JP2003245621A - Apparatus and method for washing mixer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sufficiently wash a mixer large in volume equipped with a plurality of kneading shafts using a small capacity pump as it is and to miniaturize a washing apparatus while reducing a production cost. <P>SOLUTION: This mixer washing apparatus is equipped with a nozzle insertion port 12 for inserting a nozzle 11 into a kneading tank 2, a pipe shaft 24 having the nozzle provided to the leading end thereof and supplying high pressure water to the nozzle, a pipe shaft extending mechanism 22 for allowing the pipe shaft to advance and retreat axially and allowing the nozzle to advance into and retreat from the kneading tank, a pipe shaft shaking mechanism 18 for shaking the pipe shaft forwardly and rearwardly in such a state that the nozzle is inserted into the kneading tank, a sealing mechanism 41 for sealing the nozzle insertion port in such a state that the nozzle is inserted into the kneading tank, a closing means 14 for closing the nozzle insertion port in such a state that the nozzle is retracted and a control means for controlling the movements of the pipe shaft extending mechanism, the pipe shaft shaking mechanism and the closing means. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixer cleaning device and cleaning method. Specifically, the present invention relates to a cleaning device and a cleaning method suitable for a concrete mixer.

[0002]

2. Description of the Related Art For example, as disclosed in Japanese Unexamined Patent Publication No. 2000-61927, there is provided a mixer cleaning apparatus for inserting a nozzle for spraying cleaning water into a kneading tank of a mixer for cleaning.

The nozzle is attached to the tip of a pipe shaft for supplying high pressure water. The pipe shaft is held so as to be movable back and forth in the axial direction, and the nozzle is inserted into the kneading tank. The nozzle is rotated about the axis of the pipe shaft by the energy of the injected high-pressure cleaning water and is rotated about the axis orthogonal to the axis of the pipe shaft, spraying the cleaning water into the kneading tank and thoroughly filling the inside. It is configured to be washable.

[0004]

When the kneading tank of the mixer becomes large, there is a case where the inside of the kneading tank cannot be sufficiently cleaned only by injecting the washing water from one location in the kneading tank using one nozzle. As described in the above publication, conventionally, a plurality of pipe shafts having nozzles attached to their tips are provided and these nozzles and pipe shafts are simultaneously inserted into the kneading tank to enhance the cleaning effect.

However, the cleaning water jetted from the pipe shaft must be supplied at an extremely high water pressure. Therefore, in order to supply high-pressure water to a plurality of nozzles at the same time, a very large capacity pump is required, and the manufacturing cost of the cleaning device becomes extremely high. Therefore, although a plurality of nozzles are inserted into the kneading tank, high-pressure water is often supplied sequentially to the nozzles inserted into the kneading tank for cleaning. Further, in order to insert each nozzle into the kneading device at the same time, a plurality of pipe shafts and the like are required. Therefore, the device becomes large-scale.

If the gap between the nozzle insertion port and the pipe shaft is not sealed during washing, the washing water jetted at high pressure will leak to the outside. Providing a plurality of pipe shafts requires a plurality of the above-mentioned sealing structures, further complicating the structure and increasing the manufacturing cost of the device.

The present invention solves the above-mentioned problems of the prior art, is capable of sufficiently cleaning a large-capacity mixer having a plurality of kneading shafts with a small-capacity pump, and is capable of downsizing the apparatus. Provided is a mixer cleaning device and a cleaning method capable of reducing manufacturing costs.

[0008]

In order to solve the above problems, the present invention takes the following technical means.

The invention according to claim 1 of the present application is a mixer cleaning device for performing cleaning by inserting a nozzle for injecting high-pressure water into a kneading tank of a mixer, wherein the nozzle is inserted into the kneading tank. For inserting the nozzle, a pipe shaft for attaching the nozzle to the tip and supplying high-pressure water to the nozzle, and advancing and retracting the pipe shaft in the axial direction to move the nozzle into and out of the kneading tank. The pipe shaft extending mechanism and the nozzle are inserted into the kneading tank, and the pipe shaft swinging mechanism is configured to reciprocate the pipe shaft, and the nozzle is inserted into the kneading tank. A sealing mechanism for sealing the insertion opening, a closing means for closing the nozzle insertion opening in a state where the nozzle is retracted, the pipe shaft extending mechanism,
The pipe shaft swinging mechanism and the control means for controlling the movement of the closing means are provided.

The cleaning apparatus according to the present invention can thoroughly clean the inside of the kneading tank by using one nozzle and one pipe shaft. Moreover, even if a small pump is used, the pressure of washing water does not drop, so the structure is simple and
The manufacturing cost of the cleaning device can be significantly reduced.

Various commercially available nozzles can be adopted. It is also possible to employ a type that performs cleaning while rotating about the axis of the pipe shaft by the energy of the injected cleaning water and rotating about the axis orthogonal to the axis of the pipe shaft.

The number of kneading shafts of the mixer is not particularly limited. Usually there are two, but one or three
It can be applied to more than books. Further, the direction of the kneading shaft of the mixer is not particularly limited, and it can be applied not only to those supported in the horizontal direction but also to mixers of the type supported in the vertical direction for kneading.

The direction of insertion of the nozzle and the site of insertion into the kneading tank are not particularly limited. It may be configured to be inserted parallel to the kneading shaft, or may be configured to be inserted at an angle. Further, not only can the structure be inserted from the horizontal direction, but also the structure can be inserted from the vertical direction.

The pipe shaft extending mechanism can be constructed, for example, by including pipe shaft holding means for holding the pipe shaft so as to be able to advance and retreat in the axial direction, and pipe shaft driving means for moving the pipe shaft forward and backward. .

The pipe shaft holding means is only required to hold the pipe shaft so as to be able to advance and retreat in the axial direction, and can be easily constructed by using, for example, linear belling. Further, a cylinder device can be adopted as the pipe shaft driving means. The type of the cylinder device is not particularly limited, and for example, a hydraulic cylinder, a pneumatic cylinder or the like can be adopted.

The above-mentioned sealing mechanism seals between the outer peripheral portion of the pipe shaft and the nozzle insertion port during cleaning. The configuration of the sealing mechanism is not particularly limited, and may be configured so that washing water does not leak even if the pipe shaft is swung in the kneading tank. For example, as in the invention described in claim 2, the sealing mechanism includes a sealing plate held so as to be capable of swinging relative to the pipe shaft, and the pipe reciprocally swings. It can be configured to provide a seal between the shaft and the nozzle insert. By holding the sealing plate on the pipe shaft so that they can swing relative to each other,
The watertightness between the outer peripheral portion of the pipe shaft that swings back and forth and the nozzle insertion port can be improved.

As a mechanism for swingably holding the sealing plate, for example, an elastic body such as a centering bearing or a rubber ring can be adopted.

It is also possible to connect the sealing plate to the outer peripheral portion of the pipe shaft so as to advance and retreat integrally with the pipe shaft. Holds the pipe shaft slidably,
The nozzle insertion port can be positioned in a sealed state.

The pipe shaft swinging mechanism is configured to swing the pipe shaft back and forth with the nozzle inserted into the kneading tank. The means for reciprocally swinging the pipe shaft is not particularly limited, and pneumatic or hydraulic cylinders, motors or the like can be used. By providing the pipe shaft swinging mechanism,
With one nozzle, it is possible to perform cleaning from different positions in the kneading tank, and not only the cleaning effect but also the cleaning efficiency can be significantly increased.

The position of the swing shaft is not particularly limited, but for example, as in the invention described in claim 4,
The pipe shaft extension mechanism can be configured to be swingably held around a swing axis set near the nozzle insertion port. Further, the direction of the swing axis is not limited to the vertical axis along the wall surface of the kneading tank provided with the nozzle insertion port, and can be set according to the form of the kneading tank, the position of the kneading shaft, or the like. it can.

