JPH022797B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to hoisting and transporting machines, and more particularly to a device for protecting hoisting mechanisms from overload and tilting.

The invention disclosed herein can be used to protect boom self-propelled hydraulic cranes having pneumatically operated wheel drives.

[Conventional technology and its problems]

A device is known for protecting the hoisting mechanism against overload and tilting, comprising a hoisting mechanism overload detector and a hoisting mechanism cut-out device electrically connected to the hoisting mechanism overload detector (USSR). (See Inventor Certificate No. 1101402).

However, the device is a hoisting mechanism such as a crane (which is most suitable from the point of view of its external shape)
is adjusted to the nominal support contour of This reduces the accuracy of the device and thereby impairs the reliability of the protection of the winding mechanism, which may result in damage to the winding mechanism.

Additionally, in that conventional device, the overload detector of the hoisting mechanism corresponds to the minimum load capacity (relative to the rated support contour) (taking into account wind impact, platform inclination angle, strength conditions of the individual units, etc.) Program the load characteristics to be used. This almost always results in the use of the hoisting mechanism at a capacity lower than its actual capacity.

[Means for solving the problems] The purpose of the present invention is to increase the accuracy of the device;
The object of the present invention is to obtain a device for protecting the hoisting mechanism against overloads and tilting, with additional devices that make it possible to extend the functional possibilities and to improve the hoisting mechanism protection device.

This purpose is to provide a device for protecting a hoisting mechanism against overload and tilting, comprising a hoisting mechanism overload detector and a hoisting mechanism cut-out device electrically connected to the hoisting mechanism overload detector. and a winding mechanism protection pattern selector electrically connected in series with the winding mechanism actual stability monitor, the other input terminal of said winding mechanism protection pattern selector. is electrically connected to a winding mechanism overload detector, and the output terminal of said winding mechanism protection pattern selector is achieved by means of a device for protecting the winding mechanism against overload and tilting connected to a winding mechanism cutout device. Ru.

In a device for protecting a winding mechanism against overloads and tilting, it is convenient to use orlogic as a winding mechanism protection pattern selector.

Further, the device for protecting the hoisting mechanism against overload and tilting includes a basic andlogic, an additional andology, an inverter, and a hoisting mechanism boom angle data transmitter, and an input terminal of the andlogic is connected to the hoisting mechanism. is electrically connected to an overload detector, the input terminal of said andlogic is electrically connected to the actual stability monitor of the hoisting mechanism, and the output terminal of said basic andlogic and the output terminal of said additional andlogic are The output terminal of said inverter is connected to the other input terminal of the additional and logic, and the output terminal of the hoisting mechanism boom angle data transmitter is connected to the input terminal of the inverter and the other input terminal of the basic and logic. It is a good idea to do so.

The present invention monitors the condition of the crane support profile.
This increases the accuracy of the device and the reliability of the winding mechanism protection device.

The invention also makes it possible to detect overloads and to monitor the actual stability of the hoisting mechanism, thereby expanding the functional possibilities of the device.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

The device according to the invention for protecting a hoisting mechanism against overloads and tilting comprises a hoisting mechanism overload detector 1 (FIG. 1) and an actual stability monitor 2 of the hoisting mechanism, and comprises a hoisting mechanism protection pattern. Input terminals 3 and 4 of the selector 5 are wired to the output terminals of the hoisting mechanism overload detector 1 and to the output terminals of the hoisting mechanism actual stability monitor 2, respectively. An input terminal 7 of the winding mechanism cutout device 6 is connected to an output terminal of the winding mechanism protection pattern selector 5.

A further embodiment of the device for protecting the hoisting mechanism against overload and tilting according to the invention further comprises a basic andology 8 (FIG. 2) and an additional andology 9. Basic android logic 8 input terminal 10
and the input terminals 11 of the additional android 9 are respectively connected to the hoisting mechanism overload detector 1 and to the actual stability monitor 2 of the hoisting mechanism. The output terminal 15 of the hoisting mechanism boom angle data transmitter 14 is connected to the input terminal 12 of the basic andlogic 8,
The output terminal of the inverter is connected to the input terminal 13 of the additional and logic 9. Input terminal 17 of inverter 16 is connected to output terminal 15 of hoisting mechanism boom angle data transmitter 14 . The output terminals of the basic andology 8 and the output terminals of the additional andology 9 are connected to input terminals 3 and 4 of the winding mechanism protection pattern selector 5, respectively.

FIG. 3 is a diagram illustrating the operation of a device for protecting the hoisting mechanism against overload and tilting for a crane with a quadrilateral profile. The load on the hook remains unchanged. The quadrilateral support contour 18 is the specified load characteristic and the contour 19 is the actual state of crane stability.

FIG. 4 is a diagram illustrating the operation of a device for protecting the hoisting mechanism against overload and tilting for a crane with a triangular support profile. The load on the hook remains unchanged. Triangular support contour 20 is a specified load characteristic that intersects contour 19 at points 21 and 22. The contour 19 consists of two curves 23 and 24.

The operation of the device for protecting hoisting mechanisms against overload and tipping of the present invention for protecting pneumatically operated boom self-propelled hydraulic cranes will now be described.

