KR200205695Y1 - Boom assembly for loading commodities of truck - Google Patents

Abstract

The present invention relates to a boom assembly for loading and unloading a ladder vehicle, comprising a multi-stage ladder, a drum winding a wire rope connected through a roller installed on the ladder, and operating the drum clockwise or counterclockwise to extend or fold the ladder. A ladder operation winch, a platform for loading and transporting goods, a platform operation winch for selectively raising and lowering the platform, and a boom assembly for loading and unloading a ladder vehicle comprising a relief cylinder for adjusting an angle of the ladder, Both end portions of the first and second wire ropes are connected to each other by a pair of protruding pieces formed at a predetermined distance so as to be moved to receive more force, while detecting the wire rope in front of the drum as the wire rope descends. Drum stop means for stopping the operation of the drum is provided, the wire wound on the drum or pulley By preventing the entanglement takes place with a force imbalance between the left and right wire rope and prevent damage to the wire rope, it is possible to reduce the loss of the ladder is unnecessary because the power just drum is stopped in the retracted state.

Description

Boom assembly for loading commodities of truck

The present invention relates to a boom assembly for loading and unloading goods of a ladder truck for transporting goods from the ground to a high-rise building, or for transporting the goods from the high-rise building to the ground. This invention relates to a boom assembly for loading and unloading a ladder car in which wire ropes are wound tightly without being entangled by matching the right and left force balance of the wire ropes.

In general, the boom assembly is mounted on the cargo truck to draw power from the engine of the truck and drive the hydraulic pump with the power, and extend the multi-stage ladder by winding a wire by operating a hydraulic winch for ladder extension with oil pumped from the hydraulic pump. In addition, the platform is used to move the platform to a desired position using a hydraulic winch for transporting the platform.

As shown in FIG. 1, the boom assembly 100 of the ladder car includes a ladder 102 via a multi-stage ladder 102 and a ladder wire rope 104 wound around a roller 102a installed on the ladder 102. Expanding ladder operation winch 106, the platform operating winch 110 for loading and lowering the platform 108, the platform 108 to move along the upper surface of the ladder 102, the platform wire rope 112 by loading goods And a relief cylinder 114 for adjusting the angle of the ladder 102.

Here, the ladder operation winch 106 and the platform operation winch 112 is to form a separate hydraulic line to be controlled independently of each other.

On the other hand, although not shown in the drawing, a pair of rollers (102a) are installed symmetrically on the left and right of the ladder 102, and a drum winding the ladder wire rope 104 is installed at the lower end of the ladder 102, the ladder operation As the winch 106 is actuated, the first wire rope 104 is wound around the drum in a clockwise / counter-clockwise direction via a roller so that the ladder 102 moves up and down.

That is, when the hydraulic motor is rotated in the forward direction by the driving of the engine, the drum is rotated in the clockwise direction. The ladder wire rope 104 is wound around the drum, and the multi-stage ladder 102 is unfolded, while the hydraulic motor is reversed. When rotated, the drum rotates counterclockwise, and the ladder 102 is folded while the ladder wire rope 104 is released from the drum.

However, since the boom assembly 100 of the conventional ladder car is fixed to both ends of the ladder wire rope 104 and the upper end of the multi-stage ladder 102, the first wire rope (in the state where the ladder operation winch 106 is operated) If 104 is subjected to more force on one side, one side of the ladder wire rope 104 is tightly wound on the drum and the other side is loosely wound, there was a problem that the wire rope on the loose winding side is tangled . As a result, not only the tangled wire rope is damaged, but also the inconvenience of having to loosen the tangled wire rope and rewind it in order.

In addition, the drum is stopped when the ladder 102 is fully folded so that the wire rope 104 does not continue to loosen, but the conventional boom assembly 100 is provided with a separate means for determining the folded state of the ladder 102. Since the drum 102 is rotated even when the ladder 102 is completely folded, the ladder wire rope 104 has a problem of being released more than necessary.

Accordingly, the present invention has been made to solve the above problems, it is an object of the present invention to provide a boom assembly for loading and unloading the ladder car to minimize the tangling of the wire rope even if the ladder wire rope receives more force from either side.

In addition, the present invention prevents the drum from rotating when the multi-stage ladder is fully folded, so that the ladder wire rope is no longer loosened from the drum, and also stops the driving means, thereby preventing unnecessary waste of power. Another object is to provide an unloading boom assembly.

1 is a schematic view showing a boom assembly for loading and unloading a conventional ladder vehicle;

2 is a schematic configuration diagram of a boom assembly for loading and unloading a ladder vehicle according to the present invention;

Figure 3a is an enlarged bottom view of the portion A of Figure 2, 3b is a schematic view from the front,

FIG. 4 is an enlarged view of a portion B of FIG. 2, illustrating a driving means of a drum;

5 is an operation state of the operation bar in the bracket according to the wound state of the wire rope.

