JPH0352583Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a method for transporting scrap generated in each process such as pig iron making, steel making, and processing of steel materials to a scrap collection site using a single truck. This invention relates to a dump truck equipped with a cargo handling device.

[Conventional technology]

Scrap generated in each process such as pig iron making, steel making, and processing of steel materials is produced in small lots, so it is not possible to use means of mass transportation as ancillary equipment.

Therefore, in order to accumulate these scraps, the scraps are put into box-shaped scrap storage pallets placed in each process or box-shaped scrap storage pallets with an upwardly sloped bottom plate on the discharge side, and these scrap storage pallets are individually stored. This was done by transporting the scrap to a scrap dumping site. Moreover, the loading work for this purpose requires the use of hands or a rifuger, as the shapes of the scraps are complex and their weights vary widely.

In addition, although cargo handling equipment is used in this work, the pallets placed in various processes such as pig iron making, steel making, and steel processing are affected by the size of the scrap discharged during those processes. Considering the
Because they are designed in various sizes, each process requires dedicated cargo handling equipment, making it impossible to unify cargo handling operations across all processes, which also contributes to inefficiency.

In order to improve this inefficiency, there is a method in which the scrap generated in each steelmaking process and rolling process is collected using small pallets about 3.5 m long and a road lugger.

In this case, some of the small pallets are arranged directly connected to the factory line equipment so that scrap can be directly input through the chute at the scrap generation location.

In order to increase the processing efficiency in this system, it has been considered to increase the size of the small pallets arranged, but this is not practical as it would require major modifications to the line equipment.

In order to solve these problems in scrap accumulation, dump trucks equipped with cargo handling devices have also been proposed.

FIG. 4 shows a conventional dump truck equipped with a cargo handling device and its working condition, and FIG. 5 shows a main part of the cargo handling section viewed from the rear.

In these figures, 1 is a hanging ring for hanging on the trunnion b of the pallet, 2 is a hydraulic winch, and 3 is a hydraulic winch.
is a wire, 20 is an arm, 7 is a cylinder, 21 is a cylinder rod, 8 is a loading platform, 14 is a dump loading box,
16 is a weighing device, 15 is a lifting cylinder, 17 is an outrigger, 18 is a storage platform, 19 is a hydraulic unit, and a is a pallet having a bottom plate sloped upward toward the scrap dumping part at the tip which is the discharge side. be.

Then, as the cylinder rod 21 expands and contracts, the arm 20 lifts up around the fulcrum 22 on the loading platform 8 to move the pallet a, and by winding the wire 3 attached to each winch 2, the pallet a is
It is designed to be tilted and used for loading and unloading of scrap.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional cargo handling equipment, when lifting a pallet with a dump truck, the distance between the hydraulic winch 2 and the pallet a must be adjusted by moving the truck. A guide is required for adjustment.

In addition, the arm 20 must be made long in order to lift and tilt the pallet, and as a result, when working indoors in a factory, the tip of the arm hits a ceiling structure, limiting cargo handling operations. The drawback was that the impact was large when the contents were dropped.

This invention eliminates the above-mentioned drawbacks of conventional dump trucks equipped with pallet lifting devices, and is equipped with a cargo handling device that can efficiently handle scrap of various shapes and sizes without any hindrance. It provides dump trucks.

[Means for solving problems]

The present invention is characterized in that, in the dump truck with a cargo handling device having the above conventional structure, the arm rotatably supporting the swinging beam is formed to be extendable and retractable.

[Effect]

The extension and contraction of the arm by interlocking multiple jibs makes it easy to adjust the position for lifting pallets, eliminating the need to unnecessarily extend the arm when working indoors in a factory, and furthermore, The contents can be dropped close to the bottom of the truck's dump box.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings. Note that the same parts as in the conventional example shown in FIGS. 4 and 5 are given the same reference numerals.

Fig. 1 is an overall side view of one embodiment of the present invention;
The figure is a view of the arm portion seen from the rear of the truck, and FIG. 3 is a view showing the structure of the arm.

In FIG. 1, A is a dump truck with a cargo handling device, and the loading platform 8 of this dump truck includes:
A dump box 14 for storing scraps from pallet a is placed thereon, and in order to measure the weight of the scraps stored in this dump box 14, weighing scales are placed at the four corners of the back side of the loading platform 8 near the lifting cylinder 15. A container 16 is attached. This scale 16
This is prevented from coming into contact with the dump cargo box 14 during travel by lifting cylinders 15 placed at four locations on the cargo platform 8.