The crane overload detector 1 is connected to a crane actual stability monitor 2. The crane overload detector 1 protects the crane at a distance determined by the contour 18 (FIG. 3) or 20 (FIG. 4);
The crane actual stability monitor 2 monitors the actual stability of the crane. That is, preliminary protection is provided at a distance determined by the contour 19.

Signals from the overload detector 1 and the actual stability monitor 2 are applied to input terminals 3 and 4 of the protection pattern selector 5, respectively. The output signal of the protection pattern selector 5 is applied to the input terminal 7 of the crane cutout device 6.

This protection device therefore protects the contour 19, the curve 23 of the contour 19 and the points 21 and 22 of the contour 20.
and the contour defined by the straight line between the lines.

In some cases, it is reasonable to alternately apply the output signals of the crane overload detector 1 and the stability monitor 2 to the protection pattern selector 5.

If the angle of slope of the boom with respect to the horizontal is large when the stable position of the crane is determined by the strength of the crane, a signal is given by the overload detector 1. If the angle of slope of the boom with respect to the horizontal is small when the stable position of the crane is determined by the stability of the crane, a signal is given by the stability monitor 2.

In this way, signals are provided alternately from the overload detector 1 and the stability monitor 2.

The output signal of the overload detector 1 is applied to an input terminal 10 of the basic andlogic 8. A signal from the output terminal 15 of the crane boom angle data transmitter 14 is applied to the input terminal 12 of the basic andlogic 8. The output signal of the basic andlogic 8 is applied to the input terminal 3 of the protection pattern selector 5. The output signal of the protection pattern selector 5 is applied to the input terminal 7 of the winding mechanism cutout device 6 to operate the winding mechanism cutout device. At the same time, output terminal 1 of the boom angle data transmitter 14
5 is applied to an input terminal 17 of an inverter 16, the output signal of that inverter is applied to an input terminal 13 of an additional android 9, and the signal from the actual stability monitor 2 of the hoisting mechanism is applied to an additional android. Protection pattern selector 5 through 9
is prevented from being applied to input terminal 4.

When the boom slope angle is small, no signal from the hoist boom angle data transmitter is provided, thereby preventing the signal from the overload detector 1 from being provided through the basic android 8.
At the same time, the signal from the actual stability monitor 2 of the winding mechanism is passed through an additional android 9 to the input terminal 4 of the winding mechanism protection pattern selector 5.
The inverter 16
provides an "enable" signal to the input terminal 13 of the additional and logic 9. The winding mechanism protection pattern selector 5 applies a signal to the input terminal 7 of the winding mechanism cutout device 6 to operate the winding mechanism cutout device 6.

The invention allows the stable position of the crane to be monitored, making the protection of the crane more reliable.

[Brief explanation of drawings]

1 is a block diagram of a device for protecting a hoisting mechanism against overload and tilting according to the invention; FIG. 2 is a block diagram of the device for protecting a hoisting mechanism against overload and tilting shown in FIG. FIG. 3 is a diagram illustrating the operation of the device for protecting the hoisting mechanism against overload and tilting of the invention as shown in FIGS. 1 and 2 for a crane with a quadrilateral support profile. 4 are diagrams for explaining the operation of the device for protecting the hoisting mechanism against overloads and tilting according to the invention according to FIGS. 1 and 2 for a crane with a triangular support profile; FIG. . DESCRIPTION OF SYMBOLS 1... Winding mechanism overload detector, 2... Winding mechanism actual stability monitor, 5... Winding mechanism protection pattern selector, 6... Winding mechanism cutout device, 8... Basic andology, 9... Additional andology, 14... Hoisting mechanism boom angle data transmitter, 16...Inverter.

Claims (1)

[Claims] 1. Protecting the hoisting mechanism against overload and tilting, comprising a hoisting mechanism overload detector 1 and a hoisting mechanism cut-out device 6 electrically connected to the hoisting mechanism overload detector. The device further comprises a winding mechanism actual stability monitor 2 and a winding mechanism protection pattern selector 5 electrically connected in series with the winding mechanism actual stability monitor 2; The other input terminal 3 of the selector 5 is electrically connected to the winding mechanism overload detector 1, and the output terminal of the winding mechanism protection pattern selector 5 is connected to the winding mechanism cutout device 6. Device that protects the hoisting mechanism against overload and tilting. 2. The device according to claim 1,
A device characterized in that an orology 5 is used as a winding mechanism protection pattern selector. 3. The device according to claim 2,
Basic andology 8 and additional andology 9
, an inverter 16 , and a hoisting mechanism boom angle data transmitter 14 .
The input terminal 10 of said basic andlogic 8 is electrically connected to the hoisting mechanism overload detector, the input terminal 11 of said andlogic 9 is electrically connected to the actual stability monitor 2 of said basic andlogic 8. The output terminal and the output terminal of the additional and logic 9 are connected to the or logic 5 and the inverter 1
The output terminal of 6 is connected to the other input terminal 13 of the additional android 9, and the output terminal of the hoisting mechanism boom angle data transmitter 14 is connected to the input terminal 17 of the inverter 16 and the other input terminal 12 of the basic android 8. A device characterized by: