JPS5837616Y2 - Discharge device for two-shaft concrete mixer - Google Patents

Description

[Detailed description of the invention] This invention relates to a discharge device for a two-wheeled concrete mixer.

The two-shaft concrete mixer will be explained with reference to FIG. 1 of the attached drawings. Inside the mixing tank 1, three mixing shafts 2,
2 are attached in parallel, a plurality of arms 3 are fixed to each of the crosstalk shafts 2, 2, and a blade 4 is attached to each of the arms 3.

Such a mixer normally has a discharge port formed at the bottom of the mixing tank, and this discharge port is opened and closed by a gate, but if the above-mentioned discharge port is formed below each of the mixing shafts, , the contaminants flowing out from the discharge port tend to get caught between one side edge of the discharge port and the blade, and the impact caused by this jamming causes the one side edge of the discharge port,
Another disadvantage is that the blade etc. are easily damaged.

In order to solve this problem, a discharge port 22 is formed at the center of the bottom of the kneading tank 21 as shown in FIG.
Conventionally, there has been a discharge device in which a rotatable gate 23 is used to open and close the discharge device.

However, in the above-mentioned discharge device, an arcuate surface 25 is formed around the rotation support portion 24 of the gate 23 on the outer periphery of the gate 23, and the arcuate surface 25 is made to face the inside of the mixing tank 21 so that the discharge port 2
2 is completely closed, in a crosstalk state, the blade 27 is located between the lower intersection of the two rotational trajectories of the blades 27 centering on each crosstalk axis 26 and the upper surface of the gate 23.
This has the disadvantage that a tread space is created in which wires cannot be mixed, and the entire kneading tank cannot be agitated.

This invention solves the above-mentioned drawbacks and provides a discharge device that can smoothly discharge mixed materials and uniformly knead them throughout the kneading tank.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIGS. 1 to 3, at the bottom of the kneading tank 1,
A narrow discharge port 5 is formed in the center between both side plates.

This discharge port 5 opens between both end plates of the kneading tank 1,
A gate shaft 6.parallel to one side edge of the discharge port 5. is attached, and one side edge of a gate 7 is fixed to this gate shaft 6.

The shaft 6 is rotatably supported at both ends by bearings 8 fixed to both end plates of the kneading tank 1, as shown in FIG. When activated, it rotates by a predetermined angle.

The driving means is, for example, as shown in FIG.
A swingable cylinder 9 is provided on the outside of the cylinder 9.
The piston rod 10 is connected to the end of a lever 11 fixed to the end of the gate shaft 6.

When the piston rod 10 of the cylinder 9 is advanced, the second
The gate 7 located at the chain line position A in the figure moves to the solid line position,
A seal plate 12 fixed to the other side edge of the gate 7 engages with the other side edge of the discharge port 6.

The gate 7 has a bulge whose upper side protrudes into the kneading tank 1 in the closed state, and both sides 7 of the bulge extend along the rotation locus of the tip of the blade 4 centered on each crosstalk axis 2. The top part 7 of the slanted bulge is close to the lower intersection part 2 of the two rotation locus openings.

Now, put the gate 7 in the closed state shown by the solid line in Fig. 2,
When cement and aggregate are placed in the mixing tank 1 and the stirring shafts 2, 2 are rotated in the direction of the arrow in FIG. 1, they are mixed by the blade 4 fixed to the arm 3.

In this crosstalk state, the blade 4 rotates along the upper surface of the gate 7, so that the object to be mixed located at the upper part of the gate 7 is reliably swept up without being accumulated in the upper part of the gate 7.

Therefore, the materials to be mixed can be effectively and uniformly kneaded throughout the interior of the kneading tank 1.

When the kneading is completed, the piston rod 10 of the cylinder 9 is moved forward, and the gate 7 is opened as shown by the chain line in FIG.

As a result, the contaminants flow out from the discharge port 5 due to natural fall and the rotational action of the blade 4.

In this case, the contaminants flow out from the outlet at the center of the bottom of the kneading tank, and on the other hand, the blade that sends out the contaminants is rotating in the direction of the arrow in Figure 1, so the contaminants do not get caught.
It can be discharged smoothly.

As described above, according to this invention, it is possible to prevent the mixed material from getting caught between the blade and the side edge of the discharge port when discharging the mixed material, and moreover, it is possible to prevent the mixed material from getting caught between the blade and the side edge of the discharge port. The upper side is a bulge that protrudes into the kneading tank, and both sides of the bulge are tilted along the rotation locus of the blade around each mixing axis, and the bulge is formed at the lower intersection of the two rotation trajectories. Since the tops of the gates are placed close to each other, it is possible to prevent a dead space above the gate from being created by the blades, where crosstalk is not possible.

As a result, the material to be mixed above the gate can be reliably kneaded, and the material to be mixed can be kneaded uniformly and reliably over the entire kneading tank.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional front view of a two-shaft concrete mixer, Figure 2
The figure is an enlarged longitudinal sectional front view of the same discharge unit as above, Figure 3 is a longitudinal side view of Figure 2, Figure 4 is a side view of Figure 1, and Figure 5 is a schematic diagram showing a conventional discharge device. It is. 1...Kneading tank, 2...Kneading shaft, 3...
...Arm, 4...Blade, 5...
...Exhaust port, 7...Gate.

Claims (1)

[Scope of utility model registration request] In a two-shaft concrete mixer in which two mixing shafts are installed in parallel inside a mixing tank, a plurality of arms are fixed to each mixing shaft, and a blade is attached to the tip of each of the arms, the center of the bottom of the mixing tank is A discharge port extending between both end plates of the kneading tank is formed in the section, and one side of the gate for opening and closing this discharge port is swingably attached to the kneading tank, and the upper side of the gate facing the inside of the kneading tank is fully closed. is a bulge protruding into the kneading tank,
Both sides of this bulge are inclined along the rotation locus of the tip of the blade around each cross-wire axis, and the top of the bulge is brought close to the lower intersection of the blade rotation locus centered on both hot wire axes. A discharge device for a two-shaft concrete mixer characterized by: