KR200218113Y1 - Display Unit for the Differential Angle of Center of Gravity on the Crane - Google Patents

Abstract

The present invention relates to a crane center of gravity deviation display device that displays the degree of inconsistency of the position of the center of gravity of the crane and the center of gravity of the carrying object when hoisting the lifting object to the crane.

The present invention consists of a mechanical display, a converter and an electrical display,

The mechanical display device comprises an indicator hand 14, a weight 8 and a case 2,

The case 2 has a center line and a through hole,

The indicator needle 14 has a tip portion formed at one side end, and the rotating shaft 13 is integrally fixed to the central portion and coupled, and the rotating shaft 13 is rotatably coupled to the through hole of the case 2. To the other end of the indicator needle 14, the weight 8 having a sufficient weight is coupled to be free to move,

The converter 15 is fixedly installed on the rotating shaft 13 so as to convert the mechanical motion into an electrical signal and display it,

The electrical display device 20 is configured to receive and display a signal output from the converter 15.

Characterized in that configured.

According to the present invention, since the deviation angle of the center of gravity of the crane can be displayed objectively, an appropriate judgment can be derived according to the degree of departure regardless of the operator's experience or the working environment of the workplace. Finding the center of gravity and re-elevating to move the carrying object 37 to prevent safety accidents and to prevent damage to the facility to improve productivity as well as to minimize the damage to life has a very practical effect.

Description

Display Unit for the Differential Angle of Center of Gravity on the Crane}

The present invention relates to a crane center of gravity deviation display device that displays the degree of inconsistency of the position of the center of gravity of the crane and the center of gravity of the carrying object when hoisting the lifting object to the crane.

1 is a view illustrating a problem in the conventional hoisting work.

In the related art, when hoisting work by hanging the transport object 37 on a crane, the hook 34 is hooked on the transport object 37 as shown in FIG. 1, wherein the position of the crane center of gravity 33 and When the position of the conveying object center of gravity 36 does not coincide, a so-called swing phenomenon occurs in which the conveying object 37 shakes back and forth or left and right during hoisting. However, when such a swing occurs, the carrying object 37 collides with the surrounding equipment, worker, and the like, causing damage to the facility or a human accident. Particularly, when the carrying object 37 does not have the hook hanger 35, it is transported during the swing. There is a high risk that a fall accident of the object 37 may occur and cause a large accident. Therefore, in order to prevent such a swing phenomenon, the operator of the cab 26 or the manipulator 27 must check whether the position of the crane center of gravity 33 and the position of the object center of gravity 36 match before hoisting. .

However, in the related art, the positioning operation was only dependent on the eyes of the operator. In addition, since the conclusions can vary greatly depending on the lighting conditions of the workplace or the subjective judgments of the workers, there was a risk of causing a serious accident. Therefore, the information on the difference (L) in the plane distance between the center of gravity of the crane 33 and the center of gravity of the conveying object 36 or the angle α between the center of gravity of the conveying object 36 from the crane center of gravity 33 is quantified. Or the need for a device that can be digitized and displayed was a very big situation.

The present invention is devised to solve the above problems, the device that can objectively display the departure angle (α) from the crane center of gravity (33) to the center of gravity of the conveying object (36) at the same time by mechanical and electrical expression Is to provide.

1 is a view illustrating a problem in the conventional hoisting work,

2 is an explanatory view of the installation position of the display device of the present invention;

3 is a front view of the display device of the present invention;

4 is an exploded side view of the display device of the present invention;

5 is an explanatory diagram of an embodiment for increasing the angle display of the display device of the present invention;

6 is an explanatory diagram of an embodiment for controlling the reaction rate of the display device of the present invention;

<Description of the symbols for the main parts of the drawings>

1: cover 2: case

5: transparent plate 6: resistance wing

7: wing adjuster 8: weight

10 link plate 13 rotation axis

14: indicator hand 15: inverter

17: gasket 20: electrical display device

26: Cab 27: Remote Controller

29: Sheave 33: Center of gravity of crane

34: hook 35: hook hook

36: center of gravity of the carrier object 37: carrier object

In order to achieve the above object, the display device of the present invention is largely composed of a mechanical display device, a conversion device and an electrical display device.

