JPS633800B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a brush pressing device in a rotary brush cleaning machine for cleaning the outer surface of an aircraft or the like, particularly the lower surface of an aircraft body that is difficult to clean. Conventionally, in the configuration of a rotary brush washer, which is often used for cleaning the side of a car body, both ends of the rotating shaft of a cylindrical rotary brush are held by bearings at the tip of a brush arm, and the base of the brush arm is The rotating brush is pivotably supported on the base of the washing machine so as to be swingable, and a certain torque is applied to the brush arm in a direction to bring the rotating brush closer to the surface to be cleaned, thereby applying a certain pressing pressure to the rotating brush. A method was adopted in which the cleaning material was rubbed onto the surface to be cleaned. However, in the cleaning operation of a washer that uses such a brush pressing method, the direction of movement of the washer for continuous cleaning is almost parallel to the direction in which the surface to be cleaned is extended, as when washing the side of a car body with water. In this case, the distance between the surface to be cleaned and the cleaning machine does not change, so the swinging position of the brush arm does not change significantly, and therefore the rotating brush is not biased by the brush arm. is carried out smoothly. However, when attempting to clean curved surfaces such as the outer surface of an aircraft body, especially the underside of an aircraft that is difficult to clean, the distance between the surface to be cleaned and the cleaning machine changes significantly during the cleaning process. Therefore, it is unavoidable that the swinging position of the brush arm changes greatly as a result, and as a result, it becomes difficult to apply constant pressure, and the protruding members of the brush arm may hit the surface to be cleaned and damage the surface. Problems such as risks arise. The present invention allows a small portion of the variation in the spacing between the surface to be cleaned and the cleaning machine to be absorbed by the swinging of the brush arm, and most of the variation is absorbed by the corresponding movement of the brush arm pivot. It is an object of the present invention to solve the above-mentioned problems by absorbing the cylindrical rotating brush against the lower surface of the object to be cleaned. An object of the present invention is to provide a brush pressing device for a rotating brush type washing machine. The present invention will be described below based on an illustrated embodiment. As shown in FIGS. 1 to 4, the washing machine equipped with the brush pressing device of the embodiment has a trolley 2 with running wheels 1 attached to its four corners, and a power drive means 3 consisting of a pantograph mechanism. A lifting platform 4 as a movable part stacked on the trolley 2 and the lifting platform 4
It is formed by a brush mechanism 5 mounted on the rear half of the platform, that is, the left half in FIG. 1, and a detergent tank 6 and an instrument panel 7 installed on the front half of the platform 4. In the description, the right side and the left side in FIG. 1 are referred to as the front and the rear, respectively, and the near side and the back side in the same figure are referred to as the right side and the left side, respectively. Here, the formation mode of each of the above-mentioned constituent parts will be specifically described. (a) Trolley 2 At the front end of the trolley 2, a hand handle 8 made of a handrail frame-shaped pipe is erected, and the trolley 2 can be moved directly or by remote control by input or power. ,and,
When carrying out cleaning work, the trolley 2 is moved forward at an appropriate cleaning speed by pulling and operating the handle 8 for continuous cleaning.
Slow down. (b) Power Drive Means 3 This means 3 is equipped with a hydraulic cylinder 9 as an elevating drive mechanism, and the base of the cylinder 9 is pivotally supported on the trolley 2. (c) Brush mechanism 5 Near the center of the rear end of the lifting platform 4, a pair of angle-shaped support racks 10 facing each other in the front and back are fixedly installed, and a bearing 11 is attached to the upper surface of each support rack 10, respectively. In addition, the same bearing 11 is provided with a support beam 12 (hereinafter referred to as support beam 1) for adjusting left and right inclination.
It is abbreviated as 2. ) Both ends of an adjusting shaft 13 suspended horizontally on the lower surface of the intermediate base of the adjusting shaft 13 are supported, and a passive sprocket 14 is attached to the front end of the adjusting shaft 13. On the other hand, a gear box 15 for input or power drive is installed at the left end of the rear part of the lifting platform 4, and a drive wheel 16 is attached to the operating rotation shaft of the box 15, and a drive wheel 16 is attached to the output shaft of the box 15. The transmission sprocket 17 is shaft-mounted,
A chain 18 is wound between the sprocket 17 and the passive sprocket 14. With this structure, by operating and rotating the drive wheel 16, it is possible to easily adjust and set the horizontal inclination of the support beam 12 within an inclination range of about 30 degrees left and right. Next, at both left and right ends of the support beam 12,
A bearing 19 is attached to each bearing, and the same bearing 1
9 has bearings on both ends of an arm shaft 20 for adjusting the elevation angle, and furthermore, a pair of symmetrical brush arms 2 are mounted near the left and right ends of the arm shaft 20.
