JPH0750175Y2 - Mixing blade device for mixer - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is mainly suitable for stirring and kneading aggregates such as cement, sand, water, and gravel that are put into the drum of a concrete mortar mixer. The present invention relates to a stirring blade device for a mixer which is forcibly rotated in a drum by external power.

(Prior Art) Conventionally, in this type of mixing blade device for a mixer, various improvements have been made to enable efficient and sufficient stirring and kneading of aggregates and the like put into the drum of the mixer. Has been done.

For example, there is a concrete mortar mixer as described in Japanese Utility Model Publication No. Sho 53-24907, which has a rotary shaft that constantly rotates in a fixed direction on a drum whose both ends are closed and at least the lower half has an arcuate cross section. Agitating the rotary shaft by twisting it to the right, making its total length shorter than the length of the drum, and making the angle passing through the center of the rotary shaft at one end and the other end within 180 degrees in the direction perpendicular to the rotary shaft. In the drum, the blade body is moved toward one end of the drum, and a space is provided between the stirring blade body and the other end of the drum to fix the blade body. The stirring blade body whose length is shorter than the length of the drum and the angle passing through the center of the rotation axis at one end and the other end in the direction perpendicular to the rotation axis is within 180 degrees in the other side of the drum. Toward the end of the stirring blade body And a space is provided between the drum and one end of the drum, and is fixed to the opposite side to the center of the rotating shaft of the stirring blade body twisted to the right.

In addition, there is a mixing device as described in Japanese Utility Model Laid-Open No. 58-82839, which is a device for charging a mixing tank with a mixture of different kinds of powder or granules or liquid and mixing them. In addition, a first impeller for stirring is rotatably provided in the mixing tank, and a second impeller for floating the object to be mixed is rotatably provided on the side of the bottom wall of the mixing tank of the first impeller. It is provided.

Further, there is a construction material mixing apparatus as described in Japanese Utility Model Publication No. 51-39454. This is an apparatus for mixing construction materials, which has a cylindrical mixing vessel and a mixing tool in it, inside the mixing vessel being offset from each other by 180 degrees in front of each top side. Each is provided with one radially extending, rotating support arm, which is angular and carries a spiral spirally curved mixing arm extending beyond the center of the mixing vessel, and on the top side. An additional mixing tool, which is moved in front of the support arm, is arranged on each one shaft passing through it.

(Problems to be solved by the invention) However, in the concrete mortar mixer as described above, the aggregate or the like having one end inside the drum is gradually transferred toward the center of the drum by one stirring blade body, Aggregate and the like with the other end inside is gradually transferred toward the center of the drum by the other stirring blade, and the aggregate and the like in the drum is twilled into a substantially eight shape by both stirring blades and rotates. While moving, the movement intersects in an X-shape and is kneaded and kneaded. Therefore, the kneading capacity is improved compared to the previous one, but the central part of the rotating shaft that penetrates the inside of the drum is kneaded. There was a risk of hindering smooth movement of aggregates inside. Moreover, aggregates and the like during kneading are likely to become entangled in the central portion of the rotating shaft, and there is a risk that they will remain in the form of lumps. The residual aggregates and the like further hinder the stirring and kneading by the stirring blade body. Etc. In addition, if residual aggregate and the like hardens while adhering to the rotating shaft, removal thereof is considerably troublesome.

Further, in the mixing device as described above, there is a drawback that a drive device for rotating the first blade body and a drive device for rotating the second blade body must be separately provided. . Moreover, since the blade body itself is a propeller type, the blade body itself has low strength and is not suitable for stirring cement, sand and water, or aggregates obtained by adding gravel to these.

Furthermore, in the above-mentioned mixing device for construction materials, there is no support at the tip portion or the central portion of the mixing arm, which is the same as the present invention. Or, when it is used in a concrete mortar mixer used when mixing gravel into these and stirring, the load on the base end part of the mixing arm becomes very large due to the large stirring resistance, and this part and the tip end There is a great possibility of damaging the part, and there were problems in strength and durability. Moreover, a drive motor for rotating each mixing arm, a drive motor for rotating each additional mixing tool, and the like are required, and the configuration becomes complicated, and
There were some difficulties such as high costs.

(Means for Solving the Problem) Therefore, the present invention solves the above-mentioned problems such as the above-mentioned problems, and can perform better stirring and kneading of aggregates, etc., and the aggregates are entangled with the rotating shaft, It was devised to provide a stirring blade device for a mixer that does not remain in a lump form and has a simple structure, and that has excellent strength and durability.
Specifically, the cement and the sand, which are driven and rotated in a predetermined direction in the drum 1 formed by closing both end portions of the substantially cylindrical peripheral wall portion 5 with a pair of side wall portions 6, respectively, are put into the drum 1, In a stirring blade device for a concrete mortar mixer that stirs water, gravel, etc., a pair of relatively short rotating shafts 2 mounted on the side wall portions 6 of the drum 1 so as to be rotatable on the same rotation center line. The stirring blade body 3 is fixed to the tip portions of the pair of rotating shafts 2 and is arranged horizontally between the pair of rotating shafts 2.
Are fixed to the respective tip portions of the rotary shafts 2 and are mounted on the pair of mounting plates 4 arranged so as to be substantially orthogonal to the axis of the rotary shaft 2, and horizontally mounted on the tip portions of the pair of mounting plates 4. A pair of blade main bodies 9 that are fixed in a circular shape and are slidable along the inner peripheral surface of the peripheral wall portion 5 of the drum 1, and the substantially central portions in the longitudinal direction of the pair of blade main bodies 9. And a reinforcing plate 10 arranged so as to be substantially orthogonal to the axial center of the two blades, one of the blade main bodies 9 is shorter than the length of the peripheral wall portion 5, and is arranged closer to the one side wall portion 6, and the other blade. The main body 9 is shorter than the length of the peripheral wall portion 5 and arranged near the other side wall portion 6, and the one blade main body 9 and the other blade main body 9 are separated from each other by 180 degrees in the rotation direction of the rotary shaft 2. In addition, the one blade body 9 has one side wall portion 6 and the other side wall portion 6 has an end portion. The blade body 9 is formed in a twisted state so as to move ahead in the rotation direction of the rotary shaft 2. The other side wall portion 6 of the blade body 9 has one side wall portion 6 with respect to the side wall portion 6. , The rotary shaft 2 is formed in a twisted state so as to move forward in the rotational direction of the rotary shaft 2, and one of the pair of rotary shafts 2 is connected to the drive shaft 2A.
In this case, means for structuring the drive shaft 2A so as to appropriately apply a driving torque of power is adopted.

(Operation) Thus, the pair of rotary shafts 2 are formed to be relatively short, and are attached to the side wall portions 6 of the drum 1, respectively, and are rotatable on the same rotation center line. Then, the stirring blade body 3 is fixed to the tip end portions of the pair of rotary shafts 2 and arranged horizontally between the pair of rotary shafts 2. Further, the mounting plate 4 is fixed to the tip end portion of each of the rotary shafts 2,
Are arranged substantially orthogonal to the axial center of the drum, and the pair of blade main bodies 9 are fixed to the tip portions of the pair of mounting plates 4 in a lateral bridge shape, and slide along the inner peripheral surface of the peripheral wall portion 5 of the drum 1. Move. The reinforcing plate 10 connects the pair of blade main bodies 9 with each other in the substantially central portion in the longitudinal direction, and enhances the strength and rigidity of the stirring blade body 3. Moreover, they are arranged so as to be substantially orthogonal to the axis of the rotary shaft 2.

Furthermore, one of the blade main bodies 9 is shorter than the length of the peripheral wall portion 5,
The blade body 9 on the other side is arranged closer to the side wall portion 6 on one side,
It is shorter than the length of the peripheral wall portion 5 and is arranged closer to the other side wall portion 6, and the one blade main body 9 and the other blade main body 9 have the rotation shaft 2
They are placed 180 degrees apart from each other in the direction of rotation. Moreover, one of the blade main bodies 9 is twisted so that one end of the side wall portion 6 is twisted so as to precede the other end of the side wall portion 6 in the rotation direction of the rotary shaft 2. The blade body 9 is twisted so that the other end of the side wall portion 6 is twisted so as to precede the one end of the side wall portion 6 in the rotation direction of the rotary shaft 2, so that Aggregate or the like having the side wall 6 is gradually transferred toward the center of the drum 1 by the one blade main body 9, and the other side wall 6 inside the drum 1 is gradually transferred.
Aggregates and the like on the gutter are gradually transferred toward the center of the drum 1 by the other blade body 9, and the aggregates and the like in the drum 1 are
The blades 9 are traversed in a substantially 8-shape by the both blade main bodies 9 and move while rotating, and they are kneaded and kneaded while intersecting in the X-shape at the central portion of the drum 1. In addition, one rotary shaft 2 becomes a drive shaft 2A,
A driving torque of power is appropriately applied to the driving shaft 2A, and the stirring blade body 3 rotates together with the pair of rotating shafts 2.

(Example) Hereinafter, the present invention will be described with reference to illustrated examples.

The stirring blade device of the mixer A of the present invention is installed in a drum 1 in which both end portions of a substantially cylindrical peripheral wall portion 5 are closed by a pair of side wall portions 6 and is driven in a predetermined direction in the drum 1. It is made to rotate so that the cement and the aggregates such as sand, water and gravel put into the drum 1 can be agitated, and the left and right side wall portions 6 of the drum 1 can rotate on the same rotation center. A pair of relatively short rotary shafts 2 mounted as described above, and fixed to the tip portions of the pair of rotary shafts 2 and arranged horizontally between the pair of rotary shafts 2 (a pair of rotary shafts). And a stirring blade body 3 for connecting the two), one of the pair of rotary shafts 2 is a drive shaft 2A, and the other is a driven shaft 2B.
The stirring blade body 3 is configured to rotate in the drum 1 by appropriately applying a driving torque of power to the driving shaft 2A.

The drum 1 is provided with an inlet 7 for an aggregate or the like formed in an upper center of a substantially cylindrical peripheral wall 5, and an outlet 8 for discharging a concrete mortar that is agitated and kneaded is provided in a lower lower center of the peripheral wall 5. ing.

The stirring blade body 3 has a pair of mounting plates 4 fixed to the tip portions of the pair of rotary shafts 2 so as to be substantially orthogonal to the axis of the rotary shaft 2, and the tip portions of the pair of mounting plates 4. A pair of blade main bodies 9 that are fixed to each other laterally and are slidable along the inner peripheral surface of the peripheral wall portion 5 of the drum 1 and a substantially central portion in the longitudinal direction of the pair of blade main bodies 9 are connected to each other. , A reinforcing plate 10 arranged substantially orthogonal to the axis of the rotary shaft 2.
It has and.

The blade body 9 on one side is shorter than the length of the peripheral wall portion 5, is arranged closer to the side wall portion 6 on one side, and the blade body 9 on the other side is arranged.
Is shorter than the length of the peripheral wall portion 5 and is arranged closer to the other side wall portion 6. Further, the one blade body 9 and the other blade body 9 are separated from each other by 180 degrees in the rotation direction of the rotating shaft 2. It is located in the Moreover, in the one blade main body 9 arranged near the one side wall portion 6, the one side wall portion 6 has a leading end in the rotation direction of the rotary shaft 2 more than the other side wall portion 6 has a leading end portion. The other blade main body 9 formed in a twisted state so as to be disposed closer to the other side wall portion 6 has the other side wall portion 6 with the end portion of the one side wall portion 6 than the end portion of the rotary shaft. It is formed in a twisted state so as to lead in the rotational direction of 2. That is, the aggregate or the like having the one side wall portion 6 in the drum 1 formed in the crocodile is prevented by the one blade body 9
Aggregates and the like that are gradually transferred toward the center and have the other side wall 6 in the drum 1 are gradually transferred toward the center of the drum 1 by the other blade body 9 and the aggregates and the like in the drum 1 are transferred. It is configured so that it is traversed in a substantially 8-shape by both blade main bodies 9 and moves while rotating, and the movement crosses in an X-shape without any hindrance, and the kneading and kneading is further improved.

As means for mounting the stirring blade body 3 on the rotary shaft 2, for example, a convex portion 12 fitted into a mounting hole 11 formed in the center of the mounting plate 4 and a peripheral portion of the mounting hole 11 of the mounting plate 4 are provided. Attaching members, which are in close contact with each other and have a flange portion 13 extending around the periphery of the convex portion 12, are fixed to the tip of the rotary shaft 2 respectively, and the convex portion 12 of the attaching member is fitted into the attaching hole 11 of the attaching plate 4. And flange 13
This is performed by fixing the mounting plate 4 and the mounting plate 4 via bolts, nuts, rivets or the like.

