KR101647671B1 - Device for automatically extending boom of a boom vehicle - Google Patents

Device for automatically extending boom of a boom vehicle Download PDF

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Publication number
KR101647671B1
KR101647671B1 KR1020150071036A KR20150071036A KR101647671B1 KR 101647671 B1 KR101647671 B1 KR 101647671B1 KR 1020150071036 A KR1020150071036 A KR 1020150071036A KR 20150071036 A KR20150071036 A KR 20150071036A KR 101647671 B1 KR101647671 B1 KR 101647671B1
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KR
South Korea
Prior art keywords
boom
winch
car
encoder
unit
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KR1020150071036A
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Korean (ko)
Inventor
홍용
김영길
유석준
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주식회사 호룡
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Priority to KR1020150071036A priority Critical patent/KR101647671B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B66F11/046—Working platforms suspended from booms of the telescoping type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms

Abstract

The present invention relates to a boom automatic take-off device of a ladder car that controls a boom to be automatically drawn out to a target draw length preset in a ladder car.
In order to accomplish this, a boom winch unit is installed in a boom winch unit for installing a transportation car winch encoder in a car car winch unit for lifting and lowering a transportation car and for pulling out a boom, but an encoder of an increment type other than an absolute type is installed Counts the number of square wave pulses output from the conveyance winch encoder and the boom winch encoder while the boom is pulled out and drawn out, stores the number of square wave pulses in the memory, and then, using the number of pulses counted by the encoder, The length of the wire loosened by the unit and the boom winch unit is calculated and compared with the target draw-out length of the boom which sets the calculated wire length in advance, the boom can be pulled out until it becomes the same, In the present invention.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a boom automatic draw-

[0001] The present invention relates to a boom automatic draw-out device for a ladder car which enables a boom to be automatically drawn out to a target length set by a user in a ladder equipped with a boom stand comprising a multi-stage boom, The boom can be automatically drawn to the target length by detecting the length of the boom drawn out from the boom.

Generally, an elevated ladder car is constructed such that a multi-stage boom is drawn out in a longitudinal direction in a stepwise manner, stretched to a predetermined length, then placed in a high place of the building, and the transportation car can be raised and lowered along a multi- So that it can be moved up and down.

Fig. 1 shows an example of a conventional ladder car. As shown in the accompanying drawings, the ladder 1 includes a boom frame 10 on which a multi-stage boom is installed so as to be able to be drawn out from the vehicle, A transport car winch unit 12 provided at the lower end of the lowermost boom so that one end of the wire wound around the drum can be connected to the transport car 11 to raise and lower the transport car 11, A boom winch angle adjusting cylinder 14 for adjusting the angle of the boom, and a boom winch mounted on an unused boom boom to support the boom winch. Each boom is extended according to the driving of the boom winch unit 13. The booms are extended and the boom is lifted by the driving car 11 in accordance with the driving of the car winch unit 12 Hauling Copper is carried out.

It is also possible to safely control the moving stroke of the transportation car 11 from the lowermost end to the uppermost end of the boom frame 10 by detecting the passage of the transportation car 11 from the uppermost boom of the boom frame 10, During the lifting, the lifting speed of the transporting car is decelerated. While the transporting car 11 is descending, it detects the completion of the lifting of the upper decelerating limit sensor 21 and the transporting car 11, Up limit sensor 22 for stopping the car 11 and a load sensor 23 for sensing the load of the car 11. The car 11 is moved from the lowermost boom of the boom, A lower decelerating limit sensor 24 installed at a position for decelerating the speed of the conveying car 11 while the conveying car 11 is lowered and increasing the elevating speed of the conveying car 11 while the conveying car 11 is ascending, ) To stop the transportation car 11 And a boom support restraint limit sensor 26 for sensing a boom restraint limit sensor 25 for detecting a boom restraint limit position and a boom rest restraint limit sensor 25 for sensing whether the boom rest 10 is seated on the boom support 15. [ (27) and the like are provided.

The above sensors are connected to the main controller 30 installed at the lower part of the lower boom through a data cable. In particular, the upper and lower limit acceleration sensors 21 and 22 on the upper part of the boom, And is connected to the main controller 30 through an auxiliary controller 35 installed in the main controller 30. The data cable 32 connected between the main controller 30 and the auxiliary controller 35 is wound around the data reel 38 so as to correspond to the length of the boom bar to be stretched or shrunk, And the other end is connected to the main controller 30 so that data can be transmitted and received while loosening or winding the data cable wound around the data reel 38 in accordance with the expansion and contraction of the boom frame.

