WO2017090688A1 - Dispositif de vérification de l'état de montage de flèche relevable - Google Patents

Dispositif de vérification de l'état de montage de flèche relevable Download PDF

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Publication number
WO2017090688A1
WO2017090688A1 PCT/JP2016/084811 JP2016084811W WO2017090688A1 WO 2017090688 A1 WO2017090688 A1 WO 2017090688A1 JP 2016084811 W JP2016084811 W JP 2016084811W WO 2017090688 A1 WO2017090688 A1 WO 2017090688A1
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WO
WIPO (PCT)
Prior art keywords
tension
luffing jib
jib
ground angle
luffing
Prior art date
Application number
PCT/JP2016/084811
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English (en)
Japanese (ja)
Inventor
洋岳 梶川
基雄 與田
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株式会社タダノ
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Publication of WO2017090688A1 publication Critical patent/WO2017090688A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88—Safety gear

Definitions

  • the present invention relates to a luffing jib assembly state confirmation device.
  • luffing jib is used to increase the working radius in lifting and unloading operations using a crane truck.
  • the luffing jib is attached to the tip of the boom so as to be raised and lowered.
  • This luffing jib is assembled by connecting multiple jibs (divided jibs). There are various types of divided jibs with different lengths in the divided jibs. The operator sets the length of the luffing jib according to the desired work radius. Then, the operator selects a plurality of divided jibs having a length to be used from various types of divided jibs having different lengths so that the set length of the luffing jib is set, and selects the plurality of selected divided jibs. Connect to assemble the luffing jib.
  • the luffing jib is supported on the installation surface via a support roller attached to the tip. After being assembled in a grounded state, the luffing jib is lifted together with the boom and is separated from the installation surface (so-called ground cutting).
  • a luffing jib assembly state confirmation device extended jib length detection device
  • the assembling state confirmation device for luffing jib in Patent Document 1 detects the length of the assembled luffing jib (additional jib), and determines whether or not the detected length of the luffing jib is the set length of the luffing jib.
  • the luffing jib assembly state confirmation device of Patent Document 1 issues an alarm to the operator when the detected length of the luffing jib is different from the set length of the luffing jib. By receiving an alarm, the worker checks whether there is an error in the assembled state of the luffing jib.
  • the operator needs to set the weight of the luffing jib so that it can withstand the weight of the suspended load.
  • the divided jibs there are various types of divided jibs having the same length but different weights.
  • the operator can use different types of divided jibs with the same length but different weights so that the weight of the luffing jib is set to withstand the weight of the suspended load. Select the split jib to use.
  • the assembling state confirmation device for the luffing jib in Patent Document 1 can issue an alarm when the length of the assembled luffing jib is different from the set length, but the weight of the luffing jib is different from the set weight. Even an alarm cannot be issued. That is, when a divided jib having the same length as the divided jib selected by the operator but having a different weight is used, the weight of the assembled luffing jib is different from the set weight.
  • the luffing jib assembly state confirmation device cannot determine the misuse of the divided jib. Therefore, the luffing jib assembly state confirmation device of Patent Document 1 cannot reliably confirm whether or not there is an error in the assembling state of the luffing jib.
  • An object of the present invention is to provide a luffing jib assembly state confirmation device that allows an operator to reliably confirm whether or not there is an error in the assembly state of the luffing jib.
  • the luffing jib assembly state confirmation device of the present invention is An assembly state confirmation device for a luffing jib assembled by connecting a plurality of divided jibs together, and attached to a tip of a boom of a crane truck by a tension link.
  • the calculated tension at a predetermined ground angle of the tension link calculated based on the length and weight of the luffing jib, and the current luffing jib Comparing the actual tension of the tension link when the ground angle becomes the predetermined ground angle, and determining whether the assembling state of the luffing jib is correct or not; Based on the determination result by the tension correctness determination unit, a warning unit that performs a warning operation for an operator, It is characterized by providing.
  • the luffing jib assembly state confirmation device of the present invention can surely confirm whether or not there is an error in the assembling state of the luffing jib.
  • FIG. 1 is a rear view of an all terrain crane 1 (crane vehicle) to which a luffing jib assembly state confirmation device 101 according to a first embodiment of the present invention is applied.
  • the configuration of the all terrain crane 1 will be briefly described.
  • the all terrain crane 1 includes a vehicle body 10 having a traveling function, a swivel base 11 provided on the car body 10 so as to be horizontally turnable, a boom 12 provided on the swivel base 11 so as to be able to undulate, and hoisting at the tip of the boom 12 And a luffing jib 20 attached thereto.
  • Outriggers 13 and 13 are provided on the left and right sides of the front and rear of the vehicle body 10, respectively. Each outrigger 13 is housed in the vehicle body 10 and is configured to project to the side of the vehicle body 10 by hydraulic pressure during work.
  • a machine room (not shown) that houses an engine, a hydraulic pump, and the like is provided at a front portion on the vehicle body 10.
  • a driver's cab (not shown) is provided on the front side of the vehicle body 10.
