JPH0542963Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a step boarding system for a garbage collection vehicle that prevents a worker from riding on the input cradle provided in the garbage input box of the garbage collection vehicle. This invention relates to a prevention device.

2. Description of the Related Art In general, as a garbage collection vehicle, the type shown in FIG. 3 is put into practical use.

In FIG. 3, reference numeral 1 denotes a vehicle body, on which a garbage storage box 3 is placed on a chassis 2 so that it can be dumped rearward, and a garbage dumping box 4 is attached to the rear opening of the vehicle so that it can be opened by lift. A garbage inlet 5 is formed on the rear surface of the garbage inlet box 4, and an inlet holder 6 is provided at the lower part of the garbage inlet 5. Further, the garbage inlet 5 is provided with a rear door 7 that shields the garbage inlet 5, and one ends of rods 8 and 9 are rotatably supported on both upper and lower ends of the rear door 7. The other ends of the rods 8 and 9 are rotatably supported on both side plates of the garbage disposal box 4. A loading device consisting of a scraping plate and a pushing plate (not shown) is provided in the garbage input box 4, and this loading device collects the garbage thrown into the lower part of the garbage input box 4 from the garbage input port 5. Raise it up in front of the rear opening of the garbage storage box 3 using a scraper board,
It is made to be pushed into the garbage storage box 3 by a pushing plate. In addition, 10 in the figure is the driver's cab, 11,
Reference numeral 11 indicates a handle of the rear door 7.

Therefore, in the garbage collection work of this type of garbage collection vehicle, the garbage collection vehicle is driven at low speed or stopped, and a worker escorts garbage in plastic containers or plastic bags put out on the road to the garbage input port of the garbage input box 4. I'm bringing it to 5.

Problems to be Solved by the Invention Conventionally, in this type of garbage collection vehicle, an accompanying worker rides on a step for reasons such as making the garbage collection work more convenient. That is, when driving, as shown in FIG. 3, with the rear door 7 raised to open the garbage inlet 5, an accompanying worker holds the handles 11, 11 of the rear door 7 and opens the garbage inlet. Get on the cradle 6.

However, as a general rule, it is prohibited for accompanying workers to ride on the steps while the vehicle is in motion due to the danger involved, but this has not been observed in order to make the work more convenient.

This idea was made in view of the above issues,
The object thereof is to provide a step prevention device for a garbage collection vehicle which prevents an accompanying worker from riding on the steps while the vehicle is traveling.

Means for Solving the Problem In order to achieve the above-mentioned purpose, this invention is designed to switch the contact point from open to closed when the vehicle tries to run, such as by unlocking the parking brake, and to maintain the closed state while the vehicle is running. a vehicle running detection switch that is connected in series with the vehicle running detection switch and whose contacts switch from open to closed when the rear door is opened; A handle grip detection switch whose contacts switch from open to closed when a person grips the handle of the rear door is connected in parallel with the rear door opening/closing detection switch and the handle grip detection switch,
An input slot cradle occupancy detection switch whose contacts switch from closed to open when a person gets on the input cradle, the vehicle running detection switch, the rear door opening/closing detection switch, a handle grip detection switch, and the input cradle. At least one of the occupancy detection switches is provided with an alarm generator that generates an alarm when the switch is in a closed state,
When you try to drive the vehicle while riding on a step, or when you ride on a step while driving,
It is designed to generate an alarm.

Effects According to this invention, even if an accompanying worker is on the step, for example, if the parking brake is unlocked and the vehicle attempts to move,
When an accompanying worker tries to get on the step while the vehicle is running, an alarm generator issues an alarm to prompt the driver to prevent the worker from getting on the step.

Embodiment Hereinafter, a step boarding prevention device for a garbage collection vehicle according to this invention will be explained based on an embodiment shown in FIGS. 1 and 2. Incidentally, the same members as those in FIG. 3 are given the same reference numerals, and explanations of the same items will be omitted.

In FIG. 1, 12 is a brake handle of a parking brake installed in the driver's cab 10;
Reference numeral 3 designates a vehicle running detection switch, which is a limit switch having normally closed contacts, and is placed near the brake handle 12 when the parking brake is locked.
2 presses the switch 13 to open the contact,
When the parking brake is in the unlocked state, the brake handle 12 is
It is installed so that the contact is closed at a distance from 3.

Reference numeral 14 denotes a rear door opening/closing detection switch, which is a limit switch having a normally open contact, and is placed on one side of the garbage inlet box 4 when the rear door 7 is raised to open to the garbage inlet 5. The rod 8 presses the switch 14 to close the contact,
When the rear door 7 is lowered to cover the garbage inlet 5, the rod 8 is mounted away from the switch 14 to open the contact.

Reference numeral 15 denotes a handle grip detection switch provided on the rear door 7. A photoelectric switch is used here, and a light emitting element such as a light emitting diode emits light onto both sides of the lower end of the rear door 7. A light projector 15a and a light receiving unit 1 that receives the light projected from the projector 15a using a light receiving element such as a phototransistor.
5b are arranged opposite to each other with the handles 11, 11 in between, and when the handles 11, 11 of the rear door 7 are grasped, the amount of light entering the receiver 15b decreases and the output level changes. The state in which the handles 11, 11 of the door 7 are gripped is detected and the contacts are closed.

Reference numeral 16 denotes an input slot cradle occupancy detection switch provided on the input slot cradle 6, in which a photoelectric switch is used, and a light emitter 16a and a light receiver 16b are arranged facing each other on both sides of the upper surface of the input slot cradle 6. As a result, the amount of light entering the light receiver 16b mounted on the input slot pedestal 6 decreases and the output level changes, thereby detecting that the receiver 16b is mounted on the input slot cradle 6 and closes the contact. .