However, the moving data cable 32 wound around the data reel 38 has a problem that the cable may be disconnected or short-circuited during use for a long time. Also, the electrical contact portion of the data reel 38 is corroded if it is used for a long period of time, The length of the data cable 32 released from the data reel 38 corresponding to the lead-out length of the boom frame 10 is also increased and exposed so that the boom can be caught by surrounding obstacles when the boom is pulled or rotated, If the data cable 32 is damaged due to tension, it is impossible to transmit / receive data, so that the automatic transfer function of the transportation car 11 can not be used and it is inconvenient to manually operate.

As a conventional technique for solving such a problem, Patent Document 10-2011-0112950 discloses a system for controlling the conveyance of a carriage car in a ladder using an encoder and a pressure sensor. The car is decelerated or stopped at the point where it is judged that the car is lifted up (descending) or down (down) stopped by sensing the length of the wire unwound or wound from the car winch unit. It was supposed to be used as a transfer system.

However, since the automatic transfer system of the conveyance car using the encoder has not relied on the naked eye and experience of the boom operator because the length of the boom can not be detected, there has been inconvenience of trial and error several times when the boom is drawn to the target length , Especially in the case of drawing to a high level, the number of times of trial and error increases, and it takes a lot of time to draw the boom.

Korean Patent Publication No. 10-2011-0032217 (published on Mar. 30, 2011) Korean Patent Publication No. 10-2011-0112950 (published on October 14, 2011)

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a boom winch unit for lifting and lowering a transportation car, and a boom winch unit for expanding and contracting the boom, To provide a boom automatic take-out apparatus of a ladder car which can quickly and conveniently draw out a boom.

In another aspect of the present invention, it is possible to control the position of the car winch unit and the boom winch unit through an incremental type encoder other than an absolute type encoder, thereby automatically releasing the boom of the ladder vehicle The present invention has an object of providing an apparatus.

In order to accomplish the above object, according to the present invention, there is provided an apparatus for automatically unloading a boom of a ladder vehicle, comprising: a boom bar made up of a plurality of booms in a ladder car; a carrying car lifted and lowered along the boom bar; A boom winch unit for pulling or folding the boom by fixing one end of the wire wound on the winch to each boom of the boom frame, and a boom frame seating sensor for detecting whether or not the boom frame is seated from the upper end of the boom support frame The boom automatic take-off device of the ladder car according to the present invention comprises: a conveyance winch encoder for sensing the number of revolutions of the conveyance car winch unit and measuring the amount of unloading of the conveyance car wire; A boom winch encoder for detecting the number of revolutions of the boom winch unit and measuring the amount of unloading of the boom wire; A boom automatic withdrawal setting unit for allowing a user to input a target withdrawal length of the boom; A boom automatic withdrawal button to which an automatic withdrawal start signal of the boom is inputted by the user; A basic length of the boom frame and information about a draw-out length per square wave pulse output from the conveyor winch encoder and the boom winch encoder are stored in advance, and the information is output from the conveyor winch encoder and the boom winch encoder A memory for counting and storing the number of square wave pulses; Then, the wire length calculated by counting the number of square wave pulses output from the conveyance car winch encoder and the boom winch encoder is compared with the target draw length of the boom, and the boom is automatically drawn out until it coincides to be drawn out to the target draw length And a main controller for controlling the main controller.

The main controller determines that the boom withdrawal is started when the boom stand detection sensor detects the departure of the boom stand and counts the number of square wave pulses output from the car winch encoder and the boom winch encoder to detect the wire pull amount of each winch .

The main controller counts the number of square wave pulses output from the carrier car winch encoder and the boom winch encoder and compares the amount of wire unwinding of each winch while detecting the amount of wire release of each winch. And a buzzer or a warning lamp is operated to display a warning.

The conveyor winch encoder or the boom winch encoder is provided so that an encoder rotary plate in which grooves and projections are periodically formed on the disk-shaped bracket circumferential surface is rotated integrally with the rotary shaft on the rotary shaft of the winch unit, Wherein the first proximity sensor and the second proximity sensor output a square wave pulse having a phase difference of 90 degrees at a position close to the groove and the projection in the sensor fixing bracket.

Wherein the main controller is configured to detect a rotational direction of the conveyance car winch unit or the boom winch unit according to a pattern in which a pair of pulse signals simultaneously output from the first and second proximity sensors are periodically output do.

