JP2533242B2 - Garbage suction truck - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust suction truck for sucking and transporting dust stored in a dust storage container, for example.

[0002]

2. Description of the Related Art Conventionally, in this type of dust suction truck, when starting suction work, a suction pipe rotatably provided on the upper surface of the dust storage tank is swung to the left or right side of the vehicle. The tip of the suction pipe is connected to a docking station that is in communication with the dust storage container via a connection pipe, and the dust storage container and the dust storage tank are in communication, and the dust in the dust storage container is sucked and transported to the dust storage tank. ing.
Then, when the suction work is completed and the suction pipe swiveled on the left or right side of the vehicle is stored, the suction pipe is swung at the storage position by the sensor that detects the swivel position of the suction pipe. .

[0003]

However, in the above-mentioned conventional apparatus, if an abnormality occurs in the sensor when the suction tube is swung and stored, the swivel is not stopped even when the suction tube reaches the storage position and the swirl tube is not stopped. There is a risk that the vehicle may continue to turn to the side of the vehicle on the opposite side. For example, in the case of work on a road, there is a risk of contact with a passing vehicle, which is extremely dangerous.

[0004]

The garbage suction truck of the present invention comprises:
A dust storage tank mounted on the vehicle frame, a suction pipe whose base end is vertically supported on the upper surface of the dust storage tank and which is rotatable, and this suction pipe is arranged along the rear wall of the dust storage tank. Detects which of the following storage positions are located: the storage area to be stored, the suction work area where the vehicle is swung to the side of the vehicle to perform dust suction work, and the specific rotation area set between the storage area and the suction work area. In a garbage suction vehicle equipped with a position detection device for automatically storing the suction pipe from the suction work area to the storage area based on a signal from the position detection device, the suction pipe is included in the control device. A first timer that is activated by an output signal from the position detection device when the suction work region reaches a specific swivel region, and an output signal from the position detection device when the suction pipe reaches the storage region from the specific swirl region Second tie operated by If, when operating after a predetermined time of the first timer has elapsed, or those having a stop means for operating after a predetermined time of the second timer stops the pivoting of the suction pipe when the elapsed.

[0005]

When the suction tube is retracted, the first timer is activated when the suction tube reaches the specific swivel area from the suction working area, and the second timer is activated when the suction tube reaches the storage area from the specific swirl area. The suction pipe is swung too far by the emergency stop means to stop the swirling of the suction pipe when a predetermined time has elapsed after the actuation of the first and second timers. Prevent it from protruding.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

First, in explaining the dust suction truck of the present invention, the construction of the whole dust suction / transport system for sucking and transporting dust by the dust suction truck will be described.

FIG. 1 is a schematic diagram showing the outline of a dust suction / transport system. In FIG. 1, reference numeral 1 denotes a garbage storage container installed on the basement floor of a high-rise building or the like. This garbage storage container 1
The lower end of the chute 2 is connected to the upper part of the
One end of a connecting pipe 3 is connected to the lower portion of the garbage storage container 1. The other end of the connecting pipe 3 is extended to a docking station 5 installed at a proper place on the ground, and is detachably attached to the suction pipe 30 provided in the dust storage tank 20 of the dust suction vehicle C by an appropriate coupling. Has been done.

In the figure, reference numeral V1 is an opening / closing valve provided at the lower end of the chute 2, V2 is an opening / closing valve provided at one end of the connecting pipe 3, and V3 introduces outside air into the waste container 1. An on-off valve provided in the introduction pipe 4.

As shown in FIG. 2, the dust suction car C is equipped with a suction unit 10 and a dust storage tank 20 for storing the dust sucked by the suction unit 10.

The suction unit 10 has a suction passage 11 whose one end is connected to the dust storage tank 20 and whose other end is open to the atmosphere, a water task rubber 12 provided in the suction passage 11, and a blower. A suction device 13 provided in the suction passage 11 on the atmosphere open side of the scrubber 12.
And a muffler 15 provided in the suction passage 11 on the atmosphere open side of the suction device 13 so that the dust storage tank 20 and the dust storage container 1 are negatively pressured by the suction device 13. .

The dust storage tank 20 has an opening / closing door 21 whose rear end wall opens rearward around the upper edge, and a discharge plate 22 slidably arranged in the dust storage tank 20 in the front-rear direction. It is configured to compress the dust stored in the dust storage tank 20 and dispose of the dust rearward of the vehicle.

The suction pipe 30 is used as the dust container 2
In the upper part of 0, a swirl tube 31 connected to the dust storage tank 20 and rotatably provided around a vertical axis, a flexible tube 32 connected to the swirl tube 31, and a flexible tube 32 are connected. In addition, the undulating pipe 33 provided so as to be capable of undulating, the expansion and contraction pipe 35 connected to the undulation pipe 33, the flexible pipe 36 connected to the expansion and contraction pipe 35, and the tip end portion connected to the flexible pipe 36 37 and 37. Reference numeral 38 is a support member for supporting the tip portion 37.

A position detecting device 40 (see FIG. 3) is provided at the base end of the swirl tube 31 to detect the swirl position of the swirl tube 31, that is, the swirl position of the suction tube 30.

The position detecting device 40, as shown in FIG.
A cam plate 41 is provided integrally with the base end portion of the swirl tube 31 and coaxially with the swivel center, and two sensors 42 and 43 arranged close to the outer periphery of the cam plate 41.

The cam plate 41 has three protrusions 41 on the outer periphery.
a, 41b, 41c are formed, and the convex portion 41a and the convex portion 41 are formed.
A concave portion 41d is formed between b and b, and a concave portion 41e is formed between the convex portions 41b and 41c.

Magnetic sensors are used for the sensors 42 and 43, for example. These sensors 42 and 43 are suction tubes 30.
Are arranged so as to face the convex portions 41a and 41c when they are located in the storage area (storage position) Z shown in FIG. 4, and in this state, an "H" level signal is output. There is. In addition, these sensors 42 and 43 are provided with the convex portion 41.
The "H" level signal is output even in the state of facing b, and the "L" level signal is output in the state of not facing these convex portions 41a, 41b, 41c.

When the suction pipe 30 is located in the left and right specific swivel areas DL and DR as shown in FIG.
Both 2 and 43 output a signal of "L" level (that is, the specific turning regions DL and DR are determined by the sizes of the recesses 41d and 41e), and the suction tube 30 sucks leftward. Sensor 4 when located in work area WL
2 outputs an “H” level signal, the sensor 43 outputs an “L” level signal, and when the suction tube 30 is located in the left suction work area WR, the sensor 42 outputs an “L” level signal, a sensor. 43 outputs an "H" level signal (see FIG. 5). Therefore, the turning position of the suction pipe 30 can be detected from the output states of the sensors 42 and 43.

Further, in the dust suction car C, each operation of the suction pipe 30 is controlled by operating an operation switch (not shown) provided at a proper position, and the position detecting device 4 is also provided.
A control device (not shown) is provided for automatically storing the suction tube 30 in the storage area Z from the left and right suction work areas WL, WR based on a signal from 0.

When the dust suction work is performed, the dust suction wheel C is brought closer to the docking station 5 and stopped, and then the swivel pipe 31 is swung to suck the suction pipe 3.
While turning the whole 0 to the side of the vehicle,
Of the suction tube 30
Connect the tip 37 of the to the docking station 5,
As a result, the waste container 20 and the waste container 1 are communicated with each other via the connection pipe 3 and the suction pipe 30. And
After closing the on-off valves V1 and V3 and opening the on-off valve V2, the suction device 13 is operated to make the dust storage container 1, the connection pipe 3, the suction pipe 30, and the dust storage tank 20 negative pressure, and then the on-off valve. By opening V3 and introducing the outside air into the dust storage container 1 through the introduction pipe 4, the dust in the dust storage container 1 is sucked and transported to the dust storage tank 20.

