KR101958983B1 - Shock absorbing apparatus of tong crane - Google Patents

Abstract

A crane crane impact reduction device is disclosed. The block crane impact reduction device according to the present invention includes a block supporting surface for picking up and transporting a slab by a clamping device suspended from a rotating crane, the block supporting surface having two column shafts into which blocks are inserted and which support the blocks; And a roller provided to be rotatably driven in a direction of contact between the cross arm and the slab of the clamping device so as to compensate for an offset generated when the clamping device grips the slab, and a spring and a roller connecting the block supporting face and the face- An offset blocking bar for restricting rotational driving in a direction perpendicular to the contact direction of the slab; Wherein the block supporting surface and the roller are provided in a planar shape and are provided on a surface of an interview pendant in direct contact with the slab.

Description

[0001] SHOCK ABSORBING APPARATUS OF TONG CRANE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a crane impact reduction device capable of mitigating an impact from a vertical load.

Generally, a barrel crane is a slab-moving device that picks up a slab, such as a slab, by means of a pliers and moves it forward along the running rail, thereby releasing the slab to its destination.

To this end, the barrel cranes are equipped with a clamping device which is hung on the crane through a wire or bar device.

Methods for reducing the impact of the crane cranes include controlling the impact speed between the crane slabs, transporting the crane slabs without touching them, or changing the contact method during the contact.

However, even with the above-mentioned methods, it is possible to cause the deformation of the apparatus due to the heat conducted from the hot slab and the failure thereof.

In addition, there is still a possibility that the impact due to the weight of the upper and lower parts of the crane constituting the crane is transmitted to the slab while the crane is descending, thereby damaging the crane or damaging the slab surface.

In addition, the clamping device of the barrel crane is designed such that the crossarms are installed on both sides to grip the left and right sides of the slab. When the clamping device is lowered to pick up the slab, the supporting block contacts the slab, and the driver judges this and stops the descent of the clamping device.

In order to pick up the product, ie the slab, the clamping cranes thus constructed are first lowered to place the block on the slab.

Then, lifting the clamping device causes the slab to be bitten by the clamping device by the load of the slab. When the slab is snapped on the clamping device, the crane moves while holding the slab and moves the slab by moving the clamping device again from the target position of the slab.

Generally, the cross arms constituting the clamping device do not contact the slabs at the same time on both sides.

In other words, since the slab contacts with the cross arm with a time difference, an offset occurs in which the roller contacting the slab is moved under the crane, and the roller can be applied to offset the slab without scratches and impacts.

However, there is a case where a concentrated load due to a line contact between the roller and the slab surface is applied during the initial contact of the slab with the slab, thereby causing cracks on the surface of the slab.

Therefore, there is a need to develop a device having a structure that can complement the advantages and disadvantages of the roller.

An embodiment of the present invention is to provide a crane impact reduction device capable of preventing possible defects on the slab surface.

An embodiment of the present invention is to provide an impact reducing device capable of compensating an impact load due to the weight of a crane itself and coping with an offset by a cross arm.

An embodiment of the present invention seeks to provide a cranes impact reduction device capable of resistance to thermal deformation.

According to an aspect of the present invention, there is provided a shock absorber of a barrel crane for picking up and transporting a slab by a clamping device suspended from a crane, comprising: a block supporting surface having two column shafts inserted therein and supporting the block; A roller arranged to rotate in a direction of contact between the cross arm of the clamp device and the slab so as to compensate for an offset generated when the clamp device grips the slab; a spring connecting the block support surface and the contact- And an offset blocking bar for restricting rotation of the roller in a direction perpendicular to a contact direction of the cross arm and the slab, wherein the block supporting surface and the roller are provided in a planar shape, A crane impact reduction device is provided on a crane.

       Wherein the roller is provided at both ends of the block supporting surface and the spring allows the position of the surface of the contact pacing surface to be returned to the center of the block supporting surface in correspondence with the rotational driving of the roller .

The offset blocking bar may be provided symmetrically with the upper surface of the interview pile and provided between the two pillar shafts.

And a thermal deformation blocking bar for resisting thermal deformation by the slab.

The thermal deformation blocking bar may be provided so as to be symmetrical to the upper surface of the face of the interview pendant.

Further comprising a rotation ring provided on an upper surface of the contact piercing surface so that the spring can rotate.

And a ceramic paper provided to resist the thermal deformation of the rotary ring by the slab, the ceramic paper being provided on an interface between the face to be interviewed and the rotary ring.

The apparatus for reducing the impact of a crane crane according to the embodiment of the present invention can reduce the impact from the load of the crane.

The crane impact reduction device according to the embodiment of the present invention can overcome the offset caused by the crossarm.

The crane impact reducing device according to the embodiment of the present invention can resist thermal deformation by the slab.

