KR20150122521A - Appratus for preventing overturning of crane - Google Patents

Appratus for preventing overturning of crane Download PDF

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Publication number
KR20150122521A
KR20150122521A KR1020140048883A KR20140048883A KR20150122521A KR 20150122521 A KR20150122521 A KR 20150122521A KR 1020140048883 A KR1020140048883 A KR 1020140048883A KR 20140048883 A KR20140048883 A KR 20140048883A KR 20150122521 A KR20150122521 A KR 20150122521A
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South Korea
Prior art keywords
load
crane
measured value
cylinder
boom
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KR1020140048883A
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Korean (ko)
Inventor
곽중근
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디와이 주식회사
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Priority to KR1020140048883A priority Critical patent/KR20150122521A/en
Publication of KR20150122521A publication Critical patent/KR20150122521A/en

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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
    • B66C23/36—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 mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • 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
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic

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

Abstract

The present invention relates to an apparatus for preventing overturning of a crane. The present invention relates to a rollover preventing apparatus for a rollover of a crane which prevents rollover of a crane having a rollover cylinder for lifting a multi-stage boom capable of extending and contracting, comprising: a rolling sensor for measuring the degree of tilting of the crane; A pitching sensor for measuring the degree of inclination of the crane; When the first measurement value measured by the rolling sensor and measured by the pitching sensor exceeds a predetermined slope limit value, And a control unit for maintaining the hydraulic pressure state of the relief cylinder at the time when the tilt limit value is exceeded.

Figure P1020140048883

Description

[0001] The present invention relates to a crane for preventing overturning of crane,

The present invention relates to a rollover preventive device for a crane, which is provided with a rolling sensor and a pitching sensor so as to prevent the crane from tilting and overturning, and to prevent the crane from being rolled over by the torque generated by the multi- To a rollover prevention device for a crane.

A truck crane is a combination of a boom assembly that is assembled with a multi-stage boom in a truck and is pulled in and out. A hook is fixed to the end of a wire rope by attaching a pulley to a boom assembly to lift a load body having a constant load It is equipment used to move.

Since the operator who manipulates the crane does not know the load of the load body in lifting or moving the object with the crane, the overloaded body may be lifted. In such a case, if overloaded objects over the rated load are lifted, the crane may be damaged or overturned, resulting in property damage and human accidents.

A typical conventional crane includes a cylinder for stretching or shrinking a boom assembly comprising a multi-stage boom, a rising undulating cylinder in a vertical direction of the boom assembly, a length sensor for sensing the length when the boom assembly is retracted, A pressure sensor for sensing the pressure of the relief cylinder, and the like. When lifting the load body, the load of the load body to be lifted is calculated using the length of the boom assembly, the relief angle of the boom assembly by the relief cylinder, and the pressure sensed by the pressure sensor. The operator can compare the load on the load body with the rated load given in the table of rated load tables by hand and confirm that the load does not exceed the rated load.

However, in the conventional crane, when the crane is lifting a load exceeding the rated load or when the load is less than the rated load but the risk is high, there is a problem that it can not be recognized and coped with quickly.

Further, in the conventional crane, when the crane itself is inclined, there is a problem that it can not be recognized and coped with in advance.

Korean Unexamined Patent Publication No. 2005-0121422 (Publication No.)

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a rolling sensor and a pitching sensor, which prevent the crane from tilting and overturning and that the crane is rolled over by the torque generated by the multi- The present invention provides a rollover prevention device for a crane capable of preventing overturning of a crane.

In order to accomplish the above object, according to the present invention, there is provided an apparatus for preventing overturning of a crane, the apparatus comprising: a crane having an undulating cylinder for lifting a multi-stage boom capable of extending and retracting, A rolling sensor for measuring the degree of inclination to the left and right; A pitching sensor for measuring the degree of inclination of the crane; When the first measurement value measured by the rolling sensor and measured by the pitching sensor exceeds a predetermined slope limit value, And a control unit for maintaining the hydraulic pressure state of the relief cylinder at the time when the tilt limit value is exceeded.

The control unit may be configured such that the first torque value at which the relief cylinder pushes up the multi-stage boom is larger than the second torque, which is the sum of the torque value by the multi-stage boom and the torque value by the load body when the load body is suspended from the multi- And when the load of the load calculated by the control unit exceeds a predetermined rated load in accordance with the length of the multi-stage boom and the relief angle of the multi-stage boom, The control unit preferably controls the oil pressure state of the relief cylinder to be maintained as it is.

