JP2544323Y2 - Inclination correction mechanism of the swivel platform for aerial work vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for correcting the inclination of a turntable in an aerial work vehicle such as a fire ladder vehicle.

[0002]

2. Description of the Related Art For example, when an aerial work vehicle such as a fire ladder vehicle is operated at a work site, a stop position of the work vehicle varies depending on the situation of the fire extinguishing work site and is not constant. Therefore, it is not unusual to stop the vehicle at a place where the ground is inclined and perform fire fighting.

On the other hand, in the case of a work vehicle with a turntable such as a fire ladder vehicle, it is essential that the vehicle be able to turn quickly and accurately in all directions during the fire extinguishing work.
Therefore, even when the work vehicle is parked on an inclined ground, from the viewpoint of work safety, it is ideal that the turntable always turns on the horizontal plane and the ladder can be raised and lowered in a vertical plane. It is necessary to correct the inclination of the turntable.

Up to now, as a method of correcting the inclination, a method of equipping the ladder itself with an inclination correcting device,
2. Description of the Related Art There is known a method in which a vehicle body is lifted by a support device such as an outrigger to correct the inclination.

[0005]

However, these methods have the following problems. That is, since the former method corrects the inclination of only the ladder,
The swivel remains in an inclined state. Therefore, every time the ladder is turned, it is necessary to correct the inclination, and there is a drawback that quick working conditions cannot be obtained. In the latter case, of course, a large amount of force is intensively applied to the outrigger to lift the work vehicle itself,
There is a drawback in that appropriate reinforcement is required to reduce the effect on the chassis and the like of the work vehicle.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to overcome the above-mentioned drawbacks and to secure work safety by using an extremely simple device, and to enable quick work.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems by providing a tilting mechanism for a swivel base in an aerial work vehicle characterized by the following structure. First, a tilt correcting mechanism according to the first invention of the present application includes a base 9 fixed on a vehicle body, a first correction table 10 rotatably mounted on the base in a lateral direction, and a first correction table. A second correction table 12 arranged above the first correction table, and a tilt correction means 13 for supporting the second correction table above the first correction table and adjusting the vertical angle of the second correction table with respect to the first correction table, 14, a turntable 20 mounted on the second correction table so as to be freely rotatable in the lateral direction and carrying a working device such as a ladder, a first rotation drive unit 22 for rotating the first correction table in the horizontal direction, A second rotation drive unit 25 for rotating the table relatively to the second correction table in the lateral direction, an inclination angle detection unit 30 for detecting an inclination angle of the swivel table, and the first correction table rotating with respect to the vehicle body. And a correction table fixing portion 32 for fixing the correction table so as not to be fixed. And thereby, the first correction table 10 by the first rotation drive unit 22 is provided.
The rotation table 20 is rotated in the opposite direction by the second rotation drive unit 25 during the rotation of the rotation table, and the inclination of the rotation table 20 can be corrected to a horizontal state by the inclination correction means 13 and 14.

Further, the second invention of the present application is the above-mentioned first invention.
In the inclination correcting mechanism according to the present invention, the first rotation driving unit 2
2, control means 35, 36, and 3 for controlling the operations of the second rotation drive unit 25, the inclination correction means 14, and the correction table fixing unit 32.
7, 38, and a rotation angle detection unit 31 that detects the rotation angle of the first correction table. The rotation angle detection unit 31 and the inclination angle detection unit 30 are connected to control means 35, 36, 37, and 38. Based on the information and the information from the rotation angle detector 31, a required rotation angle x to rotate the first correction table 10 is obtained, and the first rotation drive unit 22 is controlled to rotate the first correction table 10 and The two-rotation drive unit 25 is controlled to rotate the swivel table 20 in the opposite direction, and further, the correction table fixing unit 32 is controlled to fix the first correction table 10.
The tilt correction means 14 is controlled on the basis of the information from the above to rotate the swivel table 20 in the vertical direction until it becomes horizontal.