  • the boom 12 is formed to be extendable and retractable by nesting steel cylinders.
  • a base portion of the boom 12 is rotatably attached to the swivel base 11.
  • a hoisting cylinder 14 is bridged between the boom 12 and the swivel base 11.
  • the hoisting cylinder 14 is configured to expand and contract by hydraulic pressure.
  • the boom 12 is raised and lowered by expansion and contraction of the raising and lowering cylinder 14.
  • each outrigger 13 protrudes sideways and is grounded to the installation surface G. Further, the boom 12 is disposed in a horizontal state with the tip thereof directed to the right of the vehicle body 10.
  • a counterweight 15 is provided on the turntable 11 on the opposite side of the undulation cylinder 14. Further, the swivel base 11 is provided with an operation chamber 16. In the operation chamber 16, there are provided an operation section for performing operations such as turning, undulating and extending the boom 12, extending and retracting the outrigger 13, and starting and stopping the engine.
  • the luffing jib 20 is formed as a lattice jib in which steel materials are assembled in a truss shape.
  • the luffing jib 20 is attached to a bracket 21 attached to the tip of the boom 12 so as to be raised and lowered.
  • the luffing jib 20 is assembled by connecting a plurality of divided jibs (base end jib 20a, first intermediate jib 20b, second intermediate jib 20c, third intermediate jib 20d, fourth intermediate jib 20e, distal jib 20f). It has been. Specifically, the proximal end jib 20a is attached to a rotation shaft (not shown) provided at the distal end portion of the bracket 21 so as to be rotatable in the vertical direction within the plane of FIG.
  • a first intermediate jib 20b, a second intermediate jib 20c, a third intermediate jib 20d, and a fourth intermediate jib 20e are sequentially connected to the distal end portion of the proximal end jib 20a.
  • a tip jib 20f is attached to the fourth intermediate jib 20e.
  • a support roller 22 for supporting the luffing jib 20 on the installation surface G is detachably attached to the tip of the tip jib 20f. The support roller 22 is grounded to the installation surface G before the luffing jib 20 is ground.
  • the plurality of divided jibs 20a to 20f are divided jibs having different lengths.
  • the proximal end jib 20a, the first intermediate jib 20b, the second intermediate jib 20c, the third intermediate jib 20d, and the distal end jib 20f are each a divided jib having one type of weight.
  • the fourth intermediate jib 20e includes two types of fourth intermediate jib 20e having the same length but different weights.
  • the two types of fourth intermediate jib 20e are a lightweight fourth intermediate jib 20e and a heavy weight type fourth intermediate jib 20e. In the luffing jib 20 of the present embodiment, a lightweight fourth intermediate jib 20e is used.
  • 2 types of fourth intermediate jibs 20e having different weights are appropriately selected and used, so that two types of luffing jibs 20 having the same length but different weights can be assembled.
  • the two types of luffing jib 20 are a lightweight luffing jib 20 and a heavy-weight luffing jib 20.
  • the lightweight fourth intermediate jib 20e is used as in the present embodiment, the lightweight luffing jib 20 is obtained.
  • the two types of fourth intermediate jib 20e are appropriately selected so that the assembled luffing jib 20 can withstand the weight of the suspended load.
  • the lightweight fourth intermediate jib 20 when the lightweight fourth intermediate jib 20e is used can withstand the weight of the suspended load, the lightweight fourth intermediate jib 20e is selected. In this case, the heavy weight type fourth intermediate jib 20e is selected.
  • the first mast 25 and the second mast 26 are erected on the back side of the luffing jib 20.
  • the second mast 26 is disposed closer to the boom 12 than the first mast 25 on the proximal end side of the luffing jib 20. More specifically, each of the first mast 25 and the second mast 26 is attached to a rotation shaft (not shown) having one end provided on the bracket 21 so as to be rotatable in the vertical direction within the plane of FIG. It has been.
  • a first tension link 27 is provided between the first mast 25 and the luffing jib 20.
  • a second tension link 28 is provided between the first mast 25 and the second mast 26.
  • the 1st tension link 27 and the 2nd tension link 28 are comprised by the cylinder or rope formed with the thin plate. Further, the first tension link 27 is in a slack state when the luffing jib 20 is grounded to the installation surface G via the support roller 22. Note that the second tension link 28 is in a state of receiving a tension sufficient to support the first mast 25.
  • a holding wire 29 is disposed to hold the luffing jib 20, the first mast 25 and the second mast 26, the first tension link 27 and the second tension link 28 so as to be able to be raised.
  • one end of the holding wire 29 is attached to the tip of the second mast 26.
  • the other end of the holding wire 29 is wound around a holding winch (not shown) provided on the swivel base 11.
  • the holding wire 29 is in a slack state when the luffing jib 20 is grounded to the installation surface G via the support roller 22.
