KR102597898B1 - Concrete mixer - Google Patents

Abstract

The present invention relates to a concrete mixer, comprising: a tank portion providing a space for mixing concrete materials; and a mixer unit disposed in the mixing space to mix the ingredients.

Description

Concrete mixer {CONCRETE MIXER}

The present invention relates to a concrete mixer capable of producing concrete by mixing aggregate such as cement, sand, gravel, stone chips, and water.

In general, concrete is used as an important material when constructing buildings.

Concrete is made with aggregates such as sand and gravel using a hydration reaction in which cement reacts with water and hardens. Concrete initially has a gel-like shape containing moisture, but when it completely hardens, it becomes hard like a stone.

During the process of making concrete, the strength and slump (softness of concrete) of concrete can be controlled by appropriately adjusting the combination of sand, gravel, and cement.

Meanwhile, automated equipment is required to produce concrete in large quantities.

One of the currently widely used methods is to install a tank for concrete mixing, install a mixer to mix concrete materials inside the tank, and automatically supply each material to the mixer to produce concrete. At the same time, the ready-mix concrete is put into a vehicle that can be transported to the work site.

At this time, the mixer is used to add sand, gravel, cement, water, and admixtures and mix them. Mixers can be classified into mixers with two axes and mixers with one axis.

Mixers with one shaft and mixers with two shafts both have excellent mixing efficiency for large concrete, but the concrete bounces on the inner wall of the tank and sticks in a coated state. If this is not removed, there is a problem of significant material loss.

In addition, materials located in the inner center of the tank, that is, close to the mixer, are located within the mixer's influence range and can be mixed well, but materials located on the inner side or bottom of the tank are located outside the mixer's influence range and are not mixed well. There is a problem that does not exist.

In particular, there is a problem that mixing efficiency of materials is lowered in the case of a mixer with one axis compared to a mixer with two axis.

Therefore, there is an urgent need to develop a product that can improve the mixing efficiency of materials by transferring materials located on the inner side or bottom of the tank to the mixer, regardless of the number or location of axes.

Meanwhile, the above-mentioned background technology is technical information that the inventor possessed for deriving the present invention or acquired in the process of deriving the present invention, and cannot necessarily be said to be known technology disclosed to the general public before filing the application for the present invention. .

Korean Patent No. 10-0757953

The present invention can produce concrete by mixing aggregates such as cement, sand, gravel, and stone chips and water, and prevents concrete from accumulating and sticking by scraping the inner wall of the tank that provides a mixing space for concrete materials. The purpose is to provide a concrete mixer that can improve mixing efficiency by moving concrete materials to the mix blade during the scraping process.

Another purpose is to provide a concrete mixer that can further improve the mixing efficiency of concrete materials by pumping the concrete materials deposited on the bottom of the tank to the mixing blade.

The technical problem of the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

A concrete mixer according to an embodiment of the present invention includes a tank portion providing a space for mixing concrete materials; and a mixer unit disposed in the mixing space to mix the ingredients.

And, it further includes a rotation drive unit that rotates the mixer unit so that the ingredients are mixed.

In addition, it further includes a scraper unit for scraping the material located on the inner wall of the tank unit, wherein the scraper unit is a scraper having serrated scraping blades formed at regular intervals for scraping the material on one surface facing the inner wall of the tank unit. ; a first lifting cylinder disposed outside the upper side of the tank unit, repeatedly raising and lowering the scraper to scrape the inner wall of the tank unit as the scraping blade is raised, and being transported by the position variable unit; and a vibrator that transmits vibration to the scraper through the piston of the first lifting cylinder.

And, it further includes a transfer part that operates together with the scraper unit to transfer the material located on the side of the tank unit to the mixer unit side, wherein the transfer unit includes a vertical part coupled to the other surface of the scraper; a horizontal portion bent in a right angle direction at the bottom of the vertical portion; And a push part that connects the top of the vertical part and the end of the horizontal part to form an inclined surface, and moves up and down together with the scraper to push the material located on the side of the tank part toward the center of the tank part, and the scraper and the transfer part include They are arranged to be connected to each other, and a plurality of first passage holes and second passage holes are formed at regular intervals along the longitudinal direction for allowing the material located on the side of the tank unit to pass toward the mixer unit, and the first passage hole and the second passage hole are formed at regular intervals along the longitudinal direction. 2 The pass hole is formed in an inclined shape to transfer the material to the mixing blade, and the material contained in the first pass hole and the second pass hole is discharged while the scraper and the transfer part are raised to the upper side of the tank part. It further includes a discharge unit.

