JP2021194576A - Agitation device, connection rod, and coupling mechanism - Google Patents

Abstract

To provide an agitation device that is advantageous in a simple structure for coupling a connection rod.SOLUTION: An agitation device 100 is equipped with a connection rod 1, a hollow shaft 4 coupled to the connection rod 1, a stopper 2 engaged with the connection rod 1, and a cap 3 screwed with the hollow shaft 4. On an outer periphery of the connection rod 1, outer surface engaging portions 1b are provided so as to define at least three corners 1c. With the respective outer surface engaging portions 1b, a plurality of engaging portions 2b of the stopper 2 are engaged. The connection rod 1 is coupled to the hollow shaft 4 through the stopper 2 by fastening the cap 3.SELECTED DRAWING: Figure 3

Description

The present invention relates to a stirrer, a connecting rod attached to the stirrer, and a connecting mechanism of the connecting rod.

In Patent Document 1, in a stirring device used by connecting a stirring rod made of resin, a U-shaped stopper abuts on a pair of grooves formed in the stirring rod to transmit a rotational force to the stirring rod. It has been disclosed.

Japanese Unexamined Patent Publication No. 2014-91101

In the stirring device disclosed in Patent Document 1, the connection strength of the resin stopper is insufficient due to changes in the material and environment and variations in the dimensions of the product. In addition, when assembling the stirring rod, the U-shaped stopper may fall off.

An object of the present invention is to provide a stirring device which is advantageous in terms of a simple configuration for connecting connecting rods.

In order to solve the above problems, the stirring device of the present invention screwed the connecting rod, the connected member connected to the connecting rod, the engaging member engaged with the connecting rod, and the connected member. A stirring device including a fastening member, the outer periphery of the connecting rod is provided with engaging surfaces so as to define at least three corners, and each of the engaging surfaces is provided with the above-mentioned engaging surface. A plurality of engaging portions of the engaging member are engaged with each other, and the connecting rod is connected to the connected member by fastening the fastening member via the engaging member.

According to the present invention, it is possible to provide an advantageous stirring device in terms of a simple configuration for connecting connecting rods.

It is a schematic diagram of the stirring apparatus 100 which concerns on Example 1. FIG. It is a schematic diagram which shows the connection state of the connection rod 1 and the hollow shaft 4 which concerns on Example 1. FIG. (A) It is sectional drawing of the connection mechanism which concerns on Example 1. FIG. (B) FIG. 3 is an enlarged cross-sectional view of the cap 3. (A) It is a top view of the stopper 2 which concerns on Example 1. FIG. (B) and (C) are the same perspective views. It is a perspective view of the cap 3 which concerns on Example 1. FIG. (A) It is sectional drawing in the vicinity of the lower end portion 4c of the hollow shaft 4 which concerns on Example 1. FIG. (B) It is the same external view. (A) It is sectional drawing of the connection mechanism which concerns on Example 2. FIG. (B) FIG. 3 is an enlarged cross-sectional view of the cap 23. (A) It is sectional drawing in the vicinity of the lower end portion 24c of the hollow shaft 24 which concerns on Example 2. FIG. (B) It is the same perspective view. (A) It is sectional drawing of the stopper 32 engaged with the connection rod 31 which concerns on modification 1. FIG. (B), (C) is a perspective view of the stopper 32. (A) It is a top view of the stopper 42 which concerns on modification 2. FIG. (B) and (C) are the same perspective views. It is a perspective view of the stopper 52 which concerns on modification 3. FIG.

Hereinafter, exemplary embodiments for carrying out the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative positions of the components, etc. described in each of the following examples and modifications are arbitrary and can be changed according to various conditions. Further, unless otherwise specified, the scope of the present invention is not limited to each embodiment and each modification specifically described below. In this specification, up and down correspond to the upward direction and the downward direction in the gravitational direction, respectively.

(Example 1)
FIG. 1 is a schematic view of the stirring device 100 according to the first embodiment, and the stirring device 100 according to the first embodiment will be described with reference to FIG. The stirring device 100 according to the first embodiment has a stirring blade 5 for stirring chemicals and the like in a stirring container 10 such as a flask, a connecting rod 1 for supporting the stirring blade 5, and a drive for rotating the connecting rod 1. A unit 9 and a controller unit 11 and the like are provided. The drive unit 9 is connected to the controller unit 11 via a cable. The controller unit 11 has a switch for starting or stopping the driving of the driving unit 9 of the stirring device 100, controls the driving unit 9, and also functions as a timer.