The intermediate base portions 1 and 22 are pivoted and prevented from rotating. A balance weight 23 is clamped to the tip of the straight front half portions 21a, 22a of each brush arm 21, 22, and the rear half 21b extends laterally and is bent into an L shape. , 22b, both ends of a rotating shaft 25 of a cylindrical rotating brush 24 (hereinafter abbreviated as rotating brush 24) are supported, and the rear half 2 of each brush arm
A rotating brush 24 is provided at the base of 1b and 22b.
The front peripheral surface of the brush cover 26 surrounding the lower half of the brush cover 26 is welded. Upright brushes 27 are planted in the shape of a square frame around the four peripheries of the upper opening of the brush cover 26, and the height of the tip of the upright brush 27 is slightly lower than the top edge of the rotating brush 24. , at the front and rear ends of the brush cover 26,
A water pipe 28 with upward water nozzles 28a and 29a opened at multiple locations (3 locations) along the way,
29 is stretched, and a brush motor 30 is attached to the right side of the front end of the brush cover 26. A chain 33 is connected between the passive sprocket 31 at the right end of the brush rotation shaft 25 and the transmission sprocket 32 at the output shaft of the brush motor 30.
is hung around, and each water pipe 2
The open ends on one side of 8 and 29 are connected to a water supply hose 34 led from external piping. Due to this structure, the rotating brush 24 and the brush cover 26 move up and down together as the brush arms 21 and 22 swing in the vertical direction.
A biasing means 36 consisting of an electric torque motor is operatively connected to the left end of the elevation adjustment arm shaft 20, in which the swing bases of both the brush arms 21 and 22 are prevented from rotating, via transmission means 35, 37, and 38. There is. As a result, the brush arm 2 is installed on the support beam 12 and is tiltable in the left and right direction.
1 and 22 are always rotated clockwise in FIG. 1, that is, in a direction that raises the rotating brush 24, with a constant torque. That is, the biasing means 36
Even when the support beam 12 is tilted in the horizontal direction, the driving force of the brush arms 21, 22
The brush arms 21 and 22 are urged upward by the elevation angle adjusting arm shaft 20 provided with the brush arms 21 and 22. In order to always transmit the driving force of the biasing means 36 to the elevation adjustment arm shaft 20, the transmission means 35 is designed such that torque transmission can be maintained even when the driving shaft and the driven shaft are not parallel to each other.
37 and 38 may be used, or the biasing means 36 itself may be fixed to the support beam 12 and the biasing means 36 may be
and the arm shaft 20 for adjusting the elevation angle may be directly interlocked and connected. In addition, the above-mentioned elevation angle adjustment arm shaft 20
A fan-shaped cam plate 44 for detecting the swinging position, that is, the elevation angle, of the brush arms 21 and 22 is pivoted and fixed at one location, and a fan-shaped cam plate 44 for detecting the vertical swing angle is attached to the cam circumference of the cam plate 44. The operating pins of the upper and lower limit switches LS1 and LS2, which are attached to a stationary part, are in contact with each other as a detection means. Therefore, a stepped portion 44a having a large diameter is formed on the cam circumference of the cam plate 44, and the elevation angle is 0° to 0°.
In the range of θ ₂ (for example 10°), both switches LS1,
Both LS2 have come off the step 44a and are in the OFF state, and when the elevation angle is in the range of θ ₂ to θ ₁ (for example, 30°), only switch LS2 is pushed by the step 44a and is in the ON state. , when the elevation angle exceeds θ ₁ , both switches LS1 and LS2 close to the stepped portion 44.
It is pushed by a and turns on. (d) Detergent Tank 6 The tank 6 contains an aqueous solution of a cleaning agent, that is, the cleaning liquid, and an electric pump 39 for the cleaning liquid is installed on the top surface of the tank 6 . The suction pipe 40 of the pump 39 is submerged in the tank 6, and the discharge pipe 41 of the pump 39 is connected to a liquid pipe 42, which will be described later. (e) Instrumentation panel 7 An external commercial power source is supplied to this panel 7 via a floating cable (not shown), and a brush motor 30, a torque motor 36, and a hydraulic pump (described later) are installed in the panel 7. An energizing circuit for the motor and its control circuit are built in, and a control command operation mechanism is attached. In addition, a liquid passage pipe 42 is horizontally mounted on a bracket 43 fixed to the rear surface of the instrumentation panel 7.
Cleaning agent nozzles 42a are opened upward at a plurality of locations (three locations) on the supported pipe 42. (f) Others Although not shown, the following hydraulic system members shown in the hydraulic piping diagram in FIG. There is. Pump Drive Motor M, Hydraulic Pump P, Solenoid Valve V Next, the operation and operation of the washing machine configured as described above will be explained. This washing machine is used to wash the bottom of the fuselage and the bottom of the wings of an airplane driven on the ground. For example, as shown in Fig. 1,
In the process of moving the cleaning machine across the lower part of the body W as the object to be cleaned, the top circumference of the rotating brush 24 is used to perform rubbing cleaning. The swingable range of the brush arms 21 and 22 is limited to an elevation angle of 0° (horizontal) to 35° by the impact action of a stopper member of a mechanical structure (not shown). By the way, to start the cleaning work, first, the brush motor 30 is energized to start rotating the rotary brush 24, and the cleaning liquid pump 39 is started.
By starting the external water supply, each cleaning agent nozzle 42a
The cleaning liquid and cleaning water are sprayed from each of the water nozzles 28a and 29a. In addition, when the rotating brush 24 is inclined with respect to the lower surface of the body W, that is, the surface to be cleaned, the inclination of the axis of the rotating brush 24 is adjusted by operating the hand wheel 16,
The rotating brush 24 is set so as to uniformly contact the surface to be cleaned. Thereafter, after energizing the biasing means 36, the handle 8
is pulled to move the trolley 2 quietly in the forward direction, but the brush arms 21 and 22 are driven by the urging means 36 and urged to rotate clockwise in FIG. The rotating brush 24 is pressed against the surface to be cleaned with a constant torque. As shown in the operation table in Figure 6, if the elevation angle of the brush arms 21, 22 exceeds the upper limit angle θ ₁ (30°) due to the height of the surface to be cleaned, the limit switch LS
1 is turned on and hydraulic pressure is sent to the cylinder 9, which causes the lifting platform 4 to rise and reduce the angle of elevation, and when it returns to the upper limit angle θ ₁ , the lifting platform 4 is stopped and held. In addition, as the surface to be cleaned becomes lower, the elevation angle becomes the lower limit angle θ ₂
(10°), limit switch LS2
OFF, the solenoid valve opens, and the lifting platform 4 descends due to pressure relief from the cylinder 9. As a result, the elevation angle increases, and when it returns to the lower limit angle θ ₂ , the solenoid valve V is disconnected. The hydraulic pressure is held and the lifting platform 4 stands still. In this way, the rotating brush 24 has the elevation angles of the brush arms 21 and 22 within the range of θ ₁ to _{θ 2} .
It is always pressed against the surface to be cleaned with a constant biasing torque of the biasing means 36 consisting of a torque motor. Therefore, the cleaning liquid applied to the surface to be cleaned by spraying from the cleaning agent nozzle 42a is transferred to the rotating brush 24.
During the elapsed time until the arrival of the washing water, the adhering dirt is sufficiently removed, and therefore, the dirt is efficiently wiped off together with the cleaning water by the wiping action of the rotating brush 24. The above cam plate 44 is a limit switch LS1.
There is no problem even if you use two pieces, one for limit switch LS2 and one for limit switch LS2. As described above, according to the device for pressing the rotating brush against the surface of the object to be cleaned in the rotating brush type cleaning machine according to the present invention, the detecting means LS1 and LS2 detect the left and right sides of the rotary brush 24 that are pivotally supported between the swinging ends. Detecting the vertical swing angle of the pair of brush arms 21 and 22,
Based on this detection signal, the lifting platform 4 on which the rotating brush mechanism is mounted is operated to raise and lower.
Since the elevation angle of the brush arms 21 and 22 can be kept almost constant during cleaning, the pressing force of the rotating brush 24 against the surface of the object to be cleaned can be kept almost constant regardless of changes in the height of the same surface. This has the effect of preventing uneven cleaning, and also prevents damage to the surface of the object being cleaned due to the angles of the brush arms 21 and 22 changing greatly during cleaning and the arms or accessories colliding with the surface of the object to be cleaned. It has the excellent effect of not having any

[Brief explanation of the drawing]

FIG. 1 is a side view of a brush pressing device in a rotary brush type washing machine showing one embodiment of the present invention, and FIG.
3 is a front view of the same, FIG. 4 is an explanatory diagram of the main parts of FIG. 1, FIG. 5 is a hydraulic piping diagram of the embodiment device, and FIG. This is the same operation table. LS1, LS2... Limit switch as detection means, θ ₁ - _{θ 2} ... Predetermined swing range, 4... Lifting platform as movable part, 3... Power drive means, 21, 2
2... Brush arm, 24... Cylindrical rotating brush, 36... Biasing means.

Claims (1)

[Scope of Claims] 1. A traveling trolley 2, a lifting platform 4 provided on the upper part of the traveling truck 2, and a lifting platform 4 provided between the traveling truck 2 and the lifting platform 4 for raising and lowering the lifting platform 4 with respect to the traveling truck 2. A power drive means 3 for operating the object, and left and right sides that are pivotably supported on the lifting platform 4 below the object to be cleaned, and a cylindrical rotary brush 24 is rotatably supported between the swinging ends thereof. A rotating torque is applied to the pair of brush arms 21, 22 to bring the rotary brush 24 into contact with the surface to be cleaned on the lower surface of the object to be cleaned from below with a constant pressing force. and detecting means LS1, LS2 for detecting the vertical swing angle of the brush arms 21, 22, and detecting the above-mentioned power based on the detection signal of the detecting means. A brush pressing device for a rotary brush type washing machine, characterized in that it is configured to raise and lower a lifting platform 4 by controlling a driving means 3.