And each of the above switches 13, 14, 15, 1
6, as shown in FIG. 2, a power supply 17, a control relay 18, an alarm lamp 19, and an alarm buzzer 20 are connected by wiring to constitute a step boarding alarm circuit. Note that 18a indicates a normally open contact of the control relay 18.

Next, the operation of the step boarding prevention device for a garbage collection vehicle according to the present invention having the above structure will be explained.

The above-mentioned step riding prevention device operates when the garbage collection vehicle attempts to run even with an accompanying worker riding on the steps. In other words, the attendant worker stepped on the step, that is, when the handle 11,1 of the rear door 7 was raised to open the garbage inlet 5.
1, the rod 8 presses the rear door opening/closing switch 13, which has a normally open contact, to close the contact, and the handles 11, 11 of the rear door 7 The hand of the attendant worker holding the handle grip detection switch 15
The contact is closed by reducing the amount of light entering b, and further reduces the amount of light entering the light receiver 16b of the input port cradle occupancy detection switch 16 when the foot of an attendant worker riding on the input port cradle 6 closes the contact. When the parking brake is unlocked in this state and the garbage truck is about to run, the brake handle 12 moves away from the parking brake switch 13, which has a normally closed contact, and the contact closes, causing the control relay 18 to close. is energized, its contact 18a closes, the alarm lamp 19 lights up, and the alarm buzzer 20 generates an alarm sound.

In addition, the above-mentioned step riding prevention device can be used not only when an accompanying worker gets on the step, but also when the rear door 7 is lifted and the garbage inlet 5 is opened, or when the worker grasps the handles 11, 11 of the rear door 7. Even if the parking brake is unlocked and the garbage collection vehicle is driven, the parking brake will operate even if the parking brake is only in a state where the garbage collection vehicle is running, or if an accompanying worker is only riding on the input slot cradle 6. It operates even if it is in each of the above states.

In the above embodiment, a warning lamp 19 and a warning buzzer 20 are used to warn the attendant to prevent the accompanying worker from riding on the step. It controls the electric circuit to stop the engine, or activates the solenoid valve of the vacuum chamber for the engine exhaust brake to brake the vacuum brake while driving, or controls the engine accelerator system. The alarm lamp 19 is equipped with a function that prevents the vehicle from running, such as suppressing engine rotation, and the alarm buzzer 20
It is also possible to issue an alarm using an alarm generator such as the following, and also make it impossible for the vehicle to run. In addition, in the above embodiment, an attempt to drive the vehicle is detected by detecting the unlocked state of the parking brake, but in addition to this, it is also possible to detect whether the foot brake is activated or released, or when the transmission is activated. It is also possible to detect whether or not the vehicle is in neutral to detect when the vehicle is about to move, and it is also possible to use both detection of the unlocked state of the parking brake and detection of activation or release of the foot brake. be. In addition, in the embodiment, photoelectric switches are used as the handle grip detection switch 15 and the input port cradle boarding detection switch 16.
This invention is not limited to this, and eddy current switches, capacitance switches, etc. may be used in addition to photoelectric switches. Further, in the embodiment, the alarm sound is generated by the alarm buzzer 20, but it is also possible to generate the alarm sound by the horn of the vehicle.

Effects of the invention According to this invention, if an attempt is made to drive the vehicle while a person is riding on the steps, or if the person attempts to ride on the steps while the vehicle is moving, an alarm is generated to prevent the rider from riding on the steps, and it is also impossible to drive the vehicle. Therefore, it is possible to prevent attendant workers from getting on the step and driving, and the garbage collection work can be carried out completely.

[Brief explanation of drawings]

Fig. 1 is a perspective view from the rear of a garbage collection vehicle to which the step boarding prevention device according to the invention is applied, Fig. 2 is a step boarding alarm circuit diagram, and Fig. 3 is a general view with an accompanying worker riding on the steps. It is a perspective view from the rear of a garbage collection vehicle. 1... Vehicle body, 2... Vehicle chassis, 3... Garbage storage box,
4... Garbage inlet box, 5... Garbage inlet, 6... Inlet holder, 7... Rear door, 8, 9... Rod, 1
0... Driver's cab, 11, 11... Handle, 12... Brake handle, 13... Parking brake switch, 14... Rear door opening/closing detection switch, 15
...Handle gripping detection switch, 16...Inlet cradle boarding detection switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A vehicle running detection switch whose contacts switch from open to closed when the vehicle attempts to run, such as by releasing the parking brake lock, and which maintains the closed state while the vehicle is running; Connected in series with the running detection switch,
The rear door open/close detection switch switches from open to closed when the rear door is opened, and the rear door open/close detection switch is connected in parallel with the above rear door open/close detection switch, and when a person grasps the handle of the rear door, the contact switches from open to closed. a handle gripping detection switch; and a loading slot cradle occupancy detection switch which is connected in parallel with the rear door opening/closing detection switch and the handle gripping detection switch, and whose contacts switch from closed to open when a person gets on the loading slot cradle. and an alarm generator that generates an alarm when at least one of the vehicle running detection switch, the rear door opening/closing detection switch, the handle gripping detection switch, and the input slot cradle occupancy detection switch is in a closed state, A step boarding prevention device for a garbage collection vehicle, characterized in that an alarm is generated when the vehicle is attempted to run while the vehicle is being ridden, or when the vehicle is stepped on the vehicle while the vehicle is running.