows. Although it flows through each of the ports b], [c], and [d], it is difficult to directly measure the rotation angle of the ball 46 of the direction switching valve 31.

Therefore, the ball 46 is driven via a driving member such as a speed reducer 45 or a coupling 59, and the control unit 48 detects the amount of rotation of the positioning element 66. Since the member has a difference from the rotation amount of the ball 46 due to the individual difference of the member interposed between the member and the ball 46, the rotation amount measured by the angle sensor 67 is required to rotate the ball 46 accurately. The control unit 48 applies a correction value to the ball 46, and then grasps (estimates) the posture of the ball 46.

Further, the control unit 48 sets the amount of rotational deviation of the drive member at one stop position of the ball 46 as a correction value applied to the drive of the drive member when moving to the other stop position of the ball 46. Among the driving members, the one having the largest amount of rotational deviation is the uneven fitting type coupling 59. Therefore, it was decided to consider the amount of rotational deviation of the coupling 59 as a reference value for determining the correction value.

In the circle of the coupling 59 of FIGS. 13 and 14, the solid line is the center line of the speed reducer side portion 61 fitted to the rotating shaft 56 of the speed reducer 45, and the alternate long and short dash line is provided on the drive unit 47 of the ball 46. The center line of the drive unit side 60 is shown.

In FIG. 13A, the position where the speed reducer side portion 61 has not yet rotated is set as the reference position of the coupling 59. Further, it is assumed that the difference due to the individual difference of the coupling 59 is 2 °. Therefore, the operator sets the correction value to 2 ° and stores it in the control unit 48 by operating the tank side operation unit F. The amount of rotation of the positioning element 66 detected by the angle sensor 67 is input to the control unit 48.

For example, in FIG. 13, one side is rotated counterclockwise. Even if the speed reducer side 61 is rotated to one side by rotating the electric motor 34 to drive the rotation shaft 56 of the speed reducer 45 by the control unit 48, the speed reducer side 61 is still the drive side. Since it is arranged at 60 via a gap 68 in the circumferential direction, the drive unit side portion 60 does not rotate. Therefore, the ball 46 of the direction switching valve 31 maintains the posture so far (see FIG. 13B).

When the speed reducer side portion 61 is further rotated, the gap 68 is eliminated on one side, the speed reducer side portion 61 and the drive portion side portion 60 mesh with each other, and the drive portion side portion 60 starts rotating. .. That is, the ball 46 starts rotating counterclockwise (see FIG. 13C).

Subsequently, the speed reducer side portion 61 further rotates and rotates by 90 ° from the reference position in FIG. 13 (a). However, since the correction value is set to 2 °, even if the speed reducer side portion 61 rotates by 90 ° from the reference position, the drive portion side portion 60, that is, the ball 46 cannot be switched to the stop position ( See FIG. 13 (d)).

Therefore, the control unit 48 further rotates the speed reducer side unit 61 by 2 ° of the correction value (see FIG. 14). As a result, the drive unit side portion 60 rotates by 2 ° of the correction value, and the ball 46 also rotates by 2 ° of the correction value, so that the ball 46 is in the normal posture (that is, the correct stop position). Rotate like this.

Further, the other side is the right rotation of the ball 46. When the other side is rotated clockwise, for example, when the ball 46 is rotated clockwise, the amount of rotation of the coupling 59 is the speed reducer side as in the case of counterclockwise rotation, assuming that the correction value is 2 ° in the individual difference. By rotating the portion 61 by 2 °, the ball 46 is rotated so as to have a normal posture.

For example, when the water absorption mode switch S2 is turned on to move the ball 46 to the position of the ball 46 which opens from the [d] port to the [b] port and opens from the [c] port to the [a] port. It is applied as a correction value to drive and control the coupling 59. The amount of misalignment of the coupling 59 with respect to one stop position is also applied to the movement to the other stop position.

When there are left rotation and right rotation of the ball 46, in the ball 46, the speed reducer side portion 61 is driven, for example, at a correction value of 2 ° so as to approach the target stop position at the shortest distance. Let me.

In this way, the control unit 48 decelerates the correction value at the port which is one stop position of the ball 46 according to the individual difference of the coupling 59 as the correction value when moving to the port which is the other stop position. The rotation angle of the rotation shaft 56 of the machine 45 is detected by the positioning element 66, and the speed reducer side portion 61 is driven and controlled. As a result, the piping for discharging and sucking the water W in the tank 4 can be accurately communicated by the path of the direction switching valve 31.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the rotation of the ball 46 is driven and controlled by a correction value according to the individual difference of the coupling 59.

However, when the control unit 48 has an error due to the manufacture of the case 31A of the direction switching valve 31 and the seal assembly, and the stopping posture of the ball that does not leak water is different from the initially defined stopping posture (when there is a posture deviation amount). The coupling 59 is driven and controlled by applying adjustment values based on the different posture deviation amounts. At this time, the above-mentioned correction value (2 °) is maintained.

This will be described in detail. Consider a case where the posture of the stop position (posture 270 °) that opens from the [a] port to the [d] port of the direction switching valve 31 is 269 ° and the posture deviation amount is 1 °. By operating the tank-side operation unit F, the operator stores the adjustment value “-1 °” of the [d] port stop posture corresponding to the posture deviation amount “-1 °” in the control unit 48. It should be noted that the stop posture may be directly changed and memorized without using the adjustment value.