[0009]

In the first invention of the present application, the inclination correcting means 1
4 is operated to correct the inclination of the swivel 20. The inclination correcting means 14 is moved to a position where the inclination can be corrected.
Need to be rotated sideways. Therefore, the first correction table 10 on which the inclination correction means 14 is mounted is rotated by the first rotation drive unit 22. However, when the first correction table 10 is rotated, even the swivel table 20 on which a working device such as a ladder is loaded is rotated, which is dangerous. Therefore, in the first invention of the present application, the first correction table 10 By rotating the swivel base 20 in the reverse direction by the second rotation drive unit 25 during the rotation, the swivel base 20 is kept relatively stopped with respect to the base 9. After that, the second straightening table 1 is further tilted by the tilt straightening means 13 and 14.
2 to correct the inclination of the swivel 20 placed on it to a horizontal state.

As described above, according to the first invention of the present application, even if a work vehicle such as a fire ladder vehicle is on an inclined ground, the turntable 2 can be used.
The inclination of the zero itself can be corrected. As a result, the working machine such as a ladder always rotates on a horizontal plane, and the undulating operation is performed in a vertical plane. Therefore, operations such as undulation, expansion, contraction, and rotation are performed safely and smoothly, and the operation is always performed in a stable state. It becomes possible. In addition, since the configuration of the apparatus is extremely simple, a special processing technique is not required, and a good effect can be obtained in terms of manufacturing cost.

Further, in the second invention of the present application, since the control means automatically performs the above-mentioned correcting operation, an accurate correcting operation is performed without requiring skill in operation. Is what you can do.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a fire truck with a telescopic ladder as an example of an aerial work vehicle provided with an automatic inclination correcting mechanism according to an embodiment of the present invention. First, the outline of the fire engine will be described with reference to FIG.
Denotes a support frame for supporting the ladder, 3 denotes a ladder raising / lowering cylinder, 4 denotes an outrigger, and 5 denotes a ladder support post attached to the vehicle body 6. The telescopic ladder 1 is attached to the support frame 2 so as to be able to move up and down, and is raised and lowered by the action of the ladder raising and lowering cylinder 3. The support frame 2 is attached to the vehicle body frame 7 via the inclination correcting mechanism 8 according to the present invention. And, even if the vehicle body 6 is on an inclined ground, the support frame 2 supporting the telescopic ladder 1 can always turn on a horizontal plane by the action of the inclination correcting mechanism 8.

Next, the inclination correcting mechanism 8 will be described in detail with reference to FIGS. FIG. 2 is a side sectional view of the automatic inclination correcting mechanism 8, and FIG. 3 is a side sectional view of the automatic inclination correcting mechanism 8 after the inclination correcting operation. FIG. 4 is an explanatory view of the automatic inclination correcting mechanism 8 as viewed from the support table side, and FIG. 5 is an explanatory view of the automatic inclination correcting mechanism 8 as viewed from the cylinder side.

The automatic inclination correcting mechanism 8 includes a base 9 fixed on the body frame 7 and a first bearing 11 on the base 9.
A first correction table 10 rotatably mounted via
A second correction table 12 is provided above the first correction table 10 via tilt correction means. This inclination correction means,
The one that supports the second correction table 12 above the first correction table 10 and rotates the second correction table 12 in the vertical direction with respect to the first correction table 10 to adjust the vertical angle thereof is appropriately selected. Although it can be implemented, in this embodiment, the support table 13 and the inclination correction cylinders 14 and 14 'are used. The support table 13 is fixed on the first correction table 10, and the second correction table 12 is pivotally connected to the upper end of the support table 13 by a pivot 15. The tilt correction cylinders 14 and 14 'have their lower ends pivotally connected to the first correction table 10 by pivot shafts 19 and 19', and their upper ends pivotally connected to the second correction table 12 by pivot shafts 16 and 16 '. Have been. Therefore, when the rods 17 and 17 ′ of the inclination correction cylinders 14 and 14 ′ extend, the second correction table 12 moves the pivot shaft 15 at the upper end of the support table 13.
Is tilted upward (in the direction of arrow 18).

As shown in FIG. 2, a pedestal portion 39 is provided on the right side of the inclination correcting cylinders 14, 14 '. The pedestal portion 39 has its lower end fixed to the first correction table 10, and its upper end abuts against and supports the lower surface of the second correction table 12. In addition, even if the pedestal portion 39 is not provided, the second correction table 12 is supported by the inclination correction cylinders 14 and 14 ', but the inclination correction cylinders 14 and 14'.
If the hydraulic circuit is shut off and the oil does not flow in and out while the rods 17 and 17 'are contracted, the support by the inclination correcting cylinders 14 and 14' may be unstable. Therefore, if the pedestal portion 39 is provided, reliable support can be realized, and furthermore, only by placing the second correction table 12 on the upper end of the pedestal portion 39, the retractable ladder 1 is stored, and strictly. This eliminates the need for accurate storage alignment, which is advantageous. Further, if a fixing device is provided on the pedestal portion 39 to fix the second correction table 12, a more stable state can be realized even when the vehicle is running. Further, the pedestal portion 39 also functions as a safety device. That is, the tilt correction cylinders 14, 14 'should be used.
In the event of a failure, the second correction table 12 may rotate further downward than the state of FIG. 2 and a large accident may occur. However, by providing the pedestal section 39, The second correction table 12 is received, and the state shown in FIG. 2 can be maintained to prevent the occurrence of an accident.
The tilt correcting means extends the rods 17, 17 'of the tilt correcting cylinders 14, 14' with the support 13 as a fulcrum, and rotates the second correction table 12 upward (in the direction of arrow 18) to tilt. Pedestal 39
Does not have any adverse effect on normal operation.

Reference numeral 20 denotes a turntable which is mounted on the second correction table 12 via a second bearing 21 so as to be rotatable in the lateral direction. On the turntable 20, the ladder support frame 2 is mounted. ing.

Reference numeral 22 denotes a first rotary drive unit. The first rotary drive unit 22 is fixed on the base 9, and its output shaft 23 penetrates the base 9 and reaches the inside of the first correction table 10. ,
A small gear 24 is attached to the tip of the projecting output shaft 23. When the small gear 24 meshes with the internal toothed gear 28 engraved inside the first correction table 10, the first correction table 10 is rotated. Reference numeral 25 denotes a second rotary drive unit, which is fixed on the swivel 20 and whose output shaft 26 passes through the swivel 20 to reach the inside of the second correction table 12. A small gear 27 is attached to the tip of the projecting output shaft 26. When the small gear 27 meshes with an inner peripheral gear 29 engraved inside the second correction table 12, the swivel table 20 is rotated relatively to the second correction table 12.

Reference numeral 30 denotes a tilt angle detecting section of the swivel 20 for detecting the tilt angle of the swivel 20 by using, for example, a conventionally known tilt angle sensor. Reference numeral 31 denotes a rotation angle detection unit of the first correction table 10, which detects a rotation angle of the first correction table 10 in a lateral direction by, for example, a rotary encoder.

Reference numeral 32 denotes a correction table fixing portion. In this embodiment, the operating pin 33 is advanced and retracted by the action of the solenoid 34, and is pressed against the side surface of the first correction table 10 when fixed. 10 is prevented from rotating.

The mechanical structure of this embodiment has been described above. In this embodiment, these structures are controlled by the following control means so that the inclination correcting operation can be automatically performed. First, the first rotation drive unit 22 is controlled by a first rotation drive control unit 35 connected thereto. The second rotation drive unit 25 is controlled by a second rotation drive control unit 36 connected thereto. Further, the inclination correcting cylinders 14 and 14 'are controlled by an inclination correcting drive control unit 37 connected thereto. Reference numeral 38 denotes a main control unit.
Is composed of a conventionally known microcomputer and the like,
Based on the information from the inclination angle detection unit 30 and the rotation angle detection unit 31, each of the first rotation drive control unit 35, the second rotation drive control unit 36, the inclination correction drive control unit 37, and the correction table fixing unit 32 is used. Collectively control the operation. It should be noted that the above mechanical configuration can be controlled by a human without using these control means.

Next, the inclination correcting operation performed by the automatic inclination correcting mechanism of this embodiment will be described. In the following description, the case where the inclination correction operation is automatically performed by controlling by the control means is described. However, when the control means is not used, the same operation can be performed by human control. FIGS. 6 to 9 show conceptual diagrams of the correcting operation, and should be referred to in conjunction with FIGS. 1 to 5. However,
This conceptual diagram does not match the shape and size of each part with FIGS. 1 to 5, such as drawing the lower first straightening table 10 the largest and drawing the upper swivel table 20 the smallest. ,
It is represented by a larger tilt angle than in the actual case.