When the first measured value or the second measured value is smaller than the slope limit value and belongs to a predetermined slope management range, the control unit operates the relief cylinder only in a direction in which the relief angle of the multi- .

In addition, when the load of the load body is smaller than the rated load and belongs to a predetermined load management range, the controller may control the relief cylinder to operate only in a direction in which the relief angle of the multi-stage boom is increased.

In addition, the crane includes a boom cylinder for operating the multi-stage boom, and the control unit controls the boom cylinder to maintain the hydraulic pressure of the boom cylinder when the first measured value or the second measured value exceeds the slope limit value .

When the first measurement value or the second measurement value is smaller than the slope limit value and belongs to a predetermined slope management range period, the control unit controls the boom cylinder to operate the multi- It is preferable to control the boom cylinder to operate only in a direction in which the total length of the multi-stage boom is reduced.

In addition, the crane includes a boom cylinder for operating the multi-stage boom. When the load of the load body calculated by the control unit exceeds the rated load, the control unit maintains the hydraulic state of the boom cylinder .

When the load of the load body calculated by the controller is smaller than the rated load and falls within a predetermined load management range, the control unit controls the multi-stage boom It is preferable to control the boom cylinder to operate only in a direction in which the total length of the boom is reduced.

The crane may include a hook portion coupled to the load body, a wire connected to the hook portion, and a winding device that operates to pull or loosen the wire, wherein the control portion controls the first measurement value or the second When the measured value exceeds the slope limit value, it is preferable to control the winding device so that the load can not be lifted or lowered by the wire.

The crane may include a hook portion coupled to the load body, a wire connected to the hook portion, and a winding device operable to pull or unwind the wire, wherein the first measured value or the second measured value indicates The control unit controls the winding unit to operate only in a direction in which the load is lowered by the wire when the slope is smaller than the slope limit and falls within a predetermined slope management range.

The crane includes a hook portion coupled to the load body, a wire connected to the hook portion, and a winding device operable to pull or unroll the wire, wherein the load of the load body calculated by the control portion When the load exceeds the rated load, the controller preferably controls the winding device so that the load can not be lifted or lowered by the wire.

The crane includes a hook portion coupled to the load body, a wire connected to the hook portion, and a winding device operable to pull or unroll the wire, wherein the load of the load body calculated by the control portion The control unit controls the winding unit to operate only in a direction in which the load is lowered by the wire when the load is smaller than the rated load and belongs to a predetermined load management range.

The crane includes a boom cylinder for operating the multi-stage boom, and 1) when the first measured value or the second measured value is smaller than the slope limit value and belongs to a predetermined slope management range period, or 2 ) When the load of the load calculated by the controller is smaller than the rated load and belongs to a predetermined load management range, the control unit only determines that the relief cylinder and / It is preferable to control the boom cylinder to operate.

The crane includes a hook portion coupled to the load body, a wire connected to the hook portion, and a winding device operable to pull or untie the wire, wherein 1) the first measurement value or the second measurement value Is less than the slope limit value and falls within a predetermined slope management range, or 2) when the load of the load calculated by the controller is smaller than the rated load and belongs to a predetermined load management range, It is preferable that the control unit controls at least one of the relief cylinder, the boom cylinder, or the winding device only in a direction in which the second torque value is reduced.

When the first measured value or the second measured value exceeds the slope limit value or the load of the load calculated by the control unit exceeds the rated load, the control unit generates an overload warning signal .

When the first measurement value or the second measurement value belongs to the inclination management range, the control unit preferably generates a danger warning signal.

In addition, when the load of the load calculated by the controller belongs to the load management range, the controller generates a danger warning signal.

It is also preferable that the display unit displays the first measured value or the second measured value.

It is preferable that the display device further includes a display unit for displaying a load of the load body.

The rollover preventive device for a crane according to the present invention includes a rolling sensor and a pitching sensor to prevent the crane from tilting and overturning and prevent the crane from being rolled over by the torque generated by the multi- Effect.

