KR101843511B1 - Device for detecting inclination based on ball movement - Google Patents

Abstract

The present invention relates to a mechanism for detecting inclination, which is installed in a crane, comprising: a main body (20) having a bottom surface (21) which forms a gradient at a center thereof to face a front area; a sphere (30) allowing oil (35) to be interposed in the main body (20) to be stored therein, and corresponding to inclination of the main body (20) to be moved; and a detecting means (40) corresponding to a movement status of the gradient (30) on one side of the main body (20) to produce a signal. Therefore, the mechanism can be installed in the crane exposed to vibration and shock in various fields in the transverse direction so as to detect a certain angle of inclination even when complex calculation is not used. Thus, operational reliability and durability can be maintained, thereby increasing stability of the crane.

Description

[0001] The present invention relates to a device for detecting inclination based on ball movement,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt detection mechanism, and more particularly, to a tilt detection mechanism based on a ball motion for detecting a deflection state in all directions mounted on a crane or the like to generate a signal.

Typically, a large or small crane device is installed on the site where the building is constructed or the ship is dried, thereby promptly and conveniently moving the heavy material. In recent years, due to the increase in the size of the building and the increase in the size of the ship, the crane system is also enlarged. Therefore, it is easy for the crane to be deflected due to the environmental factors. Therefore, the importance of a sensor that accurately detects a state in which a crane is deflected in any direction is increased.

As prior art documents which can be referred to in this connection, there are known the following Korean Patent Publication No. 0736658 (Prior Art 1) and Japanese Patent Application Laid-Open No. 7-190761 (Prior Art 2).

The prior art document 1 includes a conductive ball which moves along a first inclined surface to a second inclined surface as the case is inclined; And a center electrode mounted on an upper portion of the case to electrically contact the second inclined surface through a conductive hole when the conductive ball is located on the second inclined plane. Thus, an effect of simply detecting whether the object falls within a predetermined angle after the object is inclined at a certain angle is expected.

The prior art document 2 has a container, a plurality of electrodes provided at a plurality of symmetrical positions in the container, and a conductive body that is housed in the container and freely moves in the container. The conductive state of the conductive body and the electrode, As shown in FIG. Therefore, the assembly quality is not required, the space element is excellent, and an effect of detecting and detecting the inclination in a plurality of directions is expected.

However, according to the above-mentioned prior art, there is a limit to maintain operation reliability of detecting a specific inclination angle by installing the crane on a crane exposed to vibration and impact, and thus it shows a room for improvement.

Korean Patent Registration No. 0736658 entitled "omnidirectional tilt sensor" (published on Jul. 7, 2007). Japanese Unexamined Patent Publication No. 7-190761 entitled "Tilt sensor" (published on July 28, 1995).

It is an object of the present invention to overcome the above-mentioned problems of the prior art, and it is an object of the present invention to provide a crane which is always installed in a crane exposed to vibration and shock at a construction site, and which can maintain durability along with operational reliability of detecting a specific inclination angle, A tilt detection mechanism based on a ball motion.

In order to achieve the above object, the present invention provides a mechanism mounted on a crane for detecting a change in tilt, comprising: a main body having a bottom surface forming a gradient in all directions from a center; A sphere accommodated in the main body with oil interposed therebetween, the sphere being movable in accordance with a tilt of the main body; And detection means for generating a signal corresponding to a movement state of the sphere at one side of the main body.

As a detailed construction of the present invention, the main body is characterized by forming a gradient of an inclination angle smaller than that of the bottom surface in a ceiling scene facing the bottom surface.

As a detailed constitution of the present invention, the oil is characterized in that paraffin, a liquid rust preventive and an antioxidant are added to a lubricant oil having light transmittance.

As a detailed configuration of the present invention, the detection means uses a proximity sensor which generates a signal corresponding to a deviation of a specific set distance.

As a modification of the present invention, the detection means further comprises a direction sensor at a position which is equidistant from 4 to 8 on the circumference concentric with the main body.

As another modification of the present invention, the main body further includes adjustment means for varying the movement state of the sphere.

In this case, the adjusting means includes a variable container accommodated in the form of a bottom surface inside the main body, and a regulator for causing a height variation by engaging with the presser bar at the center of the variable container.

As described above, according to the present invention, there is an effect of increasing the stability of the crane due to the operation reliability and durability of detecting a specific inclination angle even if the crane is exposed to vibrations and shocks of various sites and installed in the lateral direction .

Brief Description of the Drawings Fig.
2 is a schematic view showing a mechanism according to a modification of the present invention
Fig. 3 is a schematic view showing the operation principle of the mechanism in the plane of Fig. 2
4 is a schematic view showing a mechanism according to still another modification of the present invention

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

The present invention proposes a mechanism mounted on a crane for detecting a change in tilt. Referring to FIG. 1, the crane has a structure in which the wire 11, the sheave 15, and the hook 13 are sequentially connected in the downward direction of the hoist 10. The present invention is highly applicable to a detection mechanism mounted on a crane, but is not necessarily limited to this.

The main body 20 according to the present invention is a structure having a bottom surface 21 forming a gradient in the central omnidirectional direction. The main body 20 forms an internal space of a closed structure by using the bottom surface 21, the ceiling surface 22, and the side wall surface. The bottom surface 21 forms a gradient of an arc or conical cross-section of the same curvature omnidirectionally as if it were a pot lid. The omnidirection refers to a radial direction in the range of 360 占 based on the center point of the lowest position on the bottom surface 21. [

Meanwhile, the main body 20 can be fixed to the sheave 15 of the crane by using the fastening holes 23. The main body 20 can be easily mounted on the outer circumferential surface of the sheave 15 as a small structure, but a housing for tight support may be additionally provided in some cases.

The main body 20 is characterized by forming a gradient of an inclination angle smaller than that of the bottom surface 21 in the ceiling surface 22 opposed to the bottom surface 21 as a detailed configuration of the present invention. In Fig. 1, the internal space of the main body 20 is illustrated as being the highest at the center and contracted at the edge. In this case, there is a possibility that the sphere 30 to be described later collides with the detecting means 40 due to an external impact acting on the crane, or the movement due to the inclination of the crane is somewhat delayed. If the bottom surface 21 and the ceiling surface 22 are formed in a similar gradient, this disadvantage is advantageous to overcome. However, if the gradient angle of inclination of the ceiling surface 22 is larger than the gradient angle of inclination of the bottom surface 21, the movement path of the ball 30 becomes narrower, which is not preferable.

According to the present invention, a sphere 30 movable in accordance with the inclination of the main body 20 is accommodated in the main body 20 with the oil 35 interposed therebetween. It is preferable to use a metal material having high specific gravity and good corrosion resistance. The oil 35 filled in the inner space of the main body 20 together with the spherical body 30 acts as a damping for delaying the unnecessary movement of the spherical body 30 due to temporary external impact or vibration.

As a detailed constitution of the present invention, the oil (35) is characterized in that paraffin, a liquid rust preventive agent and an antioxidant are added to a lubricant oil having light transmittance. Crane is required to have high corrosion resistance, heat / oxidation stability, abrasion resistance and flame retardancy as well as high viscosity index due to large seasonal temperature change due to its characteristic of running outdoors at all times. It is advisable to mix paraffin (liquid phase) which increases the viscosity index based on a known lube oil having light transmittance.

On the other hand, the main body 20 is provided with a sealing cap 25 on its upper surface for inspection and replacement of the ball 30, the oil 35, and the like. The sealing cap 25 is coupled to the main body 20 in a spiral manner and increases the sealing force through a packing (not shown).

According to the present invention, the detection means (40) generates a signal corresponding to the moving state of the ball (30) at one side of the main body (20). The detecting means 40 serves as a switch for generating a predetermined signal at a moment when the sheave 15 connected to the wire 11 of the crane exceeds a predetermined angle (for example, 5 degrees). The switch role eliminates the calculation of the angle by the controller (not shown) and requests the microprocessor to interrupt at the set angle, thereby reducing the calculation burden.

In a detailed configuration of the present invention, the detection means (40) is characterized by using a proximity sensor (43) which generates a signal corresponding to the deviation of the set distance of the sphere (30). The proximity sensor 43 is mounted on the sealing cap 25 in an upper space corresponding to the center point of the bottom surface 21 in the internal space of the main body 20. [ The proximity sensor 43 generates a signal when the ball 30 is deviated by a predetermined distance from the center point of the bottom surface 21 due to the inclination of the crane. The proximity sensor 43 is fixed to the sealing cap 25 while being mounted on the substrate 41. On the substrate 41, a rechargeable battery 47 is provided in case of a power failure or the like.

As a modification of the present invention, the detecting means 40 further comprises a direction sensor 45 at a position 4 to 8 on the circumference concentric with the main body 20 at an equilibrium position. If the crane is repeatedly tilted and restored due to multiple factors, sufficient information is obtained by using the direction sensor 45 in addition to the proximity sensor 43. The direction sensor 45 is simple to use a photo sensor, but does not exclude a hall sensor or the like. In FIGS. 2 and 3, the main body 20 is wide in the lateral direction and short in the longitudinal direction, so that eight direction sensors 45 are mounted on the substrate 41. FIG. In this case, when the sphere 30 moves accurately in eight directions, a signal is generated in one direction sensor 45, and when moving in the middle direction, signals are simultaneously generated in two adjacent direction sensors 45. In either case, the data about the direction in which the crane is tilted can be obtained and analyzed by the operation.

As another modification of the present invention, the main body 20 further comprises adjusting means 50 for varying the moving state of the ball 30. When the type of the crane, the work contents, the surrounding environment, etc. are largely changed, the movement motion of the ball 30 can be controlled to maintain the operation reliability and stability. Factors influencing the behavior of the ball 30 include the inclination angle of the bottom surface 21, the size and weight of the ball 30, the physical properties of the oil 35, and the resolution of the proximity sensor 43.

The control means 50 includes a variable container 52 received in the form of a bottom surface 21 inside the main body 20 and a pressure vessel 54 meshing with the presser bar 54 at the center of the variable container 52, And a controller (56) for generating a control signal. Selection of the inclination angle of the bottom surface 21 with the adjustment means 50 takes into account the ease of adjustment from the outside. To this end, the variable container 52 having the bottom surface 21 of the same shape is hermetically sealed at the upper end of the inner space of the main body 20. [ A presser bar 54 is integrally fixed to the lower side of the center point of the variable vessel 52 and is engaged with a regulator 56 coupled to the main body 20. [ A specific embodiment of the regulating means 50 is illustrated in Figures 4 (a) and (b).

4 (a), the pressure pedal 54 has a disk 58 at the lower end with good lubricity, and the regulator 56 rotatably receives the disk 58 and is helically engaged with the body 20 . 4 (b), the presser bar 54 is provided with a female thread at its lower end, and the adjuster 56, which is rotatably mounted on the main body 20 via the disc 58, Lt; / RTI > In any case, when the adjuster 56 is rotated, the inclination of the gradient of the variable container 52 is changed by the ascending and descending of the pressing pedal 54. Since the inclination range is about 1 to 2 degrees based on 5 degrees, there is no fear that the variable container 52 will suffer a yield point or fatigue breakdown.

As an example of operation, when the inclination is determined to be equal to or higher than a set value (for example, 5 deg.) In the middle of operating the crane, a signal is generated at the proximity sensor 43 built in the main body 20, (15) and the hook (13).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

10: Traction machine 11: Wire
13: Hook 15: Sieve
20: main body 21: bottom surface
22: Thousand Scene 23: Fastening Ball
25: Sealing cap 30: Sphere
35: Oil 40: Detection means
41: substrate 43: proximity sensor
45: direction sensor 47: battery
50: regulating means 52: variable container
54: pressurizing band 56: regulator
58: Disc

Claims (7)

A mechanism mounted on a crane for detecting a change in tilt, comprising:
A body (20) having a bottom surface (21) forming a gradient from a central to an omnidirectional;
A sphere 30 accommodated in the main body 20 through an oil 35 and movable in accordance with a tilt of the main body 20; And
And detection means (40) for generating a signal corresponding to a movement state of the ball (30) at one side of the main body (20)
The main body 20 further comprises adjustment means 50 for varying the movement state of the ball 30,
The adjustment means 50 includes a variable container 52 received in the form of a bottom surface 21 in the interior of the main body 20 and a pressurizing member 54 engaged with the pressurizing member 54 at the center of the variable container 52, And a controller (56). The method according to claim 1,
Wherein the main body (20) has a gradient of an inclination angle smaller than the floor surface (21) in a ceiling surface (22) facing the floor surface (21). The method according to claim 1,
Wherein the oil (35) is used by adding paraffin, a liquid rust preventive, and an antioxidant to a lubricant oil having light transmittance. The method according to claim 1,
Wherein the detecting means (40) uses a proximity sensor (43) which generates a signal in response to the deviation of the set distance of the ball (30). The method according to claim 1,
Wherein the detecting means (40) further comprises a direction sensor (45) at an equilibrium position of 4 to 8 on a circle concentric with the main body (20). delete delete

Images