Explanation of symbols on the main parts of the drawings

10: boom assembly 12: ladder

14,15: 1st, 2nd roller 16,17: 1st, 2nd wire rope

18: protrusion 20: ladder operation winch

22: drum 24: hydraulic line

26: operation bar 28: link unit

30: bracket 32: spring

34: limit switch 36: solenoid valve

38: battery 40: platform

42: platform operation winch 44: platform wire rope

46: relief cylinder

In order to achieve the above object, the present invention is provided between the two end portions of the first and second wire ropes connected to each other between a pair of protruding pieces formed at a predetermined distance on the ladder so as to be movable in a direction receiving more force. On the other hand, a drum stop means for stopping the operation of the drum by detecting this as the wire rope is lowered in front of the drum is formed.

The drum stop means includes an operation bar for guiding the wire rope neatly, a contact piece protruding from both ends of the operation bar, one end fixed to the operation bar, and the other end fixed to the bracket so that the wire rope has a constant tension. The spring is applied, the limit switch which is operated when the contact piece is contacted by the restoring force of the spring, characterized in that it comprises a solenoid valve for blocking the hydraulic line in response to the operation signal of the limit switch.

The present invention having such a structure can be prevented from being entangled due to the power imbalance of the wire rope because it can be moved by a predetermined distance from the one of the front end portions of the first and second wire ropes. In addition, when the ladder is fully folded, the contact piece is operated in contact with the limit switch, and as the limit switch is operated, the solenoid valve is operated to block the hydraulic line so that the drum is completely stopped and the wire rope is no longer released from the drum. Will be.

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

2 is a schematic configuration diagram of a boom assembly for loading and unloading a ladder vehicle according to the present invention.

As shown in FIG. 2, the boom assembly 10 includes a multi-stage ladder 12, a ladder operation winch 20 for operating the ladder 12, and a platform 40 moving along the upper surface of the ladder 12. It consists of a platform operating winch 42 for raising and lowering the platform 40 and a relief cylinder 46 for adjusting the angle of the ladder 12.

The first and second rollers 14 and 15 are formed at the left and right sides of the ladders 12, and a drum 22 operating in cooperation with the ladder operation winch 20 is installed between the lower ladders 12. Meanwhile, the first and second wire ropes 16 and 17 are wound on the drum 22 while being connected to each of the first and second rollers 14 and 15. The drum 22 is provided in front of the drum stop means for preventing the first and second wire ropes 16 and 17 from being released in the folded state of the ladder 12.

The platform 40 is configured to move along the upper surface of the ladder 12 via the platform wire rope 44 independently of the unfolding of the ladder 12.

Referring to FIGS. 3A and 3B, a pair of protrusion pieces 18 are formed at an upper center of the ladder 12, and the first, second, and second protrusions 18 are formed between the protrusion pieces 18 via a link member 16a. Two wire ropes 16 are connected, and the first and second wire ropes 16 and 17 are connected to each other by the first and second rollers 14 and 15 installed on the ladders 12 and the drum 22. Wound on).

Here, the first and second rollers 14 and 15 are symmetrically formed around the ladder 12 as well as the rollers 14 and 15 on both sides of the first and second wire ropes 16 and 17. The interference from the force acts at the center line so as to be offset from each other.

The front ends of the first and second wire ropes 16 and 17 are knotted in a circular shape and connected to the link member 18a, and the through holes of the protruding pieces 18 are connected to the first and second wire ropes 16 and 17. Is passed through to move more force in both wire ropes 16 and 17.

The distance between the protrusions 18 is about 12 cm, and the first and second wire ropes 16 and 17 can move about 5 cm to the left and right based on the point where they meet. The link member 18a is supported by the projecting piece 18 so that the first and second wire ropes 16 and 17 are not moved more than 5 cm to either side. Of course, the size of the link member 18a is about 2 cm.

Therefore, the first and second wire ropes 16 and 17 can be moved to either side, so that the wire 22 and the wire ropes 16 and 17 in the drum 22 due to the force imbalance of the first and second wire ropes 16 and 17. It is possible to prevent tangles.

Referring to Figure 4 describes the driving means for operating the ladder 12, the ladder operation winch 20 is to operate in the rising mode, the lowering mode and the neutral mode, the hydraulic line behind the ladder operation winch 20 24 is provided and connects between the drum 22 and the drive means.

Although not shown in the drawings, the driving means comprises a power take-off unit for drawing the power of the engine, a hydraulic motor and a hydraulic line operated by receiving power of the power take-off unit. That is, when the hydraulic motor is operated by the power drawn from the engine, the hydraulic oil of the hydraulic line 24 is moved to the ladder relief cylinder 46, the ladder operation winch 20, and the platform operation winch 42 via the direction control valve. . Of course, the hydraulic line is formed to independently control the ladder operation winch 20 and the platform operation winch 42.

On the other hand, as a drum stopping means, a bracket 30 extending from the ladder 12 and having a long hole 30a formed on both sides thereof is provided in front of the drum 22, and along the long hole 30a of the bracket 30. The operating bar 26 is installed to move.

In addition, the actuating bar 26 has the actuating piece 28 protruding in the horizontal direction on both sides thereof, and guides the first and second wire ropes 16 and 17. Then, one end is fixed to the lower end of the bracket 30, the spring 32 is fixed to the other end is installed on the operation bar (26). Here, the spring 32 serves to impart a constant tension so that the first and second wire ropes 16 and 17 are not struck through the operation bar 26.

In addition, the limit switch 34 is horizontally installed on the ladder side plate 12a so that the contact piece 28 of the operation bar 26 is lowered and connected due to the restoring force of the spring 32.

On the other hand, the solenoid valve 36 is installed in the hydraulic line 24 to operate the limit switch 34 to receive the operating signal to shut off the hydraulic line and return to the reservoir tank (not shown).

Of course, the limit switch 34 and the solenoid valve 36 is operated to receive power from the battery 38.

Hereinafter, the operation will be described in detail with reference to FIGS. 4 and 5 of the present embodiment configured as described above.

When the ladder 12 ascends, the first and second wire ropes 16 and 17 are wound on the drum 22, and the operation bar 26 is formed along the long hole 30a of the bracket 30. , 2 wire rope (16, 17) is raised upward by the thickness. At this time, the spring 32 connected to the operation bar 26 and the bracket 30 is tensioned and applies a constant tension to the first and second wire ropes 16 and 17 from bottom to top. The ropes 16 and 17 are neatly wound on the drum 22. Of course, the contact piece 28 of the operation bar 26 is kept in contact with the limit switch 34.

On the other hand, when the ladder 12 is fully folded, the first and second wire ropes 16 and 17 are released from the drum 22 and under the restoring force of the spring 32, the operating bar 26 is bracket 30. Will descend along the long hole (30a) of. Of course, the operating bar 26 is lowered by the thickness released from the drum 22, the first and second wire ropes 16, 17 are lowered like the operating bar 26 while being kept under tension by the spring (32) do. Then, when the contact piece 28 is in contact with the limit switch 34, the limit switch 34 is operated, thereby operating the solenoid valve 36 to return the hydraulic oil of the hydraulic line to the reservoir tank.

According to the constitution of the present invention, the first and second wire ropes 16 and 17 can be moved by a predetermined distance toward the side where the force is applied from either side of the first and second wire ropes 16 and 17. Tangle due to the power imbalance of the will be prevented.

In addition, the first and second wire ropes 16 and 17 are subjected to a constant force by the spring 32 via the operation bar 26, so that the first and second wire ropes 16 and 17 are drum 22. It winds neatly without getting tangled, and it is untied from the drum 22.

The boom assembly for loading and unloading the goods of the ladder truck according to the present invention as described above can prevent the entanglement caused by the force imbalance between the right and left of the wire rope when the wire rope is wound or unwound on the drum, while the wire rope is connected to the spring. Because of being given a constant tension by winding the drum neatly and loosened it can prevent the tangling secondary. In addition, the drum is stopped when the ladder is fully folded, thereby reducing unnecessary power loss.

Claims (2)

Multi-stage ladder, drum winding wire rope connected by roller installed on the ladder, ladder operation winch to operate the drum clockwise or counterclockwise to expand or fold the ladder, platform to load and transport the goods, In the platform operation winch for selectively raising and lowering the platform, and the boom assembly for the cargo loading of the ladder vehicle consisting of a relief cylinder for adjusting the angle of the ladder, Between the pair of protruding pieces formed at a predetermined distance on the ladder, both end portions of the first and second wire ropes are connected to each other so as to be movable toward more force, while the wire rope descends in front of the drum. The boom assembly for unloading goods of a ladder truck, characterized in that the drum stop means for detecting this by stopping the operation of the drum is formed. 2. The drum stop means according to claim 1, wherein the drum stop means includes an operation bar for guiding the wire rope neatly, a contact piece protruding from both ends of the operation bar, one end fixed to the operation bar, and the other end bracket fixed to the wire rope. A spring that applies a constant tension to the spring, a limit switch that is operated when the contact piece is contacted by the restoring force of the spring, and a solenoid valve for blocking the hydraulic line in response to the operation signal of the limit switch, characterized in that the cargo loading of the ladder Dragon boom assembly.