JPH0329562B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Field of Application The present invention is applicable to the field of mixer trucks, particularly mixer trucks in which a rotating drum is provided in an inclined manner and a spiral blade is installed in the drum. It is something that will be done.

(b) Conventional technology In general, for mixer trucks with spiral blades installed in the drum, after the work is completed, cleaning water is poured into the drum and the drum is rotated to clean the concrete attached to the blades and drum. However, cleaning was difficult because the cleaning water could not reach the front side of the blade facing the front of the drum.

Therefore, in the past, a hole was drilled in the middle of the blade,
A hole was drilled in the base of the blade (connection to the drum) to clean the front of the blade.

(c) Problems to be Solved by the Invention However, in general, the cross-sectional shape of the blade is erected approximately perpendicular to the inner surface of the drum.

Therefore, in the case of the former structure, the cleaning water that has passed through the holes will either fall vertically under its own weight or be blown to the front of the drum by the water pressure caused by the difference in height from the water surface, making it difficult to clean the front of the blade sufficiently. The drawback is that it cannot be done.

In the latter case, it is possible to clean the joint, but if the hole is made larger to improve the cleaning effect, the connection with the drum becomes weaker, and when concrete is discharged, the concrete flows backward through the hole. The disadvantage is that the discharge does not take place quickly.

(d) Means for Solving the Problems The present invention includes a drum having a hopper and a discharge port on the rear side, which is rotatably supported on the vehicle body in a tilted forward downward direction, and a spiral blade is provided on the inner surface of the drum. In a mixer truck that is set upright, the blades are set upright so that the cross section of the blades is substantially perpendicular to the inner surface of the drum, and a plurality of cleaning holes are provided at intermediate positions of the blades, and the blades are provided with a plurality of holes for cleaning. This invention relates to a blade structure for a mixer truck, which is provided with a guide plate facing the front side of the drum and guiding the cleaning water that has passed through the hole to the front surface of the blade facing toward the front side of the drum.

(e) Embodiment An embodiment will be described below with reference to the drawings. Reference numeral 1 denotes a vehicle body, and front and rear support legs 2 and 3 are provided on the vehicle body 1, and a drum 4 is supported by the front and rear support legs 2 and 3. It is rotatably supported in a tilted position.

The drum 4 is rotated by a drive motor 5 provided at the front.

Further, a spiral blade 6 is provided upright within the drum 4, a feeding hopper 7 is connected to the center of the rear portion of the drum 4, and a discharge port 8 is formed on the outer periphery.

The cross section of the blade 6 is erected approximately perpendicularly to the inner surface of the drum 4, and when the drum rotates, the blade 6
has come to exert a transport effect.

When the drum 4 is rotated in the normal direction with the above configuration, the hopper 7
The concrete put in from the drum 4 is sent forward by a blade 6 and stirred in the drum 4, and when the drum 4 is reversed, the concrete in the drum 4 is pushed by the blade 6 and discharged from the discharge port 8. .

Reference numeral 9 denotes a cleaning hole formed at an intermediate position of the blade 6, and a plurality of holes 9 are provided at appropriate intervals.

The holes 9..., as shown in FIG.
By cutting out a part of the plate and pushing and bending that part of the plate toward the front of the drum 4, that plate becomes the guide plate 10...
... is formed on the guide plate 1, and the cleaning water passing through the hole 9 flows through the guide plate 1.
0... to wash the front surface of the blade 6 facing toward the front side of the drum 4.

FIG. 3 shows another embodiment in which a rectangular hole 12 is bored in the middle position of the blade 11.
A guide plate 13 is separately welded to the front surface, and the guide plate 13 guides the cleaning water to the front surface of the blade 11.

The present invention has the above-described construction, and next, the cleaning work after discharging concrete will be explained. First, cleaning water is poured from the hopper 7 while the drum 4 is rotated in the normal direction.

The cleaning water gradually moves forward along the blade 6, but at this time, the height of the cleaning water is higher than the blade 6.
If the cleaning water exceeds the hole 9..., the cleaning water is supposed to move forward through the hole 9. Therefore, the cleaning water that has passed through the hole 9...
... is guided to the front surface of the blade 6, and after cleaning the front surface of the blade 6, it moves forward.

After cleaning the interior of the drum 4 with the forward-moving cleaning water, when the cleaning water is to be discharged, the drum 4 is reversed, and the forward cleaning water is pushed by the blade 6 and discharged from the discharge port 8.

At this time, if the height of the cleaning water pushed by the blade 6 exceeds the holes 9 of the blade 6, the cleaning water will flow to the guide plate 10 as in the case of supplying the cleaning water.
Guided by..., the blade 6...washes the front surface.

(f) Effect of the invention As described above, the present invention provides a cleaning hole in the middle position of the blade, a guide plate opposite to the hole, and
Since this guide plate guides the cleaning water to the front of the blade, the front of the blade can be reliably cleaned without compromising the strength of the connection between the blade and the drum, and the cleaning time can also be shortened. can.

[Brief explanation of the drawing]

FIG. 1 is an overall view, FIG. 2 is a partially enlarged view, and FIG. 3 is another embodiment. 4 is a drum, 6 is a blade, 9 is a hole, and 10 is a guide plate.

Claims (1)

[Claims] 1. A drum with a hopper and a discharge port on the rear side is rotatably supported on the vehicle body in a tilted forward downward direction.
In the mixer truck having spiral blades erected on the inner surface of the drum, the blades are erected so that the cross section of the blades is substantially perpendicular to the inner surface of the drum, and a plurality of cleaning holes are provided at intermediate positions of the blades. A blade structure for a mixer vehicle, wherein the blade is provided with a guide plate that faces the hole and guides the cleaning water that has passed through the hole to the front surface of the blade facing toward the front side of the drum.