The drive unit 9 has a cover body made of synthetic resin or the like, and a drive motor (not shown) housed inside the cover body. Further, the drive unit 9 has a drive magnet (not shown) fixed to the lower end of the motor shaft and a rotating plate (not shown) including a driven magnet that magnetically couples with the drive magnet. The drive magnet and the rotating plate are located on the coaxial line. A partition wall 8 is arranged between the rotating plate and the driving magnet to prevent chemicals and the like from entering the motor. A joint portion 7 having a tapered shape is screwed to the lower side of the partition wall 8.

Further, the stirring device 100 further includes a hollow shaft 4 (connected member) as a rotation transmitting unit that transmits rotation from the driving unit 9 to the connecting rod 1. The hollow shaft 4 is a substantially pipe-shaped member, and the upper end portion of the hollow shaft 4 is connected to the lower end portion of the rotating plate of the drive portion 9, and is arranged in the joint portion 7. Further, the hollow shaft 4 is rotatably supported by the joint portion 7 via a bearing. Further, the connecting rod 1 is connected to the hollow shaft 4 by a cap 3 (fastening member).

When the motor is driven and the motor shaft is rotated, the rotation is transmitted to the connecting rod 1 by the hollow shaft 4 which is driven to rotate. That is, the rotating plate rotates according to the rotation of the drive magnet fixed to the motor shaft, and the hollow shaft 4 and the connecting rod 1 rotate with the rotation of the rotating plate. A stirring blade 5 having a substantially rectangular shape and a curved end face at the end is attached to the lower end of the connecting rod 1. The contents of the stirring container 10 are stirred by the rotation of the stirring blade 5 by the connecting rod 1. The stirring blade 5 may have another shape such as a half-moon shape or a fan shape.

The lower portion 7a of the joint portion 7 has a tapered shape, an annular groove 7b is formed in the lower portion 7a, and an O-ring is attached to the annular groove 7b. Then, when the lower portion 7a is inserted into the opening portion 10a of the stirring container 10, the lower portion 7a of the joint portion 7 and the inner surface of the opening portion 10a can be hermetically sealed by the O-ring. A detachable ring 6 is arranged between the joint portion 7 and the stirring container 10, and by rotating the detachable ring 6 screwed to the joint portion 7, the stirring container 10 and the joint portion 7 can be easily separated. ..

The connecting rod 1 is made of a resin material having chemical resistance such as PTFE and PEEK resin, but can also be made of glass. Further, the stirring blade 5 and the cap 3 are also formed of a resin material having chemical resistance such as PTFE and PEEK resin. The hollow shaft 4 is made of a material such as stainless steel or fluororesin. Further, the hollow shaft 4 can also be formed by providing a layer of PTFE resin on the outside of a substrate made of a stainless steel material.

Next, with reference to FIGS. 2 to 6 (A) and 6 (B), the components constituting the connecting mechanism according to the first embodiment will be described. FIG. 2 is a schematic view showing a connected state of the connecting rod 1 and the hollow shaft 4 according to the first embodiment. FIG. 3A is a cross-sectional view of the connecting mechanism of the connecting rod 1 and the hollow shaft 4 according to the first embodiment, and FIG. 3B is an enlarged cross-sectional view of the cap 3. 4 (A) is a plan view of the stopper 2 (engagement member) according to the first embodiment, and FIGS. 4 (B) and 4 (C) are perspective views of the stopper 2. FIG. 5 is a perspective view of the cap 3 according to the first embodiment. FIG. 6A is a cross-sectional view of the vicinity of the lower end portion 4c of the hollow shaft 4 according to the first embodiment, and FIG. 6B is an external view of the same.

