JPS58489Y2 - concrete mixer truck - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a concrete mixer truck, and more specifically to a washing device for a rotating drum.

When using a concrete mixer truck, after finishing work, it is necessary to wash the rotating drum with water to remove any fresh concrete that has adhered to the inside.

Conventionally, the above-mentioned washing is carried out by filling a rotating drum with water and rotating the drum at high speed, but it is difficult to remove adhesive concrete quickly and completely, so a kisser truck is used. Each time the concrete hardens, its volume gradually increases.

For this reason, concrete that has hardened and adhered to the interior of the rotating drum is periodically peeled off using a hammer or the like, but this not only takes time and effort, but also may damage the rotating drum.

This invention was made in view of the above, and an object of the present invention is to provide a concrete crosser truck configured to quickly and accurately remove fresh concrete adhering to the inside of a rotating drum.

This invention will be explained in detail below with reference to the drawings.

FIG. 1 shows one embodiment of this invention, in which 1 is a truck body.

This truck body 1 has a driver's seat 5 at the front of a chassis 4 equipped with steering wheels 2 and drive wheels 3, and a cargo platform 6 at the rear of the chassis 4, which is driven by a drive device (not shown). It runs by rotating the wheels 3.

On the loading platform 6 of the truck body 1, a conical rotating drum 1 is connected to a pivot shaft 8 provided at the bottom, and a bearing on the loading platform 6 is connected to a portion 9.
The guide wheels 10 are pivotally connected to the guide wheels 10, and the openings are supported by a plurality of guide wheels 10 (only the one on the near side is shown in the figure), so that the guide wheels 10 are rotatable in the circumferential direction.

This rotary drum 7 is used to mix fresh concrete and is equipped with a spiral blade 11 inside, which is indirectly rotated by the drive device of the truck body 1 via a hydraulic pump, a hydraulic motor, etc. It has become.

At the rear end of the chassis 4, there is a hopper 13 that charges fresh concrete into the rotating drum T via a charging cylinder 12 attached to a blade 11, and a hopper 13 that charges fresh concrete into the rotating drum T through a charging cylinder 12 attached to a blade 11. A chute 14 is provided to receive fresh concrete discharged from the opening.

Among these, the above-mentioned concrete mixer truck, which mainly consists of a truck body 1 and a rotating drum 7, is well known, and its detailed structure can be considered to be the same as or close to a conventional concrete mixer truck.

In this invention, a cleaning spray nozzle 15, which will be described later, is attached to the rotating drum 7.

The injection nozzle 15 has the following structure.

That is, FIG. 2 shows an example of the injection nozzle 15, which is attached to the inner end of the nozzle body 16, which is attached to the rotary drum 7 by penetrating the wall surface of the rotary drum 7, by means of a spring 17. A closing member (valve body) 19 for closing the internal opening end 18 is provided by slidably inserting its shaft 20 into a bearing plate 22 having a wash water circulation hole 21. , an auxiliary seal 23 made of rubber with appropriate elasticity or a material with the same effect as this,
It is attached with its outer peripheral surface 24 in contact with the inner surface of the rotating drum 7.

Therefore, when cleaning water is force-fed from a required water supply source (not shown) to the nozzle body 16 through the pipe 25 connected to the outer end of the injection nozzle 15, the cleaning water flows against the elasticity of the spring 17 and 19 to the left in this figure to open the internal opening end 18''r of the nozzle body 16, and also move the outer peripheral surface 24 of the auxiliary seal 23 away from the inner surface of the rotating drum 7, thereby separating the auxiliary seal 23 and the rotating drum 7. is injected into the rotating drum 7 from between the inner surface of the rotary drum 7 and the inner surface of the rotary drum 7.

Based on the above, the closing member 19 and the auxiliary seal 23 are designed to prevent the fresh concrete from entering the nozzle body 1 when the fresh concrete is transported.
6 to prevent it from entering and clogging it.

In addition to the above, the auxiliary seal 23 in the housing sprays cleaning water in a film shape in six directions along the inner surface of the rotating drum during cleaning, thereby completely removing adherent concrete.

FIGS. 3 to 5 show other examples of the injection nozzle 15, in which the internal opening end 27 of the nozzle body 26 is crushed and the central part thereof is notched, and this notch 28 is provided with a moderate amount of water. A closing member 29 made of hard rubber having elasticity or a material having the same effect as this is integrally fitted.

In this example), when the cleaning water is forced into the nozzle body 26 through the pipe 25, the cleaning water pushes the closing member 29 open against its elasticity (see the two-dot chain line in Figures 4 and 5) and rotates. It is injected into the drum 7.

The closing member 29 in this example also has fresh concrete attached to the nozzle body 2.
Prevent them from entering 6.

FIG. 6 shows an auxiliary cleaning nozzle 34, which consists of a long insertion pipe 30 with a large number of injection ports 31.
It is configured such that it can be inserted into the rotary drum 7 through a center hole 32 of a pivot 8 provided at the bottom of the rotary drum 7 to clean the rotary drum 7.

The pivot 8 is removably attached to a sealing stopper wing that closes the center hole 32 thereof.

By the way, the injection nozzle 15 shown in FIGS. 2 and 3 to 5 is used for the rotating drum 7 to which fresh concrete tends to adhere.
Two or more pieces are attached to the rotary drum 7 at intervals in the longitudinal and circumferential directions of the rotating drum 7.

In this case, the injection nozzle 15 may be attached to the rotating drum 7 in any manner, and may be attached so that the angle can be freely changed depending on cleaning conditions or the like, or it may be fixedly attached.

Further, a pump for pumping cleaning water to the injection nozzle 15 through the pipe 25 may be installed in the truck body 1.

The concrete mixer truck of this invention has the above structure, and the operations for transporting (mixing) and discharging fresh concrete are the same as conventional ones.

When the interior of the rotating drum 7 is washed with water after transporting fresh concrete, a pump installed on the ground or in the truck body is used to inject the injection nozzle 15 provided on the rotating drum 7.
are connected to each other, and the cleaning water is vigorously jetted into the rotating drum 7 from the jet nozzle 15.

As explained above, in the concrete mixer truck according to the present invention, the injection nozzles 15 are provided at appropriate locations on the rotating drum 7 and penetrate through the wall surface of the rotating drum 7. Ready-mixed concrete can be removed quickly and accurately.

Moreover, since it is designed to remove adhesive concrete by jetting water, it does not generate noise, unlike conventional methods that involve filling a rotating drum with water and rotating it, or using a rock drill to peel off hardened concrete. Not only can the rotating drum be washed quietly without any damage, but the rotating drum will not be damaged.

Moreover, a closing member 19° 29 is provided at the tip of the injection nozzle 15 to immediately close the nozzle body 16 after cleaning, so that fresh concrete does not enter the nozzle body 16 and clog it when the fresh concrete is transported. Never.

Furthermore, it is sufficient to simply fix the injection nozzle to the wall surface of the rotating drum by penetrating it, and there is no need to make any complicated modifications to the internal structure of the rotating drum. It can also be easily applied to drums.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and Figure 1 is a partially broken side view of a concrete mixer truck according to this invention;
FIG. 2 is a sectional view showing an example of the injection nozzle, FIG. 3 is a side view showing another example of the injection nozzle, and FIG. 4 is the (IV
= IV) A cross-sectional view along the line, Figure 5 is (V-V) in Figure 3.
A cross-sectional view taken along a line, and FIG. 6 is a side view showing another example of an injection nozzle. 6... Loading platform, 7... Rotating drum, 15
...Injection nozzle, 19...Closing member,
29...Closing member.

Claims (1)

[Scope of utility model registration request] For a concrete mixer truck comprising a rotating drum for storing fresh concrete mounted on a loading platform, a plurality of injection nozzles are spaced apart from each other in the longitudinal and circumferential directions of the rotating drum and are fixedly installed through the wall surface of the rotating drum. The outer end of the injection nozzle is configured to be connected to a required water supply source via a pipe, while the tip of the nozzle body of the injection nozzle opened in the rotating drum is connected to the injection nozzle. Concrete characterized by being equipped with a closing member that opens by the water pressure of the cleaning water to spray the cleaning water when the cleaning water is sent, and that closes the injection nozzle when the supply of the cleaning water is stopped. mixer truck.