JP5465063B2 - Mixer prevention structure - Google Patents

Description

  The present invention relates to an adhesion preventing structure for preventing adhesion of a mixed material to a mixing tank of a mixer for mixing and kneading concrete and other mixed materials.

Conventionally, mixers for mixing materials with mixing blades are widely known and used for various purposes. For example, what was described in patent document 1 is an example.
The mixer described in Patent Document 1 is a concrete mixer that is used in producing ready-mixed concrete by kneading and mixing materials such as gravel, sand, cement, and water. This mixer is known as a biaxial concrete mixer, and a pair of drive shafts on both sides are rotatably arranged in parallel in a required mixing tank. The drive shafts are interrogated radially at predetermined pitches alternately through the substantially spiral mounting arms.
By rotating the drive shaft, the mixing blade moves the material up and down, left and right while moving it throughout the mixing tank, and mixes and kneads the material by its screw effect and shearing action to produce ready-mixed concrete. is there.

In such a mixer, the material to be mixed remains in the mixing tank. The material attached to the inner surface of the mixing tank of the mixer is solidified in the attached state and hinders the driving of the mixer.
For this reason, the mixing tank of the mixer is washed at the end of the mixing operation. However, if the material is viscous or the solidification progresses rapidly, the amount of attachment becomes large, and the removal is cleaned. The work is very troublesome and time consuming.

For example, in the concrete mixer described in Patent Document 1, a lining layer made of a material that hardly adheres to the inner peripheral surface of the mixing tank of the mixer is formed in a lining shape.
Thereby, attachment of the mixed material to the inner peripheral surface of the mixing tank of the mixer can be reduced as compared with the conventional mixer, and the mixing tank for removing the attached material can be easily cleaned.

JP 2008-290320 A

However, even with the above-described concrete mixer, even if there is an effect in reducing the amount of adhering mixed material, it has not yet been sufficient to eliminate the adhering.
Even if a lining material that is difficult to attach as in the conventional example is used, it is difficult to remove the attached material when mixing a highly adherent viscous material, and there is no other way to remove it by manual cleaning. .
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a mixer anti-attachment structure capable of preventing the material from adhering to the mixing tank of the mixer for mixing the material and easily removing the adhering material once attached. .

In order to solve the above-described problems, the present invention provides a mixing tank and a sticking prevention structure provided in a mixer having a mixing blade that is rotatably provided inside the mixing tank and mixes materials. A vibration source that generates vibration, a vibration member that holds the vibration source and transmits vibration of the vibration source, and an outer end of the mixing tank that is provided to penetrate from the outside of the mixing tank to the inside Is connected to the vibrating member and transmits the vibration into the mixing tank, and is connected to the inner end of the mixing tank of the transmission shaft and is installed on the inner surface of the mixing tank. The vibration member is provided, and the vibration member is vibrated by a vibration source to prevent the material from attaching to the inside of the mixing tank.
In addition, a packing is provided as a cushioning material between the vibrating member and the mixing tank.

  According to the present invention, the adhering of the mixed material to the mixing tank can be prevented, and the adhering material once attached can be easily removed, so that the manual cleaning of the mixer after the operation is dramatically reduced. Only the mixing blade portion needs to be washed intensively, the cleaning work can be easily performed, and the work can be completed in a short working time.

  Since the amount attached to the mixing tank is reduced as compared with the conventional case, the weight control of the mixed material can be strictly performed. When the mixed material is attached, the weight of the material weighed before feeding into the mixer does not match the weight of the material discharged from the mixer after mixing, and an error in the attached weight occurs. According to the present invention, the attachment is reduced, the weight error of the mixed material is reduced, the mixture can be managed with the measured weight, and the quality of the mixture can be maintained.

A perspective view of the mixer. The perspective view of the mixing tank part of the mixer provided with the attachment prevention structure of this invention. The longitudinal cross-sectional view of the mixing tank part of FIG. The enlarged view of the principal part of FIG. Explanatory drawing which showed the structure state of the adhesion prevention means in the perspective state.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective reference view of the mixer. This drawing does not show the attachment preventing structure of the present invention.
FIG. 2 is a perspective view of the mixing tank portion of the mixer provided with the adhesion preventing structure of the present invention.
FIG. 3 is a longitudinal sectional view of the embodiment shown in FIG.
FIG. 4 is an enlarged view of the main part of FIG.
As shown in FIG. 1, the mixer 26 is open at the top and can be charged with a material. The mixing tank 1 that forms the main body of the mixer 26 is a container for storing the charged material. Two mixing blades 2 penetrating through the front wall 9 which is two bearing surfaces facing each other are arranged in parallel.

The mixing blade 2 is rotated by the power of the rotary motor and is provided in the mixing tank 1, and is constituted by a helical shaft 6 formed in a spiral shape and a helical blade 7 provided on the outer periphery of the helical shaft 6 and stirring the material. ing.
As shown in FIG. 2, the mixing tank 1 is configured such that the bottom portion 19 is a curved surface, and the side wall 8 that forms the side surface portion 20 is vertical. This side wall 8 is a vertical surface, does not move the mixing blades, and does not scrape the material by the spiral blade 7, so that it becomes a place where the mixed material is easily attached and is difficult to peel off. As a structure, an adhesion preventing means 21 is provided.

FIG. 5 is an explanatory view showing a configuration state of the attachment preventing means 21 in a perspective state.
The attachment preventing means 21 is provided outside the mixing tank 1 and generates a vibration. The vibration source 11 is attached to the vibration source 11. The vibration member 13 vibrates in response to the vibration of the drive source 11. A transmission shaft 14 that transmits the vibration of the member 13 to the inside of the mixing tank 1 and a vibration member 15 that is connected to the transmission shaft 14 and provided on the inner side of the vertical surface of the mixing tank 1 are provided.

The vibration source 11 is provided outside the mixer 26. In the present embodiment, a vibrator that generates vibration by driving a built-in motor is used as the vibration source 11. The drive source 11 is directly attached to the vibration member 12 by bolting.
The vibration member 12 is provided outside the mixer 26 and has a plate shape that matches the shape of the outer periphery of the mixing tank 1 provided in the mixer 26. A packing a <b> 16 is provided between the vibration member 12 and the mixing tank 1. The packing is made of rubber, which is an elastic material, and is provided as a cushioning material so that the vibration of the vibration member 12 is not transmitted to the mixer 26.

The vibration member 15 provided inside the mixing tank 1 of the mixer 26 is attached so that the inner surface side matches the lining material 10 provided inside the curved surface portion of the mixing tank 1 so that no step is generated. It is formed in the shape of a plate that matches the shape of the inner periphery of the tank 1.
As shown in FIG. 2, according to this embodiment, the vibrating member 15 is provided inside the side wall 8 of the mixing tank 1, and two pieces are arranged in parallel on the side wall 8 a on one side of the mixing tank 1. Similarly, two sheets are arranged in parallel on the opposite side wall 8b.

A rod-shaped transmission shaft 14 that protrudes to the outside of the mixer is joined to the surface of the vibrating member 15 on the mixing tank 1 side. In the embodiment shown in the figure, the base portion of the transmission shaft 14 is joined to the vibration member 15 by welding.
A screw 24 is provided at the tip 23 of the transmission shaft 14 on the vibration member 12 side so that a nut can be screwed. The screw 24 passes through a through hole 22 provided in the mixing tank 1 and extends to the outside of the mixer 26. Part 23 is arranged.
A packing b17 is provided between the vibrating member 15 and the mixing tank 1. The packing is formed of rubber, which is an elastic material, and prevents the mixed material from flowing out of the through hole 22 and is provided as a buffer material so that the vibration of the vibration member 15 is not transmitted to the mixer 26.

Further, a packing c25 for preventing intrusion of the mixed material is provided on the entire circumference of the surface of the vibration member 15 on the mixing tank 1 side. Thereby, the mixed material does not enter between the vibrating member 15 and the mixing tank 1, thereby preventing abnormal noise due to vibration and suppression of vibration.
The packing b17 is sandwiched between the vibrating member 15 and the mixing tank 1, the transmission shaft 14 is projected outwardly from the mixing tank 1 through the through hole 22 of the mixing tank 1, and the mixing tank 1 and the vibration member 13 are interposed between them. The attachment preventing means 21 is attached to the mixing tank 1 by tightening the attachment nut 18 to the screw 24 of the tip 23 of the transmission shaft 14 with the packing a16 sandwiched therebetween.

Next, the operation of the present invention will be described with reference to examples.
When mixing the material with the mixer 26, the mixer 26 is driven to rotate the mixing blade 2 to mix the mixed material. At this time, the mixed material is attached to the inside of the side wall 8 of the mixing tank 1 of the mixer 26. In order to prevent this, the attachment preventing means 21 is driven. In this embodiment, the attachment preventing means 21 is driven during a period in which the mixer 26 is mixing materials.
When the introduction of the mixed material into the mixing tank 1 of the mixer 26 is started, the adhesion preventing means 21 attached to the mixing tank 1 starts to operate. At that time, the vibrator 12 provided as the vibration source 11 is activated to generate vibration.

Since the vibration source 11 is directly attached to the vibration member 13, the vibration of the vibration source 11 is directly transmitted to the vibration member 13.
The vibration generated in the vibration member 13 provided outside the mixer 26 is transmitted to the vibration member 15 provided inside the mixer 26 via the transmission shaft 14.
One end of the transmission shaft 14 is welded to the vibration member 15 and the other end is attached to the vibration member 13 by a mounting nut 18, so that the vibration of the vibration member 13 is reliably transmitted to the vibration member 15. It will be.

When the vibration member 15 vibrates inside the mixing tank 1, the mixed material to be attached to the inside of the vibration member 15 can be screened off and not attached. Further, even if there is a mixed material already attached, it will not continue to be attached, and by dropping it, it is possible to prevent the mixture from attaching to the side wall 8 of the mixing tank 1.
At this time, the mixing tank 1 is not in direct contact with the vibration member 13 and the vibration member 15 that vibrate by the packing a <b> 16 and the packing b <b> 17, so that vibration is not transmitted to the mixing tank 1. Thereby, the vibration energy of the vibration source is transmitted to the vibration member 15 without being attenuated, and the mixing tank 1 is vibrated so that no abnormal noise is generated from the mixer.

In the above embodiment, the vibration member 15 may be formed of a normal steel material, but is preferably formed of a material to which the mixed material is difficult to attach. For example, it is possible to further contribute to the prevention of adhesion when formed of a stainless material having a small surface roughness or a resin material having a slippery surface.
Further, when the vibration member 15 is attached and replaced, the vibration member 15 is lighter when the resin material is used than the steel material or the stainless steel material, thereby contributing to improvement in workability.
In addition, regarding the resistance to chemical components of the chemicals contained in the mixed material, the deterioration due to the chemicals is reduced and the length of the vibration member 15 is reduced by forming the material with a stainless steel or a resin material as compared with a normal steel material. It can contribute to life extension.

In the mixer 26 in the embodiment, the configuration of the mixing blade 2 provided in the mixing tank 1 is composed of a helical shaft 6 provided in a spiral shape and a helical blade 7 provided in the helical shaft 6. However, the configuration is not limited to this. For example, the configuration of the mixing blade 2 is provided at a mixing shaft that is made rotatable by the power of a rotary motor and is provided in the mixing tank 1, an arm that is provided radially on the outer periphery of the mixing shaft, and an outer tip of the arm. Even if the mixer is composed of a blade that stirs the material, the present invention exhibits the same effect and can prevent the mixing tank from being attached.

DESCRIPTION OF SYMBOLS 1 Mixing tank 2 Mixing blade 11 Vibration source 13 Excitation member 14 Transmission shaft 15 Vibration member 22 Through-hole 26 Mixer

Claims (2)

In an anti-attachment structure provided in a mixing tank and a mixer having a mixing blade that is rotatably provided inside the mixing tank and mixes materials, a vibration source that is provided outside the mixing tank and generates vibration, and the vibration A vibrating member that holds the source and transmits the vibration of the vibration source, and a mixing tank that penetrates from the outside to the inside of the mixing tank and is connected to the vibrating member at the outer end of the mixing tank A transmission shaft that transmits inward, and a vibration member that is connected to the inner end of the mixing tank of the transmission shaft and that is provided inward of the vertical surface of the mixing tank and is installed on the inner surface of the mixing tank. A structure for preventing attachment of a mixer, wherein the material is prevented from adhering to the inside of the mixing tank by vibrating with a source. The mixer attachment prevention structure according to claim 1, further comprising a packing as a cushioning material between the vibration member and the mixing tank.

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