Next, the control for storing the suction tube 30, which is the main part of the present invention, after the dust suction work as described above is performed will be described with reference to the flowcharts of FIGS. 6 to 10. .

First, in step S1, it is determined whether or not the discharge plate 22 has been drawn in front of the dust container 20. If not, in step S2 the discharge plate 22 is drawn.
Is drawn in front of the garbage storage tank 20. Next, in step S3, it is determined whether the opening / closing door 21 is closed,
If it is not closed, the opening / closing door 21 is closed in step S4. After that, it is determined in step S5 whether the opening / closing door 21 is locked, and if it is not locked, step S6.
Lock the open / close door 21 with. These judgments are made by a detector such as a limit switch.

Then, in step S7, it is checked again whether the discharge plate 22 is pulled in, the opening / closing door 21 is closed, or the opening / closing door 21 is locked. If all are OK, the undulating pipe is set in step S8. It is determined whether or not 33 has risen. If not, in step S9, the undulating pipe 3
Raise 3 After this, in step S10 the expansion tube 35
Is expanded, and if it is not expanded, the telescopic tube 35 is expanded in step S11.

Next, in step S12, the sensors 42, 4
Based on the output state of No. 3, it is determined which of the left and right sides the suction pipe 30 is in the suction work area. That is, when the sensor 42 is “H” and the sensor 43 is “L”, it is determined that the suction pipe 30 is in the left suction work area, and when the sensor 42 is “L” and the sensor 43 is “H”. Determines that the suction tube 30 is in the right suction work area. In addition, the sensors 42, 43
When both are "L" or "H", the sensors 42, 43
Is regarded as abnormal and an error is displayed on an appropriate display section.

First, when it is determined that the sensor 42 is "H" and the sensor 43 is "L" and the suction tube 30 is in the left suction work area, the suction tube 30 is swung right in step S13, and step S14 is performed. From step S23 to step S24, whether the suction tube 30 is in the storage area Z, that is, the sensors 42, 4
It is determined whether or not both of the sensors 3 are “H”, and the sensors 42,
If both 43 become "H", it is determined that the suction tube 30 is located in the storage area Z, and the turning of the suction tube 30 is stopped in step S37.

When the suction tube 30 is stopped in the storage area Z in this way, the retractable tube 35 is retracted in steps S38 to 41, and the undulating tube 33 is lowered to end the storage of the suction tube 30.

Here, when an abnormality occurs in either of the sensors 42, 43 when the suction tube 30 is turned rightward in the storage area Z, the turning operation of the suction tube 30 is performed in steps S14 to S23. I'm trying to stop.

Specifically, first, when the sensor 42 is normal and the sensor 43 is abnormal, the suction tube 30 is moved to the storage area Z.
Even if the pressure reaches, the sensors 42 and 43 do not become "H" in step S24, the suction pipe 30 continues to rotate, and the suction work area on the opposite side (in this case, the right suction work area)
It will turn up to. However, if the sensor 42 determines "H" or "L" in step S14 and the suction tube 30 reaches the specific swivel range DL and becomes "L", the first timer is set in step S15, and this first timer is used. If it cannot be determined in step S24 that the suction tube 30 has reached the storage area Z while the set time has elapsed, it is regarded as abnormal, an error is displayed in step S16, and the swirling operation of the suction tube 30 is forced. Stop. The first
The timer is set to a time in which the suction pipe 30 does not turn to the suction work area on the opposite side, and therefore the suction pipe 30 stops in the specific turning area DR beyond the storage area Z without protruding to the opposite side of the vehicle. It will be.

If the sensor 43 is normal and the sensor 42 is abnormal and does not change from "H" to "L", is there a rise of the sensor 43 to "H" level in step S19? determine whether, when there is a rise, and sets the flag F ₁ in step S20, the flag F ₁ is determined whether or not set in step S21,
If the flag F ₁ is set, the second value is set in step S22.
The timer is set, and while the time set by the second timer elapses, the suction tube 30 is moved to the storage area Z in step S24.
If it cannot be determined that the suction time has reached, the error is displayed in step S23, and the turning operation of the suction tube 30 is forcibly stopped. That is, when the sensor 43 rises to the “H” level, the second timer is set,
After this time has elapsed, the right turning operation of the suction pipe 30 is stopped, and the suction pipe 30 stops in the specific turning region DR beyond the storage region Z without projecting to the opposite side of the vehicle. The second timer is also the same as the first timer.
Is set so that it does not turn to the suction work area on the opposite side.