Wherein the main controller is configured to detect a rotational direction of the vehicle car winch unit or the boom winch unit according to a pattern in which a pair of pulse signals output from the first and second proximity sensors are periodically output .

The main controller extracts a rectangular wave pulse corresponding to a pulse rising point and a pulse falling point of the pulses outputted from the first and second proximity sensors, respectively, and controls the amount of wire loosening of the car winch unit or the boom winch unit .

The present invention as described above can automatically pull the boom up to the target withdrawal length simply by operating the boom automatic withdrawal button, so that the operation of the user is simple and convenient, and the boom can be automatically withdrawn quickly to the target withdrawal length And it is advantageous in that the boom can be automatically drawn to the target withdrawal length accurately while using the relatively low-cost incremental encoder without using the expensive absolute encoder.

1 is an outline view of a conventional ladder car,
Fig. 2 is an installation state diagram of sensors for controlling automatic transportation of a transportation car to the boom bar of Fig. 1; Fig.
FIG. 3 is an outline view of a boom automatic drawing device for a ladder car according to an embodiment of the present invention,
FIG. 4 is an electrical connection diagram of a boom automatic take-out apparatus for a ladder car according to an embodiment of the present invention,
5 is a view for explaining a signal detecting operation of an encoder used in the present invention;
6 is a flowchart for explaining a boom automatic drawing method according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately define the concept of terms in order to describe his invention in the best way The present invention should be construed in accordance with the spirit and concept of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible. In addition, like reference numerals refer to like elements throughout the specification.

3 is a schematic diagram of a boom automatic take-off device for a ladder car according to an embodiment of the present invention. As shown in Fig. 1, the ladder 100 includes a boom frame 10, a car 11, A boom winch unit 13, a boom arm angle adjusting cylinder 14, a boom support 15, and the like.

In addition, a boom rest detection sensor 27 for detecting whether or not the boom frame 10 is seated is provided on the boom support 15 together with a boom pull-out limit sensor 26 for detecting the pull-out restriction position of the boom from the lowermost boom of the boom frame And more particularly to control the moving stroke of the transportation car 11 from the lowermost end to the uppermost end of the boom frame 10 in a safe manner. The lower end of the bottom boom of the boom frame 10 is provided with the rotation speed of the transportation car winch unit 12 A load sensor 28 for measuring the load of the transportation car 11 and a transportation car reference point sensor 29 for determining the movement reference point of the transportation car are installed in the boom, A boom winch encoder 50 for detecting the number of revolutions of the boom winch unit is provided so that the boom can be automatically drawn out by detecting the length of the draw. In addition, a main controller 30 for controlling the extension and contraction of the transportation car and the boom frame 10 is provided according to the state of each sensor.

First, the transport car winch encoder 40 is used to detect the rotational direction and the speed of the rotating body, and can be configured in various forms. However, in the embodiment of the present invention, An encoder rotary plate 41 in which grooves 42 and protrusions 43 are periodically formed on the disk-shaped bracket circumferential surface as shown in FIG. 5A is rotatably supported on the rotary shaft of the transportation car winch unit 12 And two first and second proximity sensors 45 and 45 are provided at the positions close to the groove 42 and the protrusion 43 in the sensor fixing bracket 44 provided to be opposed to the encoder rotation plate 41 ) 46 is provided.

5 (b), the first and second proximity sensors 45 and 46 are arranged in such a manner that when the encoder rotation plate 41 is rotated, While outputting a low-level signal while the groove 42 is passing close to the groove 42, thereby outputting the periodic square wave signal while the encoder rotary plate 41 is rotated. Thus, when a pulse signal is generated by the first and second proximity sensors 45 and 46 by the number of the projections 43 formed on the sensor fixing bracket 44, it can be determined that the winch makes one rotation, And can measure the length of the wire unwound or wound by the car winch unit 12 and can measure the length of the wire wound around the winch with the rotation speed of the winch through the period of the pulse output from the first and second proximity sensors 45, The moving speed of the car can be measured.

Particularly, the first and second proximity sensors 45 and 46 are arranged to output pulses having different phases, for example, a phase difference of 90 degrees as shown in FIG. 5 (b), and the transport car winch unit 12 When the first proximity sensor 45 outputs a signal such as PS1 and the second proximity sensor 46 outputs a signal such as PS2 when the first proximity sensor 45 is rotated in the clockwise direction, The signals of (H, L), (H, H), (L, H), and (L, L) are continuously output in a series of patterns by combining the signals of the square wave pulse signals PS1 and PS2, (H, L), (L, L), (L, L), and (L) by combining the signals of the pair of rectangular wave pulse signals PS1 and PS2 outputted from the first and second proximity sensors, H) are continuously output in a pattern of one unit. Accordingly, when the transport car winch unit 12 is rotated, a pattern in which a pair of combined signals output from the first and second proximity sensors 45 and 46 are periodically output is determined, As shown in FIG.

