JP2020097420A - Car washing machine - Google Patents

Abstract

To provide a car washing machine which can avoid car washing errors.SOLUTION: A car washing machine includes: a car washing machine body 1 which moves relative to a washed vehicle CA in a fore and aft direction; side brushes 5, each of which is provided at the car washing machine body 1 and washes a side surface of the washed vehicle CA; rails 26 laterally provided at an upper part of the car washing machine body 1; holding parts 25, each of which supports the side brush 5 so that the side brush 5 can incline in a horizontal direction; driving wheels 27, each of which is pivotally supported by the holding part 25 and rolled on an upper surface of the rail 26 by driving the motor 36; first driven rollers 34, each of which is pivotally supported by the holding part 25, disposed at the inner side of the driving wheel 27, and rolls on the upper surface of the rail 26; second driven rollers 29, each of which is supported by the holding part 25 so as to vertically move, disposed at the outer side of the first driven roller 34, and rolls on a lower surface of the rail 26; and roller biasing parts 32, each of which biases the second driven roller 29 upward.SELECTED DRAWING: Figure 4

Description

The present invention relates to a car washer equipped with a side brush for cleaning the side surface of a vehicle to be cleaned.

A conventional car wash machine is disclosed in Patent Document 1. This car wash machine includes a car wash machine body that moves in the front-rear direction with respect to the vehicle to be cleaned. The car wash main body has two left and right opposing stand portions and a ceiling portion connecting the upper ends of the stand portions, and is formed in a gate shape that straddles the vehicle to be washed.

The car wash main body is provided with a pair of left and right side brushes for cleaning the side surface of the vehicle to be cleaned. The side brush has a rotating shaft arranged in the vertical direction, and is supported by a holding portion so as to be tiltable in the left and right directions. The holding part moves on a rail horizontally provided on the upper part of the car wash machine body.

The holding unit is provided with a rotary motor, a moving motor, drive wheels, a second driven roller and a first driven roller. The side brush rotates by driving the rotary motor. The drive wheels are axially supported by the holding portion and are arranged outside the center of inclination of the side brushes, and roll on the upper surface of the rail by the drive of the moving motor.

The second driven roller is axially supported by the holding portion and is arranged inside and outside the inclination center of the side brush,
Roll the underside of the rail. The first driven roller is axially supported by the holding portion and is arranged inside the inclination center of the side brush, and rolls on the upper surface of the rail. Further, a brush urging portion that connects the holding portion and the side brush and urges the side brush in a direction of pressing the side brush against the side surface of the vehicle to be cleaned is provided.

In the car washer having the above structure, the car washer body is moved in the front-rear direction to start car washing. The side brush moves in the left-right direction by the drive of the moving motor while rotating by the drive of the rotating motor. When the side brush comes into contact with the side surface of the vehicle to be cleaned, the side brush is inclined against the biasing force of the brush biasing portion and is pressed against the vehicle to be cleaned. When the side brushes are arranged at a predetermined tilt angle, the car wash machine body moves and the side surface of the vehicle to be cleaned is cleaned.

Further, when the side brush is tilted to the tilt limit, the stopper provided on the side brush comes into contact with a predetermined position of the holding portion, and the side brush and the holding portion are weighted in the tilting direction. For this reason, the drag force applied from the rail to the drive wheels arranged outside the inclination center of the side brush is reduced, and the drive wheels run idle. Accordingly, the side brush pressed by the vehicle to be cleaned can be retracted from the vehicle to be cleaned by the rolling of the first and first driven rollers.

Japanese Patent Laid-Open No. 2005-7980

However, according to the above-mentioned conventional car wash machine, when the drive wheel is worn due to long-term use, the gap between the second driven roller and the rail becomes large. At this time, when the side brush comes into contact with the vehicle to be cleaned and tilts, the holding portion may tilt and the drive wheel may idle until the second driven roller contacts the rail. In particular, in a vehicle to be cleaned having a large vehicle height such as a wagon vehicle, the left and right ends of the ceiling surface come into contact with high positions of the side brushes. For this reason, the side brush is unlikely to incline with respect to the holding portion against the urging force of the brush urging portion, and is inclined integrally with the holding portion. As a result, the side brush cannot be tilted to a predetermined tilt angle, resulting in an operation error of the car wash machine.

It is an object of the present invention to provide a car wash machine capable of preventing an operation error of the car wash machine.

