JPH0353997B2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field to which the invention pertains The present invention relates to a front-end loader with a water injection device, and more specifically, it relates to a front-end loader with a water injection device, and more specifically, to a front-end loader equipped with a water injection device. Water injection for removing deposits such as powder and granular material in the cargo hold to efficiently remove residual ore or residual coal that has adhered to the ship wall surface (ribs, corrugates, rudders, piping groups) after discharge work using a climb shell or unloader, etc. The present invention relates to a front-end loader with a device.

(b) Prior art and its problems A conventional self-propelled vehicle for removing deposits by water injection is as described in Japanese Utility Model Application No. 60-73749, and is shown in Figs. 10 and 11. It has a form like this. That is, FIGS. 10 and 11
In the figure, 103 is a dosa (self-propelled vehicle) for inboard cargo handling that has a two-way blade 105 at the front.
The dozer 103 has an arm device 1 at the rear.
50 and a plunger pump 130 and a head guard 107 under the fixed support base of the arm device 150.
Above, a horizontal hose take-up and reel device 108 for replenishing water to a water storage tank (to be described later), a water storage tank 120 on the side of the driver's cab 106, a driving engine 140, and a plunger pump 130 are installed. A connecting clutch 143 and an arm device 150
a nozzle 155 that sprays water at the tip of the driver's cab 1;
06 is provided with a display switch box 170 and a remote control control box 160, respectively. The arm device 150 is based on a commercially available hydraulic crane unit and has been modified to have a water injection nozzle attached to its tip.The arm device 150 has a hydraulic tank and valve set built into the device, and pressure oil is supplied from the outside. It is a type that can be operated by a swing drive device 151, an arm 154 that can swing and raise and lower by a hydraulic cylinder 157a, and an arm 154 that can swing and raise and lower by a hydraulic cylinder 157b, and an extendable and retractable arm 154 that can be operated by a hydraulic cylinder 157c. Extension arm 15 made operational
2 and an end attachment 156 swingably attached to the tip of the extension arm 152.
The attachment 156 is modified to include a water injection nozzle 155 for injecting water from the plunger pump 130 through a hose 135. This arm device 150 is a control box provided in the driver's cab 106, and includes an arm rotation operation switch, an arm raising/lowering operation switch, an arm extension/retraction operation switch, an attachment raising/lowering operation switch, an attachment rotation switch, and a water jet/lowering switch. This is a telescopic and pivotable arm device that can be operated from the retracted state shown in FIG. 10 to the extended state shown in FIG. 11 by appropriately operating a control box 160 equipped with a stop switch. The plunger pump 130 has a bracket housing 117 fixed to the rear frame 115 of the vehicle via bolts or the like.
It is built into a frame 116 formed inside the vehicle, and its power source is a traveling drive device 140 mounted on the vehicle.
A shaft 142 is attached to the power take-off end 141 from now on.
It is driven via a hydraulic clutch 143 that is connected to the hydraulic clutch 143.

When the vehicle is in operation, the two-way blade 105 of the vehicle 103 gathers powder and granules such as ore and coal to a carry-out position in the hold. At this time, the arm device 150 is folded and stored at the rear of the vehicle 103 as shown in FIG.
The attachment supports each arm and nozzle by operating the arm raising/lowering operation switch of the remote control box 160 in the operator's cab 106, and the arm turning operation switch, the attachment raising/lowering operation switch, and the attachment turning operation switch of the control box 160. to be operated in any direction. Next, the extension arm 152 is extended depending on the height of the residual ore or residual coal adhering to the wall surface, and the nozzle 155 at the tip of the arm is opposed to the wall surface at a desired distance at a required distance (within or outside of 5 m). . In this state, high pressure water is injected from the nozzle 155 to remove deposits from the wall surface.

However, the conventional self-propelled vehicle for removing deposits on walls has the following problems and is not functionally satisfactory.

(1) The arm device with the water injection nozzle is fixedly mounted on the rear of the vehicle, and the two-way blade is also attached to the front of the vehicle so that it cannot be easily removed. Therefore, the vehicle is used as a dedicated working machine and cannot be used for any other work other than work using the two-way blade and water injection device. In addition, when working with a two-way blade, the vehicle is equipped with an arm device equipped with a water injection nozzle, which increases the load on each part of the vehicle due to the increased weight of the vehicle, which accelerates vehicle damage and prevents vehicle vibration and obstacles. There is a high possibility that the arm device will be damaged due to a collision or the like. If the arm device breaks down, the operation of the vehicle itself must be stopped, resulting in a decrease in the operating rate of the vehicle.

(2) As it is a dedicated working machine, the vehicle must be significantly modified, which increases production costs.

(3) Since the arm device is mounted on the rear of the vehicle, visibility from the driver's seat when operating the arm device is poor, leading to operability and safety problems.

(4) Since the water tank is mounted on the vehicle body, the tank capacity is limited due to vehicle balance, and to compensate for the lack of capacity, the vehicle must be equipped with a water replenishment hose and replenish water during work. No. This is not a particular problem when the permanently installed water tank in a modern sea berth is at the same height as the deck of the vessel being held, but in older facilities where the sea berth is lower than the vessel. Supplying supplies was a very tedious task as it required connecting long pipes and pulling them into the ship.

(c) Object of the invention The present invention has been made in view of the above-mentioned conventional circumstances, and has the following objects.

(1) The arm device with a water injection nozzle is detachable from the work vehicle, and can be easily and instantly replaced with other work equipment for onboard cargo handling, such as a two-way blade, allowing use as a general-purpose machine. At the same time, the aim is to improve productivity by shortening the time it takes to unload cargo from the ship's hold, thereby standardizing onboard cargo handling work.

(2) Necessary modifications to the vehicle itself shall be minor.

(3) An arm device with a water injection nozzle and related work equipment can be mounted in a compact manner at the front of the vehicle.

(4) Increase the capacity of the water storage tank to eliminate the need to replenish water during work and improve work efficiency.

(D) Structure of the Invention The present invention comprises an arm device that is rotatably provided with a water injection nozzle at its tip on a support frame, which can be freely extended, extended and rotated; a water storage tank for supplying water to the water injection nozzle; A hydraulic water pump that sends water to a water injection nozzle, and a driver's seat that can operate the arm device to raise, extend, and turn, rotate the water injection nozzle, and eject and stop water from the water injection nozzle. Equipped with a control valve unit equipped with a solenoid valve, the hydraulically operated water pump, arm device, and water injection nozzle are operated by hydraulic pressure from a circuit connected to the working machine hydraulic circuit of the main vehicle by a quick-chuck hose. The water injection device is detachable via a quick coupler attached to the tip of the lift arm.

(e) Effect of the Invention According to the above configuration, the water injection device is attached via a quick coupler attached to the tip of the lift arm of the front-end loader, and the water pump, arm device, and water injection nozzle included in the device are hydraulically operated. Because the hydraulic pressure for operation is received from the work machine hydraulic circuit of the main vehicle through a quick-chuck hose, the device is easy to attach and detach, and can be easily and instantly replaced with other attachments, allowing the work vehicle to be used as a general-purpose machine. It becomes possible.

(F) Embodiment of the Invention FIG. 1 shows a preferred embodiment of the present invention. Reference numeral 1 indicates a front end loader, and a water injection device 32 is connected to the tip of a lift arm 30 of the front end loader via a quick coupler 31. It is installed. Although a tracked front-end loader is shown in this figure, the front-end loader can be either tracked or wheeled, and the drive mechanism can be mechanically driven or hydraulically driven. However, when considering work in a narrow cargo hold, a hydraulically driven vehicle (hydrostatic vehicle) has excellent forward and backward, left and right turning performance.
can be said to be more preferable for the front-end loader of the present invention.

The quick coupler is a well-known device, and its configuration will be briefly explained. As shown in FIG. 2, the quick coupler 31 is attached to the tip of a pair of lift arms 30 and the tip of a tilt link 33, and serves as an intermediary device when attaching an attachment to the lift arm. A lock pin 64 is provided below the shaft 62 and the upper engaging shaft, which can be advanced and retracted horizontally and laterally by a hydraulic cylinder 63 (FIG. 3). On the attachment side, an upper hook 65 and a lower lock pin engagement bracket 66 are provided on the left and right, respectively, and each can be engaged with the upper engagement shaft 62 and the lock pin 64 on the quick coupler 31 side. When attaching the attachment to the vehicle, operate the vehicle's work equipment control lever and raise, lower, and rotate the lift arm 30 and tilt link 33 using their respective hydraulic cylinders to position the attachment above the attachment placed on the ground. Lift the upper engagement shaft 62 of the quick coupler onto the hook 65, then operate the hydraulic cylinder 63 of the quick coupler through a hydraulic circuit branched from the work machine hydraulic circuit to advance the lock pin 64, and lock the bracket 66 of the attachment. It is designed to be inserted into the holder to secure the attachment.
To remove the attachment, follow the procedure in reverse order.

The configuration of the water injection device 32 shown in FIG. 1 will be explained using the partially enlarged view of FIG. 2. A quick coupler hook 65 and a bracket 66 are provided on the back side of the support frame 13, and an arm device 28 that can rise and fall, expand and contract, and rotate freely, and a water injection nozzle 24 (first
(Figure), a water pump 8 that sends water to the water injection nozzle, a hydraulic motor 7 that drives the water pump, and the arm device that can be operated from the driver's seat by lifting, extending, contracting, turning, etc. A control valve unit 60 is mounted on the tower, which includes a solenoid valve for operating the rotation of the water injection nozzle and stopping the water injection from the water injection nozzle.
Note that the arm device 28 provided with the water injection nozzle 24
Since this is the same as the arm device 150 provided with the water injection nozzle 155 described in the prior art, detailed explanation of its configuration will be omitted. The above-mentioned support frame 13 forms a box-type frame that combines a base body 67 at the bottom, strong columns 68 at the four corners, and a pedestal 69 at the top, and supports the above-mentioned water storage tank 9, water pump 8, and hydraulic motor. 7 is fixed inside the support frame, and a control valve unit 60 including an arm device 28 and a solenoid valve is installed on a pedestal 69.
The control valve unit 60 equipped with a solenoid valve is equipped with a switching means that can be operated directly manually or remotely from a control box in the driver's seat using a wired method. However, in reality, it is preferable to operate from the operator's cabin due to water smoke and dust during work.

The swinging, raising and lowering, extension and contraction of the arm device 28 and the rotating operation of the water injection nozzle 24 are performed by hydraulic pressure, but as mentioned above, the arm device, which is a modification of the crane unit, has a built-in hydraulic tank and valve set for self-operation. It can be operated by supplying pressure oil through a hydraulic circuit branched from the working machine hydraulic circuit in the vehicle body. That is, as shown in FIG. 4, the arm device 2 is connected to the work machine hydraulic circuit from the work machine hydraulic pump 3 in the vehicle body via a quick-chuck hose (not shown).
Pressure oil is branched and fed to the control valve unit 60 built into the control box 27, and commands are issued via the control valve unit 60 equipped with solenoid valves based on the operation of switch levers A to F of the control box 27 placed in the driver's seat. Pressure oil is supplied to each cylinder A′, in order to rotate, raise and lower the arm device 28, expand and contract, and rotate the water injection nozzle 24.
It is sent to B', C', D' and actuators E', F'. By using a quick-chuck hose, the hydraulic pressure can be freely connected and disconnected between the working machine hydraulic circuit of the vehicle body and the arm device 28. The control box 27 is also provided with a switch lever G for controlling the jetting and stopping of water from the water jet nozzle 24. Driver seat control box 2
7 and a control valve unit 60 provided with a solenoid valve on the support frame 13 are detachably connected by a wired system.

With the above configuration, the arm device 2 of the water injection device 32
8 and the water injection nozzle 24 at the tip of the arm device can be controlled from the driver's seat facing the front of the vehicle, providing good visibility and improving workability and safety. As shown in the schematic diagram in FIG.
From there, high pressure oil is sent to the hydraulic motor 7 via the three-way control valve 4, the hydraulic block 5, and the quick chuck 6 by the hydraulic pump 3 for the working machine, and the hydraulic motor 7 is operated to drive the water pump 8 via the coupling 11. As a result, the water in the water storage tank 9 is pumped through the hose 25 to the nozzle.
Note that the water pump 8 can be used as a variable displacement pump to save water. The water pump 8 is also provided with a pressure regulator. control valve 4
The operating lever is the aforementioned arm device 28 on the driver's seat.
The water pump 8 is controlled by remote control from the driver's seat, which controls the water jet from the jet nozzle.

