Stirring machine

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 an agitator for agitating fluid materials such as liquids and powders, and more particularly to an agitator for agitating building materials such as wall materials. [Background technology]

[0002] Portable mixers that are handheld by an operator and used to mix fluids such as wall materials, which are made by mixing powder or granules with a liquid, have been known (see Patent Document 1). When mixing wall materials using the mixer described in Patent Document 1, the following procedure is generally followed. First, the wall material to be mixed is placed in a container such as a can. Then, the operator holds the mixer and rotates it with the blade at the tip of the mixer immersed in the wall material, thereby mixing the wall material.

[0003] The blades are attached to the tip of the rotating shaft, and when the blades are immersed in the wall material, the wall material also adheres to the rotating shaft. If the rotating shaft is rotated with the wall material attached, the wall material will scatter around due to centrifugal force. This requires cleaning work and causes loss of wall material. Therefore, there was a demand for an agitator that would not scatter the fluid being agitated even when rotated. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-139713 A Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above problems, an object of the present invention is to provide an agitator that suppresses scattering of fluids such as liquids and powders. [Means for solving the problem]

[0006] The mixer of the present invention is characterized in that it comprises a stirrer that rotates to stir an object, a rotating shaft to the tip of which the stirrer is attached, a cylindrical cover that covers the rotating shaft, a housing that houses inside a drive means that rotates the rotating shaft, and a gripping part that is attached to the housing and is held by an operator.

[0007] According to the present invention, it is possible to provide an agitator that suppresses adhesion of the fluid to be agitated to the rotating shaft and scattering from the rotating shaft.

[0008] Another agitator according to the present invention is characterized in that it further comprises a connector that connects the cover and the housing.

[0009] According to this invention, it is possible to provide a mixer in which the cover covering the rotating shaft can be easily connected to the housing.

[0010] Another agitator according to the present invention is characterized in that the gripping portion has a gripping rod formed in a rod shape with a male threaded portion at its end, the connecting body has an abutment portion that abuts closely against a reference surface provided on the housing, and a hole is provided in the abutment portion, and the male threaded portion of the gripping rod passes through the hole of the connecting body and is screwed into a female threaded portion provided perpendicular to the reference surface of the housing.

[0011] According to the present invention, it is possible to provide a mixer in which the cover can be easily attached to and detached from the housing by using the grip rod.

[0012] Another agitator according to the present invention is characterized in that the connecting body is formed in a band shape, one end of the connecting body is fixedly connected to the cover, and the abutment portion is provided on the other end of the connecting body.

[0013] According to this invention, it is possible to provide an agitator in which the cover can be separated from the rotating shaft by separating the other end of the connecting body.

[0014] Another stirrer according to the present invention is characterized in that the stirring element has a hub coupled 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.

[0015] According to this invention, it is possible to provide a stirrer in which the intrusion of a fluid between the rotating shaft and the cover is suppressed.

[0016] A cover body for a stirrer according to the present invention is characterized by comprising a cylindrical cover that covers the rotating shaft of the stirrer and a connecting body that connects the cover and the housing of the stirrer.

[0017] According to this invention, it is possible to provide a cover body for a stirrer that suppresses the adhesion of a fluid to be stirred to the rotating shaft and the scattering from the rotating shaft.

Effect of the Invention

[0018] According to the present invention, it is possible to provide a stirrer that suppresses the adhesion of a fluid to be stirred to the rotating shaft and the scattering from the rotating shaft.

Brief Description of the Drawings

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

Mode for Carrying Out the Invention

[0020] Next, an embodiment of a mixer to which the present invention is applied will be described with reference to the drawings. Note that the embodiment described below is a preferred embodiment of the present invention, and therefore various technically preferable limitations are attached, but the scope of the present invention is not limited to these aspects unless otherwise specified in the following description to the effect that the present invention is limited.

[0021] [Embodiment] An agitator according to an embodiment of the present invention will be described with reference to Figs. 1 to 4. Fig. 1 is a perspective view showing an agitator according to an embodiment of the present invention. Fig. 2 shows an agitator according to an embodiment of the present invention, where (a) is a partial front cross-sectional view showing a part in cross-section, 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) in an enlarged manner. Fig. 4 is an enlarged partial cross-sectional view showing part B in Fig. 2(a) in an enlarged manner.

[0022] First, the configuration of the mixer 1 according to this embodiment will be described with reference to Figures 1 and 2. The mixer 1 includes, as basic components, a stirrer 10 that rotates to stir an object, a rotating shaft 20 to the tip of which the stirrer 10 is connected, a cylindrical cover 30 that covers the rotating shaft 20, a housing 40 that houses inside a drive means (not shown) that rotates the rotating shaft 20, and a grip 50 that is connected to the housing 40 and is held by an operator. The mixer 1 further includes a connector 60 that connects the cover 30 and the housing 40.

[0023] The stirrer 10 has a hub 11 connected to the tip of a rotating shaft 20 and a blade 12 extending outward from the hub 11. The blade 12 rotates in the fluid to be stirred, thereby stirring the fluid. The stirrer 10 is configured to be detachable from the rotating shaft 20.

