JP-7855835-B2 - Stirring device

JP7855835B2JP 7855835 B2JP7855835 B2JP 7855835B2JP-7855835-B2

Inventors

川西貴士
佐々木一成
大場誠道
米津佳佑
丈達康太

Assignees

株式会社大林組

Dates

Publication Date: 20260511
Application Date: 20210409

Claims (6)

A bottomed box-shaped hopper with an open top, A rotating shaft rotatably supported in the hopper, The hopper is equipped with a stirring member that is rotatably mounted integrally with the rotating shaft and capable of stirring the manufactured concrete or manufactured mortar that is introduced into the hopper. The stirring member is A first rod extending radially from a predetermined portion of the rotating shaft, It comprises a second rod member, one end of which is connected to the tip of the first rod member and the other end of which is connected to the axial end of the rotating shaft, The first rod extends linearly from the axial middle portion of the rotating shaft toward the radial direction of the rotating shaft, The second rod extends in an arc shape from the tip of the first rod toward the axial end of the rotating shaft, The first rod and the second rod define a fan-shaped or quarter-circular opening between them and the rotating shaft, in a radial view of the rotating shaft . The hopper has, in order from the top, a side wall, an inclined wall that is in the shape of an inverted truncated pyramid or an inverted truncated cone and narrows downward from the lower end of the side wall, and a discharge wall that extends downward from the lower end of the inclined wall. A stirring device characterized in that, as the rotating shaft rotates, the second rod rotates while ensuring a predetermined clearance between the rotational trajectory of the second rod and the inner circumferential surface of the inclined wall portion.
The stirring device according to claim 1, wherein the stirring member further comprises a third rod extending radially from between the first rod and the second rod of the rotating shaft.
The stirring device according to claim 2, wherein the third rod is positioned with respect to the rotation axis at a rotational phase 90 degrees different from that of the first rod and the second rod.
A motor as a power source, The stirring device according to any one of claims 1 to 3, further comprising a power transmission mechanism for transmitting the power of the motor to the rotating shaft.
The power transmission mechanism is A drive sprocket is provided on the output shaft of the motor so as to be rotatable integrally with it, A driven sprocket is provided on the aforementioned rotating shaft so as to be rotatable integrally with it, and is formed to have a larger diameter than the aforementioned drive sprocket, The stirring device according to claim 4, further comprising the drive sprocket and a chain belt wrapped around the driven sprocket.
The bottom of the hopper is provided with an outlet for discharging the material being stirred inside the hopper . The stirring device according to any one of claims 1 to 5, wherein the discharge port is provided with a lid member that can open or close the discharge port.

Description

This disclosure relates to a stirring device, and more particularly to a technology suitable for stirring various materials such as concrete, mortar, powders, and granules. In recent years, there has been an increase in renovation work on concrete structures. Such renovation projects often utilize high-strength and highly durable materials to reduce life cycle costs and improve productivity. While these materials exhibit excellent fluidity, their fluidity decreases if left undisturbed for extended periods. Therefore, in construction conditions requiring long-distance transportation or temporary storage, it is desirable to continuously mix the material until it is poured on-site. As an example of a device for stirring various materials, Patent Document 1 discloses a device equipped with an arc-shaped stirring rod on a rotating shaft supported by a hopper, which stirs and discharges powdered or granular chemical fertilizer introduced into the hopper using the stirring rod. Patent Document 2 discloses a device equipped with multiple plate-shaped stirring blades on a rotating shaft supported by a hopper, which mixes and kneads concrete introduced into the hopper using the stirring blades. Japanese Utility Model Publication No. 58-135223Japanese Patent Publication No. 2020-163274 This is a schematic diagram illustrating an example of how the stirring device according to this embodiment is used.This is a schematic plan view of the stirring device according to this embodiment, viewed from above.This is a schematic side view of the stirring device according to this embodiment, viewed from the side.This is a schematic side view of the stirring device according to this embodiment, viewed from the side.This is a schematic perspective view showing a pair of first and second main stirring members and a pair of first and second secondary stirring members provided on the rotating shaft of the stirring device according to this embodiment.This is a schematic perspective view illustrating the stirring rod of the comparative example stirring apparatus.This is a schematic perspective view showing a stirring member of a stirring device according to another embodiment.This is a schematic perspective view showing a stirring member of a stirring device according to another embodiment.This is a schematic perspective view showing a stirring member of a stirring device according to another embodiment.This is a schematic perspective view showing a stirring member of a stirring device according to another embodiment. The stirring apparatus according to this embodiment will be described below based on the attached drawings. The same reference numerals are used for identical parts, and their names and functions are the same. Therefore, detailed descriptions of them will not be repeated. [Usage Pattern] Figure 1 is a schematic diagram illustrating an example of how the stirring device 1 according to this embodiment is used. The stirring device 1 is used, for example, at a construction site where a concrete structure is being built or renovated, when transporting concrete while stirring it, or when temporarily storing concrete while stirring it. In Figure 1, the symbol P1 indicates the receiving area for receiving concrete, and the symbol P2 indicates the pouring area for placing concrete. The construction site in the illustrated example is, for example, a complex or cramped site where it is difficult to directly transport the concrete to the pouring area P2 using an agitator truck V or the like. Concrete produced at a batching plant, etc., is transported to the receiving area P1 at the construction site by an agitator truck V. At the receiving area P1, the concrete is poured from the agitator truck V into the hopper 10 of the mixing device 1. The mixing device 1, with the concrete inside, is then transported to the pouring area P2 by a crane C, forklift F, etc. at the construction site. The concrete transported to the pouring area P2 is poured by being discharged from the hopper 10 of the mixing device 1 at an appropriate timing according to the construction conditions, etc. In this embodiment, the mixing device 1 functions to continuously mix the concrete from the time it is received at the receiving location P1 until it is discharged at the placement location P2, or during the period when the concrete is temporarily stored at the site due to a problem or other issue. By continuously mixing the concrete from the time it is received until placement, it is possible to reliably prevent a decrease in fluidity, even with high-strength and high-durability concrete. Preventing a decrease in fluidity allows for effective maintenance of the concrete's filling properties, significantly reducing the risk of unfilled areas. While Figure 1 shows an example of transporting concrete to the construction site by an agitator truck V, the concrete may also be manufactured at a batching plant installed at the site and then dropped into the mixing device 1 f