Here, to give an overview of the control levers for working equipment located in the driver's seat, as shown in FIG.
In addition to the levers for controlling the lift and tilt link 33, the lever 71 for controlling the engagement and disengagement of the lock pin 64 of the quick coupler 31, the lever 4' for controlling the hydraulic motor 7 for driving the water pump, the arm device control, and the water injection nozzle. 24 remote control switches 27' for water injection/stop control are provided.

As mentioned above, since the water injection device 32 is attached to the tip of the lift arm of the front-end loader, it is possible to increase the capacity of the water storage tank 9 according to the capacity of the vehicle's work equipment, compared to mounting it on the vehicle body. . In such a case, if the water capacity is sufficient for one-hatch work, there will be no need to replenish water during work, and an on-vehicle hose for refilling water can be eliminated. In addition, the movement of the water injection device 32 within the hold hatch is carried out by the lift arm 30 of the tracked loader 1.
Lift the support frame 13 in a state where it is slightly lifted. Support frame 13 during work
Since this is carried out while the vehicle is in contact with the ground, there is no need to worry about excessive loads being applied to various parts of the vehicle, such as the lift arm, so there is an advantage that the vehicle will not be damaged. Note that it is also possible to work with the entire device tilted forward or backward by operating the tilt link 33. This is important for keeping the device level since the surface on which the vehicle is in contact with the ground is not necessarily flat.

Note that when the arm device 28 is being operated in an extended state, there is a high risk that the tip will hit an obstacle and be damaged, so a known proximity sensor 26 is attached to the tip in order to prevent such damage. (Figure 1).

As described above, the water injection device 32 is attached to the tip of the lift arm 30 via the quick coupler 31, and the hydraulic piping between the water injection device 32 and the vehicle body 1 is detachably connected by the quick check hose. Furthermore, since the control valve unit 60 equipped with a solenoid valve for controlling the arm device 28 and the water injection nozzle 24 and the control box 27 in the driver's seat are connected in a detachable wired manner, the water injection device 32 can be connected from the tip of the lift arm. It is said to be easy to remove.

When considering the work of unloading powder and granular material from a ship's ship's storage using a work vehicle, in addition to removing deposits on the walls, it is also necessary to take out the powder and granular material into corners, and as a final step, to remove the powder and granular material from the cargo hold floor. Scraping and cleaning of the remaining powder and granules are generally performed. In order to meet the purpose of such work, it is necessary to install a two-way blade on the vehicle for the work of extracting the inside and corner of powder and granular materials. FIG. 7 shows a state in which the water injection device 32 is removed from the front end loader with the water injection device and a two-way blade 50 provided with a quick coupler hook and a bracket is attached via the quick coupler 31. The two-way blade 50 can have different shapes or lengths depending on the cargo to be handled, such as coal or ore powder. When working with a two-way blade, you only need to operate the loader linkage (lift arm 30 and tilt link 33), that is, only operate the control lever 70 (Fig. 6) that the vehicle is equipped with. Necessary control such as pushing and pulling operations of the blade 50 can be performed, and there is no need to connect hydraulic piping between the two-way blade and the vehicle body. Additionally, since a two-way blade is attached to the end of the lift arm, scraping operations can be easily performed by tilting the blade in a lifted position.

