KR20160113870A - Apparatus for working on heights and mounted on a crane - Google Patents

Abstract

The present invention relates to an aerial work apparatus comprising a bucket arm, a rotary bracket coupled to a front end of the bucket arm to be able to rotate; a fixation shaft extended downward from the rotary bracket to be fixated; a rotary shaft coupled to the circumference of the fixation shaft to be able to rotate with respect to the center of the fixation shaft; and a basket which is coupled to the rotary shaft to be able to rotate the circumference of the fixation shaft with the rotary shaft and on which workers can ride. The aerial work apparatus of the present invention comprises: a support shaft coupled to the circumference of the rotary shaft to be able to rotate with respect to the fixation shaft; a first support arm having one end fixated to the rotary bracket and the other end extended upward from the one end where a first pulley is formed; and a second support arm having one end coupled to the support shaft and the other end extended upward from the one end where a second pulley and a third pulley are formed to face one another. The first pulley, the second pulley and the third pulley are configured to successively wind up a wire of a winch formed at the crane. The first pulley and the second pulley are arranged to be placed on a line extended from the rotational axis of the rotary shaft and the support shaft between the first pulley and the second pulley. The third pulley is arranged to cause an end of the wire to be extended downward from the third pulley.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a crane-

The present invention relates to a high-altitude working apparatus, and more particularly, to a high-altitude work apparatus mounted on a crane used for high-altitude work and including a basket on which an operator is boarded.

At the front of the crane used for the construction work or the repair work of the poles, a high-altitude work device with a basket is mounted and an operator is carried inside the basket to work at the high altitude.

FIG. 1 shows an example of a high altitude work device including such a basket.

Referring to FIG. 1, the elevating work device of the prior art includes a bucket arm 2 coupled to the upper end of the boom frame 1 of a crane, a bucket arm 2 provided at the front end of the bucket arm 2, A pivotal bracket 3 for holding the bucket arm 2 and the hinge bracket 3 so as to maintain a water posture with respect to the ground surface of the basket 7 so that the pivotal bracket 3 rotates relative to the bucket arm 2, A rotary shaft 6 disposed around the fixed shaft 5 and rotatable around the fixed shaft 5, a hydraulic cylinder 4 for preventing the hydraulic cylinder 4 from rotating, a fixed shaft 5 extending downward from the rotary bracket 3, A support base 8 extending horizontally from the rotary shaft 6 and a basket 7 fixed to an end of the support base 8 are attached.

A reduction gear set 90 driven by a handle 91 and having a sprocket 93 attached to an output shaft 92 is provided on the upper surface of the upper support bar 8, and a sprocket 94 is provided on the fixed shaft 5 And a chain 95 is mounted between the two sprockets 93, 94.

Therefore, when the worker on the basket 7 rotates the handle 91, the output shaft 92 rotates and the rotational force is transmitted to the fixed shaft 5 through the sprocket 93, the chain 95 and the sprocket 94 . Since the support shaft 8, the basket 7 and the rotary shaft 6 on which the reduction gear set 90 is mounted are fixed to the fixed shaft 5 As shown in Fig.

In the high-altitude working apparatus of the prior art having such a configuration, the basket 7 is moved to the working position as the boom frame 1 on the crane rises, and the basket 7 has its own weight and the worker And the rotating bracket 3 is rotated about the bucket arm 2 by the weight of the article mounted thereon to maintain the horizontal state.

When the basket 7 reaches the working position, the worker stops the stretching operation of the hydraulic cylinder 4 so that the rotating bracket 3 does not rotate with respect to the bucket arm 2, The basket (7) does not shake. In this state, the operator can work reliably. The operator changes the posture or position of the basket 7 by turning the handle 91 as necessary to rotate the basket 7 about the fixed shaft 5. [

However, such a high-altitude working apparatus according to the related art is useful for an operator simply to ride a basket in a basket with a simple tool or equipment, but for example, this type of high-altitude working apparatus is used for installing an outer wall at a building site of a building , It is difficult to load many wall materials into the basket and move to the upper part of the building under construction by the operator.