First, the connection rod 1 according to the first embodiment will be described with reference to FIGS. 2 to 4 (A) to 4 (C). A plurality of outer surface engaging portions 1b (engaging surfaces) for suppressing idling of the connecting rod 1 are provided on the outer surface of the connecting rod 1. The outer surface engaging portion 1b is provided so as to define six rounded corners 1c around the outer circumference of the connecting rod 1, that is, the outer surface engaging portion 1b is provided in the circumferential direction of the outer surface of the connecting rod 1. It is formed in 6 places intermittently. Then, the engaging portion 2b of the stopper 2 is engaged with the outer surface engaging portion 1b, and the connecting rod 1 and the stopper 2 can be engaged by this engagement. As described above, the outer surface engaging portion 1b is provided so as to define six rounded corners 1c around the outer circumference of the connecting rod 1, but the outer surface engaging portion 1b has at least five corners 1c. Should be formed. Then, by fastening the cap 3 to the hollow shaft 4, the connecting rod 1 is connected to the hollow shaft 4 via the stopper 2. Further, a stirring blade 5 is swingably attached to the connecting rod 1 (stirring rod), and the stirring blade 5 is configured to swing upward and open when the connecting rod 1 rotates. Note that FIG. 2 shows a state in which the stirring blade 5 is closed, and FIG. 1 shows a state in which the stirring blade 5 is open.

The connecting rod 1 is formed of a resin material as described above, but in order to secure strength, the connecting rod 1 has a core member 1a formed of a metal material such as a stainless steel material and PTFE, as shown in FIG. 3 (B). It is composed of an outer layer 1d formed of a resin material such as PEEK resin. The outer diameter of the connecting rod 1 is about 8 mm, the core member 1a has a diameter of 5 mm, and the thickness of the outer layer 1d is about 1.5 mm. The thickness of the outer layer 1d covering the core member 1a is even thinner than 1.5 mm.

Next, the stopper 2 according to the first embodiment will be described. As shown in FIGS. 4A to 4C, the outer surface shape of the stopper 2 is a substantially hexagonal shape (substantially C-shaped) in which one corner 2c is missing and five corners 2c are provided. Six engaging portions 2b are formed on the inner surface of the stopper 2, and each of the six engaging portions 2b engages with each of the outer surface engaging portions 1b of the connecting rod 1. Further, as shown in FIG. 3B, the cross section of the connecting rod 1 in the outer surface engaging portion 1b has a substantially hexagonal shape so as to correspond to the substantially C-shaped shape of the stopper 2, and the outer surface has a substantially hexagonal shape. The engaging portion 1b is a flat flat surface.

Next, the cap 3 according to the first embodiment will be described. As shown in FIG. 5, the cap 3 has a substantially hexagonal nut shape, and the inner peripheral surface of the cap 3 has a fitting portion 3a (inner peripheral surface) into which the outer peripheral surface 2a of the stopper 2 is fitted. A female screw-shaped thread groove 3b is formed. Further, an extension portion 3d is formed on the inner diameter side in the radial direction from the fitting portion 3a, and a hole portion 3c into which the connection rod 1 can be inserted is formed substantially in the center of the extension portion 3d. In the first embodiment, the fitting portion 3a of the cap 3 has a hexagonal shape, and the inner surface shape of the fitting portion 3a is complementary to the outer surface shape of the stopper 2. Then, the outer peripheral surface 2a of the stopper 2 comes into contact with the fitting portion 3a, and the stopper 2 fits into the cap 3.

Such a connecting rod 1, a stopper 2, and a cap 3 can be formed, for example, by molding a material made of a resin material and then cutting the material. That is, the outer surface engaging portion 1b of the connecting rod 1, the C-shaped shape of the stopper 2, the fitting portion 3a of the cap 3, the hole portion 3c, and the like are all formed by cutting. When the connecting rod 1 is made of glass, the outer surface engaging portion 1b of the connecting rod 1 can be formed by using a mold having a protrusion at a position corresponding to the outer surface engaging portion 1b.

Next, the hollow shaft 4 according to the first embodiment will be described. The hollow shaft 4 is a substantially pipe-shaped member as shown in FIGS. 6A and 6B. A male screw-shaped thread groove 4b into which the thread groove 3b of the cap 3 is screwed is formed on the outer surface of the hollow shaft 4 on the lower end 4c side, and the inner peripheral surface on the lower end 4c side is formed on the inner peripheral surface of the hollow shaft 4. A tapered surface 4a that is inclined outward is formed.