1 is a cross-sectional view of a conventional vault crane.
2 is a view showing a state in which a cross arm of a conventional vat crane is in contact with a slab.
FIG. 3 is a view showing offsets generated in the crossarm contact process of FIG. 2. FIG.
4 is a perspective view of a crane impact reduction device according to an embodiment of the present invention.
5 is an enlarged view schematically showing a ceramic paper in a crane crane shock absorber according to an embodiment of the present invention.
6 is a graph showing the effect of applying the ceramic paper of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs, and the present invention is not limited thereto, but may be embodied in other forms. In order to clarify the present invention, it is possible to omit the parts of the drawings that are not related to the description, and the size of the components may be slightly exaggerated to facilitate understanding.

FIG. 1 is a sectional view of a conventional vault crane, FIG. 2 is a view showing a state where a cross arm of a conventional vault crane is in contact with a slab, FIG. 3 is an illustration of an offset generated in the cross- 4 is a perspective view of a crane impact reducing device 6 according to an embodiment of the present invention, FIG. 5 is an enlarged view schematically showing a ceramic paper in a crane impact reducing device 6 according to an embodiment of the present invention And FIG. 6 is a graph showing the effect of applying the ceramic paper of FIG.

1 to 5, a crane impact reducing device 6 according to an embodiment of the present invention includes a block support 4 having two pillar shafts into which a block 4 is inserted and which supports a block 4, A roller 4 arranged to rotate in the direction of contact between the cross arm 2 of the clamping device 1 and the slab 5 so as to compensate an offset generated when the clamp device 1 picks up the slab 5, The spring 7 and the roller 4a connecting the block supporting surface 4b and the contact surface 6a are rotated in the direction perpendicular to the contact direction of the cross arm 2 and the slab 5, And an offset blocking bar 6b for restricting the driving.

At this time, the block supporting surface 4b and the roller 4a are provided in a planar shape and are provided on the surface of the contact piercing surface 6a in direct contact with the slab 5.

Referring to FIGS. 1 and 2, the barrel cranes are provided with clamping devices on both sides to grip the left and right sides of the slab.

As described above, when the clamping device 1 is lowered to pick up the slab 5, the block 4 comes into contact with the slab, and the driver judges that the slab 5 is stopped and stops the descent of the clamping device.

The barrel crane constructed in this way descends first the clamping device 1 to place the block 4 on the slab 5 in order to pick up the product, i.e. the slab 5. The slab 5 is lifted up with the cross arms 2 and jaws 3 constituting the clamping device 1 in contact with both sides of the slab 5, 1).

When the slab 5 is pinched by the pinching device 1, the crane moves while holding the slab 5 and moves the slab 5 again by lowering the pinching device 1 at the target position of the slab 5 .

On the other hand, when the cross arm 2 described above is operated, the jaws 3 provided on both sides can contact the left and right sides of the slab 5 with a time difference, not when both sides of the slab 5 are simultaneously contacted .

In this case, referring to FIG. 3, the slab 5 is moved in a direction in which the cross arm 2 first comes into contact with and pressed, and the roller 4a, which is in contact with the upper portion of the slab 5 in the same direction, Rotate and move. Subsequently, the slab 5 and the roller 4a are moved in the direction in which the cross arm 2 pushes up later.

That is, an offset occurs in accordance with the difference in contact time between the left and right sides of the slab 5 of the cross arm 2, and at this time, there is a risk that the surface of the slab 5 is broken due to repetitive driving rotation of the roller 4a Can exist.

The above-mentioned crane impact reducing device 6 is provided with a roller 4a provided so as to be rotatably driven in contact with the slab 5 in the direction of contact with the cross arm 2 of the pinching device 1, 4b and the contact surface 6a.

Accordingly, when the offset shown in FIG. 3 is generated, the roller 4a is provided so as to be capable of driving and rotating on the surface 6a of the contact pads 6a, not on the surface of the slab 5, It is possible to prevent the surface of the slab 5 from being damaged.

The above spring 7 connects the block supporting surface 4b and the face of the face to be contacted 6a so that the position of the face 6a of the face to be interviewed corresponds to the rotation of the roller 4a, Can be prevented from being separated from the center of the block supporting surface 4b.

The above-described crane impact suppression device 6 may further include a rotation ring 8 provided on the upper surface of the contact-target surface 6a so that the above-described spring 7 can rotate.

4, a spring 7 connecting an existing supporting block block supporting surface 4b and an interview paging surface 6a is connected by a rotary ring 8, and the tension and compression direction of the spring 7 are excluded Durability can be ensured by eliminating the restraining force against rotation.

In order to solve the problem when the offset shown in FIG. 3 is generated, referring to FIG. 4, the crane impact reduction device 6 according to the embodiment of the present invention includes an offset by the cross arm 2 And an offset blocking bar 6b for restricting the roller 4a from rotating in a direction perpendicular to the direction of contact with the crossarm 2 when the roller 4a is generated.

Here, the offset blocking bar 6b is provided symmetrically on the upper face of the face for urging the interviewer 6a.

