JPH0232177B2 - JIDOSHANOKABUSENJOHOHOOYOBISONOSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an apparatus for cleaning the lower part of an automobile as a pre-process of inspection and maintenance of the automobile, and more specifically, the present invention relates to a method and an apparatus for cleaning the lower part of an automobile that is stopped at a predetermined position on the floor. The present invention relates to a method and apparatus for cleaning using a cleaning device that travels above.

In conventional automobile lower part cleaning techniques, there are techniques in which an injection nozzle that injects cleaning liquid into the lower part of an automobile is moved along a predetermined path, and the injection nozzle is oscillated or drawn in an arcuate trajectory.
In this case, generally, a truck is provided that can freely move back and forth in the longitudinal direction of the vehicle, and this truck carries an injection nozzle, and the range of movement of the injection nozzle is determined in advance based on the performance of the cleaning device. There are many cases. Therefore, large vehicles may not be completely washed, and small vehicles may be subject to inconveniences such as wasted cleaning fluid and splashing of muddy water because the cleaning fluid is sprayed far beyond the width of the vehicle.

On the other hand, it is also difficult and troublesome to move the vehicle to be washed along a predetermined reciprocating path of the washing device. If the central axis of the vehicle in the longitudinal direction (vehicle length direction) and the reciprocating path of the cleaning device are not aligned, the cleaning device will shift to the side of the vehicle as it moves in the longitudinal direction of the vehicle, causing the cleaning solution to be sprayed out on one side and not enough on the other. Cleaning liquid is not sprayed, resulting in insufficient cleaning. In this case, the wheels become an obstacle and the lack of cleaning is exacerbated, resulting in the inconvenience that the areas around the wheels that require cleaning are not cleaned.

The present invention has been made in view of the above points, and is a method that can always inject a sufficient amount of cleaning liquid to the required parts regardless of the type of vehicle or the entry position, and can efficiently clean the lower part of a vehicle with low equipment costs. The purpose is to provide such equipment.

Hereinafter, the configuration of the present invention will be explained based on specific examples. FIG. 1 is an explanatory diagram showing the overall structure of an automobile lower part cleaning device as an embodiment of the present invention. A guide rope 1 serving as a guide member for guiding the reciprocating movement of a lower washer W is stretched over a predetermined distance in a car wash workshop into which a car M to be washed enters. In this case, the tension of the guide rope 1 is set so that the lower washer W can be guided in the vehicle length direction within a predetermined allowable width, that is, the lower washer W can be guided not only in the vehicle length direction but also in the vehicle width direction. It is set to an appropriate size so that it can be moved within the range. In this example, a spring 2 is interposed at one end of the guide rope 1, and its elasticity is utilized to ensure a necessary guide width. Note that it is also possible to secure the necessary guide width by tensioning only the rope with an appropriate tension by utilizing the elasticity of the rope itself without intervening an elastic member such as a spring. Along the guide rope 1, at both ends thereof, there are stoppers 3, which determine the range in which the lower washer W is run according to the length L of the automobile M to be washed.
4 are movably installed. Therefore, each time the lower washer W comes into contact with the stopper 3 or 4, the traveling direction is reversed by the traveling reversal mechanism described later, and the lower washer W reciprocates between them.
The injection nozzle 5 provided in the vehicle can move over the entire vehicle length L. When the length of the vehicle to be washed changes, it is sufficient to simply change the positions of the stoppers 3 and 4 according to the length of the vehicle. A high-pressure hose H that supplies washing water and electricity used for car washing to the lower washing machine W,
H and captire cord C are each hose reel.
It is stored in the Hr, Hr and cord reel Cr so as to be freely retractable, and is freely extended along the extending direction of the guide rope 1 as the lower washer W travels.

Next, the configuration of the lower part washer W will be explained.
FIG. 2 is an overall perspective view of the inside of the lower washer W. For convenience of explanation, the electrical supply wiring to each operation drive motor in the lower washer W is omitted. The height of the lower part washer W in this example is 150mm.
Therefore, the lower part of almost all types of automobiles can be washed by simply driving the vehicle in the longitudinal direction of the vehicle. The lower part washer W can be formed into such a compact flat type because
This is due to the configuration unique to the present invention described below. The lower part washer W is constructed by mounting various necessary devices such as an injection nozzle 5 on a cart 6. At each of the four corners of the truck 6, four flexible wheels 7 are mounted, which can freely change the running direction over 360 degrees, front and rear, left and right. The guide rope 1 described above is inserted through the bottom of the truck 6 along its front-rear direction (running direction). Therefore, when no external force acts on the trolley 6 in any direction other than the front-rear direction, the trolley 6 travels along the guide rope 1. However, when an external force acts on the trolley 6 in a direction other than the front-rear direction, the guide rope 1 flexibly moves accordingly. The running direction can be changed within a set allowable width. In this embodiment of the truck 6, a motor 8 for driving the vehicle is disposed at the front portion thereof. A pulley 9 is connected to the running drive motor 8, and a guide rope 1 is wound around the pulley 9 halfway. In this case, the motor 8 is installed slightly obliquely to the extending direction (running direction) of the rope 1 to prevent the ropes 1 wound around the pulley 9 from coming into contact with each other. Therefore, by rotating the pulley 9, the rope 1 can be pulled and the trolley 6 can run smoothly, and by changing the rotation direction of the pulley 9, the running direction of the trolley 6 can be reversed. Can be done.

Sensing plates 10 and 11 are disposed at the front and rear ends of the truck 6, respectively, so as to come into contact with the stoppers 3 and 4 that restrict the travel range described above and sense the restrictions. The sensing plates 10 and 11 of this example are rotatably supported and are interposed with a biasing member (not shown) such as a spring, and when they come into contact with the stoppers 3 and 4, the sensing plates are biased. Rotate against it.
Each sensing plate 10, 11 has a limit switch 1.
Detectors 2 and 13 are brought into contact with each other, and each limit switch 12 and 13 is connected to a travel drive motor 8. Therefore, when each sensing plate comes into contact with the corresponding stopper and rotates, this is detected and each limit switch is activated to change the direction of rotation of the traveling drive motor 8 and reverse the traveling direction of the truck 6.

At the center of the truck 6, at least a pair of spraying devices J for spraying cleaning water are disposed so as to be movable toward and away from each other in the width direction perpendicular to the front-rear direction. In this example, a pair of injection devices J and J, each of which is formed to have approximately the same length as the width of the truck 6, is installed at the third a
A reciprocal movement is made between the retreat position shown in the figure, where both are located in parallel above the trolley 6, and the advanced position, shown in FIG. It is installed so that it can be moved back and forth in conjunction with the Each of the injection devices J, J is held at one end by arms 14, 15, respectively, which are connected to an interlocking mechanism to be described later, and the center and tip portions thereof have
One injection nozzle 5 is provided in each case. Water distribution pipes 16 and 17 are connected to each injection nozzle 5, respectively, and are connected to hoses H and H for high-pressure washing water from the outside.

Each injection device J is configured as shown below so that it can swing not only in the width direction but also in the front-rear direction. FIG. 4 is a schematic side view of the vicinity of the injection device J, in which the injection nozzle 5 is held by a holder 19 rotatably supported on a support shaft 18 extending over the entire length of the injection device J. . The holder 19 has an engaging leg 19a extending over substantially the entire length of the injection device J.
is formed, and its tip is shaped like a round bar. On the other hand, as shown in FIG. 2, rocking members 20, 20 each having a substantially cylindrical shape are disposed at both ends of the truck 6, respectively. The swinging member 20 is rotatably supported by a rotating shaft 21, and has a round-bottomed engagement groove 20a recessed in the center thereof over its entire circumference. The round bar portion at the tip of the engaging leg 19a is engaged with the engaging groove 20a. In FIG. 2a, each swinging member 20 is connected to a swinging motor 25 via a link mechanism including a vertical rod 22, a horizontal rod 23, etc., and a crank mechanism including a crank 24, etc. Therefore, the rotation of the swing motor 25 is converted into a reciprocating rotation via the crank mechanism, and the link mechanism converts the rotation into a reciprocating linear motion along the front-rear direction and transmits it to each swing member 20, 20. When the swinging member 20 reciprocates in the front-rear direction (arrow A direction), the holder 19 that engages with the swing member 20 reciprocates around the support shaft 18, and the injection nozzle 5 swings in the front-rear direction. In this case, since the curvatures of the contact surfaces of the mutually engaging members are different, they engage in a state close to point contact, and furthermore, since the swinging member 20 rotates as the injection device J moves in the width direction, the frictional resistance The injection nozzle 5 can be smoothly moved and swung in the width direction while minimizing the noise. Each injection device J has a holder 19 with a swing regulating member 26 for regulating its swing.
It is coated so that it can move integrally with the body. Regulation member 26
are formed to extend along the longitudinal direction of the injection device J, and each part of the injection nozzle 5 corresponding to the injection direction is provided with an injection port 26a, so that the washing water is blocked by the regulating member 26. It is sprayed towards the bottom of the car without being affected. With this regulating member 26,
When the injection nozzle 5 moves in the width direction, its swinging action prevents the inconvenience of the car washing operation being interrupted due to the injection nozzle 5 entering, for example, a gap between wheels. That is, the regulating member 26 comes into contact first with respect to the gap portion into which the injection nozzle 5 may enter, thereby restricting its swinging and preventing the injection nozzle 5 from entering.

