JP2012214291A - Vehicle for high lift work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle for high lift work having a ladder or a tower capable of tiltably correcting the upper surface of a turn table to the horizontal against the large inclinations of a vehicle body in all directions without increasing the extension amount of jacks more than necessary.SOLUTION: This work vehicle on which an engine is mounted and which is run by rotating wheels by the rotating drive force of the engine includes a ladder or a tower and jacks for stabilizing the vehicle body which are provided for operating the ladder or the tower. The work vehicle also includes two upper and lower slewing ring bearings for correcting the inclination of the vehicle in high lift work. The upper slewing ring bearing is tilted. The inclination of a place where the vehicle is set up is corrected by the slewing ring bearings and the jacks to level the upper surface of the turn table.

Description

  The present invention relates to an aerial work vehicle such as a fire engine equipped with a ladder or a tower having a jack for stabilizing a vehicle body.

  2. Description of the Related Art Conventionally, high-altitude work vehicles such as ladder fire engines equipped with ladders or towers are used for accidents, fires, other disasters, fire extinguishing and rescue at work sites, or high-altitude work. These high-altitude work vehicles are rushed to the site with high capacity, and after arriving at the site, they are installed at various locations and can be utilized to achieve their respective tasks in a stationary state.

  Now, such an aerial work vehicle is intended to work at a high place by raising, lowering, turning, and extending a ladder or tower, and in order to stabilize the vehicle body so that the vehicle does not fall down at that time, Two car body fixing jacks are provided.

  When operating a ladder or tower, the top surface of the turntable on which the ladder or tower is attached should be as horizontal as possible. In particular, the ladder fire engine must be operated with the top surface of the turntable always level to ensure the expected strength of the ladder.

  In the past, four jacks were operated to level the top surface of the turntable, and the ladder or tower was operated with the top surface of the turntable leveled as much as possible by adjusting the extension length of the jack cylinder rod. However, when the inclination of the installation location of the vehicle is large, the vehicle body cannot be leveled because the extension amount of the jack is limited.

  In contrast, the inclination angle that can be corrected by increasing the extension amount of the jack or devising the mounting position is increased. In addition, the angle and direction of the tilt angle of the top surface of the turntable is measured with an inclinometer, and the optimal extension amount of each jack is calculated to make the top surface of the turntable horizontal by computer control. And the body is level. However, even in such a method, when the interval between jacks is large as in the longitudinal direction of the vehicle body, a sufficient inclination correction angle cannot be obtained.

  In the conventional method described above, in order to correct a large inclination of about 7 degrees horizontally, the jack stroke becomes long, the jack body becomes too large, and there is a problem in terms of strength and bodywork. Absent.

  The present invention has been made in view of such circumstances, and it can be turned not only in the lateral direction of the vehicle body but also in a large inclination of about 7 degrees in the longitudinal direction of the vehicle body without increasing the extension amount of the jack more than necessary. The aim was to provide a vehicle for high-altitude work with a mechanism that does not have a complicated structure that can straighten the upper surface of the table.

  A high-altitude work vehicle according to the present invention is a work vehicle that is equipped with an engine and travels by rotating wheels by its rotational driving force, and is equipped with a ladder or tower for high-altitude work. A car body stabilization jack is provided to operate the car, and it has two upper and lower slewing ring bearings at the bottom of the turntable to correct the tilting of the car body during work, of which the upper slewing ring bearing is tilted, The upper and lower slewing wheel bearings and jacks can correct the vehicle body tilt according to the location of the vehicle and make the turntable upper surface horizontal.

  Each swivel ring bearing is provided with a gear, and each gear is engaged with a rotating gear of a worm reducer, and each swivel wheel is driven by driving two upper and lower worm reducers fixed to the turntable and the vehicle body. The bearing can be rotated.

  Two worm reducers on the top and bottom are used to drive the two slewing ring bearings provided at the bottom of the turntable, and the two slewing ring bearings are simultaneously driven by driving the two worm reducers to change the tilt angle direction of the turntable. Rotate in the opposite direction at the same rotational speed. At the same time, by turning the ladder or tower with the hoisting cylinder, the turning wheel can be rotated with the ladder or tower placed on the front cradle without changing the position of the ladder or tower. You can change the direction.

  When operating the ladder or tower, after installing the jack and raising the ladder or tower from the front cradle, the lower worm reducer of the upper and lower two worm reducers is stopped and the upper worm reducer is driven. Can turn the ladder or tower.

  The same function can be achieved even if one or two of the two worm speed reducers are replaced with a planetary gear type driving device.

