JP7662483B2 - Refuse collection truck - Google Patents

Description

The present invention relates to a garbage collection vehicle.

Conventionally, there is known a garbage collection vehicle that includes a garbage storage box for storing garbage and a garbage dump box connected to the rear of the garbage storage box. The garbage dump box is equipped with a garbage loading device, and garbage dumped into the garbage dump box by the garbage loading device is pushed into the garbage storage box.

For example, as disclosed in Patent Document 1, some refuse collection vehicles are equipped with a function for detecting the full load state of the refuse collection box. The refuse collection vehicle disclosed in this document is equipped with a detection device that detects the vertical distance between the refuse collection box and the differential carrier, and the control device detects the full load state of the refuse collection box based on that distance.

JP 2021-95220 A

At sites where garbage collection work is carried out using garbage collection trucks, there is a demand to pack as much garbage as possible into the garbage collection box in order to carry out garbage collection work efficiently.

The garbage collection vehicle in Patent Document 1 utilizes the fact that the suspension sinks in roughly proportion to the weight of garbage loaded into the garbage collection box, and determines whether the load is full (whether the maximum load has been reached) based on the distance between the garbage collection box and the differential carrier.

On the other hand, since the relationship between the weight and volume of garbage changes depending on the specific gravity and compressibility of the garbage, at garbage collection sites, the opening pressure (relief pressure) of the relief valve in the hydraulic circuit that supplies hydraulic oil to the hydraulic cylinder of the garbage loading device is sometimes used as a guide to determine the full load state of the garbage storage box (whether the garbage storage box is loaded to its maximum capacity).

However, in reality, even after the hydraulic circuit reaches the relief pressure, it is possible to continue to operate the garbage loading device and push garbage into the garbage storage box, making it difficult to accurately determine whether the garbage storage box is fully loaded based on the relief pressure of the hydraulic circuit.

The present invention was devised in consideration of the above-mentioned circumstances, and aims to provide a garbage collection vehicle that can accurately determine the full load state of the garbage collection box.

In order to solve the above problems, a garbage collection vehicle according to a first aspect of the present invention comprises a garbage storage box for storing garbage, a garbage drop box connected to the rear of the garbage storage box, and a garbage loading device for loading the garbage dropped into the garbage drop box into the garbage storage box, the garbage loading device being premised on having a garbage pushing member for pushing the garbage into the garbage storage box while displacing, and a garbage pushing member actuator for driving the garbage pushing member, and further comprising a position detection sensor for detecting arbitrary position information of the garbage pushing member, a pressure sensor for detecting the oil pressure of the hydraulic oil supplied to the garbage pushing member actuator, and a control device for determining the full load state of the garbage storage box based on the position information detected by the position detection sensor and the oil pressure of the hydraulic oil detected by the pressure sensor. The control device determines that the trash storage box is fully loaded when the oil pressure of the hydraulic oil becomes equal to or greater than a predetermined oil pressure threshold and the displacement of the trash storage box per unit time becomes equal to or less than a first predetermined threshold during the process in which the trash pushing member pushes trash into the trash storage box.

In a garbage collection vehicle having such a configuration, while the garbage pushing member is pushing garbage into the garbage storage box, the full load state of the garbage storage box is determined based on the displacement amount per unit time of the garbage pushing member, so that the full load state of the garbage storage box can be determined more accurately than before.

The second aspect of the present invention is a garbage collection vehicle according to the first aspect, which is equipped with an alarm device that notifies information regarding the full load state of the garbage collection box, and the control device may execute an alarm according to the first alarm mode when the oil pressure value of the hydraulic oil becomes equal to or greater than a predetermined oil pressure threshold and the displacement amount of the garbage pushing member per unit time becomes equal to or less than a predetermined first threshold during the process in which the garbage pushing member pushes garbage into the garbage collection box.

A garbage collection vehicle according to a third aspect of the present invention is a garbage collection vehicle according to the second aspect, wherein the control device causes the alarm device to issue an alarm in a second predetermined alarm mode different from the first alarm mode when the oil pressure value of the hydraulic oil becomes equal to or greater than a predetermined oil pressure threshold value during the process in which the garbage pushing member pushes garbage into the garbage storage box, and the amount of displacement of the garbage pushing member per unit time does not become equal to or less than the first threshold value but becomes equal to or less than a predetermined second threshold value.

A garbage collection vehicle according to a fourth aspect of the present invention comprises a garbage storage box for storing garbage, a garbage drop box connected to the rear of the garbage storage box, and a garbage loading device for loading the garbage dropped into the garbage drop box into the garbage storage box. The garbage loading device is based on the premise that it has a garbage pushing member that pushes the garbage into the garbage storage box while displacing, and a garbage pushing member actuator that drives the garbage pushing member, and further comprises a position detection sensor that detects arbitrary position information of the garbage pushing member, a pressure sensor that detects the oil pressure of the hydraulic oil supplied to the garbage pushing member actuator, and a control device that determines the full load state of the garbage storage box based on the position information detected by the position detection sensor and the oil pressure of the hydraulic oil detected by the pressure sensor. The control device may determine that the trash storage box is fully loaded if, during the process in which the trash pushing member pushes trash into the trash storage box, the hydraulic pressure value of the hydraulic oil becomes equal to or exceeds a predetermined hydraulic pressure threshold and the time required for the trash pushing member to make a predetermined displacement becomes equal to or exceeds a predetermined first threshold.

In a garbage collection vehicle having such a configuration, the full load state of the garbage storage box is determined based on the time it takes for the garbage pushing member to make a predetermined displacement during the process of the garbage pushing member pushing garbage into the garbage storage box, so the full load state of the garbage storage box can be determined more accurately than before.

The garbage collection vehicle according to the fifth aspect of the present invention is equipped with an alarm device for alarming information related to the full load state of the garbage collection box in the garbage collection vehicle according to the fourth aspect, and the control device may execute an alarm according to the first alarm mode when the oil pressure value of the hydraulic oil becomes equal to or greater than a predetermined oil pressure threshold and the displacement amount of the garbage pushing member per unit time becomes equal to or less than a predetermined first threshold during the process in which the garbage pushing member pushes garbage into the garbage collection box.

A garbage collection vehicle according to a sixth aspect of the present invention is a garbage collection vehicle according to the fifth aspect, wherein the control device causes the alarm device to issue an alarm in a second predetermined alarm mode different from the first alarm mode when, during the process in which the garbage pushing member pushes garbage into the garbage storage box, the oil pressure value of the hydraulic oil becomes equal to or greater than a predetermined oil pressure threshold and the time required for the garbage pushing member to make a predetermined displacement does not become equal to or greater than the first threshold but becomes equal to or greater than a predetermined second threshold.

The seventh aspect of the present invention is a refuse collection vehicle according to any one of the first to sixth aspects, in which the control device may stop the supply of hydraulic oil to the refuse pushing member actuator when an alarm is issued according to the first alarm mode.