FIG. 8 also shows that the water injection device 32 is removed from the front-end loader equipped with the water injection device, and the quick coupler 31
A rotary brush type floor cleaner 45 (hereinafter referred to as a sweeper) equipped with a quick coupler hook and a bracket is shown attached. The sweeper 45 includes a rear bucket 43B and a front bucket 43A that is pivotally connected to the upper end of the rear bucket 43B and provided on the front surface of the rear bucket. FIG. 9 is a schematic front view of the sweeper with the bottom plate of the front bucket removed, together with a hydraulic circuit diagram. However, FIG. 9 only shows the concept of the device configuration and does not correspond dimensionally to FIG. 8. The front bucket 43A has a hydraulic motor 44 and a coupling 40 for a power transmission shaft from the hydraulic motor 44.
, power transmission gears 41 and 42, and a rotating shaft 47.
A rotating brush 48 attached to a rotating shaft 47 is included. The front bucket 43A is a hydraulic cylinder 46
It can be opened and closed around the pivot shaft 43 with respect to the rear bucket trunk 43B. The rotating brush 48 is made of resin or piano wire. The hydraulic motor 44 is driven by the hydraulic system of the working machine circuit of the vehicle body. That is, the same hydraulic circuit as that connected to the water pump drive hydraulic motor 7 shown in FIG. It is powered by high pressure oil sent through a hose. The hydraulic motor 44 can be controlled by a control valve 4 located at the driver's seat. The driving force of the hydraulic motor 44 is transmitted to the rotating shaft 47 via the coupling 40 and gears 41 and 42, thereby rotating the rotating brush 48. When working, the condition shown in FIG.
With the bucket 43 in a closed state and with the bottom surface of the bucket 43 horizontal, the bucket is brought into contact with the floor,
By moving the vehicle backward or forward while rotating the rotating brush 48 counterclockwise or clockwise, the powder and granules on the floor are removed from the rear bucket 43.
It is swept into B. A rubber butt 49 is attached to the front edge of the bottom of the rear bucket 43B to prevent damage to the floor and improve adhesion to the floor. The powder swept into the rear bucket 43B is removed by rotating the front bucket 43A around the pivot shaft 43 in the opening direction with respect to the rear bucket 43B by the hydraulic cylinder 46.
Moreover, it can be released by dumping the rear bucket 43B. As with the hydraulic motor 44, the hydraulic cylinder 46 is operated using pressure oil led from the working machine hydraulic circuit in the vehicle body by a quick-chuck hose, and its operation is performed by a control lever on the driver's seat. be able to.

As described above, the water injection device, two-way blade, and sweeper can be appropriately replaced and attached to the tip of the lift arm of the front-end loader via the quick coupler.

This section provides an overview of the actual process of unloading bulk powder cargo from a ship's hold. Figure 12 shows the process of unloading powder cargoes such as iron ore and coal from the ship's hold at stages (1) to (7).

(1)-(2): Powder 8 loaded in the hold 80
1 is unloaded to a certain depth by taking in the center part with a rope trolley type Brittian unloader 82.

(2): When 1/3 of the cargo is loaded from the hold, place the front-end loader with a quick coupler attached to the tip of the lift arm into the hold along with the two-way blade, water injection device, and sweeper set.

(3): First, a two-way blade is attached to the front end loader and the unloader performs the work of ejecting to the center where it is easy to take the load and the work of scraping the wall surface. From this stage, if necessary, replace the two-way blade with a water injection device to remove and scrape out the powder and granules stuck in the ribbed corrugates, rudders, pipes, etc. on the hold walls.

(4): When more than half of the cargo has been loaded with the unloader, the two-way blade and water injection device are used again to eject the inside, corner and scrape off the wall surface, and the unloader is used again to unload the cargo.

(5)-(6): Repeat the above process until the cargo is unloaded almost to the bottom of the hold.

(7): Finally, a sweeper is attached to the front end loader to collect the powder and granules left on the bottom plate of the ship.

In this way, the unloading work from the ship's hold is carried out efficiently by the cooperative work of the unloader and front-end loader. In addition, depending on the size of the hold, two front-end loaders may be used to speed up the loading process.
In many cases, it is desirable to put the machines into the hold at the same time and work on them. In this way, the two-way blade is used to eject the powder and granules, the corner is removed, and the wall surface is scraped, and the water jet device is used to remove the deposits on the wall.Then, the two-way blade is used to eject the powder and granules again, and the corner is removed.These operations are repeated to remove the powder and granule. After final loading, a series of onboard cargo handling operations, including floor cleaning using a sweeper, can be performed quickly and efficiently using one or more front-end loaders with quick couplers.