Next, a method of attaching the connecting rod 1 to the hollow shaft 4 will be described. In the following, it is assumed that the stirring blade 5 is attached to the connecting rod 1 in advance. First, the end of the connecting rod 1 on the side to which the stirring blade 5 is not attached is inserted into the hole 3c of the cap 3 and the cap 3 is held so as to be located in the vicinity of the stirring blade 5. Then, the engaging portion 2b of the stopper 2 is engaged with the outer surface engaging portion 1b of the connecting rod 1, but since the stopper 2 has flexibility, the connecting rod 1 is attached so as to be sandwiched between the stopper 2. As a result, the outer surface engaging portion 1b and the engaging portion 2b are engaged with each other.

After that, the cap 3 is moved upward or the connecting rod 1 is moved downward, the outer peripheral surface 2a of the stopper 2 is fitted to the fitting portion 3a of the cap 3, and the connecting rod 1, the stopper 2 and the cap 3 are integrated. Next, the end of the connecting rod 1 integrated with the cap 3 and the stopper 2 is inserted into the hollow shaft 4 from the lower end 4c of the hollow shaft 4, and the thread groove 3b of the cap 3 is inserted into the thread of the hollow shaft 4. It is brought into contact with the groove 4b. In this state, the cap 3 is rotated in the tightening direction, and the thread groove 3b of the cap 3 is screwed into the thread groove 4b of the hollow shaft 4. When the cap 3 is further tightened and the fastening is completed, the connecting rod 1 is fixed to the hollow shaft 4. In this way, the connecting rod 1 can be easily attached to the hollow shaft 4.

According to the connecting mechanism according to the first embodiment described above, the engaging portion 2b of the stopper 2 engages with the outer surface engaging portion 1b of the connecting rod 1, and the outer peripheral surface 2a of the stopper 2 is fitted with the cap 3. It is fitted to the portion 3a. Therefore, when the connecting rod 1 is attached to the hollow shaft 4 by the cap 3, the rotation of the connecting rod 1 with respect to the hollow shaft 4 is restricted by the stopper 2, so that the idling of the connecting rod 1 can be suppressed. Further, in a state where the cap 3 is screwed into the thread groove 4b of the hollow shaft 4, the upper end portion of the stopper 2 comes into contact with the lower end portion 4c of the hollow shaft 4 (see FIG. 3A), so that the connecting rod 1 Upward movement is restricted. In addition, the lower end of the stopper 2 comes into contact with the extending portion 3d of the cap 3, which restricts the downward movement of the connecting rod 1.

As shown in FIG. 3A, a plurality of outer surface engaging portions 1b are formed on the connecting rod 1 along the longitudinal direction of the connecting rod 1. Therefore, the length of the connecting rod 1 after mounting can be easily adjusted by changing the position in which the stopper 2 is engaged in the vertical direction. That is, the attachment position of the connecting rod 1 with respect to the hollow shaft 4 can be adjusted according to the amount of the contents in the stirring container 10, the size of the stirring container 10, and the like.

Further, the plurality of outer surface engaging portions 1b are provided at equal intervals along the longitudinal direction of the connecting rod 1. Therefore, the length of the connecting rod 1 after mounting can be easily grasped by counting the number of visible outer surface engaging portions 1b. For example, when the number of the outer surface engaging portions 1b that can be visually recognized at the time of stirring is two, the number of the outer surface engaging portions 1b that can be visually recognized is two even when the same amount of chemicals or the like is agitated next time. The connection rod 1 may be attached to.