  • the holding winch rotates in the winding direction and winds the holding wire 29, thereby causing the first mast 25 and the second mast 26 and the first tension link 27 and the second tension link 28 to raise the luffing jib 20. It is supposed to be hung up. Further, the holding winch rotates in the feeding direction and feeds the holding wire 29, so that the first mast 25 and the second mast 26 and the first tension link 27 and the second tension link 28 are pushed down and the luffing jib 20 is laid down. It is supposed to let you.
  • FIG. 2 is a block diagram of the luffing jib assembly state confirmation apparatus 101 according to the first embodiment. The structure of the luffing jib assembly state confirmation apparatus 101 will be described with reference to FIG.
  • the luffing jib assembly state confirmation device 101 includes a device main body 110, an input / output unit 120 connected to the input side of the device main body 110, a tension detection unit 130, a ground angle detection unit 140, and a device main body. 110 and a warning unit 150 connected to the output side.
  • the input / output unit 120 is provided in the operation room 16 (see FIG. 1).
  • the input / output unit 120 is configured such that the length of the luffing jib 20 (the entire length of the luffing jib 20) and the weight (the weight of the entire luffing jib 20) can be input. Further, the input / output unit 120 is configured to output an output signal 120 a indicating the length and weight of the luffing jib 20 when the length and weight of the luffing jib 20 are input.
  • the tension detector 130 is already provided at the tip of the first tension link 27 as shown in FIG. 3C, for example.
  • the tension detection unit 130 is configured to detect the actual tension at the tip of the first tension link 27 and output the detected actual tension as a tension detection signal 130a.
  • the first tension link 27 is raised when the luffing jib 20 is lifted by the rising of the boom 12 and is grounded.
  • the ground angle detection unit 140 includes a ground angle calculation unit 143, and a undulation angle detection unit 141 and a tilt angle detection unit 142 connected to the input side of the ground angle calculation unit 143.
  • the undulation angle detection unit 141 is already provided on the boom 12.
  • the undulation angle detector 141 is configured to detect the undulation angle ⁇ 1 (see FIGS. 3B and 3C) of the boom 12 and output the detected undulation angle ⁇ 1 as the undulation angle detection signal 141a.
  • the tilt angle detector 142 is already provided in the luffing jib 20.
  • the tilt angle detector 142 is configured to detect the tilt angle ⁇ 2 (see FIGS. 3B and 3C) of the luffing jib 20 and output the detected tilt angle ⁇ 2 as a tilt angle detection signal 142a.
  • the ground angle calculation unit 143 is provided in the operation room 16 (see FIG. 1).
  • the ground angle calculation unit 143 obtains the undulation angle ⁇ 1 based on the undulation angle detection signal 141 a from the undulation angle detection unit 141, and the tilt angle ⁇ 2 based on the tilt angle detection signal 142 a from the tilt angle detection unit 142. Is configured to get. Further, the ground angle calculation unit 143 is configured to calculate the actual ground angle ⁇ 3 (see FIGS. 3B and 3C) of the luffing jib 20 based on the undulation angle ⁇ 1 and the tilt angle ⁇ 2 .
  • the ground angle calculation unit 143 is configured to calculate the actual ground angle ⁇ 3 by subtracting the tilt angle ⁇ 2 from the undulation angle ⁇ 1 . Furthermore, the ground angle calculation unit 143 is configured to output the calculated actual ground angle ⁇ 3 as the ground angle detection signal 143a.
  • FIG. 3C shows a state in which luffing jib 20 is ground cutting state, that is, the actual ground angle theta 3 becomes ground angle theta R at preset land cutting.
  • the apparatus main body 110 is provided in the operation room 16 (see FIG. 1).
  • the apparatus main body 110 includes a tension acquisition unit 111, a ground angle determination unit 112, and a tension correctness determination unit 113.
  • An input / output unit 120 is connected to the input side of the tension acquisition unit 111.
  • the tension acquisition unit 111 is configured to calculate and obtain the calculated tension of the tip portion of the first tension link 27 based on the output signal 120 a output from the input / output unit 120.
  • Computational tension of the tip portion of the first tension link 27 is a tension generated when the luffing jib 20 is Okoshiossha at ground angle theta R at the earth cutting by Okoshiossha the boom 12.
  • the tension acquisition unit 111 is configured to output the obtained calculated tension as a tension acquisition signal 111a.
  • the calculation on the tension of the tip portion of the first tension link 27 which occurs when the luffing jib 20 is Okoshiossha at ground angle theta R at the earth cutting is obtained by calculating the following equation (1).
  • the gravity acceleration g, the distance L g from the rotation fulcrum a to the center of gravity position b, the ground angle ⁇ R when the roughing jib 20 is grounded, and the vertical line from the rotation fulcrum a of the luffing jib 20 to the first tension link 27 L t (the length of the moment arm) length of time obtained by subtracting the is previously stored in the tension acquisition unit 111.
  • T M ⁇ g ⁇ L g ⁇ cos ⁇ R / L t (1)
  • T tension (N) at the tip of the first tension link 27 (see FIG. 3C)
  • M Weight of the luffing jib 20 (kg)
  • g Gravitational acceleration (9.806 m / s 2 )
  • L g Distance (m) from the rotation fulcrum a of the luffing jib 20 to the gravity center position b (see FIG. 3C)
  • L t Length (m) when a line is drawn vertically from the rotation fulcrum a of the luffing jib 20 to the first tension link 27 (see FIG. 3C)
  • the distance L g from the rotation fulcrum a to the center of gravity position b, the ground angle ⁇ R at the time of ground cutting, and the length L t at the moment correspond to the length and weight of the luffing jib 20. That is, it is set according to a combination of a plurality of divided jibs.
  • the value of each parameter used in Expression (1) is uniquely determined based on the length and weight of the luffing jib 20 input from the input / output unit 120. Therefore, it can be said that the calculated tension at the ground angle ⁇ R when the first tension link 27 is cut is calculated based on the length and weight of the luffing jib 20.
  • the ground angle ⁇ R at the time of ground cutting may be set to an angle at which the roughing jib 20 is reliably grounded because there is a swing width depending on the work even if the length of the luffing jib 20 is the same. preferable.
  • a ground angle calculation unit 143 is connected to the input side of the ground angle determination unit 112.
  • the ground angle determination unit 112 is configured to obtain the actual ground angle ⁇ 3 from the ground angle detection signal 143 a output from the ground angle calculation unit 143.
  • the ground angle determination unit 112 determines that the actual ground angle ⁇ 3 obtained from the ground angle detection signal 143a is a predetermined ground angle ⁇ R at the time of ground cutting (read according to the length of the luffing jib 20). It is configured to determine whether or not it is within a predetermined angle range with reference to. Furthermore, ground angle determining unit 112, when the actual ground angle theta 3, certain ground angle theta R at preset land cut within the predetermined range based on, allow the use of the tension detection signal 130a The use permission signal 112a is output.
  • the reason for setting the predetermined range is as follows. Since the actual ground angle ⁇ 3 includes a detection error, even if the actual ground angle ⁇ 3 matches the preset ground angle ⁇ R , the actual ground angle ⁇ 3 does not actually match. Therefore, a predetermined range is set to allow an error. This predetermined range is set in advance by experiments.
  • a tension detector 130, a tension acquisition unit 111, and a ground angle determination unit 112 are connected to the input side of the tension correctness determination unit 113.
  • the tension correctness determination unit 113 is configured to obtain the calculated tension of the tip portion of the first tension link 27 based on the tension acquisition signal 111 a output from the tension acquisition unit 111. Tension on this calculation, a tension generated when the luffing jib 20 is Okoshiossha at ground angle theta R at the earth cutting. Further, the tension correctness / incorrectness determination unit 113 determines whether or not the tension detection signal 130a output from the tension detection unit 130 can be used based on the use permission signal 112a output from the ground angle determination unit 112.
  • the tension correctness / incorrectness determination unit 113 is configured to obtain the actual tension of the tip portion of the first tension link 27 based on the tension detection signal 130a when the use of the tension detection signal 130a is permitted.
  • the actual tension is the tension that occurs when the luffing jib 20 is Okoshiossha at ground angle theta 3 during land cutting shown in Figure 3C.
  • the tension correctness / incorrectness determination unit 113 determines whether or not the actual tension at the distal end portion of the first tension link 27 obtained from the tension detection signal 130a is within a predetermined tension range based on the calculated tension. It is configured to judge. Further, the tension correctness determination unit 113, when the actual tension of the tip portion of the first tension link 27 obtained from the tension detection signal 130a is not within a predetermined tension range based on the calculated tension, It is configured to output a control signal 113a for performing a warning operation.
  • the reason for setting the predetermined range is as follows. Since the actual tension includes a detection error, even if the actual tension matches the calculated tension, the actual tension does not actually match. Therefore, a predetermined range is set to allow an error. This predetermined range is set in advance by experiments.
  • a tension correctness determination unit 113 is connected to the input side of the warning unit 150.
  • the warning unit 150 is provided in the operation room 16 (see FIG. 1).
  • the warning unit 150 is configured to perform lighting that is a warning operation for the worker based on the control signal 113 a output from the tension correctness determination unit 113.
  • the worker sets the length of the luffing jib 20 according to the desired work radius.
  • the operator selects a plurality of divided jibs to be used for assembling the luffing jib 20 from various types of divided jibs having different lengths. More specifically, the operator selects the plurality of divided jibs 20a to 20f so that the total length of the plurality of divided jibs is equal to the set length of the luffing jib 20.
  • the operator sets the weight of the luffing jib 20 to a lighter one in consideration of performing a relatively light lifting work and suppressing the load on the vehicle body 10 by the luffing jib 20.
  • the worker selects the light-weight luffing jib 20 as the luffing jib 20 to be used. Therefore, the worker can reduce the weight of the light weight type fourth intermediate jib 20e and the light weight type fourth intermediate jib 20e so that the total weight of the plurality of divided jibs becomes the weight of the light weight type luffing jib 20.
  • the fourth intermediate jib 20e of the mold is selected.
  • the luffing jib 20 has two types, a lightweight type and a heavy type.