In order to achieve the above object, the present invention provides a car wash main body that moves relative to the vehicle to be washed forward and backward, a side brush provided on the car wash main body to wash a side surface of the vehicle to be washed, and the car wash. A rail laterally provided on the upper part of the main body, a holding portion that supports the side brush so as to be tiltable in the left-right direction, and a drive wheel that is pivotally supported by the holding portion and rolls on the upper surface of the rail by driving a motor. A first driven roller that is axially supported by the holding portion, is arranged inside the drive wheel, and rolls on the upper surface of the rail, and the first driven roller that is supported by the holding portion so as to be vertically movable. A second driven roller which is arranged further outside than the rail and rolls on the lower surface of the rail, and a roller urging portion which urges the second driven roller upward.

Further, in the car wash machine of the present invention according to the present invention, a brush urging portion that connects the holding portion and the side brush and urges the side brush toward a vehicle to be washed is provided in the holding portion. It is a feature.

Further, the present invention is characterized in that, in the car wash machine having the above-mentioned structure, the second driven roller is arranged between the drive wheel and the first driven roller in the left-right direction.

Further, according to the present invention, in the car washer having the above-mentioned configuration, the drive wheel and the second driven roller are arranged outside and the first driven roller is arranged inside with respect to an inclination center of the side brush. And

Further, the present invention is, in the car washer having the above structure, a facing wall facing the front and rear of the holding portion, a vertically extending long hole opening in the facing wall, the shaft inserted into the long hole, and the long length. A bottom wall connecting the front and rear facing walls below the hole, the second driven roller is supported by a shaft via a bearing, and the roller urging portion is disposed between the shaft and the bottom wall. And a compression spring.

Further, in the car wash machine of the present invention according to the present invention, a bolt which is screwed into the bottom wall and through which the compression spring is inserted, and a bolt which is screwed into the bolt and is arranged between the compression spring and the bottom wall are disposed. It is equipped with an adjusting screw.

According to the present invention, the holding portion that tiltably supports the side brush has the drive wheel, the first driven roller, and the second driven roller. The drive wheel and the first driven roller roll on the upper surface of the rail, and the first driven roller is arranged inside the drive wheel. The second driven roller rolls on the lower surface of the rail, is arranged outside the first driven roller, and is biased upward by the roller biasing portion.

As a result, even if the drive wheel wears, the second driven roller and the drive wheel are pressed against the rail by the bias of the roller biasing portion. For this reason, the side brushes that prevent the drive wheels from idling and come into contact with the vehicle to be cleaned are arranged at a predetermined inclination angle, and an operation error of the car wash machine can be prevented. When the side brush is tilted to the tilt limit, the holding part tilts with the first driven roller as a fulcrum against the biasing force of the roller biasing part. Therefore, the drive wheel can idle to retract the side brush, and damage to the vehicle to be cleaned and the side brush can be prevented.

A side view showing a car wash machine according to an embodiment of the present invention. Front view showing a car wash machine according to an embodiment of the present invention Schematic front view of the sidelash and the holding portion of the car wash machine according to the embodiment of the present invention Front sectional view showing a holding portion of a car wash machine according to an embodiment of the present invention Side sectional view showing a holding portion of a car wash machine according to an embodiment of the present invention

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a side view and a front view showing a car washing machine WA according to an embodiment of the present invention. The car wash machine WA includes a remote panel 7 and a car wash machine body 1.

The remote panel 7 is arranged along the traveling path R of the vehicle CA to be cleaned. The vehicle to be washed CA stops in front of the remote panel 7, and the user sets the vehicle washing conditions by operating the remote panel 7 from within the vehicle to be washed CA.

With the buttons provided on the remote panel 7, it is possible to set car wash conditions using liquid agents such as shampoo, waxing, and water repellent coat. Further, the remote panel 7 can be used to set equipment such as a front guard, a fender pole, a side mirror, a rear wiper, and a roof carrier.

The car washer body 1 is formed in a gate shape having two left and right stand portions 90 and a ceiling portion 91 connecting the upper ends of the stand portions 90.

A pair of left and right traveling rails 2 are laid on the ground G, and main body wheels 3 provided on the bottom surface of the stand portion 90 are arranged on the traveling rail 2. As a result, the car wash machine body 1 stands on the traveling rail 2, travels on the traveling rail 2 by the drive of a traveling motor (not shown), and moves forward and backward with respect to the vehicle to be cleaned CA.