According to the connection mechanism according to the first embodiment described above, the corners 1c having at least five roundnesses are defined around the outer circumference of the connection rod 1, and the stress in the connection can be dispersed as compared with the conventional example. Therefore, it is possible to suppress the idling of the connecting rod 1. That is, the six surfaces of the engaging portion 2b of the stopper 2 and the six surfaces of the outer surface engaging portion 1b of the connecting rod 1 are in contact with each other. Therefore, the contact area in the contact area between the two members is large, and the stress can be dispersed. With this configuration, even when the engaging portion 2b and the outer surface engaging portion 1b are formed of a material such as PTTE having a relatively low strength, damage can be prevented. Then, the stopper 2 that engages with the outer surface engaging portion 1b of the connecting rod 1 is also fitted to the fitting portion 3a of the cap 3. Therefore, it is possible to prevent the connecting rod 1 from idling with respect to the hollow shaft 4. In particular, when the connecting rod 1 is made of a material having chemical resistance such as PTFE and PEEK resin, the connecting rod 1 is easily deformed and slippery, but even in such a case, the member can idle. Can be suppressed. Further, the thickness of the outer layer 1d of the connecting rod 1 at the portion where the outer surface engaging portion 1b is formed is about 1 mm in terms of the dimensions of the product, so that the strength is low, but according to the connecting mechanism according to the first embodiment. , Sufficient connection strength can be secured.

Further, in the connecting mechanism according to the first embodiment, since the stopper 2 is smaller than the connecting rod 1, the size of the engaging portion between the stopper 2 and the connecting rod 1 can be kept small. In particular, the size of the engaging portion can be kept small as compared with the case where another member such as a screw is provided on the outside of the connecting rod 1 in order to suppress idling. Therefore, when the stirring device 100 is attached to the stirring container 10, the engaging portion does not interfere with the attachment. Further, since the stopper 2 is housed in the fitting portion 3a of the cap 3, it is possible to prevent the stopper 2 from falling off. By controlling the drive unit 9 so that the rotation direction of the connecting rod 1 coincides with the tightening direction of the cap 3, the cap 3 is tightened more firmly by the rotation of the connecting rod 1. This makes it possible to more reliably prevent the cap 3 and the stopper 2 from falling off.

Further, in the connecting mechanism according to the first embodiment, the stopper 2 is only engaged with the connecting rod 1 and fitted with the cap 3. Therefore, a complicated mounting process is not required, and mounting can be easily performed. Then, since the connection rod 1, the stopper 2 and the cap 3 according to the first embodiment can be replaced and attached to the existing device, the configuration of the existing device can be used. The stopper 2 according to the first embodiment has a substantially hexagonal shape (substantially C-shaped) having one corner 2c missing and five corners 2c, but one corner 2c is missing and four. It may have a substantially pentagonal shape with two corners 2c. The corresponding connecting rod 1 may be formed with an outer surface engaging portion 1b so as to define at least four corners 1c, and the cross section of the connecting rod 1 in this form has a pentagonal shape.

(Example 2)
Next, with reference to FIGS. 7 (A) and 7 (B) and FIGS. 8 (A) and 8 (B), the components constituting the connecting mechanism according to the second embodiment will be described. FIG. 7A is a cross-sectional view of the connecting mechanism of the connecting rod 1 and the hollow shaft 24 according to the second embodiment, and FIG. 7B is an enlarged cross-sectional view of the cap 23. FIG. 8A is a cross-sectional view of the vicinity of the lower end portion 24c of the hollow shaft 24 of the second embodiment, and FIG. 8B is a perspective view of the same. In the description of the second embodiment, the differences from the first embodiment will be described, and the same reference numbers will be given to the same components as those of the first embodiment, and the description thereof will be omitted. Unless otherwise specified, the components with the same reference number perform substantially the same operation and function, and their effects are almost the same.

First, the connection mechanism according to the second embodiment will be described. In the connecting mechanism according to the second embodiment, the shapes of the connecting rod 1 and the stopper 2 are the same as those of the first embodiment, but the shapes of the cap 23 and the hollow shaft 24 are different from those of the first embodiment.

Next, the cap 23 according to the second embodiment will be described. As shown in FIG. 7B, the cap 23 has a substantially hexagonal nut shape, and the inner peripheral surface of the cap 23 has a female screw-shaped thread screwed into the thread groove 24b of the hollow shaft 24. A groove 23b is formed. However, the cap 23 is not formed with the fitting portion 3a of the cap 3 according to the first embodiment.

Next, the hollow shaft 24 according to the second embodiment will be described. The hollow shaft 24 is a substantially pipe-shaped member as shown in FIGS. 8A and 8B. A male screw-shaped thread groove 24b into which the thread groove 23b of the cap 23 is screwed is formed on the outer surface of the hollow shaft 24 on the lower end portion 24c side, and the inner peripheral surface on the lower end portion 24c side is formed on the inner peripheral surface of the hollow shaft 24. A fitting portion 24a into which the outer peripheral surface 2a of the stopper 2 is fitted is formed. Further, an extending portion 24d is formed on the inner diameter side in the radial direction from the fitting portion 24a. In the second embodiment, the fitting portion 24a of the hollow shaft 24 has a hexagonal shape, and the inner surface shape of the fitting portion 24a is complementary to the outer surface shape of the stopper 2. Then, the outer peripheral surface 2a of the stopper 2 comes into contact with the fitting portion 24a of the hollow shaft 24, and the stopper 2 fits into the hollow shaft 24.

Next, a method of attaching the connecting rod 1 to the hollow shaft 24 will be described. In the following, it is assumed that the stirring blade 5 is attached to the connecting rod 1 in advance. First, the end of the connecting rod 1 on the side to which the stirring blade 5 is not attached is inserted into the cap 23, and the cap 23 is held so as to be located in the vicinity of the stirring blade 5. Then, the engaging portion 2b of the stopper 2 is engaged with the outer surface engaging portion 1b of the connecting rod 1. Then, the end portion of the connecting rod 1 with which the stopper 2 is engaged is inserted into the hollow shaft 24 from the lower end portion 24c of the hollow shaft 24. After that, the connecting rod 1 is moved upward or the hollow shaft 24 is moved downward, the outer peripheral surface 2a of the stopper 2 is fitted to the fitting portion 24a of the hollow shaft 24, and the connecting rod 1, the stopper 2 and the hollow shaft 24 are integrated. To make it. Next, the threaded groove 23b of the cap 23 is brought into contact with the threaded groove 24b of the hollow shaft 24. By rotating the cap 23 in the tightening direction in this state, the threaded groove 23b of the cap 23 is screwed into the threaded groove 24b of the hollow shaft 24. When the cap 23 is further tightened and the fastening is completed, the connecting rod 1 is fixed to the hollow shaft 24. In this way, the connecting rod 1 can be easily attached to the hollow shaft 24.

According to the connecting mechanism according to the second embodiment described above, the engaging portion 2b of the stopper 2 engages with the outer surface engaging portion 1b of the connecting rod 1, and the outer peripheral surface 2a of the stopper 2 fits the hollow shaft 24. It is fitted to the joint portion 24a. Therefore, when the connecting rod 1 is attached to the hollow shaft 24 by the cap 23, the rotation of the connecting rod 1 with respect to the hollow shaft 24 is restricted by the stopper 2, so that the idling of the connecting rod 1 can be suppressed. Further, in a state where the cap 23 is screwed into the threaded groove 24b of the hollow shaft 24, the upper end portion of the stopper 2 comes into contact with the extending portion 24d of the hollow shaft 24, so that the connecting rod 1 can move upward. Be regulated. The regulation of the downward movement of the connecting rod 1 is the same as that of the first embodiment.

Further, also in the connecting mechanism according to the second embodiment, the stopper 2 is only engaged with the connecting rod 1 and fitted with the hollow shaft 24. Therefore, a complicated mounting process is not required, and mounting can be easily performed. Further, since the connection rod 1, the stopper 2, the cap 23 and the hollow shaft 24 according to the second embodiment can be replaced and attached to the existing device, the configuration of the existing device can be used.

In the connecting mechanism according to the second embodiment, since the stopper 2 is housed in the fitting portion 24a of the hollow shaft 24, it is possible to prevent the stopper 2 from falling off. Other effects are the same as in Example 1.

(Modification 1)
The connection rod 31 and the stopper 32 according to the first modification will be described. FIG. 9A is a cross-sectional view of the stopper 32 and the connecting rod 31 that engage with the connecting rod 31 according to the first modification. 9 (B) and 9 (C) are perspective views of the stopper 32. In the description of the modification 1, the points different from those of the first embodiment will be described, and the description of the same components as those of the first embodiment will be omitted.