Next, the movement of the injection device J in the width direction and its control mechanism will be explained. The arms 14 and 15 that hold each injection device J have one end thereof connected to first guide bars 27 and 28 that extend vertically in parallel along the width direction.
are slidably supported on the respective sides. In this case, the arms are arranged one above the other so as not to collide with each other when moving along the first guide bar.
Further, the arms 14 and 15 are connected to the first guide bar 27,
It is connected to an interlocking chain 29 stretched in parallel to 28 via connectors 30 and 31, respectively.
The interlocking chain 29 includes a pair of floating sprockets 32, which are rotatably disposed on both sides of the truck 6.
33, and arms 14 and 15 are operatively connected to the upper and lower parts of the carriage 6 at positions symmetrical with respect to the center line in the longitudinal direction of the truck 6, respectively. A horizontal plate 34 is installed above the center of the arm from both sides of the truck 6 along its width. A plurality of pin holes 34a are formed at one end of the horizontal plate 34 at appropriate lengths apart.
A regulating pin 35 for regulating the movement of the arm in the width direction is inserted into the pin hole 34a, and by selecting an appropriate pin hole 34a according to the width of the car to be washed and inserting the regulating pin 35, the upper arm 14 The nozzle 5 is configured to come into contact with the nozzle 5 and restrict its movement width, that is, the movement width of the injection nozzle 5. Therefore, as shown in FIGS. 3a and 3b, the upper arm 14 is attached to the carriage 6.
The injection nozzle 5 is in the retreat position when the injection nozzle 5 is located on the side of the
The lower arm 15 moves in conjunction with the lower arm 15 to approach from the other side, and together with this, the injection devices J begin to separate from each other and advance to the outside of the truck 6. Then, when the upper arm 14 comes into contact with the restriction pin 35 and its widthwise advancing movement is stopped, the lower arm 15 also stops at the same time, and each injection device J advances to the maximum and is located at a spaced apart advancing position. Thereafter, after a predetermined period of time, the upper arm 14 is moved in the opposite direction to the original side position, and each injection device J also returns to its original retreat position. During the reciprocating movement of the injection device J in the width direction, the upper and lower arms 14 and 15 are operatively connected to be positioned symmetrically with respect to the center line in the longitudinal direction, so that each injection device J
The tips are also always located symmetrically with respect to the center line in the front-back direction.

The drive mechanism for reciprocating the pair of injection devices J, J, which are interlockably connected as described above, while controlling the desired operation in the width direction, is constructed as follows. In FIG. 2, the above-mentioned connector 30 of the upper arm 14 is also connected to a reversing device R for reversing the moving direction of the upper arm 14 so as to be integrally movable therewith. In the reversing device R, as shown in FIG.
A reversing lever 37, which is biased to rotate in one direction by a coil spring 36, is rotatably mounted on the carriage 38. In this case, the biasing force is
That is, the magnitude of the elastic force of the coil spring 36 is set to be sufficiently larger than the maximum driving force required to move the entire lower washer W guided by the guide rope 1 in the vehicle width direction. be. The reversing lever 37 has a pair of upper and lower engaging portions 37a and 37b formed symmetrically with respect to the center of rotation, and both abut against a stopper 40 via a buffer member 39, respectively, to prevent rotation thereof. Further, in this example, an actuator 41 for operating a limit switch is attached to the tip of the coil spring 36. A second guide bar 42, which is provided parallel to and adjacent to the interlocking chain 29, is slidably inserted into the carriage 38.

Returning to FIG. 2, adjacent to the reversing device R, the first
A drive chain 43 is stretched parallel to the second guide bar 42 between, for example, four sprockets 44. One of the four sprockets 44 is
Drive sprocket 46 by drive chain 45
It is connected to the width direction drive motor 47 via. In this example, the first drive chain 43 is
It is constantly driven at a constant speed in the direction. In the vicinity of the moving path of the first drive chain 43, in this example, the upper arm 14
A toggle switch type limit switch 48 is disposed at a position where it can be engaged with an actuator 41 provided on the reversing device R when the injector J is moved on the side of the truck 6 to position the injection device J in the retracted position.
This limit switch 48 is connected to the traveling drive motor 8 mentioned above. The first drive chain 43 is provided with an engagement pin 49 projecting so as to be able to engage with the reversing lever 37 of the reversing device R.
As the drive chain 43 rotates, it is configured to engage with the upper engaging portion 37a of the reversing lever when rotating upward, and engage with the lower engaging portion 37b when rotating downward. FIG. 5 shows a state in which the engagement pin 49 is engaged with the upper engagement portion 37a of the reversing lever 37.

Here, the operation of moving the above-mentioned injection device J in the width direction and the coordination system between this and the traveling operation of the automobile lower part washer W will be explained based on FIGS. 6a and 6b. Figures 6a and 6b show the second
The injection device J, the reversing lever 37, the engagement pin 49 of the first drive chain 43, and the travel motor 8 shown in the figure
This is a schematic diagram showing an interlocking system between limit switches 48 that drive and control the limit switches 48.
In FIG. 6a, as the chain 43 rotates in the direction of arrow X, the reversing lever 37 engages with the pin 49.
Connector 30, upper arm 14, etc. (see Figure 2)
One of the injectors J, which are movably connected via the injector J, is integrally moved in the same direction to retreat to the retreat position. In this case, the pin 49 engages and attempts to rotate the reversing lever 37 clockwise;
Since the lever 37 is biased counterclockwise by the coil spring 36 with a larger rotational force as described above, its rotation is prevented. Further, the other injection device J also moves in the opposite direction to the arrow X in conjunction with this to retreat to the retreat position. Note that at this time, the travel motor 8 is stopped and the toggle switch 48 is
are located as shown.

Immediately before the injection device J approaches the retreat position with the rotation of the chain 43 and its movement is stopped,
The actuator 41 engages one sensing portion of the toggle switch 48 to operate it, the travel motor 8 is started, and the lower washer W starts traveling. Then, as shown in FIG. 6b, the injection device J is located at the retreat position and its movement is stopped, and the reversing lever 3
7 also stops at the same time, but since the engagement pin 49 tries to move in the same direction as the chain 43 rotates,
The reversing lever 37 is forcibly rotated clockwise against the urging force of the coil spring 36. When the reversing lever 37 rotates to a certain limit,
The engagement between the pin 49 and the lever 37 is released, and the lever 37 is instantaneously returned to its original position by the elastic force of the coil spring 36. Pin 49 and lever 3
7 is disengaged, only the pin 49 rotates together with the chain 43 and reaches the lower path as shown by the arrow X.
Start moving in the Y direction, which is the opposite direction. Then, this time, it engages with the lower engagement portion 37b of the lever 37, which has returned to the engageable position. Since the movement of the injection device J in the Y direction is not restricted, the injection device J starts advancing toward the advancing position along with the movement of the pin 49.