The stand portion 90 is provided with a tank storage portion 17 that stores a plurality of liquid storage tanks (not shown) that store various liquid agents such as detergent and wax. A distribution pipe section 18 for distributing the liquid agent from each liquid storage tank is provided above the tank storage section 17. In the distribution pipe section 18, a first water purifying nozzle 11, a second water purifying nozzle 13, a first detergent nozzle 12, a second detergent nozzle 15, a water repellent coating nozzle 14, and a wax nozzle 16 each of which is an injection nozzle are electromagnetic valves (not shown). ) Is derived.

The first water purification nozzle 11 and the second water purification nozzle 13 are respectively arranged on the inlet face 1a side and the outlet face 1b side of the car wash machine body 1, and injects cleaning water to the vehicle to be cleaned CA. The first detergent nozzle 12 and the second detergent nozzle 15 are arranged on the inlet surface 1a side and the outlet surface 1b side of the car wash main body 1, respectively, and spray the detergent onto the vehicle to be cleaned CA. The water-repellent coat nozzle 14 and the wax nozzle 16 are arranged on the exit surface 1b side of the car wash main body 1. The water-repellent coat nozzle 14 sprays the liquid of the water-repellent coat agent onto the vehicle CA to be cleaned. The wax nozzle 16 injects liquid wax onto the vehicle CA to be cleaned.

An operation panel 8 is arranged on the front surface of one stand portion 90 of the car wash machine body 1. The operation panel 8 has operation buttons (not shown) similar to those of the remote panel 7 for setting car wash conditions. A vehicle shape sensor 9 is provided on the front surface of the stand portion 90. The vehicle shape sensor 9 includes a photoelectric sensor, an ultrasonic sensor, and the like, and detects the vehicle length and the outer surface shape of the vehicle to be cleaned CA that enters the car wash machine body 1.

The car wash main body 1 is provided with a blower 20 that generates an air flow to dry the vehicle CA to be cleaned. A side blower nozzle 22 and a top blower nozzle 21 are connected to the blower 20. The side blowing nozzles 22 are provided on both the stand portions 90, and blow the air toward the side surface of the vehicle to be cleaned CA. The top blowing nozzle 21 is provided on the ceiling portion 91 and blows air toward the upper surface of the vehicle CA to be cleaned.

The car wash main body 1 is provided with a plurality of rotating brushes composed of a rocker brush 6, a top brush 4 and a side brush 5 which slide on the vehicle CA to be cleaned and brushes. A pair of rocker brushes 6 is provided on the left and right to clean the lower portions of both side surfaces of the vehicle CA to be cleaned. The top brush 4 is installed laterally on the ceiling portion 91 and cleans the upper surface of the vehicle CA to be cleaned. A pair of left and right side brushes 5 are provided to clean the side surface and the rear surface of the vehicle CA to be cleaned.

FIG. 3 shows a schematic front view of the side brush 5. A rail 26 is laterally provided on a ceiling portion 91 arranged above the car wash machine body 1. The rail 26 is provided with a pair of left and right holding portions 25. The holding portion 25 holds the side brush 5 having the rotating shaft 5a arranged in the vertical direction. The side brush 5 is supported by the holding portion 25 so as to be tiltable in the left-right direction.

4 and 5 show a front view and a side sectional view of the left holding portion 25. The holding portion 25 on the right side is configured symmetrically with the holding portion 25 on the left side. In FIG. 4, the right side shows the inside of the car wash machine body 1, and the left side shows the outside of the car wash machine body 1.

The holding portion 25 is formed of a plurality of metal plates, and surrounds the front and rear surfaces and the upper and lower surfaces of the rail 26 by a pair of facing walls 25a, a top wall 25d, and a bottom wall 25c that face each other in the front and rear. Front facing wall 25a
A shaft support portion 24 that supports the side brush 5 is provided on the top.

The rotary shaft 5a of the side brush 5 is inserted into a hollow rod 5b having a rectangular horizontal cross section, and is rotatably supported by a bearing (not shown) arranged in the rod 5b. The rotary shaft 5a penetrates a flange 5c arranged at the upper end of the rod 5b and is connected to a rotary motor 36 attached to the flange 5c via a chain 23. By driving the rotation motor 36, the side brush 5 rotates about a rotation shaft 5a extending vertically.

Further, a shaft portion 5d is provided on the front and rear surfaces of the rod 5b. A bearing 24a fitted to the shaft portion 5d is provided on the shaft support portion 24, and the side brush 5 is supported so as to be tiltable at a tilt center 5e. When the flange 5c comes into contact with the upper wall 25d of the holding portion 25 due to the inclination of the side brush 5, the side brush 5 reaches the inclination limit and cannot be inclined with respect to the holding portion 25.