Therefore, in the construction site, one of the outer wall materials is loaded on the basket, the worker rides to the work position to perform the outer wall installation work, and the basket is moved to the ground to carry one outer wall material to the work position Repeat. This method of operation is very time consuming.

In another prior art technique, a crane equipped with a basket is in a working position with an operator aboard the basket, and a separate crane should be raised to the work position of the worker on the basket. This operation has the problem that the construction cost is increased because two cranes are used.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a high-performance working apparatus having a basket, And a mechanism for moving the article between the working position and the ground.

Particularly, in the present invention, it is possible to use a winch and a wire provided in a crane on which a high-lift work device is mounted without providing a separate winch and wire in the high-lift work device, To provide a working device.

Further, in the present invention, there is provided a mechanism for moving a product between a working position and a ground on a high-performance work device, but such a mechanism does not limit the operation of the high-performance work device.

The bucket arm includes a bucket arm coupled to an upper end of the crane, a pivot bracket vertically rotatably coupled to a front end of the bucket arm, a fixed shaft extending downward from the pivot bracket and fixed to the pivot shaft, A high altitude working apparatus comprising a rotating shaft rotatably coupled to a fixed shaft and a basket coupled to the rotating shaft and rotatable about the fixed shaft together with the rotating shaft,

A support shaft rotatably coupled to the rotary shaft about the fixed shaft; A first support arm having one end fixed to the rotation bracket and extending upward from the one end and having a first pulley at the other end; And a second support arm having a second pulley and a third pulley disposed opposite to each other at one end thereof coupled to the support shaft and extending upward from the one end,

Wherein the first pulley, the second pulley, and the third pulley are configured to sequentially wind the wires of a winch provided in the crane, wherein the first pulley and the second pulley are configured such that the wire is wound between the first pulley and the second pulley And the third pulley is arranged so that an end of the wire extends downwardly from the third pulley. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The above-described high-altitude working apparatus can raise or lower the article from the working position to the working position by using the wire and winch of the crane on which the high-performance working apparatus is mounted.

In the elevating work device according to the present invention, the bucket arm is attached to the tip of the boom of the crane, and the wire is pulled out from the winch of the crane and wound around the first to third pulleys to be operable.

When the operator is on the basket, the crane rises and the floodgate expands, so that the upper leveling work device rises, and the basket reaches the working position, so that the worker who rides on the basket can work.

The winch of the crane is operated to raise the goods on the ground to the position of the working position or to lower the goods near the working position to the ground. When the winch is reversed to release the wire, the wire descends from the third pulley to the ground, and on the ground another worker attaches the article to the end of the wire. Rotating the winch causes the wire to rise and the wire to rise to the third pulley so that the article attached to the end of the wire can reach the working position of the operator on the basket. The worker removes the item from the end of the wire and does the work, and repeats the previous procedure.

The task of unloading the items placed in the charge can be reversed.

Therefore, according to the present invention, it is possible to operate the winch of the crane so that the basket on which the worker is carried does not need to move between the work position and the ground in order to raise the articles necessary for the work at the high altitude, To the work site of the elevated position or to the ground from the working position.

On the other hand, in the high-lift working apparatus of the present invention, the basket can be rotated with respect to the fixed shaft. Such rotation is accomplished by rotating a rotating shaft to which the basket is attached with respect to the fixed axis of the crane.

In the present invention, a first arm is provided on a rotating bracket to which the fixed shaft is attached, a first pulley is provided on the first arm, a second arm is attached to a supporting shaft that rotates with respect to the fixed shaft, A second pulley and a third pulley are attached, and a wire is mounted between the first pulley and the second pulley.

Accordingly, when the rotating shaft is rotated with respect to the fixed shaft to rotate the basket, the supporting shaft coupled to the rotating shaft also rotates with respect to the fixed shaft, so that the first pulley and the second pulley rotate relative to each other while the wire between the first pulley and the second pulley Twisted or detached from the pulley.

However, in the present invention, since the first pulley and the second pulley are disposed such that the wire disposed between the first pulley and the second pulley is disposed on the extension line of the fixed axis and the rotation axis of the rotation axis, Even if the position of the second pulley relative to the first pulley is changed by rotation, the wire disposed therebetween maintains the position of the extension axis of the support shaft and the rotation axis of the rotation shaft, so that the wire is twisted, There is nothing to worry about.

Further, even when the support shaft to which the second support arm is engaged is rotated relative to the rotation axis to change the position of the wire relative to the basket, the position of the second pulley arranged on the second support arm is changed with respect to the first pulley, The wires disposed between the first pulley and the second pulley maintain their position. Therefore, even when the support shaft is rotated to change the position of the wire relative to the basket, there is no possibility that the wire is twisted or disengaged from the first or second pulley.

As described above, according to the elevator work device of the present invention, a winch and a wire of a crane on which the elevator work device is mounted, without installing a separate winch and wire in the elevator work device, Can be moved.

Therefore, the elevating work device according to the present invention does not require a separate winch and the like while having the article moving mechanism, so that the increase in the weight and the increase in the manufacturing cost are minimized.

Further, in the elevating apparatus according to the present invention, although the wire of the crane is drawn into the elevating apparatus, the wire is twisted or detached from the pulley even when the basket is rotated with respect to the crane or the mechanism guiding the wire is rotated with respect to the basket. It does not happen.

1 is a side view showing a top of a crane equipped with a basket according to the prior art,
2A and 2B are side views showing the top of a crane equipped with a basket according to an embodiment of the present invention,
3 is a perspective view showing a fixed shaft, a rotating shaft and a supporting shaft portion in the crane of FIG. 1,
Fig. 4 is a plan view schematically showing a state in which the basket is rotated in the crane of Fig. 1;

Hereinafter, the configuration and operation of the high-performance working apparatus according to the preferred embodiment of the present invention will be described with reference to FIGS.

The elevating device according to the present embodiment is mounted on a crane mounted on a vehicle such as a truck or equipped with a separate moving means. The crane has a frame supporting the crane at the lower portion thereof, a frame for rotating the crane relative to the vehicle, Hydraulic cylinders that vertically rotate the support column against the ground, and a boom bar provided at the front end of the support bar and extending in the longitudinal direction, and a winch wound with a wire is provided on the frame. The winch is usually connected to a hydraulic circuit for driving the hydraulic cylinders of the crane, and the wire of the winch is guided along the support stand and the boom frame and extends to the tip of the boom frame. The hook is attached.

Since the construction of such a crane is well known in the art, the explanation and illustration thereof will be omitted in the present specification and drawings, and only the specific configuration and operation of the elevating apparatus according to the embodiment of the present invention, Explain.

2A, the elevating device of the present embodiment includes a bucket arm 10 attached to the front end of a boom tower 1 of a crane, a rotation bracket 20 rotatably coupled to the front end of the bucket arm 10, A fixed shaft 21 extending downward from the bracket 20; a rotary shaft 30 rotatably coupled to the fixed shaft 21 while surrounding the fixed shaft 21; a basket 50 attached to the rotary shaft 30; And elements 14, 26, 63, 64 for guiding the wires of the crane.

A pivotal bracket 20 is rotatably coupled to a front end of the bucket arm 10 so as to be rotatable around a hinge 11 of the bucket arm 10 and a hydraulic cylinder 12 to prevent or permit the rotation of the pivot bracket 20 relative to the bucket arm 10 by interrupting or allowing the reciprocating movement of the piston 13 of the hydraulic cylinder 12. [

The position of the bucket arm 1 and the bucket arm 10 fixed to the bucket arm 1 in the course of the movement of the basket 50 to the working position while the boom arm 1 is raised is different from that of the bucket arm 1, And the rotating bracket 20 is rotated about the hinge 11 by the weight of the worker and the goods aboard the basket 50 to maintain a horizontal posture with respect to the ground.

