JPS58493Y2 - Concrete mixer car rotating drum - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating drum provided in a concrete mixer truck, and more particularly to a blade provided on the inner surface of the rotating drum.

As is well known, the rotating drum of a concrete mixer truck is
As shown in FIG. 1, a blade 4 is spirally provided on the inner surface of the rotary drum body 1 from the bottom 2 to the mouth 3 of the rotary drum body 1, and the mouth 3 of the rotary drum body 1 has a cylindrical blade 4. It has a structure in which a charging cylinder 5 is supported and attached to the blade 4, and the rotating drum body 1
When the rotary drum body 1 rotates forward in the forward direction, the fresh concrete charged from the charging cylinder 5 is stirred by the blade 4, and when the rotary drum body 1 rotates in the reverse direction, the fresh concrete in the rotary drum body 1 is discharged from the mouth portion 3 by the blade 4. It has become.

By the way, in the above-mentioned rotating drum, concrete adheres to the blade 4 each time it is used, and the amount of concrete adheres to the blade 4 gradually increases, so it is necessary to periodically peel off the concrete adhered to the blade 4.

The above-mentioned peeling work is performed by an operator entering the rotating drum and using a rock drill or the like.

However, the charging cylinder 5 gets in the way of the discharge blade section 6 on the mouth section 3 side of the rotary drum main body 1, making it extremely difficult to remove the concrete stuck to the discharge blade section 6. .

For this reason, there was a problem in that the amount of concrete fixed to the discharge blade portion 6 gradually increased, thereby narrowing the discharge passage between the inner surface of the rotary drum body 1 on the side of the mouth portion 3 and the outer surface of the charging cylinder 5.

The present invention has been developed in view of the above circumstances, and its purpose is to provide a rotating drum that allows easy removal of concrete stuck to the discharge blade.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4.

Reference numeral 8 in the figure denotes a rotating drum main body, and a blade 10 is spirally provided on the inner surface of the rotating drum main body 8 from the bottom (not shown) to the mouth 9.
A charging cylinder 11 is provided supported by.

The blade 10 is made of a steel plate, and has a discharge blade portion 10a located on the mouth 9 side of the rotary drum body 8.
is the inner surface of the rotating drum body 8 and the charging cylinder 1
It is removably attached to the outer surface of 1.

That is, mounting fittings 12 are provided on the inner surface of the rotary drum body 8 on the side of the mouth 9 and on the outer surface of the charging cylinder 11 facing thereto, while the discharging blade portion 10a
A bolt mounting hole 13 is formed at a position facing the mounting bracket 12 of the discharge blade portion 10a.
3 to match the hole 14 formed in the mounting bracket 12,
By inserting the headed bolt 15 from the bolt mounting hole 13 into the hole 14 and tightening the nut 16 onto the tip of the headed bolt 15 protruding from the hole 14, the discharge blade section 10 is removed.
a is attached to the inner surface of the rotating drum main body 8 and the outer surface of the charging cylinder 11.

Further, the portion 10b of the blade 10 other than the discharge blade portion 10a is fixed to the inner surface of the rotating drum main body 8 and the outer surface of the charging cylinder 10 by means such as welding, as in the conventional case.

Further, the discharge blade portion 10a of the blade 10 and the other portion 10b are removably joined by a headed bolt 17.

The rotating drum of the concrete mixer truck according to the present invention has the above-mentioned configuration. Fresh concrete is put into the rotating drum main body 8 through the charging cylinder 11, the rotating drum main body 8 is rotated in the normal direction, and the fresh concrete is mixed with the blade 10. While stirring, the rotary drum main body 8 is reversed and the fresh concrete is discharged from the mouth part 9 by the blade 10, which is the same as in the conventional method.

According to the above embodiment, the discharge blade portion 10a of the blade 10 is attached to the other portion 10b with the headed bolt 1.
7 and is removably attached via a headed bolt 15.
Since it is removably attached to the inner surface of the rotating drum main body 8 and the outer surface of the charging cylinder 11 via the mounting bracket 12, when peeling off fixed concrete,
Once the discharge blade part 10a is removed from the other part 1 of the blade 10,
0b, the inner surface of the rotating drum main body 8, and the outer surface of the charging cylinder 11, and can be taken out from the mouth 9.