First, the installation position of the display device of the present invention will be described.

2 is an explanatory view of an installation position of the display device of the present invention.

The display device of the present invention, in particular the mechanical display device, should be installed in a place where the size of the disengagement angle can be most accurately represented. Such a suitable installation place may be an outer wall of the sheave 29. That is, the deviation angle α can be most accurately measured just before the rope is tensioned and the carrier object 37 moves by applying tension while the crane is in the carrier object 37.

Next, the configuration of the display device of the present invention will be described.

3 is a front view of a display device of the present invention, and FIG. 4 is a side exploded perspective view of the display device of the present invention.

The mechanical display constituting the display device of the present invention is largely composed of an indicator hand 14, a weight 8, and a case 2.

The case 2 is provided with a center line and a through hole, and a scale or an angular area mark (including color marks classified as safety and danger), etc., which are symmetrically positioned around the center line, is represented, and the center thereof is represented. The through hole is formed on the extension line of a site | part.

The indicator needle 14 has a tip portion formed at one side end, and a rotation shaft 13 is integrally fixed to and coupled to the center portion, and the rotation shaft 13 is freely rotatable in the through hole of the case 2. Combined. At this time, by installing a bearing or the like in the through hole of the case 2 can help free rotation of the rotary shaft (13).

And the other end of the indicator needle 14 is coupled so that the weight (8) is free to move. In this case, the weight 8 should have a weight sufficient to overcome both the rotational inertia of the indicator needle 14 and the rotational inertia of the converter.

On the other hand, the conversion device 15 constituting the display device of the present invention is a device that can play a role of converting mechanical or mechanical motion into an electrical signal and displayed, it is fixedly installed on the rotary shaft (13). Therefore, when the indicator needle 14 rotates, the angle is directly reflected by the converter 15, so that the electrical signal is changed. In this case, in order to reflect the force due to the rotation of the indicator needle 14 to the converter 15 as much as possible, the transmission force may be maximized through proper gear conversion.

Conventional techniques related to such an electromechanical converter are very diverse, and in the case of the present invention, it is not specific to any of them, but a simple one may be used, for example, a variable resistor or a potentiometer. A laser device, an optical interference device, or the like, which counts the rotational speed of a wheel having a perforation hole and measures the rotational angle, may be used therein.

Finally, the electrical display device 20 constituting the display device of the present invention is a device that receives the signal output from the converter 15 and displays it as useful information such as numbers to the operator, such electrical display in the prior art What can be used as the apparatus 20 can be variously used, for example, the monitor of a computer including a 7-segment or a liquid crystal display. The electrical display device 20 can be installed anywhere as long as the signal line length and noise can be eliminated. Particularly, the electrical display device 20 is a sheave 29, a cab 26, or a remote controller 27.

Hereinafter, the operation of the display device of the present invention having the configuration as described above will be described.

First, the display device of the present invention is installed as shown in FIG. 2, and then zeroed by vertically hanging from the crane as shown in FIG. 3A. In this case, since the indicator hand 14 always stands upright by the weight of the weight 8, the mechanical display device indicates the center of the scale, and the electrical display unit 20 should display a symbol indicating that the value is 0 or other center. .

Thereafter, as shown in FIG. 2, when the conveying object 37 is actually transported, tension is applied while the crane is caught by the conveying object 37. Then, the rope is tensioned, and the transport object 37 is in a state just before moving. At this time, the departure angle (α) can be measured most accurately, and in this case, as shown in FIG. 3B, the indicator hand 14 always stands upright by the weight of the weight 8, if the center of gravity is separated The sheave 29 will be inclined, and accordingly, the scale displayed on the case 2 is also inclined, so that the deviation state is also reflected between the center line of the scale and the indicator needle 14. Therefore, the operator can easily check the degree of departure of the center of gravity by the mechanical display device.