When the basket 50 rises to the working position, the reciprocating motion of the piston 13 of the hydraulic cylinder 12 is blocked so that the basket 50 is not shaken or tilted by the worker's work and the movement of the article, 20 do not rotate about the hinge 11.

A fixing shaft 21 is attached to the lower side of the rotation bracket 20 and extends in a downward direction from the rotation bracket 20.

3, a rotary shaft 30, which is cylindrical and surrounds the fixed shaft 21 and is rotatable about the rotary shaft C, is disposed around the fixed shaft 21, A thrust bearing 22 for supporting the rotary shaft 30 in the vertical direction while allowing rotation of the rotary shaft 30 with respect to the fixed shaft 21 is attached to the lower end of the rotary shaft 30.

2, two connection brackets 31 and 32 are provided on the surface of the rotary shaft 30 in the vertical direction, respectively. The connection brackets 31 and 32 are provided in a direction perpendicular to the rotation axis C, A basket 50 is attached to an end of the basket. The basket 50 is in the form of a bottom surface 51 and four side surfaces 52 so that an operator can ride and load the goods.

The axis of rotation C of the rotary shaft 30 is disposed close to the center of the basket 50. This is because the load of the article loaded on the basket 50 and the operator who is on the basket 50 is transmitted to the fixed shaft 21 and the rotary shaft 30 ) In order to prevent it from acting in a biased manner.

A drive unit 33 including a drive motor and a reduction gear set is provided on the upper side of the connection bracket 31. A sprocket 23 is fixed to an upper portion of the fixed shaft 21, The chain 24 is mounted between the sprocket 35 attached to the output shaft 34 of the fixed shaft and the sprocket 23 of the fixed shaft.

When the drive motor of the drive unit 33 rotates, the rotational force increased by the reduction gear set is transmitted to the fixed shaft 21 through the chain 24 and the fixed shaft 21 is fixed to the rotating bracket 20 The rotary shaft 30 rotates about the fixed shaft 21 without rotating. By this rotation, the basket 50 coupled to the rotary shaft 30 is rotated by the connection brackets 31 and 32 with respect to the fixed shaft 21.

In the present embodiment, the rotary shaft 30 is rotated by the drive unit 33 including the drive motor. However, as described in the prior art, the drive unit is constituted by the reduction gear set operated by the handle, You may.

On the other hand, a first support arm 25 having one end fixed to the pivot bracket 20 and extending vertically is attached to the pivot bracket 20. The first support arm 25 is vertically upwardly extended from the upper end toward the rotation axis C of the fixed shaft 21 and has a first pulley 26 rotatably attached to the end thereof.

A cylindrical support shaft 40 surrounding the rotation shaft 30 is disposed around the rotation shaft 30 so as to be centered about the rotation axis C.

A flange 41 is formed on the lower end of the support shaft 40. A flange 36 fixed to the rotation shaft 30 is disposed below the flange 41 so that the flange 41 of the support shaft is engaged with the flange 41 of the rotation shaft. (36). The flange 36 of the rotary shaft is provided with a fixing hole 37 at a predetermined angular interval around the flange 36. A fixing hole 44 is also formed in the supporting shaft 40, By fastening the bolt 45, the support shaft 40 is fixed so as not to rotate in the circumferential direction with respect to the rotation shaft 30.

The support shaft 40 is fixed to the rotary shaft 30 during the operation but the bolt 45 for fixing the flanges 41 and 36 is released and the support shaft 40 is rotated about the rotary shaft 30, The position can be adjusted.

The support shaft 40 is provided with a fixing bracket 42 projecting from the surface thereof and the fixing bracket 46 is provided with a groove 43 in the vertical direction.

2A, a second support arm 60 is mounted to the groove 43 of the fixing bracket 42. The second support arm 60 includes a vertical arm 61 extending vertically in the vertical direction, And a horizontal arm 62 extending in a direction orthogonal to the vertical arm 61 at the end of the arm 61. One end of the vertical arm 61 is inserted into the groove 43 and fixed by a bolt (not shown), so that when the bolt is released, the vertical arm 61 can be separated from the support shaft 40.