  Holes spaced at equal intervals on the circumference are provided in the inner ring of the lower slewing wheel bearing, and a lock cylinder is fixed to the vehicle body under the hole. Pull the lock cylinder rod downward to unlock the lower swivel bearing. Next, in order to change the tilt angle direction of the turntable, the worm reducer is driven to rotate the upper turning wheel bearing. At the same time, by rotating the ladder or tower with the hoisting cylinder, the swivel wheel can be rotated with the ladder or tower placed on the front cradle without changing the position of the ladder or tower, and the turntable tilted. The angular direction can be changed.

  When turning a ladder or tower, use a worm reducer to drive the upper slewing ring bearing of the two slewing ring bearings provided at the lower part of the turntable, and insert the lock cylinder rod upward into the lower hole. Lock the swivel bearing. In this way, since the lower swivel bearing does not rotate, the turning operation of the ladder or tower can be performed by driving the upper worm speed reducer.

  An inclinometer is installed on the top surface of the turntable, and the numerical value is taken into the computer controller when the vehicle is installed. The tilt angle and direction of the top surface of the turntable are calculated, and then the tilt angle is adjusted by rotating the swivel wheel. By correcting as much as possible by tilting, correcting the tilting of the upper surface of the remaining turntable by a jack, and making the upper surface of the turntable flattened automatically by computer control.

  According to the present invention, it is possible to correct a large inclination angle with a short jack stroke, that is, a relatively small jack in an aerial work vehicle. In addition, since it can be constituted by a combination of general-purpose slewing ring bearings without requiring a complicated slewing ring for correction, it is possible to provide an inexpensive apparatus with improved maintainability and safety.

  FIG. 1 is a view showing a traveling state in appearance of the aerial work vehicle 1 according to the present invention, and FIG. 2 is a view showing the traveling state and the inside of a turning wheel 21 being understood.

  In FIG. 1, an aerial work vehicle 1 can be driven by an engine mounted on the vehicle.

  In FIG. 1, the aerial work vehicle 1 is in a traveling state in which a ladder 12 and a jack 13 are mounted and stored.

  In FIG. 2, the structure inside the turning wheel 21 in the traveling state of the aerial work vehicle 1 is shown. In this case, the turning wheel 21 is in a state where the lower one is directed forward, but it may be rearward.

  FIG. 4 is a view showing a work state in which the high-altitude work vehicle 1 according to the present invention is installed on an inclined ground, and FIG.

  In FIG. 4, the turntable upper surface 17 is maintained on a horizontal plane necessary for operating the ladder 12. Thereby, the raising / lowering, expansion / contraction, refraction, and turning operations of the ladder 12 can be performed safely.

3 and 4, a mechanism for making the turntable upper surface 17 a horizontal plane will be described.
Two slewing ring bearings 26, 27 are combined vertically at the lower part of the turntable 15, and the upper slewing ring bearing 26 is inclined, and the inclination direction is rotated 360 degrees by the lower slewing ring bearing 27. It can be done. In the case of FIG. 4, the inclination of the vehicle installation location has a large angle with a high front in the vehicle longitudinal direction. In this case, the lower side of the turning wheel 21 is directed forward of the vehicle, and the turntable upper surface 17 is leveled with a jack. Therefore, the inclination of the installation surface is corrected by the combined angle of the inclination angle of the turning wheel 21 and the inclination adjustment angle by the jack 13, and the turntable upper surface 17 becomes a horizontal plane.

  FIG. 6 is a diagram illustrating a working state in which the vehicle is installed when the inclination is in the left-right direction of the vehicle body.

  In FIG. 6, unlike FIG. 4, the inclination of the installation place has a large angle where the left is high in the left-right direction of the vehicle. In this case, as in FIG. 4, the lower side of the turning wheel 21 is directed to the left side of the vehicle, and the turntable upper surface 17 is leveled by the jack 13. Thereby, the inclination of the installation surface is corrected by an angle obtained by synthesizing the inclination angle of the turning wheel 21 and the inclination adjustment angle by the jack 13, and the turntable upper surface 17 becomes a horizontal surface. At this time, as shown in FIG. 7, the outrigger 22 is extended to the left and right, and the position of the jack 13 is expanded to the left and right, in order to ensure the stability of the vehicle body during the work. FIG. 8 shows a state in which the upper surface 17 of the turntable is leveled by the turning wheel 21 and the jack 13.

  In the case of a ladder fire engine, since it is used in an emergency, it is used under various conditions. It must be possible to use the installation site at a large inclination angle of up to about 7 degrees. In this case, if the inclination of the turning wheel 21 is set to 3.5 degrees, for example, if the inclination of the installation place is 7 degrees, the inclination is corrected to 3.5 degrees with the turning wheel 21 and the remaining 3.5 degrees is corrected with the jack 13. A total of 7 degrees of tilt correction is possible. However, the ratio of the correction angles of the turning wheel 21 and the jack 13 may be selected in accordance with the purpose of use of the work vehicle.

For example, when correcting the inclination of a maximum of 7 degrees, if the turning wheel 21 has an inclination of 3.5 degrees, the necessary correction angle of the jack 13 when the inclination of the vehicle body is 0 degrees is 3.5 degrees. The necessary correction angle of the jack 13 when the inclination of the vehicle body is 3.5 degrees is 0 degree, and when it is 7 degrees, it is 3.5 degrees. Therefore, in any case, the maximum of 3.5 degrees may be corrected with the jack 13.
When straightening with the jack 13 alone, the straightening ability of up to 7 degrees is naturally required. However, according to this method, the necessary correction capability of the jack 13 is half that of the jack alone, and the jack stroke can be shortened. Therefore, the jack 13 can be reduced in size.

  FIG. 9 is a view showing the internal structure of the turning wheel 21. The interior includes an upper slewing ring bearing 26, a lower slewing ring bearing 27, and an inclined ring 28. The inclination ring 28 is inclined and connects the upper turning wheel bearing 26 and the lower turning wheel bearing 27. In order to change the tilting direction of the turntable 15, the upper and lower slewing wheel bearings 26, 27 are simultaneously rotated in the opposite direction at the same speed by the respective worm speed reducers 19, 20, and at the same time, the hoisting cylinder 16 is simultaneously shortened and trapped. As a result, the ladder 12 is pressed against the ladder pedestal movable section 24 as shown in FIG. 5, and the turning wheel 21 is rotated without changing from the ladder pedestal movable section 24 to change the inclination direction of the turntable 15. I can do it.

  FIG. 10 shows a shape in which the inner ring of the upper slewing wheel bearing 26, the inner ring of the lower slewing wheel bearing 27, and the inclined ring 28 are integrated.

  FIG. 11 shows a method using a lock cylinder 30 instead of the lower worm reduction gear. In order to change the inclination direction of the turntable upper surface 17, the rod of the lock cylinder 30 is pulled in, the lower swivel bearing 27 is fixed, and the upper worm reducer 19 is driven to change the inclination direction of the turntable upper surface 17. After the tilt direction is set to a predetermined position, the rod of the lock cylinder 30 is once again inserted into the hole 32 of the inner ring 31 of the lower slewing ring bearing, and the lower slewing ring bearing 27 is fixed. In this way, the ladder 12 can be turned by the upper worm speed reducer 19.

  FIG. 12 shows the inner ring 31 of the lower slewing wheel bearing 27. Holes 32 into which the rods of the lock cylinder 30 are inserted when the lower slewing wheel bearing 27 is fixed are opened at equal intervals in the inner ring 31.

  The position of the turning wheel 21 in the traveling state may be any position in terms of the mechanism in which the lower one is not necessarily the front of the vehicle but the rear.

  As for the order of taking the inclination correction, either the rotation of the correction ring or the jack-up order can be first.

  FIG. 13 shows an example of input / output when correction is performed under computer control. The vehicle body is installed, and how much the vehicle body upper surface and the turntable upper surface are tilted in which direction and how much the vehicle body inclinometer and turntable inclinometer are calculated. Next, the lower side of the swivel wheel is rotated in the direction of higher body inclination, and then corrected with a jack.

  The inclination correction angle does not have to be 7 degrees, and can be set to 6 degrees or 5 degrees according to the purpose of use. Further, the correction angles of the turning wheel and the jack are not necessarily 3.5 degrees, and can be set to 2 degrees and 5 degrees, for example, according to the purpose of use.

  The ladder may be a tower with a closed cross section, for example. It can be used for all work vehicles that require the top surface of the turntable to be horizontal.

  In FIG. 9, the upper slewing wheel bearing 26 and the lower slewing wheel bearing 27 are both internal gears, but they may be external gears. In FIG. 12, the lower turning wheel inner ring 31 is provided inside the lower turning wheel bearing 27, but this may be provided outside.

  In addition, the structure, shape, dimensions, number, material, specifications, and the like of the whole or each part of the ladder, turning wheel, jack, outrigger, control system, or aerial work vehicle 1 are appropriately changed in accordance with the gist of the present invention. be able to.

