Refuse collection truck

Abstract

To provide a garbage collection vehicle capable of solving the problems of a detection switch of a conventional garbage loading device and improving safety.SOLUTION: A garbage collection vehicle includes: a packing box; rotation angle sensors 14 and 15 for detecting an arbitrary tilted angle of the packing box; selection units 16 and 17 for accepting selection of validity / invalidity of a specific tilting operation function of the packing box; and a control device PLC for controlling the tilting operation of the packing box based on the tilted angle of the packing box detected by the rotation angle sensors 14 and 15 and a selection state of the specific tilting operation function accepted by the selection units 16 and 17. The control device PLC has a setting tilted angle storage unit 27 for storing an initial position 0 degree of the packing box, a maximum tilted angle C degree, and setting tilted angles A and B degrees between the initial position 0 degree and the maximum tilted angle C degree. The control device PLC, when tilting the packing box between the initial position 0 degree and the maximum tilted angle C degree if the selected state of the specific tilting operation function is valid, changes a tilted speed of the packing box at the setting tilted angle A and B degrees.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a refuse collection vehicle. [Background technology]

[0002] Conventionally, as disclosed in Patent Document 1, a garbage collection vehicle is known that includes a garbage storage box for storing garbage and a garbage drop box connected to the rear of the garbage storage box. The garbage drop box is equipped with a garbage loading device, and garbage dropped into the garbage drop box by the garbage loading device is pushed into the garbage storage box. The garbage drop box is pivotally supported at the rear upper part of the garbage storage box so as to be able to tilt freely, and is tilted up and down by the extension and contraction action of a tilting cylinder to open and close the rear opening of the garbage storage box.

[0003] The waste collection vehicle of Patent Document 1 is provided with a detection switch for detecting a predetermined tilted position of the waste bin. When the detection switch detects a detectable member with an arc-shaped cross section attached to the waste storage bin, it inputs an ON signal to the control device, and when it does not detect the detectable member, it inputs an OFF signal to the control device. Based on the signal from the detection switch, the control device detects whether the waste bin is in the fully closed position, in a position tilted 45 degrees from the fully closed position, or in a position tilted 90 degrees from the fully closed position. The detection switch may be a limit switch, a photoelectric switch, or a proximity switch. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-097504 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, when tilting a garbage dump box or a garbage storage box (hereinafter collectively referred to as "packing box") mounted on the chassis of a garbage collection truck, safety can be improved if the tilting can be limited to a predetermined tilting angle for safety reasons.

[0006] However, when limiting the tilting of the packing box at a predetermined tilting angle in this manner, it becomes necessary to detect the tilting angle, which requires the addition of a new detection switch or a new member to be detected.

[0007] Furthermore, when a detection switch is used to detect a specific tilt angle of a cargo box, if it becomes necessary to change the detection position for some reason, the installation position of the detection switch must be changed.

[0008] Furthermore, if there are multiple tilt angles at which the box must be detected and these are close to each other, it may not be possible to secure space for mounting the detection switch, making it difficult to detect the box at all positions at which it must be detected.

[0009] An object of the present invention is to provide a refuse collection vehicle that can improve safety while solving the problems associated with the above-mentioned detection switches by employing an alternative means other than a detection switch. [Means for solving the problem]

[0010] In order to solve the above problems, a garbage collection vehicle according to a first aspect of the present invention is presumed to include a packing box that can be tilted from an initial position arranged during travel to a predetermined maximum tilt angle, a rotation angle sensor that detects an arbitrary tilt angle of the packing box, a selection unit that accepts a selection of whether a specific tilting operation function of the packing box is enabled or disabled, and a control device that controls the tilting operation of the packing box based on the tilt angle of the packing box detected by the rotation angle sensor and the selection state of the specific tilting operation function accepted by the selection unit. The control device has a set tilt angle storage unit that stores the initial position of the packing box, the maximum tilt angle, and a set tilt angle between the initial position and the maximum tilt angle. When the selection state of the specific tilting operation function is enabled, the control device changes the tilt speed of the packing box at the set tilt angle between the initial position and the maximum tilt angle when tilting the packing box between the initial position and the maximum tilt angle.

[0011] A refuse collection vehicle having such a configuration can improve safety while eliminating the problems associated with detection switches used in conventional refuse collection vehicles.

[0012] A second aspect of the present invention is a garbage collection vehicle according to the first aspect, wherein when the selection state of the specific tilting operation function is active, the control device, when tilting the loading box toward the maximum tilting angle, stops the tilting of the loading box when the loading box reaches the set tilting angle, and regulates the tilting of the loading box beyond the set tilting angle.

[0013] A garbage collection vehicle according to a third aspect of the present invention is a garbage collection vehicle according to the first aspect, wherein when the selection state of the specific tilting operation function is active, the control device, when tilting the loading box in one direction or the other, temporarily halts the tilting of the loading box when the loading box reaches the set tilting angle, and tilts the loading box again in the same direction after a predetermined time has elapsed or based on a switch operation input.

[0014] A garbage collection vehicle according to a fourth aspect of the present invention is a garbage collection vehicle according to the first aspect, wherein when the selection state of the specific tilting operation function is active, the control device, when tilting the cargo box in one direction or the other, slows the tilting speed after the cargo box reaches the set tilting angle compared to the tilting speed before the cargo box reaches the set tilting angle.

[0015] A garbage collection vehicle according to a fifth aspect of the present invention is a garbage collection vehicle according to the first aspect, wherein when the selection state of the specific tilting operation function is active, the control device, when tilting the cargo box in one direction or the other, temporarily halts the tilting of the cargo box when the cargo box reaches the set tilting angle, and then tilts the cargo box again in the same direction at a slower tilting speed than the tilting speed before the set tilting angle was reached.

[0016] A garbage collection vehicle according to a sixth aspect of the present invention is a garbage collection vehicle according to the first aspect, wherein the set tilting angle memory unit stores a plurality of set tilting angles between the initial position and the maximum tilting angle, and when the selection state of the specific tilting operation function is active, the control device, when tilting the packing box in one direction or the other direction, tilts the packing box in the same direction at a faster tilting speed after the packing box reaches one of the plurality of set tilting angles than the tilting speed before the packing box reaches the one set tilting angle, and then tilts the packing box in the same direction at a slower tilting speed after the packing box reaches the other set tilting angle than the tilting speed before the packing box reaches the other set tilting angle.