1 is a side view of a crane vehicle employing the embodiment of the present invention,
Fig. 2 is a drawing showing the main part of Fig. 1,
Fig. 3 is a view showing a state in which the crane vehicle of Fig. 1 is tilted to the left and right,
Fig. 4 is a view showing a state in which the crane vehicle of Fig. 1 is inclined forward and backward,
5 is a block diagram of a rollover prevention device for a crane according to an embodiment of the present invention,
Figs. 6 and 7 are views showing a state before and after shrinkage of the multi-stage boom,
8 and 9 are diagrams showing a state in which the multi-stage boom is lifted by the undulating cylinder,
10 is a view showing a table of rated load according to the boom length and working radius of the multi-stage boom,
11 is a view schematically showing a working radius and a relief angle according to the boom length of the multi-stage boom.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a side view of a crane vehicle employing the embodiment of the present invention, and Fig. 2 is a drawing showing an essential part of Fig. FIG. 3 is a view showing a state in which the crane vehicle of FIG. 1 is tilted to the left and right, and FIG. 4 is a view showing a state where the crane vehicle of FIG. 1 is tilted back and forth. 5 is a block diagram of a rollover preventing device according to an embodiment of the present invention. Figs. 6 and 7 are views showing the state before and after shrinkage of the multi-stage boom, and Figs. 8 and 9 are views showing a state in which the multi-stage boom is lifted by the undulation cylinder. FIG. 10 is a view showing a table of rated load according to the boom length and the working radius of the multi-stage boom, and FIG. 11 is a diagram schematically showing the working radius and the relief angle according to the boom length of the multi-stage boom.

1, the apparatus for preventing rollover of a crane according to the present invention is applied to a crane 10, and the crane 10 is connected to a truck 11 on which the driver is boarding, And a multi-stage boom (12). The multi-stage boom 12 can be extended or contracted as an assembly in which a plurality of booms are overlapped and joined to each other, and the multi-stage boom 12 is lifted or lowered by the undulation cylinder 40. The multi-stage boom (12) is coupled to a column (13) coupled to the truck (11).

Referring to FIGS. 2 and 5, the apparatus for preventing rollover of a crane according to an embodiment of the present invention includes a rolling sensor 20, a pitching sensor 30, and a control unit 70.

The apparatus for preventing rollover of a crane according to an embodiment of the present invention is for preventing rollover of a crane 10 having an undulating cylinder 40 that lifts a multi-stage boom 12 capable of extending and contracting.

The rolling sensor 20 is provided to measure the degree to which the crane 10 is tilted to the left and right. 3, the inclination of the crane 10 to the left and right means that the crane 10 is tilted with respect to the width direction of the crane 10. And the first measured value, which is the degree to which the crane 10 resonates, is measured by the rolling sensor 20.

The pitching sensor 30 is provided to measure the degree to which the crane 10 is tilted back and forth. As shown in FIG. 4, the inclination of the crane 10 means that the front of the crane 10 is lifted or lowered with respect to the longitudinal direction of the crane 10. And the second measured value is measured by the pitching sensor (30), which is the degree to which the crane (10) sounds.

The controller 70 is provided to compare the first measured value or the second measured value with a predetermined slope limit value and to control the relief cylinder 40 according to the result.

Specifically, when the first measured value or the second measured value exceeds a predetermined slope limit value, the control unit 70 determines the hydraulic pressure state of the relief cylinder 40 at a time point exceeding the slope limit value . When the first measured value or the second measured value exceeds the slope limit value, the operation of the relief cylinder 40 is determined, and the horizontal position of the crane 10 in the direction of lowering the front-rear inclination or the left- A re-adjustment operation is performed.

For example, the slope limit value for the first measured value and the slope limit value for the second measured value may be set to 5 degrees, respectively, for preventing overturning of the crane 10 have.

As the predetermined slope limit value is set lower, the effect of preventing the overturning of the crane 10 due to the front / rear or right / left slope of the crane 10 is great. However, since the slope limit value set too low, A problem may be caused that the efficiency is lowered. Therefore, it is preferable to set it to about 5 degrees.

If the first measured value or the second measured value is smaller than the slope limit value but belongs to a predetermined slope management range, the controller 70 determines that the rising angle of the multi- Thereby controlling the relief cylinder 40 to operate.

Like the slope limit value, the predetermined slope management range interval is set in advance by the user. For example, the predetermined slope management range may be a section that is smaller than the inclination limit value of 5 deg. But less than 5 deg. Can be set.

When the first measured value or the second measured value measured by the rolling sensor 20 or the pitching sensor 30 belongs to the inclination management range period, the relief cylinder 40 receives the multi-stage boom 12 And the multi-stage boom 12 is controlled so as not to operate in a direction in which the relief angle is reduced.

