Agitator and agitator cover

Abstract

To provide a stirring machine which inhibits scattering of a fluid such as a liquid or a powder.SOLUTION: A stirring machine 1 includes: a stirring bar 10 which rotates and thereby stirs an object; a rotary shaft 20 in which the stirring bar 10 is coupled at its tip; a cylindrical cover 30 covering the rotary shaft 20; a housing 40 which houses driving means for rotationally driving the rotary shaft 20 therein; a holding part 50 which is coupled to the housing 40 and gripped by a worker; and a connecting body 60 which connects the cover 30 with the housing 40.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a stirrer for stirring flowing substances such as liquids and powders, and cover body for agitator and particularly to a stirrer for stirring building materials such as wall materials. and cover body for agitator It relates to.

Background Art

[0002] Conventionally, a portable stirrer that is held by an operator for stirring a flowing substance obtained by mixing powders and granules in a liquid, such as a wall material, is known (see Patent Document 1). When stirring a wall material using the stirrer described in Patent Document 1, generally, the following procedure is followed. First, the wall material to be stirred is placed in a container such as a can. Then, the operator holds the stirrer and rotates the blades at the tip of the stirrer while immersing them in the wall material, thereby stirring the wall material.

[0003] The blades are attached to the tip of the rotating shaft. When the blades are immersed in the wall material, the wall material also adheres to the rotating shaft. When the rotating shaft is rotated with the wall material attached thereto, the wall material scatters around due to centrifugal force. Therefore, cleaning is required, and loss of the wall material is also caused. Thus, there has been a demand for a stirrer in which the flowing substance to be stirred does not scatter even when rotated.

Prior Art Documents

Patent Documents

[0004]

Patent Document 一

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of the above problems, an object of the present invention is to provide a stirrer in which scattering of a flowing substance such as a liquid or powder is suppressed. and cover body for agitator It is an object.

Means for Solving the Problems

[0006] The stirrer cover according to the present invention is attached to a stirrer having a stirring bar that stirs an object by rotating, a rotating shaft to which the stirring bar is coupled at its tip, a housing that houses a driving means for rotating the rotating shaft, and a gripping part that is coupled to the housing and held by an operator, and comprises a cylindrical cover that covers the rotating shaft and a connecting body that connects the cover and the housing. The gripping portion has a gripping rod that is formed in a rod shape and has a male threaded portion at its end, and the connecting body has a contact portion that comes into close contact with a reference surface provided on the housing, and a hole is provided in the contact portion, and the male threaded portion of the gripping rod passes through the hole in the connecting body and is screwed to a female threaded portion provided on the reference surface of the housing It is characterized by the following:

[0007] According to this invention, adhesion of the fluid to be stirred to the rotating shaft and scattering from the rotating shaft are suppressed. A cover body for a stirrer that can be easily connected to the housing to cover the rotating shaft. We can provide this.

[0012] Furthermore, other inventions according to the present invention The cover body for the agitator has the connecting body fixedly connected to the cover at one end, and the contact portion is provided at the other end of the connecting body. It is characterized by the following:

[0013] According to this invention, the cover can be separated from the axis of rotation by separating the other end of the connecting body. Cover for agitator We can provide this.

[0014] Furthermore, other inventions according to the present invention The cover body for the agitator has a stirring bar that has a hub connected to the rotating shaft and blades extending outward from the hub, and the outer diameter of the hub is larger than the inner diameter of the cover. It is characterized by the following:

[0015] According to this invention, the intrusion of fluids between the rotating shaft and the cover is suppressed. Cover for agitator We can provide this.

[0016] Furthermore, the agitator according to the present invention comprises a stirring bar that agitates an object by rotating, a rotating shaft to which the stirring bar is coupled at its tip, a cylindrical cover that covers the rotating shaft, a housing that houses a driving means for rotating the rotating shaft, a gripping part coupled to the housing for gripping by an operator, and a connecting body that connects the cover and the housing. The gripping portion has a gripping rod that is formed in a rod shape and has a male threaded portion at its end, and the connecting body has a contact portion that comes into close contact with a reference surface provided on the housing, and a hole is provided in the contact portion, and the male threaded portion of the gripping rod passes through the hole in the connecting body and is screwed to a female threaded portion provided on the reference surface of the housing It is characterized by the following:

[0017] According to this invention, A stirrer that suppresses adhesion of the fluid to be stirred to the rotating shaft and scattering from the rotating shaft, and in which a cover that covers the rotating shaft can be easily attached to the housing. We can provide this. [Effects of the Invention]

[0018] According to the present invention, a stirrer is provided that suppresses the adhesion of a flowing material to be stirred to a rotating shaft and the scattering from the rotating shaft. and cover body for agitator This can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] [Figure 1] FIG. 1 is a perspective view showing a stirrer according to an embodiment of the present invention. [Figure 2] FIG. 2 is a view showing a stirrer according to an embodiment of the present invention, (a) is a front partial cross-sectional view showing a part in a cross-sectional view, and (b) is a right side view. [Figure 3] FIG. 3 is an enlarged exploded partial cross-sectional view showing an exploded state at part A in FIG. 2(a). [Figure 4] FIG. 4 is an enlarged partial cross-sectional view showing an enlarged part B in FIG. 2(a). [Figure 5] FIG. 5 is a perspective view showing a modified example of the stirrer according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] Next, embodiments of a stirrer to which the present invention is applied will be described with reference to the drawings. The following described embodiments are preferred embodiments of the present invention, and thus various technically preferable limitations are imposed. However, the scope of the present invention is not limited to these aspects unless there is a particular description to limit the present invention in the following description.

[0021] 〔Embodiment〕 A stirrer according to an embodiment of the present invention will be described based on FIGS. 1 to 4. FIG. 1 is a perspective view showing a stirrer according to an embodiment of the present invention. FIG. 2 is a view showing a stirrer according to an embodiment of the present invention, (a) is a front partial cross-sectional view showing a part in a cross-sectional view, and (b) is a right side view. FIG. 3 is an enlarged exploded partial cross-sectional view showing an exploded state at part A in FIG. 2(a). FIG. 4 is an enlarged partial cross-sectional view showing an enlarged part B in FIG. 2(a).

[0022] First, the configuration of the agitator 1 according to this embodiment will be explained with reference to Figures 1 and 2. The agitator 1, as its basic components, includes a stirring element 10 that stirs the object by rotating, a rotating shaft 20 to which the stirring element 10 is connected, a cylindrical cover 30 that covers the rotating shaft 20, a housing 40 that houses a driving means (not shown) that rotates the rotating shaft 20, and a gripping part 50 connected to the housing 40 for the operator to grasp. Furthermore, it includes a connecting body 60 that connects the cover 30 and the housing 40.

[0023] The agitator 10 has a hub 11 attached to the tip of the rotating shaft 20 and blades 12 extending outward from the hub 11. The fluid is agitated as the blades 12 rotate within the fluid being agitated. The agitator 10 is configured to be detachably attached to the rotating shaft 20.

[0024] The rotating shaft 20 is formed in a long cylindrical shape and is rotationally driven by a driving means to rotate the stirring bar 10 attached to its tip. The driving means, which is housed inside the housing 40, and the rotating shaft 20 are connected by a large-diameter cylindrical rotating shaft holder 21, which drives the rotating shaft 20 to rotate.

[0025] The cover 30 is formed in a cylindrical shape and is positioned almost concentrically with the rotating shaft 20 so as to cover the rotating shaft 20 from the outside, with the outer circumference of the rotating shaft 20 being a predetermined distance from the inner surface 30a of the cover 30 (see Figure 2(a)). The upper end of the cover 30 is located slightly below the rotating shaft holder 21, and the lower end of the cover 30 is located slightly above the hub 11 of the stirring bar 10. Details of the positional relationship between the cover 30 and the stirring bar 10 will be described later. The presence of the cover 30 reduces the portion of the rotating shaft 20 that is exposed to the outside. In order to maintain the relative positional relationship with the rotating shaft 20, it is preferable that the cover 30 has sufficient rigidity, and it is preferable that it be made of metal such as steel with sufficient wall thickness. The cover 30 is not limited to a cylindrical shape, and may be formed in a tubular shape.

[0026] The housing 40 houses the drive mechanism, which consists of a motor that directly rotates the rotating shaft holder 21. The housing 40 is also fitted with a gripping section 50 for the operator to hold the agitator 1, and is equipped with a switch 71 for operating the drive mechanism and a power cable 72 for supplying power to the drive mechanism. Alternatively, a battery can be placed inside the housing 40 as the power source, in which case the power cable 72 is unnecessary.

[0027] The gripping section 50 has a rod-shaped gripping rod 51 and a handle 52. The gripping rod 51, which is generally short and cylindrical, is positioned to extend in a direction almost perpendicular to the rotation axis 20 and is screwed to the housing 40. The handle 52 is integrally attached to the housing 40 and is provided above it, and is configured to be gripped by hand. If the operator is right-handed, they can hold and support the entire agitator 1 by gripping the handle 52 with their right hand and the gripping rod 51 with their left hand. In this position, they can also operate the switch 71 with their right index finger.

[0028] The connecting body 60 is formed in a strip shape, and as shown in Figure 2, one end 60a is connected to the cover 30 and the other end 60b is connected to the housing 40. The connecting body 60 preferably has sufficient rigidity to maintain the relative positional relationship between the rotating shaft 20 and the cover 30, and is preferably made of metal such as steel. One end 60a of the connecting body 60 is fixedly connected to the cover 30, and the method of connection can be arbitrarily selected, but for example, welding, bolting, adhesive, or fastening by wrapping a band can be used.

[0029] The other end 60b of the connecting body 60 is detachably connected to the housing 40, and the method of connection will be explained with reference to Figures 2(a) and 3. As shown in Figure 3, the other end 60b of the connecting body 60 is provided with a hole 60c that penetrates in the thickness direction. The gripping rod 51 is provided with a male threaded portion 51a at its end, and a female threaded portion 40a corresponding to the male threaded portion 51a is provided perpendicular to the surface on the reference surface 40b provided on the housing 40. When screwing the gripping rod 51 to the housing 40, the male threaded portion 51a is passed through the hole 60c of the connecting body 60 and then screwed into the female threaded portion 40a of the housing 40. The gripping rod 51 is provided with an enlarged diameter portion 51b adjacent to the male threaded portion 51a, which is larger in diameter than the hole 60c, and when the gripping rod 51 is screwed to the housing 40, the enlarged diameter portion 51b presses the connecting body 60 toward the housing 40. Then, the contact portion 60d provided on the other end 60b of the connecting body 60 comes into close contact with the reference surface 40b of the housing 40. This determines the position of the connecting body 60, and consequently the position of the cover 30, which is then maintained in that position. When the gripping rod 51 is removed from the housing 40, the connecting body 60 and the cover 30 also separate from the housing 40.

[0030] Since the connecting body 60 and the cover 30 are integrally connected, when attaching or detaching the connecting body 60, with the stirring bar 10 removed from the rotating shaft 20, the connecting body 60 and the cover 30 are moved in the direction in which the rotating shaft 20 extends, so that the rotating shaft 20 passes through the cylindrical cover 30. The predetermined position of the connecting body 60 and the cover 30 is when the contact portion 60d of the connecting body 60 and the reference surface 40b of the housing 40 are in close contact. When screwing in the gripping rod 51, it is also possible to provide a rotation stopper such as a projection on the housing 40 to prevent the connecting body 60 from rotating along with the gripping rod 51. It is also possible to configure the connecting body 60 and the housing 40 to fit together at a predetermined position. Washers can also be interposed as appropriate.

[0031] Next, the positional relationship between the rotating shaft 20, the cover 30, and the agitator 10 will be explained based on Figure 4. A gap g is provided between the cover 30 that covers the rotating shaft 20 and the hub 11 of the agitator 10, which is coupled to the tip of the rotating shaft 20, along the direction in which the rotating shaft 20 extends. The hub 11 has the shape of a rotating body centered on the rotation center of the rotating shaft 20, and the outer diameter D of the hub 11 is set to be larger than the inner diameter d1 of the cylindrical cover 30. This prevents the fluid from entering the inside of the cover 30 when the agitator 10 is immersed in the fluid to be stirred. In particular, when the viscosity of the fluid is high, the intrusion into the inside of the cover 30 is effectively suppressed. Furthermore, by making the gap g sufficiently narrow, the intrusion of the fluid into the inside of the cover 30 can be further suppressed. For example, it is preferable to make the gap g smaller than the distance between the outer circumference of the rotating shaft 20 and the inner surface 30a of the cover 30 ((d1-d0) / 2, where d1 is the inner diameter of the cover 30 and d0 is the outer diameter of the rotating shaft 20). Note that the inner diameter d1 indicates the inner diameter at the lower end of the cover 30, i.e., the end closest to the hub 11. The cover 30 does not have to have a constant cross-section; its diameter can be changed along the way, or it can be formed into a frustoconical cylindrical shape.

[0032] Next, the procedure for stirring the wall material using this stirrer 1 will be explained with reference to Figure 1. First, the worker puts the wall material to be stirred into a container such as a can. Then, the worker grasps the gripping part 50 of the stirrer 1 with both hands and moves the entire stirrer 1 to immerse the stirring bar 10 in the wall material in the container. When the switch 71 is pressed, the drive mechanism inside the housing 40 is activated, and the stirring bar 10 rotates via the rotating shaft 20. This stirs the wall material in the container. When the switch 71 is released, the rotation of the stirring bar 10 stops and the stirring stops.

[0033] At this time, since the rotating shaft 20 is covered by the cover 30, the wall material hardly adheres to the rotating shaft 20. Furthermore, even if wall material adheres to the rotating shaft 20, the cover 30 protects the wall material that is thrown outward by centrifugal force. Therefore, even when the rotating shaft 20 is rotated, the wall material hardly scatters.

