JPH0518100Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cement mixer for kneading cement at a construction site.

[Conventional technology]

Cement used as a construction material for buildings and the like is mixed with water at a construction site, for example, in a cement mixer shown in FIG. 3.

This cement mixer 1 has a spindle 4 with a plurality of small stirring blades 3 attached above and below installed in the center of a vertical cylindrical stirring tank 2, and a transmission shaft 6, a bevel gear 7, The spindle 4 is rotated through the stirring blade 8, and the cement and water supplied from the upper part of the stirring tank 2 are kneaded by the stirring blades 3.The inner wall of the stirring tank 2 is provided with a plurality of buttholes to facilitate the mixing. 9 is provided in a protruding manner, and the kneaded cement is discharged from an outlet (not shown) of the bottom wall 2a.

[The problem that the idea attempts to solve]

The above-mentioned stirring tank 2 is open at the top as shown in the figure to supply cement and water, so when cement is added, dust flies upwards and pollutes the surrounding area, or the dust is kept until it settles down. There was a loss of time due to having to wait for work to be done.

In addition, since the mixed cement tends to adhere to the inner wall of the stirring tank 2 and the buttful 9, conventionally, workers used to spray water on these areas with a hose to clean them, but this method saves labor. From this point of view, automation that eliminates manual work was desired.

The present invention was developed against the background of this situation, and aims to provide a cement mixer that prevents dust from flying up and automates the cleaning of adhered cement.

[Means to solve the problem]

In order to achieve the above-mentioned purpose, the present invention installs a spindle with a plurality of stirring blades upright in the center of a bottomed vertical cylindrical stirring tank, and as the spindle rotates, the water is supplied from the top of the stirring tank. In a cement mixer for kneading cement and water, the top of the stirring tank is covered with a cover, and a water supply port is provided in the cover at a position above the spindle, and water is supplied from the water supply port to the upper end surface of the spindle. It is characterized by a fixed dish plate that diffuses water into the stirring tank.

[Effect]

According to the above configuration, the cover prevents dust from rising in the cement put into the stirring tank. Further, the water supplied from the water supply port is diffused by the dish plate and cleans the cement adhering to the inside of the stirring tank.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

The cement mixer 10 has a vertical cylindrical stirring tank 11 having a bottom wall 11a, the upper part of which is closed with a cover 12, and a spindle 13 located in the center of the tank 11, which has a bottom wall 11a.
It is erected to penetrate through 1a.

The cover 12 has a circumferential surface 12b of a horizontal top portion 12a disposed above the spindle 13, which is inclined downwardly toward the outer circumference, and whose outer edge is connected to the stirring tank 1.
1 with bolts 12c, and the top 12a has a flange 1 fixed on the top surface.
4 is formed with a water supply port 15, and the peripheral surface 12b
An inspection port 16 for maintenance and a cement input duct 17 are provided.

The cement charging duct 17 is made of a flexible material such as hard rubber, and is provided so as to penetrate the cover 12 and protrude into and out of the stirring tank 11. When charging cement, a cloth tube is inserted into the duct, and a cloth tube is inserted into the duct. Cement is poured through a tube to ensure smooth feeding without mistakes and to prevent dust generation.

The spindle 13 is composed of a core shaft 13a to which a driven pulley 18 is fixed to the lower end protruding from the bottom of the bottom wall 11a, and an outer sleeve 13b inserted over the core shaft 13a. A guide sleeve 19 for a bearing is provided upright between the shaft 13a and the outer sleeve 13b, and the driven pulley 18 is a drive pulley 21 fixed to a drive shaft 20a of a motor 20 disposed on the side of the stirring tank 11.
The core shaft 13a and the outer sleeve 13b are connected to each other by a belt 22, and driven by a motor 20, the core shaft 13a and the outer sleeve 13b rotate together.

The outer sleeve 13b has a plate plate 23 for watering fixedly attached to its upper end surface, a beating rod 24 protruding from its lower part, and a plurality of stirring blades 25 on the outer periphery of the lower end near the bottom wall 11a. is attached.

The dish plate 23 is a circular plate having a larger diameter than the outer sleeve 13b, and has notches 23a formed inward from the outer circumference at equal intervals, and the outer edge of the uncut portion is slightly inclined upward. The inside is the flat part 23b
The fins 23c are formed on the slanted outer edge, and the water supplied from the water supply port 15 flows through the flat part 2.
3b, or is guided by the fins 23c or passes through the notch 23a, and scatters onto the inner wall of the cover 12 or the inside of the stirring tank 11.

Therefore, according to the dish plate 23, the supplied water is uniformly distributed without being concentrated in one place.
Cement can be kneaded effectively and suitably.

A part of the scattered water is deposited on the peripheral wall 11b of the stirring tank 11.
The cement flows directly to the buttful 26 protruding therefrom, or indirectly along the inner wall of the inclined circumferential surface 12b of the cover 12, and automatically performs a cleaning action to remove cement attached to these. Furthermore, the above-mentioned equalization of water sprinkling and automatic cleaning of adhering cement can be performed by automatic water supply without manual intervention by the operator.

In addition, the beating rod 24 is designed to prevent even if a part of the cement mixed by the stirring blade 25 enters and adheres to the inside of the cement charging duct 17 during mixing, this will not harden and interfere with cement charging. The lower part of the cement charging duct 17 is struck once by one rotation of the spindle 13. As mentioned above, the cement charging duct 17 is made of flexible hard rubber, so it is durable even when hit by the beating stick 24. It has excellent properties and can easily remove attached cement.

On the other hand, the stirring blade 25 is connected to the outer sleeve 13b.
It is a horizontally long large blade whose lower edge extending from the side base end to the tip near the buttful 26 is arranged close to the bottom wall 11a of the stirring tank 11, and the tip part has a return piece 25a.
is bent toward the rotating direction of the stirring blade 25, which in this embodiment is clockwise.

Since a large amount of cement is injected at once from the cement inlet duct 17, this turning piece 25a easily breaks down the cement deposited on the bottom wall 11a due to its falling weight and mass in the early stage of rotation, and the broken cement is raked inward of the stirring blades 25 so that a larger amount of cement can be efficiently kneaded in a shorter time.

This embodiment is configured as described above, and has a stirring tank 1.
1 is covered with a cover 12, thereby preventing dust from flying up when cement is added and contaminating the surrounding area thereby eliminating time lost while waiting for work.

In addition, since the equalization of water sprinkling, cleaning of adhering cement, and water supply are automated, costs can be reduced by saving labor, and work stability and self-maintenance are excellent, and stable kneading can be ensured over a long period of time.

[Effect of idea]

As explained above, the present invention covers the top of a bottomed vertical cylindrical stirring tank with a spindle set up in the center thereof, and a water supply port is arranged above the spindle of the cover. A dish plate is fixed on the top end surface to diffuse the water supplied from the water supply port into the stirring tank, which prevents dust from flying up when cement is added and contamination of the surrounding area due to this, eliminating loss of waiting time. You can work efficiently.

In addition, since the equalization of water sprinkling, cleaning of adhering cement, and water supply are automated, costs can be reduced by saving labor, and work stability and self-maintenance are excellent, and stable kneading can be ensured over a long period of time.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a cross-sectional front view of a cement mixer, FIG. 2 is a perspective view of essential parts, and FIG. 3 is a cross-sectional front view showing a conventional cement mixer. 10... Cement mixer, 11... Stirring tank,
11a...bottom wall, 11b...peripheral wall, 12...cover, 12a...top, 12b...peripheral surface, 13...
Spindle, 13a... Core shaft, 13b... Outer sleeve, 14... Flange, 15... Water supply port,
17...Cement input duct, 23...Dish plate, 2
3a...notch part, 23b...flat part, 23c...
...fin, 24...beating stick, 25...stirring blade, 2
5a...Kaeshihata, 26...Batsuful.

Claims (1)

[Scope of utility model registration request] In the cement mixer, a spindle equipped with a plurality of stirring blades is installed in the center of a bottomed vertical cylindrical stirring tank, and the cement and water supplied from the top of the stirring tank are kneaded by rotation of the spindle. The upper part of the stirring tank is covered with a cover, and a water supply port is disposed above the spindle of the cover, and a dish plate is provided on the upper end surface of the spindle to diffuse water supplied from the water supply port into the stirring tank. A cement mixer characterized by being permanently installed.