Meanwhile, the converter 15 has a body part fixed to the case 2, and the shaft part is fixed to the rotation shaft 13 of the indicator needle 14, so that the rotation shaft 13 is relatively separated from the case 2. It rotates by an angle. Therefore, the electrical resistance is reduced or other electrical changes are generated to reflect the degree to the electrical display device 20. Therefore, the operator can easily check the degree of departure of the center of gravity by the electrical display device (20).

Here, if the degree of departure is small, it may be fine to perform a sudden hoisting operation, but if the degree of departure is large, the hoisting and hoisting operations are repeated slowly to prevent the swing phenomenon, and then the complete degree of hoisting is performed.

On the other hand, for the present invention having the above-described configuration, as the display angle of the mechanical display device increases, the readability of the operator increases, and the display content of the electrical display device 20 through the converter 15 can be further subdivided. It is also desirable to consider a method of increasing the rotation angle of 14).

5 is an explanatory diagram of an embodiment for increasing the angle display of the display device of the present invention.

In the above embodiment, the indicator needle 14 is rotatably coupled to the through hole of the case 2 with a long groove formed on the opposite side of the tip portion, and the link plate is connected to another through hole on the center extension line of the case 2. 10 is also coupled to be freely rotatable, in which case the inside of the through hole of the case 2 can also help the free rotation of the link plate 10 by installing a bearing or the like.

One side of the link plate 10 is formed with a long groove, the other end is coupled to the weight (8) freely movable. In addition, the long groove of the indicator needle 14 and the long groove of the link plate 10 are fastened in a structure capable of sliding by sliding the other groove by a sleeve fixed to a specific position of one of the two grooves.

Referring to the operation of the embodiment, the link plate 10 is standing upright by the gravity acting on the weight (8) in the absence of the departure angle first, as shown in Figure 5a, accordingly The tip will point to the center.

However, the link plate 10 is also standing upright by the gravity of the weight (8) in the state of the departure angle, the movement angle of the tip of the indicator needle 14 is the opposite of the indicator needle 14 and the link plate 10 It depends on where the long grooves fit. For example, when the fixing is fixed to the lower end of the elongated groove of the link plate 10 and the sleeve is coupled to slide the elongated groove of the indicator needle 14 as shown in Figure 5b The tip portion of 14 is relatively less moved, but on the contrary is fixed to the sleeve at the upper end of the elongated groove of the link plate 10, the sleeve is coupled to slide the inside of the elongated groove of the indicator needle 14 In this case, as shown in Fig. 5C, the tip of the indicator needle 14 has a relatively large moving angle.

On the other hand, when the rope is in tension when the deviation angle is measured, the indicator hand 14 rotates, and until the steady state is reached, the left and right shaking of the indicator hand 14 occurs excessively. It is necessary to find a color, which can realize stable operation of the indicator needle 14 by controlling the reaction speed of the indicator needle 14.

6 is an explanatory diagram of an embodiment for controlling the reaction speed of the display device of the present invention.

First, in order to control the reaction speed, the speed of the indicator needle 14 of the mechanical display device should be reduced, and for this purpose, the indicator needle 14 may be moved in a liquid having a higher resistivity than air. To this end, as shown in FIG. 4, the inside of the mechanical display is filled with a liquid, and the cover 1 provided with the transparent plate 5 is sealed using the gasket 17.

And the resistance wing 6 is installed at the bottom of the original weight 8 as shown in FIG. At this time, the resistance wing (6) is composed of a shape having both wings of the equilibrium, and a protrusion-like structure is formed at the bottom of the center. In addition, the resistance blade 6 is installed in close contact with the inside of the hole of the weight (8) so as to be rotated when applying a predetermined force in the state inserted into the hole of the weight (8).

And as shown in Figure 6c, while maintaining the airtight of the liquid filled in the bottom center of the case (2) by applying a force to turn the resistance wing while rotating in close contact with the protrusion-like structure formed on the lower end of the resistance wing (6) 6) can be rotated at an angle within 90 degrees, and when the force is removed, a wing adjuster 7 configured to retreat under the action of an internal spring is installed. Here, the embodiment of the wing adjuster 7, for example, the whole of the wing adjuster 7 is formed in a single pillar-shaped body, the handle is installed on the lower end, the stopper is installed on the lower end of the protrusion, the case (2) The spring is installed between the outer circumferential surface of the handle and the handle, and the through hole of the case 2 and the outer circumference of the body of the wing adjuster 7 can be easily implemented by installing a sealing structure.

Referring to the operation of the above embodiment, the operation of the weight 8 in the fluid is basically not smoother than in the air can naturally prevent the left and right swing of the indicator needle 14 to some extent. In the case where the resistance blades 6 are provided below the weight 8, the deceleration effect is almost the same when the resistance blades 6 are arranged parallel to the movement direction as shown in FIG. 6A. However, when the force is applied to the wing adjuster 7 shown in Figure 6c to move forward to rotate the projection portion at its tip abuts against the projection of the lower portion of the resistance wing 6 in the case 2 rotates together The angle of the resistance wing 6 can be adjusted. If the resistance wing 6 is arranged perpendicularly to the direction of movement as shown in Fig. 6B, the movement resistance in the liquid is maximized, so that the swing of the indicator needle 14 is reduced. It can further reduce.

The embodiment of increasing the angle display of the display device of the present invention and the embodiment of controlling the reaction speed are not mutually exclusive, and thus may be independently coupled to the basic embodiments of the present invention.

In addition, it is possible to further improve the readability by applying a luminous paint to the indicator needle 14 in accordance with the working environment of the workplace.

According to the present invention as described above, because the deviation angle of the center of gravity of the crane can be displayed objectively, it is possible to derive the appropriate judgment according to the degree of departure regardless of the operator's experience or the working environment of the workplace. By adjusting and finding a safe center of gravity and lifting again, the carrying object 37 is moved to prevent safety accidents and to prevent equipment damage, thereby improving productivity as well as minimizing damage to life.

Claims (1)

Consisting of mechanical display, inverter and electrical display, The mechanical display device comprises an indicator hand 14, a weight 8 and a case 2, The case 2 has a center line and a through hole, The indicator needle 14 is freely rotatably coupled to the through hole of the case 2 by a rotation shaft 13 fixedly fixed to the indicator needle 14 with a long groove formed on the opposite side of the tip portion, and the case 2. Another through hole on the central extension line of the link plate 10 is rotatably coupled, one side of the link plate 10 is formed with a long groove, the other end is coupled to the weight (8) freely movable. The long groove of the indicator needle 14 and the long groove of the link plate 10 are fastened to a structure capable of sliding by sliding the other groove by a sleeve fixed to a specific position of one of the two grooves, The inside of the mechanical display is filled with a liquid, sealed with a gasket (17) with a cover (1) provided with a transparent plate (5), and in the hole at the bottom of the weight (8) in the form of a projection at the bottom of the center Resistant wing 6 is formed in close contact with the structure of the structure is formed, and installed to be configured to rotate when applying a certain force or more, In the center of the lower end of the case (2), while maintaining the airtightness of the liquid while applying a force to turn the resistance wing 6 while rotating in close contact with the protrusion-like structure formed on the lower end of the resistance wing (6) at an angle within 90 ° Can be removed, and when the force is removed, the wing adjuster 7 is configured to retreat under the action of an internal spring, The converter 15 is fixedly installed on the rotating shaft 13 to convert the mechanical movement angle of the indicator needle 14 into an electrical signal corresponding thereto. The electrical display device 20 is configured to display a number or symbol corresponding to the mechanical movement angle of the indicator hand 14 by receiving the signal output from the converter 15, the center of gravity of the crane characterized in that the configuration Each display.