  • the operator selects the light-weight luffing jib 20 in consideration of suppressing the load on the vehicle body 10 by the luffing jib 20. That is, the lightweight fourth intermediate jib 20e is selected from the two types of fourth intermediate jib 20e. If the lightweight luffing jib 20 cannot withstand the weight of the suspended load, the heavy weight fourth intermediate jib 20e is selected.
  • the configuration pattern of the luffing jib 20 obtained by combining a plurality of divided jibs having different lengths and / or weights is presented to the worker in a manner in which the length and weight of the luffing jib 20 can be grasped, and from among them
  • the operator may select a desired configuration pattern.
  • the divided jibs included in the selected configuration pattern are used without the operator individually selecting the divided jibs to be used.
  • the operator attaches the proximal end jib 20a to the rotation shaft provided at the distal end portion of the bracket 21. Subsequently, the operator sequentially connects the first intermediate jib 20b, the second intermediate jib 20c, the third intermediate jib 20d, and the lightweight fourth intermediate jib 20e to the distal end portion of the proximal end jib 20a. Finally, the operator attaches the tip jib 20f to the lightweight fourth intermediate jib 20e. In this way, the luffing jib 20 is assembled.
  • the length and weight of the luffing jib 20 to be assembled are preset by the operator.
  • the input / output unit 120 outputs an output signal 120 a indicating the length and weight of the luffing jib 20 to the tension acquisition unit 111.
  • the calculated tension of the tip portion of the one tension link 27 is calculated.
  • the tension acquisition unit 111 calculates a calculated tension at the time of ground cutting based on the input length and weight of the luffing jib 20. Further, the tension acquisition unit 111 outputs the obtained calculated tension to the tension correctness determination unit 113 as a tension acquisition signal 111a.
  • the input operation of the length and weight of the luffing jib 20 at the input / output unit 120 may be performed either before or after the assembly of the luffing jib 20.
  • the tension detection unit 130 detects the actual tension at the tip portion of the first tension link 27 and outputs a tension detection signal 130 a indicating the actual tension to the tension correctness determination unit 113.
  • the undulation angle detection unit 141 detects the undulation angle ⁇ 1 of the boom 12 and outputs a undulation angle detection signal 141 a to the ground angle calculation unit 143.
  • the tilt angle detection unit 142 detects the tilt angle ⁇ 2 of the luffing jib 20 and outputs a tilt angle detection signal 142 a to the ground angle calculation unit 143.
  • Ground angle calculating unit 143 obtains the derricking angle theta 1 from derricking angle detection signal 141a, to obtain a tilt angle theta 2 from the tilt angle detection signal 142a.
  • the ground angle calculation unit 143 calculates the actual ground angle ⁇ 3 of the luffing jib 20 by subtracting the tilt angle ⁇ 2 from the undulation angle ⁇ 1 and outputs the ground angle detection signal 143 a to the ground angle determination unit 112. .
  • the ground angle determination unit 112 obtains the actual ground angle ⁇ 3 of the luffing jib 20 from the ground angle detection signal 143a. Next, the ground angle determination unit 112 determines whether or not the actual ground angle ⁇ 3 is within a predetermined range based on a preset ground angle ⁇ R at the time of ground cutting. Ground angle determination unit 112, the actual ground angle theta 3, if within a predetermined range relative to the ground angle theta R at the earth cutting outputs a use permission signal 112a to the tension validation checking unit 113 .
  • Tension validation checking unit 113 from the tension obtained signal 111a, to obtain a first tension on the calculation of the tip portion of the tension link 27, which occurs when the luffing jib 20 is Okoshiossha at ground angle theta R at the earth cutting. Further, the tension correctness / incorrectness determination unit 113 obtains the actual tension of the tip portion of the first tension link 27 when the luffing jib 20 is grounded from the tension detection signal 130a based on the use permission signal 112a. Further, the tension correctness determination unit 113 determines that the actual tension at the tip portion of the first tension link 27 when the luffing jib 20 is ground obtained from the tension detection signal 130a is within a predetermined range based on the calculated tension.
  • the tension correctness determination unit 113 outputs the control signal 113a. Output to the warning unit 150. As a result, the warning unit 150 is turned on.
  • the worker checks whether there is an error in the assembly state of the luffing jib 20 (length and weight of the luffing jib 20). More specifically, the operator checks whether or not each divided jib 20a to 20f is the selected divided jib 20a to 20f. At this time, the operator may check the divided jibs 20a to 20f by grounding the luffing jib 20 to the installation surface G.
  • the operator erroneously inputs the length and weight of the luffing jib 20. Judge. Therefore, the operator inputs the length and weight of the luffing jib 20 to the input / output unit 120 again.
  • the luffing jib assembly state confirmation device 101 determines again whether or not the actual tension at the tip portion of the first tension link 27 when the luffing jib 20 is cut is within a predetermined range.
  • the operator confirms that the length and weight of the assembled luffing jib 20 are as set, that is, the assembled state of the luffing jib 20 is normal. Proceed to the lifting work.