Further, as in the invention described in claim 5,
The pipe shaft swinging mechanism can be configured by holding the pipe shaft extending mechanism swingably around an axis passing through the center of the sealing plate that seals the nozzle insertion port. In order to match the swing axis of the pipe shaft extending mechanism with the center of the sealing plate that seals the nozzle insertion port, the sealing surface of the nozzle insertion port is displaced to a position away from the wall surface of the kneading tank. It can be provided or the holding position of the sealing plate with respect to the pipe shaft can be provided by being displaced axially outward from the sealing surface of the nozzle insertion port.

The pipe shaft swinging mechanism can be constructed by supporting the pipe shaft extending mechanism via bearings provided above and below the pipe shaft insertion opening. Further, in the case where the bearings cannot be provided above and below the pipe shaft insertion opening, the pipe shaft extension mechanism can be held at a portion apart from the nozzle insertion opening via a parallelogram link mechanism or the like. In this case, the pipe shaft extension mechanism can be configured to be swingable around an imaginary axis passing through the swing center of the sealing plate.

The invention according to claim 6 of the present application comprises a pipe shaft rotating mechanism for cleaning while rotating the pipe shaft.

A three-dimensional rotary nozzle that injects cleaning water while rotating around the axis of the pipe shaft and rotating around the axis orthogonal to this axis is very expensive. By providing the pipe shaft rotating mechanism, it becomes unnecessary to employ the three-dimensional rotating nozzle. Therefore, the manufacturing cost of the cleaning device can be significantly reduced by using the two-dimensional rotary nozzle.

As the above-mentioned closing means, various conventional methods can be adopted. According to the present invention, the pipe shaft extending mechanism can close the closing means while the nozzle is retracted from the nozzle insertion port. For example, the closing door may be swingably held at the edge of the nozzle insertion port. Further, the closing door can be configured to be held slidably along the nozzle insertion opening.

The control means is provided to control the movements of the pipe shaft extending mechanism, the pipe shaft swinging mechanism, the closing means and the like to automate the cleaning of the kneading tank. Various control mechanisms using a microcomputer or the like can be adopted as the control means. Further, it is desirable that the control is performed in combination with a sensor that detects the swing range of the pipe shaft, the extended / retracted position, and the like.

The invention described in claim 7 of the present application is a method for cleaning a mixer in which a nozzle for injecting high-pressure water is inserted into a kneading tank of the mixer for cleaning, and a nozzle for injecting high-pressure water is provided at the tip. The mounted pipe shaft is reciprocally rocked in the kneading tank for cleaning.

As a mode in which the pipe shaft is reciprocally rocked, cleaning is performed in a state where the nozzle is stationary at two or more rocking positions, and in which cleaning water is jetted while reciprocating rocking. Embodiments are included.

Since the washing water can be sprayed from different positions in the kneading tank with one nozzle inserted from one nozzle insertion port, a high washing effect can be obtained. In addition, work efficiency is significantly improved.

According to the eighth aspect of the present invention, the pipe shaft is cleaned while advancing and retracting in the kneading tank. The cleaning effect can be further enhanced by performing the cleaning while performing the reciprocating rocking motion and the advancing / retreating motion.

According to a ninth aspect of the present invention, the pipe shaft is washed while being rotated in the kneading tank.

By cleaning the pipe shaft while rotating it in the kneading tank, it becomes unnecessary to use an expensive three-dimensional nozzle, and the manufacturing cost of the apparatus can be greatly reduced.

According to a tenth aspect of the present invention, when the mixer is operating, the nozzle insertion port for inserting the nozzle into the kneading tank is closed by the sealing lid, and the tip portion of the nozzle or the above The pipe shaft extension mechanism presses the sealing lid toward the nozzle insertion port. .

By utilizing the pipe shaft extension mechanism, the watertightness of the nozzle insertion port can be greatly increased.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION A cleaning apparatus according to the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a front view of the entire typical two-axis concrete mixer as seen from the tip side of the kneading shaft. 2 to 8 show a first embodiment of the cleaning apparatus according to the present invention.

As shown in these figures, the mixer 1 comprises a kneading tank 2 and a kneading shaft 3 rotated in the kneading tank. The kneading tank 2 is configured by connecting a main body 4 supporting a kneading shaft 3 in a horizontal direction and a lid portion 5 provided with a cleaning device according to the present invention. The kneading shaft 3 is provided with a large number of kneading blades 6, and by rotating these kneading blades 6, kneading of concrete is performed.

As shown in FIGS. 2 and 3, the cleaning device 10 according to the present embodiment is provided with one nozzle insertion port 12 in the lid portion 5, and one nozzle 11 is inserted from this nozzle insertion port 12. And wash.

As shown in FIG. 3, a pair of upper and lower brackets 7 and 8 are provided on the side surface of the lid 5, and the cleaning device main body 20 is swingably held by the brackets 7 and 8. There is. Although the brackets 7 and 8 are provided integrally with the lid 5, they may be provided via a reinforcing structure such as a reinforcing plate.

On the side surface of the lid portion between the brackets 7 and 8,
The nozzle insertion port 12 is provided. The cleaning device body 20 is located at a position facing the nozzle insertion opening 12,
Through a bearing (not shown) provided on the bracket, the bracket is reciprocally swingably held around the axis of these bearings.

A closing lid 14 for closing the nozzle insertion opening 12 is provided on the side surface of the lid portion 5. The closing lid 14 according to the present embodiment is slidably held along the side wall of the lid portion 5 provided with the nozzle insertion port 12, and the air cylinder 15 closes the nozzle insertion port shown in FIG. It can be slid between a position and the position which opens the nozzle insertion opening 12 shown in FIG. In addition, the nozzle insertion port 1
2 is closed, the tip of the nozzle 11 is closed with a closing lid 14
It is configured to increase the water-tightness of the closing lid 14 by pressing against.

A cylinder 16 for reciprocally swinging the cleaning device main body 20 around the swing shaft 13 is provided on the side of the cleaning device main body 20 opposite to the side where the closing lid 14 is provided. A pipe shaft swinging means 18 is configured with the brackets 7 and 8. The tip of the piston 19 of the cylinder 16 is connected to the side portion of the main body of the cleaning device, and by retracting the piston 19, the main body 20 of the cleaning device is reciprocally swung around the axes of the brackets 7 and 8. .

The main body 20 of the cleaning apparatus comprises a frame 21 having a frame structure along each side of a rectangular parallelepiped, and the frame 21 is provided with a pipe shaft extension mechanism 22 and the like.

The pipe shaft extension mechanism 22 is shown in FIG.
And, as shown in FIG. 6, a pipe shaft holding means 23 for holding the pipe shaft 24 so as to be able to advance and retreat in the axial direction and a pipe shaft driving means 25 for moving the pipe shaft 24 in the axial direction are held on the frame 21. Is configured.

The pipe shaft holding means 23 is provided with a guide rail 27 provided on the lower surface of a rectangular pipe-shaped holding beam 26 joined in a crosswise manner in the longitudinal direction of the frame 21 and a pair of guide rails 27. Sliders 28, 2
And a hanger 29 held slidably in the axial direction. The pipe shaft 24 is rotatably held by the hanger 29 via a pair of radial bearings 30, 30.

In the pipe shaft driving means 25 according to the present embodiment, the rodless cylinder 31 is joined to the side surface of the holding beam 26, and the hanger is attached to the moving body 32 extending from the side surface of the rodless cylinder 31. 29
Is formed by connecting a drive arm 33 integrally formed on the upper part of the. The drive system of the rodless cylinder 31 is not particularly limited, and a pneumatic system or a hydraulic system can be adopted. By adopting the rodless cylinder 31, not only the structure of the cleaning device 10 can be simplified, but also the axial dimension can be reduced.

When the rodless cylinder 31 is driven, the hanger 29 held by the guide rail 27 is
It is driven in the axial direction of the pipe shaft 24 via the drive arm portion 33 connected to the moving body 32. Along with this movement, the nozzle 11 provided at the tip of the pipe shaft 24 is advanced and retracted.

Further, in the present embodiment, a pipe shaft rotating mechanism 34 for rotating the pipe shaft 24 about its axis is provided.

As shown in FIGS. 5 and 6, the pipe shaft rotating mechanism 34 includes the first sprocket 37 provided at the rear end of the pipe shaft 24 and the hanger 29.
Of the geared motor 36, a second sprocket 35 mounted on the shaft of the geared motor 36, a chain 38 spanning the first sprocket and the second sprocket. .

A hose 40 for supplying high-pressure washing water is connected to the rear end of the pipe shaft 24 via a rotary hose joint 39.

As described above, the pipe shaft 24
Is rotatably held by a hanger 29 via a pair of radial bears 30, 30, and high pressure water is jetted while rotating the nozzle 11 at the tip end about the axis by the pipe shaft rotating mechanism 34, and the inside of the kneading tank Washing can be done.

By providing the pipe shaft rotating mechanism 34, it becomes unnecessary to employ an expensive three-dimensional rotating nozzle. Therefore, the manufacturing cost can be significantly reduced by using the two-dimensional nozzle 11.

In front of the hanger 29 on the pipe shaft 24, a circular sealing plate 41 for sealing the nozzle insertion port 12 so that the cleaning water does not leak during the cleaning operation.
Is provided.

As shown in FIG. 7, the sealing plate 41 has a rubber sealing member 43 and a pressing plate 44 for fixing the sealing member 43 with bolts on the kneading tank side of the donut disk-shaped base plate 42. While being integrally connected, an alignment bearing 45 is integrally connected to the opposite side.

The aligning bearing 45 is provided with a watertight member 46, and the cleaning water is used as the pipe shaft 24.
It is configured so that it does not leak along the outer surface of the.

The base plate 42, the seal member 43 and the pressing plate 44 are swingably held on the outer periphery of the pipe shaft 24 via the centering bearing 45. In the embodiment, in the horizontal plane, both sides are held swingably within a range of about 15 degrees.

Further, as shown in FIG. 5, the sealing plate 41 is
An adjusting screw 48 is provided on the front surface of the hanger 29 so as to adjust the swinging range of the hanger 29.

By providing the sealing plate 41 so as to be swingable, washing water does not leak even when the pipe shaft 24 is inserted into the nozzle insertion port 12 and is reciprocally swung.

As shown in FIGS. 3 and 4, in the present embodiment, the entire frame 21 holding the pipe shaft extension mechanism and the like is described above by the air cylinder 16 provided on the side surface of the lid 5. It is rocked back and forth around the shaft 13. The shaft 13 is set so as to pass through the shaft of the alignment bearing 45 of the sealing plate 41 that seals the nozzle insertion port 12. With the above configuration, the pipe shaft 24 can be swung around the centering bearing 45, and even if the swing angle is set to a large value, the sealing plate 41 can be inserted into the nozzle insertion port 12.
The watertightness does not decrease as it is not displaced.

Hereinafter, the operation of the mixer cleaning device having the above configuration will be described in order with reference to the flowchart shown in FIG.

When the mixer shown in FIG. 2 is in operation, the closing lid 14 closes the nozzle insertion port 12, and the tip of the nozzle 11 presses the closing lid 14 to enhance watertightness.

To perform the cleaning, the pipe shaft 24 is retracted from the above state to release the pressure of the nozzle 11 (S).
101). Then, the closing lid is opened (S102), the pipe shaft 24 is extended, and the nozzle 11 is inserted into the kneading tank (S103).

In the embodiment, the sealing plate 41 is swingably connected to the outer peripheral portion of the base end of the pipe shaft 24, and the pipe shaft 24 is positioned at the position where the sealing plate 41 seals the nozzle insertion port 12. The extension position of is determined (S104).

In the above state, the pump (not shown) is operated,
High-pressure water is supplied to the pipe shaft 24 and ejected from the nozzle 11 (S105).

As shown in FIG. 4, while ejecting the high-pressure water, the pipe shaft 24 is reciprocally rocked (S106), and the pipe shaft is rotated (S1).
07). By swinging the pipe shaft 24 back and forth, it is possible to thoroughly clean the inside of the kneading tank while moving one nozzle to a different position in the kneading tank. Also, by rotating the pipe shaft, 2
While adopting the three-dimensional rotary nozzle, the same effect as using the expensive three-dimensional nozzle can be exhibited. After performing the above cleaning for a predetermined time, the pump is stopped (S108).

After the water in the pipe shaft is drained (S109), the pipe shaft is swung to a position along the axis of the nozzle insertion port (S110) and then retracted (S11).
1).

After pulling out the nozzle 11 from the kneading tank, the closing lid is closed (S112), and the state in which the tip of the nozzle 11 is brought into contact with the closing lid shown in FIG. 2 is returned to (S113).

9 to 14 show a second embodiment of the present invention. In the present embodiment, the parts other than the sealing mechanism and the closing means are almost the same as those in the first embodiment, and the description thereof will be omitted.

In the cleaning device 110 according to the present embodiment, one nozzle insertion port 112 is provided in the lid 105, and one nozzle 111 is inserted from this nozzle insertion port 112 for cleaning. It is similar to the form.

As shown in FIG. 9, a reinforcing plate 201 is joined to the side portion of the lid portion 105 and provided on the reinforcing plate.

As shown in FIG. 11, a pair of upper and lower brackets 107 and 108 are provided on the outer surface of the reinforcing plate 201. The cleaning device main body 120 and the upper and lower bearings 202 and 203 are provided on the brackets 107 and 108. It is held swingably through.

A nozzle insertion port 112 is provided in the middle of the brackets 107 and 108. As shown in FIG. 11, the nozzle insertion port 112 has the reinforcing plate 20.
An annular edge plate 204 having a circular truncated cone shape in a side view is welded to the surface of No. 1. By providing the edge plate 204, the swing shaft 113 of the cleaning apparatus main body 110 is fixed to the reinforcing plate 201.
The bearings 202 and 203 are easily separated from the surface of the bearing.

On the reinforcing plate 201, a closing lid 114 for closing the nozzle insertion port 112 is provided. The closing lid 114 according to the present embodiment is slidably held along the surface of the reinforcing plate 201, and has a position for closing the nozzle insertion port 112 shown in FIGS. 10 and 12 by the air cylinder 115. , The nozzle insertion port 112 shown by the imaginary line in these figures can be slid between the opened position.

As shown in FIG. 10, the closing lid 114 is provided on the upper and lower portions and side portions of the edge plate 204 of the reinforcing plate 201.
Guide rails 205, 206, 207 for guiding the are provided in the lateral direction. The guide rails 205 and 206
The guide rollers 208 and 209 provided on the upper and lower portions of the closing lid 114 on the leading end side are guided to. On the other hand, the guide rail 207 guides the guide roller 210 provided at the intermediate portion on the base end side of the closing lid 114. The guide rollers 208, 209, 210 are provided so as to rotate about a vertical axis.

As shown in FIG. 12, the tip ends of the guide rails 205, 206, 207 extending parallel to the reinforcing plate 201 are bent toward the reinforcing plate 201.
The closing lid 114 is attached to the nozzle insertion opening 1 by the cylinder 115.
When the pressing force is applied from the cylinder 115 by sliding it to the position where 12 is sealed, the guide rails 205, 20
The guide rollers 208, 209, 210 are displaced toward the reinforcing plate 201 by the bent and inclined portions of 6, 6, 207. As a result, the closing lid 114 is replaced by the edge plate 204.
The nozzle insertion port 112 can be closed by being pressed by the peripheral portion of the nozzle insertion port 112.

A guide rail 211 is provided below the nozzle insertion port 112. On the other hand, the closing lid 11
Guide rollers 212 and 213 supported around a horizontal axis are provided at both ends of the lower edge of the nozzle 4, and the closed position of the nozzle insertion opening shown in FIG.
It is configured such that it can slide between the opening positions of 12 while supporting the load of the closing lid 114.

13 and 14, the nozzle insertion opening 1 is shown.
A sealing mechanism 141 for sealing 12 is shown.

As shown in FIG. 13, the sealing mechanism 141 has an alignment bearing 145 connected to the center of a donut disk-shaped base plate 142 and a rubber bowl-shaped seal on the kneading tank side. A member 143 is provided and configured. A peripheral portion of the seal member 143 is connected to a peripheral portion of the base member 142, and a central portion of the seal member 143 has a central portion.
It is fixed around.

As shown in FIG. 14, the sealing structure of the sealing mechanism 141 and the swinging mechanism of the base plate 142 are provided separately, so that the pipe shaft 12 is kept watertight.
It is possible to greatly expand the swing range of No. 4.

FIG. 15 shows a third embodiment of the present invention. In this embodiment, the pipe shaft 324 is reciprocally slid in the axial direction and is simultaneously swung. In addition, in the present embodiment, each component is schematically represented.

In order to perform cleaning while reciprocating the pipe shaft 324 in the axial direction, a sealing mechanism 341 for sealing the nozzle insertion port 312 is slidable relative to the pipe shaft 324 in the axial direction, and the pipe shaft 324 is slidable. It must be held so that it can swing relative to 324. As the above-mentioned mechanism, for example, the same inner peripheral surface as that of the second embodiment and the outer peripheral surface of the pipe shaft 324 are held via a watertight sliding and rocking mechanism 324 such as an O-ring. be able to.

The sealing mechanism 341 is attached to the nozzle insertion port 312.
A sealing mechanism extension device 351 that displaces the sealing mechanism 341 in the axial direction of the pipe shaft 324 separately from the extension mechanism 323 of the pipe shaft 324 so that the sealing mechanism 341 can be pressed to the edge portion of the pipe shaft 324. It is provided. Like the pipe shaft extension mechanism 323, the sealing mechanism extension device 351 can be easily configured by using an air cylinder or the like.

With the above structure, the sealing mechanism 3 is moved while moving the nozzle 311 in the axial direction of the pipe shaft 324.
The kneading tank can be cleaned by rocking about the rocking axis of 41, and the cleaning effect can be further enhanced.

[0084]

In the cleaning apparatus according to the present invention, the nozzle is inserted from one nozzle insertion port and the nozzle is reciprocally rocked in the kneading tank. This allows the nozzle to be held at different positions in the kneading tank for cleaning,
The same effect as inserting a plurality of nozzles can be exhibited, and working efficiency is improved. Moreover, it does not require a large capacity pump. Therefore, the manufacturing cost of the device can be reduced.

Further, by holding the sealing plate swingably, it is possible to effectively prevent the cleaning water from leaking during cleaning.

Further, by constructing the nozzle so that it can be cleaned while moving in the axial direction of the pipe shaft, the cleaning effect can be further enhanced.

[Brief description of drawings]

FIG. 1 is a front view of a mixer to which a cleaning device according to the present invention is applied.

FIG. 2 is a plan view in which a cleaning device is attached to the mixer shown in FIG.

FIG. 3 is a side view of a main part of the cleaning apparatus shown in FIG.

FIG. 4 is a plan view showing an internal state in which a nozzle is inserted into a kneading tank for cleaning.

5 is a side view showing a cross section of a main part of the cleaning apparatus shown in FIG.

