JP2014136203A - Agitator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the rotational movement of a blade in agitation, even with a structure for opening-closing the blade when an attitude of the blade changes.SOLUTION: When inserting respective blades 4 of an agitator 1 into a paint can 31 from a pouring port 32 of the paint can 31, the respective blades 4 are lifted upward. In the agitation, the respective blades 4 rotate together with a rod part 2, and the respective blades 4 open in the lateral direction by centrifugal force of rotation. When the rotation stops, the respective blades 4 are lowered by dead weight. When the respective blades 4 close in this way, the respective blades 4 of the agitator 1 can be extracted outside the paint can 31 from the pouring port 32. The respective blades 4 have a plane symmetry shape with a reference plane in the same as or parallel to a plane of including a locus of the rotation of the respective blades 4 of rotating in a state of opening by the rotation of the rod part 2 as a boundary. Thus, even in a structure of changing attitudes of the respective blades 4 by the centrifugal force and the dead weight, the movement is stabilized in the paint, of the respective blades 4 in the agitation.

Description

  The present invention relates to a stirrer that stirs a liquid such as a paint.

  For example, when coating an object to be coated such as a power transmission line tower, paint is prepared such that the main agent and the curing agent are mixed, or this mixture and thinner are mixed. The main component of the paint is contained in a container, specifically, a paint can (for example, a funnel can). When preparing the paint, usually a curing agent or the like is added to the paint can containing the main agent, and the main agent and the curing agent are mixed in the paint can using a stirrer. Hereinafter, a hardener added to the main agent and not yet mixed is also referred to as a paint for convenience of explanation.

  The stirrer is configured by connecting the proximal end side of a rod having blades provided at the distal end thereof to a rotary drive device incorporating an electric motor or the like. Insert the tip of the rod into the paint, sink the blade into the paint, and drive the rotary drive. Thereby, a rod rotates, a blade | wing rotates in connection with this, and a coating material is stirred with a blade | wing.

  By the way, some paint cans have a spout with a diameter of about 40 mm. By covering the spout, the inside of the paint can can be sealed. In the case of such a paint can, in order to stir the paint in the paint can, it is necessary to put the blade of the stirrer into the paint can. However, since the diameter of the spout is small, the blade is at the edge of the spout. I bumped up and I couldn't put the wings in the paint can. Therefore, in many cases, the top plate of the paint can is cut open, the upper portion of the paint can is greatly opened, and the blades of the stirrer are placed in the paint can to stir the paint.

  However, if the top plate of the paint can is cut open, it becomes difficult to seal the inside of the paint can. If the paint can cannot be sealed, the paint that has not been used up cannot be stored, and the paint tends to spill during transportation. In addition, when the top plate of the paint can is cut using a tool, the operator may be injured.

  Then, the stirrer which can put a blade | wing into the paint can from the small spout of a paint can is known. For example, in the stirring device described in Patent Document 1 below, when the rod is rotating for stirring, the blades are spread, that is, the blades are in an open state, and when the rotation is stopped, the blades are in the axial direction of the rod. The posture is brought close, that is, the blade is closed. When the blade is closed, the overall diameter of the blade is reduced, so that the blade can be passed through the spout. The stirring device described in Patent Document 2 below has a similar configuration.

JP 2007-245130 A Japanese Patent Laid-Open No. 11-147032

  However, in a stirrer that opens and closes by changing the posture of the blades as described in Patent Documents 1 and 2, the blades move up and down during stirring, and the rotational movement of the blades is unstable. There is a problem of becoming.

  That is, in the stirrer described in Patent Document 1 or 2, the blade naturally spreads to the left and right due to centrifugal force when the rod rotates, and when the rod stops, the blade naturally leans against the rod due to the weight of the blade. Become posture. In order to realize such a change in the posture of the blade, the stirrer described in Patent Document 1 or 2 is supported by the rod so that the blade can rotate around a straight line that intersects the axis of the rod. Yes. Moreover, in order to change the posture of the blade by centrifugal force or its own weight, the blade is loosely supported by the rod, and the blade rotates with respect to the rod only by applying a slight force to the blade.

  Thus, in the stirrer described in Patent Document 1 or 2, since the blade is not fixed to the rod and the blade is rotatable with respect to the rod, the rod is rotated for stirring. At this time, although the blades are spread left and right due to the centrifugal force, the blades may be pushed and rotated by the paint, for example, and the blades may shake up and down.

  When the blades shake up and down and the rotational movement of the blades becomes unstable, the rotational speed of the blades decreases and the stirring force decreases. Moreover, vibration becomes large and it becomes difficult for the operator to support the stirrer. Also, if the operator cannot support the stirrer due to vibration, the blades will collide with the inner wall of the paint can, the blades will be chipped, or the inner wall of the paint can will be scraped off, and the blades and inner wall fragments will become foreign matter in the paint. It will mix.

  The present invention has been made in view of, for example, the problems described above, and an object of the present invention is to stabilize the rotational movement of the blades during stirring while having a structure in which the blades open and close by changing the posture of the blades. It is in providing the stirrer which can be made.

  In order to solve the above-mentioned problems, a first stirrer of the present invention is a stirrer for stirring a liquid, and is connected to the rotation drive device at the base end side to receive the power of the rotation drive device and receive an axis. A rod-shaped rod portion rotatable around the rod, two or more blades for stirring the liquid by moving in the liquid when the rod portion rotates, and each blade on the tip side of the rod portion And a base end side of each blade is rotatably supported by the support portion so that a tip side of each blade rotates about a straight line intersecting an axis of the rod portion, and the rod When the portion rotates, the blades open by rotating the tip side of each blade away from the axis of the rod portion.When the rod portion is not rotating, the tip side of each blade is Connected to the rod axis The blades can be closed by pivoting in the direction of rotation, and the blades are the same or parallel to a plane including the locus of rotation of the blades rotated in the open state by the rotation of the rod portion. It has a shape symmetrical with respect to the reference plane.

  Further, the second stirrer of the present invention is the above-described first stirrer of the present invention, wherein each blade is bent or flattened so that the blade has a V-shaped cross section. It is formed by combining two flat plates.

  Further, the third stirrer of the present invention is the above-described first or second stirrer of the present invention, wherein each blade is directed in a direction in which the tip side of the blade is parallel to the axis of the rod portion. It is possible to rotate from the posture to the posture where the tip side of the blade is directed in the direction opposite to the one direction.

  Moreover, the 4th stirrer of this invention is a stirrer in any one of the 1st thru | or 3rd of this invention mentioned above, Each fin protrudes from the surface, The fin part which the said liquid touches at the time of stirring It is formed.

  According to the present invention, the rotational movement of the blades can be stabilized during agitation while having a structure in which the blades open and close by changing the posture of the blades.

It is a front view which shows the stirrer by the 1st Embodiment of this invention. It is a bottom view which shows the stirrer by the 1st Embodiment of this invention. It is a cross-sectional view of the blade | wing of the stirrer by the 1st Embodiment of this invention seen from the arrow III-III direction in FIG. It is explanatory drawing which shows the state which the blade | wing closed upwards in the stirrer by the 1st Embodiment of this invention. It is explanatory drawing which shows the state which the blade | wing closed downward in the stirrer by the 1st Embodiment of this invention. It is explanatory drawing which shows the utilization aspect of the stirrer by the 1st Embodiment of this invention. In the stirrer by the 2nd Embodiment of this invention, it is a front view which shows the front end side of a rod part, a support part, and a blade | wing. It is a bottom view which shows the stirrer by the 2nd Embodiment of this invention. It is a front view which shows the front end side of a rod part, a support part, and a blade | wing in the stirrer by the 3rd Embodiment of this invention. It is a bottom view which shows the stirrer by the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1 to 5 show a stirrer according to a first embodiment of the present invention. For convenience of explanation, the directions of the top, bottom, left, and right of the stirrer are determined as shown by arrows in FIG. In FIG. 1, a stirrer 1 according to the first embodiment of the present invention is an apparatus used to stir paint, for example, as a liquid. The stirrer 1 is used by being attached to a rotation drive device 21 (see FIG. 6). The rotation drive device 21 is a hand mixer, for example, and incorporates an electric motor or the like that generates rotational power.

  The stirrer 1 includes a rod portion 2, a joint portion 3, two blades 4, and a support portion 5. The rod portion 2 is a member that supports each blade 4 at a position away from the rotation driving device 21 and rotates each blade 4 by receiving the rotational power of the rotation driving device 21. The rod portion 2 is formed into a long rod shape from a strong material that does not easily bend, for example, a metal having such properties. The length of the rod portion 2 is set to, for example, about 600 mm in consideration of the height (for example, 350 mm) of the paint can 31 (see FIG. 6) containing the paint to be stirred and the handling during operation. Moreover, the cross section of the rod part 2 is circular, for example, The diameter is about 5 mm-10 mm.

  The joint portion 3 is a member for joining the rod portion 2 to the rotation drive device 21. The joint portion 3 is formed in a cylindrical shape or a column shape by, for example, a metal material, and is fixed to the upper end portion of the rod portion 2. The joint portion 3 and the rod portion 2 are disposed on the same axis P. The specific shape of the joint portion 3 is formed so as to correspond to the structure of the mounting portion 22 (see FIG. 6) to which the stirrer 1 is attached in the rotation drive device 21. In this embodiment, since the hexagonal mounting hole is formed in the mounting part 22 to which the stirrer 1 is attached in the rotary drive device 21, the joint part 3 is formed in a prismatic shape having a hexagonal cross section, and its diameter is For example, 8 mm.

  Each blade 4 is a member that stirs the paint by moving through the paint when the rod portion 2 rotates. As will be described later, each blade 4 is supported by a support portion 5 fixed to the tip portion of the rod portion 2. The blades 4 are disposed so as to face each other in a direction perpendicular to the axis P, with one point on the axis P as an intermediate point. The blades 4 are arranged point-symmetrically with respect to one point on the axis P.

  3 is a cross-sectional view of the blade 4 as seen from the direction of arrows III-III in FIG. As shown in FIG. 3, each blade 4 includes a blade shaft 11 and a blade plate 12. The blade shaft rod 11 is a member that supports the blade plate 12, and is formed of, for example, stainless steel in a rod shape having a length of about 50 mm and a diameter of about 4 mm.

  The slat 12 is a member that stirs the paint. For example, the slat 12 is made of stainless steel and is crossed by bending a flat plate having a length of about 50 mm, a width of about 30 mm to 40 mm, and a thickness of about 1.5 mm to 2 mm. The surface is V-shaped. By forming the vane plate 12 from stainless steel, there is an advantage that sufficient strength can be secured, rust can be prevented, and therefore no coating is required to prevent rust. Since the slat 12 is not covered, it is possible to prevent the coating from being peeled off when the slat 12 hits the inner surface of the paint can 31 and mixed into the paint as a foreign matter.

  Moreover, as shown in FIG. 2, the blade 12 is rounded. By removing the pointed corners into a round shape, when the blades hit the inner surface of the paint can 31, the inner surface of the paint can 31 is scraped off and prevented from entering the paint as a foreign object. be able to.

  The blade shaft bar 11 is disposed inside the blade plate 12 and is positioned at a bent portion of the blade plate 12. The vane plate 12 is fixed to the vane shaft rod 11. By making each blade | wing 4 into the simple shape which combined the rod-shaped blade | wing axis | shaft rod 11 and the cross-sectional V-shaped blade | wing plate 12, the coating material adhering to each blade | wing 4 can be washed off easily after stirring.

  As can be seen from FIG. 3, each blade 4 has a plane-symmetric shape with respect to the reference plane Q. Specifically, in each blade 4, the blade shaft rod 11 is symmetric with respect to the reference plane Q. In the slat 12, the one side portion 12 </ b> A and the other side portion 12 </ b> B are symmetrical with respect to the reference plane Q. As will be described later, the movement of each blade 4 during agitation can be stabilized by making each blade 4 a plane-symmetrical shape.

  Further, the portions 12A and 12B are inclined in directions opposite to each other with respect to the reference plane Q, and the portions 12A and 12B are moved from the front side to the rear side in the direction R in which each blade 4 moves during stirring. Gradually move away from the reference plane Q. Thus, by making the blade plate 12 into a symmetrical cross-sectional V-shaped shape with respect to the reference plane Q, the movement of each blade 4 during stirring can be further stabilized.

  The support portion 5 is a member that supports each blade 4 on the tip portion of the rod portion 2. The support portion 5 includes a support body 15 formed in a disk shape, for example, and two connection portions 16 that connect the blades 4 and the support body 15. The support 15 is disposed such that its disk-shaped surface is orthogonal to the axis P, and the center of the support 15 is fixed to the tip of the rod portion 2. In addition, the support 15 is formed with a plurality of holes 17 through which the paint passes when the support portion 5 enters or leaves the paint. Thereby, the resistance at the time of putting the front-end | tip part of the rod part 2 of the stirrer 1, each blade | wing 4 and the support part 5 into a coating material, or taking out from a coating material becomes small, and can take out and take out easily.

  The connecting portions 16 are arranged so as to face each other in a direction perpendicular to the axis P with one point on the axis P as an intermediate point, and are fixed to the peripheral side of the support 15. Each connection part 16 has the same structure as a hinge, for example. Each connection portion 16 rotatably connects the base end side of the blade 4 to the support body 15 so that the tip end side of the blade 4 rotates around a straight line orthogonal to the axis P of the rod portion 2.

  As shown in FIG. 4, each blade 4 can take a first posture in which the tip end side of the blade 4 faces upward and is directed in a direction substantially parallel to the axis P of the rod portion 2. For example, each blade 4 can be brought into the first posture by lifting the tip side of each blade 4 upward by the operator. In the first posture, the tip side of each blade 4 is not exactly parallel to the axis P of the rod portion 2. That is, in the first posture, the tip side of each blade 4 is inclined so that the tip side of each blade 4 is closer to the rod portion 2 than the state in which the tip side of each blade 4 is exactly parallel to the axis P of the rod portion 2. Therefore, in a state where the rod portion 2 is set up vertically, each blade 4 maintains the first posture after the operator lifts each blade 4 to the first posture. As shown in FIG. 4, when each blade 4 is in the first posture, the overall diameter d1 of the tip of the stirrer 1 is larger than the diameter d4 of the spout 32 of the paint can 31 (see FIG. 6). For example, it becomes smaller than 40 mm.

  In addition, since each blade 4 is rotatably supported by the support 15 by the connecting portion 16, each blade 4 has the tip end side of the blade 4 facing sideways as shown in FIG. 1, and the axis of the rod portion 2. A second posture oriented in a direction orthogonal to P can be taken. When the rotation drive device 21 is driven, the rod portion 2 is rotated, and the support portion 5 and each blade 4 are rotated, each blade 4 is opened by the centrifugal force of rotation, and naturally takes the second posture. As shown in FIG. 1, when each blade 4 is in the second posture, the overall diameter d2 of the tip of the stirrer 1 is compared with the diameter d1 when each blade 4 is in the first posture. (For example, the length exceeds 10 mm).

  Further, since each blade 4 is rotatably supported by the support 15 by the connection portion 16, each blade 4 has the tip end side of the blade 4 facing downward as shown in FIG. 5, and the axis of the rod portion 2. A third posture oriented in a direction substantially parallel to P can be taken. When the rod portion 2 is rotated and each blade 4 is in the second posture by the centrifugal force of rotation, when the rotation of the rod portion 2 is stopped, each blade 4 is in the third posture due to its own weight. As shown in FIG. 5, when each blade 4 is in the third posture, the overall diameter d3 of the tip of the stirrer 1 is the same as the diameter d1 when each blade 4 is in the first posture. Yes, it is smaller than the diameter d4 of the spout 32 of the paint can 31 and is, for example, less than 40 mm.

  In this way, each blade 4 can be rotated 180 degrees or more from the first posture to the third posture. A state where each blade 4 is in the first posture or the third posture is a state where each blade 4 is closed, and a state where each blade is in the second posture is a state where each blade 4 is opened.

