Duct cleaning device

Abstract

To provide an air duct cleaning device which improves workability during cleaning compared to conventional cleaning devices while enabling the entire part of an air duct to be cleaned completely.SOLUTION: An air duct cleaning device 10 includes: a first placement part 11 on which a contracted air duct 1 may be placed; a cleaning liquid jet part 13 capable of jetting a cleaning liquid to the air duct 1; and a gas jet part 14 capable of jetting a gas to the air duct 1 and further includes an oblique guide part 15 which may guide the air duct 1 in an oblique upward direction while pulling and extending the air duct 1 placed on the first placement part 11. In this case, the cleaning liquid jet part 13 and the gas jet part 14 are arranged so as to be able to jet the cleaning liquid and the gas to the air duct 1 which is guided in the oblique upward direction by the oblique guide part 15.SELECTED DRAWING: Figure 2

Description

【Technical Field】 【0001】 The present invention relates to a duct cleaning device. 【Background Art】 【0002】 Conventionally, when performing work in underground spaces or confined spaces such as sewer construction or underground communication line construction, ventilation, air supply, or exhaust has been performed through a portable duct (also called a duct). 【0003】 By using a duct, the surface of the duct becomes dirty, so it is necessary to clean the duct after use. Therefore, the duct was manually cleaned by an operator using a high-pressure washer or the like. However, since the length of the duct reaches several meters, it is very laborious to manually clean the duct while stretching it by hand, and a great deal of time was required for this work. In addition, if left uncleaned, a bad smell will occur, so it is necessary to hang and dry each cleaned duct one by one, which has also contributed to a significant increase in the working time. 【0004】 Therefore, in order to solve the above problems, for example, Patent Document 1 proposes a cleaning device for a portable duct. That is, this cleaning device includes a cleaning tank with an open upper part that can store a contracted duct, a cleaning water injection part that can inject cleaning water onto the inner peripheral surface and outer peripheral surface of the duct in a state where the duct stored in the cleaning tank is stretched upward, and an air injection part that can inject air onto the inner peripheral surface and outer peripheral surface of the above duct. By injecting cleaning water onto the duct in a state of being stretched upward, the dirt on the duct surface is washed away, and by injecting air onto the washed area, the cleaning water can be blown away. 【Prior Art Documents】 【Patent Documents】 【0005】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2002-320939 【Summary of the Invention】 [Problems that the invention aims to solve] 【0006】 In conventional cleaning devices, the folded air duct is housed inside a cylindrical cleaning tank, and the upper end of the air duct needs to be pulled up and pulled out through the opening at the top of the tank. However, since the air duct is long, in the configuration shown in the diagram, the worker has to reach into the cleaning tank with their hand to pull it out, which is very inefficient. Furthermore, if the remaining part of the air duct is housed while the end of the duct is grasped from the beginning, the end of the air duct cannot be cleaned at all. 【0007】 In view of the above circumstances, the present invention provides a duct cleaning device that allows the entire duct to be cleaned without leakage while also offering excellent workability during cleaning. [Means for solving the problem] 【0008】 The above problems are solved by the air duct cleaning device according to the present invention. Specifically, this cleaning device is a device for cleaning an extendable air duct, and is characterized by comprising a first mounting section on which a retracted air duct can be placed, a cleaning liquid spraying section on which a cleaning liquid can be sprayed onto the air duct, and a gas spraying section on which gas can be sprayed onto the air duct, further comprising an oblique guide section capable of guiding the air duct diagonally upward while extending the air duct that is placed on the first mounting section, the cleaning liquid spraying section being positioned so as to be able to spray cleaning liquid onto the air duct that is guided diagonally upward by the oblique guide section, and the gas spraying section being positioned so as to be able to spray gas onto the air duct on the forward side in the guide direction of the area where the cleaning liquid is sprayed. 【0009】 As described above, the air duct cleaning device according to the present invention is provided with an oblique guide section that can guide the air duct diagonally upward while extending the air duct in a mounted state, so that the air duct can be extended while being supported by the oblique guide section. Therefore, compared to the conventional method of extending the air duct vertically upward, the burden on the operator is reduced and the air duct can be extended smoothly. Furthermore, since the cleaning liquid and gas can be sprayed onto the air duct while it is being guided diagonally upward by the oblique guide section, the cleaning liquid and gas can also be sprayed onto the end of the air duct located furthest forward in the guide direction. Therefore, even when extending the air duct from a contracted state, it is possible to clean the entire air duct without leakage and remove the cleaning liquid to enable early drying. In summary, the air duct cleaning device according to the present invention makes it possible to clean the entire air duct without leakage while improving workability during cleaning. 【0010】 Furthermore, in the air duct cleaning device according to the present invention, the oblique guide section may have a pair of guide bars that are parallel to each other and extend diagonally upward, capable of supporting the lower part of the air duct. 【0011】 Since air ducts are typically cylindrical, configuring the oblique guide section as described above stabilizes the position of the air duct when it is extended, supported by a pair of guide bars. This allows for more stable support while extending the air duct, further improving the work efficiency of cleaning processes that involve extending the air duct. Furthermore, if the air duct can be guided diagonally upward by a pair of guide bars, a large portion of the area around the air duct becomes empty space, allowing the operator to extend the air duct relatively freely without worrying about interference with the oblique guide section. Therefore, it is particularly excellent in terms of work efficiency. 【0012】 Furthermore, in the case where a pair of guide bars are present, the air duct cleaning device according to the present invention may further have a pair of first curved sections located on the rear side in the guide direction of the pair of guide bars, which curve diagonally upward from below and connect to the pair of guide bars. 【0013】 By configuring the oblique guide section in this way, the air ducts extended upward from the pair of first mounting sections can be smoothly guided onto the pair of guide bars. This further improves the work efficiency involved in extending the air ducts. 【0014】 Furthermore, in the air duct cleaning device according to the present invention, the cleaning liquid spraying section may include a cleaning liquid supply pipe that extends upward from the first mounting section and has a curved shape that extends diagonally upward, and an internal cleaning liquid spraying section provided on the tip side of the cleaning liquid supply pipe and capable of spraying cleaning liquid onto the inner surface of the air duct. 【0015】 By configuring the cleaning fluid spray unit in this way, the inner surface of the air duct can be cleaned by utilizing the space inside the air duct when it is extended diagonally upward. Therefore, it is possible to spray the cleaning fluid easily and smoothly without the trouble of inserting a nozzle or the like into the inside of the extended air duct. Of course, in this case, the air duct is held in a predetermined position and orientation by the diagonal guide parts such as a pair of guide bars, so there is no risk of interference between the pair of guide bars and the cleaning fluid supply pipe (or the internal cleaning fluid spray unit). 【0016】 Furthermore, in this case, the air duct cleaning device according to the present invention may be configured to be rotatable around a vertical axis. 【0017】 As described above, by making the cleaning fluid supply pipe rotatable, the orientation of the tip of the cleaning fluid supply pipe can be changed. If the tip of the cleaning fluid supply pipe can be oriented in a direction different from the direction of guidance of the air duct by the oblique guide section, it becomes possible to easily place the retracted air duct on the first mounting section while avoiding interference with a part of the oblique guide section located on the front side of the cleaning fluid supply pipe's guidance direction, such as a pair of guide bars. 【0018】 Furthermore, the air duct cleaning device according to the present invention may further include a second mounting section on which an air duct that has been cleaned by a cleaning liquid injection section can be placed in a retracted state. In this case, the gas injection section may have a gas supply pipe that extends upward from the second mounting section and curves to extend diagonally downward, and an internal gas injection section provided on the tip side of the gas supply pipe and capable of injecting gas onto the inner surface of the air duct. 