The garbage collection vehicle according to the eighth aspect of the present invention may be a garbage collection vehicle according to any one of the first to seventh aspects, in which the garbage loading device has a rotating plate that picks up the garbage thrown into the garbage dump box, a push plate as the garbage pushing member that pushes the garbage picked up by the rotating plate into the garbage storage box, and a rotation angle sensor for the push plate as the position detection sensor that detects any rotation position of the push plate.

The garbage collection vehicle according to the ninth aspect of the present invention may be a garbage collection vehicle according to any one of the first to seventh aspects, in which the garbage loading device has a compression plate as the garbage pushing member that compresses the garbage put into the garbage input box and pushes it into the garbage storage box, and a distance sensor as the position detection sensor that detects an arbitrary position of the compression plate.

The present invention provides a garbage collection vehicle that can accurately determine the full load state of a garbage collection box.

FIG. 2 is a left side view of the refuse collection vehicle according to the embodiment. FIG. 1 is a schematic diagram showing a garbage loading device according to a first embodiment. FIG. 2 is an enlarged view of part A in FIG. FIG. 4 is a diagram showing a front operating section provided in the driver's cab. FIG. 2 is a hydraulic circuit diagram of the garbage loading device in the first embodiment. FIG. 2 is a control circuit diagram of the refuse collection vehicle according to the first embodiment. 4 is a flowchart showing a flow of control executed by a control device of a sewage collection vehicle according to the first embodiment. 5A to 5C are schematic diagrams illustrating the operation of the garbage loading device in the first embodiment. FIG. 13 is a schematic diagram showing a garbage loading device according to a second embodiment. 13A to 13C are diagrams illustrating each step of the garbage loading operation in the second embodiment. 13A to 13C are diagrams illustrating each step of the garbage loading operation in the second embodiment. 13A to 13C are diagrams illustrating each step of the garbage loading operation in the second embodiment. 13A to 13C are diagrams illustrating each step of the garbage loading operation in the second embodiment. FIG. 11 is a schematic diagram showing a part of a garbage loading device in a second embodiment. FIG. 11 is a hydraulic circuit diagram of a garbage loading device according to a second embodiment. FIG. 11 is a control circuit diagram of a refuse collection vehicle according to a second embodiment. 10 is a flowchart showing a flow of control executed by a control device of a sewage collection vehicle according to a second embodiment.

Below, a garbage collection vehicle according to an embodiment of the present invention will be described with reference to the drawings. In the following description, unless otherwise specified, the "front", "rear", "left" and "right" of the garbage collection vehicle will simply be referred to as "front", "rear", "left" and "right", respectively. In the following description, first, in the first embodiment, a so-called rotating plate type garbage collection vehicle will be described, and in the second embodiment, a so-called press type garbage collection vehicle will be described.

-First embodiment-
1 and 2, a refuse collection vehicle 1 according to the first embodiment is provided with a refuse collection box 3 and a refuse drop box 4 on a chassis 2. The refuse drop box 4 is connected to the rear of the refuse collection box 3, and openings that communicate with each other are provided on the rear face of the refuse collection box 3 and the front face of the refuse drop box 4. The refuse drop box 4 is journaled relative to the refuse collection box 3 via a pivot 6 extending in the left-right direction, and is tilted by driving a pair of left and right tilting cylinders (not shown).

A trash inlet 7 for inserting trash is opened on the back of the trash inlet 4 (see FIG. 2), and the trash inlet 7 is opened and closed by a tailgate 8 that can be raised and lowered. A rear operation unit 11 for operating the trash loading device 13 and other operations is provided on the left side of the trash inlet 7 (see FIGS. 1 and 3). The rear operation unit 11 is provided with various operation buttons such as a loading button B1 and an emergency stop button B2. The rear operation unit 11 is also provided with a full load pilot lamp PL2 and an almost full load pilot lamp PL1 as notification devices that notify information regarding the full load state of the trash storage box 3. When the trash storage box 3 is almost full load, only the almost full load pilot lamp PL1 is lit, and when the trash storage box 3 is full load, only the full load pilot lamp PL2 is lit.

In addition, a front operation unit 16 for performing operations such as discharging garbage is provided in the driver's cab 1a of the garbage collection vehicle 1 (see FIG. 4). The front operation unit 16 is provided with a scraping button 20, a loading/discharging changeover switch SW6, a hopper opening/closing switch SW7, a dump switch SW8, and the like. The front operation unit 16 is also provided with a full load pilot lamp PL2 and an almost full load pilot lamp PL1 as notification devices that notify information regarding the full load state of the garbage storage box 3. When the garbage storage box 3 is almost full load, only the almost full load pilot lamp PL1 is lit, and when the garbage storage box 3 is full load, only the full load pilot lamp PL2 is lit.

As shown in FIG. 2, the inside of the trash bin 4 is provided with a bottom wall 12 where the trash inserted through the trash inlet 7 temporarily accumulates. The bottom wall 12 is formed with a cross section that is roughly semicircular and follows the track of the tip of the rotating plate 14.

The garbage loading device 13 uses the rotation of the rotating plate 14 to scoop up garbage accumulated on the bottom wall 12, and pushes the scooped up garbage into the garbage storage box 3 with the pusher plate 15. A rotating shaft 17 extending in the left-right direction is installed on the lower side of the garbage dump box 4, and the base end of the rotating plate 14 is fixed to this rotating shaft 17. The rotating shaft 17 is rotated by a hydraulic motor 22 (not shown in FIG. 2, see FIG. 5) installed in the garbage dump box 4.

The garbage dump box 4 is provided with a rotation angle sensor 23 for the rotating plate that detects any rotation position of the rotating plate 14. The rotation angle sensor 23 for the rotating plate detects any rotation position of the rotating shaft 17 that rotates integrally with the rotating plate 14, thereby detecting any rotation position of the rotating plate 14. As the rotation angle sensor 23 for the rotating plate, for example, a rotation angle sensor that can detect the rotation position of the end of the rotating shaft 17 over 360° can be used. Furthermore, a rotary encoder or a potentiometer can be used as this rotation angle sensor. A non-contact rotation angle sensor can also be used as the rotation angle sensor.

The pusher plate 15 is fixed to a pivot shaft 18 that is located higher than the rotation shaft 17 in the trash bin 4 and extends in the left-right direction. The pusher plate 15 is provided with an arm portion 19 that extends above the pivot shaft 18, and one end of a pusher cylinder 21 is rotatably connected to the arm portion 19. The other end of the pusher cylinder 21 is rotatably connected to the side wall 4a of the trash bin 4. This allows the pusher plate 15 to rotate in the front-rear direction as the pusher cylinder 21 extends and retracts.

The trash bin 4 is also provided with a pusher plate rotation angle sensor 24 that detects the rotation position of the pusher plate 15. The pusher plate rotation angle sensor 24 detects any rotation position of the pivot shaft 18 that rotates integrally with the pusher plate 15, thereby detecting any rotation position of the pusher plate 15. As the pusher plate rotation angle sensor 24, for example, a rotation angle sensor that can detect the rotation position of the end of the pivot shaft 18 over 360° can be used. Furthermore, a rotary encoder or a potentiometer can be used as this rotation angle sensor. A non-contact rotation angle sensor can also be used as the rotation angle sensor.

<Control system of rotary plate type garbage loading device>
Next, a control system for operating the garbage loading device 13 will be described with reference to Figures 5 and 6. This control system includes a hydraulic circuit for controlling the hydraulic pressure supplied to the hydraulic motor 22, the pushing cylinder 21, etc. of the garbage loading device 13, and a control device PLC (Programmable Logic Controller) for outputting a control signal to a control valve unit 31 provided in this hydraulic circuit.

First, the hydraulic circuit will be described with reference to FIG. 5. This hydraulic circuit includes a hydraulic pump P, an oil reservoir T, a control valve unit 31, and a pressure sensor 32. Driving force is transmitted to the hydraulic pump P by a PTO (power take-off) that extracts power from the travelling engine E of the refuse collection vehicle 1. The pressure sensor 32 is provided to detect the hydraulic pressure of the hydraulic oil supplied to the pushing cylinder 21, and in this embodiment, is provided between the discharge side of the hydraulic pump P and the control valve unit 31.

The control valve unit 31 includes a plurality of electromagnetic control valves, a relief valve RV, etc. The control valve unit 31 supplies hydraulic oil from the hydraulic pump P to the rod side oil chambers of the pair of left and right pushing cylinders 21 in accordance with a predetermined control signal from the control device PLC. On the other hand, the control valve unit 31 supplies hydraulic oil from the hydraulic pump P to the head side oil chambers of the pair of left and right pushing cylinders 21 in accordance with another predetermined control signal from the control device PLC. The relief valve RV regulates the maximum hydraulic pressure generated within the control valve unit 31.

When hydraulic oil is supplied to the head side oil chamber, the pair of left and right push-in cylinders 21 expand, rotating the push-in plate 15 forward. On the other hand, when hydraulic oil is supplied to the rod side oil chamber, the pair of left and right push-in cylinders 21 contract, rotating the push-in plate 15 backward.

The control valve unit 31 can supply hydraulic oil from the hydraulic pump P to the forward oil chamber of the hydraulic motor 22 in accordance with a predetermined control signal from the control device PLC, thereby rotating the hydraulic motor 22 in the forward direction. On the other hand, the control valve unit 31 can supply hydraulic oil from the hydraulic pump P to the reverse oil chamber of the hydraulic motor 22 in accordance with another predetermined control signal from the control device PLC, thereby operating the hydraulic motor 22 in the reverse direction.

Next, the input and output of signals to the control device PLC will be described with reference to FIG. 6. First, power is supplied to the control device PLC by a battery BT. An ignition switch SWK, a PTO switch SWP, a relay coil R1, etc. of the garbage collection vehicle 1 are connected to a current carrying line K2 that extends from the positive terminal of the battery BT to the right side of FIG. 6 and leads to a ground line K1.

The upstream end of the current carrying line K3 is connected between the ignition switch SWK and the battery BT on the current carrying line K2, and a contact (relay switch) r1 of the relay coil R1 is provided midway along the current carrying line K2. The main power supply lamp PL is provided downstream of the contact r1 on the current carrying line K3. When the relay coil R1 is excited and the contact r1 is closed, the current carrying line K3 is energized and the main power supply lamp PL lights up.

The upstream end of the current carrying line K4 is connected between the contact r1 and the main power lamp PL in the current carrying line K3. This allows power to be supplied to the signal power supply section (not shown) of the control device PLC. In other words, when the contact r1 is closed, power is supplied to the control device PLC via the current carrying lines K3 and K4.

Furthermore, the control device PLC is energized by the energizing line K5 branching off from the energizing line K4 while the garbage loading device 13 is in operation. In other words, the energizing line K5 is a line for inputting a so-called loading continuation signal, and is provided with the emergency stop button B2 provided on the rear operation unit 11 on the left side of the garbage dump box 4, and the switches SW1 to SW3 that are opened and closed in response to the operation of the emergency stop button (not shown) and emergency stop plate (not shown) provided on the rear right side of the garbage dump box 4. When the electricity (i.e., input of the loading continuation signal) is cut off by these switches SW1 to SW3, the control device PLC stops the electricity supply to the electromagnetic control valve of the control valve unit 31, and the control valve unit 31 stops the supply of hydraulic oil from the hydraulic pump P to the pushing cylinder 21 and the hydraulic motor 22.

In addition, multiple branch lines are connected to the current carrying line K4, and the above-mentioned rotating plate rotation angle sensor 23, pushing plate rotation angle sensor 24, and pressure sensor 32 are interposed in each of these branch lines. Signals from the rotating plate rotation angle sensor 23 and the pushing plate rotation angle sensor 24 are input to the control device PLC, and based on these signals, any rotation position of the rotating plate 14 of the garbage loading device 13 is detected, and any rotation position of the pushing plate 15 is detected. In addition, a signal from the pressure sensor 32 is also input to the control device PLC, and based on this signal, the hydraulic pressure of the hydraulic oil supplied to the pushing cylinder 21 and the hydraulic motor 22 is detected.

In addition to the above-mentioned rotating plate rotation angle sensor 23 and pushing plate rotation angle sensor 24, the input side of the control device PLC is electrically connected to a loading switch SW5 (a switch linked to the loading button B1) for causing the garbage loading device 13 to perform the garbage loading operation, a loading/discharging changeover switch SW6 for switching between the garbage loading operation and the garbage discharging operation, a switch SW7 for tilting and opening the garbage input box 4, a switch (not shown) for selecting single or continuous garbage loading operation, and a switch (not shown) for operating the rotating plate 14 and the pushing plate 15 alone. The loading/discharging changeover switch SW6 is provided at the branch position where the current carrying line K5 branches off from the current carrying line K4, and the current carrying line K5 is connected to the loading side of the loading/discharging changeover switch SW6.

As described above, the various switches are connected to the input side, while the output side of the control device PLC is connected to the solenoids of the multiple electromagnetic control valves included in the control valve unit 31 described above. The output side of the control device PLC is also connected to the full load pilot lamp PL2 and nearly full load pilot lamp PL1 provided in the rear operating unit 11, and the full load pilot lamp PL2 and nearly full load pilot lamp PL1 provided in the front operating unit 16, and controls the lighting of these lamps.

The control device PLC is programmed to output signals to the corresponding solenoids to operate the hydraulic motor 22, the push cylinder 21, etc. according to a preset procedure based on signals input from the rotating plate rotation angle sensor 23, the pushing plate rotation angle sensor 24, the pressure sensor 32, the switches SW1 to SW7, etc., and to turn on the full load pilot lamp PL2 or the nearly full load pilot lamp PL1 under certain conditions described later.

For example, when the garbage loading device 13 performs a garbage loading operation, the ignition switch SWK and the PTO switch SWP on the current line K2 are both turned on, and the relay coil R1 is excited. This closes the contact r1 of the relay coil R1, and power is supplied to the control device PLC through the current lines K3 and K4. As a result, the control device PLC becomes operable and outputs various control signals to the control valve unit 31 as appropriate based on the input of operation signals from various operation switches such as the loading switch SW5.

In response to this control signal, the control valve unit 31 supplies hydraulic pressure to the hydraulic motor 22, the pushing cylinder 21, etc. This causes the hydraulic motor 22, the pushing cylinder 21, etc. to operate according to a predetermined procedure, and the rotating plate 14 and the pushing plate 15 operate in coordination with each other to perform the garbage loading operation.

<Control of Rotating Plate Type Garbage Loading Operation>
The garbage collection vehicle 1 according to this embodiment has a function of informing an operator of information regarding the full load state of the garbage storage box 3. Specifically, during the process in which the pusher plate 15 rotates forward to push the garbage into the garbage storage box 3 after the rotating plate 14 performs an operation of scooping up the garbage, if the hydraulic pressure value of the hydraulic oil supplied to the pusher cylinder 21 becomes equal to or greater than a predetermined hydraulic pressure threshold value PR0 and the displacement amount (rotation angle) of the pusher plate 15 per unit time is equal to or less than a first threshold value Tθ1, the control device PLC determines that the garbage storage box 3 is in a full load state and causes the notification device to execute a notification in a first notification mode. In this embodiment, the notification device is composed of a full load pilot lamp PL2 and an almost full load pilot lamp PL1, and the first notification mode is the lighting of the full load pilot lamp PL2 and the extinguishing of the almost full load pilot lamp PL1. The above-mentioned hydraulic pressure threshold value PRO can be set to, for example, the relief pressure of the relief valve RV or a pressure close to the relief pressure.

In addition, during the process in which the pusher plate 15 rotates forward to push the trash into the trash storage box 3 after the rotating plate 14 has performed the operation of scooping up the trash, if the hydraulic pressure value of the hydraulic oil supplied to the pusher cylinder 21 becomes equal to or greater than the hydraulic pressure threshold value PR0 and the displacement amount (rotation angle) of the pusher plate 15 per unit time does not become equal to or less than the first threshold value Tθ1 but becomes equal to or less than a predetermined second threshold value Tθ2, the control device PLC causes the alarm device to issue an alarm in a predetermined second alarm mode different from the first alarm mode. In this embodiment, the second alarm mode is the turning off of the full load pilot lamp PL2 and the lighting of the nearly full load pilot lamp PL1. In the above, the first threshold value Tθ1 is a value smaller than the second threshold value Tθ2.

The values of the hydraulic threshold value PR0, the first threshold value Tθ1, the second threshold value Tθ2, etc. are values that are set in advance in the control device PLC. Appropriate values for these setting values can be obtained, for example, by practical testing, simulation, etc.

Whether an alert is given by the first alert mode or the second alert mode, the hydraulic circuit has reached or is close to the relief pressure, meaning that the garbage storage box 3 is fully loaded or nearly fully loaded. During garbage loading work, the second alert mode can first notify the worker that the garbage storage box 3 is nearly fully loaded, and then the first alert mode can notify the worker that the garbage storage box 3 is fully loaded.

The processing operations performed by the garbage loading device 13 will be explained below with reference to the flowchart in Figure 7.

First, in step S1, when an operator switches the PTO switch SWP from off to on, the power supply to the control device PLC is turned on.

Next, in step S2, the control device PLC determines whether the loading/unloading switch SW6 is switched to the loading side. If the loading/unloading switch SW6 is switched to the loading side (S2: YES), the process proceeds to step S3.

In step S3, the control device PLC determines whether the loading switch SW5 is turned on by pressing the loading button B1. If the loading switch SW5 is turned on (S3: YES), the process proceeds to step S4.

In step S4, the control device PLC starts the garbage loading operation using the rotating plate 14 and the pushing plate 15.

In the garbage loading operation of step S4, first, as the initial state of the cycle, the rotating plate 14 is in the "normal rotation end position" facing forward almost horizontally (see rotating plate 14 shown by solid lines in FIG. 2), and the pushing plate 15 is in a state of rotating to the "pushing end position" forward (see pushing plate 15 shown by solid lines in FIG. 2). From this initial state, the rotating plate 14 starts rotating forward (clockwise rotation in FIG. 2), and when the rotating plate 14 passes the "pushing plate return start position" (for example, the position of the rotating plate 14 shown by the two-dot chain line in FIG. 2), the pushing plate 15 starts rotating backward, and then the pushing plate 15 reaches the "return end position" shown by the two-dot chain line in FIG. 2 and stops. At this time, the rotating plate 14 continues to rotate forward, scooping up the garbage accumulated on the bottom wall 12, and reaches the "normal rotation end position" and stops. The pushing plate 15 then rotates forward to perform a process (pushing process) of pushing the trash scooped up by the rotating plate 14 into the trash storage box 3.

In step S5, the control device PLC determines whether the garbage loading operation is a pushing process. If the garbage loading operation is a pushing process (S5: YES), the process proceeds to step S6. If the garbage loading operation is not a pushing process (S5: NO), the process returns to step S4 and the garbage loading operation continues.

In step S6, the control device PLC determines whether the hydraulic pressure of the hydraulic oil supplied to the head side oil chamber of the pushing cylinder 21 is equal to or greater than the hydraulic pressure threshold value PR0 based on the signal input from the pressure sensor 32. If the hydraulic pressure is equal to or greater than the hydraulic pressure threshold value PR0 (step S6: YES), the process proceeds to step S7. If the hydraulic pressure is less than the hydraulic pressure threshold value PR0 (step S6: NO), the process proceeds to step S10.

In step S7, the control device PLC determines whether the forward rotation angle Δα of the push plate 15 per unit time (the rotation angle (displacement) from the push plate 15 shown by the solid line in FIG. 8 to the push plate 15 shown by the two-dot chain line) is equal to or less than the second threshold value Tθ2. If the rotation angle Δα is equal to or less than the second threshold value Tθ2 (step S7: YES), the process proceeds to step S8. If the rotation angle Δα exceeds the second threshold value Tθ2 (step S7: NO), the process proceeds to step S10.

In step S8, the control device PLC determines whether the rotation angle Δα per unit time of the pushing plate 15 is equal to or less than the first threshold value Tθ1. If the rotation angle Δα is equal to or less than the first threshold value Tθ1 (step S8: YES), the process proceeds to step S13. If the rotation angle Δα exceeds the first threshold value Tθ1 (step S8: NO), the process proceeds to step S9.

In step S9, the control device PLC determines that the garbage storage box 3 is nearly full, and turns on the nearly full pilot lamp PL1 without turning on the full pilot lamp PL2. These pilot lamps PL1 and PL2 are provided on the rear operating unit 11 and the front operating unit 16, so that the operator loading garbage and the operator in the cab 1a can be informed that the garbage storage box 3 is nearly full.