(G) Effects of the Invention As described above, according to the present invention, the water injection device is compactly held on the support frame and attached to the tip of the lift arm of the front-end loader via a quick coupler, and the water pump included in the device is The arm device and water injection nozzle are hydraulically operated and receive operating hydraulic pressure from the work machine hydraulic circuit in the vehicle body through a quick-chuck hose, making the device easy to attach and detach, and can be easily and quickly replaced with other attachments. The front-end loader can now be used as a general-purpose machine. As a result, a general-purpose machine is provided that can perform all onboard cargo handling work quickly and improve productivity. Moreover, the necessary modifications to the vehicle body are as simple as extracting the hydraulic pressure from the working machine hydraulic circuit and attaching a quick coupler hitch to the tip of the lift arm. Additionally, since each attachment is attached to the end of the lift arm of the front-end loader, visibility of the attachments from the driver's seat is improved, improving operability and safety. Furthermore, the capacity of the water storage tank can be increased according to the capacity of the front-end loader's work equipment, improving work efficiency and eliminating the need for a hose for replenishing water during work. Furthermore, since the water injection device equipped with the arm device is removed from the vehicle during other work, there is less risk of damage to the water injection device due to collisions with obstacles or vibrations. In addition, the vehicle can be used not only for cargo handling work on ships, but also for work inside steel works. For example, a bucket with a quick coupler is attached to carry out the original loading, loading onto a dump truck is attached, a sweeper is attached to clean spilled material near the belt conveyor, and a two-way blade is attached to level the ground at a material collection site and raw materials. It has the advantage of being able to efficiently carry out multi-purpose tasks such as supplying to the input port.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a front-end loader with a water injection device according to the present invention, FIG. 2 is a schematic side view showing the configuration of the quick coupler and the main parts of the water injection device, and FIG. 3 is A-A in FIG. 2. cross-sectional view along the line,
Fig. 4 is a schematic diagram showing the control system of the arm device of the water injection device, and Fig. 5 is a schematic diagram of the hydraulic system for the hydraulic motor for driving the water pump of the water injection device. The position of the water pump and hydraulic motor is not accurate. Figure 6 is a schematic diagram showing the control levers installed in the driver's seat, Figure 7 is a schematic side view of a front end loader equipped with a two-way blade in place of the water injection device, and Figure 8 is a schematic diagram showing the water injection device. 9 is a schematic side view of a front end loader with a sweeper attached; FIG. 9 is a schematic diagram showing a front view of the sweeper in FIG. 8 with the bottom plate of the front bucket of the sweeper removed, together with a hydraulic circuit diagram;
However, it only shows the concept of the device configuration and is not dimensionally accurate. Figure 10 is a side view of a conventional self-propelled vehicle for removing deposits by water injection, and Figure 11 is a side view of a conventional self-propelled vehicle for removing deposits by water injection.
FIG. 2 is a front view of FIG. 0 showing the arm device in an extended state; FIG. 12 is a schematic diagram showing the process of onboard cargo handling (unloading) work using an unloader. DESCRIPTION OF SYMBOLS 1...Front end loader, 8...Water pump, 9...Water tank, 13...Support frame, 24...Water injection nozzle, 28...Arm device, 30...Lift arm, 31...Quick coupler, 32 ...Water injection device, 45...Sweeper,
50... Two-way blade, 60... Control valve unit equipped with a solenoid valve.

Claims (1)

[Scope of Claims] 1. An arm device having a rotatable water jet nozzle at its tip on a support frame and capable of undulation, expansion and contraction, and rotation; a water storage tank for supplying water to the water jet nozzle; and a water jet nozzle. A hydraulically operated water pump that sends water to the nozzle, and a solenoid valve that enables operation from the driver's seat to raise, extend, and rotate the arm device, rotate the water injection nozzle, and spray and stop water from the water injection nozzle. The hydraulically operated water pump is equipped with a control valve unit equipped with a
The arm device and water injection nozzle are operated by hydraulic pressure from a circuit connected to the working machine hydraulic circuit of the main vehicle by a quick-chuck hose.The water injection device can be attached and detached via a quick coupler attached to the tip of the lift arm. A front-end loader that features: 2. The front end loader according to claim 1, wherein the water injection device and the two-way blade are replaceably attachable to and detachable from each other via a quick coupler attached to a tip of a lift arm. 3. Claim 1, characterized in that the water injection device, the two-way blade, and the rotary brush type floor cleaner are replaceably attachable to and detachable from each other via a quick coupler attached to the tip of the lift arm. Front-end loader as described. 4. The support frame has a box-type configuration that combines a base at the bottom, strong columns at the four corners, and a pedestal at the top, and the water storage tank and hydraulically operated water pump are inside the support frame, and above the pedestal. 2. A front end loader according to claim 1, wherein a control valve unit including said arm device and a solenoid valve is arranged compactly. 5
The remaining powder and granular material in the hold can be removed by sequentially replacing and installing various working devices such as water injection equipment, two-way blades, and rotating brush floor cleaners through the quick coupler attached to the end of the lift arm of the front-end loader. An onboard cargo handling method characterized in that a front-end loader performs a series of operations including removal of powder adhering to walls, loading and corner loading operations, and floor cleaning operations after loading.