First, when the vehicle is actually stopped on a slope or the like to perform a tilt correction operation, the center point b between the tilt correction cylinders 14 and 14 'of the first correction table coincides with the origin of the rotation angle detector 31. It is in a state of having done. 6 to 9,
The description will be made on the assumption that the vehicle 6 is stopped while leaning to the right.

First, the inclination angle of the swivel 20 is detected by the inclination angle detecting section 30, and the main control section 38 calculates the direction of the lowest point (L direction) based on the information, and calculates the current direction. The required rotation angle x from the center point b is calculated (FIGS. 6 and 7). Then, the solenoid 34 of the correction base fixing part 32 is operated to move the operation pin 33 backward, and the fixing of the first correction base 10 is released.

Next, the first rotation drive control unit 35 causes the first rotation drive unit 22 to rotate the first correction table 10 based on the information on the required rotation angle x. During this rotation, the rotation angle detection unit 31 continues to detect the rotation angle y1 of the rotating first correction table 10, and sends a signal of the rotation angle to the main control unit 38. At the same time, the main control unit 38 determines that the rotation angle y1
Is compared with the target required rotation angle x.
Further, at this time, based on the above signal of the rotation angle y1,
The second rotation drive control unit 36 operates the second rotation drive unit 25 so that the swivel 20 rotates in the reverse direction y2 at the same speed as the first rotation drive unit 22. Thus, the swivel 20
Since the first correction table 10 rotates in the opposite direction at the same speed as the rotation of the first correction table 10, the first correction table 10 is kept in a state of not rotating relative to the base 9.

The rotation continues until the signal of the rotation angle y1 sent from the rotation angle detection unit 31 and the target required rotation angle x coincide with each other. The operation of the second rotation driving unit 25 is stopped (FIGS. 8 and 9).

Next, the operating pin 33 of the correction table fixing section 32 is advanced to fix the rotation of the first correction table 10. In this state, the imaginary line a connecting the center point b between the tilt correction cylinders and the center point of the first correction table 10 coincides with the tilt direction L of the vehicle, that is, the turntable 20, and the tilt correction cylinder 1
The 4, 14 'side is the lowest position.

Next, as shown in FIG. 2, the inclination correcting drive controller 37 controls the inclination correcting cylinders 14 and 14 '.
Is activated to extend the rods 17 and 17 '.
The second correction table 12 is rotationally moved upward in the direction of arrow 18 about the pivot shaft 15 above the support table 13. This movement is continued until the angle detected by the inclination angle detection unit 30 becomes zero. Then, the angle 0, that is, the second correction table 12
When the swivel 20 mounted thereon is in a horizontal state, the inclination correcting drive control unit 37 stops the operation of the inclination correcting cylinders 14 and 14 ′. Thus, as shown in FIG. 3, the swivel 20 and the second correction table 12 are inclined with respect to the first correction table 10 and the base 9. It becomes possible to rotate in the horizontal direction while maintaining the horizontal state. When the ladder or the like is operated, the portion below the second correction table 12 is fixed, so that only the swivel table 20 can be rotated in any direction on the horizontal plane by operating the second rotation drive unit 25.

In the above embodiment, the cylinder used for the means for correcting the inclination is merely an example. In addition, the cylinder satisfying the gist of the mechanism of the present invention in which the second correction table is rotated up and down to incline. If there is no means to select any means, for example, a method of lifting the second correction table using a chain or belt mechanism driven by a hydraulic motor or the like, or a method of mechanically rotating and tilting by a combination of gears, etc. Any method can be adopted. In addition, the rotation driving means of each correction table is not limited to the one driven by the engagement of gears using a hydraulic or electric motor as in the above-described embodiment, and may be a manual gear device or driven by a belt or a chain. Any method such as a method can be adopted. In addition, in addition to the one according to the embodiment, the correction base fixing portion uses a locking pin, a worm gear or the like for transmission of rotation driving means, or employs a device having a lock mechanism. Arbitrary means such as sharing the correction table fixing device can be selected.

In addition to the above-described embodiment, the rotation angle detector and the inclination angle detector may be replaced by a known sensor, another device for detecting the rotation angle, or a device for detecting the inclination angle. Absent. In addition, it goes without saying that various other structures in the apparatus may be adopted unless they depart from the gist of the mechanism of the present invention.