An inclination sensor 39 is provided above the shaft support 24 and outside the inclination center 5e. The inclination sensor 39 monitors the side surface of the rod 5b and detects the inclination angle of the side brush 5. The side brush 5 is arranged at a predetermined inclination angle (angle smaller than the inclination limit) to wash the vehicle CA to be washed.

Further, the holding portion 25 includes a drive wheel 27 rolling on the rail 26, a driven roller 34 (first driven roller), a driven roller 29 (second driven roller), a driven roller 30, a driven roller 28, and a driven roller 38. It is provided.

The drive wheel 27 is axially supported horizontally by the holding portion 25 so as to be horizontal, and is disposed outside the inclination center 5e of the side brush 5. The drive wheel 27 rolls on the upper surface 26 a of the rail 26 by driving a moving motor 35 attached to the holding portion 25. The upper surface 26a and the lower surface 26b of the rail 26 are formed with inclined surfaces at the front and rear ends, and the peripheral surface of the drive wheel 27 is formed in a V shape along the front and rear inclined surfaces of the upper surface 26a. As a result, the drive wheels 27 can roll stably on the upper surface 26a of the rail 26.

The driven roller 34 (first driven roller) is axially supported by the holding portion 25 with the axial direction inclined with respect to the horizontal direction, and a pair of front and rear is provided along the front and rear inclined surfaces of the upper surface 26a. As a result, the driven roller 34 rolls on the upper surface 26a of the rail 26. Further, the driven roller 34 is arranged inside the drive wheel 27, and the inclination center 5 e of the side brush 5 is arranged between the driven roller 34 and the drive wheel 27.

The driven roller 29 (second driven roller) and the driven roller 30 are axially supported horizontally by the holding portion 25 and roll on the lower surface 26b of the rail 26. The driven roller 29 is arranged outside and the driven roller 30 is arranged inside of the inclined center 5e of the side brush 5. Further, the driven roller 29 and the driven roller 30 are arranged inside the driving wheel 27 and outside the driven roller 34.

The driven roller 28 and the driven roller 38 are axially supported vertically by the holding portion 25 and roll on the side surface 26c of the rail 26. Further, the driven roller 28 and the driven roller 38 are arranged directly above the driven roller 29 and the driven roller 30, respectively.

Below the driven roller 30, a brush urging portion 37 including a tension spring that connects the holding portion 25 and the rod 5b is provided. The brush urging portion 37 is arranged horizontally in the expansion/contraction direction, and urges the side brush 5 toward the vehicle CA to be cleaned.

The driven roller 29 holds a bearing 29b on its inner peripheral portion, and a shaft 29a extending in the front-rear direction is fitted into the bearing 29b. The shaft 29a is inserted into vertically extending elongated holes 25a provided in a facing wall 25b facing the front and rear of the holding portion 25, and bolts 29c are screwed at both ends to prevent the shaft 29a from coming off. As a result, the driven roller 29 is arranged so as to be movable in the vertical direction.

Further, between the shaft 29a and the bottom wall 25c of the holding portion 25, a pair of front and rear roller urging portions 32 for urging the driven roller 29 upward via the shaft 29a are provided. The roller urging portion 32 is composed of a compression spring, is inserted into a bolt 31 screwed to the bottom wall 25c, and is adjusted to a predetermined urging force by an adjusting screw 33 formed of a double nut screwed to the bolt 31. An annular groove or a protrusion that locks the roller biasing portion 32 may be provided on the peripheral surface of the shaft 29a. As a result, it is possible to prevent the roller biasing portion 32 from being displaced.

In the car washer WA having the above configuration, a predetermined car wash setting is performed from the remote panel 7, and the vehicle to be cleaned CA is stopped at a predetermined position. After that, the car wash main body 1 moves toward the rear of the vehicle CA to be cleaned, and the side brush 5, the rocker brush 6, and the top brush 4 clean the vehicle CA to be cleaned.

The side brushes 5 are moved by the movement motor 35 in a direction in which they approach each other in the left-right direction. When the side brush 5 comes into contact with the side surface of the vehicle CA to be cleaned, the rod 5b tilts against the urging force of the brush urging portion 37. At this time, the driven roller 29 and the drive wheel 27 press the rail 26 by the urging of the roller urging portion 32, so that the drive wheel 27 is prevented from idling.