【0019】 By configuring the gas injection unit in this way, gas can be injected into the inner surface of the air duct by utilizing the inner space of the air duct when it is extended diagonally upward. Therefore, it is possible to easily and smoothly inject gas to blow away cleaning fluid adhering to the inner surface without the trouble of inserting a nozzle or the like into the inside of the extended air duct. Of course, in this case, the air duct is held in a predetermined position and orientation by the diagonal guide parts such as a pair of guide bars, so there is no risk of interference between the pair of guide bars and the gas supply pipe (or the gas injection unit for the inner surface). 【0020】 Furthermore, the air duct cleaning device according to the present invention may further include an annular member disposed around the oblique guide portion. In this case, the cleaning liquid spraying portion may further include an external cleaning liquid spraying portion provided on the inner surface of the annular member and capable of spraying cleaning liquid toward the outer surface of the air duct. Alternatively, the gas spraying portion may further include an external gas spraying portion provided on the inner surface of the annular member and capable of spraying gas toward the outer surface of the air duct. 【0021】 If the annular member is positioned around the oblique guide section, its axial dimension can be kept to the absolute minimum. Therefore, the annular member can function as both a cleaning fluid spray section and a gas spray section for the outer surface of the air duct, while minimizing interference with the extension operation of the air duct. 【0022】 Furthermore, if the device has a second mounting section, the air duct cleaning device according to the present invention may further include a pair of arm sections that allow the air duct to be placed on the second mounting section when open and that can further compress the retracted air duct when closed, and an opening and closing mechanism that can open and close the pair of arm sections. 【0023】 By providing a pair of arm portions that can be opened and closed as described above, the air duct can be easily contracted to a state where it can be transported. Therefore, it is possible to reduce the burden on the operator and further improve the overall workability. 【0024】 Further, when having an opening / closing mechanism, the opening / closing mechanism may include a pedal that can be depressed, a biasing member that pushes up the pedal against the depressing force of the pedal, and a link mechanism that connects the pedal and the pair of arm portions such that the pair of arm portions are closed when the pedal is depressed and the pair of arm portions are opened when the depression of the pedal is released. 【0025】 According to the opening / closing mechanism having the above configuration, after the operator performs the contraction operation of the air duct using the foot, the operator can immediately use the hand to tie the contracted air duct with a string to make it in a state where it can be transported (a bound state). Also, by removing the foot from the pedal after the binding operation, the bound air duct can be immediately taken out from the second placement portion (air duct cleaning device). From the above, according to this configuration, it is possible to significantly improve the workability related to the binding of the air duct after cleaning. 【0026】 Further, by providing a mechanism that can open and close the pair of arm portions in the portion (second placement portion) for placing the cleaned air duct as described above, a series of operations from cleaning, drying (dehydration) to binding can be compactly carried out on one device. Therefore, even in a limited space, it is possible to easily and smoothly clean and dry the air duct and make it in a state where it can be transported. 【Effects of the Invention】 【0027】 As described above, according to the air duct cleaning device according to the present invention, it is possible to clean the entire air duct without leakage and improve the workability during cleaning compared to the prior art. 【Brief Description of the Drawings】 【0028】 [Figure 1] It is a perspective view showing the overall configuration of an air duct cleaning device according to an embodiment of the present invention. [Figure 2]Figure 1 is a front view of the air duct cleaning device. [Figure 3] Figure 1 is a plan view of the air duct cleaning device. [Figure 4] Figure 2 is a cross-sectional view of the main part of the air duct cleaning device shown. [Figure 5] Figure 2 is a front view of the main components of the air duct cleaning device. [Figure 6] Figure 1 is a diagram illustrating an example of the operation of the air duct cleaning device, and is a front view of the air duct cleaning device showing the air duct placed on the first mounting section before cleaning. [Figure 7] Figure 1 is a diagram illustrating