A horizontal arm 62 is fixed to the opposite end of the end of the vertical arm 61 inserted into the groove 43, that is, the upper end. The horizontal arm 62 extends between the end on the side of the rotation axis C and the end on the outside of the basket 50 so that the second pulley 63 and the outer side of the basket 50 And a third pulley 64 is attached to an end portion extending to the second pulley 64. [

A wire 70 drawn out from a winch (not shown) provided on the crane is connected to the first pulley 26 of the first support arm 25 and the second and third pulleys 63 and 64 at both ends of the horizontal arm 62, Is wound. The wire 70 is wound or unwound in accordance with normal or reverse rotation of the winch and is wound or unwound from the winch via the boom frame 1 to the first pulley 23 and the second pulley 63 via the pulley 14 provided on the bucket arm 10. [ And the third pulley 64 in this order.

A hook 71 is attached to an end of the wire 70 so that the hook 70 can be wound and unwound as the winch rotates and the hook 71 can reciprocate from the ground to the position of the basket 50. The hook 71 can be used to directly hang an article to be used by an operator on the basket 50 or to attach other tools for hanging the article. A state in which the wire 70 is wound to raise the article is shown in Fig. 2B.

A second pulley 63 mounted on the horizontal arm 62 is disposed substantially at the upper side of the first pulley 26 at the end of the first support arm 25. The first pulley 26 and the second pulley 26, The positions of the first pulley 23 and the second pulley 63 are determined so that the wire 70 is placed on the rotation axis C between the first and second pulleys 63 and 63. [

4 shows a plan view in which the basket 50 is rotated with respect to the fixed shaft 21 or the bucket arm 10. The first pulley 26 to the second pulley 63, Both the center of the wire 70 at the point where the wire 70 is unwound toward the second pulley 63 and the center of the wire 70 at the point where the wire 70 begins to be wound around the second pulley 63 are located on the extension line of the rotation axis C of the rotation shaft 30. That is, the wire 70 is placed on the rotation axis C between the first pulley 26 and the second pulley 63.

Therefore, when the rotary shaft 30 rotates with respect to the fixed shaft 21, the relative position of the first pulley 26 attached to the fixed shaft 21 and the second pulley 63 attached to the rotary shaft 30 The wire 70 between the first pulley 26 and the second pulley 63 is placed on the rotation axis C of the fixed shaft 21 and the rotation shaft 30 so that the rotation shaft 30 is rotated The position of the wire 70 between the first pulley 26 and the second pulley 63 does not change.

That is, even if the rotating shaft 30 is rotated with respect to the fixed shaft 21 to adjust the position of the basket 50 for the work, the wire 70 is twisted or separated from the first pulley 26 or the second pulley 63 Or the like.

When the bolt 45 for fixing the flange 41 of the support shaft 40 and the flange 36 of the rotation shaft 30 is released and the support shaft 40 is rotated about the rotation axis 30, 63 and the first pulley 26 varies. However, since the wire 70 is placed on the rotation axis C of the rotation shaft 30 and the support shaft 40 between the pulleys 26 and 63, the wire 70 is twisted or the pulleys 26 and 63 are wound, There is no occurrence of the disengagement.

On the other hand, a balance weight 53 is attached to the side surface 52 of the basket 50 outside the side surface 52 to which the connection brackets 31 and 32 are fixed. The balance weight 53 is attached to the side 52 of the basket by a link 54 and a chain 55 which is pivotally coupled to the balance weight 53 and the basket side 52, The chain 55 is disposed above the link 54. One end of the chain 55 is fixed to the balance weight 53 and a hook 56 is provided on the side surface 52 of the basket 50 so that any one of the rings constituting the chain 55 is provided to the hook 56 Respectively. Therefore, the length of the chain 55 mounted between the side surface 52 of the basket and the balance weight 53 can be adjusted.