  • each divided jib 20a to 20f if the worker has a divided jib different from the selected divided jib in each divided jib 20a to 20f, the worker selects the divided jib as the selected divided jib. And reassemble the luffing jib 20. For example, when the first intermediate jib 20b having a different length is used for the first intermediate jib 20b, the operator replaces the first intermediate jib 20b with the selected first intermediate jib 20b.
  • the operator reassembles the luffing jib 20 using the replaced first intermediate jib 20b and the other divided jibs 20a, 20c to 20f. Further, for example, when the heavy-weight fourth intermediate jib 20e is used for the fourth intermediate jib 20e, the operator replaces the heavy-weight fourth intermediate jib 20e with the lightweight fourth intermediate jib 20e. Subsequently, the operator reassembles the luffing jib 20 using the replaced lightweight fourth intermediate jib 20e and the other divided jibs 20a to 20d and 20f.
  • the operator inputs the length and weight of the luffing jib 20 to the input / output unit 120 after assembling the luffing jib 20 again.
  • the luffing jib assembly state confirmation device 101 determines again whether or not the actual tension at the tip portion of the first tension link 27 when the luffing jib 20 is cut is within a predetermined range. If the warning unit 150 does not light as a result of the determination, the operator confirms that the length and weight of the assembled luffing jib 20 are as set, that is, the assembled state of the luffing jib 20 is normal. Proceed to the lifting work.
  • the luffing jib assembly state confirmation device 101 includes the input / output unit 120, the tension acquisition unit 111, the tension detection unit 130, the ground angle detection unit 140, and the ground angle determination. Unit 112, tension correctness determination unit 113, and warning unit 150.
  • it is determined whether the correct tension is generated based on the input length and weight of the luffing jib 20, and the leading end of the first tension link 27 is determined.
  • the warning unit 150 is turned on.
  • the tension of the first tension link 27 is generated by raising the luffing jib 20, it corresponds to the length and weight of the luffing jib 20 (see formula (1)). That is, if at least one of the length and weight of the luffing jib 20 is different, the tension generated in the first tension link 27 is also different. Usually, the tension of the first tension link 27 increases as the length and weight of the luffing jib 20 increase. Therefore, the luffing jib assembly state confirmation device 101 of the first embodiment performs a warning operation based on the actual tension of the first tension link 27, so that there is an error in the length of the assembled luffing jib 20. It becomes possible to inform the operator of whether or not.
  • the luffing jib assembly state confirmation device 101 performs a warning operation based on the actual tension of the first tension link 27, so that there is an error in the weight of the assembled luffing jib 20. It becomes possible to inform the operator of whether or not. Therefore, the luffing jib assembly state confirmation device 101 of the first embodiment can surely confirm whether or not there is an error in the assembly state of the luffing jib 20. Further, the luffing jib assembly state confirmation device 101 of the first embodiment can prevent the lifting work and the hanging work from being performed in a state where the luffing jib 20 is assembled by mistake.
  • the actual tension Compare the calculated tensions. That is, the tension acquisition unit 111 so as to obtain a tension on the calculation of the first tension link 27 when the luffing jib 20 is Okoshiossha at ground angle theta R at the earth cutting.
  • ground angle determination unit 112 ground angle detection signal 143a from the actual resulting ground angle theta 3 is whether the ground angle theta R at preset land cut within the predetermined range on the basis
  • the use permission signal 112a is output when the value is within the predetermined range.
  • the tension correctness / incorrectness determination unit 113 determines whether or not the actual tension of the first tension link 27 is within a predetermined range when the luffing jib 20 is ground, and outputs the control signal 113a when it is not within the predetermined range.
  • the warning unit 150 can be turned on by outputting. Therefore, the luffing jib assembly state confirmation device 101 according to the first embodiment can promptly and reliably confirm whether or not there is an error in the assembly state of the luffing jib 20.
  • the tension detecting unit 130 for detecting the actual tension of the first tension link 27 is already provided in the first tension link 27.
  • the luffing jib assembly state confirmation apparatus 101 of the first embodiment can reduce the cost and allow the operator to reliably confirm whether or not there is an error in the assembly state of the luffing jib 20.
  • the ground angle detection unit 140 includes the undulation angle detection unit 141 already installed on the boom 12 and the tilt already installed on the luffing jib 20.
  • An angle detection unit 142 and a ground angle calculation unit 143 that calculates an actual ground angle ⁇ 3 of the luffing jib 20 based on detection results of the undulation angle detection unit 141 and the tilt angle detection unit 142 are provided. That is, in the luffing jib assembly state confirmation device 101 of the first embodiment, the ground angle detection unit 140 uses the undulation angle detection unit 141 and the tilt angle detection unit 142 that are already installed in the all terrain crane 1.
  • the luffing jib assembly state confirmation device 101 can further reduce the cost and allow the operator to reliably confirm whether or not there is an error in the assembly state of the luffing jib 20.