Even in this case, the amount of misalignment of the coupling 59 matches the amount of misalignment of the correction value when the ball 46 moves to another stop position, so the same correction value (2 °) is applied. Let me. For example, when rotating from an open posture (posture 0 °) to the [c] port to an open posture (posture 90 °) to the [d] port, the speed reducer side portion so that the ball 46 rotates forward. Rotate 61. Then, 2 ° of the correction value of the coupling 59 at the stop position is added to the stop posture 89 ° in consideration of the adjustment value “-1 °”, and the angle sensor 67 stops when the angle sensor 67 detects that the temperature has reached 91 °.

On the other hand, when rotating from the posture facing the case 31A (posture 180 °) to the posture open to the [d] port (adjusted stop posture 89 °), the reverse rotation is the shortest, so the control unit 48 rotates the speed reducer side portion 61 so that the ball 46 rotates in the reverse direction. Then, 2 ° of the correction value of the coupling 59 at the stop position is subtracted from the stop posture of 89 °, and when the angle sensor 67 detects that it has reached 87 °, it is stopped. As a result, the ball 46 can be rotated to the normal posture (correct other stop position).

In the above embodiment, the member has been described as an Oldham type coupling 59 having the largest amount of rotational deviation, but in addition to the coupling 59, a reduction mechanism 50 or the like, a ball 46 and an angle sensor 67 (rotary encoder) are used. It is also possible to take into account the individual differences of the members intervening between them. Further, in the present embodiment, the correction value is determined as the amount of misalignment of the engaging portion (output shaft) when the ball 46 is positioned at the correct stop position (specifically, the misalignment of the coupling 59). However, the correction value can also be obtained based on the position of the ball 46 when the output shaft is rotated by a predetermined angle.

In the embodiment of the present invention, the driving unit 47 of the ball 46 and the rotating shaft 56 of the speed reducer 45 are connected by an Oldham type coupling 59. The speed reducer 45 can also be configured to be removable via the coupling 59. Further, the engaging portion may be in a form of driving the valve body (ball 46) by sliding in the axial direction or the radial direction.

In the above embodiment, the amount of displacement of the engaging portion with respect to one stop position at one stop position of the valve body is adopted as a correction value when the valve body moves to one stop position and another stop position. However, the amount of displacement of the valve body with respect to one stop position at one stop position of the valve body can be used as a correction value when the valve body moves to one stop position and another stop position.

If the direction switching valve 31 and the speed reducer 45 can be removed, the speed reducer 45 can be removed while the direction switching valve 31 is installed on the tank car. Therefore, when the electric motor 34 or the speed reducer 45 is inconvenient, the direction switching valve 31 can be manually moved.

In the above configuration, an example in which the drive means has a speed reducer is shown, but a direct drive type electric motor that does not use a speed reducer may be used, and the motor output shaft 34a may have an engaging portion. Further, the speed reducer of the driving means has been described as a speed reducer 45 in which the worm gear mechanism 52 performs the primary deceleration and the gear train 54 connected to the worm wheel 53 performs the secondary deceleration on the output side of the worm gear mechanism 52. However, although not shown, a speed reducer that further performs tertiary deceleration may be used.

The present invention does not have to be a sprinkler, and may be a tank truck that carries oil and chemicals and has a tank.

1 ... car body, 2 ... driver's cab, 4 ... tank, 6 ... priming room, 15 ... tank piping, 16 ... priming piping, 17 ... front watering piping, 18 ... water absorption piping, 19 ... merging piping, 20 ... direction switching Circuit, 22 ... Rear watering pipe, 30 ... Front pipe, 31 ... Direction switching valve, 32 ... Pump, 34 ... Electric motor, 34a ... Output shaft, 35 ... Inflow pipe, 37 ... Outflow pipe, 45 ... Reducer, 46 ... Ball, 47 ... Drive unit (drive shaft), 48 ... Control unit, 50 ... Reduction mechanism, 52 ... Worm gear mechanism, 53 ... Worm wheel, 54 ... Gear train, 55 ... Output gear, 56 ... Rotating shaft, 58 ... Primary gear , 59 ... Coupling, 60 ... Drive side, 61 ... Reducer side, 65 ... Secondary gear, 66 ... Positioning element, 67 ... Angle sensor (rotary encoder), 68 ... Gap, W ... Water, F ... Tank Side operation unit, B ... Mounting member

Claims (3)

The tank that can be mounted on the car body and
Piping for discharging the liquid in the tank and sucking the liquid into the tank,
A direction switching valve provided in the pipe, which has a valve body and a valve drive unit for driving the valve body, and a direction switching valve for switching the path of the pipe by driving the valve body.
A driving means having an engaging portion that engages with the valve driving portion and driving the valve driving portion by driving the engaging portion.
A control unit for controlling the drive of the engaging portion of the drive means is provided.
The control unit is configured to drive and control the drive means so as to stop the valve body at a plurality of stop positions corresponding to each flow path so that the path in the pipe becomes a plurality of different flow paths.
When the valve body moves to the one stop position and the other stop position by the amount of misalignment of the engaging portion or the valve body with respect to the one stop position at one stop position of the valve body. A tank car characterized in that the drive means is driven and controlled by being applied as a correction value of. When there is a misalignment amount different from that of the one stop position, the control device drives and controls the drive means by maintaining the correction value and applying an adjustment value based on the different misalignment amount. The tank car according to claim 1. The valve drive unit is a drive shaft connected to the valve body so as to rotate the valve body, and the drive means is a speed reducer having an output shaft as the engagement unit, and the drive shaft and the drive shaft. The tank wheel according to claim 1 or 2, wherein the output shaft is removably engaged with the output shaft via a concave-convex fitting type coupling that engages in the rotation direction of the shaft.

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