[0024] The rotating shaft 20 is formed in a long cylindrical shape, and is an element that is driven to rotate by a driving means to rotate the stirrer 10 connected to the tip of the rotating shaft 20. The driving means housed inside the housing 40 and the rotating shaft 20 are connected by a rotating shaft holder 21 formed in a large-diameter cylindrical shape, whereby the rotating shaft 20 is driven to rotate.

[0025] The cover 30 is formed in a cylindrical shape and is disposed substantially concentrically with the rotating shaft 20 so as to cover the rotating shaft 20 from the outside, and the outer periphery of the rotating shaft 20 is a predetermined distance away from the inner circumferential surface 30a of the cover 30 (see FIG. 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 stirrer 10. The positional relationship between the cover 30 and the stirrer 10 will be described in detail 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 is preferably made of a metal such as steel and has a sufficient thickness. The cover 30 is not limited to a cylindrical shape, and may be formed in a tubular shape.

[0026] The housing 40 contains therein a driving means, which is directly composed of a motor that rotates the rotary shaft holder 21. A grip 50 that enables an operator to grip the mixer 1 is connected to the housing 40, and a switch 71 that activates the driving means and a power cable 72 that supplies power to the driving means are also provided. Note that a battery can also be placed inside the housing 40 and used as the power source, in which case the power cable 72 will be unnecessary.

[0027] The gripping portion 50 has a rod-shaped gripping rod 51 and a handle 52. The roughly short cylindrical gripping rod 51 is disposed so as to extend in a direction nearly perpendicular to the rotating shaft 20, and is screwed to the housing 40. The handle 52 is integral with the housing 40 and provided above it, and is configured so as to be gripped by hand. If the operator is right-handed, the entire mixer 1 can be supported by gripping the handle 52 with the right hand and the gripping rod 51 with the left hand. In this state, the switch 71 can be operated with the index finger of the right hand.

[0028] The connector 60 is formed in a belt shape, and as shown in Fig. 2, one end 60a is connected to the cover 30, and the other end 60b is connected to the housing 40. The connector 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 a metal such as steel. One end 60a of the connector 60 is fixedly connected to the cover 30 by any method that can be selected, but for example, welding, bolt fastening, adhesion, fastening by wrapping a band, etc. can be used.

[0029] The other end 60b of the connector 60 is detachably connected to the housing 40, and the connection method will be described with reference to FIG. 2(a) and FIG. 3. As shown in FIG. 3, the other end 60b of the connector 60 is provided with a hole 60c penetrating in the plate thickness direction. The gripping rod 51 is provided with a male screw portion 51a at its end, and a female screw portion 40a corresponding to the male screw portion 51a is provided perpendicularly to a reference surface 40b provided on the housing 40. When screwing the gripping rod 51 to the housing 40, the male screw portion 51a is inserted through the hole 60c of the connector 60 and then screwed to the female screw portion 40a of the housing 40. The gripping rod 51 is provided with an expanded diameter portion 51b adjacent to the male screw portion 51a, which is configured to have a larger diameter than the hole 60c. When the gripping rod 51 is screwed to the housing 40, the expanded diameter portion 51b presses the connector 60 toward the housing 40. The abutment portion 60d provided on the other end portion 60b of the connector 60 comes into close contact with the reference surface 40b of the housing 40. This determines the position of the connector 60, and therefore the position of the cover 30, which are then maintained in this position. When the gripping rod 51 is removed from the housing 40, the connector 60 and the cover 30 are also separated from the housing 40.

[0030] Since the connector 60 and the cover 30 are integrally connected, when attaching and detaching the connector 60, the stirrer 10 is removed from the rotating shaft 20, and the rotating shaft 20 passes through the cylindrical cover 30, and the connector 60 and the cover 30 are moved in the direction in which the rotating shaft 20 extends. The state in which the abutment portion 60d of the connector 60 and the reference surface 40b of the housing 40 are in close contact with each other is the predetermined position of the connector 60 and the cover 30. It is also possible to provide a rotation stopper such as a protrusion on the housing 40 to prevent the connector 60 from rotating due to the gripping rod 51 when the gripping rod 51 is screwed. It is also possible to configure the connector 60 and the housing 40 to fit together at a predetermined position. It is also possible to interpose a washer as appropriate.

[0031] Next, the positional relationship between the rotating shaft 20, the cover 30, and the stirrer 10 will be described with reference to FIG. 4. Between the cover 30 covering the rotating shaft 20 and the hub 11 of the stirrer 10 connected to the tip of the rotating shaft 20, a gap g is provided along the extending direction of the rotating shaft 20. The hub 11 has a shape of a rotating body centered on the center of rotation 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 penetrating into the cover 30 when the stirrer 10 is immersed in the fluid to be stirred. In particular, when the viscosity of the fluid is high, the fluid is effectively prevented from penetrating into the cover 30. In addition, by narrowing the gap g sufficiently, the fluid can be further prevented from penetrating into the cover 30. For example, it is preferable to make the gap g smaller than the distance between the outer periphery of the rotating shaft 20 and the inner periphery 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). The inner diameter d1 indicates the inner diameter at the lower end of the cover 30, i.e., the end close to the hub 11. The cover 30 does not have to have a constant cross section, and it is also possible for the diameter to change midway or for it to be formed into a frustum-shaped cylinder.

[0032] Next, the procedure for mixing wall material using this mixer 1 will be described with reference to Fig. 1. First, the operator puts the wall material to be mixed into a container such as a can. Then, the operator holds the gripping portion 50 of the mixer 1 with both hands and moves the entire mixer 1 to immerse the stirrer 10 into the wall material in the container. When the operator presses the switch 71, the driving means in the housing 40 is activated, and the stirrer 10 rotates via the rotating shaft 20. This mixes the wall material in the container. When the operator stops pressing the switch 71, the stirrer 10 stops rotating and mixing stops.

[0033] At this time, since the rotating shaft 20 is covered with the cover 30, the wall material hardly adheres to the rotating shaft 20. Even if the wall material adheres to the rotating shaft 20, the wall material that would fly outward due to centrifugal force is guarded by the cover 30. Therefore, even if the rotating shaft 20 is rotated, almost no wall material is scattered.

[0034] Also, if the wall material gets inside the cover 30 or gets between the stirrer 10 and the cover 30, cleaning may be required. When cleaning, the cover 30 needs to be removed. To remove the cover 30, the gripping rod 51 screwed to the housing 40 is removed to make the connector 60 detachable from the housing 40, and in that state, the connector 60 and the cover 30 can be moved along the direction in which the rotating shaft 20 extends to remove them. At this time, the stirrer 10 is removed from the rotating shaft 20. It is also possible to remove the rotating shaft 20 from the rotating shaft holder 21, and in that case, the rotating shaft 20 can be removed by pulling it out from the cover 30. After removing the cover 30, the inside of the rotating shaft 20 and the cover 30 can be cleaned.

[0035] [Modifications] In the above embodiment, as shown in Fig. 1, the cover 30 is connected to the housing 40 via the connector 60, but the cover can be installed in any manner that allows it to be arranged to cover the rotating shaft 20. Furthermore, the connector 60 that connects the cover 30 to the housing 40 can have any shape instead of the band-like shape shown in Fig. 1, and for example, a conical or cylindrical shape can be used.

[0036] 5, the cover 30 may be provided adjacent to the housing 40 with a larger 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 a connector 60 may be provided so as to extend tongue-like from the edge of the cover 30 and connected to the housing 40 using a gripping rod 51. The cover 30 and the tongue-shaped connector 60 may be fixedly connected to form a single cover body.

[0037] In the above embodiment, one end 60a of the connector 60 is fixedly connected to the cover 30, and the other end 60b is detachably connected to the housing 40, but it is also possible to reverse this by detachably connecting one end 60a to the cover 30 and fixing the other end 60b to the housing 40. It is also possible, of course, to detachably connect one end 60a and the other end 60b to the cover 30 and the housing 40, respectively.

[0038] In addition, in the above-described embodiment, the positions of the connector 60 and the cover 30 were determined by passing the male threaded portion of the gripping rod 51 through the hole 60c of the connector 60, but it is also possible to position the connector 60 by fitting a predetermined part of the connector 60 to a predetermined position on the housing 40. [Explanation of symbols]

[0039] 1,2 Stirrer 10 Stirrer 11. Hub 12 Feather 20 Rotational Axis 21 Rotating shaft holder 30 Cover 30a Inner surface 30b Outer surface 40 Case 40a Female thread 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 Switch 72 Power Cable

Claims

A stirrer cover body for a stirrer, which is mounted on a stirrer having a stirrer that stirs an object by rotating, a rotating shaft to which the stirrer is coupled at its tip, a housing that houses therein a driving means for rotationally driving the rotating shaft, and a gripping portion that is coupled to the housing and is gripped by an operator, comprising: a cylindrical cover that covers the rotating shaft; and a connecting body that connects the cover and the housing. The stirrer cover body is characterized by the above. According to claim 2, the gripping portion has a gripping rod formed in a rod shape and provided with a male screw portion at its end, the connecting body has a contact portion that closely contacts and abuts against a reference surface provided on the housing, and a hole is provided in the contact portion, the male screw portion of the gripping rod passes through the hole of the connecting body and is screwed to a female screw portion provided on the reference surface of the housing. The stirrer cover body according to claim 1, characterized by the above. According to claim 3, one end of the connecting body is fixedly coupled to the cover, and the contact portion is provided at the other end of the connecting body. The stirrer cover body according to claim 2, characterized by the above. According to claim 4, the stirrer has a hub coupled to the rotating shaft and blades extending outward from the hub, and an outer diameter of the hub is larger than an inner diameter of the cover. The stirrer cover body according to any one of claims 1 to 3, characterized by the above. A stirrer, comprising a stirrer that stirs an object by rotating, a rotating shaft to which the stirrer is coupled at its tip, a cylindrical cover that covers the rotating shaft, a housing that houses therein a driving means for rotationally driving the rotating shaft, a gripping portion that is coupled to the housing and is gripped by an operator, and a connecting body that connects the cover and the housing. The stirrer is characterized by the above.

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