This is because when the relief angle of the multi-stage boom 12 is reduced in the inclination management range, the working radius of the multi-stage boom 12 is increased to increase the torque at the end of the multi-stage boom 12, The risk of overturning increases.

Here, the working radius by the multi-stage boom 12 will be described with reference to Figs. 6 to 9. Fig.

6 shows a state in which the relief cylinder 40 is not operated while the multi-stage boom 12 is not stretched. Therefore, the multi-stage boom 12 maintains a horizontal state. In this state, the working radius of the multi-stage boom 12 is given as the length L1 to both ends of the multi-stage boom 12. [ When the multi-stage boom 12 is extended as shown in Fig. 7, the working radius is increased. Since the multi-stage boom 12 of Fig. 7 is kept horizontal, the working radius of the multi-stage boom 12 is increased by the extended length in Fig.

8 shows a case where the relief cylinder 40 is operated and the end of the multi-stage boom 12 is lifted by 45 degrees upward while the multi-stage boom 12 is not stretched. In this state, the working radius of the multi-stage boom 12 is given by multiplying the length to both ends of the multi-stage boom 12 by cos (45). That is, the working radius of the multi-stage boom 12 is given by L2. When the multi-stage boom 12 is extended in a state where the end of the multi-stage boom 12 is lifted by 45 degrees upward as shown in Fig. 9, the working radius of the multi-stage boom 12 is set to cos (45 °).

When the undulation angle of the multi-stage boom 12 is increased by the undulation cylinder 40, it means that the working radius by the multi-stage boom 12 is reduced. By the undulation cylinder 40, 12, the work radius of the multi-stage boom 12 is increased.

When the working radius is increased, the torque value at the end of the multi-stage boom 12 increases. Accordingly, when the first measured value or the second measured value belongs to the slope management range, the controller 70 controls the relief cylinder 40 to operate only in the direction in which the relief angle of the multi-stage boom 12 is increased. .

The control unit 70 calculates the load of the load body lifted or moved by the crane 10 and controls the relief cylinder 40 by comparing the load of the load body with the rated load.

Specifically, the control unit 70 determines that the first torque value that the relief cylinder 40 pushes up the multi-stage boom 12 is greater than the first torque value when the load body is suspended from the multi-stage boom 12 And the second torque value which is the sum of the torque value by the load body and the torque value by the load body is equal to each other. That is, the torque value when the relief cylinder 40 pushes up the multi-stage boom 12 at a predetermined pressure is given by the sum of the torque values by the multi-stage boom 12 itself and the load body, Lt; / RTI >

The rated load is given in accordance with the length of the multi-stage boom (12) and the relief angle of the multi-stage boom (12).

Fig. 10 and Fig. 11 show the rated load and the working radius that the operator of the crane 10 can confirm. For example, as shown in Fig. 10, when the length of the multi-stage boom 12 is 4.9 m and the working radius is 4.9 m, the rated load is 3.9 tons. At this time, The elevation angle of the multi-stage boom 12 is 0 °. That is, when the multi-tiered boom 12 is placed horizontally and its length is 4.9 m, loading of 3.9 tons of load body is an appropriate load.

The control unit 70 controls the oil pressure state of the relief cylinder 40 to be maintained when the load of the load body exceeds a predetermined rated load. If the load of the load body is smaller than the rated load but belongs to a predetermined load management range, the controller 70 controls the relief cylinder 40 only in a direction in which the relief angle of the multi- And controls the relief cylinder 40 so that the relief cylinder 40 is operated.

Similarly to the control of the relief cylinder 40 according to the first measured value or the second measured value, if the load of the load body exceeds the rated load, the undulation angle is not changed by the relief cylinder 40 once Thereby maintaining the hydraulic pressure of the relief cylinder 40 as it is.

However, when the load of the load body belongs to the load management range section, the relief cylinder 40 is operated only in the direction in which the relief angle of the multi-stage boom 12 is increased. That is, the relief cylinder 40 is operated only in a direction in which the torque value applied to the end of the multi-stage boom 12 is reduced, thereby preventing the crane 10 from being rolled over.

The load management range is set in advance, as in the case of the inclination limit value, and may be set to, for example, 90% or more of the rated load to less than 100% of the rated load.

If the first measured value or the second measured value exceeds the slope limit value or the load of the load body calculated by the controller 70 exceeds the rated load, the control unit 70 outputs an overload warning Signal. The overload warning signal can be realized in a form that can be recognized by an operator by a warning sound or a display by a light lamp.

When the first measured value or the second measured value belongs to the inclination management range or when the load of the load calculated by the controller 70 belongs to the load management range period , And generates a danger warning signal indicating the danger. Like the overload warning signal, the danger warning signal can be realized in a form in which the operator can be identified by a warning sound or a display by a light lamp. Of course, it is preferable that the danger warning signal is distinguished from the overload warning signal.

The rollover prevention device for a crane according to the embodiment of the present invention further includes a display unit (80).

The display unit 80 displays the first measured value or the second measured value and the load of the load calculated by the control unit 70. [ The display unit 80 may be configured to display the relief angle of the multi-stage boom 12 by the relief cylinder 40 and the length of the multi-stage boom 12 together.

The apparatus for preventing rollover of a crane according to an embodiment of the present invention includes a boom cylinder 50 having a boom cylinder 50 for operating the boom cylinder 12, .

The control unit 70 controls the boom cylinder 50 based on the first measured value by the rolling sensor 20 and the second measured value by the pitching sensor 30 or by controlling the boom cylinder 50 based on the load of the load body Thereby controlling the boom cylinder 50.

More specifically, the control unit 70 controls the hydraulic pressure of the boom cylinder 50 to be maintained when the first measured value or the second measured value exceeds the slope limit value. When the first measured value or the second measured value exceeds the slope limit value, the operation of the boom cylinder 50 is determined, and the horizontal position of the crane 10 in the direction of lowering the front-rear inclination or the left- A re-adjustment operation is performed. As described above, the tilt limit value is not described in detail.

If the first measured value or the second measured value is smaller than the slope limit value and falls within a predetermined slope management range, the controller 70 determines that the total length of the multi-stage boom 12 is reduced So that the boom cylinder 50 is operated.

The tilt management range section has already been described, and a detailed description thereof will be omitted.

When the first measured value or the second measured value falls within the slope management range, the boom cylinder 50 operates in a direction in which the total length of the multi-stage boom 12 decreases, It is controlled not to operate in the direction in which the total length is increased.

When the total length of the multi-stage boom 12 is increased in the inclination management range, the working radius of the multi-stage boom 12 is increased to increase the torque at the end of the multi-stage boom 12, The boom cylinder 50 is controlled to operate only in a direction in which the total length of the multi-stage boom 12 is reduced in the tilt management range. .

The control unit 70 controls the hydraulic pressure of the boom cylinder 50 to be maintained when the load of the load calculated by the control unit 70 exceeds the rated load. If the load calculated by the controller 70 is smaller than the rated load but falls within a predetermined load management range, the controller 70 determines that the total length of the multi-stage boom 12 is reduced So that the boom cylinder 50 is operated.

The boom cylinder 50 is controlled by the boom cylinder 50 once the load of the load body exceeds the rated load as in the case where the boom cylinder 50 is controlled in accordance with the first measured value or the second measured value. The hydraulic pressure of the boom cylinder 50 is maintained as it is so that the total length does not change.

However, when the load of the load body belongs to the load management range, the boom cylinder 50 is operated only in a direction in which the total length of the multi-stage boom 12 is reduced. That is, the relief cylinder 40 is operated only in a direction in which the torque value applied to the end of the multi-stage boom 12 is reduced, thereby preventing the crane 10 from being rolled over.

In the apparatus for preventing rollover of a crane according to an embodiment of the present invention, the control unit 70 may be implemented to control the undulation cylinder 40 and / or the boom cylinder 50.

Specifically, when the first measured value or the second measured value is smaller than the slope limit value and belongs to a predetermined slope management range, or when the load of the load calculated by the controller 70 is less than the rated load The control unit 70 controls the relief cylinder 40 and / or the boom cylinder 50 to operate only in a direction in which the second torque value is smaller.

Here, the second torque value means the total torque value applied to the end of the multi-stage boom 12 as the sum of the torque value by the load body and the torque value by the multi-stage boom 12 as described above. The control unit 70 controls the undulation cylinder 40 and the boom cylinder 50 together or the boom cylinder 50 and either the undulation cylinder 40 or the boom cylinder 50 Lt; / RTI >

For example, when the first measured value or the second measured value belongs to the slope management range, the relief cylinder 40 is operated only in the direction in which the relief angle of the multi-stage boom 12 is increased, The undulation angle of the multi-stage boom 12 is increased by controlling the undulation cylinder 40 and the boom cylinder 50 together by controlling the operation of the boom cylinder 50 only in the direction in which the length of the multi-stage boom 12 is reduced, The length can be controlled so that the shrinking operation is performed together.

The apparatus for preventing rollover of a crane according to an embodiment of the present invention includes a hook portion 61 coupled with a load body, a wire 62 connected to the hook portion 61, In the crane 10 having the operating winding and the device 60, the winding and the device 60 may be controlled.

The control unit 70 controls the load body to be lifted or lowered using the winding unit 60 based on the first measured value by the rolling sensor 20 and the second measured value by the pitching sensor 30 , And controls the winding (60) based on the load of the load body.

Specifically, when the first measured value or the second measured value exceeds the slope limit value, the control unit 70 controls the winding unit 60 (or 60) so that the load body can not be lifted or lowered by the wire 62 ).

That is, when the first measured value or the second measured value exceeds the slope limit value, the load body hanging on the hook portion 61 of the winding device 60 does not rise or fall, The operation of stopping the operation and resetting the horizontal level of the crane 10 in the direction of lowering the fore and aft inclination or the left and right inclination of the crane 10 is performed. As described above, the tilt limit value is not described in detail.

When the first measured value or the second measured value is smaller than the slope limit value and belongs to a predetermined slope management range, the controller 70 controls the wire 62 to move in a direction in which the load is lowered Thereby controlling the winding and device 60 to operate.

The tilt management range section has already been described, and a detailed description thereof will be omitted.

If the first measured value or the second measured value belongs to the inclination management range, the load body can be lowered by the winding unit 60, but is not raised.

When the load body is lifted further in the tilt management range, the torque at the end of the multi-stage boom 12 increases to increase the risk of overturning of the crane 10. Thus, the controller 70 controls the load body The volume and device 60 are controlled so that they are no longer lifted.

The control unit 70 controls the winding unit 60 so that the load body can be lifted or lowered by the wire 62 when the load of the load body calculated by the control unit 70 exceeds the rated load . If the load calculated by the controller 70 is smaller than the rated load but falls within a predetermined load management range, the controller 70 controls the load 62 to be lowered Thereby controlling the winding and device 60 to operate.

When the load of the load body exceeds the rated load, the load body is once raised or lowered by the winding unit 60, as in the case where the winding unit 60 is controlled in accordance with the first measured value or the second measured value. The operation of the winding device 60 is stopped so as not to descend.

However, when the load of the load belongs to the load management range, only the load and the device (60) are operated in the direction in which the load is lowered. That is, the winding device 60 is operated only in a direction in which the torque value applied to the end of the multi-stage boom 12 is reduced, thereby preventing the crane 10 from being rolled over.

The control unit 70 may be configured to control at least one of the undulation cylinder 40, the boom cylinder 50, and the winding unit 60 according to an embodiment of the present invention. . ≪ / RTI > That is, the control unit 70 controls only one of the undulation cylinder 40, the boom cylinder 50, and the winding unit 60, or controls the undulation cylinder 40, the boom cylinder 50, It is possible to control two or more of the magnets 60 simultaneously.

Specifically, when the first measured value or the second measured value is smaller than the slope limit value and belongs to a predetermined slope management range, or when the load of the load calculated by the controller 70 is less than the rated load The boom cylinder 50 or the winding unit 60 (or 60) can be operated only in a direction in which the second torque value is smaller, ). Here, the second torque value means the total torque value applied to the end of the multi-stage boom 12 as the sum of the torque value by the load body and the torque value by the multi-stage boom 12 as described above.

For example, when the load of the load body belongs to the load management range section, it is possible to operate in the following types 1), 2), or 3).

1) When controlling only one of the relief cylinder 40, the boom cylinder 50, and the winding device 60

It is possible to control the relief cylinder 40 to operate only in a direction in which the relief angle of the multi-stage boom 12 is increased, or to control the operation of the boom cylinder 50 only in a direction in which the total length of the multi-stage boom 12 is reduced, So that the winding 60 is operated only in the downward direction.

2) When two or more of the undulation cylinder 40, the boom cylinder 50, or the winding unit 60 are controlled together

The undulation angle of the multi-stage boom 12 is increased and the total length of the multi-stage boom 12 is reduced by controlling the undulating cylinder 40 and the boom cylinder 50 together, So that the total length of the multi-stage boom 12 is reduced and the height of the load body can be controlled to be low. Of course, other combinations of operations are also possible.