In the present invention, acquisition signals such as PS3 are generated at the pulse rising points and the pulse falling points of the square wave pulses output from the first and second proximity sensors 45 and 46, It is possible to control the rotation speed and the moving distance of the transportation car by four times the resolution.

Likewise, the boom winch encoder 50 is installed in the same structure as that of the transport car winch encoder 40, so that detailed description is omitted. If the signals output from the two first and second proximity sensors provided in the boom winch encoder 50 are TPS1 and TPS2, respectively, the boom winch encoder 50 outputs a pair of signals of TPS1 and TPS2 The boom winch unit 13 is rotated in the clockwise direction and the boom is pulled out, for example, when the pattern of the boom winch unit 13 is continuously detected as (H, L), (H, H) (H, L), (L, L), and (L, H), the pattern of the pair of signals of TPS1 and TPS2 is continuously detected. ) Is rotated in the counterclockwise direction to determine that the boom is being drawn in. In addition, the number of pulses of TPS1 and TPS2 is counted to determine the draw-in and draw-in lengths of the boom. In particular, signals such as TPS3, which are acquired at the pulse rising points and pulse falling points, respectively, of square waves TPS1 and TPS2, The resolution can be controlled to be four times as long as the length of the unit 13 is determined.

Next, the load sensor 28 detects the load and the operation load of the transportation car winch unit, and when the transportation car 11 reaches the rising point of the upper end of the boom frame 10, To be used as a reference value which can be stopped when the pressure is excessively high.

The conveyance car reference point sensor 29 is a proximity sensor and is used to sense the current position of the car 11 by sensing whether the car 11 has passed or not. 24) and the down stop limit sensor (25). Thus, when stopping the lowering carriage 11, it is controlled so as to stop at a predetermined stopping reference distance set beforehand after passing through the transporting carriage reference point sensor 29. The predetermined stop reference distance is determined at the time of manufacture and stored in the memory 60 of the main controller 30. [ In addition, when the actual carriage 11 is moved up or down while the carriage 11 is stopped, the distance value sensing the moving distance from the stop position to the passing position when passing through the carriage reference point sensor 29, So that the error generated according to the distance variation can be corrected.

That is, by using the signal detected by the transport car winch encoder 40 at the moment when the transport car 11 passes through the transport car reference point sensor 29 in the course of stopping at the lowermost end of the boom frame 10 and loading up the load The distance from the descending stop point of the transporting car 11 to the transporting carriage reference point sensor 29 is measured and compared with the stopping reference distance stored in the main controller 30, It is reflected on the lift distance and corrected. Such correction is repeatedly performed while the transportation car 11 is loaded and the reciprocating motion from the lowermost end to the uppermost end of the boom frame 10, thereby controlling the transportation car 11 to stop at the correct position.

FIG. 4 is an electrical connection diagram of a boom automatic withdrawal apparatus for a ladder car according to an embodiment of the present invention. The main controller 30 includes a boom withdrawal limit sensor 32, which performs the same function as the components of the embodiment shown in FIG. The boom winch encoder 10 and the boom winch unit 13 are connected to each other and the boat winch encoder 40 and the boom winch encoder 50 and the load sensor 28 And a boom automatic withdrawal setting unit 34 are connected to the boom bar 10 and store the withdrawal length of the booms constituting the boom frame 10 and the transport distance measured during the lifting and lowering of the transportation car 11. [ A memory 60 is connected. The main controller 30 receives the signals sensed by the boom lead-out limit sensor 26, the boom seat seating sensor 27 and the carriage carriage reference sensor 29 and transmits them to the car winch unit 12 and the boom winch unit 13).

The main controller 30 senses the length of the boom bar drawn out through the car winch encoder 40 and the boom winch encoder 50 and always stores the length in the memory 60. Even when the car is stopped or is being raised or lowered, Since the current position of the car 11 is always grasped and stored in the memory 60, it is not necessary to reset the length of the drawn boom even if the length of the boom is changed or the ladder is moved. For this purpose, it is preferable that the memory 60 is a nonvolatile memory element having a long-term data storage capability.

Fig. 6 shows a flow chart for explaining a drawing operation of the boom according to the present invention.

