JPH0427624Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is used in the field of reducing the amount of raw concrete that adheres to the outer wall of an extension chute.

(b) Conventional technology As shown in Fig. 4, a conventional mixer truck has two sheets spirally installed on the inner wall of the drum 01 and with a phase of approximately 180° over the entire length of the drum 01. The blades 02, 02, the outer wall of the cylindrical chute 03 provided on the same center line as the drum 01 at the rear of the drum 01, the inner edge of the chute 03, and the blade 0
The outer wall of the extended chute 04 provided between the two inner edges forms a spiral discharge path 05 for discharging raw concrete.

(C) Problems to be solved by the invention Due to the above structure, raw concrete tends to stick inside the unloading path 05, and if left as is,
There was a problem in that the unloading path 05 became narrow due to the solidified raw concrete, making it extremely difficult to discharge the raw concrete in the drum 01.

Therefore, the stuck green concrete is peeled off, but since the green concrete stuck to the outer wall of the extension chute 04 is far away from the rear of the drum 01, there is a problem that it is difficult to peel off.

(d) Means for solving the problem The present invention was made to solve the above-mentioned problem. In a mixer truck in which a spiral discharge path is formed by a main chute outer wall provided at the main chute and an extended chute outer wall connected to the inner edge of the main chute,
The extended chute is supported by a connecting member on the main chute, and the inner edge of the extended chute is raised toward the center of the drum above the inner wall of the main chute to form a cleaning port.

(e) Embodiment An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a mixer drum rotatably mounted on a vehicle body 2, and this drum 1 is rotated by a drive device (not shown). It is becoming more and more like this. Inside the drum 1, two blades 3, 3 are spirally provided with a phase of approximately 180° over the entire length of the drum 1.

In addition, at the rear of the drum 1, a main chute 4 is attached to the inner edge of the blades 1, 1 on the same center line as the drum 1, and a pair of triangular extension chutes 5, 5 are attached to the inner edge of the main chute 4 and the blades 1, 1.
It is located between the inner edges.

The main chute 4 is a cylindrical chute 4a.
and auxiliary chute 4b, 4b connected to this cylindrical chute.

Reference numerals 6, 6 denote a spiral discharge path formed by the main chute 4, the outer wall of the extension chute 5, 5, the blades 3, 3, and the inner wall of the drum 1; The raw concrete thus prepared is led out of the drum 1 by rotating the drum 1.

The extension chutes 5, 5 are used to prevent raw concrete from flowing out from the rear of the drum 1 when the mixer truck climbs a slope, and as shown in FIG. 4
b, 4b are welded to the blades 3, 3, and the other end is detachably attached to the extension chute 5, 5 by means of connecting members 8, 8, which are fastened with bolts 7.

Furthermore, the coupling members 8, 8 on the side of the auxiliary chute 4b, 4b connect the outer surface of one end with the auxiliary chute 4b, 4b.
and the inner wall of the extension chute 5, 5 is welded to the inner wall of the other end, and the outer wall of the extension chute 5, 5 is fixed with a bolt 7. Cleaning ports 9, 9 are provided in an open state.

Note that 10 is a hopper that guides the raw concrete into the drum 1.

By the way, in this embodiment, the main chute is composed of a cylindrical chute and an auxiliary chute, but
The auxiliary chute may be eliminated and only a cylindrical chute is used, and although the extension chute is made detachable, it may be of a fixed type.

The present invention has the above-mentioned structure, and its operation will be explained next. When transporting raw concrete to a pouring site, the raw concrete is stored in the drum 1 through the hopper 10 and the main chute 4. As shown in the figure, a part of the raw contreat is located between main shoot 4 and main shoot 4.
The green concrete enters the discharge passages 6, 6 through the cleaning ports 9 of the extension chutes 5, 5, and when the green concrete is discharged, the green concrete adhering to the outer walls of the extension chutes 5, 5 is removed and stored in the drum 1.

The stored raw concrete is transported to the pouring site with the drum 1 rotated in normal rotation to prevent it from hardening, that is, with the raw concrete being stirred at the front of the drum 1.

At this time, even if the mixer truck climbs up the slope, the extension chutes 5, 5 are raised toward the inner wall, so that the mixture will not flow out from the rear of the drum 1.

When arriving at the pouring site, the drum 1 is reversed and the raw concrete is discharged to the outside of the drum 1 through the delivery paths 6, 6.

After that, when water is injected from the hopper 10 in order to clean the inside of the drum 1, a part of the water passes through the main chute 4 from the hopper 10 and enters the main chute 4.
The fresh concrete that has adhered to the outer walls, etc. of the extension chutes 5, 5 is washed away by entering the discharge paths 6, 6 through the washing ports 9 of the extension chutes 5, 5.

Then, the fixed raw concrete that cannot be washed away with water is peeled off by removing the extension plates 5, 5.

(f) Effect of the device As described above, according to the present device, the inner edge side of the extension chute is opened toward the center of the drum in a state raised higher than the inner wall of the main chute.
The flow of ready-mixed concrete when poured and the flow of water when pouring water will reduce the chance of the ready-mixed concrete adhering and sticking to the outer walls of the extension chutes.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of a mixer truck, FIG. 2 is a view taken along arrow A in FIG. 1, FIG. 3 is a sectional view of a main part, and FIG. 4 is a sectional view of a conventional main part. 1 is a drum, 3 is a blade, 4 is a main chute, 5 is an extension chute, 6 is an ejection path, 8 is a connecting member, and 9 is a cleaning port.

Claims (1)

[Scope of utility model registration request] A spiral delivery path is formed by the inner wall of the drum, the blade provided spirally on the inner wall of the drum, the outer main chute wall provided on the same center line as the drum at the rear of the drum, and the outer wall of an extended chute connected to the inner edge of the main chute. In the mixer truck, the extension chute is supported by a connecting member on the main chute, and the inner edge of the extension chute is raised toward the center of the drum above the inner wall of the main chute to form a cleaning port.