  FIG. 6 shows how the stirrer 1 is used. When stirring the paint contained in the paint can 31, first, the operator joins the joint portion 3 of the stirrer 1 to the mounting portion 22 of the rotary drive device 21 as shown in FIG. . Subsequently, the operator makes each rod portion 2 vertical, lifts the tip side of the blade 4, rotates the tip side of each blade 4 in a direction approaching the rod portion 2, and makes each blade 4 have the first posture. To. Thereby, the whole diameter d1 of the front-end | tip part of the stirrer 1 becomes less than 40 mm, for example. Since the diameter d4 of the spout 32 of the paint can 31 is, for example, 40 mm, the operator can remove the tip of the stirrer 1, that is, the tip of the rod 2, the blades 4 and the support 5 from the spout 32. It can be inserted into the can 31. Subsequently, the operator sinks each blade 4 into the coating material 33 until it is properly positioned for stirring.

  Subsequently, the operator turns on the drive switch 23 of the rotation driving device 21 to drive the rotation driving device 21 while holding the grip portion 24 of the rotation driving device 21. Thereby, the rod part 2 rotates, and each blade | wing 4 rotates the axis line P in connection with this. Then, as shown in FIG. 6 (2), the distal end side of each blade 4 is rotated in a direction away from the rod portion 2 by the centrifugal force of rotation, and each blade 4 naturally assumes the second posture. Since each blade | wing 4 rotates in the state spread in the horizontal direction, the coating material 33 is stirred extensively. Thereby, the coating material 33 can be sufficiently stirred.

  While each blade 4 is rotating in the second posture, the reference plane Q (see FIG. 3) of each blade 4 and the plane S (see FIG. 1) including the rotation trajectory of each blade 4 are mutually connected. Identical or parallel. Since each blade 4 has a plane-symmetric shape with respect to the reference plane Q, a component F1 in one direction orthogonal to the reference plane Q and a component in the direction opposite to the one direction out of the force applied to each blade 4 F2 is balanced with each other. Thereby, each blade | wing 4 comes to move on the same plane, and a movement is stabilized.

  Subsequently, when the stirring of the paint 33 is completed, the operator turns off the drive switch 23 of the rotation drive device 21. Thereby, rotation of the rod part 2, the support part 5, and each blade | wing 4 stops. As a result, since the centrifugal force of rotation disappears, as shown in FIG. 6 (3), the tip side of each blade 4 is lowered by its own weight, and the tip side of each blade 4 is rotated in a direction approaching the rod portion 2, Each blade 4 is in the third posture. Thereby, since the whole diameter of the front-end | tip part of the stirrer 1 will be less than 40 mm, for example, an operator will remove the tip part side of the rod part 2, each blade | wing 4 and the support part 5 from the spout 32 out of the paint can 31. Can be extracted.

  As described above, according to the stirrer 1 according to the first embodiment of the present invention, each blade 4 of the stirrer 1 is inserted into the paint can 31 from the spout 32 of the paint can 31, The paint can be stirred. And while stirring, it can prevent that each blade | wing 4 shakes up and down, and the rotational movement of each blade | wing 4 can be stabilized. Accordingly, it is possible to prevent a decrease in the rotation speed of each blade 4 and maintain a good stirring force. Moreover, since the movement of each blade 4 is stabilized, vibration is suppressed. Therefore, the operator can easily support the stirrer 1 with a small force. Therefore, the operator can support the stirrer 1 so that the blades 4 do not collide with the inner wall of the paint can 31 during the agitation, and the blade can be damaged by the collision, or the inner wall of the paint can 31 can be damaged. It is possible to prevent the generated fragments from being mixed into the paint.

  Moreover, according to the stirrer 1, when each blade | wing 4 is inserted in the coating material can 31, it can be set as the 1st attitude | position which the front end side of each blade | wing 4 faces upwards. Thereby, it becomes easy to insert each blade 4 into the paint can 31. On the other hand, when each blade 4 is extracted from the paint can 31, the second posture is such that the tip side of each blade 4 faces downward. Thereby, each blade 4 can be easily extracted from the paint can 31.

(Second Embodiment)
7 and 8 show a stirrer according to a second embodiment of the present invention. As shown in FIGS. 7 and 8, the stirrer 51 according to the second embodiment of the present invention has a plurality of fins 52 formed on the outer surface of the blade 12 of each blade 4. Each fin portion 52 protrudes from the outer surface of the blade 12. Further, as shown in FIG. 8, each fin portion 52 extends in a predetermined direction that is not parallel to the longitudinal direction of the blade 4 but is not orthogonal to the length direction. For example, the extending direction of each fin portion 52 extends in a direction having an angle of, for example, about 25 to 75 degrees, or about 115 to 165 degrees with respect to the length direction of the blades 4. Further, the shape and arrangement of the fin portions 52 are set so as to be symmetric with respect to the reference plane Q.

  At the start of stirring, when each blade 4 starts to rotate in the paint, the paint hits the fin portion 52 of each blade 4. Thereby, each blade | wing 4 becomes easy to change to a 2nd attitude | position, and each blade | wing 4 which became the 2nd attitude | position will move stably in a coating material, maintaining the attitude | position.

  According to the second embodiment of the present invention having such a configuration, the movement of each blade 4 can be further stabilized during stirring.

(Third embodiment)
9 and 10 show a stirrer according to a third embodiment of the present invention. In the stirrer 61 according to the third embodiment of the present invention, each blade 62 is formed in a rectangular flat plate shape, and a plurality of fins 63 are provided on the outer surface of each blade 62. In addition, each fin portion 63 extends in a predetermined direction that is not parallel to the length direction of the blade 4 but is not orthogonal to the length direction of the blades 4 in substantially the same manner as the fin portion 52 in the second embodiment. . Further, the shape of each blade 62 and the shape and arrangement of the fin portions 63 are set so as to be symmetric with respect to the reference plane Q.

  Also according to the third embodiment of the present invention having such a configuration, it is possible to stabilize the movement of each blade 62 during stirring.

  In addition, although the number of blades of the stirrer 1 (51, 61) according to each embodiment described above is two, the number of blades may be three, four, or five or more. In order to balance the rotation, the blades are desirably arranged at equal intervals in the circumferential direction with the axis P of the rod portion 2 as a reference. However, in order to simplify the shape of the stirrer 1 so that the paint adhering to the stirrer 1 (51, 61) can be easily washed off after the stirring operation, the number of blades is better. Is desirable.

  Moreover, in the stirrer 1 by 1st Embodiment mentioned above, although the case where the blade board 12 of a cross-sectional V shape was formed by bending a flat plate was mentioned as an example, this invention is not limited to this. Two blades may be combined to form the slat 12 having a V-shaped cross section.

  The stirrer 1 (51, 61) according to each of the above-described embodiments can also be used to stir liquids other than paint, such as edible oil.

  Further, the present invention can be appropriately changed without departing from the spirit or idea of the invention which can be read from the claims and the entire specification, and a stirrer including such a change is also included in the technical idea of the present invention. included.

DESCRIPTION OF SYMBOLS 1, 51, 61 Stirrer 2 Rod part 4, 62 Blade 5 Support part 11 Blade shaft rod 12 Blade plate 15 Support body 16 Connection part 21 Rotation drive device 31 Paint can 32 Spout 52, 63 Fin part

Claims (4)

A stirrer for stirring liquid,
By connecting the base end side to the rotary drive device, a rod-shaped rod portion that can receive the power of the rotary drive device and rotate around the axis line; and
Two or more blades that stir the liquid by moving in the liquid when the rod portion rotates;
A support portion for supporting each blade on the tip side of the rod portion;
When the base end side of each blade is rotatably supported by the support portion so that the front end side of each blade rotates around a straight line intersecting the axis of the rod portion, The blades are opened by rotating the tip side of the blade in a direction away from the axis of the rod portion, and when the rod portion is not rotating, the tip side of the blade is moved in a direction approaching the axis of the rod portion. Each blade can be closed by turning,
Each of the blades has a shape symmetrical with respect to a reference plane that is the same as or parallel to a plane including a rotation trajectory of each blade rotating in an open state by the rotation of the rod portion. vessel.   2. The stirring according to claim 1, wherein each blade is formed by bending one flat plate or combining two flat plates so that the cross section of the blade is V-shaped. vessel.   Each of the blades is rotatable from a posture in which the tip side of the blade is oriented in one direction parallel to the axis of the rod portion to a posture in which the tip side of the blade is oriented in a direction opposite to the one direction. The stirrer according to claim 1 or 2, wherein the stirrer is.   The stirrer according to any one of claims 1 to 3, wherein each of the blades is formed with a fin portion that protrudes from a surface of the blade and contacts the liquid during stirring.

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