Next, in step S10, the control device PLC determines whether one cycle of the garbage loading operation has been completed. If one cycle of the garbage loading operation has been completed (step S10: YES), the process proceeds to step S11. If one cycle of the garbage loading operation has not been completed (step S10: NO), the process returns to step S4.

In step S11, the control device PLC causes the garbage loading device 13 to stop the garbage loading operation. In other words, the garbage loading operation is stopped in a state where more garbage can be loaded into the garbage storage box 3.

After that, in step S12, if the operator switches the PTO switch SWP from on to off (step S12: YES), the control device PLC ends this control routine, and if the operator does not switch the PTO switch SWP from on to off (step S12: NO), the control device PLC returns to step S2.

Meanwhile, in step S13, the control device PLC determines that the garbage storage box 3 is fully loaded, and turns on the fully loaded pilot lamp PL2 without turning on the nearly fully loaded pilot lamp PL1. These pilot lamps PL1, PL2 are provided on the rear operating unit 11 and the front operating unit 16, so that the operator loading garbage and the operator in the cab 1a can be informed that the garbage storage box 3 is fully loaded.

Next, in step S14, the control device PLC causes the garbage loading device 13 to stop the garbage loading operation. In other words, the garbage loading operation is stopped when the garbage storage box 3 is fully loaded.

Then, when the operator switches the PTO switch SWP from on to off (step S15: YES), the control device PLC ends this control routine.

-Modification of the first embodiment-
It is also possible to adopt a modified example in which steps S7 and S8 in the above embodiment are modified as follows.

In step S7 in the first embodiment, the control device PLC determines whether the rotation angle Δα per unit time of the pushing plate 15 is equal to or less than the second threshold value Tθ2. Instead, the control device PLC proceeds to step S8 if the time ΔT required for the pushing plate 15 to rotate a predetermined rotation angle is equal to or greater than the second threshold value TT2 (step S7: YES), and proceeds to step S10 if the time ΔT is less than the second threshold value TT2 (step S7: NO).

In addition, in step S8 in the first embodiment, the control device PLC determines whether the rotation angle Δα per unit time of the pushing plate 15 is equal to or less than the first threshold value Tθ1. Instead, the control device PLC proceeds to step S13 if the time ΔT required for the pushing plate 15 to rotate a predetermined rotation angle is equal to or greater than the first threshold value TT1 (step S8: YES), and proceeds to step S9 if the time ΔT is less than the first threshold value TT1 (step S8: NO).

-Second embodiment-
Hereinafter, a garbage collection vehicle according to a second embodiment of the present invention will be described with reference to the drawings. In the description of the second embodiment, differences from the garbage collection vehicle 1 according to the first embodiment will be described, and the same components as those of the garbage collection vehicle 1 according to the first embodiment will be denoted by the same reference numerals in the drawings, and the description thereof may be omitted.

As shown in FIG. 9, the refuse collection vehicle 1A according to the second embodiment also has a refuse storage box 3A and a refuse input box 4A mounted on a chassis (not shown). As in the first embodiment, the refuse input box 4A is connected to the rear of the refuse storage box 3A, and the rear face of the refuse storage box 3A and the front face of the refuse input box 4A are provided with openings that communicate with each other.

First, the garbage loading device 13A installed inside the garbage bin 4A in the second embodiment will be described. As shown in Figures 9 and 10, guide groove members 41 are laid from the upper front to the lower rear on both side walls of the garbage bin 4A, and serve as reinforcing frames. A sliding plate 42 that extends across the entire width of the garbage bin 4A is housed inside the garbage bin 4A. Guide rollers 43 are rotatably provided above and below both side edges of this sliding plate 42. These guide rollers 43 are fitted into the inner walls of the guide groove members 41 so that they can slide freely.

The sliding plate support shaft 45 is inserted into bosses 44 provided on the left and right ends of the upper back surface of the sliding plate 42. This sliding plate support shaft 45 is positioned so that it matches the sliding distance of the sliding plate 42 and protrudes beyond the sliding opening 46 (see Figure 10) formed in the side wall of the trash bin 4A from the inside to the outside of the trash bin 4A.

A sliding cylinder 49 is connected between the sliding plate support shaft 45 protruding outward from the side wall of the trash bin 4A and the bottom of the trash bin 4A, and is provided outside the trash bin 4A along the inclination direction of the guide groove member 41 (see FIG. 10). The sliding cylinder 49 includes a rod-shaped cylinder rod 49a and a cylindrical cylinder tube 49b attached to the side wall of the trash bin 4A. The sliding cylinder 49 reciprocates up and down along the guide groove member 41 by the extension and contraction of the sliding cylinder 49.

As shown in FIG. 9, a compression plate 50 that spans the entire width of the trash bin 4A is supported at the lower end of the sliding plate 42 via a support shaft 48 so that it can swing back and forth. The tip of this compression plate 50 is slightly bent forward. A swing cylinder 51 is connected between a connection portion 50a protruding from the back surface of the compression plate 50 and a sliding plate support shaft 45 provided at the top of the back surface of the sliding plate 42, and the compression plate 50 swings back and forth due to the extension and contraction of this swing cylinder 51.

As configured as described above, as shown in Figures 9A to 9D, the garbage loading device 13A is configured to load garbage that has been thrown into the garbage dump box 4A through the garbage inlet 7 into the garbage storage box 3A by operating the sliding plate 42 and compression plate 50 in one cycle of inversion, lowering, compression and ascending processes through the extension and retraction of the sliding cylinder 49 (not shown in Figures 9A to 9D) and the swinging cylinder 51.

As shown in FIG. 9, the dust collection box 3A is equipped with an ejection device 53 that ejects dust from the dust collection box 3A. Specifically, an ejection plate 54 is disposed inside the dust collection box 3A so that it can slide back and forth. The ejection plate 54 is a plate-shaped body formed to be approximately the same size as the width and vertical height of the dust collection box 3, and slides back and forth inside the dust collection box 3A by the extension and contraction of the ejection cylinder 55.

As shown in FIG. 10, the garbage loading device 13A is equipped with a distance sensor 56 that detects an arbitrary extension amount of the sliding cylinder 49 on the left side in the vehicle width direction, for example. Based on a signal input from the distance sensor 56 to the control device PLC, an arbitrary extension amount of the sliding cylinder 49 is detected, and an arbitrary position of the compression plate 50 that moves up and down with the extension and contraction operation of the sliding cylinder 49 is also detected. As the distance sensor 56, for example, one that can detect the extension amount over the entire stroke of the sliding cylinder 49 can be used. Also, an optical distance sensor can be used as this distance sensor 56. The distance sensor 56 is attached to the side wall of the garbage input box 4A via a bracket 56a, and measures the distance to a sensing surface 57 provided at the end of the cylinder rod 49a, and the measurement signal is input to the control device PLC.