[0017] A refuse collection vehicle according to a seventh aspect of the present invention is a refuse collection vehicle according to any one of the first to sixth aspects, in which the loading box is a refuse drop box or a refuse storage box. Effect of the Invention

[0018] According to the present invention, it is possible to provide a refuse collection truck that can improve safety while solving the problems associated with detection switches used in conventional refuse collection trucks. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a left side view of a refuse collection vehicle according to an embodiment of the present invention, showing a traveling state. [Diagram 2] FIG. 2 is a left side view of the refuse collection vehicle according to the embodiment of the present invention, showing the refuse bin in a fully open state. [Diagram 3] FIG. 2 is a left side view of the refuse collection vehicle according to the embodiment of the present invention, showing the state in which the refuse insertion box is fully opened and the refuse storage box is fully dumped. [Figure 4] 4A to 4C are diagrams illustrating an example of a front operation unit according to an embodiment of the present invention. [Diagram 5] 1 is a hydraulic circuit diagram of a refuse collection vehicle according to an embodiment of the present invention. [Figure 6] 1 is a control circuit diagram of a refuse collection vehicle according to an embodiment of the present invention; [Figure 7] 10 is a diagram showing an example of registration of set tilt angles stored in a set tilt angle storage unit in the embodiment of the present invention; FIG. [Figure 8] 4 is a flowchart showing a flow of control executed by a control device for a sewage collection vehicle according to an embodiment of the present invention. [Figure 9] 4 is a flowchart showing a flow of control executed by a control device for a sewage collection vehicle according to an embodiment of the present invention. [Figure 10] 5A and 5B are schematic diagrams showing how a trash bin in an embodiment of the present invention tilts. [Figure 11] 5A to 5C are schematic diagrams showing how a trash collection box in an embodiment of the present invention tilts. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, 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 be simply referred to as "front", "rear", "left" and "right", respectively.

[0021] As shown in Figures 1 to 3, a refuse collection vehicle 1 according to an embodiment of the present invention has two packing boxes on a chassis 2. One packing box is a refuse collection box 3, and the other packing box is a refuse drop box 4. The refuse drop box 4 is connected to the rear of the refuse collection box 3.

[0022] The trash collection box 3 is configured to be tiltable (dumpable) about a tilting shaft 9 at the rear of the subframe 2a of the chassis 2 by extending and retracting a dump cylinder 7 (see FIG. 3) provided between the subframe 2a on the chassis 2 and the frame 3a of the trash collection box 3. The trash collection box 3 shown in FIG. 3 shows the maximum tilt state of the trash collection box 3 (full dump state).

[0023] The garbage dump box 4 is pivotally supported by the garbage storage box 3 via a pivot 6 extending in the left-right direction, and tilts by the extension and contraction of a pair of left and right tilting cylinders 5. The garbage dump box 4 shown in Fig. 2 is tilted to the maximum tilt angle, and the rear opening 3b of the garbage storage box 3 is fully opened (fully open state). Also, the garbage dump box 4 shown in Fig. 3 is tilted to the maximum tilt angle in the garbage storage box 3 tilted to the maximum tilt angle (full dump state).

[0024] A trash inlet for inserting trash is opened on the back of the trash inlet box 4, and the trash inlet is opened and closed by a tailgate that can be raised and lowered. A rear operating section 11 for operating the trash loading device and the like is provided on the left side of the trash inlet (see FIG. 1).

[0025] In addition, as shown in FIG. 4, a front operation unit 12 for performing operations such as discharging garbage is provided in the driver's cab 1a of the garbage collection vehicle 1. The front operation unit 12 illustrated in FIG. 4 includes a hopper restriction switch 16, a dump restriction switch 17, a scraping button 18, a loading / discharging changeover switch SW6, a hopper open / close switch SW7, and a dump switch SW8. The hopper restriction switch 16 functions as a selection unit that accepts a selection of whether to enable or disable a specific tilting operation function of the garbage dump box 4, and the dump restriction switch 17 functions as a selection unit that accepts a selection of whether to enable or disable a specific tilting operation function of the garbage storage box 3. In this embodiment, the specific tilting operation function of the garbage dump box 4 is a function that limits the tilting operation of the garbage dump box 4 to a part of its movable range, and the specific tilting operation function of the garbage storage box 3 is a function that limits the tilting operation of the garbage storage box 3 to a part of its movable range.

[0026] The pivot 6 is provided with a rotation angle sensor 14 for the trash bin (see FIG. 6) that detects any tilt angle of the trash bin 4 relative to the trash collection box 3. The rotation angle sensor 14 for the trash bin detects any rotation position of the pivot 6 that rotates together with the trash bin 4, thereby detecting any tilt angle of the trash bin 4 relative to the trash collection box 3. As the rotation angle sensor 14 for the trash bin, for example, a rotation angle sensor that can detect the rotation position of the end of the pivot 6 over 360° can be used. Furthermore, a rotary encoder or a potentiometer can be used as this rotation angle sensor. Furthermore, a non-contact rotation angle sensor can be used as the rotation angle sensor.

[0027] Further, the tilting shaft 9 is provided with a trash collection box rotation angle sensor 15 (see FIG. 6) that detects any tilting angle of the trash collection box 3 relative to the subframe 2a. The trash collection box rotation angle sensor 15 detects any tilting angle of the trash collection box 3 relative to the subframe 2a by detecting any rotational position of the tilting shaft 9 that rotates integrally with the trash collection box 3. The trash collection box rotation angle sensor 15 may be the same as the example of the trash input box rotation angle sensor 14.

[0028] <Control system for tilting the garbage collection box and garbage dump box> Next, a control system for tilting the packing boxes 100 such as the garbage collection box 3 and the garbage throw box 4 will be described with reference to Figures 5 and 6. This control system includes a hydraulic circuit that controls hydraulic pressure supplied to the tilting cylinder 5 that tilts the garbage throw box 4, the dump cylinder 7 that tilts the garbage collection box 3, and the like, and a control device PLC (Programmable Logic Controller) that outputs a control signal to a control valve unit 31 provided in this hydraulic circuit.

[0029] First, the hydraulic circuit will be described with reference to Fig. 5. This hydraulic circuit includes a hydraulic pump P, an oil reservoir T, and a control valve unit 31. Driving force is transmitted to the hydraulic pump P by a PTO (power take-off) that extracts power from the engine E for driving the refuse collection vehicle 1.

[0030] The control valve unit 31 includes a plurality of electromagnetic control valves. 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 tilting cylinders 5 at a predetermined flow rate (Q1) in accordance with a predetermined control signal from the control device PLC, and extends the tilting cylinders 5. At this time, the garbage throwing box 4 tilts upward at a predetermined speed (hereinafter also referred to as the "standard hopper opening speed"), and the rear opening 3b of the garbage storage box 3 is opened. The control valve unit 31 can also supply hydraulic oil from the hydraulic pump P to the head-side oil chambers of the pair of left and right tilting cylinders 5 at a flow rate lower than the above-mentioned predetermined flow rate (Q1) in accordance with a predetermined control signal for low-speed tilting from the control device PLC, and extend the tilting cylinders 5 at a relatively low speed. At this time, the garbage throwing box 4 tilts upward at a speed slower than the "standard hopper opening speed", and the rear opening of the garbage storage box 3 is opened.

[0031] Meanwhile, the control valve unit 31 uses the weight of the garbage dump box 4 to discharge hydraulic oil from the head-side oil chambers of the pair of left and right tilting cylinders 5 at a predetermined flow rate (Q2) in accordance with another predetermined control signal from the control device PLC, and contracts the tilting cylinders 5 at a predetermined speed (hereinafter also referred to as the "standard hopper closing speed"). Also, the control valve unit 31 uses the weight of the garbage dump box 4 to discharge hydraulic oil from the head-side oil chambers of the pair of left and right tilting cylinders 5 at a flow rate lower than the predetermined flow rate (Q2) in accordance with another predetermined control signal for low-speed tilting from the control device PLC, and contracts the tilting cylinders 5 at a speed slower than the "standard hopper closing speed."

[0032] In addition, the electromagnetic on-off valve V1 attached to the head side port of the tilting cylinder 5 normally prevents the tilting cylinder 5 from contracting while allowing it to extend. However, when 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 tilting cylinders 5 in accordance with another specified control signal from the control device PLC, it switches the spool position from the position shown in Figure 4 to allow the tilting cylinder 5 to contract.

[0033] In addition, the control valve unit 31 supplies hydraulic oil from the hydraulic pump P to the head side oil chamber of the dump cylinder 7 at a predetermined flow rate (Q3) in accordance with a predetermined control signal from the control device PLC, thereby extending the dump cylinder 7. As a result, the garbage collection box 3 performs a dump lifting operation. At this time, the garbage collection box 3 tilts upward at a predetermined speed (hereinafter also referred to as the "standard dump lifting speed"). In addition, the control valve unit 31 supplies hydraulic oil from the hydraulic pump P to the head side oil chamber of the dump cylinder 7 at a flow rate lower than the above-mentioned predetermined flow rate (Q3) in accordance with a predetermined low-speed tilting control signal from the control device PLC, thereby extending the dump cylinder 7. As a result, the garbage collection box 3 performs a dump lifting operation. At this time, the garbage collection box 3 tilts upward at a speed slower than the "standard dump lifting speed".

[0034] Meanwhile, the control valve unit 31 supplies hydraulic oil from the hydraulic pump P to the rod side oil chamber of the dump cylinder 7 at a predetermined flow rate (Q4) in accordance with another predetermined control signal from the control device PLC, thereby contracting the dump cylinder 7. As a result, the garbage collection box 3 performs a dump lowering operation. At this time, the garbage collection box 3 tilts downward at a predetermined speed (hereinafter also referred to as the "standard dump lowering speed"). Also, the control valve unit 31 supplies hydraulic oil from the hydraulic pump P to the rod side oil chamber of the dump cylinder 7 at a flow rate lower than the above-mentioned predetermined flow rate (Q4) in accordance with another low-speed tilt control signal from the control device PLC, thereby contracting the dump cylinder 7. As a result, the garbage collection box 3 performs a dump lowering operation. At this time, the garbage collection box 3 tilts downward at a speed slower than the "standard dump lowering speed".

[0035] 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 sewage collection vehicle 1 are interposed in an electric current line K2 that extends from the positive terminal of the battery BT to the right side of Fig. 6 and reaches a ground line K1.

[0036] The upstream end of the current supply line K3 is connected between the ignition switch SWK and the battery BT in the current supply line K2, and a contact (relay switch) r1 of a relay coil R1 is provided in the current supply line K2. A main power supply lamp PL is provided downstream of the contact r1 in the current supply line K3. When the relay coil R1 is excited and the contact r1 is closed, the current supply line K3 is energized, and the main power supply lamp PL is turned on.

[0037] In addition, the upstream end of the current carrying line K4 is connected between the contact r1 and the main power supply lamp PL in the current carrying line K3. This allows power to be supplied to a signal power supply unit (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.

[0038] In addition, the control device PLC is energized by an energizing line K5 branched from the energizing line K4 while the garbage loading device is in operation. The energizing line K5 is provided with an emergency stop button (not shown) provided on the rear operation unit 11 on the left side of the garbage dump box 4, and switches SW1 to SW3 that are opened and closed in response to the operation of an emergency stop button (not shown) and an emergency stop plate (not shown) provided on the rear right side of the garbage dump box 4. When the energization (i.e., input of the loading continuation signal) is cut off by these switches SW1 to SW3, the control device PLC transmits a control signal to the control valve unit 31 to make an emergency stop of the garbage loading device, and the control valve unit 31 stops the supply of hydraulic oil from the hydraulic pump P to the garbage loading device.

[0039] In addition, the control device PLC is energized by an energizing line K6 branched from the energizing line K4 during the garbage discharge operation. A hopper opening / closing switch SW7 for tilting the garbage input box 4 to open and close the rear opening of the garbage storage box 3, and a dump switch SW8 for dumping the garbage storage box 3 are respectively provided on the energizing line K6.

[0040] In addition, a plurality of branch lines are connected to the current carrying line K4, and the above-mentioned garbage throw box rotation angle sensor 14 and garbage collection box rotation angle sensor 15 are interposed in each of these branch lines. Signals from the garbage throw box rotation angle sensor 14 and the garbage collection box rotation angle sensor 15 are input to the control device PLC, and an arbitrary tilt angle of the garbage throw box 4 and an arbitrary tilt angle of the garbage collection box 3 are detected based on these signals.

[0041] In addition to the rotation angle sensor 14 for the garbage input box and the rotation angle sensor 15 for the garbage storage box, the input side of the control device PLC is electrically connected to a hopper restriction switch 16, a dump restriction switch 17, a loading switch SW5 for causing the garbage loading device to perform garbage loading operation, a loading / discharging changeover switch SW6 for switching between the garbage loading operation and the garbage discharging operation, a switch (not shown) for selecting single or continuous operation of the garbage loading operation, and a switch (not shown) for independently operating the rotating plate and the pushing plate that constitute the garbage loading device. The loading / discharging changeover switch SW6 is provided at a branching position where the energizing line K5 and the energizing line K6 branch off from the energizing line K4, and the energizing line K5 is connected to the loading side of the loading / discharging changeover switch SW6, and the energizing line K6 is connected to the discharge side of the loading / discharging changeover switch SW6.

[0042] As described above, 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 above-mentioned control valve unit 31. The control device PLC is programmed to output to the corresponding solenoids to operate the tilting cylinder 5, dump cylinder 7, etc., according to a preset procedure based on signals input from the garbage throwing box rotation angle sensor 14, the garbage collecting box rotation angle sensor 15, switches SW1 to SW8, etc.

[0043] For example, when discharging garbage, 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 various control signals are output to the control valve unit 31 based on the appropriate operation of the hopper open / close switch SW7, the dump switch SW8, etc.

[0044] In response to this control signal, the control valve unit 31 supplies hydraulic pressure to the tilt cylinder 5, the dump cylinder 7, etc. This causes the tilt cylinder 5, the dump cylinder 7, etc. to operate, and the rubbish discharge operation is performed.

[0045] <Control of dust discharge operation> The garbage collection vehicle 1 according to this embodiment can regulate the tilting of the garbage bin 4 and the garbage storage box 3 by operating the hopper regulation switch 16 and the dump regulation switch 17. The control device PLC is equipped with a set tilt angle memory unit 27 that stores information on set tilt angles to be referenced in order to regulate the tilting of the garbage bin 4 and the garbage storage box 3. As shown in FIG. 7(a), the set tilt angle memory unit 27 stores the set tilt angles of the garbage bin 4, i.e., "0 degrees" as the initial position when the garbage bin 4 is placed during travel, "C degrees" as the maximum tilt angle, "A degrees" (e.g., any angle in the range of 0 degrees to 40 degrees) as the first tilt angle between the initial position and the maximum tilt angle, and "B degrees" (e.g., any angle in the range of -0 degrees to -15 degrees from the maximum tilt angle) as the second tilt angle between the first tilt angle and the maximum tilt angle. In addition, as shown in Figure 7 (b), the set tilt angles of the garbage collection box 3 are stored as "0 degrees" as the initial position where it is positioned during travel, "F degrees" as the maximum tilt angle, "D degrees" (for example, any angle in the range of 0 degrees to 45 degrees) as the first tilt angle between the initial position and the maximum tilt angle, and "E degrees" (for example, any angle in the range of -0 degrees to -15 degrees from the maximum tilt angle) as the second tilt angle between the first tilt angle and the maximum tilt angle.

[0046] Hereinafter, the processing operations executed in the garbage discharge operation of the garbage collection vehicle 1 will be described with reference to the flow charts of FIG. 8 and FIG.

[0047] First, in step S1, when an operator switches the PTO switch SWP from off to on, the power supply of the control device PLC is turned on.

[0048] Next, in step S2, the control device PLC judges whether the loading / discharging changeover switch SW6 is switched to the discharge side. If the loading / discharging changeover switch SW6 is switched to the discharge side (S2: YES), the process proceeds to step S3.

[0049] In step S3, the control device PLC judges whether the hopper opening / closing switch SW7 is switched to the open side. If the hopper opening / closing switch SW7 is switched to the open side (S3: YES), the process proceeds to step S4, and if the hopper opening / closing switch SW7 is not switched to the close side (S3: NO), the process proceeds to step S5.

[0050] In step S4, the control device PLC judges whether the hopper restriction switch 16 is switched to the restriction side. If the hopper restriction switch 16 is switched to the restriction side (if the selection state of the function for restricting the tilting operation of the garbage bin 4 is enabled) (S4: YES), the process proceeds to step S6, where the control device PLC executes the hopper opening operation, that is, the operation of tilting the garbage bin 4 upward, in the restriction mode.

[0051] On the other hand, in step S4, if the hopper restriction switch 16 is switched to the release side (S4: NO), the process proceeds to step S7, and the control device PLC executes the hopper opening operation, i.e., the operation of tilting the garbage dump box 4 upward, in the restriction release mode.

[0052] In step S5, the control device PLC judges whether the hopper open / close switch SW7 is switched to the closed side. If the hopper open / close switch SW7 is switched to the closed side (S5: YES), the process proceeds to step S8, and if the hopper open / close switch SW7 is not switched to the closed side (S5: NO), the process proceeds to step S11.

[0053] Next, in step S8, the control device PLC judges whether the hopper restriction switch 16 is switched to the restriction side. If the hopper restriction switch 16 is switched to the restriction side (if the selection state of the function for restricting the tilting operation of the garbage bin 4 is enabled) (S8: YES), the process proceeds to step S9, where the control device PLC executes the hopper closing operation, that is, the operation of tilting the garbage bin 4 downward, in the restriction mode.

[0054] On the other hand, in step S8, if the hopper restriction switch 16 is switched to the release side (S8: NO), the process proceeds to step S10, and the control device PLC executes the hopper closing operation, i.e., the operation of tilting the garbage dump box 4 downward, in the restriction release mode.

[0055] After step S6, step S7, step S9 or step S10, or after determining in step S5 that the hopper opening / closing switch SW7 is not switched to the closed side (S5: NO), the control device PLC determines whether the hopper opening / closing switch SW7 is turned off. If the hopper opening / closing switch SW7 is turned off (S11: YES), the process proceeds to step S12, and if the hopper opening / closing switch SW7 is not turned off (S11: NO), the process returns to step S3.

[0056] 9, the control device PLC determines whether the trash bin 4 is tilted by a predetermined angle or more. If the trash bin 4 is tilted by a predetermined angle or more (for example, 45° or more) (S12: YES), the process proceeds to step S13, and if the trash bin 4 is not tilted by the predetermined angle or more (S12: NO), the process exits this control routine.

[0057] In step S13, the control device PLC determines whether the dump switch SW8 is switched to the upper side. If the dump switch SW8 is switched to the upper side (S13: YES), the process proceeds to step S14, and if the dump switch SW8 is not switched to the upper side (S13: NO), the process proceeds to step S15.

[0058] In step S14, the control device PLC judges whether the dump restriction switch 17 is switched to the restriction side. If the dump restriction switch 17 is switched to the restriction side (if the selection state of the function for restricting the tilting operation of the garbage collection box 3 is enabled) (S14: YES), the process proceeds to step S16, and the control device PLC executes the dump lifting operation, i.e., the upward tilting of the garbage collection box 3, in the restriction mode.

[0059] On the other hand, in step S14, if the dump restriction switch 17 is switched to the release side (S14: NO), the process proceeds to step S17, where the control device PLC executes the dump lifting operation, i.e., the upward tilting of the garbage collection box 3, in the restriction release mode.

[0060] In step S15, the control device PLC determines whether the dump switch SW8 is switched to the lower side. If the dump switch SW8 is switched to the lower side (S15: YES), the process proceeds to step S18, and if the dump switch SW8 is not switched to the lower side (S15: NO), the process proceeds to step S21.

[0061] Next, in step S18, the control device PLC judges whether the dump restriction switch 17 is switched to the restriction side. If the dump restriction switch 17 is switched to the restriction side (if the selection state of the function for restricting the tilting operation of the garbage collection box 3 is enabled) (S18: YES), the process proceeds to step S19, and the control device PLC executes the dump lowering operation, that is, the downward tilting of the garbage collection box 3, in the restriction mode.

[0062] On the other hand, in step S18, if the dump restriction switch 17 is switched to the release side (S18: NO), the process proceeds to step S20, where the control device PLC executes the dump lowering operation, i.e., the downward tilting of the garbage collection box 3, in the restriction release mode.

[0063] After step S16, step S17, step S19, or step S20, or after determining in step S15 that the dump switch SW8 is not switched to the lower side (S15: NO), the control device PLC determines whether the dump switch SW8 is turned off. If the dump switch SW8 is turned off (S21: YES), the control routine is terminated, and if the dump switch SW8 is not turned off (S21: NO), the control returns to step S13.

[0064] Next, the tilting operation of the garbage dump box 4 in each of the above-mentioned steps S6, S7, S9 and S10, and the dumping operation of the garbage storage box 3 in each of the steps S16, S17, S19 and S20 will be explained with reference to Figures 10 and 11.

[0065] In the above-mentioned step S7, the control device PLC executes the hopper opening operation in the restriction release mode. In this case, the control device PLC extends the tilting cylinder 5 via the control valve unit 31 to tilt the garbage bin 4 from the fully closed position, which is the initial position, toward the fully open position, which is the maximum tilt angle, at the "hopper opening standard speed". Then, when the tilting angle of the garbage bin 4 relative to the garbage storage box 3 detected based on the signal from the garbage bin rotation angle sensor 14 reaches the maximum tilting angle "C degrees" of the garbage bin 4 (see FIG. 7(a)), the control device PLC stops the extension of the tilting cylinder 5 via the control valve unit 31 to stop the garbage bin 4 at the fully open position. In this restriction release mode, the control device PLC tilts the garbage bin 4 at the "hopper opening standard speed" over the entire range, regardless of the tilting angle of the garbage bin 4 relative to the garbage storage box 3.

[0066] In the above-mentioned step S6, the control device PLC executes the hopper opening operation in the regulated mode. In this case, the control device PLC extends the tilting cylinder 5 via the control valve unit 31 to tilt the garbage bin 4 from the initial position toward the maximum tilting angle. However, the control device PLC tilts the garbage bin 4 at a speed slower than the "hopper opening standard speed" until the tilting angle of the garbage bin 4 relative to the garbage storage box 3 detected based on the signal from the garbage bin rotation angle sensor 14 reaches the first tilting angle "A degree" from the initial position "0 degrees", which is the set tilting position of the garbage bin 4. Then, when the tilting angle of the garbage bin 4 reaches the first tilting angle "A degree", the control device PLC temporarily stops the supply of hydraulic oil to the tilting cylinder 5 to temporarily suspend the tilting of the garbage bin 4 at the first tilting angle "A degree". The suspending time is a time preset in the control device PLC. The same applies to the time of the temporary stop described later. After that, the control device PLC tilts the garbage bin 4 again, and tilts the garbage bin 4 at the "standard hopper opening speed" until the tilt angle of the garbage bin 4 reaches the second tilt angle "B degrees". Next, when the tilt angle of the garbage bin 4 reaches the second tilt angle "B degrees", the control device PLC temporarily stops the supply of hydraulic oil to the tilting cylinder 5, thereby temporarily stopping the tilt of the garbage bin 4 at the second tilt angle "B degrees". After that, the control device PLC tilts the garbage bin 4 again, and tilts the garbage bin 4 at a speed slower than the "standard hopper opening speed" until the tilt angle of the garbage bin 4 reaches the maximum tilt angle "C degrees". Then, when the tilting angle of the garbage dump box 4 reaches the maximum tilting angle "C degrees" of the garbage dump box 4, the control device PLC stops the extension of the tilting cylinder 5 via the control valve unit 31, thereby stopping the garbage dump box 4 in the fully open position.

[0067] In the above-mentioned step S10, the control device PLC executes the hopper closing operation in the restriction release mode. In this case, the control device PLC tilts the garbage bin 4 from the maximum tilt angle to the initial position at the "hopper closing standard speed" by contracting the tilting cylinder 5 via the control valve unit 31. Then, when the tilt angle of the garbage bin 4 relative to the garbage storage box 3 detected based on the signal from the garbage bin rotation angle sensor 14 reaches the initial position "0 degrees" of the garbage bin 4 (see FIG. 7(a)), the control device PLC stops the contraction of the tilting cylinder 5 via the control valve unit 31 to stop the garbage bin 4 at the initial position (fully closed position). In this restriction release mode, the control device PLC tilts the garbage bin 4 at the "hopper closing standard speed" over the entire range, regardless of the tilt angle of the garbage bin 4 relative to the garbage storage box 3.

[0068] In the above-mentioned step S9, the control device PLC executes the hopper closing operation in the regulated mode. In this case, the control device PLC tilts the garbage bin 4 from the maximum tilt angle toward the initial position by contracting the tilting cylinder 5 via the control valve unit 31. However, the control device PLC tilts the garbage bin 4 at the "hopper closing standard speed" until the tilt angle of the garbage bin 4 relative to the garbage storage box 3 detected based on the signal from the garbage bin rotation angle sensor 14 reaches the first tilt angle "A degree" from the maximum tilt angle "C degree". Then, when the tilt angle of the garbage bin 4 reaches the first tilt angle "A degree", the control device PLC temporarily stops the supply of hydraulic oil to the tilting cylinder 5 to temporarily suspend the tilt of the garbage bin 4 at the first tilt angle "A degree". Thereafter, the control device PLC tilts the garbage bin 4 again, tilting it at a speed slower than the "hopper closing standard speed" until the tilt angle of the garbage bin 4 reaches the initial position "0 degrees". Then, when the tilt angle of the garbage bin 4 reaches the initial position "0 degrees" of the garbage bin 4, the control device PLC stops the contraction of the tilting cylinder 5 via the control valve unit 31, thereby stopping the garbage bin 4 at the initial position (fully closed position).

[0069] In the above-mentioned step S17, the control device PLC executes the dump lifting operation in the restriction release mode. In this case, the control device PLC extends the dump cylinder 7 via the control valve unit 31 to tilt the garbage container 3 from the initial position disposed during travel to the full dump state, which is the maximum tilt angle, at the "dump lifting standard speed". Then, when the tilt angle of the garbage container 3 relative to the subframe 2a detected based on the signal from the garbage container rotation angle sensor 15 reaches the maximum tilt angle of the garbage container 3, "F degrees" (see FIG. 7(b)), the control device PLC stops the extension of the dump cylinder 7 via the control valve unit 31 to stop the garbage container 3 in the full dump state. In this restriction release mode, the control device PLC tilts the garbage container 3 at the "dump lifting standard speed" over the entire range, regardless of the tilt angle of the garbage container 3 relative to the subframe 2a.

[0070] In the above-mentioned step S16, the control device PLC executes the dump lifting operation in the regulated mode. In this case, the control device PLC extends the dump cylinder 7 via the control valve unit 31 to tilt the garbage container 3 from the initial position toward the maximum tilt angle. However, the control device PLC tilts the garbage container 3 at a speed slower than the "dump lifting standard speed" until the tilt angle of the garbage container 3 relative to the subframe 2a detected based on the signal from the garbage container rotation angle sensor 15 reaches the first tilt angle "D degrees" from the initial position "0 degrees" of the garbage container 3. Then, when the tilt angle of the garbage container 3 reaches the first tilt angle "D degrees", the control device PLC temporarily stops the supply of hydraulic oil to the dump cylinder 7 to temporarily suspend the tilt of the garbage container 3 at the first tilt angle "D degrees". After that, the control device PLC tilts the garbage collection box 3 again after a predetermined time (for example, 1 to 3 seconds) has elapsed since the temporary stop, or when a lift operation is input with the dump switch SW8, and tilts the garbage collection box 3 at the "dump lift opening standard speed" until the tilt angle of the garbage collection box 3 reaches the second tilt angle "E degrees". Next, when the tilt angle of the garbage collection box 3 reaches the second tilt angle "E degrees", the control device PLC temporarily stops the supply of hydraulic oil to the dump cylinder 7, thereby temporarily stopping the tilt of the garbage collection box 3 at the second tilt angle "E degrees". After that, the control device PLC tilts the garbage collection box 3 again after a predetermined time (for example, 1 to 3 seconds) has elapsed since the temporary stop, or when a lifting operation is input with the dump switch SW8, and tilts the garbage collection box 3 at a speed slower than the "standard dump lifting speed" until the tilt angle of the garbage collection box 3 reaches the maximum tilt angle "F degrees". Then, when the tilt angle of the garbage collection box 3 reaches the maximum tilt angle of the garbage collection box 3, "F degrees", the control device PLC stops the extension of the dump cylinder 7 via the control valve unit 31, thereby stopping the garbage collection box 3 in the full dump state.

[0071] In the above-mentioned step S20, the control device PLC executes the dump lowering operation in the restriction release mode. In this case, the control device PLC tilts the garbage container 3 from the maximum tilt angle toward the initial position at the "dump lowering standard speed" by contracting the dump cylinder 7 via the control valve unit 31. Then, when the tilt angle of the garbage container 3 relative to the subframe 2a detected based on the signal from the garbage container rotation angle sensor 15 reaches the initial position "0 degrees" of the garbage container 3 (see FIG. 7(b)), the control device PLC stops the contraction of the dump cylinder 7 via the control valve unit 31 to stop the garbage container 3 at the initial position. In this restriction release mode, the control device PLC tilts the garbage container 3 at the "dump lowering standard speed" over the entire range, regardless of the tilt angle of the garbage container 3 relative to the subframe 2a.

[0072] In the above-mentioned step S19, the control device PLC executes the dump lowering operation in the regulated mode. In this case, the control device PLC tilts the garbage container 3 from the maximum tilt angle toward the initial position by contracting the dump cylinder 7 via the control valve unit 31. However, the control device PLC tilts the garbage container 3 at the "dump lowering standard speed" until the tilt angle of the garbage container 3 relative to the subframe 2a detected based on the signal from the garbage container rotation angle sensor 15 reaches the first tilt angle "D degrees" from the maximum tilt angle "F degrees". Then, when the tilt angle of the garbage container 3 reaches the first tilt angle "D degrees", the control device PLC temporarily stops the supply of hydraulic oil to the dump cylinder 7 to temporarily suspend the tilt of the garbage container 3 at the first tilt angle "D degrees". After that, the control device PLC tilts the garbage collection box 3 again after a predetermined time (for example, 1 to 3 seconds) has elapsed since the temporary stop, or when a lowering operation is input with the dump switch SW8, and tilts the garbage collection box 3 at a speed slower than the "dump lowering speed" until the tilt angle of the garbage collection box 3 reaches the initial position "0 degrees". Then, when the tilt angle of the garbage collection box 3 reaches the initial position "0 degrees" of the garbage collection box 3, the control device PLC stops the contraction of the dump cylinder 7 via the control valve unit 31, thereby stopping the garbage collection box 3 at the initial position.

[0073] <Another embodiment 1> In the above-described embodiment, the control device PLC temporarily stops the garbage bin 4 at the first tilt angle "A degree" and the second tilt angle "B degree" when tilting the garbage bin 4 upward, but the garbage bin 4 may be tilted without being temporarily stopped at the first tilt angle "A degree" and the second tilt angle "B degree". That is, the garbage bin 4 is tilted at a speed slower than the "standard hopper opening speed" until the garbage bin 4 reaches the first tilt angle "A degree" from the initial position "0 degree", and the garbage bin 4 is tilted at the "standard hopper opening speed" until the garbage bin 4 reaches the second tilt angle "B degree" from the first tilt angle "A degree" without temporarily stopping the garbage bin 4 when the garbage bin 4 passes the first tilt angle "A degree". Thereafter, when the garbage dump box 4 passes through the second tilting angle "B degrees", the garbage dump box 4 may be tilted at a speed slower than the "standard hopper opening speed" until the garbage dump box 4 reaches the maximum tilting angle "C degrees" from the second tilting angle "B degrees" without temporarily stopping the garbage dump box 4.

[0074] In the above-described embodiment, the control device PLC temporarily stops the garbage bin 4 at the first tilt angle "A degree" when tilting the garbage bin 4 downward, but the garbage bin 4 may be tilted without being temporarily stopped at the first tilt angle "A degree". That is, the garbage bin 4 may be tilted at the "standard hopper opening speed" from the maximum tilt angle "C degree" until the garbage bin 4 reaches the first tilt angle "A degree", and when the garbage bin 4 passes the first tilt angle "A degree", the garbage bin 4 may be tilted at a speed slower than the "standard hopper opening speed" from the first tilt angle "A degree" until the garbage bin 4 reaches the initial position "0 degree" from the first tilt angle "A degree" without temporarily stopping the garbage bin 4.

[0075] In the above-described embodiment, the control device PLC temporarily stops the garbage container 3 at the first tilt angle "D degrees" and the second tilt angle "E degrees" when tilting the garbage container 3 upward, but the garbage container 3 may be tilted without being temporarily stopped at the first tilt angle "D degrees" and the second tilt angle "E degrees". That is, the garbage container 3 is tilted at a speed slower than the "standard dump lifting speed" until the garbage container 3 reaches the first tilt angle "D degrees" from the initial position "0 degrees", and when the garbage container 3 passes the first tilt angle "D degrees", the garbage container 3 is tilted at the "standard dump lifting speed" until the garbage container 3 reaches the second tilt angle "E degrees" from the first tilt angle "D degrees" without temporarily stopping the garbage container 3. Thereafter, when the garbage collection box 3 passes through the second tilting angle "E degrees", the garbage drop box 4 may be tilted at a speed slower than the "standard dump lifting speed" until the garbage collection box 3 reaches the maximum tilting angle "F degrees" from the second tilting angle "E degrees" without temporarily stopping the garbage collection box 3.

[0076] In the above embodiment, the control device PLC temporarily stops the garbage container 3 at the first tilt angle "D degrees" when tilting the garbage container 3 downward, but the garbage container 3 may be tilted without being temporarily stopped at the first tilt angle "D degrees". That is, the garbage container 3 may be tilted at the "standard dump lowering speed" from the maximum tilt angle "F degrees" until the garbage container 3 reaches the first tilt angle "D degrees", and when the garbage container 3 passes the first tilt angle "D degrees", the garbage container 3 may be tilted at a speed slower than the "standard dump lowering speed" from the first tilt angle "D degrees" until the garbage container 3 reaches the initial position "0 degrees" from the first tilt angle "D degrees" without temporarily stopping the garbage container 3.

[0077] <Another embodiment 2> In the above-described embodiment, the control device PLC temporarily stops the garbage bin 4 at the second tilt angle "B degrees" when tilting the garbage bin 4 upward, but the control device PLC may completely stop the garbage bin 4 at the second tilt angle "B degrees" and restrict tilting of the garbage bin 4 beyond the second tilt angle "B degrees". In other words, the control device PLC completely stops the garbage bin 4 at the second tilt angle "B degrees" and does not extend the dump cylinder 7 even if the dump switch SW8 continues to be switched to the upper side.

[0078] In the above-described embodiment, the control device PLC temporarily stops the garbage storage box 3 at the second tilt angle "E degrees" when tilting the garbage storage box 3 upward, but the control device PLC may completely stop the garbage storage box 3 at the second tilt angle "E degrees" and restrict the tilt of the garbage storage box 3 beyond the second tilt angle "E degrees". In other words, the control device PLC completely stops the garbage storage box 3 at the second tilt angle "E degrees" and does not extend the tilting cylinder 5 even if the hopper opening / closing switch SW7 continues to be switched to the upper side.

[0079] <Another embodiment 3> In the above-described embodiment, the control device PLC changes the tilting speed of the garbage dump box 4 around the first tilting angle "A degrees" and around the second tilting angle "B degrees" when tilting the garbage dump box 4 upward. However, the tilting speed of the garbage dump box 4 around the first tilting angle "A degrees" and around the second tilting angle "B degrees" may be set to the same speed (for example, the same standard hopper opening speed for both) and the garbage dump box 4 may be temporarily stopped when the first tilting angle "A degrees" and the second tilting angle "B degrees" are reached.

[0080] In the above-described embodiment, the control device PLC changes the tilting speed of the garbage dump box 4 before and after the first tilting angle "A degrees" when tilting the garbage dump box 4 downward. However, the tilting speed of the garbage dump box 4 before and after the first tilting angle "A degrees" may be set to the same speed (for example, the same standard hopper closing speed) and the garbage dump box 4 may be temporarily stopped when the first tilting angle "A degrees" is reached.

[0081] In the above-described embodiment, the control device PLC changes the tilting speed of the garbage collection box 3 before and after the first tilting angle "D degrees" and before and after the second tilting angle "E degrees" when tilting the garbage collection box 3 upward. However, the tilting speed of the garbage collection box 3 before and after the first tilting angle "E degrees" and before and after the second tilting angle "E degrees" may all be the same (for example, both may be the same standard dump lifting speed), and the garbage collection box 3 may be temporarily stopped when the first tilting angle "D degrees" and the second tilting angle "E degrees" are reached.

[0082] In the above-described embodiment, the control device PLC changes the tilting speed of the garbage storage box 3 before and after the first tilting angle "D degrees" when tilting the garbage storage box 3 downward, but the tilting speed of the garbage storage box 3 before and after the first tilting angle "D degrees" may both be the same speed (for example, both may be the same standard dump lowering speed).

[0083] <Another embodiment 4> In the above embodiment, a set tilt angle information correction means may be provided to correct the information on the set tilt angles of the garbage throw box 4 and the garbage storage box 3 stored in the set tilt angle memory unit 27. For example, a correction operation switch that can be operated by an operator is added to the rear operation unit 11, and a signal from the correction operation switch is connected to be input to the control device PLC. Then, according to the correction signal input from the correction operation switch, the control device PLC adds or subtracts a correction angle to the set tilt angles (above A degrees, B degrees, C degrees, D degrees, E degrees, and F degrees) of the garbage throw box 4 and the garbage storage box 3, and applies the tilt angles after the addition or subtraction as the "first tilt angle," "second tilt angle," and "maximum tilt angle," and performs the above garbage discharge operation. The correction operation switch may be a single common switch for the "first tilt angle," "second tilt angle," and "maximum tilt angle," or may be a separate switch for each of the "first tilt angle," "second tilt angle," and "maximum tilt angle." As the correction operation switch, for example, a switch that can continuously change the signal input to the control device PLC, such as a variable resistance switch, may be used.

[0084] <Another embodiment 5> In the above-described embodiment, when tilting the garbage dump box 4 upward, the control device PLC changes the tilting speed of the garbage dump box 4 around the first tilting angle "A degrees" and around the second tilting angle "B degrees". However, the tilting speed of the garbage dump box 4 around the first tilting angle "A degrees" may be changed from a speed slower than the standard hopper opening speed to the standard hopper opening speed, and the tilting speed of the garbage dump box 4 around the second tilting angle "B degrees" may be made the same.

[0085] In the above-described embodiment, when tilting the garbage storage box 3 upward, the control device PLC changes the tilting speed of the garbage storage box 3 around the first tilting angle "D degrees" and around the second tilting angle "E degrees". However, it is also possible to change the tilting speed of the garbage storage box 3 around the first tilting angle "E degrees" from a speed slower than the standard dump lifting speed to the standard dump lifting speed, and to keep the tilting speed of the garbage storage box 3 the same around the second tilting angle "E degrees".

[0086] <Effects of the refuse collection vehicles according to the above-described embodiment and other embodiments 1 to 3> The refuse collection vehicle 1 according to the embodiment described above provides the following advantageous effects.

[0087] When the garbage dump box 4 is opened or closed, the tilting speed of the garbage dump box 4 is relatively slow in the range from the fully closed state (initial position) to a predetermined tilting angle (first tilting angle), thereby increasing safety for workers immediately after the garbage dump box 4 begins its opening operation and immediately before the garbage dump box 4 is fully closed.

[0088] When the garbage dump box 4 opens or closes, the garbage dump box 4 pauses at a predetermined tilting angle (first tilting angle), thereby increasing safety for workers immediately after the garbage dump box 4 starts its opening operation and immediately before the garbage dump box 4 is fully closed.

[0089] When the trash bin 4 opens, the tilting speed of the trash bin 4 is relatively slow in the range from a predetermined tilting angle (second tilting angle) to the maximum tilting angle, so that the impact generated when the trash bin 4 is fully opened can be mitigated. Also, even if the trash bin 4 comes into contact with equipment or the like above just before it is fully opened, the impact at the time of contact can be mitigated.

[0090] When the trash bin 4 opens, it pauses at a predetermined tilt angle (second tilt angle), so that the impact that occurs when the trash bin 4 is fully opened can be mitigated. Also, even if the trash bin 4 comes into contact with equipment above it just before it is fully opened, the impact at the time of contact can be mitigated.

[0091] When the garbage dump box 4 opens, it stops at a predetermined tilting angle (second tilting angle) and any further tilting is restricted, thereby preventing the garbage dump box 4 from coming into contact with equipment above it just before it opens fully.