First, the user operates the boom automatic withdrawal setting section 34 to select whether to automatically withdraw the boom or manually withdraw the boom.

When the boom manual pull-out mode for manually pulling the boom is selected, the operation of the pull-out lever is stopped when the boom reaches the target point by operating the pull-out lever as in the conventional manner and reaches the target point.

Alternatively, when the boom automatic withdrawal mode is selected, which automatically withdraws the boom, the target withdrawal length of the boom is set. At this time, the target draw-out length of the boom may be a value obtained by using a dedicated distance measuring device such as a laser distance measuring device, a value obtained by using previously recognized information, have.

Thereafter, the boom automatic take-out button 36 is depressed to automatically draw out the boom. At this time, the user can pull the boom up to the target withdrawal length by simply pressing the boom automatic withdrawal button 36 once without holding the withdrawal lever until the boom reaches the target withdrawal length.

That is, when the automatic boom draw-out command is inputted by the operation of the boom automatic take-out button 36, the main controller 30 operates the conveyance car winch unit 12 and the boom winch unit 13 to drive the car winch unit 12, And the wire wound around the boom winch unit 13 are released to draw out the boom.

The encoder rotation plate 41 is rotated and the sensor fixing bracket 44 is rotated as described above in the transport car winch encoder 40 provided in the car car winch unit 12 in accordance with the operation of the car car winch unit 12. [ The first and second proximity sensors 45 and 46 provided in the encoder rotation plate 41 generate a square wave pulse each time the groove 42 and the projection 43 of the encoder rotation plate 41 approach each other.

The square wave pulses generated by the first and second proximity sensors 45 and 46 are input to the main controller 30 and counted and stored in the memory 60. [

Similarly, during the operation of the boom winch unit 13, the boom winch encoder 50 also receives the square wave pulses generated by the first and second proximity sensors to the main controller 30 to generate the square wave pulses generated by the first and second proximity sensors Counts the number of pulses and accumulates them in the memory 60 and stores them.

On the other hand, while the main controller 30 counts and stores the square wave pulses output from the conveying car winch encoder 40 and the boom winch encoder 50, the pair of the first pair of proximity sensors When it is determined that the output pattern of the pulse combination is continuously detected and is different from the previously set pattern, the operation of the conveyance car winch unit 12 and the boom winch unit 13 is stopped and a buzzer or a warning lamp is operated to display a warning .

As described above, the main controller 30 receives from the car winch encoder 40 and the boom winch encoder 50 while the car winch unit 12 and the boom winch unit 13 are operated to draw the boom, And compares the wire length S1 released from the car winch unit 12 with the wire length S2 released from the boom winch unit 13. [

If it is determined that the wire length S1 released from the car winch unit 12 and the wire length S2 released from the boom winch unit 13 are different from each other in the wire length comparison step, It is determined that an abnormality has occurred in the car winch unit 12 or the boom winch unit 13 and the operation of the cargo winch unit 12 and the boom winch unit 13 is stopped and a buzzer or a warning lamp is operated to display a warning.

If it is determined that the wire length S1 released from the car winch unit 12 is the same as the wire length S2 released from the boom winch unit 13 in the wire length comparison step, It is continuously determined whether or not the wire length S2 has reached the target draw-out length SL.

If it is determined that the wire length S1 or the wire length S2 does not reach the target draw-out length SL as described above, the valve is driven so that the car winch unit 12 and the boom winch unit 13 are continuously operated If it is determined that the wire length S1 or the wire length S2 has reached the target draw length SL in this process, the operation of the car winch unit 12 and the boom winch unit 13 is stopped, The drawing operation is completed.

As described above, in the boom automatic take-out apparatus of the ladder car according to the present invention, when the boom is to be automatically drawn out from the ladder, the target draw-out length is inputted and set in advance before the boom is taken out, The length of the boom is determined by detecting the amount of unwinding of the wire unwound from the car winch unit 12 and the boom winch unit 13 according to the operation of the winch unit 13, The boom can be automatically drawn out to the target withdrawal length by comparing the amount of wire loosening so that the user can conveniently and quickly automatically draw the boom to the target withdrawal length by simply pressing the boom automatic withdraw button 36 momentarily .

In addition, by comparing the wire length released from the car winch unit 12 with the wire length released from the boom winch unit 13 while the boom is drawn to the target length, The boom can be automatically drawn out safely.

