JPS61213105A - Concrete-fixation preventive device in rotary drum for concrete mixer truck - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a concrete sticking prevention device that is attached to a charging cylinder lζ of a rotating drum provided in a concrete mixer truck.

(Prior Art) As is well known, the rotating drum of a concrete mixer truck is mounted on a chassis 2 of a truck body 1, as shown in FIGS. Two spiral blades 6 are arranged around the periphery from the bottom 4 of the main body 3 to the opening 5, and a cylindrical charging cylinder 7 is supported and attached to the blade end on the opening 5 side. It is a structure. When the rotary drum body 3 rotates forward, the fresh concrete charged from the charging cylinder 7 is stirred by the spiral blades 6, and when the rotary drum body 3 reverses, the fresh concrete in the rotary drum body 3 is stirred by the blades. 6 so that it is discharged from the opening 5.

In the rotary drum body 3 of the concrete mixer truck that mixes and discharges such ready-mixed concrete, the discharge vane 6a and the outer circumferential portion 7a of the charging cylinder 7 are removed immediately after unloading and the completion of the work, and again after the completion of the work on - day. It is necessary to wash with water and remove the fresh concrete adhering to the internal walls and blades. Conventionally, the above-mentioned washing with water is performed by pouring water into the rotating drum body 3 from the charging cylinder 7 and rotating the drum body 3 at high speed.

(Problems to be Solved by the Invention) However, with the above method, it is difficult to quickly and completely remove adherent concrete. In particular, the cleaning water does not reach the outer circumferential side of the charging cylinder 7 on the back side of the blade 6, and even when stirring fresh concrete, there is little scraping off of adhering concrete in the fresh concrete like the inside of the rotating drum body 3 and the blade 6. . Therefore, the tunnel-shaped discharge path formed as the outer peripheral part 7a of the concrete mixing cylinder 7, the discharge vane 6a on the opening side of the rotary drum body 3, and the inner peripheral wall on the opening side is narrowed, and the discharge performance of ready-mixed concrete is reduced. I will let you do it.

For this reason, hardened concrete adhering to the interior of the rotary drum and the discharge passage is periodically peeled off using a concrete drill, etc., but this work not only requires time and effort, but also removes the hardened concrete that adheres to the inside of the rotary drum and the discharge passageway. There is a risk of damaging it.

To improve this, for example, a cleaning hole 8 is provided along the outer circumference of the charging cylinder 7 in the discharge vane 6a located on the opening side of the rotating drum body 3, and a cleaning tool is inserted through this cleaning hole. There is a structure for removing concrete that has adhered to the concrete.

However, even with this improved structure, it is difficult to completely remove the adhering concrete, and the labor and labor involved in doing so is as laborious as before.

An object of the present invention is to provide a concrete sticking prevention device that can prevent fresh concrete from sticking to the outer periphery of a charging cylinder and discharge vanes on the opening side of a rotary drum body and easily clean it. There are many things.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a rotating drum of a concrete mixer truck with a T-shaped spiral along the outer periphery of the charging cylinder between the blade attachment positions. A strip rail is provided, and a support part that is slidably suspended by the rotation of the rotating drum body is provided on the rail, and with this support part as a fulcrum, a weight member is attached on one side, and an arm extending from the weight member is placed on the other side. It is characterized by having a concrete removal mechanism in which a wiper part attached to the concrete removal mechanism is swingably provided.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 3.

1 and 2, the discharge side vane 6a located on the opening 5 side of the rotary drum body 3 shown in FIGS. 6 and 7 described above is connected to the inner surface 3a of the rotary drum body 3 and the charging cylinder 7. It is attached to the portion 7b of the outer circumferential surface 7 of the bow indicated by the chain double-dashed line, and is attached to the other portions 6 of the blade 6 other than the discharge side blade 6a.
b is the charge cylinder 11 from which the steel blades 6 fixed to the inner surface of the rotating drum main body 3 by means such as welding have been removed.
FIG.

For mounting the blades on the outer circumferential surface 7a of the charging cylinder 7, an 'r-shaped threaded rail 1° is formed between positions 7b. A support member 11 is slidably suspended on this threaded rail 10, and a concrete removal mechanism 13 is attached to this support member 11 via a support shaft 12 so as to be swingable like a seesaw. There is. The concrete removal mechanism 13 includes a weight member 1 extending to one side around a support shaft 12.
3a, and a wiper portion 13c attached to a plurality of arm portions 13b extending toward the other side with the support shaft 12 as the center.

Further, a hard rubber 14 is attached to the tip of the wiper portion 13c. Also, the starting end and the ending end l of the threaded rail 10
This is a stopper 15 for preventing the support member 11 from being pulled out.
16 are provided.

Next, the effect will be explained. As shown in FIGS. 1 and 2, when the concrete removal mechanism 13 is located below the charging cylinder 7, the weight member 13a
Due to the weight of the concrete removal mechanism 13, the support shaft 12
A force that rotates clockwise in FIG. 2 about the center acts, and the hard rubber material 14 is brought into pressure contact with the outer circumferential surface 7al of the charging cylinder 7.

Now, when the rotating drum main body 2, that is, the charging cylinder 7 is reversed in the direction of arrow A from the state shown in FIGS. 1 and 2, the support member 11 comes into contact with the stopper 15,
At the same time, the support member 11 is also rotated. When the support member 11 is positioned above the charging cylinder 7, the weight of the weight member 13 causes the concrete removal mechanism 13 to rotate counterclockwise around the support shaft 12, and the hard rubber material 14 It is separated from the outer peripheral surface of the charging cylinder 7. When the charging cylinder 7 further rotates, the support member 12 separates from the stopper 15 and slides on the threaded rail 10 and falls, and the charging cylinder 7
below - located. Then, the weight member 13a again
The concrete removing mechanism 13 rotates 1 clockwise about the support shaft 12 due to the weight of the concrete removing mechanism 13, and the hard rubber material 14 comes into pressure contact with the charging cylinder 7. And stopper 1
The hard rubber material 14 remains in pressure contact with the charging cylinder 7 until the charging cylinder 5 rotates from the upper position to the lower position and comes into contact with the supporting member 111, and the concrete adhering to the outer peripheral surface of the charging cylinder 7 is removed. do. When the stopper 15 comes into contact with the support member 11, the series of operations described above are repeated again.

When the rotating drum main body 2, that is, the charging cylinder 7 is rotated forward in the direction of arrow B from the state shown in FIGS. The rubber material 14 is brought into pressure contact with the charging cylinder 7 to remove comfleet adhered to the outer peripheral surface of the charging cylinder 7. The support member 11 is the stopper 16
When it comes into contact with the support member 11 and the stopper 15 described above,
The same operation as in relation to is repeated with the stopper 16 partially acid.

In this way, when the charging cylinder 7 is rotated forward and backward, concrete adhering to the outer peripheral surface 7a of the charging cylinder 7 can be removed by the hard rubber material 14. Furthermore, when the support member 12 comes into contact with the stoppers 15 and 16, the concrete removal mechanism 1 performs a see-saw movement around the support shaft 12.
Even if concrete adheres to the support shaft 12 portion, the concrete will not harden. Further, concrete adhering to the support member 11 and the concrete removal mechanism 13 can be easily cleaned from the outside with a brush or the like by positioning the support member 11 at the starting point of the stopper 15. Furthermore, since the hard rubber material 14 is attached to the wiper portion 13c as in this embodiment, even if the hard rubber material 14 wears out, it is only necessary to replace the hard rubber material 14.

FIG. 4 shows another embodiment of the invention. In this embodiment, a weight member 13a is provided on both sides of the support member 11, an arm portion 13b connected to the weight member 13a, and a wiper portion 13.
C are arranged in parallel. Even with this configuration, the same effects as in the embodiment described above can be obtained.

FIG. 5 shows yet another embodiment of the invention. In this example,
Two concrete removal mechanisms 13, 13' shown in FIG. 3 are alternately arranged on the support member 12. As is clear from the above description, this also provides the same effect as the embodiment described above.According to the present invention, concrete adhering to the charging cylinder is automatically removed by the rotation of the rotating drum body, making cleaning easier. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of essential parts showing one embodiment of the concrete adhesion prevention device according to the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a side view of Fig. 1.
The figures are a perspective view of the concrete removal mechanism shown in Fig. 1, Fig. 4 is a perspective view showing another embodiment of the present invention, Fig. 5 is a plan view showing still another embodiment of the invention, and Fig. 6 is a perspective view of the concrete removal mechanism shown in Fig. 1. A side view of a conventional concrete mixer truck, Figure 7 is taken from arrow C in Figure 6.
FIG. 3 is a sectional view of a main part. 3...Rotating drum body, 6...Blade, 6a.
...Discharge side vane, 7...Charging cylinder,
10... Threaded rail, 11... Support part, 12
... Support shaft, 13 ... Concrete removal mechanism, 13a, 13 a' ... Weight member, 13b
, 13b'...arm part, 13c, 13C'...
Wiper part. Figure 3 Figure 4 Figure 5 Figure 7゜Figure 6

Claims (1)

[Claims] In the rotating drum of a concrete mixer truck that supports a charging cylinder, blades are arranged in a spiral pattern on the inner periphery of the main body of the rotating drum from the bottom of the main body to the opening, and the blade end on the opening side is provided with a charging cylinder. A threaded rail is disposed between the blade mounting positions on the outer periphery of the charging cylinder, and a support part that is slidably suspended by the rotation of the rotating drum is provided on the rail. Prevention of concrete sticking in a rotating drum of a concrete mixer truck, characterized in that a concrete removing mechanism is provided with a weight member on one side and a wiper part attached to an arm extending from the weight member on the other side in a swingable manner. Device.