As shown in FIG. 9, a rotation angle sensor 58 for the compression plate 50 is provided near the support shaft 48 of the compression plate 50 to detect any swing position of the compression plate 50 (the rotation position of the compression plate 50 relative to the lower end of the sliding plate 42). A signal from the rotation angle sensor 58 for the compression plate is input to the control device PLC, and any swing position of the compression plate 50 and any stroke position of the swing cylinder 51 are detected.

<Control system of press-type garbage loading device>
Next, a control system for operating the press-type garbage loading device 13A will be described with reference to Figures 11 and 12. This control system includes a hydraulic circuit for controlling the hydraulic pressure supplied to the sliding cylinder 49, the swinging cylinder 51, etc. of the press-type garbage loading device 13A, and a control device PLC (programmable logic controller) for outputting a control signal to the control valve unit 31A provided in this hydraulic circuit.

First, the hydraulic circuit will be described with reference to FIG. 11. Like the hydraulic circuit in the first embodiment, this hydraulic circuit also includes a hydraulic pump P, an oil reservoir T, a pressure sensor 32, and a control valve unit 31A. Driving force is transmitted to the hydraulic pump P by a PTO that extracts power from the travelling engine E of the refuse collection vehicle 1A. The pressure sensor 32 is provided to detect the hydraulic pressure of the hydraulic oil supplied to the oscillating cylinder 51, and in this embodiment, it is provided between the discharge side of the hydraulic pump P and the control valve unit 31A.

The control valve unit 31A includes a plurality of electromagnetic control valves, a relief valve RV, etc. The control valve unit 31A supplies hydraulic oil from the hydraulic pump P to the rod side oil chambers of the pair of left and right sliding cylinders 49 in accordance with a predetermined control signal from the control device PLC. On the other hand, the control valve unit 31A supplies hydraulic oil from the hydraulic pump P to the head side oil chambers of the pair of left and right sliding cylinders 49 in accordance with another predetermined control signal from the control device PLC.

When hydraulic oil is supplied to the head side oil chamber, the pair of left and right sliding cylinders 49 expand, moving the sliding plate 42 and compression plate 50 upward. On the other hand, when hydraulic oil is supplied to the rod side oil chamber, the pair of left and right sliding cylinders 49 contract, moving the sliding plate 42 and compression plate 50 downward.

The control valve unit 31A supplies hydraulic oil from the hydraulic pump P to the rod-side oil chamber of the oscillating cylinder 51 in accordance with a specific control signal from the control device PLC. On the other hand, the control valve unit 31A supplies hydraulic oil from the hydraulic pump P to the head-side oil chambers of the pair of left and right oscillating cylinders 51 in accordance with another specific control signal from the control device PLC.

When hydraulic oil is supplied to the head-side oil chamber, the pair of left and right oscillating cylinders 51 expand, causing the compression plate 50 to oscillate forward. On the other hand, when hydraulic oil is supplied to the rod-side oil chamber, the pair of left and right oscillating cylinders 51 contract, causing the compression plate 50 to oscillate backward.

Next, the input and output of signals to and from the control device PLC will be described with reference to FIG. 12. However, only the differences from the circuit diagram (FIG. 6) described in the first embodiment will be described, and descriptions of similar parts may be omitted.

In this circuit diagram, the control device PLC is energized by the energizing line K5 branching off from the energizing line K4 while the garbage loading device 13A is in operation. In other words, the energizing line K5 is a line for inputting a so-called loading continuation signal, and is provided with the emergency stop button B2 provided on the rear operation unit 11 on the left side of the garbage dump box 4A, and the switches SW1 to SW3 that are opened and closed in response to the operation of the emergency stop button (not shown) and emergency stop plate (not shown) provided on the rear right side of the garbage dump box 4A. When the energizing (i.e., input of the loading continuation signal) is cut off by these switches SW1 to SW3, the control device PLC stops the energization of the electromagnetic control valve of the control valve unit 31A, and the control valve unit 31 stops the supply of hydraulic oil from the hydraulic pump P to the sliding cylinder 49 and the swinging cylinder 51.

In addition, a distance sensor 56, a compression plate rotation angle sensor 58, and a pressure sensor 32 are provided on multiple branch lines that branch off from the current line K4.

The output side of the control device PLC is connected to the solenoids of the multiple electromagnetic control valves included in the control valve unit 31A described above. The output side of the control device PLC is also connected to the nearly full load pilot lamp PL1 and the full load pilot lamp PL2 provided in the rear operating section 11 and the front operating section 16, respectively, and controls the lighting of these lamps.

The control device PLC is programmed to output signals to the corresponding solenoids to operate the sliding cylinder 49, the swinging cylinder 51, etc. according to a preset procedure based on signals input from the distance sensor 56, the compression plate rotation angle sensor 58, the pressure sensor 32, the switches SW1 to SW7, etc., and to turn on the nearly full load pilot lamp PL1 or the full load pilot lamp PL2 under certain conditions described later.

<Control of press-type garbage loading operation>
The garbage collection vehicle 1A according to the second embodiment also has a function of notifying the operator of information regarding the full load state of the garbage storage box 3, like the garbage collection vehicle 1 according to the first embodiment. Specifically, in the process (rising process) in which the compression plate 50 pushes garbage into the garbage storage box 3A, when the hydraulic pressure value of the hydraulic oil supplied to the sliding cylinder 49 that raises the compression plate 50 together with the sliding plate 42 is equal to or higher than a predetermined hydraulic pressure threshold value PR0 and the displacement amount (movement amount) of the compression plate 50 (sliding plate 42) per unit time is equal to or lower than a first threshold value TL1, the control device PLC determines that the garbage storage box 3A is in a full load state and causes the notification device to execute a notification in a first notification mode. In this embodiment as well, the notification device is composed of the full load pilot lamp PL2 and the nearly full load pilot lamp PL1, and the first notification mode is the lighting of the full load pilot lamp PL2 and the extinguishing of the nearly full load pilot lamp PL1. The hydraulic pressure threshold value PRO can be set to, for example, the relief pressure of the relief valve RV or a pressure close to the relief pressure.

In addition, during the process in which the compression plate 50 rises to push the garbage into the garbage storage box 3A (during the rising process), if the hydraulic pressure value of the hydraulic oil supplied to the sliding cylinder 49 becomes equal to or greater than the hydraulic pressure threshold value PR0 and the displacement (movement) per unit time of the compression plate 50 does not become equal to or less than the first threshold value TL1 but becomes equal to or less than a predetermined second threshold value TL2, the control device PLC causes the alarm device to issue an alarm in a predetermined second alarm mode different from the first alarm mode. In this embodiment, the second alarm mode is turning off the full load pilot lamp PL2 and turning on the nearly full load pilot lamp PL1. In the above, the first threshold value TL1 is a value smaller than the second threshold value TL2.

The values of the hydraulic threshold value PRO, the first threshold value TL1, the second threshold value TL2, etc. are values that are set in advance in the control device PLC. Appropriate values for these setting values can be obtained, for example, by practical testing, simulation, etc.

Whether an alert is given by the first alert mode or the second alert mode, the hydraulic circuit has reached or is close to the relief pressure, meaning that the garbage storage box 3 is fully loaded or nearly fully loaded. During garbage loading work, the second alert mode can first notify the worker that the garbage storage box 3 is nearly fully loaded, and then the first alert mode can notify the worker that the garbage storage box 3 is fully loaded.

The processing operations executed by the garbage loading device 13A will be described below with reference to the flowchart in Figure 13. However, since steps S1 to S3 and steps S9 to S15 described in the first embodiment based on the flowchart in Figure 6 are the same processing operations in this embodiment, their description will be omitted and only the processing operations that replace steps S3 to S8 will be described below.

After step S3, in step S4A, the control device PLC starts the garbage loading operation using the sliding plate 42 and the compression plate 50.

In this garbage loading operation of step S4A, first, as shown in FIG. 9A, in the initial state of the cycle, the sliding cylinder 49 (not shown in FIG. 9A) and the swinging cylinder 51 are both extended, and the sliding plate 42 and the compression plate 50 are in the lift end position (uppermost position).

From this initial state, the swing cylinder 51 contracts as the reversing process, causing the compression plate 50 to reverse and reach the end of the reversing position (see FIG. 9B). Next, as the descending process, the sliding cylinder 49 contracts and the sliding plate 42 descends, and the compression plate 50 descends accordingly and reaches the end of the descending position (see FIG. 9C). Next, as the compression process, the swing cylinder 51 extends and swings the compression plate 50 forward, and the compression plate 50 reaches the end of the compression position (FIG. 9D). After that, as the ascending process, the sliding cylinder 49 extends and raises the compression plate 50. When the compression plate 50 reaches the end of the ascending position shown in FIG. 9A, the series of garbage loading operations is completed.

In step S5A, the control device PLC determines whether the garbage loading operation is the ascent process. If the garbage loading operation is the ascent process (S5A: YES), the process proceeds to step S6A. If the garbage loading operation is not the ascent process (S5A: NO), the process returns to step S4A and the garbage loading operation continues.

In step S6A, the control device PLC determines whether the hydraulic pressure of the hydraulic oil supplied to the head-side oil chamber of the sliding cylinder 49 is equal to or greater than the hydraulic pressure threshold value PR0 based on the signal input from the pressure sensor 32. If the hydraulic pressure is equal to or greater than the hydraulic pressure threshold value PR0 (step S6A: YES), the process proceeds to step S7A. If the hydraulic pressure is less than the hydraulic pressure threshold value PR0 (step S6A: NO), the process proceeds to step S10.

In step S7A, the control device PLC determines whether the displacement amount ΔL per unit time of the compression plate 50 (sliding plate 42) (the displacement amount (movement amount) from the compression plate 50 shown by the two-dot chain line to the compression plate 50 shown by the solid line in FIG. 9) is equal to or less than the second threshold value TL2. If the displacement amount ΔL is equal to or less than the second threshold value TL2 (step S7A: YES), proceed to step S8A, and if the displacement amount ΔL exceeds the second threshold value TL2 (step S7A: NO), proceed to step S10.

In step S8A, the control device PLC determines whether the displacement amount ΔL per unit time of the compression plate 50 (sliding plate 42) is equal to or less than the first threshold value TL1. If the displacement amount ΔL is equal to or less than the first threshold value TL1 (step S8A: YES), the process proceeds to step S13. If the displacement amount ΔL exceeds the first threshold value TL1 (step S7A: NO), the process proceeds to step S9.

-Modification of the second embodiment-
It is also possible to adopt modified examples in which steps S7A and S8A in the above two embodiments are modified as follows.

In step S7A of the second embodiment, the control device PLC determines whether the displacement amount ΔL per unit time of the compression plate 50 (sliding plate 42) is equal to or less than the second threshold value TL2. Alternatively, the control device PLC proceeds to step S8A if the time ΔT required for the compression plate 50 (sliding plate 42) to displace by a predetermined displacement amount is equal to or greater than the second threshold value TT2 (step S7A: YES), and proceeds to step S10 if the time ΔT is less than the second threshold value TT2 (step S7A: NO).

In addition, in step S8A in the second embodiment, the control device PLC determines whether the displacement amount ΔL per unit time of the compression plate 50 (sliding plate 42) is equal to or less than the first threshold value TL1. Alternatively, the control device PLC may proceed to step S13 if the time ΔT required for the sliding plate 42 to move a predetermined amount is equal to or greater than the first threshold value TT1 (step S8A: YES), and proceed to step S9 if the time ΔT is less than the first threshold value TT1 (step S8A: NO).

-Modification of the notification device-
In the first and second embodiments described above, the nearly full pilot lamp PL1 is turned on and the full pilot lamp PL2 is turned off to notify that the trash collection box 3 is nearly full, and the nearly full pilot lamp PL1 is turned off and the full pilot lamp PL2 is turned on to notify that the trash collection box 3 is fully loaded. However, the display mode of the pilot lamps is not limited to the above as long as it is possible to distinguish between the nearly full state and the full state.

For example, one pilot lamp PL1 may be turned on and the other pilot lamp PL2 may be turned off to indicate that the vehicle is nearly fully loaded, and both pilot lamps PL1 and PL2 may be turned on to indicate that the vehicle is fully loaded.

Also, a single pilot lamp may be used as the notification device, and the pilot lamp may be flashed to indicate that the container is nearly full, and the pilot lamp may be lit to indicate that the container is fully loaded.

Also, a single pilot lamp may be used as the notification device, and the pilot lamp may be lit in a first color (e.g., yellow) to indicate that the container is nearly full, and may be lit in a second color (e.g., red) to indicate that the container is fully loaded.

In addition, in the first and second embodiments described above, a pilot lamp is used as the notification device, but the notification device is not limited to a pilot lamp and may be another type of lamp or display device such as a monitor, as long as it can notify the worker of the nearly full load state and the full load state through two different notification modes. In addition, the notification device is not limited to one that visually notifies the nearly full load state and the full load state, but may be one that notifies them audio or tactilely.

In the first and second embodiments described above, if the control device PLC determines that the garbage collection box 3 (3A) is fully loaded or nearly fully loaded, it issues an alert using the pilot lamps PL1 and PL2 mounted on the vehicle. However, the present invention is not limited to this. Instead of mounting an alert device on the vehicle, the control device of the garbage collection vehicle may be wirelessly connected to a mobile terminal (smartphone, tablet) via short-range wireless communication, and the fully loaded or nearly fully loaded state may be notified on the display of the mobile terminal. In addition, a server device in a management center located remotely from the garbage collection vehicle and the control device of the garbage collection vehicle may be connected using a mobile communication network and an Internet network, and information regarding the determination of the fully loaded or nearly fully loaded state may be sent from the garbage collection vehicle to the server device.

In addition, in the first and second embodiments described above, the control device PLC only issues an alert if it determines that the garbage storage box 3 (3A) is fully loaded or nearly fully loaded, but the present invention is not limited to this, and the operating sequence of the garbage loading device may be changed based on the determination of the fully loaded or nearly fully loaded state.

As is clear from the above explanation, according to the garbage collection vehicle 1, 1A of the embodiment of the present invention, during the process in which the garbage pushing member (pushing plate 15 or compression plate 50) pushes garbage into the garbage storage box 3, the full load state of the garbage storage box 3 is determined based on the amount of displacement per unit time of the garbage pushing member (pushing plate 15 or compression plate 50) or the time required for the garbage pushing member (pushing plate 15 or compression plate 50) to make a predetermined displacement, so that the full load state of the garbage storage box can be determined more accurately than with the garbage collection vehicle of the conventional example.

The present invention can be applied to garbage collection vehicles.

PLC control device PL1 Full load pilot lamp (alarm device)
PL2 Full load pilot lamp (alarm device)
1, 1A Refuse collection vehicle 3, 3A Refuse storage box 4, 4A Refuse input box 11 Rear operation unit 13, 13A Refuse loading device 15 Pushing plate (refuse pushing member)
16 Front operation unit 21 Pushing cylinder (dust pushing member actuator)
24 Rotation angle sensor for push plate (position detection sensor)
31 Control valve unit 32 Pressure sensor 49 Sliding cylinder (dust pushing member actuator)
50 Compression plate (dust pushing member)
56 Distance sensor (position detection sensor)
57 Sensing surface

Claims (9)

A dust collection box for collecting dust;
A trash input box connected to the rear of the trash storage box;
a garbage loading device that loads the garbage thrown into the garbage throwing box into the garbage storage box;
Equipped with
The trash loading device includes a trash pushing member that pushes trash into the trash storage box while being displaced, and a trash pushing member actuator that drives the trash pushing member.
A garbage collection vehicle,
a position detection sensor capable of detecting position information of the dust pushing member at any position within a movable range of the dust pushing member;
a pressure sensor for detecting the hydraulic pressure of hydraulic oil supplied to the trash pushing member actuator;
A control device that determines a full load state of the garbage storage box based on the position information detected by the position detection sensor and the hydraulic pressure of the hydraulic oil detected by the pressure sensor;
Equipped with
The control device of this garbage collection vehicle is characterized in that it determines that the garbage storage box is fully loaded when the oil pressure value of the working oil becomes equal to or higher than a predetermined oil pressure threshold during the process of the garbage pushing member pushing garbage into the garbage storage box, and the displacement amount per unit time of the garbage pushing member obtained based on the position information detected by the position detection sensor becomes equal to or lower than a predetermined first threshold. A refuse collection vehicle according to claim 1,
An alarm device is provided for notifying information regarding the full load state of the garbage storage box,
The control device of this garbage collection vehicle is characterized in that when the oil pressure value of the working oil becomes equal to or higher than a predetermined oil pressure threshold during the process of the garbage pushing member pushing garbage into the garbage storage box, and the displacement amount per unit time of the garbage pushing member obtained based on the position information detected by the position detection sensor becomes equal to or lower than a predetermined first threshold, the control device executes an alert in a first alert mode. A refuse collection vehicle according to claim 2,
The control device is characterized in that, when the oil pressure value of the working oil becomes equal to or higher than a predetermined oil pressure threshold during the process of the garbage pushing member pushing garbage into the garbage storage box, and the displacement amount per unit time of the garbage pushing member obtained based on the position information detected by the position detection sensor does not become equal to or lower than the first threshold but becomes equal to or lower than a predetermined second threshold, the control device causes the alarm device to issue an alarm in a predetermined second alarm mode different from the first alarm mode. A dust collection box for collecting dust;
A trash input box connected to the rear of the trash storage box;
a garbage loading device that loads the garbage thrown into the garbage throwing box into the garbage storage box;
Equipped with
The trash loading device includes a trash pushing member that pushes trash into the trash storage box while being displaced, and a trash pushing member actuator that drives the trash pushing member.
A garbage collection vehicle,
a position detection sensor capable of detecting position information of the dust pushing member at any position within a movable range of the dust pushing member;
a pressure sensor for detecting the hydraulic pressure of hydraulic oil supplied to the trash pushing member actuator;
A control device that determines a full load state of the garbage storage box based on the position information detected by the position detection sensor and the hydraulic pressure of the hydraulic oil detected by the pressure sensor;
Equipped with
The control device includes :
During the process of the trash pushing member pushing trash into the trash storage box, if the oil pressure value of the working oil becomes equal to or greater than a predetermined oil pressure threshold, and the time required for the displacement of the trash pushing member obtained based on the position information detected by the position detection sensor to reach a predetermined value becomes equal to or greater than a predetermined first threshold, it is determined that the trash storage box is fully loaded ,
This garbage collection vehicle is characterized in that, from the time when the garbage pushing member starts the process of pushing garbage into the garbage storage box to the time when the process ends, the determination as to whether the garbage storage box is fully loaded or not is repeated until it is determined that the garbage storage box is fully loaded . A refuse collection vehicle according to claim 4,
A notification device is provided for notifying information regarding the full load state of the garbage storage box,
The control device of this garbage collection vehicle is characterized in that when, during the process of the garbage pushing member pushing garbage into the garbage storage box, the oil pressure value of the working oil becomes equal to or greater than a predetermined oil pressure threshold, and the time required for the displacement of the garbage pushing member obtained based on the position information detected by the position detection sensor to reach a predetermined value becomes equal to or greater than a predetermined first threshold , the control device executes an alert in a first alert mode. A refuse collection vehicle according to claim 5,
The control device is characterized in that, when the oil pressure value of the working oil becomes equal to or greater than a predetermined oil pressure threshold during the process of the garbage pushing member pushing garbage into the garbage storage box, and the time required for the displacement of the garbage pushing member obtained based on the position information detected by the position detection sensor to reach a predetermined value does not become equal to or greater than the first threshold, but becomes equal to or greater than a predetermined second threshold, the control device causes the alarm device to issue an alarm in a predetermined second alarm mode different from the first alarm mode. A refuse collection vehicle according to claim 2, 3, 5 or 6 ,
A garbage collection vehicle, characterized in that the control device stops the supply of hydraulic oil to the garbage pushing member actuator when an alert is issued in the first alert mode. A refuse collection vehicle according to any one of claims 1 to 7,
The garbage loading device is
A rotating plate for stirring up the trash thrown into the trash throwing box;
A pusher plate as the dust pusher member for pushing the dust picked up by the rotating plate into the dust storage box;
a rotation angle sensor for the push plate as the position detection sensor for detecting an arbitrary rotation position of the push plate,
A refuse collection vehicle characterized by: A refuse collection vehicle according to any one of claims 1 to 7,
The garbage loading device is
A compression plate as the dust pushing member that compresses the dust put into the dust putting box and pushes it into the dust storage box;
A distance sensor as the position detection sensor for detecting an arbitrary position of the compression plate.
A refuse collection vehicle characterized by:

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