[0034] Furthermore, if wall material enters the interior of the cover 30, or if wall material gets trapped between the agitator 10 and the cover 30, cleaning may be necessary. When cleaning, the cover 30 must be removed. To remove the cover 30, the gripping rod 51, which is screwed to the housing 40, is removed to separate the connecting body 60 from the housing 40. In this state, the connecting body 60 and the cover 30 can be moved along the direction in which the rotating shaft 20 extends and removed. At this time, the agitator 10 should be removed from the rotating shaft 20. It is also possible to remove the rotating shaft 20 from the rotating shaft holder 21, in which case the rotating shaft 20 can be removed by pulling it out of the cover 30. After removing the cover 30, the inside of the rotating shaft 20 and the cover 30 can be cleaned.

[0035] [Variation] In the embodiment described above, the cover 30 was connected to the housing 40 via a connecting body 60, as shown in Figure 1. However, the cover can be installed in any way that allows it to cover the rotating shaft 20. Furthermore, the connecting body 60 that connects the cover 30 and the housing 40 can be any shape instead of the strip shape shown in Figure 1. For example, a conical or cylindrical shape can be used.

[0036] Furthermore, as shown in Figure 5, for the agitator 2, the cover 30 can be made to widen in diameter as it approaches the housing 40 so as to cover not only the rotating shaft 20 but also the rotating shaft holder 21, and can be installed adjacent to the housing 40. Additionally, a connecting body 60 can be provided so as to extend in a tongue shape from the edge of the cover 30, and it can be connected to the housing 40 using a gripping rod 51. It is also possible to fix the cover 30 and the tongue-shaped connecting body 60 together to form a single cover body.

[0037] In the above-described embodiment, one end 60a of the connecting body 60 was fixedly connected to the cover 30 and the other end 60b was detachably connected to the housing 40. However, it is also possible to detachably connect one end 60a to the cover 30 and fixedly connect the other end 60b to the housing 40. Of course, it is also possible to detachably connect one end 60a and the other end 60b to the cover 30 and the housing 40, respectively.

[0038] In the above-described embodiment, the positions of the connecting body 60 and the cover 30 were determined by passing the male threaded portion of the gripping rod 51 through the hole 60c of the connecting body 60. However, it is also possible to position the connecting body 60 by precisely fitting a predetermined portion of it to a predetermined position on the housing 40. [Explanation of Symbols]

[0039] 1,2 Stirrer 10 Stirrer 11 Hubs 12 feathers 20 Rotation axis 21 Rotating shaft holder 30 Cover 30a Inner surface 30b Outer surface 40 cabinets 40a Female thread section 40b Reference plane 50 Gripping part 51 Gripping rod 51a Male thread part 51b Expanded diameter part 51c Grip section 52 handle 60 Concatenation 60a One end 60b Other end 60c hole 60d Contact part 60e surface 71 switches 72 Power Cables

Claims

1. A cover for an agitator, which is attached to an agitator having an agitator that agitates an object by rotating, a rotating shaft to which the agitator is coupled at its tip, a housing that houses a driving means for rotating the rotating shaft, and a gripping part that is coupled to the housing and held by an operator, A cylindrical cover that covers the aforementioned rotating shaft, The system includes a connecting member that connects the cover and the housing, The gripping portion has a gripping rod which is formed in a rod shape and has a male screw portion at its end, The connecting body has a contact portion that closely contacts a reference surface provided on the housing, and a hole is provided in the contact portion. The male threaded portion of the gripping rod passes through the hole in the connecting body and is screwed to the female threaded portion provided on the reference surface of the housing. A cover body for a stirrer characterized by the following features.

2. The connecting body is fixedly connected to the cover at one end, The contact portion is provided at the other end of the connecting body. The cover body for a stirrer according to feature 1.

3. The stirring bar has a hub connected to the rotating shaft and blades extending outward from the hub, The outer diameter of the hub is larger than the inner diameter of the cover. The cover body for a stirrer according to claim 1 or 2.

4. A stirring bar that agitates the object by rotating, The rotating shaft to which the stirring bar is attached at its tip, A cylindrical cover that covers the aforementioned rotating shaft, A housing that houses a drive means for rotating the aforementioned rotating shaft, A gripping portion, which is connected to the housing and held by the operator, The system includes a connecting member that connects the cover and the housing, The gripping portion has a gripping rod which is formed in a rod shape and has a male screw portion at its end, The connecting body has a contact portion that closely contacts a reference surface provided on the housing, and a hole is provided in the contact portion. The male threaded portion of the gripping rod passes through the hole in the connecting body and is screwed to the female threaded portion provided on the reference surface of the housing. A stirrer characterized by the following features.

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