JP2005199859A - Concrete mixer truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete mixer truck capable of cleanly removing ready-mixed concrete deposited in a mixer drum, particularly that deposited on an inner surface side of a blade or ready-mixed concrete deposited in a feed cylinder for feeding it from a hopper into the mixer drum. <P>SOLUTION: In the concrete mixer truck, the mixer drum 2 having the blade 3 at the inside is rotatably mounted onto a vehicle body, a hopper 4 is provided behind a rear end of the mixer drum 2 and a discharge part 4a formed on a lower part of the hopper 4 is communicated with the inside of the mixer drum 2 through the feed cylinder 5 continuously provided on the blade 3. A first washing nozzle 81 is arranged facing to a rear end of the blade 3 such that it injects washing water to an inner surface side of the rear end of the blade 3. An opening 42 is provided on an upper part of a communication part of the discharge part 4a formed on a lower part of the hopper 4 and the feed cylinder 5 and a second washing nozzle 82 is arranged facing to the opening 42 such that it injects washing water into the feed cylinder 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mixer truck that transports ready-mixed concrete to a construction site or the like.

  Mixer trucks that transport raw concrete to a construction site or the like while kneading are well known.

  In such a mixer vehicle, if the ready-mixed concrete remains inside the mixer drum after the operation of discharging the ready-mixed concrete from the mixer drum is completed, it is solidified as it is, so it is necessary to remove it.

Therefore, conventionally, for example, the discharge passage at the rear end of the mixer drum is closed, and cleaning water is circulated back and forth by the action of the blade in the mixer drum to remove the ready-mixed concrete (Patent Document). 1).
JP 57-7730 A

  However, each time the inside of the mixer drum is cleaned, the operator has to perform a troublesome work of closing the discharge passage, so that the work efficiency is poor and a strong cleaning power can be obtained only by the action of the circulating flow by the action of the blade. There was also a risk that raw concrete would remain attached.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to prepare the ready-mixed concrete that has adhered to the mixer drum by a simple operation, particularly the ready-mixed concrete that adheres to the inner surface side of the blade, the It is an object of the present invention to provide a mixer truck that can cleanly remove ready-mixed concrete adhering to a supply cylinder for supplying ready-mixed concrete.

  In order to achieve the above object, a mixer truck according to a first aspect of the present invention includes a mixer drum having blades mounted therein rotatably on a vehicle body, a hopper provided at the rear end of the mixer drum, and a hopper lower part. In the mixer truck in which the discharge portion formed in the nozzle is connected to the mixer drum through a supply cylinder connected to the blade, the first cleaning nozzle faces the rear end of the blade and the cleaning water is supplied to the rear end of the blade. It arrange | positions so that it may inject to an inner surface side.

  The mixer vehicle of the invention according to claim 2 is provided with an opening in the upper part of the communication part between the discharge part formed in the lower part of the hopper and the supply tube, and the second washing nozzle faces the opening and the washing water is supplied to the mixer. It arrange | positions so that it may inject in a supply cylinder.

  According to the present invention, it is a simple operation of simply injecting cleaning water from a cleaning nozzle, and clean concrete adhering to the inside of the mixer drum, particularly to the inner surface side of the blade, is cleanly cleaned by a strong spraying force of the cleaning water from the cleaning nozzle. can do.

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

  1 and 2 show the mixer truck of the present invention.

  In this mixer vehicle 1, a mixer drum 2 is mounted on a vehicle chassis (not shown) so as to be rotatable in the circumferential direction about its axis.

  The mixer drum 2 is configured to be rotatable in forward and reverse directions by a drive device (not shown) provided on the chassis.

  In addition, a blade 3 is spirally provided inside the mixer drum 2, and ready concrete is charged and kneaded or discharged by the action of the blade 3 accompanying the forward and reverse rotation of the mixer drum 2. ing.

  A hopper 4 for feeding ready concrete into the mixer drum 2 is disposed behind the rear end of the mixer drum 2, and a discharge portion 4 a formed at the lower portion of the hopper 4 is connected to the rear end portion of the blade 3. The cylindrical supply tube 5 is communicated with. Therefore, the ready-mixed concrete put into the hopper 4 is put into the mixer drum 2 from the discharge portion 4a of the hopper 4 through the supply cylinder 5.

  A pair of left and right scoops 6 are provided in a V shape below the hopper 4, and a discharge chute 7 is connected to the lower end of the scoop 6. Accordingly, the ready-mixed concrete is dropped onto the scoop 6 from the rear end of the mixer drum 2 by the rotation of the mixer drum 2 in the discharging direction, and discharged to the outside through the discharge chute 7.

  By the way, the mixer vehicle configured as described above is provided with a cleaning device 8 having a first cleaning nozzle 81 and a second cleaning nozzle 82.

  The first cleaning nozzle 81 faces the rear end opening of the mixer drum 2 and is disposed in a range that does not interfere with the rear end portion of the blade 3 so that cleaning water can be sprayed to the inner surface side of the rear end portion of the blade 3. .

  The second cleaning nozzle 82 is disposed above the communication portion between the supply cylinder 5 and the discharge portion 4 a of the hopper 4. In this communication portion, an annular packing 41 is disposed on the discharge portion 4 a of the hopper 4 over the outer peripheral surface receiving end side of the supply cylinder 5, and the supply cylinder 5 is slid in contact with the rotation of the blade 3. , The supply cylinder 5 and the discharge part 4a of the hopper 4 are in communication with each other in a manner that allows the supply cylinder 5 to rotate. Accordingly, an opening 42 is formed in the upper portion of the packing 41, and the second cleaning nozzle 82 is disposed facing the opening 42.

  The first and second cleaning nozzles 81 and 82 are communicated with a storage tank that stores cleaning water via a pump (not shown) by each supply hose 83, and the cleaning water supplied from the storage tank by the pump is predetermined. It is made to inject with the injection power of.

  By constructing the cleaning device 8 in this way, after the transporting operation of discharging the ready-mixed concrete to the outside, the cleaning water is jetted from the first and second cleaning nozzles 81 and 82, so that the inside of the mixer drum 2 and the supply cylinder are injected. The inside of 5 can be easily cleaned.

  Specifically, the cleaning water is sprayed from the first cleaning nozzle 81 to the rear end of the blade 3, and the strong concrete adhering to the blade 3 is removed by the strong spray force. In particular, since the first cleaning nozzle 81 also injects cleaning water to the inner surface of the rear end of the blade 3, the ready-mixed concrete adhering to the inner peripheral surface of the mixer drum 2 and the base portion of the inner surface of the blade 3 is also clean. Can be removed.

  Further, by spraying the cleaning water into the interior through the opening 42 by spraying the cleaning water from the second cleaning nozzle 82, it is possible to cleanly remove the ready-mixed concrete adhering to the supply cylinder 5 by this strong spray force. .

  In this way, the inside of the mixer drum 2 can be cleaned cleanly by a simple operation of simply spraying the cleaning water from the cleaning nozzles 81 and 82, and by the strong spraying force from the cleaning nozzles 81 and 82.

  Note that the above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope thereof.

  For example, the number of the first cleaning nozzles 81 and the second cleaning nozzles 82 is not limited to one each, and an appropriate number may be provided as necessary.

It is a partially broken side view showing the vicinity of the rear end portion of the mixer drum of the mixer vehicle of the present invention. It is a rear view which similarly shows the mixer drum rear end part of a mixer vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mixer car 2 Mixer drum 3 Blade 4 Hopper 4a Discharge part 5 Supply pipe | tube 8 Cleaning apparatus 81 1st washing nozzle 82 2nd washing nozzle

Claims (2)

A mixer drum having blades is rotatably mounted on the vehicle body, a hopper is provided behind the rear end of the mixer drum, and a discharge portion formed in the lower part of the hopper is fed into the mixer drum through a supply cylinder connected to the blade. In the mixer truck communicated with
A mixer vehicle characterized in that a first cleaning nozzle faces the rear end of the blade so as to inject cleaning water toward the inner surface of the blade rear end. An opening is provided in the upper part of the communication part between the discharge part formed in the lower part of the hopper and the supply cylinder, and the second cleaning nozzle is arranged so as to spray the cleaning water into the supply cylinder facing the opening. The mixer truck according to claim 1.

Images