JPS5931372Y2 - Sewage sump device for concrete mixer truck - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sewage sump device for a concrete mixer truck, which is installed on a concrete mixer truck and temporarily stores washing wastewater from the mixer truck.

Some modern concrete mixer trucks are equipped with sewage storage devices, and the wastewater generated from washing the ready-mixed concrete discharge chute at the pouring site is temporarily stored in the on-board sewage tank. The collected wastewater is then discharged and dumped at a base with wastewater treatment equipment1.For mixer trucks that do not have a sewage storage device, the wastewater is temporarily stored in the mixer's drum, or is disposed of separately. The sewage is temporarily stored in the drum tubes they carry, and then the drum tubes are taken back to the base and disposed of there.

This is in response to stricter environmental pollution regulations, which prohibit the dumping of washed wastewater at work sites.

By the way, in conventional sewage storage systems, the sewage tank is equipped with an outlet and a discharge valve, and when returning to the base, the driver gets out of the car, goes to the sewage tank, opens the discharge valve, and drains the sewage. However, such disposal operations not only make it troublesome and time-consuming for the driver to get on and off the vehicle, but also require a long waiting time when discharging due to natural drainage, which makes it difficult to dispose of wastewater. The drawback was that the work efficiency was extremely low, and people often forgot to discharge even small amounts of waste water.

The present invention has been made to solve the above-mentioned drawbacks, and the purpose of the present invention is to enable the driver to quickly dump and dispose of the sewage in the sewage tank without leaving the driver's seat. An object of the present invention is to provide a sewage storage device for a mixer truck.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

The box-shaped sewage tank 1 attached to the sewage storage device of the embodiment is as follows:
As shown in FIGS. 1 to 3, a stand rod 3a, which is mounted on the rear left end of the vehicle body frame 2 and extends horizontally from the base plate 3 on which the sewage tank 1 is placed, extends from the frame 2. The swing arm 5 is fitted into an L-shaped swing arm 5 which is pivotally attached to the rear end of the bracket 4 which projects rearward so as to be movable and adjustable in the axial direction of the base rod 3a.

The swing arm 5 is prevented from rotating by a tooth plate 4a of the bracket 4 by a lock pin 6 at a position facing leftward of the vehicle body, and also by a locking member protruding from the lower end of one side of the sewage tank 1. The connecting tongue piece 7 is fixed by a lock pin 9 to a stop plate 8 which is provided rearwardly projecting below the corner of the pedestal 2.

During the cleaning operation, the lock pin 9 is removed and the swing arm 5 is swung backwards and rotated again to the toothed plate 4a by the lock pin 6, as shown in chain lines in FIG. 2 and in FIG. It will be stopped.

In this state, the sewage tank 1 is in contact with the lower end of the chute 10 for discharging ready-mixed concrete that has been rotated backwards, so that the washing water flowing down from the chute 10 can be received in the sewage tank 1. ing.

In addition, an existing near compressor 11 and a compressed air tank 12 are installed under the floor at the middle part of the frame 2 in the longitudinal direction, and the air discharged from the compressor 11 is stored in the compressed air tank 12.

Next, a lid 15 made of a rectangular plate is attached to one side of the opening of the box 13, which forms the main body of the sewage tank 1 and whose top surface is open, via hinges 14 on both sides. For example, it has a habit of closing due to its own weight.

Furthermore, a rubber bag 16 molded into a shape that is almost in contact with the inner wall is attached to the inside of the box 13, and the bag opening of the rubber bag 16 is attached to the box 13 in a state where it is clamped by an attachment band 17.
It is tightly fixed to the inner wall of the opening edge with a plurality of bolts 18.

Furthermore, in the center of the outer wall on the side of the opening opposite to the hinge 14,
A fork 19 is provided in a protruding manner, and the center of a hook lever 20 is pivotally supported on the fork 19, and the hook lever 20 is biased to swing counterclockwise in FIG. 3 by a spring (not shown). There is.

Thus, the hook 20a at the upper end of the hook lever 20 locks the lid 15 in the closed position in the closed position, and
The upper edge of the hook 20a is tapered, so that when the lid 15 falls, the hook lever 20 is driven to swing clockwise against the spring bias.

Further, a diagonally bent passive piece 20b is formed at the lower end of the hook lever 20, and the passive piece 20b has a box 1
The operating rod 21a of the cylinder 21 fixed to the outer wall of the cylinder 3 is in contact with the cylinder 21.

In addition, near the center of the lower end of the side of the box from which the hinge 14 protrudes, a T-shaped cap 22 is installed as an air inlet that communicates with the inside of the box 13, and the outside of the cap 22 is connected to the driver's seat. Fixed piping 2 via electromagnetic air valve 23 remotely controlled from
4 and a floating pipe 25 to the air tank 12 , and the branch side of the base 22 is connected to the cylinder 21 by a pipe 26 .

Next, the operation and operation of the sewage sump device according to the embodiment constructed as described above will be described.

First, when the chute 10 is washed with water in the state shown in FIG. 4, waste water from washing is stored in the sewage tank 1.

After the cleaning work is completed, if the lid 15 is tilted backwards, the lid 15 will close under its own weight and be automatically locked to the hook 20a. Then, it is fixed to the stop plate 8 using the lock pin 9.

Next, when returning to the base after completing a series of field work, the mixer truck is parked with the rear left side of the vehicle facing the wastewater treatment facility.

Next, when the electromagnetic air valve 23 is opened by an operation from the driver's seat, high-pressure air is sent to the space between the inner wall of the box 13 and the outer surface of the garbage bag 16 through the pipes 24 and 25, and
At the same time, air is supplied to the cylinder 21 through the piping 26, and as a result, as shown in FIG.
is raised and the lock lever 20 is driven clockwise to release the lid 15 from the hook 20a, and
The rubber bag 16 is turned inside out by the internal pressure and bulges out from the top opening of the box 13, and as a result, the stored sewage rapidly flows out from the four circumferences of the sewage tank 1 while pushing up the lid 15.

When the sewage has finished bathing, the electromagnetic air valve 23 is switched to create static pressure in the pipe 24, and the weight of the lid 15 pushes the rubber bag 16 back into the box 13, and then the lid is closed. When the lid 15 is closed, the hook lever 20 swings back under the force of the spring, and the lid 15 is automatically locked.

In this way, with the driver in the driver's seat, the disposal of sewage is completed in a short time, and the sewage tank 1 is brought into a safe driving state with the lid 15 closed.

As described above, according to the sewage tank device for a mixer truck according to the present invention, by supplying high-pressure air to the sewage tank by remote control, the closing lock of the tank lid is released, and at the same time, the inside of the tank is The rubber bag containing the accumulated sewage is turned inside out and bulged out, allowing the sewage to drain out of the tank, so when disposing of the sewage, it can be disposed of quickly without unnecessary waiting time. It becomes possible to dump sewage outside, thus having the effect of increasing the working efficiency of the sewage sump device.

[Brief explanation of the drawing]

Fig. 1 is a side view of a sewage sump device for a mixer truck showing an embodiment of the present invention, Fig. 2 is a partial top view taken along the line ■-■ in Fig. 4 is a partial operational diagram of FIG. 1, and FIG. 5 is an operational diagram of FIG. 3. 1... Sewage tank, 12... Air tank, 15... Lid, 16... Rubber bag, 20a... Hook, 21...
Servo cylinder, 22... Inlet mouthpiece, 23... Electromagnetic air valve, 24. 25, 26... Piping.

Claims (1)

[Scope of utility model registration request] A sewage tank installed on a concrete mixer truck to receive and temporarily store wastewater from the work of the mixer truck, with an air inlet near the bottom and a lid with a closing behavior at the top opening. a rubber bag formed into a shape that is almost inscribed in the sewage tank and whose opening is tightly fixed to the inner wall of the opening of the sewage tank, and a rubber bag that is filled with high-pressure air from a compressed air tank mounted on the vehicle. , through a remotely operated air valve,
A sewage sump device for a concrete mixer truck, characterized in that it is equipped with an air pipe configured to supply air to the inlet.