The blade main body 9 includes a blade rubber mounting plate 14 having a substantially T-shaped cross section that is fixed to the tip portions of the mounting plate 4 and the reinforcing plate 10, and a substantially band plate-shaped blade rubber 15 that contacts the inner peripheral surface of the drum 1. And a blade rubber pressing plate 16 for fixing the blade rubber 15 to the blade rubber mounting plate 14, and the blade rubber 15 is sandwiched between the mounting plate 4 and the blade rubber pressing plate 16 and screwed. There is.

By the way, the specific configuration, shape, dimensions, material of the drum 1,
Specific configuration, shape, size, material of the pair of rotary shafts 2, mounting means for drum 1, material, specific configuration of stirring blade body 3, shape, size, material, specific configuration of mounting plate 4, The shape, size, material, specific configuration of the blade body 9, shape, size, material, specific configuration, shape, size, material, etc. of the reinforcing plate 10 are not limited to those shown in the drawings, but may be set freely. It is possible.

(Effects of the Invention) Therefore, according to the present invention, the drum 1 is driven and rotated in a predetermined direction in the drum 1 formed by closing both end portions of the substantially cylindrical peripheral wall portion 5 with the pair of side wall portions 6, respectively, and is put into the drum 1. A side wall portion 6 of the drum 1 in a stirring blade device for a concrete mortar mixer that stirs the mixed cement and sand, water, gravel, etc.
A pair of relatively short rotary shafts 2 mounted so as to be rotatable on the same rotation center line, respectively, and the pair of rotary shafts 2
And a stirring blade body 3 which is fixed horizontally to a pair of rotating shafts 2 and which is fixed to the respective leading end portions of the rotating shafts 2. With
A pair of mounting plates 4 arranged so as to be substantially orthogonal to the axis of the rotating shaft 2, and laterally fixed to the tip portions of the pair of mounting plates 4, and the inner circumference of the peripheral wall portion 5 of the drum 1. The pair of blade main bodies 9 that are slidable along the surface and the substantially central portions in the longitudinal direction of the pair of blade main bodies 9 are connected to each other and are arranged so as to be substantially orthogonal to the axis of the rotary shaft 2. And a reinforcing plate (10), one blade body (9) is shorter than the length of the peripheral wall portion (5) and is arranged closer to one side wall portion (6), and the other blade body (9).
Is shorter than the length of the peripheral wall portion 5 and is arranged closer to the other side wall portion 6, and the one blade main body 9 and the other blade main body 9 are positioned 180 degrees apart from each other in the rotation direction of the rotating shaft 2. In addition, the one blade main body 9 is twisted so that one side wall portion 6 has the end of the side wall 6 ahead of the other side wall portion 6 in the direction of rotation of the rotating shaft 2. The other blade main body 9 is formed in a twisted state such that the other side wall portion 6 has a waving end that is ahead of the one side wall portion 6 in the rotational direction of the rotating shaft 2. Since one of the pair of rotary shafts 2 is used as the drive shaft 2A and the drive rotary force of the power is appropriately applied to the drive shaft 2A, the pair of rotary shafts 2 are provided at both ends of the stirring blade body 3. And a relatively wide space portion where the rotary shaft 2 does not exist is provided in the central portion of the drum 1. As a result, the aggregate and the like put into the drum 1 can be moved very smoothly in the central portion of the drum 1 at the time of stirring, and a reliable and good stirring and kneading state can be obtained. Can be efficiently and reliably stirred and kneaded in a short time, and the work efficiency can be improved. That is, aggregates and the like do not become entangled with the rotary shaft arranged in the central portion of the drum as in the conventional case, and do not remain as a lump, and an extremely good stirring and kneading state of aggregates and the like can be obtained. . Furthermore, the residual aggregate and the like will not harden while remaining attached to the rotating shaft, and the handling thereof will be easy.

Further, the stirring blade body 3 can be rotated by simply rotating the drive shaft 2A with one suitable power, and the mixer A can be rotated.
Also, the stirring blade device for mixer itself can be configured very simply and can be provided at low cost.

In particular, by providing the reinforcing plate 10, the strength and rigidity of the stirring blade body 3 becomes very high, the durability is excellent, the long-term use becomes possible, and moreover, the aggregate and the like are strong and stable. It becomes possible to knead with sufficient stirring.