Immediately after the pin 49 starts moving in the Y direction, the actuator 41 then comes into contact with the other sensing part of the toggle switch 48 and returns it to its original position, stopping the drive motor 8 and moving the lower car wash machine. W
stops running. As the chain 43 rotates, the pin 49 moves in the lower path in the Y direction, and the lever 37, upper arm 14, etc. that are engaged with it move together in the same direction, and the pair of injection devices J, J are interlocked. They advance toward the advance position in opposite directions. Then, the upper arm 14 comes into contact with the regulation pin 35 that regulates the maximum movement width of the injection device J according to the width of the vehicle described above, and is prevented from moving.
When the upper arm 14 stops moving, the reversing lever 37 also stops together with it, and the pin 49 is released through an operation similar to the above-described engagement release operation between the pin 49 and the lever 37. After this, pin 49 is chain 4
As the lever 3 rotates, the upper path is reached, and the lever 3 is turned again.
7, the upper arm 14 and the like are moved in the X direction, and the injection device J, which has advanced to the maximum extent and is in the advanced position, starts to move back onto the carriage 6. Note that during this reversal of the movement direction from advance to retreat, the operation of the travel motor 8 is not controlled, and therefore the lower car wash W remains stopped. As described above, in the injection device J, the pin 49 is connected to the chain 43.
The retracting operation of the injection device J is carried out while moving on the upper path of , and the advancing operation is performed during the lower part of the movement. (vehicle length direction). Therefore, only at the advanced position where the robot has advanced to the maximum, its movement is stopped for the reversal operation time from advancing to retreating. By configuring the operation pattern in this way, it is possible to prevent the inconvenience that when the injection device J moves forward in the width direction, it runs and comes into contact with an obstacle such as a wheel, which hinders its running.
Further, since cleaning is performed by stopping specifically for the region corresponding to the tip of the cleaning device J at the advanced position where cleaning is likely to be insufficient, the degree of cleaning can be made uniform throughout.

The cleaning operation performed by the automobile lower part cleaning device configured as described above will be explained below. In FIG. 1, a car M to be washed enters along a guide rope 1 and is stopped at a predetermined position. Stoppers 3 and 4 are placed at appropriate positions depending on the length of the automobile M, and the travel section of the lower washer W is set. Further, the optimum insertion hole for the regulating pin 35 is determined and set according to the width of the automobile M, and the movement range of the injection device J in the width direction is set. After setting the area to be cleaned as described above, the cleaning water valve is opened and the power is turned on to start operation of the lower part washer W from the rear of the automobile M in this example. In the first washing area up to the rear wheel Rw, there is no obstacle that restricts the reciprocating movement of the injection device J in the width direction, so the lower washing machine W is fixed by the above-mentioned restriction pin 35. While periodically repeating an operation in which each injection device J reciprocates once on both sides of the center line in the longitudinal direction of the lower washer W and travels a predetermined distance each time it retreats to the retreat position, Proceed forward along the line. When the lower part washer W starts operating, the swinging operation of the injection nozzle 5 is also started, and the high-pressure washing water is injected almost evenly to the lower part of the automobile M, thereby performing a uniform washing operation.

Eventually, when the lower washer W advances to the area where the rear wheels Rw are opposed, the injection device J is activated by the regulation pin 35.
Since the tips of the injectors come into contact with the rear wheel Rw before they are regulated by the
Perform forward and backward movement between Rw and Rw. usually,
In many cases, the vehicle M enters the guide rope 1 with a deviation and is located diagonally. In such cases, the lower part cleaning device of the present invention can clean the lower part of the vehicle M along the longitudinal center line of the vehicle M as shown below. The longitudinal center line of the washing machine W can be automatically aligned. 7th
As shown in the figure, if the vehicle M is positioned out of alignment, the tip of one of the injection devices J will come into contact with the corresponding one wheel Rw first during the advance movement of the injection device J, so the lower part washer W will not be able to move forward. the other wheel in reaction
Move to Rw side. That is, the biasing force of the coil spring 36 against the reversing lever 37 is the maximum pressing force required to move the lower washer W guided by the guide rope 1 within the allowable width in the direction perpendicular to the guide direction. Since it is set sufficiently larger than , even if the movement of the injection device J is prevented, the engagement between the pin 49 and the lever 37 will not be released.
As the chain 43 is driven, the lower washer W itself moves in the opposite direction as a reaction. When the lower washer W moves to the opposite side with the advance movement of the injection device J, and the other injection device J also comes into contact with the corresponding other wheel Rw (indicated by the two-dot chain line), both injection devices J,
Since the wheels J contact the wheels Rw and Rw, the lower washer W cannot move in the width direction, and the pin 49 forcibly rotates the lever 37 along with the rotation of the chain 43 to release its engagement. In this case, the pair of injection devices J and J are operatively connected so that the amount of advance from the center line CL ₂ in the longitudinal direction of the lower washer W is always equal, so that the tip of each injection device J is Wheel
In the state where they are in contact with Rw, the longitudinal center lines CL ₁ and CL ₂ of the automobile M and the lower washer W are aligned. Also, both injection devices J and J are connected to the wheels respectively.
The reversing operation time from when it comes into contact with the Rw until the start of the evacuation operation is longer than normal, making it possible to thoroughly clean the tire house and its surrounding areas, which are heavily soiled and require the most cleaning, and are effective in cleaning. Contribute to the improvement of