  • the tension acquisition unit 111 uses the first tension link 27 to calculate the calculated tension of the tip portion located on the tip side of the luffing jib 20. I tried to get it.
  • the tension detector 130 detects the actual tension at the tip of the first tension link 27.
  • the tip portion of the first tension link 27 is separated from members other than the luffing jib 20 (first mast 25, second mast 26, etc.). Therefore, the actual tension at the tip portion of the first tension link 27 detected by the tension detector 130 is not easily affected by the tension due to the length and weight of members other than the luffing jib 20.
  • the tension correctness determination unit 113 compares the actual tension of the first tension link 27 with high accuracy with the calculated tension, so whether or not the actual tension is within a predetermined range. It becomes possible to increase the accuracy of judgment. Accordingly, the warning unit 150 can improve the accuracy of the warning operation. Therefore, the luffing jib assembly state confirmation device 101 of the first embodiment can surely confirm whether or not there is an error in the assembly state of the luffing jib 20 by an operator.
  • FIG. 4 is a block diagram of the luffing jib assembly state confirmation device 201 according to the second embodiment of the present invention.
  • the luffing jib assembly state confirmation device 201 of the second embodiment is provided in the all-terrain crane 1 in the same manner as the luffing jib assembly state confirmation device 101 of the first embodiment.
  • the same parts as those in the luffing jib assembly state confirmation device 101 of the first embodiment are denoted by the same reference numerals, and different portions will be mainly described. .
  • the ground angle detection unit 240 of the luffing jib assembly state confirmation device 201 according to the second embodiment is already provided on at least one of the boom 12 and the luffing jib 20.
  • the ground angle detecting unit 240 is configured to output the ground angle detection signal 240a detects the actual ground angle theta 3 of the luffing jib 20. For this reason, the assembling state confirmation device 201 for the luffing jib according to the second embodiment does not require a new ground angle detection unit, so the cost for the ground angle detection unit 240 can be reduced.
  • the luffing jib assembly state confirmation device 201 can reduce the cost and allow the operator to reliably confirm whether or not there is an error in the assembly state of the luffing jib 20. Since other effects are the same as those described in the first embodiment, a description thereof will be omitted.
  • the luffing jib assembly state confirmation devices 101 and 201 are assembled by connecting the plurality of divided jibs 20a to 20f, and the tip of the boom 12 of the crane truck is assembled.
  • the assembled state of the luffing jib 20 attached to the first tension link 27 so as to be raised and lowered is confirmed.
  • the assembly state confirmation devices 101 and 201 are configured so that the leading edge of the first tension link 27 is calculated based on the length and weight of the luffing jib 20 after the leading end of the luffing jib 20 shifts from the grounding state to the ground cutting state.
  • the tension correctness determination unit 113 that determines whether the assembly state of the luffing jib 20 is correct and 113, and the warning unit 150 that performs a warning operation to the operator based on the determination result by the tension correctness determination unit 113, Prepare.
  • the worker can be surely confirmed whether or not the assembly state of the luffing jib 20, that is, whether or not there is an error in the combination of the divided jib 20. More specifically, this can be determined when at least one of the length and weight of the luffing jib 20 is different from that set by the operator. In particular, even in the case where some of the plurality of divided jibs 20 have the same length but different weights, the assembly state confirmation devices 101 and 201 can reliably determine their misuse. .
  • the warning unit 150 of both embodiments is configured to give a warning by turning on as an example of a warning operation.
  • the warning unit 150 blinks in addition to lighting up, sounds a warning sound, A warning may be issued by stopping the engine of the crane 1.
  • the weight of the luffing jib 20 input to the input / output unit 120 is the weight of the luffing jib 20 as a whole.
  • the weight of the luffing jib 20 input to the input / output unit 120 is not limited to the total weight of the luffing jib 20.
  • the weight of the luffing jib 20 input to the input / output unit 120 may be the weight of each divided jib 20a to 20f.
  • the input / output unit 120 adds the weights of the input divided jibs 20a to 20f to the weight of the entire luffing jib 20, and outputs the result as an output signal 120a.
  • the tension acquisition unit 111 calculates the first tension link 27 based on the output signal 120a indicating the length and weight of the luffing jib 20. The tension was calculated and obtained.
  • the configuration in which the tension acquisition unit 111 obtains the calculated tension is not limited to the configuration obtained by calculation.
  • the tension acquisition unit 111 and the input / output unit 120 may be configured as follows.
  • the input / output unit 120 is input with the weight type of the luffing jib 20 (light weight type or heavy weight type) as the weight of the luffing jib 20.
  • the tension acquisition unit 111 stores in advance the calculated tensions of the plurality of first tension links 27 corresponding to the length of the luffing jib 20 and the type of the weight of the luffing jib 20. Further, the tension acquisition unit 111 responds from the calculated tensions of the plurality of first tension links 27 stored in advance based on the output signal 120a of the length and weight (weight type) of the luffing jib 20. The tension is called and output as a tension acquisition signal 111a.
  • the tension detecting unit 130 is already provided at the distal end portion of the first tension link 27, but portions other than the distal end portion of the first tension link 27 are provided.