[0030]

As described above, the mechanism according to the first invention of the present application has a device for correcting the inclination of the turntable of the aerial work vehicle,
Moreover, it is an epoch-making device that can ensure the safety of operation of the aerial work vehicle with an extremely simple device configuration.
Further, the mechanism according to the second invention of the present application is capable of automatically and accurately correcting the inclination of the swivel of the aerial work platform, thereby ensuring the safety of operation while reducing the labor of the operator. Is what you can do.

[Brief description of the drawings]

FIG. 1 is a side view of a fire truck with a telescopic ladder as an example of an aerial work vehicle provided with an automatic inclination correcting mechanism according to an embodiment of the present invention.

FIG. 2 is a side sectional view of an automatic inclination correcting mechanism according to an embodiment of the present invention.

FIG. 3 is a side cross-sectional view after the inclination correcting operation of the automatic inclination correcting mechanism.

FIG. 4 is an explanatory view of the automatic inclination correcting mechanism as viewed from a support table side.

FIG. 5 is an explanatory view of the automatic inclination correcting mechanism as viewed from a cylinder side.

FIG. 6 is a conceptual diagram showing a state before the automatic inclination correcting mechanism is operated, as viewed from above the vehicle.

FIG. 7 is a conceptual view showing the state before the automatic inclination correcting mechanism is operated, as viewed from the rear of the vehicle.

FIG. 8 is a conceptual diagram showing a state where the automatic inclination correcting mechanism is being operated, as viewed from above the vehicle.

FIG. 9 is a conceptual diagram showing a state where the automatic inclination correcting mechanism is being operated, as viewed from the rear of the vehicle.

[Explanation of symbols]

 Reference Signs List 9 base 10 first correction table 12 second correction table 13 support table (tilt correction means) 14 tilt correction cylinder (tilt correction means) 20 swivel table 22 first rotation drive unit 25 second rotation drive unit 30 tilt angle detection unit Reference Signs List 31 rotation angle detection unit 32 correction unit fixing unit 35 first rotation drive control unit 36 second rotation drive control unit 37 inclination correction drive control unit 38 main control unit

Claims (2)

(57) [Scope of request for utility model registration] A base (9) fixed on a vehicle body and a first correction table (1) mounted on the base so as to be rotatable in a lateral direction.
0) and a second correction table (1) arranged above the first correction table.
2), tilt correction means (13) (14) for supporting the second correction table above the first correction table and adjusting the vertical angle of the second correction table with respect to the first correction table, and the second correction table A swivel (20), which is mounted on the table so as to be freely rotatable in the horizontal direction and carries a working device such as a ladder, a first rotation drive unit (22) for rotating the first correction table in the horizontal direction, and a swivel A second rotation drive unit (25) that rotates in the lateral direction relatively to the second correction table, an inclination angle detection unit (30) that detects an inclination angle of the swivel table, and a first correction table with respect to the vehicle body. Orthodontic table fixing part to fix so that it does not rotate (32)
While rotating the first correction table (10) by the first rotation drive section (22), the rotation table (20) is rotated in the reverse direction by the second rotation drive section (25), and further, inclination correction means (13) (14) swivel (20)
A tilting mechanism for a turntable in an aerial work vehicle, the tilt of which can be corrected to a horizontal state. 2. A tilt correcting mechanism for a turntable in an aerial work vehicle according to claim 1, wherein said tilt correcting mechanism comprises a first rotary drive section (22), a second rotary drive section (25), and tilt correcting means. (14) and control means (35) (36) (37) (38) for controlling each operation of the correction table fixing part (32), and a rotation angle detection part (31) for detecting the rotation angle of the first correction table The rotation angle detection unit (31) and the inclination angle detection unit (30) are connected to control means (35), (36), (37), and (38). A required rotation angle (x) at which the first correction table (10) is to be rotated is determined based on information from the detection unit (30) and information from the rotation angle detection unit (31), and the first rotation drive unit (22 ) To rotate the first straightening table (10) and control the second rotation drive unit (25) to rotate the swivel table (20) in the opposite direction. Control to fix the first correction table (10), and to check the inclination angle. Turning in a vertical work vehicle, which controls the inclination correcting means (14) based on information from the output section (30) to rotate the swivel base (20) up and down until it becomes horizontal. Table tilt correction mechanism.