In step S12, the sensor 4
Even when 2 is “L”, the sensor 43 is “H”, and the suction tube 30 is in the right suction work area, when the suction tube 30 is turned to the left in step S25 and an abnormality occurs in the sensors 42 and 43, In steps S26 to S35, substantially the same processing as described above is performed. That is, when an abnormality occurs in the sensor 42, the left turning operation of the suction pipe 30 is forcibly stopped by the operation of the first timer, and when an abnormality occurs in the sensor 43, the suction operation is performed by the second timer. The turning motion of the tube 30 is forcibly stopped.

That is, the above-mentioned steps S14 to S2
3. Steps S26 to S35 constitute stop means for stopping the turning of the suction pipe 30 when a predetermined time has elapsed after the operation of the first timer or when a predetermined time has elapsed after the operation of the second timer.

By controlling the suction pipe 30 to be stored in this manner, even if an abnormality occurs in the sensors 42 and 43, there is no danger of the suction pipe 30 turning to the side of the vehicle on the opposite side, and it is safe.

[0033]

As described above, according to the present invention, when the suction pipe is stored, even if an abnormality occurs in the position detecting device, there is a risk that the suction pipe will turn to the side of the opposite vehicle. Instead, for example, in the case of work on the road, it is possible to prevent a contact accident with a passing vehicle.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an outline of a dust suction / transport system using a dust suction truck of the present invention.

FIG. 2 is a side view showing a configuration of a dust suction truck.

FIG. 3 is a plan view showing a position detection device.

FIG. 4 is a plan view showing each swirl region of the suction tube.

FIG. 5 is an output signal diagram showing an output signal of the position detection device.

FIG. 6 is a flowchart illustrating control when the suction tube is stored.

FIG. 7 is a flowchart illustrating control when the suction tube is stored.

FIG. 8 is a flowchart illustrating control when the suction tube is stored.

FIG. 9 is a flowchart illustrating control when the suction tube is stored.

FIG. 10 is a flowchart illustrating control when the suction tube is stored.

[Explanation of symbols]

 20 Dust storage tank 30 Suction pipe 40 Position detection device C Dust suction wheel DL, DR Specific turning area WL Left suction work area WR Right suction work area Z Storage area

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiro Egashira 6-107 Takino-cho, Nishinomiya-shi, Hyogo Shinmeiwa Industry Co., Ltd. Development Technology Headquarters (72) Inventor Koichi Okamoto 6-107 Takino-cho, Nishinomiya-shi, Hyogo Shinmeiwa Industry Co., Ltd. (56) References JP-A-2-89701 (JP, A)

Claims (1)

(57) [Claims] 1. A garbage storage tank mounted on a vehicle frame,
A suction pipe which has a base end vertically supported on the upper surface of the dust storage tank and is rotatable, and a suction pipe which is disposed along the rear wall of the dust storage tank and swivels to the side of the vehicle. A position detection device for detecting which position of the suction work area where the dust suction work is performed, and which rotation position of the specific rotation area set between the storage area and the suction work area, and the position detection device. In a garbage suction vehicle equipped with a control device for automatically storing the suction pipe from the suction work area to the storage area based on the signal of the above, when the suction pipe reaches the specific turning area from the suction work area, A first timer that operates according to an output signal from the position detection device; a second timer that operates according to an output signal from the position detection device when the suction pipe reaches the storage region from the specific swirl region; Specified time after the timer operates Elapsed time, or dust suction wheel, characterized in that a stopping means operating after a predetermined time of the second timer stops the pivoting of the suction pipe when the elapsed.