  • the tension detector 130 may be provided.
  • the tension detector 130 may be provided in the second tension link 28.
  • the actual tension when the actual ground angle ⁇ 3 becomes the ground angle ⁇ R at the time of earth cutting is compared with the calculated tension, but the actual ground angle ⁇ 3 is compared with that at the time of earth cutting.
  • ground angle ⁇ given ground angle other than R (However, except for the ground angle of the previous earth-cutting) in the case of a, it may be subjected to a comparison of tension.
  • the predetermined ground angle may be set to the same value regardless of the length of the luffing jib 20 (for example, the ground angle when the luffing jib 20 is the maximum length).
  • the luffing jib assembly state confirmation devices 101 and 201 are applied to the all-terrain crane 1.
  • the crane vehicle to which the luffing jib assembly state confirmation devices 101 and 201 are applied is not limited to the all-terrain crane 1, and may be any crane vehicle in which the luffing jib is attached to the tip of the boom.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Jib Cranes (AREA)

Abstract

L'invention concerne un dispositif pour vérifier l'état de montage d'une flèche relevable moyennant quoi il est possible pour un opérateur de confirmer de façon fiable s'il y a une erreur dans l'état de montage d'une flèche relevable. Ce dispositif permettant de confirmer l'état de montage d'une flèche relevable, dans lequel une pluralité de flèches séparées sont reliées les unes aux autres et sont fixées par un maillon de tension à l'extrémité distale d'un bras d'une grue de façon à pouvoir monter et descendre, le dispositif permettant de confirmer l'état de montage d'une flèche relevable étant pourvu : d'une unité de détermination de justesse de tension pour déterminer si l'état de montage de la flèche relevable est correct en comparant la tension calculée à un angle prescrit au sol du maillon de tension tel que calculé sur la base de la hauteur et du poids de la flèche relevable après que l'extrémité distale de la flèche relevable est passé d'un état au sol à un état relevé, et la tension réelle du maillon de tension lorsque l'angle au sol actuel de la flèche relevable a atteint l'angle au sol prescrit ; et d'une unité d'alerte pour émettre une alerte à l'attention d'un opérateur sur la base du résultat de la détermination par l'unité de détermination de justesse de tension.
PCT/JP2016/084811 2015-11-26 2016-11-24 Dispositif de vérification de l'état de montage de flèche relevable WO2017090688A1 (fr)

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JP2015230922A JP2019031340A (ja) 2015-11-26 2015-11-26 ラフィングジブの組み立て状態確認装置
JP2015-230922 2015-11-26

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US10633227B2 (en) * 2017-06-05 2020-04-28 Kobelco Construction Machinery Co., Ltd. Method for raising strut, and crane
CN113562635A (zh) * 2021-09-26 2021-10-29 徐工集团工程机械股份有限公司建设机械分公司 起重机以及起重机起臂方法
WO2023087439A1 (fr) * 2021-11-19 2023-05-25 徐州建机工程机械有限公司 Procédé, système et dispositif de commande pour grue à tour à amplitude variable à levage multiple et support de stockage

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JP7126981B2 (ja) * 2019-03-29 2022-08-29 住友重機械建機クレーン株式会社 クレーン

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JP2005194086A (ja) * 2004-01-09 2005-07-21 Kobelco Cranes Co Ltd 移動式クレーン及びその組立・分解方法
JP2011121753A (ja) * 2009-12-11 2011-06-23 Tadano Ltd ブーム付き作業機におけるブームの撓み抑制装置
CN102491204A (zh) * 2011-12-23 2012-06-13 上海三一科技有限公司 履带起重机辅助起臂装置及起臂方法及包括该装置的起重机
JP2014073892A (ja) * 2012-10-03 2014-04-24 Hitachi Sumitomo Heavy Industries Construction Crane Co Ltd クレーン

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JP2005194086A (ja) * 2004-01-09 2005-07-21 Kobelco Cranes Co Ltd 移動式クレーン及びその組立・分解方法
JP2011121753A (ja) * 2009-12-11 2011-06-23 Tadano Ltd ブーム付き作業機におけるブームの撓み抑制装置
CN102491204A (zh) * 2011-12-23 2012-06-13 上海三一科技有限公司 履带起重机辅助起臂装置及起臂方法及包括该装置的起重机
JP2014073892A (ja) * 2012-10-03 2014-04-24 Hitachi Sumitomo Heavy Industries Construction Crane Co Ltd クレーン

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10633227B2 (en) * 2017-06-05 2020-04-28 Kobelco Construction Machinery Co., Ltd. Method for raising strut, and crane
CN113562635A (zh) * 2021-09-26 2021-10-29 徐工集团工程机械股份有限公司建设机械分公司 起重机以及起重机起臂方法
WO2023087439A1 (fr) * 2021-11-19 2023-05-25 徐州建机工程机械有限公司 Procédé, système et dispositif de commande pour grue à tour à amplitude variable à levage multiple et support de stockage

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