KR20150122521A - Appratus for preventing overturning of crane - Google Patents
Appratus for preventing overturning of crane Download PDFInfo
- 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
- Prior art date
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Classifications
-
- 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.
Description
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.
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
Referring to FIGS. 2 and 5, the apparatus for preventing rollover of a crane according to an embodiment of the present invention includes a
The apparatus for preventing rollover of a crane according to an embodiment of the present invention is for preventing rollover of a
The
The
The
Specifically, when the first measured value or the second measured value exceeds a predetermined slope limit value, the
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
As the predetermined slope limit value is set lower, the effect of preventing the overturning of the
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
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
This is because when the relief angle of the
Here, the working radius by the
6 shows a state in which the
8 shows a case where the
When the undulation angle of the
When the working radius is increased, the torque value at the end of the
The
Specifically, the
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
The
Similarly to the control of the
However, when the load of the load body belongs to the load management range section, the
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
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
The rollover prevention device for a crane according to the embodiment of the present invention further includes a display unit (80).
The
The apparatus for preventing rollover of a crane according to an embodiment of the present invention includes a
The
More specifically, the
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
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
When the total length of the
The
The
However, when the load of the load body belongs to the load management range, the
In the apparatus for preventing rollover of a crane according to an embodiment of the present invention, the
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
Here, the second torque value means the total torque value applied to the end of the
For example, when the first measured value or the second measured value belongs to the slope management range, the
The apparatus for preventing rollover of a crane according to an embodiment of the present invention includes a
The
Specifically, when the first measured value or the second measured value exceeds the slope limit value, the
That is, when the first measured value or the second measured value exceeds the slope limit value, the load body hanging on the
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
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
When the load body is lifted further in the tilt management range, the torque at the end of the
The
When the load of the load body exceeds the rated load, the load body is once raised or lowered by the winding
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
The
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
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
It is possible to control the
2) When two or more of the
The undulation angle of the
3) When removing both the
The undulation angle of the
The crane rollover prevention apparatus according to the embodiment of the present invention includes the rolling
In the case where the right and left ears or the fore and aft ears of the
As a result, by controlling the
If the slope of the
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 ...
12 ...
20 ... Rolling
40 ... undulating
60 ... volume and
62 ...
80 ... display
Claims (19)
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 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.
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.
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 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 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.
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.
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 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 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.
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.
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.
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.
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. .
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.
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.
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.
And a display unit (80) for displaying the first measured value or the second measured value.
And a display unit (80) for displaying a load of the load body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020140048883A KR20150122521A (en) | 2014-04-23 | 2014-04-23 | Appratus for preventing overturning of crane |
Applications Claiming Priority (1)
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KR1020140048883A KR20150122521A (en) | 2014-04-23 | 2014-04-23 | Appratus for preventing overturning of crane |
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KR20150122521A true KR20150122521A (en) | 2015-11-02 |
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KR1020140048883A KR20150122521A (en) | 2014-04-23 | 2014-04-23 | Appratus for preventing overturning of crane |
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Cited By (1)
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 |
-
2014
- 2014-04-23 KR KR1020140048883A patent/KR20150122521A/en not_active Application Discontinuation
Cited By (1)
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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