3) When removing both the relief cylinder 40, the boom cylinder 50, and the winding unit 60

The undulation angle of the multi-stage boom 12 is increased, the total length of the multi-stage boom 12 is reduced, and the undulation cylinder 40, the boom cylinder 50, .

The crane rollover prevention apparatus according to the embodiment of the present invention includes the rolling sensor 20 and the pitching sensor 30 so that when the crane 10 has a left or right echo or a fore and aft echo exceeding a slope limit value When the operation of the undulating cylinder 40, the boom cylinder 50, or the winding device 60 is stopped and the left / right echo or fore / aft echo belongs to a predetermined slope management range, Stage boom 12 may be controlled only in a direction in which the relief angle of the multi-stage boom 12 is increased or may be controlled by the boom cylinder 50 to operate only in a direction in which the total length of the multi-stage boom 12 is reduced, So as to operate only in the direction in which the load body is lowered so that the rollover accident of the crane 10 is not performed And provides an effect of holding.

In the case where the right and left ears or the fore and aft ears of the crane 10 belong to the predetermined inclination management range or the load of the load body belongs to the load management range, the relief cylinder 40, the boom cylinder 50 The boom cylinder device 50 and the winding device 60 are operated so as to operate only at the side where the second torque value is smaller, It is possible to reduce the torque value or to operate the undulation cylinder 40, the boom cylinder 50, and the winding device 60 together to reduce the second torque value.

As a result, by controlling the relief cylinder 40, the boom cylinder 50, and the winding device 60 in the direction in which the second torque value is decreased in the slope management range section or the load management range section, In advance.

If the slope of the crane 10 exceeds the slope limit value or the load of the load body exceeds the rated load, the overload warning signal is used to indicate that the slope is in the slope management range or the load management range, Thus, the operator can recognize the dangerous situation in advance and provide an effect to cope with it.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10 ... Crane 11 ... Truck
12 ... multi-stage boom 13 ... column
20 ... Rolling sensor 30 ... Pitching sensor
40 ... undulating cylinder 50 ... boom cylinder
60 ... volume and device 61 ... hook portion
62 ... wire 70 ... control unit
80 ... display

Claims (19)