In addition, an outrigger 17 is installed on the loading platform 8 to stabilize the loading platform 8 during loading and unloading of scrap.
It is attached at an appropriate location below. Further, a storage platform 18 is arranged in front of the loading platform 8 to keep the hydraulic winch 2, hoist arm 5, cylinder 7, etc., which are cargo handling mechanisms for lifting and lowering pallets, in fixed positions when the truck is running. In addition, the first
In the figure, numeral 19 indicates a hydraulic unit that drives the hydraulic winch 2, cylinder 7, lifting cylinder 15, etc.

The above-mentioned pallet lifting/lowering loading/unloading mechanism uses a hydraulic system for hoisting and lowering a wire 3 with a hanging ring 1 attached to the tip in order to lift and suspend a box-shaped pallet a having a bottom plate with an upward slope on the discharge side. A winch 2 is provided corresponding to each trunnion b of the pallet a.

Two sets of the hydraulic winches 2 are arranged facing each other (arranged on the front, rear, left, and right sides) at the mounting parts on the beams 4 that support them. A connection part is provided at a high position, and the connection part and the hoist arm 5 are pivoted so that they can rotate freely at the connection point, making it swingable. It is arranged so that it can move above 14. The hoist arm 5
The cylinder rod 21 of the cylinder 7 is pivotally supported by the upper part of the fixed arm of the hoist arm 5, and the lower part of the hoist arm 5 and the cylinder 7 has a small vertical turning radius of the hoist arm 5, and
When tilting the dump cargo box 14 of the dump truck, the dump cargo box 14 and the swinging beam 4 supporting the hydraulic winch 2 pivotally supported on the upper end of the hoist arm 5 are in a positional relationship that does not interfere with each other. They are each pivoted approximately at the center of both sides.

Here, the hoist arm 5 has a column shell structure, that is, a first jib 6, a first cylinder 9, and a second jib 1, which are fixed arms.
0, an extension chain 11, a third jib 12, etc.

Further, as described above, the hoist arm 5 is provided with a cylinder 7 for raising and raising the hoist arm 5, and the tip of the cylinder rod 21 is connected to the bracket 23 provided at the tip of the first jib 6.
It is pivoted on.

By operating the first cylinder 9, the second jib 10 and the third jib 12 can be expanded and contracted. That is, the first cylinder 9
By stretching the second jib 10, the third jib 1 is extended by the stretching chain 11.
2 grows. Conversely, by contracting the first cylinder 9, the second jib 10 is contracted, and in conjunction with this, the third jib 12 is contracted by the contraction chain 13.

Next, the operation of this dump truck will be explained to clarify the effect of the present invention.

After stopping the dump truck parallel to the length direction of the pallet a in front of the scrap storage pallet a installed in each process of pig iron making and steel making, the cylinder 7 and the first cylinder 9 are extended and the second The jib 10 and the third jib 12 are extended and the hydraulic winch 2 on the swing beam 4 is moved to the slinging position of the pallet a. Then, the suspension ring 1 provided at the tip of the wire 3 suspended from each hydraulic winch 2 is
Lower the pallet to the position where it can be hung on the trunnions b provided on both sides of the pallet a, and attach each hanging ring 1.
is multiplied by the corresponding trunnion b. Then, the wire 3 is wound up to a position where it does not come into contact with the lower part of the attachment part of the swing beam 4 that supports the hydraulic winch 2. At this time, in order to soften the load component applied to the hoist arm 5 and cylinder 7, the dump truck A is stopped by bringing the rear end of the dump cargo box 14 and the front end of pallet A close to each other to the extent that they do not come into contact with each other. It is preferable.

From this state, move the cylinder rod 21 to cylinder 7.
By pulling it in, the hoist arm 5 is raised, the first cylinder 9 is actuated, the second jib 10 and the third jib 12 are retracted, and the position is set so that the hoist arm 5 does not come into contact with the dump cargo box 14 of the dump truck A with cargo handling equipment. The pallet a is moved to the scrap discharge position while maintaining the hoist arm 5 so that the tip of the hoist arm 5 does not hit the ceiling structure inside the factory or the like.

At this time, the pallet a is supported at four points by the wires 3 attached to each hydraulic winch 2, and the hoist arm 5 is erected without driving the hydraulic winch 2, so the swinging beam 4 swings the pallet a. moves to the scrap ejection position while maintaining the horizontal position.

When the pallet a reaches the scrap discharge position, the retracting operation of the third jib 12 and the second jib 10 is stopped, and the pallet a is moved toward the left trunnion b in Fig. 1 so that the front part of the pallet a, which is the discharge side, is inclined. By driving the hydraulic winch 2 of By appropriately adjusting the retracting or extending operations of the second jib 10 and the third jib 12 and the lowering and hoisting operations of the hydraulic winch 2 in accordance with the Scrap can be ejected by tilting the machine.