 2b, when the length of the chain 55 between the side surface 52 of the basket 50 and the balance weight 53 is reduced, the link 54 upwardly rotates so that the balance weight 53 is moved upward When the length of the chain 55 is increased, the link 54 is rotated downward so that the balance weight 53 moves away from the basket 50. In this case,

The worker is carried on the basket 50 so that the weight of the worker applies a biased load to the rotation axis C and the hook 70 of the wire 70 The weight of the article hanging from the third pulley 64 acts downward from the third pulley 64 so that a biased load is also applied. The balance weight 53 is installed in order to balance this biased load.

Since the work of pulling up or down the article by the wire 70 is mainly performed on the opposite side of the side where the rotary shaft 30 is attached, the balance weight 53 (in this embodiment, Is attached to the side surface 52 of the basket 50 to which the basket 50 is attached. Since the distance between the balance weight 53 and the basket 50 is adjusted by the link 54 and the chain 55, when the weight of the heavy weight 53 is raised or lowered, the balance weight 53 is moved from the basket 50 So that the load balance according to the weight of the article can be properly adjusted.

As described above, in the elevator work device of the present embodiment, a separate device such as a winch is not installed in the elevator work device but the winch and the wire of the crane on which the elevator work device is mounted are used to guide the wire to the elevator work device By installing only the supporting elements, it is possible to raise or lower the goods between the working position of the charges and the ground.

Furthermore, in the embodiment of the present invention, even when the basket rotates with respect to the bucket arm or a mechanism such as a pulley that guides the wire rotates with respect to the basket, the wire does not separate or twist in the pulleys guiding the wire.

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 exemplary embodiments, and that various modifications, additions and substitutions are possible, Are within the scope of the present invention.

10: bucket arm 20: pivot bracket
21: fixed shaft 30: rotary shaft
40: support shaft 50: basket
70: wire

Claims (5)

A bucket arm mounted on a crane, comprising: a bucket arm coupled to an upper end of the crane; a pivot bracket vertically rotatably coupled to a front end of the bucket arm; a fixed shaft extending downward from the pivot bracket, And a basket that is rotatable around a fixed axis and is rotatable around the fixed axis and is rotatable around the fixed axis, the basket being coupled to the rotating shaft, the basket being capable of being carried by an operator,
A support shaft rotatably coupled to the rotary shaft about the fixed shaft; A first support arm having one end fixed to the rotation bracket and extending upward from the one end and having a first pulley at the other end; And a second support arm having a second pulley and a third pulley disposed opposite to each other at one end thereof coupled to the support shaft and extending upward from the one end,
Wherein the first pulley, the second pulley, and the third pulley are configured to sequentially wind the wires of a winch provided in the crane, wherein the first pulley and the second pulley are configured such that the wire is wound between the first pulley and the second pulley Wherein the third pulley is disposed so that an end of the wire extends downwardly from the third pulley. ≪ Desc / Clms Page number 13 > [2] The apparatus of claim 1, wherein the first support arm includes a portion extending upwardly from the pivot bracket in parallel with the fixation shaft, and the second support arm has one end coupled to the support shaft, And a horizontal arm extending horizontally at the other end opposite to the one end coupled to the support shaft of the vertical arm, wherein the second pulley and the third pulley are disposed at both ends of the horizontal arm A high altitude working device. The elevating device according to claim 1, wherein a side of the side of the basket near the bucket arm is provided with a balance weight for balancing the load of the article pulled up or lowered by the wire. The balance weight according to claim 3, wherein the balance weight has a link whose one end is rotatably fixed to one side surface of the basket and the other end is rotatably adjustable of the balance weight, one end is fixed to the balance weight, Wherein the balance weight adjusts the length of the wire to adjust the distance from the fixed axis by rotation of the link by including a chain whose length is adjustably fixed to the one side surface. The elevating device according to claim 1, wherein the support shaft and the rotation shaft are provided with means for preventing their relative rotation.

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