Therefore, there is no need to peel off the concrete stuck to the discharge blade portion 10a within the rotating drum body 8, and the concrete peeling work can be easily and quickly performed without being hindered by the charging cylinder 11. Furthermore, concrete stuck to the back surface of the discharge blade portion 10a, which could hardly be peeled off in the past, can be easily peeled off.

After the concrete peeling work is completed, the discharge blade section 10a is inserted into the rotary drum body 8 through the mouth 9 of the rotary drum body 8, and the bolt attachment hole 13 of the discharge blade section 10a is connected to the hole 14 of the mounting bracket 12. After matching, the head bolt 15 is inserted into the bolt mounting hole 13 and the hole 14, and the nut 16 is screwed and tightened to easily attach it to the inner surface of the rotating drum body 8 and the outer surface of the charging cylinder 11. be able to.

In the above embodiment, only the discharge blade portion 10a may be made of a non-metallic material such as synthetic resin or wood instead of a steel plate.

In this way, when the ready-mixed concrete is discharged, almost no ready-mixed concrete adheres to the discharge blade portion 10a, and
The concrete peeling work can be reduced, and the weight of the housing blade 10 can be reduced.

A female thread may be formed in the hole 14 of the old mounting bracket 12 in advance.

In this way, the nut 16 can be omitted, and the screwing and tightening work of the headed bolt 15 becomes easy.

As explained above, according to the present invention, the discharge blade portion of the blade located on the rotary drum body mouth side is removably joined to the other parts of the blade, the rotary drum body, and the charging cylinder. Therefore, when peeling off concrete stuck to the discharge blade part, the discharge blade part can be temporarily taken out from the rotating drum body, and the concrete peeling work can be carried out easily and quickly.

In addition, since it becomes easier to peel off concrete stuck to the discharge blade, the problem of narrowing the discharge passage between the inner surface of the rotating drum body and the outer surface of the charging cylinder due to the concrete stuck to the discharge blade is avoided. It disappears.

Moreover, since the inner end of the charging cylinder 11 is fixed to the other part of the blade 10 by welding or the like, the charging cylinder 11 will not lose its center even if the discharge blade part 10a is removed. Therefore, it is easy to assemble the discharge blade part 10a once removed, and when manufacturing the rotating drum, after correctly stopping and temporarily fixing the charging cylinder 11 with the discharge blade part 10a, other parts of the blade 10 can be assembled. 10b, the charging cylinder can be accurately and easily attached to the rotating drum body.

Another advantage is that if the discharge blade section is damaged, it can be easily replaced with a new one.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view of a conventional rotating drum;
The figure is an end view of the mouth of the rotating drum of the present invention, and Figure 3 is the second
FIG. 4 is an enlarged view of portion A in FIG. 3. 8... Rotating drum body, 9... Mouth part,
10...Blade, 10a...Discharge blade part, 10b...Other parts of blade, 1
1...Charging cylinder, 12...
・Mounting bracket, 15... Headed bolt, 17...
...headed bolt.

Claims (1)

[Scope of utility model registration request] A blade 10 is spirally provided on the inner surface of the rotary drum body 8 from the bottom to the mouth 9 of the rotary drum body 8, and a charging cylinder 11 is provided at the mouth 9 of the rotary drum body 8 to control the rotation of the blade 10. In a rotating drum of a concrete mixer truck, which is supported and attached to a discharge blade section 10a located on the mouth 9 side of the drum body 80 and another portion 10b of the blade 10 connected to this discharge blade section 10a, the discharge blade section is 10a is the other part 10b of the blade 10 and the rotating drum main body 8.
and charging cylinder 11 respectively.
, 15, and the blade 1 is removably attached to the blade 1.
The other part 10b of the concrete mixer truck is characterized in that the other part 10b of the concrete mixer truck is fixed to a charging cylinder 11.