Further, by operating the hoist arm 5 in the upright or down position while maintaining or tilting the pallet a, scrap can be thrown over a wide range within the dump cargo box 14. Furthermore, the scrap discharge position can be easily determined in consideration of the size of pallet a.

After inputting the scrap, the hydraulic winch 2 is driven to return the pallet a to the horizontal state, and by extending the cylinder rod 21 from the cylinder 7 and extending the second jib 10 and third jib 12 from the hoist arm 5, the pallet a is returned to its original state. return to position.

Then, after winding down the wire 3 with each hydraulic winch 2 and grounding the pallet a,
Hanging ring 1 from each trunnion b of pallet a
After the wires 3 are removed, each hydraulic winch 2 is used to wind up the wire 3, and the hanging ring 1 is stopped at a predetermined position.

Next, the cylinder rod 21 is pulled into the cylinder 7, the third jib 12 and the second jib 10 are pulled into the hoist arm 5, the hydraulic winch 2 is stored in the storage platform 18, and the dump truck A with the cargo handling device is transferred to the scrap collection site. .

[Effect of idea]

The dump truck of the present invention can provide the following effects.

(1) Since the hoist arm can be extended and contracted, there is no need for fine positioning adjustments using the dump truck itself, making cargo handling operations easier and eliminating the need for a guide.

(2) Since the hoist arm can be extended and retracted, there is no interference with ceiling structures, etc. during indoor work, etc., and the work range is widened. Moreover, the wire can also be shortened.

(3) Since the pallet can be placed close to the bottom of the dump box, the impact when dropping the contents of the pallet can be reduced.

(4) Scrap discharged from each process such as pig iron making, steel making, and processing of steel materials can be easily collected via scrap storage pallets placed in each process.

(5) There is no need to make any design changes to the pallet used at this time, and the retraction operation of the cylinder rod and the lowering and hoisting operations by two sets of hydraulic winches can be controlled in an appropriate correlation. Therefore, the cargo handling mechanism of the present invention can sufficiently handle pallets of various sizes.

(6) The arm that supports the hydraulic winch and the lower part of the cylinder that lifts it up and down are pivoted at the center of the sides of the loading platform that sandwich each cargo box, which not only allows for stable cargo handling, but also reduces the length of the arm. Since the length can be shortened, the capacity of the cylinder attached thereto can be commensurate with the length, and the structure can be made more economical than a structure that is pivoted at the front or rear of the loading platform.

(7) The dump truck of the present invention is fully capable of handling larger pallets, and allows for the mixed loading of many different brands of scrap.

(8) It does not make any changes to the original line work, but it enables efficient collection, transportation, and accumulation of scrap with a single dump truck, resulting in a reduction in the number of personnel, transportation equipment, etc. .

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention. 1st
The figure is an overall side view of one embodiment of the present invention, FIG. 2 is a view of the arm portion seen from the rear of the truck, and FIG. 3 is a view showing the mechanism of the extendable arm.
4 and 5 show conventional examples. Fig. 4 is an overall side view of a conventional dump truck with cargo handling equipment, and Fig. 5 is a view of the arm section seen from the rear of the truck. 1: Hanging ring, 2: Hydraulic winch,
3: wire, 4: beam, 5: hoist arm, 6:
First jib, 7: cylinder, 8: loading platform, 9: first cylinder, 10: second jib, 11: extension chain, 12: third jib, 13: contraction chain, 1
4: Loading box, 15: Lifting cylinder, 16: Weigher, 17: Outrigger, 18: Storage platform, 19:
Hydraulic unit, 20: arm, 21: cylinder rod, A: dump truck with cargo handling device, a: pallet, b: trunnion.

Claims (1)

[Claims for Utility Model Registration] A pair of hoist arms 5 pivotally supported at approximately the center of both sides of the loading platform, a cylinder 7 for raising and lowering the arms 5, and a cylinder 7 at both ends of the same pair of hoist arms 5. The hydraulic winch 2 is equipped with a swinging beam 4 rotatably supported on a shaft, and two sets of hydraulic winches 2 attached to the swinging beam 4. A wire 3 having a removable hanging ring 1 attached to one trunnion of a box-shaped pallet a having two pairs of trunnions protruding at the front and back positions at a distance from each other on both outer surfaces is provided on one trunnion. A dump truck with a cargo handling device, characterized in that the arm 5 is formed to be extendable and retractable.