JPH0655716U - Mixer car mixer drum - Google Patents

Abstract

(57) [Summary] [Purpose] Without sacrificing price, weldability, and productivity,
Provided is a mixer drum of a mixer car capable of improving abrasion resistance to ready-mixed concrete and maintaining kneading performance for a long period of time. In a mixer car in which a mixer drum 1 in which blades 2 are spirally arranged on an inner wall is rotatably mounted on a vehicle body, an inner peripheral edge 2a of at least a rear end portion of the blade 2 is on a discharge port 4 side. It is bent to.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mixer drum of a mixer car, and more particularly to a structure of blades provided in the mixer drum.

[0002]

[Prior art]

 Conventionally, as a mixer drum of a mixer car, as shown in FIG. 4, a mixer drum a is mounted on a vehicle body (not shown) so as to be rotatable in forward and reverse directions by a drive device, and a spiral blade b is provided on an inner wall of the mixer drum a. It is arranged so that the fresh concrete c is added, kneaded, and discharged by the action of the blade b accompanying the rotation of the mixer drum a.

[0003]

[Problems to be solved by the device]

 However, the conventional blade b has a problem of wear due to the fresh concrete c, and in particular, at the rear end portion b1 of the blade b, the fresh concrete c has an inner peripheral edge as shown in FIG. There is a problem that the inner peripheral edge b2 of the blade b is significantly worn because it is kneaded and discharged after overcoming b2.

Therefore, conventionally, as a means for solving this problem, a blade is made of a high-strength special material, a weather resistant material, or an abrasion resistant material. Join the round bars along the inner edge of the blade. Was provided. However, the former had a problem that the price was high and the weldability was poor, and the latter had a problem that the price was high and the productivity was poor.

[0005]

[Means for Solving the Problems]

 The mixer drum of the mixer wheel of the present invention is a mixer wheel in which blades are spirally mounted on the inner wall and is rotatably mounted on the vehicle body, and at least the inner peripheral edge of the rear end portion of the blade is removed. It was bent to the exit side.

[0006]

[Action]

 By bending the inner peripheral edge of the blade, the inner peripheral edge of the blade is hardened, and the abrasion that occurs when the raw concrete crosses this blade is suppressed to improve wear resistance.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a mixer drum of a mixer car according to the present invention.

In FIG. 1, reference numeral 1 denotes a mixer drum mounted on a vehicle body of a mixer vehicle (not shown). The mixer drum 1 is configured to be rotatable in forward and reverse directions by a drive device (not shown) provided on the vehicle body.

On the inner wall of the mixer drum 1, two blades 2 and 2 forming a double spiral structure are fixed by welding, and the action of the blades 2 and 2 accompanying the rotation of the mixer drum 1 causes the raw concrete 5 to It is designed to be charged, kneaded, and discharged.

At the rear end of the mixer drum 1, a not-shown charging section for charging the ready-mixed concrete 5 into the mixer drum 1 is formed, and at the same time, the fresh concrete 5 is charged through a not-shown hopper. A lower part of the portion is formed at a discharge port 4, and the fresh concrete is discharged from the discharge port 4 through a guide (not shown).

As shown in FIG. 2, the blade 2 is formed such that the inner peripheral edge 2 a of the rear end thereof is bent so as to be on the discharge port 4 side and along the flow of the ready-mixed concrete 5. The bending amount is set so as not to affect the kneading and discharging performance.

When the fresh concrete 5 is mixed with the mixer drum 1, the mixer drum 1 is rotated in a direction to send the fresh concrete 5 in the mixer drum 1 forward, and as a result, the mixer drum 1 is mixed with the fresh concrete 5 at the bottom. The concrete 5 is sent to the front, the fresh concrete 5 moves upward and moves backward, and by repeating this, the fresh concrete 5 is kneaded.

Further, when the ready-mixed concrete 5 is discharged by the mixer drum 1, the mixer drum 1 is rotated in a direction of sending the ready-mixed concrete 5 in the mixer drum 1 to the rear discharge port 4 side, whereby the ready-mixed concrete 5 is discharged from the discharge port 4. It is discharged sequentially.

At the time of kneading and discharging the fresh concrete 5, the fresh concrete 5 rides over the rear end portion of the blade 2, but the inner peripheral edge 2a of the rear end portion of the blade 2 is bent and processed. It is possible to improve the abrasion resistance with respect to the ready-mixed concrete 5, and it is possible to suppress the height of the blade 2 from being lowered due to the abrasion of the inner peripheral edge 2a of the blade 2, and it is possible to maintain the kneading performance for a long time. .

FIG. 3 shows another embodiment of the present invention, in which the inner peripheral edge 2a of the blade 2 is formed by bending and the intermediate portion 2b is also formed in a wavy shape.

[0017]

[Effect of device]

 As described above, according to the present invention, by bending the inner peripheral edge of at least the rear end portion of the blade, the inner peripheral edge of the blade is hardened, and the price, weldability, and productivity are improved. It is possible to improve the abrasion resistance to ready-mixed concrete without damaging it, and as a result, it is possible to prevent the height of the blade from decreasing due to abrasion of the inner peripheral edge of the blade, and maintain the kneading performance for a long time. be able to.

[Brief description of drawings]

FIG. 1 is a sectional view showing a sectional shape of a blade of a mixer drum according to the present invention.

FIG. 2 is an enlarged sectional view showing a sectional shape of a rear end portion of a blade of a mixer drum according to the present invention.

FIG. 3 is an enlarged sectional view showing another embodiment of the rear end portion of the blade of the mixer drum according to the present invention.

FIG. 4 is an enlarged sectional view showing a sectional shape of a blade of a conventional mixer drum.

FIG. 5 is an enlarged sectional view showing another embodiment of the rear end portion of the blade of the conventional mixer drum.

[Explanation of symbols]

 1 mixer drum 2 blades

Claims (1)

[Scope of utility model registration request] 1. A mixer car in which a mixer drum in which blades are spirally arranged on an inner wall is rotatably mounted on a vehicle body, wherein an inner peripheral edge of at least a rear end portion of the blade is bent toward a discharge port side. Mixer drum of a mixer car characterized by being.