an example of the operation of the air duct cleaning device, and is a cross-sectional view of the main part of the air duct cleaning device showing the air duct in an extended state. [Figure 8] Figure 1 is a diagram illustrating an example of the operation of the air duct cleaning device, and is a front view of the main part of the air duct cleaning device showing the air duct placed on the second mounting section after cleaning. [Figure 9] Figure 1 is a diagram illustrating an example of the operation of the air duct cleaning device, and is a front view of the main part of the air duct cleaning device showing the air duct in a retracted state after cleaning. [Modes for carrying out the invention] 【0029】 The contents of a duct cleaning device according to one embodiment of the present invention will be described below with reference to the drawings. 【0030】 Figure 1 is a perspective view of the air duct cleaning device 10 according to this embodiment, and Figure 2 is a front view of the air duct cleaning device 10. As shown in Figure 1, the air duct cleaning device 10 comprises a first mounting section 11, a second mounting section 12, a cleaning liquid injection section 13, a gas injection section 14, and an oblique guide section 15. In this embodiment, the air duct cleaning device 10 further comprises an annular member 16, a pair of arm sections 17, 17, an opening / closing mechanism 18, and a trolley section 19. Details of each element will be described below. 【0031】 The first mounting section 11 allows the air duct 1 to be placed in a retracted state before cleaning, and has a first mounting base 20 to which one end 1a of the air duct 1 can be made contact. Here, the shape of the first mounting base 20 is not particularly limited and can take any form. Furthermore, the first mounting base 20 is positioned within a range that allows it to be guided while being pulled out diagonally upward by the oblique guide section 15, which will be described later. 【0032】 The second mounting section 12 allows the air duct 1 to be placed in a retracted state after cleaning, and has a second mounting base 21 to which the other end 1b of the air duct 1 can be made contact. Here, the shape of the second mounting base 21 is not particularly limited and can take any form. The second mounting base 21 is also positioned within a range in which the other end 1b (the end on the front side in the guide direction) of the air duct 1 that has passed through the oblique guide section 15, which will be described later, can be placed. 【0033】 As shown in Figure 2, the oblique guide section 15 allows the air duct 1, which is mounted on the first mounting section 11, to be guided diagonally upward while being extended, and is positioned between the first mounting section 11 and the second mounting section 12. Furthermore, in relation to the cleaning liquid injection section 13 and the gas injection section 14, the cleaning liquid injection section 13 is positioned to spray cleaning liquid onto the air duct 1, which is guided diagonally upward by the oblique guide section 15. In addition, the gas injection section 14 is positioned forward in the guide direction from the areas A1 and A2 where the cleaning liquid is sprayed, so that gas can be injected onto the air duct 1 (see Figure 7, which will be described later). 【0034】 In this embodiment, the oblique guide section 15 integrally comprises a pair of guide bars 22, 22 that extend parallel to each other and diagonally upward, a pair of first curved sections 23, 23 located on the rear side of the pair of guide bars 22, 22 in the guiding direction (left side in Figure 2), and a pair of second curved sections 24, 24 located on the front side of the pair of guide bars 22, 22 in the guiding direction (right side in Figure 2). 【0035】 The pair of guide bars 22, 22 are positioned and oriented (angled) at predetermined sizes (see Figures 4 and 7) so that the air duct 1 guided by these guide bars 22, 22 passes through both the areas A1, A2 where the cleaning fluid is sprayed and the areas B1, B2 where the gas is sprayed. The longitudinal dimension of each guide bar 22 is also set to a predetermined size. Furthermore, since the position supporting the lower part of the air duct 1 changes depending on the distance between the pair of guide bars 22, 22, the above distance is set according to the outer diameter of the air duct 1 and in consideration of the height position to be supported. 【0036】 The angle of each guide bar 22 with respect to the horizontal direction is arbitrary as long as it can guide the air duct 1 in an oblique direction. However, considering that an angle too close to the vertical upward makes it difficult to fully utilize the guiding function of the oblique guide section 15, the angle is set to a size greater than 10° and less than 45°, preferably greater than 10° and less than 30°. 【0037】 The pair of first curved sections 23, 23 have a shape that curves from below to diagonally upward and are smoothly connected to the pair of guide bars 22, 22 at their rear ends in the guiding direction (see Figure 2). This allows the air duct 1, which is extended upward from the first mounting section 11, to be smoothly introduced onto the pair of guide bars 22, 22. 【0038】 The pair of second curved sections 24, 24 have a shape that curves from diagonally upward to downward and are smoothly connected to the pair of guide bars 22, 22 at their forward ends in the guide direction (see Figure 2). This allows the air duct 1 that has passed through the diagonal guide section 15 to be smoothly introduced onto the second mounting section 12. 【0039】 In this embodiment, the oblique guide section 15 of the above configuration is attached to the annular member 16. The annular member 16 is erected on the trolley section 19. It is preferable that the orientation of the central axis of the annular member 16 and the guiding direction of the oblique guide section 15 be as close as possible. 【0040】 The cleaning fluid spray unit 13 includes a cleaning fluid supply source (not shown), a connection port 25 to which the piping for the cleaning fluid supplied from the supply source is connected, an internal cleaning fluid spray unit 26 capable of spraying cleaning fluid onto the inner surface 1c of the air duct 1, and an external cleaning fluid spray unit 27 capable of spraying cleaning fluid onto the outer surface 1d of the air duct 1 (see Figure 4). As the cleaning fluid supply source, a high-pressure washer capable of supplying cleaning water as cleaning fluid at high pressure can be used. 【0041】 In this embodiment, the cleaning fluid spray unit 13 further includes a cleaning fluid supply pipe 28 that connects the connection port 25 and the internal cleaning fluid spray unit 26. 【0042】 Here, the cleaning fluid supply pipe 28 has a shape that extends upward from the center of the first mounting base 20 of the first mounting section 11 and curves upward diagonally, as shown in Figure 2, for example. In this case, the internal cleaning fluid spray section 26 is provided on the tip side of the cleaning fluid supply pipe 28. In this case, the cleaning fluid supply pipe 28 and the pair of guide bars 22, 22 overlap in the guiding direction. In other words, the dimensions of the cleaning fluid supply pipe 28 in the guiding direction are set so that the internal cleaning fluid supply section 28 is positioned on the pair of guide bars 22, 22. 【0043】 The internal cleaning fluid spray unit 26 can be configured in any way that allows the cleaning fluid to be sprayed toward the inner surface 1c of the air duct 1. As an example, a rotating nozzle can be used that rotates on its axis due to the pressure of the high-pressure cleaning fluid, thereby spraying the cleaning fluid around it. 【0044】 The cleaning fluid supply pipe 28 in the above configuration is configured to be rotatable around its vertical axis (see Figure 3). This allows the tip of the cleaning fluid supply pipe 28 to be pointed in a direction different from the oblique guide section 15, enabling the retracted air duct 1 to be smoothly introduced onto the first mounting base 20 through the cleaning fluid supply pipe 28. The bearing that rotatably supports the cleaning fluid supply pipe 28 is preferably made of a resin with excellent water resistance. 【0045】 The external cleaning fluid spray unit 27 has a plurality of spray nozzles 29, as shown in Figures 1 and 4, for example. Each of these spray nozzles 29 branches off from an arc-shaped pipe 30 attached to the inner surface of the annular member 16 and is directed towards the inside of the annular member 16. The arc-shaped pipe 30 is connected to a connection port 25 provided in the annular member 16 so that the cleaning fluid can flow through it (not shown), thereby enabling the cleaning fluid to be sprayed onto the outer surface 1d of the air duct 1 that has passed through the inside of the annular member 16. 【0046】 Any known nozzle can be used as the spray nozzle 29, and for example, a spray nozzle capable of spraying cleaning liquid in a fan shape is preferably used. The same type of nozzle as the spray nozzle 29 can also be used for the spray nozzle 36, which will be described later. 【0047】 Furthermore, when the cleaning fluid spraying section 13 is configured as described above, a lid member 31 that can be opened and closed is provided at a predetermined position in the circumferential direction of the annular member 16, in order to allow the tip of the cleaning fluid supply pipe 28 to be introduced into the inside of the annular member 16 by axial rotation. 【0048】 The gas injection unit 14 includes a gas supply source (not shown), a connection port 32 to which the gas piping supplied from the supply source is connected, an internal gas injection unit 33 capable of injecting gas onto the inner surface 1c of the air duct 1, and an external gas injection unit 34 capable of injecting gas onto the outer surface 1d of the air duct 1 (see Figure 4). A compressor capable of supplying compressed air can be used as the gas supply source. 【0049】 In this embodiment, the gas injection unit 14 further includes a gas supply pipe 35 that connects the connection port 32 and the internal gas injection unit 33. 【0050】 Here, the gas supply pipe 35 has a shape that extends upward from the center of the second mounting base 21 of the second mounting section 12 and curves downward diagonally, as shown in Figure 2, for example. In this case, the internal gas injection section 33 is provided on the tip side of the gas supply pipe 35. In this case, the gas supply pipe 35 and the pair of guide bars 22, 22 overlap in the guiding direction. In other words, the dimensions of the gas supply pipe 35 in the guiding direction are set so that the internal gas injection section 33 is positioned on the pair of guide bars 22, 22. 【0051】 The internal gas injection unit 33 can be configured in any way that allows gas to be injected toward the inner surface 1c of the air duct 1. As an example, a configuration can be given in which multiple air nozzles of the type that can draw in surrounding air to increase the volume and accelerate the gas are arranged radially (see Figure 2, etc.). 【0052】 The gas supply pipe 35 in the above configuration is configured to be rotatable around a vertical axis (see Figure 3). This allows the tip of the gas supply pipe 35 to be pointed in a direction different from the oblique guide section 15, enabling the retracted (bound) air duct 1 to be smoothly removed from the first mounting base 20 through the gas supply pipe 35. 【0053】 The external gas injection unit 34 has a plurality of injection nozzles 36, as shown in Figures 1 and 4, for example. Each of these injection nozzles 36 branches off from an arc-shaped pipe 37 attached to the inner surface of the annular member 16 and is directed towards the inside of the annular member 16. The arc-shaped pipe 37 is connected to a connection port 32 provided in the annular member 16 so that cleaning fluid can flow through it (not shown), thereby enabling the injection of gas onto the outer surface 1d of the air duct 1 that has passed through the inside of the annular member 16. 【0054】 In addition, any known nozzle can be used as the injection nozzle 36, and for example, an injection nozzle capable of spraying gas in a fan shape is preferably used. 【0055】 The pair of arm sections 17, 17 are shaped to extend upward and bend toward each other, as shown in Figure 5, for example. These pair of arm sections 17, 17 are configured to be openable and closable by an opening / closing mechanism 18. Specifically, the pair of arm sections 17, 17 are configured to tilt toward each other while rising together by the opening / closing mechanism. This allows the pair of arm sections 17, 17 to retract from the second mounting base 21, enabling the cleaned air duct 1 to be introduced onto the second mounting base 21 from above. In addition, the pair of arm sections 17, 17 are configured to tilt toward each other while descending together by the opening / closing mechanism 18. This allows the pair of arm sections 17, 17 to further compress the air duct 1, which is placed on the second mounting base 21 in its contracted state (see Figure 5 for both). 【0056】 In this embodiment, the opening and closing mechanism 18 includes a pedal 38 that can be pressed down, a biasing member 39 such as a gas spring that pushes up the pedal 38 against the force of pressing down on the pedal 38, and a link mechanism 40 that connects the pedal 38 and the pair of arm portions 17, 17 so as to close the pair of arm portions 17, 17 when the pedal 38 is pressed down and open the pair of arm portions 17, 17 when the pedal 38 is released. 【0057】 Furthermore, in this embodiment, the opening and closing mechanism 18 is configured such that the link mechanism 40 and, consequently, the pair of arm portions 17, 17 are locked when the pedal 38 is pressed down and slid horizontally or slightly diagonally upward. 【0058】 Next, an example of the operation mode of the air duct cleaning device 10 with the above configuration will be explained, mainly with reference to Figures 6 to 9. 【0059】 First, as shown in Figure 6, take the cleaning fluid supply pipe 28 extending upward from the first mounting section 11 and rotate it by a predetermined phase (for example, 180°) around the vertical axis. Then, insert the air duct 1, which is to be cleaned, into the first mounting base 20 so as to pass through the cleaning fluid supply pipe 28. 