Even if the drive wheels 27 wear due to the use of the car washer WA over the years, the roller urging portion 32 urges the driven rollers 29 to prevent the drive wheels 27 from idling in the same manner as described above.

When the inclination sensor 39 detects that the side brush 5 is arranged at a predetermined inclination angle, the lateral movement of the side brush 5 is stopped. Then, the car wash machine body 1 moves in the front-rear direction, and the side brush 5 cleans the side surface of the vehicle CA to be cleaned. At this time, the drive wheel 27 is driven by the inclination sensor 39 so as to maintain the inclination angle of the side brush 5 constant.

Further, the side brush 5 may reach the tilt limit when the vehicle width of the vehicle to be cleaned CA is suddenly increased or when the tilt sensor 39 is erroneously detected. When the side brush 5 at the tilt limit is further pressed by the vehicle CA to be cleaned, the holding portion 25 tilts together with the side brush 5 around the lower end of the driven roller 34. As a result, the drive wheel 27 is lifted against the urging force of the roller urging portion 32 and idles, and the side brush 5 retreats from the vehicle CA to be cleaned. Therefore, excessive pressing by the side brush 5 can be prevented, and damage to the vehicle to be cleaned CA and the side brush 5 can be prevented.

Following the cleaning by the rotating brush, the top washing nozzle 21 and the side blowing nozzle 22 start drying the vehicle to be washed CA while the car wash machine body 1 moves in the front-rear direction. At this time, the top blowing nozzle 21 moves up and down based on the detection result of the vehicle shape sensor 9 to dry the upper surface of the vehicle CA to be cleaned.

According to this embodiment, the holding portion 25 that tiltably supports the side brush 5 includes the drive wheel 27, the driven roller 34 (first driven roller), and the driven roller 29 (second driven roller). The drive wheel 27 and the driven roller 34 roll on the upper surface of the rail 26, and the driven roller 34 is arranged inside the drive wheel 27. The driven roller 29 rolls on the lower surface of the rail 26, is arranged outside the driven roller 34, and is biased upward by the roller biasing portion 32.

As a result, even if the drive wheels 27 wear, the driven roller 2 is urged by the urging force of the roller urging portion 32.
9 and the drive wheel 27 are pressed against the rail 26. Therefore, the drive wheel 27 is prevented from idling and the side brush 5 that comes into contact with the vehicle to be cleaned CA is arranged at a predetermined inclination angle, and an operation error of the car washer WA can be prevented. When the side brush 5 is tilted to the tilt limit, the holding portion 25 tilts with the driven roller 30 as a fulcrum against the biasing force of the roller biasing portion 32. Therefore, the drive wheel 27 idles and the side brush 5 can be retracted, and damage to the vehicle to be cleaned CA and the side brush 5 can be prevented.

Further, a brush urging portion 37 that urges the side brush 5 in the direction of the vehicle CA to be cleaned is provided in the holding portion 25. As a result, the side brush 5 presses the vehicle to be cleaned CA and the cleaning power can be improved. Further, even if the holding portion 25 is weighted in the inclination direction when the side brush 5 inclines against the brush urging portion 37, the drive wheel 27 can be prevented from idling by the urging of the roller urging portion 32. it can.

Even when the brush urging portion 37 is provided, if the frictional force between the shaft portion 5d of the rod 5b and the bearing 24a is large, the side brush 5 is inclined against the frictional force. The holding portion 25 is weighted in the tilt direction. In this case as well, the drive wheel 27 can be prevented from idling by the biasing of the roller biasing portion 32.

A driven roller 29 is arranged between the drive wheel 27 and the driven roller 34 in the left-right direction. As a result, the drive wheel 27 and the driven roller 34 are pressed against the rail 26 by the urging of the roller urging unit 32, and the holding unit 25 can be stably run. The driven roller 29 may be arranged outside the drive wheel 27.

Further, the drive wheel 27 and the driven roller 29 are arranged on the outer side and the driven roller 34 is arranged on the inner side with respect to the inclination center 5e of the side brush 5. As a result, the own weight of the side brush 5 is applied between the drive wheel 27 and the driven roller 34. Further, the driven roller 29 is brought closer to the drive wheel 27 in the left-right direction, and the urging force of the roller urging portion 32 for pressing the drive wheel 27 against the rail 26 can be reduced. Therefore, the holding portion 25 can be more stably run.

The driven roller 29 may be arranged inside the inclined center 5e of the side brush 5, or the driven roller 29 and the driven roller 30 may be arranged outside the inclined center 5e. From the viewpoint of space saving and stability of traveling of the holding portion 25, it is preferable that the driven roller 29 is arranged outside and the driven roller 30 is arranged inside of the inclined center 5e.

In addition, the shaft 29a of the driven roller 29 is inserted through the elongated hole 25a provided in the facing wall 25b of the holding portion 25, and the roller urging portion 32 is formed by the compression spring arranged between the shaft 29a and the bottom wall 25c. .. Accordingly, the roller urging portion 32 that urges the driven roller 29 upward can be easily realized.

Further, the bolt 31 into which the compression spring forming the roller biasing portion 32 is inserted is screwed into the bottom wall 25c, and the adjusting screw 33 is arranged between the compression spring and the bottom wall 25c. Thereby, the urging force of the roller urging unit 32 can be easily adjusted.

In the present embodiment, the roller urging portion 32 is provided on the driven roller 29, but may be provided on the driven roller 30 disposed outside the driven roller 34, or may be provided on both the driven roller 29 and the driven roller 30. Good. Further, the roller urging portion 32 may be configured by a small air cylinder instead of the compression spring.

INDUSTRIAL APPLICABILITY According to the present invention, the present invention can be applied to a car washer equipped with a side brush for cleaning the side surface of a vehicle to be cleaned.

1 Car Wash Machine Main Body 2 Running Rail 3 Main Body Wheel 4 Top Brush 5 Side Brush 5a Rotating Shaft 5b Rod 5c Flange 5d Shaft 5e Inclination Center 6 Rocker Brush 7 Remote Panel 8 Operation Panel 9 Vehicle Shape Sensor 20 Blower 21 Top Blower Nozzle 22 Side Blower nozzle 23 Chain 24 Shaft support 24a Bearing 25 Holding part 25a Long hole 25a Opposing wall 25b Opposing wall 25c Bottom wall 25d Top wall 26 Rail 26a Upper surface 26b Lower surface 26c Side 27 Drive wheel 28 Driven roller 29 Driven roller (2nd driven roller)
29a Shaft 29b Bearing 29c Bolt 30 Driven roller 31 Bolt 32 Roller biasing portion 33 Adjustment screw 34 Driven roller (first driven roller)
35 Moving Motor 36 Rotating Motor 37 Brush Energizing Part 38 Driven Roller 39 Inclination Sensor 90 Stand Part 91 Ceiling Part CA Washing Vehicle WA Car Washing Machine

Claims (6)

A car wash main body that moves relative to the vehicle to be washed back and forth, a side brush provided on the car wash main body to wash a side surface of the vehicle to be washed, and a rail horizontally provided on an upper portion of the car wash main body, A holding portion that supports the side brush so as to be tiltable in the left-right direction, a drive wheel that is pivotally supported by the holding portion and rolls on the upper surface of the rail by driving a motor, and a drive wheel that is pivotally supported by the holding portion A first driven roller which is arranged inside the wheel and rolls on the upper surface of the rail, and a first driven roller which is supported by the holding portion so as to be vertically movable and is arranged outside the first driven roller and which is arranged on the rail. A car wash machine comprising: a second driven roller that rolls on a lower surface; and a roller urging portion that urges the second driven roller upward. The car washing machine according to claim 1, further comprising a brush urging portion that connects the holding portion and the side brush and urges the side brush toward a vehicle to be cleaned. The car wash machine according to claim 1 or 2, wherein the second driven roller is disposed between the drive wheel and the first driven roller in the left-right direction. 4. The car wash machine according to claim 3, wherein the drive wheel and the second driven roller are arranged on the outer side and the first driven roller is arranged on the inner side with respect to the center of inclination of the side brush. Opposing walls facing the front and rear of the holding portion, vertically extending elongated holes opening in the opposing wall, a shaft inserted into the elongated holes, and a bottom connecting the front and rear opposing walls below the elongated holes. With a wall,
The second driven roller is supported by the shaft via a bearing, and the roller urging portion is composed of a compression spring arranged between the shaft and the bottom wall. The car washing machine according to any one of 4 above. It is characterized by including a bolt that is screwed into the bottom wall and through which the compression spring is inserted, and an adjusting screw that is screwed into the bolt and is disposed between the compression spring and the bottom wall. The car wash machine according to claim 5.

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