10 - Boom, 11 - Car,
12 - Car Car Winch Unit, 13 - Boom Winch Unit,
27 - Boom mount detection sensor, 30 - Main controller,
40 - Carriage winch encoder, 41 - Encoder rotating plate,
42-groove, 43-projection,
44 - Sensor fixing bracket, 45,46 - 1st and 2nd proximity sensors,
50 - Boom Winch Encoder, 60 - Memory

Claims (7)

A cargo winch unit for lifting and lowering the car by fixing one end of a wire wound on the winch to the car, A boom winch unit which is fixed to each boom and draws or folds the boom, and a boom mount detection sensor which detects whether or not the boom boom is seated from the upper end of the boom support, characterized in that the number of revolutions of the car winch unit A conveying winch encoder for detecting the amount of unloading of the conveying carwire; A boom winch encoder for detecting the number of revolutions of the boom winch unit and measuring the amount of unloading of the boom wire; A boom automatic withdrawal setting unit for allowing a user to input a target withdrawal length of the boom; A boom automatic withdrawal button to which an automatic withdrawal start signal of the boom is inputted by the user; A basic length of the boom frame and information about a draw-out length per square wave pulse output from the conveyor winch encoder and the boom winch encoder are stored in advance, and the information is output from the conveyor winch encoder and the boom winch encoder A memory for counting and storing the number of square wave pulses; Then, the wire length calculated by counting the number of square wave pulses output from the conveyance car winch encoder and the boom winch encoder is compared with the target draw length of the boom, and the boom is automatically drawn out until it coincides to be drawn out to the target draw length And a main controller for controlling the boom of the ladder car.

The method according to claim 1,
The main controller determines that the boom withdrawal is started when the boom stand detection sensor detects the departure of the boom stand and counts the number of square wave pulses output from the car winch encoder and the boom winch encoder to detect the wire pull amount of each winch Wherein the boom automatic withdrawal device for the boom of the ladder car.
The method according to claim 1,
The main controller counts the number of square wave pulses output from the carrier car winch encoder and the boom winch encoder and compares the amount of wire unwinding of each winch while detecting the amount of wire release of each winch. And a buzzer or a warning lamp is operated to display a warning.
4. The method according to any one of claims 1 to 3,
The conveyor winch encoder or the boom winch encoder is provided so that an encoder rotary plate in which grooves and projections are periodically formed on the disk-shaped bracket circumferential surface is rotated integrally with the rotary shaft on the rotary shaft of the winch unit, Wherein two proximity sensors are arranged to output a rectangular wave pulse having a phase difference of 90 degrees at a position close to the groove and the projection in the sensor fixing bracket.
5. The method of claim 4,
Wherein the main controller is configured to detect the rotational direction of the car winch unit or the boom winch unit according to a pattern in which a pair of pulse signals simultaneously output from the two proximity sensors are periodically output. Withdrawal device.
5. The method of claim 4,
Wherein the main controller is configured to detect the rotational direction of the car winch unit or the boom winch unit according to a pattern in which a pair of pulse signals output from the two proximity sensors are periodically output. Device.
The main controller of claim 4, wherein the main controller extracts a rectangular wave pulse corresponding to a pulse rising point and a pulse falling point of the pulses output from the two proximity sensors, and calculates a wire loosening amount of the car winch unit or the boom winch unit Wherein the control unit is configured to control the automatic boom of the ladder car.
KR1020150071036A 2015-05-21 2015-05-21 Device for automatically extending boom of a boom vehicle KR101647671B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110019806A (en) * 2009-08-21 2011-03-02 김종일 Movable ladder
KR20110032217A (en) 2009-09-22 2011-03-30 주식회사 호룡 Cart load measurement safty device for elevated construction a lodder truck
KR20110112950A (en) 2010-04-08 2011-10-14 강희곤 Ladder auto move control system
KR20130004700A (en) * 2011-07-04 2013-01-14 양건이 Aerial ladder truck
KR20130005905U (en) * 2012-03-30 2013-10-10 고인순 Trolley to carry of ladder truck

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110019806A (en) * 2009-08-21 2011-03-02 김종일 Movable ladder
KR20110032217A (en) 2009-09-22 2011-03-30 주식회사 호룡 Cart load measurement safty device for elevated construction a lodder truck
KR20110112950A (en) 2010-04-08 2011-10-14 강희곤 Ladder auto move control system
KR20130004700A (en) * 2011-07-04 2013-01-14 양건이 Aerial ladder truck
KR20130005905U (en) * 2012-03-30 2013-10-10 고인순 Trolley to carry of ladder truck

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