First, the connection rod 31 according to the first modification will be described. As shown in FIG. 9A, the outer surface engaging portion 31b (engaging surface) of the connecting rod 31 is provided so as to define five rounded corners 31c around the outer circumference of the connecting rod 31. Its cross section is pentagonal. However, it suffices if the outer surface engaging portion 31b is formed so as to define at least three corners 31c. Further, it is sufficient that at least four outer surface engaging portions 31b are formed intermittently in the circumferential direction, but five may be formed. According to this configuration, the corners 31c having at least three rounds are defined around the outer circumference of the connecting rod 31, and the stress in the connection can be dispersed as compared with the conventional example. Therefore, the connecting rod 31 is idle. Can be suppressed.

Next, the stopper 32 according to the first modification will be described. The outer surface shape of the stopper 32 according to the first modification is a substantially pentagon (substantially C-shaped) having one side 32d missing and four sides 32d. Four engaging portions 32b are formed on the inner surface of the stopper 32, and each of the four engaging portions 32b engages with each of the outer surface engaging portions 31b of the connecting rod 31. Compared with the stopper 2 according to the first embodiment, the stopper 32 has an effect that it is easy to attach to the connecting rod 1 by having four engaging portions 32b. Further, the connecting rod 31 and the stopper 32 according to the first modification can be applied by improving the shape of the connecting mechanism according to the second embodiment.

(Modification 2)
The stopper 42 according to the second modification will be described. 10 (A) is a cross-sectional view of the stopper 42 according to the modified example 2, and FIGS. 10 (B) and 10 (C) are perspective views of the stopper 42. In the description of the modification 2, the points different from those of the first embodiment will be described, and the description of the same components as those of the first embodiment will be omitted. The outer surface shape of the stopper 42 is a substantially hexagon (substantially C-shaped) having one side 42d missing and five sides 42d, and five engaging portions 42b are formed on the inner surface of the stopper 42. Has been done.

The connecting rod corresponding to the stopper 42 according to the second modification may have at least five engaging surfaces formed so as to define at least four rounded corners on the outer circumference. Further, the stopper 42 can correspond to the connection rod 1 according to the first embodiment, which has six corners 1c having rounded outer circumferences.

Further, since the thin-walled portion 42e is formed on the opposite side of one missing side of the stopper 42 (not shown), the stopper 42 differs from the stopper 2 according to the first embodiment in the opening direction of the stopper 42. Has flexibility. That is, the stopper 42 according to the modified example 2 having the thin-walled portion 42e has an effect that it is easier to attach to the connecting rod 1 as compared with the stopper 2 according to the first embodiment. Further, the stopper 42 according to the modified example 2 can also be applied to the connecting mechanism according to the second embodiment.

(Modification 3)
The stopper 52 according to the modified example 3 will be described. FIG. 11 is a perspective view of the stopper 52 according to the modified example 3. In the description of the modification 3, the points different from those of the first embodiment will be described, and the description of the same components as those of the first embodiment will be omitted. The outer surface shape of the stopper 52 is a substantially hexagon (substantially C-shaped) having one corner 52c missing and five corners 52c. Six engaging portions 52b are formed on the inner surface of the stopper 52, and two pairs of upper and lower cutout portions 52e are formed on the angle 52c facing one missing corner (not shown). As described above, since the stopper 52 according to the modified example 3 has two pairs of upper and lower cutout portions 52e, there is an effect that it is easier to attach to the connecting rod 1 as compared with the stopper 2 according to the first embodiment. .. Further, the stopper 52 according to the modified example 3 can also be applied to the connecting mechanism according to the second embodiment.

Although the present invention has been described above with reference to each example and each modification, the present invention is not limited to the above examples and each modification. The present invention also includes inventions modified to the extent not contrary to the present invention, and inventions equivalent to the present invention. Further, the above-mentioned Examples and Modifications can be appropriately combined as long as they do not contradict the present invention.