In addition, since the pair of mounting plates 4 are arranged so as to be substantially orthogonal to the axis of the rotating shaft 2 and the reinforcing plate 10 is arranged so as to be substantially orthogonal to the axis of the rotating shaft 2, the stirring plate is used. When the blade body 3 rotates, the mounting plate 4 and the reinforcing plate 10 can rotate in a relatively balanced manner.

Furthermore, one of the blade main bodies 9 is shorter than the length of the peripheral wall portion 5,
It is arranged closer to one side wall portion 6, the other blade main body 9 is shorter than the length of the peripheral wall portion 5, and is arranged closer to the other side wall portion 6,
The one blade main body 9 and the other blade main body 9 are arranged at positions separated by 180 degrees from each other in the rotation direction of the rotary shaft 2, and one blade main body 9 has one side wall portion 6 at the end Part is formed in a twisted state such that the other side wall part 6 is ahead of the other side wall part 6 in the rotation direction of the rotary shaft 2, and the other blade body 9 has the other side wall part 6 Since one side wall portion 6 is formed so as to be twisted so as to be ahead of the end portion in the rotation direction of the rotary shaft 2, one side wall portion 6 in the drum 1 is formed.
Aggregates and the like on the gutter can be gradually transferred toward the center of the drum 1 by the one blade main body 9, and aggregates and the like on the other side wall portion 6 in the drum 1 can be transferred to the drum by the other vane body 9 1 can be gradually transferred toward the center, and the aggregates and the like in the drum 1 are moved in a substantially 8-shape by both blade main bodies 9 while rotating, and intersect in the X-shape at the center of the drum 1. It will be possible to knead reliably and smoothly.

[Brief description of drawings]

The drawings illustrate the present invention. Fig. 1 is a partially cutaway front view of the state of being installed in a mixer, Fig. 2 is a side view of the state of being installed in a mixer, and Fig. 3 is a plan view of the state of being installed in a mixer. It is a figure. A ... mixer, 1 ... drum, 2 ... rotary shaft, 2A ...
Drive shaft, 2B ... driven shaft, 3 ... stirring blade body, 4 ... mounting plate, 5 ... peripheral wall part, 6 ... side wall part, 7 ... input port, 8
…… Discharge port, 9 …… Blade body, 10 …… Reinforcing plate, 11 …… Mounting hole, 12 …… Convex part, 13 …… Flange part, 14 …… Blade rubber mounting plate, 15 …… Blade rubber, 16 ...... Feather rubber presser plate.

Claims (1)

[Scope of utility model registration request] 1. Cement and sand, water, gravel, etc., which are driven and rotated in a predetermined direction in a drum formed by closing both end portions of a substantially cylindrical peripheral wall portion with a pair of side wall portions, respectively, and are put into the drum. In a stirring blade device for a concrete mortar mixer that stirs, a pair of relatively short rotary shafts mounted on the side wall portions of the drum so as to be rotatable on the same rotation center line, and a pair of these rotary shafts. The stirring blade body is fixed to the tip end portion and is arranged horizontally between a pair of rotating shafts. The stirring blade body is fixed to the tip end portion of each rotating shaft and A pair of mounting plates arranged so as to be substantially orthogonal to the axial center, fixed horizontally to the tip portions of the pair of mounting plates, and slidable along the inner peripheral surface of the peripheral wall of the drum. A pair of blade bodies and a pair of blade bodies in the longitudinal direction Along with the allowed to connect the central portion each other,
A reinforcing plate disposed so as to be substantially orthogonal to the axis of the rotating shaft, wherein one blade body is shorter than the length of the peripheral wall portion,
The blade body is arranged closer to one side wall portion, the other blade body is shorter than the length of the peripheral wall portion, and is arranged closer to the other side wall portion, and the one blade body and the other blade body are arranged in the rotational direction of the rotary shaft. They are placed 180 degrees apart from each other, and one of the blade bodies is twisted so that one side wall end of the blade leads the other side wall end in the direction of rotation of the rotating shaft. The other blade body is twisted so that the side wall end of the other side wall is ahead of the end side of the one side wall in the rotational direction of the rotary shaft. An agitating blade device for a mixer, wherein one of the pair of rotary shafts is used as a drive shaft, and a drive rotary force of power is appropriately applied to the drive shaft.