In addition, the discharge unit includes an air injection hose installed in each of the first passing holes; and an air injection unit that injects air into the first passage hole and the second passage hole through the air injection hose to discharge the material.

And, it further includes a position variable part that transfers the scraper unit in both directions to position the scraper unit and the transfer unit at the upper part of the tank unit or to separate the scraper unit and the transfer unit from the upper part of the tank unit.

In addition, it further includes a raised part that lifts the material located in the lower area of the tank unit so that it acts on the mixer unit, and the raised parts are spaced apart from each other at regular intervals in the horizontal direction, as long as vertical guide holes are formed on surfaces facing each other. A pair of vertical parts are each connected to the lower end of the vertical parts, and an additional guide hole connected to the vertical guide hole is formed on a surface facing each other, and when the tank is put into the mixing space of the tank part by a lowering operation, the tank A base portion that is supported on the bottom of the unit and bent at a certain level and includes a pair of bent portions that initially contact the bottom of the tank portion and a connection portion that connects the upper side of the vertical portion in the horizontal direction; a second lifting cylinder that is coupled to the connection part outside the upper side of the tank unit and lowers the base unit into the mixing space and then repeatedly lifts the base unit for a preset time; By floating the material located in the lower area of the tank part with the space between the vertical parts closed, one side and the other side are jointly accommodated in the vertical guide hole and the additional guide hole, and the lower part is in the additional guide hole. A spoon part that is guided and bent at a certain level; It is connected to the upper side of the spoon portion from the outside of the upper side of the tank portion, and when the base portion is inserted into the mixing space and the bent portion is bent, the spoon portion is lowered and the lower side is bent to a certain level by an additional guide hole, thereby creating a space between the vertical portions. closed, and the spoon part rises at the same speed as the second elevating cylinder so that the spoon part scoops up the material located in the lower area of the tank part, and then follows the second elevating cylinder to lower the spoon part into the mixing space. a third lifting cylinder; A wire whose lower end is coupled to the lower side of the spoon portion and whose upper side protrudes toward the upper side of the tank portion; a drum on which the wire is wound or unwound; And when the second lifting cylinder and the third lifting cylinder respectively lower the base part and the spoon part, the drum rotates in the wire unwinding direction, and the second lifting cylinder and the third lifting cylinder move the base part and the spoon part, respectively. It includes an elevating drive unit that rotates the drum in the wire winding direction when raised to maintain the bent portion and the lower side of the spoon portion in a bent state.

And, it further includes a shock absorption module that elastically supports the bottom of the tank portion.

According to one aspect of the present invention described above, concrete can be produced by mixing aggregates such as cement, sand, gravel, stone chips, and water, and the concrete is accumulated by scraping the inner wall of the tank that provides a mixing space for the concrete materials. and sticking, and has the effect of improving mixing efficiency by moving concrete materials to the mixing blade during the scraping process.

In addition, the concrete material deposited on the bottom of the tank is pumped toward the mixing blade, which has the effect of further improving the mixing efficiency of the concrete material.

The effects of the present invention are not limited to the effects mentioned above, and various effects may be included within the scope apparent to those skilled in the art from the contents described below.

1 is a diagram showing a concrete mixer according to an embodiment of the present invention.
Figure 2 is a side cross-sectional view showing an example in which a scraper and a position variable part are applied to a concrete mixer according to an embodiment of the present invention.
Figure 3 is a front cross-sectional view showing an example in which a scraper and a position variable part are applied to a concrete mixer according to an embodiment of the present invention.
Figure 4 is a cross-sectional view showing a scraper, a transfer part, and a discharge part applied to a concrete mixer according to an embodiment of the present invention.
Figure 5 is a partially exploded perspective view showing an elevation applied to a concrete mixer according to an embodiment of the present invention.
Figure 6 is a front view showing an elevation applied to a concrete mixer according to an embodiment of the present invention.
Figure 7 is a side cross-sectional view showing the operation of the lifting part applied to the concrete mixer according to an embodiment of the present invention.

The detailed description of the present invention described below refers to the accompanying drawings, which show by way of example specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different from one another but are not necessarily mutually exclusive. For example, specific shapes, structures and characteristics described herein may be implemented in one embodiment without departing from the spirit and scope of the invention. Additionally, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the detailed description that follows is not intended to be taken in a limiting sense, and the scope of the invention is limited only by the appended claims, together with all equivalents to what those claims assert, if properly described. Similar reference numbers in the drawings refer to identical or similar functions across various aspects.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

The concrete mixer 1 according to an embodiment of the present invention includes a tank unit 10, a mixer unit 20, a rotation drive unit 30, a scraper unit 40, a transfer unit 50, and a discharge unit. It may include at least one of a portion 60, a position variable portion 70, an elevation portion 80, and a shock absorption module 90.

A mixing space for mixing concrete materials is formed inside the tank unit 10.

At this time, concrete materials can be applied as cement, aggregates such as sand, gravel, stone chips, and water.

An inlet for introducing the above-mentioned materials is formed on the upper surface of the tank unit 10, and a discharge pipe 11 is installed on the lower side of the tank unit 10 for discharging the concrete completed by mixing.

And, on the upper surface of the tank unit 10, a plurality of entrances and exits through which the scraper unit 40, the transfer unit 50, and the lift unit 80, which will be described later, enter and exit are formed at regular intervals.

A valve is installed in the discharge pipe 11. The valve opens or closes the internal passage of the discharge pipe 11 by rotating. Therefore, when mixing the materials, the internal passage of the discharge pipe 11 is closed with a valve, and when the concrete is completed, the valve is opened to discharge it.

The mixer unit 20 is configured to mix ingredients.

A certain portion of the mixer unit 20 is disposed in the center of the mixing space, and the remaining portion protrudes outward through the tank unit 10, and includes a rotation shaft 21 and a rotation axis coupled to the rotation drive unit 30, which will be described later. It is installed on the circumferential surface of (21) and may include a mixing blade (22) that mixes the materials while rotating with the rotating shaft (21).

At this time, packing to prevent material leakage may be installed in the portion of the tank portion 10 through which the rotating shaft 21 passes.

In addition, it is revealed that the shape of the mixing blade 22 is not limited to the shape shown in FIG. 2, and that it can be applied in any one of commercialized shapes that can efficiently mix materials, such as a twist shape.

In addition, the mixer unit 20 may be installed in plural numbers to be evenly distributed in the tank unit 10 to improve mixing efficiency of materials.

In addition, although the drawing shows an example in which the mixer unit 20 is installed horizontally, it is not limited to this and can also be installed in a vertical form.

The rotation drive unit 30 is arranged to be spaced apart from each other at a predetermined distance on one side of the tank unit 10.

The rotation drive unit 30 may be formed as a motor.

The motor shaft of the rotation drive unit 30 is coupled to the rotation shaft 21 through a coupler.

The rotation drive unit 30 continuously rotates the rotation shaft 21 in the forward or reverse direction so that the mixing blade 22 mixes the materials.

Meanwhile, the scraper unit 40 is configured to scrape material located on the inner wall of the tank unit 10.

The scraper unit 40 can be easily applied to the tank unit 10 having a rectangular box shape, that is, the wall is vertical.

At this time, the scraper unit 40 may be applied as one piece or may be applied in the same number as the number of inner walls of the tank unit 10.

Since the tank unit 10 includes four inner walls, when the scraper unit 40 is applied as one, the operator sequentially moves the scraper unit 40 to each wall of the tank unit 10 to scrape the tank unit. Just scrape each wall in (10).

At this time, the scraper unit 40 may be sequentially moved to each wall of the tank unit 10 while being mounted on a vehicle including a holder.

The truck may be formed in the shape of a square plate with rollers installed at each corner of the bottom that roll along the ground.

Additionally, the holder may include a vertical portion formed at the bottom with a flange bolted to the upper surface of the vehicle, and a horizontal portion bent in a right angle direction at the top of the vertical portion.

The holder consists of a pair of two holders and may include flanges for bolting on surfaces facing each other. One holder may be coupled to the end of the horizontal portion, and the other holder may be bolted to the holder coupled to the horizontal portion.

The holder may be formed to have the same cross-sectional shape as the first lifting cylinder 42. For example, when the first lifting cylinder 42 is formed to have a circular cross-sectional shape, the holder may be formed to have a semicircular shape or a curved shape. One holder surrounds 1/2 of the first lifting cylinder 42, and the other holder wraps the remaining 1/2 of the first lifting cylinder 42. Due to this, the flanges of the holders also come into contact with each other.

In this way, the pair of holders each surround the first lifting cylinder 42 and are coupled to each other as the flanges are bolted to fix the first lifting cylinder 42.

When four scraper units 40 are applied, equal to the number of walls of the tank unit 10, the scraper 41 may be formed to have the same size as each wall of the tank unit 10.

In addition, the first lifting cylinder 42 that operates the scraper unit 40 can be programmed to operate alternately at regular time intervals to prevent the scrapers 41 from colliding with each other.

Additionally, the scraper unit 40 may be operated while the mixer unit 20 is mixing the ingredients, or may be operated before the mixer unit 20 is mixing the ingredients or after mixing is completed.

In particular, the scraper unit 40 scrapes away unnecessary concrete coating adhered to the inner wall of the tank unit 10 so that it can be mixed with the material, thereby preventing material loss.

Additionally, it prevents the fixed concrete from taking up unnecessary volume in the mixing space.

To this end, the scraper unit 40 may include a scraper 41, at least one of the first lifting cylinder 42, and the vibrator 43.

The scraper 41 has sawtooth-shaped scraping blades 411 formed at regular intervals on one surface facing the inner wall of the tank unit 10.

The first lifting cylinder 42 is disposed outside the upper side of the tank unit 10.

The first lifting cylinder 42 may be formed as a hydraulic cylinder that operates by hydraulic pressure.

The first lifting cylinder 42 repeatedly lifts the scraper 41 at preset time intervals.

The scraping blade 411 is repeatedly lifted and lowered together with the scraper 41 to scrape off concrete and concrete materials such as sand, gravel, stone fragments, etc. adhered to the inner wall of the tank unit 10, and separate them from the inner wall.

The vibrator 43 is detachably coupled to the piston of the first lifting cylinder 42 through a coupling tool such as a clamp or flange.

The vibration generated from the vibrator 43 is transmitted to the scraper 41 along the piston.

That is, the scraping blade 411 scrapes the inner wall surface of the tank unit 10 while being vibrated by the vibrator 43. As a result, concrete and concrete materials such as sand, gravel, stone fragments, etc. adhered to the inner wall surface can be efficiently scraped with the scraping blade 411 and separated from the inner wall surface.

The vibrator 43 is coupled to the piston of the first lifting cylinder 42 so that the scraper 41 is placed in a position that is not accommodated inside the tank unit 10 when the scraper 41 is lowered by the first lifting cylinder 42.

Meanwhile, the transfer unit 50 operates together with the scraper unit 40 to transfer the material located on the side of the tank unit 10 toward the mixing blade 22 disposed at the center of the mixing space.

To this end, the transfer unit 50 may include at least one of a vertical unit 51, a horizontal unit 52, and a push unit 53. At this time, the transfer unit 50 including this configuration is formed in a substantially right-triangular block shape.

The vertical portions 51 are each coupled to the other surface of the scraper 41.

The horizontal portion 52 is bent at a right angle at the bottom of the vertical portion 51 and faces the bottom surface of the tank portion 10.

The push part 53 connects the top of the vertical part 51 and the end of the horizontal part 52 to form an inclined surface.

The push part 53 is arranged to face the rotation axis 21. Since this push part 53 forms an inclined surface, it is raised and lowered together with the scraper 41 by the driving of the first lifting cylinder 42, and moves the material located on the side of the tank part 10 to the central side of the tank part 10. Push it in the direction of the mixing blade (22) placed on.

Because of this, the materials spread in the mixing space of the tank unit 10 can be transferred to the mixing blade 22 so that the materials are evenly mixed.

Additionally, the scraper 41 and the transfer unit 50 are arranged to be connected to each other and include a plurality of first passage holes ( 412) and second passing holes 511 are formed at regular intervals along the longitudinal direction.

At this time, the first through hole 412 and the second through hole 511 are formed at an angle to allow the material to flow toward the mixing blade 22.

The discharge unit 60 is configured to discharge the material contained in the first through hole 412 and the second through hole 511 while the scraper 41 and the transfer section 50 are raised to the upper side of the tank section 10. am.

To this end, the discharge unit 60 may include an air injection hose 61 and an air injection unit 62.

The air injection hose 61 is installed in each of the first passing holes 412. At this time, a certain area of the air injection hose 61 may be accommodated in the first passage hole 412.

The air injection hoses 61 are connected to each other through one main pipe 63.

The air injection unit 62 may be formed of a product that can spray compressed air, such as an air compressor.

The air injection unit 62 supplies compressed air to the inner space of the main pipe 63. The compressed air supplied to the inner space of the main pipe 63 is branched and supplied to the air injection hoses 61.

In addition, the air supplied to each of the air injection hoses 61 sequentially passes through the first through hole 412 and the second through hole 511 and is discharged to the outside, and in the process, the first through hole 412 And the material contained in the second passage hole 511 is discharged to the outside.

Through this discharge portion 60, the first passage hole 412 and the second passage hole 511 can be prevented from being blocked.

Meanwhile, the position variable part 70 is disposed outside the upper side of the tank part 10.

The position variable parts 70 are respectively coupled to the first lifting cylinder 42 and may be formed as a linear cylinder or a rodless cylinder.

The position variable part 70 is installed horizontally on a separate vertical support.

The piston of the position variable part 70 is coupled to the first lifting cylinder 42.

Flanges that are bolted to each other may be formed on the piston of the position variable portion 70 and the first elevating cylinder.

The position variable unit 70 transports the first lifting cylinder 42 in both directions. That is, the scraper unit 40 and the transfer unit 50 are positioned on the upper part of the tank unit 10 by the operation of the position variable unit 70, or the scraper unit 40 and the transfer unit 50 are positioned on the tank unit. It can be removed from the top of (10).

Therefore, when it is desired to use the scraper unit 40 and the transfer unit 50, the scraper unit 40 and the transfer unit 50 are transferred to the upper side of the tank unit 10 through the position variable unit 70, and then the first The scraper 41 and the transfer unit 50 can be repeatedly raised and lowered through the lifting cylinder 42.

Then, after the mixing of the materials is completed, the scraper unit 40 and the transfer unit 50 can be removed from the upper part of the tank unit 10 through the position variable unit 70.

In addition, when applying the raising part 80, which will be described later, to the tank part 10, the scraper part 40 is separated from the tank part 10 by the position variable part 70, and then the raising part 80 is installed. It can be applied to the tank part (10).

Meanwhile, the raising part 80 is configured to raise the material that has sunk in the lower area of the tank part 10 so that it acts on the mixer part 20.

At this time, the raising portion 80 may be applied in plural numbers, and may be arranged to be spaced apart from each other at regular intervals and evenly distributed around the mixing blade 22.

The lifting part 80 may be transferred to the upper side of the tank part 10 or separated from the tank part 10 through the same linear cylinder or rodless cylinder as the position variable part 70 described above.

This raised part 80 includes a base part 81, a second lifting cylinder 82, a spoon part 83, a third lifting cylinder 84, a wire 85, a drum 86, and It may include at least one of the elevator shaft eastern parts 87.

The base portion 81 may include at least one of a vertical portion 811, a bent portion 812, and a connecting portion 813.

The vertical portions 811 are composed of two pairs and are arranged at regular intervals in the horizontal direction.

The vertical portions 811 are each arranged vertically, and vertical guide holes 811a are formed on surfaces facing each other.

The vertical guide hole 811a guides the spoon portion 83, which will be described later, to rise and fall in the vertical direction.

The bent portions 812 are composed of two pairs and are respectively connected to the lower end of the vertical portion 811.

The bent portions 812 are each arranged in a curved or diagonal shape, and an additional guide hole 812a connected to the vertical guide hole 811a is formed on the surfaces facing each other.

When the bent portion 812 is formed in a curved shape, the additional guide hole 812a is formed in a curved shape, and when the bent portion 812 is formed in a diagonal shape, the additional guide hole 812a is formed in a diagonal shape.

The vertical portion 811 and the bent portion 812 are made of an elastic material. In particular, the vertical portion 811 is on the bottom surface of the tank portion 10 when it is put into the mixing space of the tank portion 10 through a lowering operation. It is supported and bent to a certain level.

At this time, the pair of vertical portions 811 are connected by a bending prevention bar 814. The bending prevention bar 814 maintains the gap between the pair of vertical portions 811 without bending when the bent portion 812 is bent.

The anti-bending bars 814 may be applied in plural numbers and installed to be spaced apart from each other at regular intervals along the vertical direction of the vertical portions 811.

One side and the other side of the connection portion 813 are respectively coupled to the upper side of the vertical portion 811.

Because of this, the additional connection part 813 connects the upper end of the vertical part 811 in the horizontal direction.

A coupling plate 8131 for coupling with the second lifting cylinder 82 is formed in the connection portion 813.

The second lifting cylinder 82 may be formed as a hydraulic cylinder that operates by hydraulic pressure.

The second lifting cylinder 82 is disposed outside the upper side of the tank unit 10.

The piston of the second lifting cylinder 82 is bolted or welded to the coupling plate 8131 to repeatedly elevate the base portion 81 for a preset time.

At this time, the second lifting cylinder 82 may be programmed to operate together with the rotation drive unit 30 or to stop operating.

The spoon portion 83 is configured to scoop up the material located in the lower area of the tank portion 10 while closing the space between the vertical portions 811.

The spoon portion 83 may be formed of an elastic material. One side and the other side of the spoon portion 83 are jointly accommodated in the vertical guide hole 811a and the additional guide hole 812a.

At this time, the upper area 832 of the spoon part 83 is accommodated in the vertical guide hole 811a and is not bent, and the lower area 833 of the spoon part 83 is guided by the additional guide hole 812a and is maintained at a certain level. It bends to

When the spoon portion 83 is bent, it has an approximately “L” shape. That is, the spoon part 83 has a spoon shape that can scoop up the material located in the lower area 833 of the tank part 10.

An additional coupling plate 831 is formed on the upper side of the spoon part 83 for coupling with the third lifting cylinder 84.

A ring (not shown) to which the wire 85 is coupled may be formed on the lower side of the spoon portion 83.

The third lifting cylinder 84 may be formed as a hydraulic cylinder that operates by hydraulic pressure.

The third lifting cylinder 84 is disposed outside the upper side of the tank unit 10 and is spaced at a predetermined distance to one side of the second lifting cylinder 82.

The third lifting cylinder 84 is disposed outside the upper side of the tank part 10, the piston of the third lifting cylinder 84 is bolted or welded to the additional coupling plate 831, and the base part 81 is connected to the mixing plate 831. When the bent portion 812 is inserted into the space and bent while supported on the bottom surface of the tank portion 10, the spoon portion 83 is lowered.

As a result, the spoon portion 83 descends from the bottom along the vertical guide hole 811a.

Additionally, since the spoon portion 83 is made of an elastic material, its lower side is naturally bent as it descends along the additional guide hole 812a.

Additionally, the portion of the spoon portion 83 accommodated in the vertical guide hole 811a is not bent.

The third lifting cylinder 84 is configured to raise the spoon part 83 at the same speed as the second lifting cylinder 82 so that the spoon part 83 lifts the material located in the lower area of the tank part 10.

That is, the base part 81 and the spoon part 83 are raised at the same speed by the second lifting cylinder 82 and the third lifting cylinder 84, respectively, and in the process, the spoon part 83 is raised to the tank part ( The material that has settled in the lower area of 10) comes to mind.

And, due to the rotation of the rotating shaft 21 and the mixing blade 22, the material raised by the spoon portion 83 is sucked toward the mixing blade 22. Accordingly, the material raised by the spoon portion 83 is also mixed by the mixing blade 22.

Additionally, the base portion 81 and the spoon portion 83 are raised to a height protruding toward the upper side of the tank portion 10 by the second lifting cylinder 82 and the third lifting cylinder 84, respectively, and then raised again. It goes down.

At this time, in the concrete mixer 1 according to an embodiment of the present invention, the second elevating cylinder 82 takes precedence to lower the base part 81, and the third elevating cylinder 84 follows to lower the spoon part 83. is lowered, and the second lifting cylinder 82 and the third lifting cylinder 84 are programmed to simultaneously raise the base part 81 and the spoon part 83.

Therefore, the base part 81 is lowered first, and the bent part 812 is first supported on the bottom surface of the tank part 10 and bent to a certain level, and then the spoon part 83 is lowered so that the lower part is bent to a certain level. It is bent to form a spoon shape.

In other words, the base portion 81 is formed in a roughly frame shape by a combination of the vertical portion 811, the bent portion 812, the connecting portion 813, and the additional connecting portion 813, so that when lowered, the base portion 81 is formed into a frame shape. Resistance to the tank can be minimized, and the pair of bent portions 812 can be easily bent by the bottom surface of the tank portion 10.

In addition, the spoon portion 83 is formed to have a thinner thickness than the vertical portion 811 and the bent portion 812, so that it receives relatively less resistance to the material when lowered. Accordingly, the spoon portion 83 can be smoothly lowered on the material and then easily bent by the bending portion 812 to form a spoon shape.

Meanwhile, the wire 85, the drum 86, and the lifting drive unit 87 are configured to prevent the spoon unit 83 from unfolding to its original state due to the resistance of the material in the process of being raised.

The lower end of the wire 85 is coupled to the lower side of the spoon portion 83, and the upper side protrudes outside the upper side of the tank portion 10.

The drum 86 protrudes outward from the upper side of the tank portion 10. The drum 86 winds or unwinds the wire 85.

The lifting drive unit 87 protrudes outward from the upper side of the tank unit 10.

The lifting drive unit 87 may be formed of a motor. The motor shaft of the lifting drive unit 87 is coupled to the drum 86.

The lifting drive unit 87 rotates the drum 86 in the forward direction so that the wire 85 is wound around the drum 86, or rotates the drum 86 in the reverse direction so that the wire 85 is unwound from the drum 86. Make it possible.

The lifting drive unit 87 rotates the drum 86 in the forward direction when the second lifting cylinder 82 and the third lifting cylinder 84 raise the base part 81 and the spoon part 83, respectively, to lift the wire 85 ) is wound to a certain length, the lower sides of the bent portion 812 and the spoon portion 83 are maintained in a bent state.

At this time, the lifting drive unit 87 rotates the drum 86 in the forward direction corresponding to the rising speed of the base part 81 and the spoon part 83 by the second lifting cylinder 82 and the third lifting cylinder 84. This ensures that the lower sides of the bent portion 812 and the spoon portion 83 remain bent.

And, the lifting drive unit 87 is programmed to rotate the drum 86 in the reverse direction when the base unit 81 and the spoon unit 83 protrude upward from the tank unit 10. When the drum 86 is rotated in the reverse direction, the wire 85 is unwound and the bent portion 812 and the spoon portion 83 are restored to their original state by elastic force.

Accordingly, the degree of bending of the bent portion 812 and the spoon portion 83 is alleviated and the material contained in the spoon portion 83 freely falls. In addition, as the second lifting cylinder 82 lowers the base part 81 in advance of the third lifting cylinder 84, the base part 81 is separated from the spoon part 83, which causes the spoon part ( 83) unfolds again due to elastic force, and the material remaining in the spoon portion 83 falls freely.

Then, the free-falling material sinks again in the mixing space and is mixed by the mixing blade 22 when it enters the influence area of the mixing blade 22.

At this time, the above-described second lifting cylinder 82, the third lifting cylinder 84, and the lifting drive unit 87 are each operated by the tank unit 10 by the same rodless cylinder or linear cylinder as the position variable part 70 described above. ) or may be separated from the upper part of the tank unit 10.

In addition, the scraper unit 40 and the lifting unit 80 are programmed to operate alternately with each other so that the acting forces are not indirect to each other, or the first lifting cylinder 42 of the scraper unit 40 first lifts the tank unit 10. ) can be programmed to operate for a preset time and then be applied to the material within the tank unit 10 to be followed by the lifting unit 80 and operate for a preset time.

Meanwhile, four shock absorption modules 90 are used, each elastically supporting the bottom edge of the tank unit 10 when seated on the ground.

The shock absorption module 90 may be made of rubber to absorb shock.

The shock absorption module 90 absorbs vibration and shock generated when the mixer unit 20 and the rotation drive unit 30 operate, allowing the tank unit 10 and the mixer unit 20 to perform mixing of concrete materials in a stable structure. Allows you to perform.

Although not shown in the drawings, the concrete mixer 1 according to an embodiment of the present invention includes a box (not shown) in which the shock absorption module 90 is accommodated in the inner space and is seated on the ground, and an inner space of the box. They are arranged to be spaced apart from each other at a predetermined distance, and may further include an elastic support portion (not shown) to elastically support the shock absorption module 90.

At this time, the elastic support portion may be formed of a leaf spring or coil spring.

For this reason, the concrete mixer 1 according to an embodiment of the present invention, the shock absorption module 90 and the elastic support unit more efficiently absorb the shock generated by the operation of the mixer unit 20 and the rotation drive unit 30. It can be absorbed and buffered.

The above-described embodiments are for illustrative purposes, and those skilled in the art will recognize that the above-described embodiments can be easily modified into other specific forms without changing the technical idea or essential features of the above-described embodiments. You will understand. Therefore, the above-described embodiments should be understood in all respects as illustrative and not restrictive. For example, each component described as unitary may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope sought to be protected through this specification is indicated by the patent claims described later rather than the detailed description above, and should be interpreted to include the meaning and scope of the claims and all changes or modified forms derived from the equivalent concept. .