In addition, the distance O between the two column shafts constituting the block supporting surface 4b is adjustable so that the above-described offset can be generated.

That is, when the offset occurrence expected distance O is larger than the distance between the above-described two column shafts, the offset blocking bar 6b is caught by any one of the column shafts.

As a result, the left and right movement of the block supporting surface 4b can be restricted, and the rotation of the rollers 4a provided at the left and right lower ends of the block supporting surface 4b is limited, have.

Since the slab 5 to which the above-described crane impact suppression device 6 is brought in contact has a high temperature condition exceeding 800 degrees, there is a high possibility that thermal deformation due to heat conduction occurs.

Therefore, the bottom crane impact reducer 6 according to the embodiment of the present invention further includes the thermal deformation blocking bar 6c, thereby preventing thermal deformation of the slab 5 due to thermal conduction.

That is, since the offset blocking bar 6b and the thermal deformation blocking bar 6c are provided on the upper surface of the face 6a to be symmetrical about the back and forth and left and right positions, heat conduction from the slab 5 Can be prevented from being deformed.

Meanwhile, in the conventional method in which the crane is in contact with the slab 5, the crane is vertically lowered and the roller 4a comes into line contact with the surface of the slab 5, thereby fixing the crane.

At this time, when the roller 4a and the slab 5 are brought into line contact with each other, the pressure due to the load of the barrel crane is applied to the surface of the slab 5, .

Therefore, in order to solve the above-mentioned problems, the crane impact reducing device 6 according to the embodiment of the present invention applies the surface contact method not the line contact between the slab 5 and the conventional roller 4a, (6a) for distributing the load of the user.

On the other hand, the portion where the spring 7 is connected to the face 6a is not provided with the thermal deformation blocking bar 6c, so that the spring 7 is in contact with the face 5a There is a possibility of being deformed by the heat conducted from the hot slab 5 having a high temperature.

5, the crane impact reducing device 6 according to the embodiment of the present invention is a crane crane impact reducing device for crushing a crane crane, which is provided on a boundary surface between the rotating ring 8 and the contact- (9).

That is to say, it is possible to prevent the thermal deformation of the spring 7 by preventing the heat from the contact surface 6a of the ceramic paper 9 in direct contact with the hot slab 5 from being conducted to the spring 7 .

Fig. 6 is a graph showing the effect of applying the ceramic paper of Fig. 5, showing the thermal conduction blocking effect that can be generated by installing the ceramic paper 9 described above.

 More specifically, with respect to the temperature rise of the spring 7 due to the heat conducted at the time when the barrel crane is lowered and the slab 5 is brought into contact with the above-mentioned crane impact suppression device 6, , And the solid paper after the application of the ceramic paper 9 is indicated by a solid line.

Referring to FIG. 6, over time, the temperature condition of the spring 7 shows a difference of more than 100 degrees.

In other words, it can be seen that the apparatus for crushing the impact of the crane crane 6 according to the embodiment of the present invention includes the ceramic paper 9 having a low thermal conductivity, so that the heat conduction to the spring 7 can be blocked more efficiently.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of the invention should be determined only by the appended claims.

O: Offset distance
1: clamping device
2: Cross-rock
3: Encounters
4: Block
4a: Rollers
4b: block supporting surface
5: Slab
6: Shock Absorber
6a: Face to face interview
6b: offset bar
6c: Thermal deformation blocking bar
7: Spring
8: Swivel
9: Ceramic paper

Claims (7)

CLAIMS 1. A shock absorber of a crane for picking up and transporting a slab with a clamping device suspended from the crane,
A block support surface having two column shafts into which blocks are inserted and which support the blocks; And
To compensate for an offset occurring when the clamping device picks up the slab,
A roller arranged to be rotatably driven in a direction of contact between the cross arm of the pinching device and the slab, a spring provided in a planar shape to connect the slip to the slip contact surface and the block supporting surface, And an offset blocking bar for restricting rotation of the slab in a direction perpendicular to a contact direction of the slab,
The block support surface and the roller
And a crane impact reducing device installed on the ground for urging the interview. The method according to claim 1,
Wherein the roller is installed at both ends of the block supporting surface,
The spring
So that the position of the face of the contact pens can be returned to the central portion of the block supporting surface corresponding to the rotational drive of the roller. The method according to claim 1,
The offset blocking bar
And a crankshaft impact reducing device installed between the two pillar shafts so as to be symmetrical with respect to the upper surface of the interview paging ground. The method according to claim 1,
And a thermal deformation blocking bar provided to resist thermal deformation by the slab. 5. The method of claim 4,
The thermal deformation blocking bar
And is provided symmetrically on the upper surface of the interview-prompting paper. The method according to claim 1,
Further comprising a rotation ring provided on an upper surface of said face-to-face contact surface so that said spring is rotatable. The method according to claim 6,
Further comprising a ceramic paper which is provided to resist thermal deformation of the rotary ring by the slab and is provided on an interface between the face to be interviewed and the rotary ring.

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