In each of the above embodiments and modifications, the hollow shafts 4 and 24, which are rotation transmission portions, were removable from the rotating plate, but the hollow shafts 4 and 24 and the rotating plate are integrally configured. You can also do it. In this case, the portions extending below the rotating plate are the hollow shafts 4 and 24. Further, instead of the hollow shafts 4 and 24, the motor shaft may be extended and the extending portion may be the hollow shafts 4 and 24. Further, although the hollow shafts 4 and 24 are connected members, the connected members of the present invention are not limited to these hollow shafts 4 and 24, and have a split-type stirring blade 5 with respect to the connecting rods 1 and 31. It is also possible to connect the head portion as a member to be connected and use it. Further, the connecting mechanism of the present invention can be simultaneously applied to the connection between the connecting rods 1 and 31 and the hollow shafts 4 and 24 and the connection between the head portion having the stirring blade 5.

Further, in the stirring device 100 of the first embodiment, the tapered lower portion 7a of the joint portion 7 is inserted into the stirring container 10 and is supported by the stirring container 10. However, the stirrer 100 can also be held in a stand for the stirrer and supported by the stand.

1, 31 Connection rod 1a Core member 1b, 31b Outer surface engaging part (engaging surface)
1c, 31c Square 1d Outer layer 2, 32, 42, 52 Stopper (engagement member)
2a Outer peripheral surface 2b, 32b, 42b, 52b Engagement part 2c, 52c Square 3, 23 Cap (fastening member)
3a Fitting part (inner peripheral surface)
4, 24 Hollow shaft (connected member)
5 Stirring blade 9 Drive unit 24a Fitting unit (inner peripheral surface)
32d, 42d Side 100 Stirrer

Claims (14)

With the connection rod,
The connected member connected to the connecting rod and
An engaging member that engages with the connecting rod and
A stirring device including a fastening member screwed to the connected member.
Engaging surfaces are provided around the outer periphery of the connecting rod so as to define at least three corners, and a plurality of engaging portions of the engaging member are engaged with each of the engaging surfaces. Go
The stirring device is characterized in that the connecting rod is connected to the connected member by fastening the fastening member via the engaging member. The engaging member is located between the connecting rod and the fastening member.
The stirring device according to claim 1, wherein the outer peripheral surface of the engaging member is fitted to the inner peripheral surface of the fastening member. The engaging member is located between the connecting rod and the connected member.
The stirring device according to claim 1, wherein the outer peripheral surface of the engaging member is fitted to the inner peripheral surface of the connected member. The stirring device according to any one of claims 1 to 3, wherein the engaging member has a C-shaped cross section. The stirring device according to any one of claims 1 to 4, wherein the engaging member has a pentagonal or hexagonal cross section in which one side is missing. The stirring device according to any one of claims 1 to 4, wherein the engaging member has a pentagonal or hexagonal cross section in which one corner is missing. The stirring device according to any one of claims 1 to 6, wherein the cross section of the connecting rod on the engaging surface is pentagonal or hexagonal. The stirring device according to any one of claims 1 to 7, wherein the connecting rod has a core member made of a metal material, and the outer layer of the core member is covered with a resin material. Further equipped with a drive unit and stirring blades,
The one according to any one of claims 1 to 8, wherein the connected member is a hollow shaft rotationally driven by the driving portion or a head portion having the stirring blade rotationally driven by the connecting rod. The stirrer according to the description. Further equipped with a drive unit and stirring blades,
The one according to any one of claims 1 to 8, wherein the connected member is a head portion having a hollow shaft rotationally driven by the driving portion and a stirring blade rotationally driven by the connecting rod. Stirrer. A connecting rod that can be connected to the member to be connected.
An engaging surface is provided around the outer circumference of the connecting rod so as to define at least three corners.
An engaging member having a plurality of engaging portions can be engaged with each of the engaging surfaces.
The connecting rod is characterized in that it can be connected to the connected member by fastening the fastening member via the engaging member. 11. The connecting rod according to claim 11, wherein the cross section of the connecting rod on the engaging surface is pentagonal or hexagonal. The connecting rod according to claim 11 or 12, wherein the connecting rod has a core member made of a metal material, and the outer layer of the core member is covered with a resin material. A connecting mechanism for connecting a connecting rod to a member to be connected.
An engaging surface is provided on the outer periphery of the connecting rod so as to define at least three corners.
An engaging member having a plurality of engaging portions is engaged with each of the engaging surfaces.
A connecting mechanism characterized in that the connecting rod and the connected member are connected by fastening the fastening member via the engaging member.

Images