1: Concrete mixer 10: Tank part
11: discharge pipe 20: mixer unit
21: rotation axis 22: mixing blade
30: rotation driving part 40: scraper part
41: scraper 411: scraping blade
412: first passage hole 42: first elevating cylinder
43: Vibrator 50: Transfer unit
51, 811: Vertical portion 511: Second passing hole
52: horizontal part 53: push part
60: discharge part 61: air injection hose
62: air injection unit 63: main pipe
70: position variable part 80: raised part
81: Base portion 811a: Vertical guide hole
812: Bent portion 812a: Additional guide hole
813: Connection 8131: Coupling plate
814: Bending prevention bar 82: Second lifting cylinder
83: spoon part 831: additional coupling plate
84: Third lifting cylinder 85: Wire
86: Drum 87: Elevating port eastern part
90: Shock absorption module

Claims (3)

A tank section providing a space for mixing concrete materials; and
A mixer unit disposed in the mixing space to mix the ingredients
A scraper unit that scrapes material located on the inner wall of the tank unit;
a transfer unit that operates together with the scraper unit to transfer the material located on the side of the tank unit to the mixer unit;
A position variable unit that transfers the scraper unit in both directions to position the scraper unit and the transfer unit at the upper part of the tank unit or to separate the scraper unit and the transfer unit from the upper part of the tank unit;
a lifting part that lifts the material located in the lower area of the tank part so that it acts on the mixer part; and
It includes a shock absorption module that elastically supports the bottom of the tank portion,
The scraper unit,
a scraper having serrated scraping blades formed at regular intervals for scraping the material on one surface facing the inner wall of the tank;
a first lifting cylinder disposed outside the upper side of the tank unit, repeatedly raising and lowering the scraper to scrape the inner wall of the tank unit as the scraping blade is raised, and being transported by the position variable unit; and
It includes a vibrator that transmits vibration to the scraper through the piston of the first lifting cylinder,
The transfer unit,
A vertical portion coupled to the other side of the scraper;
a horizontal portion bent in a right angle direction at the bottom of the vertical portion; and
Connecting the top of the vertical portion and the end of the horizontal portion to form an inclined surface, and including a push portion that moves up and down with the scraper to push the material located on the side of the tank toward the center of the tank,
The scraper and the transfer unit are arranged to be connected to each other, and a plurality of first and second pass holes are formed at regular intervals along the longitudinal direction to allow the material located on the side of the tank unit to pass through the mixer unit,
The first passage hole and the second passage hole are formed in an inclined shape to transfer the material to the mixing blade,
It further includes a discharge unit that discharges the material contained in the first and second pass holes while the scraper and the transfer unit are raised to the upper side of the tank unit,
The discharge part,
Air injection hoses installed in each of the first passing holes; and
An air injection unit that injects air into the first passage hole and the second passage hole through the air injection hose to discharge the material,
The raised part is,
A pair of vertical parts spaced apart from each other at a certain distance in the horizontal direction and having vertical guide holes formed on surfaces facing each other, each connected to the bottom of the vertical parts, and connected to the vertical guide holes on surfaces facing each other. A guide hole is formed, and when the tank is put into the mixing space by a lowering operation, it is supported on the bottom of the tank and bent at a certain level, and a pair of bent parts that first contact the bottom of the tank and the vertical A base portion including a connection portion connecting the upper side of the portion in a horizontal direction;
a second lifting cylinder that is coupled to the connection part outside the upper side of the tank unit and lowers the base unit into the mixing space and then repeatedly lifts the base unit for a preset time;
By floating the material located in the lower area of the tank part with the space between the vertical parts closed, one side and the other side are jointly accommodated in the vertical guide hole and the additional guide hole, and the lower part is in the additional guide hole. A spoon part that is guided and bent at a certain level;
It is connected to the upper side of the spoon portion from the outside of the upper side of the tank portion, and when the base portion is inserted into the mixing space and the bent portion is bent, the spoon portion is lowered and the lower side is bent to a certain level by an additional guide hole, thereby creating a space between the vertical portions. closed, and the spoon part rises at the same speed as the second elevating cylinder so that the spoon part scoops up the material located in the lower area of the tank part, and then follows the second elevating cylinder to lower the spoon part into the mixing space. a third lifting cylinder;
a wire whose lower end is coupled to the lower side of the spoon portion and whose upper side protrudes toward the upper side of the tank portion;
a drum on which the wire is wound or unwound; and
When the second lifting cylinder and the third lifting cylinder respectively lower the base part and the spoon part, the drum rotates in the wire unwinding direction, and the second lifting cylinder and the third lifting cylinder raise the base part and the spoon part, respectively. A concrete mixer including a lifting mechanism that rotates the drum in the wire winding direction to maintain the bent portion and the lower side of the spoon portion in a bent state.
According to paragraph 1,
A concrete mixer further comprising a rotation drive unit that rotates the mixer unit to mix the materials.
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