JPS59173122A - Stirrer - Google Patents

Abstract

PURPOSE:To realize mass production and reduction of labor by forming three- dimensionally an impeller by subjecting a flat plate to a press working. CONSTITUTION:A stirrer 3 consists of a shaft 1 driven and rotated in one direction, a nut 2 screwed tightly against a male screw 8 at the end of the shaft in the counter direction to the rotation direction of the shaft, and an impeller 3 clamped by the nut 2 and a shaft side fixing material 9. The impeller is formed by press working of a flat plate and a clamping part 10 clamped by the nut 2 and the material 9, nut-fitting parts 4a-6a for fitting the nut by bending downwards at said part 10 and plural pitched blades extended outward from the nut- fitting part are provided. Thus man-hour is reduced remarkably, and said stirrer can be manufactured in a short time to realize mass production and labor reduction. The nut is always screwed tightly during stirring. In case it is loosened, it is screwed automatically by the rotation of the shaft, and accidents do not occur.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stirrer in which a stirring blade is attached to the tip of a shaft that is driven and rotated in one direction, and particularly relates to a technology for improving the stirring blade and its mounting structure.

Conventionally, as shown in FIG. 4, the stirring blades of this type of stirrer are made by drilling a shaft insertion hole d in the center of a cut-out round bar to form a post a, and a tapped hole C for a shaft fixing bolt. while forming a plurality of blade bodies b... formed by pressing a flat plate to the boss a,
In addition, the welded portion is subjected to polishing treatment and puff finishing treatment.

Therefore, ■ In order to increase the welding strength and emphasize safety, it is necessary to make the blade body a thick plate, and the momentum stirring blade is heavy, so it is necessary to balance the weight. A powerful press machine is required for thick plates, and equipment costs are high.
As a result, costs will increase.

■ Many different types of processing are required, such as cutting out the boss body, drilling C + D6 holes, punching, welding, polishing, puff finishing, and balance and sieve, which also increases costs. Accompany.

In addition, if the shaft fixing boss becomes loose, the stirring blade will fall off the shaft, and since it has rotational inertia, this will lead to an extremely dangerous situation.

There were drawbacks such as.

The present invention has been made in view of the above circumstances, and aims to provide a new and useful stirrer that can eliminate all of the above-mentioned drawbacks while being an extremely simple improvement.

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

FIG. 1 shows a perspective view of the tip of the stirrer. In the figure, 1 is a shaft that is driven and rotated in one direction by being interlocked with a motor (not shown), and 2 is a shaft that is connected to the male screw part 8 on the tip side of the shaft. ) 1 is a nut that is screwed together in a direction opposite to the drive rotation direction, and 3 is a stirring blade.

The agitating blade 3 is formed by a second pressing process of a flat plate.
A material that is punched into the shape shown in the figure and then subjected to secondary press processing to form a three-dimensional shape as shown in FIG. 3 (A) 1 CB) is used. That is, the stirring blade 3 has a clamping portion 10. which is clamped by the nut 2 and a shaft side fixing member which will be described later. Nut fitting parts 4a, 5a, 6a bent downward from the clamping part 10 and fitting the nut 2 thereto;
1. The nut fitting portions 4a, 5a.

It consists of three inclined blade bodies 4, 5, 6 extending outward from 6a.

Since the fitting portions 4a, 5a, and 6a are in contact with the outer surface of the nut 2, it is desirable to make the contact area as large as possible in order to make independent rotation of the nut impossible. Therefore, when punching a flat plate, 4a, 5a,
It is preferable to provide a bending allowance with a sufficient area as shown in 5a. Moreover, these fitting parts 4a, 5a, 5
A must have a required number of surfaces at each predetermined angle so as to completely restrict the independent rotation of the nut. In this embodiment, a hexagonal nut 2 is used, and since there are three wing bodies, the number of faces of the fitting part is three, and each face is arranged at an angle of 120°. . Nando's shape
If the number of blade bodies is other than this embodiment, the number of faces and arrangement angle of the fitting portion may be appropriately determined so as to make independent rotation of the nut impossible.

In the stirring blade 3 having the above structure, the shaft 1 is inserted into the shaft insertion hole 7 at the center, and the nut 2 is fitted into the nut fitting portions 4a+5a, 5a, and then the nut 2 is inserted into the male screw portion 8 at the tip of the shaft 1. By screwing into the nut 2, the shaft side fixing member 9 is clamped between the nut 2 and the shaft side fixing member 9. 11 is a washer. The shaft-side fixing member 9 may be formed by forming a flange surface on the shaft itself to prevent the stirring blade 3 from moving in the axial direction, but in this embodiment, a female thread is used.

By the way, the nut 2 is screwed into the male screw part at the tip of the shaft in a direction opposite to the drive rotation direction of the shaft, and is fitted into the nut fitting part of the stirring blade 3. It is designed to rotate together with the stirring blade 3,
While the stirrer is in use, it is inevitable for the nut 2 to loosen. In addition, even if the nut loosens due to a force in the opposite direction when stirring is stopped, it will be automatically tightened when stirring is started again, and the empty 1!1 cylinder of the stirring blade 3 will be tightened. , and perform the required stirring action.

Therefore, there is no accident such as the nut or stirring blade accidentally coming off the shaft.

As explained above, the stirrer according to the present invention has a shaft that is driven and rotated in one direction, and a male screw portion at the tip of the shaft is screwed in a direction opposite to the driving rotation direction of the shaft. Consisting of a nut and a stirring blade, the stirring blade is three-dimensionally formed by pressing a flat plate, and a nut fitting part is formed to restrict independent rotation of the nut during the pressing process. Since the nut is clamped between the nut and the shaft-side fixing member when the nut is fitted into the fitting part, it has the following effects. Since it is formed three-dimensionally by
Stirring blades can be manufactured using only one press operation. Therefore, like conventional stirring blades, welding, puff finishing,
Work such as thread cutting using tags (i=cutting) is no longer necessary, the number of processing steps is extremely small, manufacturing can be done in a short time, and mass production and labor savings can be achieved. Although the mold itself is expensive, since the stirring blades themselves require mass production, the manufacturing cost is also lower than that of conventional ones.

■ The nuts are tightly screwed together in the opposite direction to the drive rotation direction of the shaft, and are prevented from rotating independently due to the fitting part of the stirring blade, so the supply is constantly increased during stirring.
Even if it becomes loose, it will automatically tighten as the shaft rotates, so there will never be an accident where it comes off the shaft.

[Brief explanation of drawings]

Figure 1 is an overall perspective view showing one embodiment of the present invention, Figure 2 is a diagram showing the original shape of a stirring blade punched from a flat plate, and Figure 3 (A).
is a front view of the stirring blade, and (B) is a side view of the stirring blade. Still, FIG. 4 is a diagram showing a conventional stirring blade. l...shaft, 2...nut, 3...stirring blade,
4゜5.6... Inclined wing body, 4a T 5a l 6a
...Nut fitting part, 8...Male thread part, 9...Shaft side fixing member, lO...Pinching part. Figure 1 Figure 2 Figure 3 (A) Figure 3 (B)

Claims (1)

[Claims] A shaft that is driven and rotated in one direction, a nut that is screwed into the male screw portion on the tip end side of the shaft in a direction opposite to the driving rotation direction of the shaft, and the nut and the shaft side fixing member. the stirring blade is formed by pressing a flat plate, and a clamping part clamped by the nut and the shaft-side fixing member; A stirrer comprising: a nut fitting portion that bends to fit the nut; and a plurality of inclined blade bodies extending outward from the nut fitting portion.