After passing the area where the rear wheels Rw and Rw face each other,
In the area up to the opposing area of front wheels Fw and Fw,
After the cleaning work is carried out within the normal set range, the washing work regulated by the wheels is carried out again in the area, and the normal washing is carried out again in the remaining area, the front detection plate 10 moves to the stopper 4. The running direction is reversed when it comes into contact with . In the above forward travel, the areas that require cleaning shown by diagonal lines are cleaned almost completely. A similar cleaning operation is carried out on the return trip.
The lower part of the automobile M is almost completely cleaned. In this case, even if the car M is positioned diagonally,
At least for the area facing the wheels that requires cleaning the most, the travel trajectory can be automatically corrected to clean the required area.

As described in detail above, according to the present invention, the guide member for guiding the freely movable washing machine W has a predetermined allowable width, and the pair of injection devices move forward and backward in mutually opposite directions along the width direction. By operatively connecting them so that their respective movement widths are equal, the traveling trajectory can be automatically corrected according to the position of the object to be cleaned, and the required area can be accurately and efficiently cleaned. In this case, if the reversing mechanism for moving the injection device in the width direction is configured with a simple mechanical means, it will not only be easy to manufacture, but also prevent failures as much as possible even under the humid conditions in which this device is used. is possible. Moreover, by setting the operation pattern to limit the running of the washer to the time when the injection device is withdrawn, the inconvenience that the running of the washer is obstructed can be prevented. Furthermore,
By adding a swinging mechanism provided with a regulating member to the injection device, a smooth swinging motion can be stably obtained, and the cleaning effect can be further improved. It should be noted that the present invention is not limited to the specific embodiments described above, and it goes without saying that various modifications can be made within the technical scope of the present invention. For example, the guide rope 1 and the driving device may be separated, and the number of injection devices is not limited to one pair, but two or more pairs, or one pair and an appropriate number of injection devices may be combined.

[Brief explanation of drawings]

FIG. 1 is an overall explanatory diagram showing an embodiment of the present invention, FIG. 2 is an overall perspective view of a lower washer W in an embodiment of the present invention, and FIGS. 3a and 3b are FIGS. 4 and 5 are schematic explanatory views showing the retracted position and advanced position of the injection device J, respectively, and FIGS. Figures 6a and 6b are explanatory diagrams showing the reversing mechanism of one embodiment of the present invention, and Figure 7
The figure is an explanatory diagram showing an automatic traveling trajectory correction mechanism according to an embodiment of the present invention. (Explanation of symbols), 1: Guide rope, 5: Injection nozzle, 3, 4: Stopper, 7: Swivel wheel, 2
0: Swing member, 26: Swing regulation member, 29: Interlocking chain, 35: Regulation pin, 37: Reversing lever,
48: Toggle switch.

Claims (1)

[Claims] 1. In a method for washing the lower part of a car by spraying washing water onto the lower part of the car stopped at a predetermined position on the floor surface, a predetermined tolerance with respect to the longitudinal centerline of the car on the same floor surface is provided. A car wash device is made to run movably within a width thereof, and at least a pair of nozzles mounted on the car wash device are movable toward and away from each other in a width direction perpendicular to a longitudinal center line of the car wash device, and the nozzles are movable toward each other in a width direction perpendicular to a longitudinal center line of the car wash device. A method for washing a lower part of an automobile, characterized in that the traveling trajectory of the car washing apparatus is automatically corrected by reciprocating the pair of injection nozzles in a symmetrical manner and restricting movement of the pair of injection nozzles in the width direction from the outside. 2. A truck that can be moved in any direction on the same floor surface as a vehicle stopped at a predetermined position, a guide member that guides the traveling direction of the truck within a predetermined allowable width, and a guide member that is mounted on the truck and each of which is connected to the truck. at least a pair of injection nozzles for injecting cleaning water, which are provided so as to be movable back and forth in a direction perpendicular to the center line in the front-rear direction, and connected to be able to interlock in opposite directions and symmetrically with respect to the center line; An automobile lower part cleaning device comprising: a direction changing means for changing the moving direction in response to stoppage of movement of an injection nozzle; a driving means for driving the injection nozzle; and a traveling means for driving the trolley. . 3 In the above item 2, the direction changing means:
an engaged member that is movable integrally with the injection nozzle and is urged with a predetermined strength via a biasing member; and an engaged member that is connected to the drive means and engages with one end of the engaged member. and an engaging member that moves the injection nozzle, and when the movement of the injection nozzle is prevented and the driving force of the engagement member acting on one end of the engaged member exceeds the urging force, the engagement occurs. An automobile lower part washing device characterized in that, after the engagement is released, the engagement member engages with the other end from the opposite direction to reverse the moving direction of the injection nozzle. 4. The automobile lower part cleaning device according to item 2 above, wherein the guide member is a rope stretched with a predetermined tension. 5. The automobile lower part cleaning device according to any of the above items 2 to 4, wherein the traveling means includes a pulley connected to the driving means so as to be rotatable, and the rope is wound around the pulley. 6 In a method of washing the lower part of a car by spraying washing water onto the lower part of a car that is stopped at a predetermined position on the floor, the lower part of the car can be moved freely on the same floor within a predetermined permissible width with respect to the longitudinal centerline of the car. the car wash apparatus is allowed to run, and at least one pair of nozzles mounted on the car wash apparatus are moved toward and away from each other in a width direction perpendicular to the longitudinal center line of the car wash apparatus and reciprocated symmetrically with respect to the center line. , the movement of the pair of injection nozzles in the width direction is regulated from the outside to automatically correct the travel trajectory of the car wash device, and selectively causes the car wash device to run for a predetermined time when the injection nozzles are closest to each other. 1. A method for cleaning a lower part of an automobile, the method comprising cleaning a required area of the lower part of the automobile. 7. A truck that can be moved in any direction on the same floor surface as a vehicle stopped at a predetermined position, a guide member that guides the traveling direction of the truck within a predetermined allowable width, and a guide member that is mounted on the truck and each of which is connected to the truck. at least a pair of injection nozzles for injecting cleaning water, which are provided so as to be movable back and forth in a direction perpendicular to the center line in the front-rear direction, and connected to be able to interlock in opposite directions and symmetrically with respect to the center line; a direction change means for changing the direction of movement in response to stoppage of movement of the injection nozzle; a travel control means for controlling travel of the truck in response to the operation of the direction change means; and a travel control means responsive to the travel control means. An automobile lower part cleaning device comprising: a traveling means for driving the truck; and a driving means for driving the injection nozzle. 8. A truck that can be moved in any direction on the same floor surface as a vehicle stopped at a predetermined position, a guide member that guides the traveling direction of the truck within a predetermined allowable width, and a guide member that is mounted on the truck and each of which is connected to the truck. at least a pair of injection nozzles for injecting cleaning water, which are provided so as to be movable back and forth in a direction perpendicular to the center line in the front-rear direction, and are connected to be able to interlock in opposite directions and symmetrically with respect to the center line; and the pair of injection nozzles. a direction changing means for changing the moving direction in response to the stop of movement of the nozzle; a travel control means for controlling the travel of the trolley in response to the operation of the direction changing means; and a travel control means responsive to the travel control means. a driving means for driving the bogie, a driving means for driving the injection nozzle, a swinging mechanism for swinging the injection nozzle separately from movement in the width direction, and a swinging mechanism mounted on the injection nozzle so as to be able to operate integrally with the injection nozzle. An automobile lower part cleaning device comprising: a swing regulating member that regulates the swing. 9 In the above item 8, the swing mechanism includes a support shaft extending along the moving direction of the injection nozzle;
a holder for holding the injection nozzle, which is rotatably fitted onto the support shaft and is formed with an engagement leg extending along the support shaft; An automobile lower part cleaning device comprising: a swinging member which is connected to the engaging leg portion via a swinging member and rotates and engages with the engaging foot portion to cause the holding tool to reciprocate around the support shaft.