[0092] When the garbage collection box 3 tilts up and down, the tilting speed of the garbage collection box 3 is relatively slow in the range from the initial position to a predetermined tilting angle (first tilting angle), thereby increasing safety for workers immediately after the garbage collection box 3 starts to tilt upward and immediately before the garbage collection box 3 returns to the initial position.

[0093] When the garbage collection box 3 tilts up and down, the garbage collection box 3 pauses at a predetermined tilting angle (first tilting angle), thereby increasing safety for workers immediately after the garbage collection box 3 starts to tilt upward and immediately before the garbage collection box 3 returns to its initial position.

[0094] When the garbage collection box 3 tilts upward, the tilting speed of the garbage collection box 3 is relatively slow in the range from a predetermined tilting angle (second tilting angle) to the maximum tilting angle, so that the impact generated when the garbage collection box 3 is in a full dump state can be mitigated. Also, even if the garbage collection box 3 comes into contact with equipment or the like above it just before it is in a full dump state, the impact at the time of contact can be mitigated. Also, the dumping operation of the garbage collection box 3 is performed with the garbage input box 4 in a fully open state, and the center of gravity of the garbage collection vehicle moves backward, so that depending on the garbage discharge situation, the front wheels of the garbage collection vehicle are likely to lift and tilt backward, but such an event is mitigated because the tilting speed is relatively slow in the range from a predetermined tilting angle (second tilting angle) to the maximum tilting angle.

[0095] When the garbage collection box 3 tilts upward, the garbage collection box 3 temporarily stops at a predetermined tilt angle (second tilt angle), so that the impact generated when the garbage collection box 3 becomes a full dump state can be mitigated. Also, even if the garbage collection box 3 comes into contact with equipment or the like above it just before it becomes a full dump state, the impact at the time of contact can be mitigated. Also, the dump lift operation of the garbage collection box 3 is performed in a fully open state of the garbage input box 4, and depending on the garbage discharge situation, the center of gravity of the garbage collection vehicle is significantly biased backward, so that the garbage collection vehicle is likely to tilt backward, but according to the above embodiment, the garbage collection box temporarily stops at a predetermined tilt angle (second tilt angle), so that the garbage collection vehicle 1 is unlikely to tilt backward even in the above situation.

[0096] When the garbage collection box 3 tilts upward, it stops at a predetermined tilting angle (second tilting angle) and any further tilting is restricted, thereby preventing the garbage collection box 3 from coming into contact with equipment above it just before it reaches a full dump state.

[0097] The above Setting tilt angle By providing the information correction means, the operator can fine-tune the position where the garbage collection box 3 and the garbage throw box 4 stop while tilting, the position where rotation is restricted, and the position where the tilting speed is changed.

[0098] Since a rotation angle sensor capable of detecting any tilt angle is used to detect the tilt position of the garbage collection box 3 and the garbage throw box 4, if it is desired to change the set tilt position of the garbage collection box 3 and the garbage throw box 4, it is sufficient to change the registration of the set tilt position shown in FIG. 7 stored in the set tilt angle memory unit 27 of the control device PLC. Therefore, it is not necessary to change the mounting position of the rotation angle sensor or to add an additional rotation angle sensor. In addition, it is easy to increase or decrease the set tilt position, and multiple tilt positions close to each other can be registered as set tilt positions without any problems. [Industrial Applicability]

[0099] The present invention can be applied to a refuse collection vehicle. [Explanation of symbols]

[0100] PLC Control Device 100 packing boxes 1. Refuse collection truck 3. Dustbin 4 Garbage disposal box 5 Tilting Cylinder 7 Dump Cylinder 12 Front operation section 14 Rotation angle sensor for garbage dump box 15 Rotation angle sensor for garbage collection box 16 Hopper regulation switch (selector) 17 Dump control switch (selector) 27 Setting tilt angle memory section 31 Control valve unit

Claims

1. A cargo box that can be tilted from an initial position placed during traveling to a predetermined maximum tilt angle; A rotation angle sensor for detecting a tilt angle of the packing box; A selection unit that accepts a selection of whether a specific tilting function of the packing box is enabled or disabled; A control device that controls the tilting operation of the packing box based on the tilting angle of the packing box detected by the rotation angle sensor and the selection state of the specific tilting operation function received by the selection unit; A garbage collection vehicle comprising: The control device includes: a set tilt angle storage unit that stores the initial position of the packing box, the maximum tilt angle, and a set tilt angle between the initial position and the maximum tilt angle; When the selection state of the specific tilting operation function is active, when tilting the packing box between the initial position and the maximum tilting angle, changing the tilting speed of the packing box at the set tilting angle between the initial position and the maximum tilting angle; The rotation angle sensor is configured to detect any tilt angle within a movable range of the packing box. A refuse collection vehicle characterized by:

2. A refuse collection vehicle as claimed in claim 1, A correction means for correcting the set tilt angle is provided, The control device includes: when the selection state of the specific tilting operation function is active, when tilting the packing box between the initial position and the maximum tilting angle, changing the tilting speed of the packing box at the set tilting angle corrected by the correction means; A refuse collection vehicle characterized by:

3. A refuse collection vehicle according to claim 1 or 2, The control device, when the selection state of the specific tilting operation function is active, when tilting the cargo box in one direction or the other direction, temporarily stops the tilting of the cargo box when the cargo box reaches the set tilting angle, and tilts the cargo box in the same direction again after a predetermined time has elapsed or based on a switch operation input.

4. A refuse collection vehicle according to claim 1 or 2, The control device, when the selection state of the specific tilting operation function is active, is characterized in that when tilting the cargo box in one direction or the other, the tilting speed after the cargo box reaches the set tilting angle is slower than the tilting speed before the cargo box reaches the set tilting angle.

5. A refuse collection vehicle according to claim 1 or 2, The control device, when the selection state of the specific tilting operation function is active, when tilting the cargo box in one direction or the other direction, temporarily stops the tilting of the cargo box when the cargo box reaches the set tilting angle, and then tilts the cargo box again in the same direction at a slower tilting speed than the tilting speed before the set tilting angle was reached.

6. A refuse collection vehicle according to claim 1 or 2, the set tilt angle storage unit stores a plurality of set tilt angles between the initial position and the maximum tilt angle, When the selection state of the specific tilting operation function is active, the control device, when tilting the loading box in one direction or the other direction, tilts the loading box in the same direction at a faster tilting speed after the loading box reaches one of the multiple set tilting angles than the tilting speed before the loading box reaches the one set tilting angle, and then tilts the loading box in the same direction at a slower tilting speed after the loading box reaches the other set tilting angle than the tilting speed before the loading box reaches the other set tilting angle.

7. A refuse collection vehicle according to claim 1 or 2, A refuse collection vehicle, characterized in that the packing box is a refuse dump box or a refuse storage box.

Images