An overturn prevention device for a crane that prevents overturning of a crane (10) having an upturned cylinder (40) for lifting a stretchable and contractible multi-stage boom (12)
A rolling sensor 20 for measuring the degree of tilting of the crane 10;
A pitching sensor 30 for measuring the degree of inclination of the crane 10;
A first measurement value measured by the rolling sensor 20 which is a degree of the left and right ears of the crane 10 or a second measured value measured by the pitching sensor 30, And a control unit (70) for maintaining the hydraulic pressure state of the relief cylinder (40) when the value exceeds the slope limit value, when the value exceeds the predetermined slope limit value Prevention device. The method according to claim 1,
The control unit 70 determines that the first torque value that the relief cylinder 40 pushes up the multi-stage boom 12 is smaller than the torque value by the multi-stage boom 12 when the load body is suspended from the multi- And a second torque value which is a sum of a torque value of the load body and the second torque value,
When the load of the load calculated by the control unit 70 exceeds a predetermined rated load in accordance with the length of the multi-stage boom 12 and the relief angle of the multi-stage boom 12, So as to maintain the oil pressure state of the relief cylinder (40) as it is. The method according to claim 1,
If the first measured value or the second measured value is smaller than the slope limit value and belongs to a predetermined slope management range, the controller 70 determines that the uplift angle of the multi- And controls the relief cylinder (40) to operate. 3. The method of claim 2,
When the load of the load body is smaller than the rated load and belongs to a predetermined load management range, the control unit 70 determines that the relief cylinder 40 is operated only in the direction in which the relief angle of the multi- So as to prevent the rollover of the crane. The method according to claim 1,
The crane (10) includes a boom cylinder (50) for operating the multi-stage boom (12)
Wherein the control unit (70) controls the hydraulic pressure of the boom cylinder (50) to be maintained when the first measured value or the second measured value exceeds the slope limit value. The method according to claim 1,
The crane (10) includes a boom cylinder (50) for operating the multi-stage boom (12)
When the first measured value or the second measured value is smaller than the slope limit value and belongs to a predetermined slope management range, the controller 70 determines that the total length of the multi-stage boom 12 is decreased only in the direction in which the total length of the multi- And controls the boom cylinder (50) to operate. 3. The method of claim 2,
The crane (10) includes a boom cylinder (50) for operating the multi-stage boom (12)
The control unit (70) controls the hydraulic pressure of the boom cylinder (50) to be maintained when the load of the load calculated by the controller (70) exceeds the rated load. Rollover prevention device. 3. The method of claim 2,
The crane (10) includes a boom cylinder (50) for operating the multi-stage boom (12)
If the load of the load calculated by the controller 70 is smaller than the rated load and belongs to a predetermined load management range, the controller 70 controls the total length of the multi-stage boom 12 in a decreasing direction Wherein the control unit controls the boom cylinder (50) to operate. The method according to claim 1,
The crane 10 includes a hook portion 61 coupled to the load body, a wire 62 connected to the hook portion 61, and a winding device 60 for pulling or pulling the wire 62 ),
The control unit 70 controls the winding device 60 so that the load member can not be lifted or lowered by the wire 62 when the first measured value or the second measured value exceeds the slope limit value Wherein the crane is provided with an overturning prevention device. The method according to claim 1,
The crane 10 includes a hook portion 61 coupled to the load body, a wire 62 connected to the hook portion 61, and a winding device 60 for pulling or pulling the wire 62 ),
When the first measured value or the second measured value is smaller than the slope limit value and belongs to a predetermined slope management range, the controller (70) determines that the load And controls the winding (60) to operate. 3. The method of claim 2,
The crane 10 includes a hook portion 61 coupled to the load body, a wire 62 connected to the hook portion 61, and a winding device 60 for pulling or pulling the wire 62 ),
When the load of the load calculated by the controller 70 exceeds the rated load, the controller 70 controls the winding unit 60 to prevent the load body from being lifted or lowered by the wire 62, Of the crane is controlled. 3. The method of claim 2,
The crane 10 includes a hook portion 61 coupled to the load body, a wire 62 connected to the hook portion 61, and a winding device 60 for pulling or pulling the wire 62 ),
When the load of the load calculated by the controller 70 is smaller than the rated load and belongs to a predetermined load management range, the controller 70 controls the load 62 to be lowered Wherein the control means controls the winding device (60) to operate. 3. The method of claim 2,
The crane (10) includes a boom cylinder (50) for operating the multi-stage boom (12)
1) when the first measured value or the second measured value is smaller than the slope limit value and belongs to a predetermined slope management range period, or
2) If the load of the load calculated by the controller 70 is smaller than the rated load and belongs to a predetermined load management range,
Wherein the control unit (70) controls the undulating cylinder (40) and / or the boom cylinder (50) to operate only at a side where the second torque value is reduced. 14. The method of claim 13,
The crane 10 includes a hook portion 61 coupled to the load body, a wire 62 connected to the hook portion 61, and a winding device 60 for pulling or pulling the wire 62 ),
1) when the first measured value or the second measured value is smaller than the slope limit value and belongs to a predetermined slope management range period, or
2) If the load of the load calculated by the controller 70 is smaller than the rated load and belongs to a predetermined load management range,
The control unit 70 controls at least one of the relief cylinder 40, the boom cylinder 50, or the winding device 60 only at a side where the second torque value is reduced. . 3. The method of claim 2,
If the first measured value or the second measured value exceeds the slope limit value or the load of the load body calculated by the controller 70 exceeds the rated load, And a warning signal is generated. The method of claim 3,
Wherein the control unit (70) generates a danger warning signal when the first measured value or the second measured value belongs to the inclination management range. 5. The method of claim 4,
Wherein the controller (70) generates a danger warning signal when the load of the load calculated by the controller (70) belongs to the load management range. The method according to claim 1,
And a display unit (80) for displaying the first measured value or the second measured value. 3. The method of claim 2,
And a display unit (80) for displaying a load of the load body.
KR1020140048883A 2014-04-23 2014-04-23 Appratus for preventing overturning of crane KR20150122521A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT17596U1 (en) * 2021-05-14 2022-08-15 Palfinger Ag Method for controlling and/or regulating a vehicle-bound hoist

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT17596U1 (en) * 2021-05-14 2022-08-15 Palfinger Ag Method for controlling and/or regulating a vehicle-bound hoist

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