It is a figure which shows the external appearance of the aerial work vehicle concerning this invention. It is a figure which the inside of a turning wheel understands by the external appearance of the high working vehicle concerning this invention. It is a top view after the inclination correction of the high working vehicle. It is a left view after the inclination correction of the high working vehicle. It is a figure of a ladder cradle in the rear view after the inclination correction of the high-altitude work vehicle. It is a rear view before the inclination correction of the high working vehicle. It is a rear view during the inclination correction of the high working vehicle. It is a rear view after the inclination correction of the high working vehicle. It is a figure which shows the internal structure of a worm reduction gear type turning wheel. It is a figure which shows the internal structure of a worm reduction gear type turning wheel. It is a figure which shows the internal structure of a lock cylinder type turning wheel. It is a figure which shows the inner ring | wheel lock hole of a lock cylinder type turning wheel. It is a figure which shows the input / output of control.

DESCRIPTION OF SYMBOLS 1 Vehicle for work in height 12 Ladder 13a, b, c, d Jack 14 Ladder mount 15 Turntable 16 Hoisting cylinder 17 Turntable upper surface 18 Ladder cradle 19 Upper worm reduction gear 20 Lower worm reduction gear 21 Swivel wheels 22a, b , C, d Outriggers 23a, b, c, d Jack cylinder rod 24 Ladder pedestal movable part 25 Ladder pedestal movable shaft 26 Upper turning wheel bearing 27 Lower turning wheel bearing 28 Inclination ring 29 Integrated inclination ring 30 Lock cylinder 31 Lower Swivel inner ring 32 Lock hole 33 Control device

Claims (8)

  A working vehicle that is equipped with an engine and that is driven by rotating wheels by its rotational driving force, is equipped with a ladder or tower for working at a high place, and a vehicle stabilization jack for operating the ladder or tower. There are two upper and lower slewing ring bearings at the bottom of the turntable to correct the tilt of the car body during work, of which the upper slewing ring bearing is tilted, and the vehicle is installed with two upper and lower slewing ring bearings and a jack. A vehicle for working at a high place, characterized by correcting the vehicle body inclination according to the place and making the upper surface of the turntable horizontal.   Each of the two slewing ring bearings is provided with a gear, and each of the gears meshes with a rotating gear of the worm speed reducer, and each of the turning wheels is driven by driving the upper and lower worm speed reducers fixed to the vehicle body. The vehicle for high-altitude work according to claim 1, wherein the wheel bearing can be rotated.   The two worm reducers are used to drive two slewing ring bearings provided at the lower part of the turntable, and the two slewing wheels are driven by the two worm reducers to change the tilt angle direction of the turntable. By rotating the bearings simultaneously in the opposite direction at the same rotational speed, the rotating wheel is rotated with the ladder or tower placed on the front cradle without changing the position of the ladder or tower, and the tilt angle direction of the turntable is changed. The aerial work vehicle according to claim 1 to be changed.   2. The high speed of claim 1, wherein when the ladder or tower is operated, the lower worm speed reducer of the two worm speed reducers is stopped, and the ladder or tower can be turned by driving the upper worm speed reducer. Work vehicle.   The vehicle for aerial work according to claim 1, wherein one or two of the two worm speed reducers are replaced with a planetary gear type driving device.   The inner ring of the lower slewing ring bearing is provided with a circumferentially spaced hole, and a lock cylinder is fixed to the vehicle body under the hole, and the lock cylinder rod is pulled downward to lock the lower slewing ring bearing. In order to change the tilt angle direction of the turntable, the upper slewing wheel bearing is rotated by driving the worm speed reducer, and the ladder or tower is placed on the front cradle without changing the position of the ladder or tower. The vehicle for high-altitude work according to claim 1, wherein the turning wheel is rotated while changing the inclination angle direction of the turntable.   The lower slewing ring bearing is locked by inserting the rod of the lock cylinder upward into the extrusion hole, and one worm speed reducer is used to drive the upper slewing ring bearing of the two slewing ring bearings provided at the lower part of the turntable. The vehicle for high-altitude work according to claim 1, wherein the ladder or tower can be turned by driving with the use of.   An inclinometer is provided on the upper surface of the turntable, the numerical value is taken into a computer control device when the vehicle is installed, the inclination angle and direction of the upper surface of the turntable are calculated, and then the inclination angle is determined by rotating the turning wheel. 2. The height according to claim 1, wherein correction is made as much as possible by tilting the swivel wheel, correction of inclination of the upper surface of the remaining turntable is corrected by a jack, and all of making the upper surface of the turntable into a horizontal plane is automatically performed by computer control. Work vehicle.

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