6 is a right side view of the cleaning device shown in FIG.

FIG. 7 is a cross-sectional view illustrating the operation of the sealing plate.

FIG. 8 is a flowchart showing an example of an operation procedure of the cleaning device.

FIG. 9 is a plan view showing a second embodiment of the cleaning device.

10 is a front view of a lid portion of the cleaning device in FIG.

FIG. 11 is a cross-sectional view taken along the line ABCDEF in FIG.

12 is a view showing the action of the closing plate and is a cross-sectional view taken along line XII-XII in FIG.

FIG. 13 is a partial cross-sectional view of a sealing mechanism.

FIG. 14 is a cross-sectional view showing the operation of the sealing mechanism.

FIG. 15 is a diagram showing another embodiment of the present invention.

[Explanation of symbols]

2 kneading tank 10 Cleaning device 11 nozzles 12 nozzle insertion port 14 Closing means 18 Pipe shaft swing mechanism 22 Pipe shaft extension mechanism 24 pipe shaft 41 sealing plate

Claims (10)

[Claims] 1. A washing device for a mixer, wherein a nozzle for injecting high-pressure water is inserted into a kneading tank of a mixer for washing, and a nozzle insertion port for inserting the nozzle into the kneading tank, and the nozzle. A pipe shaft for supplying high-pressure water to the nozzle, and a pipe shaft extension mechanism for advancing and retracting the pipe shaft in the axial direction to move the nozzle into and out of the kneading tank; Pipe shaft swinging mechanism that reciprocally swings the pipe shaft in a state where the nozzle is inserted in the kneading tank, and a sealing mechanism that seals the nozzle insertion port in a state that the nozzle is inserted in the kneading tank. A closing means for closing the nozzle insertion opening while the nozzle is retracted; the pipe shaft extension mechanism, the pipe shaft swinging mechanism, and the closing means. And control means for controlling the movement, the mixer cleaning device. 2. The sealing mechanism comprises a sealing plate held so as to be capable of swinging relative to the pipe shaft, and the pipe shaft and the nozzle insertion port that swing back and forth. The cleaning device for a mixer according to claim 1, wherein a sealing between the cleaning device and the cleaning device is performed. 3. The sealing plate according to claim 2, wherein the sealing plate is held slidably in the axial direction with respect to the pipe shaft, and is positioned and held in a state where the nozzle insertion port is sealed. Mixer cleaning device. 4. The pipe shaft swinging mechanism is constituted by holding the pipe shaft extending mechanism swingably around a swing axis set near the nozzle insertion opening. The cleaning device for a mixer according to claim 3. 5. The pipe shaft swinging mechanism is configured to hold the pipe shaft extending mechanism swingably around an axis passing through the center of the sealing plate that seals the nozzle insertion port. The cleaning device for a mixer according to any one of claims 1 to 4. 6. The mixer cleaning device according to claim 1, further comprising a pipe shaft rotating mechanism that performs cleaning while rotating the pipe shaft. 7. A method of cleaning a mixer, wherein a nozzle for injecting high-pressure water is inserted into a kneading tank of a mixer for cleaning, and a pipe shaft equipped with a nozzle for injecting high-pressure water at a tip is provided in a kneading tank. Washing method of a mixer, in which the mixer is reciprocally rocked to be washed while being inserted into the. 8. The mixer cleaning method according to claim 7, wherein the pipe shaft is cleaned while advancing and retracting in the kneading tank. 9. The washing is performed while rotating the pipe shaft in the kneading tank while rotating around the axis of the pipe shaft.
The method for cleaning a mixer according to claim 7 or 8. 10. When the mixer is operating, the nozzle insertion port for inserting the nozzle into the kneading tank is closed by a sealing lid, and the tip end of the nozzle or the pipe shaft extending mechanism is used for sealing. The method for cleaning a mixer according to claim 7, wherein the lid is pressed toward the nozzle insertion port.