【0060】 After placing the air duct 1 on the first mounting base 20, the cleaning fluid supply pipe 28 is rotated again with the lid member 31 of the annular member 16 open, so that the tip of the cleaning fluid supply pipe 28, which is the internal cleaning fluid spraying part 26, is positioned inside the annular member 16. Then, the other end 1b of the retracted air duct 1 (see Figure 6) is grasped and the air duct 1 is extended while the oblique guide part 15 guides the air duct 1 diagonally upward, so that the other end 1b of the air duct 1 is introduced into the inner space of the annular member 16 which will be the areas to be cleaned A1 and A2 (see Figure 7). 【0061】 Furthermore, before introducing the air duct 1 into the inner space of the annular member 16, the valve of the cleaning fluid connection port 25 is opened to supply cleaning fluid, such as high-pressure water, from a cleaning fluid supply source such as a high-pressure washer connected to the connection port 25 to the cleaning fluid spray section 13 (inner surface cleaning fluid spray section 26, outer surface cleaning fluid spray section 27). As a result, cleaning fluid is supplied from the connection port 25 to the inner surface cleaning fluid spray section 26 via the cleaning fluid supply pipe 28, and also to the multiple spray nozzles 29 that make up the outer surface cleaning fluid spray section 27 via the arc-shaped piping 30. Consequently, a cleaning fluid spray area A1 is formed around the inner surface cleaning fluid spray section 26, and a cleaning fluid spray area A2 is formed inside the outer surface cleaning fluid spray section 27 (see Figure 7). 【0062】 Similarly, the valve of the gas connection port 32 is opened to supply gas, such as high-pressure air, from a gas supply source such as a compressor connected to the connection port 32 to the gas injection unit 14. As a result, gas is supplied from the connection port 32 to the internal gas injection unit 33 via the gas supply pipe 35, and also to multiple injection nozzles 36 that form the external gas injection unit 34 via the arc-shaped piping 37. Consequently, a gas injection area B1 is formed around the internal gas injection unit 33, and a gas injection area B2 is formed inside the external gas injection unit 34. 【0063】 In this process, the gas injection areas B1 and B2 are formed further forward in the guide direction of the air duct 1 than the cleaning liquid injection areas A1 and A2. Therefore, as shown in Figure 7, by extending the air duct 1 and passing it through the inside of the annular member 16, the inner surface 1c and outer surface 1d of the air duct 1 are cleaned sequentially from the tip (other end 1b) of the air duct 1. After that, the cleaning liquid adhering to the inner surface 1c and outer surface 1d is blown away by the gas injection, and the air duct 1 is dewatered. 【0064】 After the air duct 1 has been subjected to the washing and dewatering treatment as described above, the other end of the air duct 1 1b is placed on the second mounting base 21 in a retracted state (see Figure 8). At this time, since the pair of arm sections 17, 17 are in an open state, the air duct 1 can be placed without interference with each arm section 17. 【0065】 After placing the cleaned air duct 1 on the second mounting base 21 in this manner, the pedal 38 is pressed down to close and push down the pair of arm sections 17, 17. This further compresses the air duct 1, which is placed in a contracted state (see Figure 9). At this point, the pedal 38 is slid to lock the pair of arm sections 17, 17 in the compressed state. This holds the air duct 1 in a compressed state, so the worker can remove their foot from the pedal 38 and move on to the next task, the binding task. Once the binding task for the air duct 1 is completed, the pedal 38 is slid back to its original position to release the lock on the pair of arm sections 17, 17. Further reducing the force applied to the pedal 38, or by removing the foot from the pedal 38, the pair of arm sections 17, 17 are pushed up and open by the biasing force from the biasing member 39. This leaves the top of the air duct 1 open. Here, the gas supply pipe 28 extending upward from the second mounting platform 21 is rotated around its vertical axis, and the tip of the gas supply pipe 35 is shifted away from the oblique guide section 15, making it easy to remove the air duct 1 from its restrained state. In this manner, the air duct 1 is cleaned, dried (dehydrated), and restrained to make it transportable. 【0066】 As described above, the air duct cleaning device 10 according to this embodiment is provided with an oblique guide section 15 that can guide the air duct 1 diagonally upward while extending the air duct 1 in a mounted state, so that the air duct 1 can be extended while being supported by the oblique guide section 15. Therefore, compared to the conventional method of extending vertically upward, the burden on the operator is reduced and the air duct 1 can be extended smoothly. In addition, since the cleaning liquid and gas can be sprayed onto the air duct 1 while it is guided diagonally upward by the oblique guide section 15, the cleaning liquid and gas can also be sprayed onto the end of the air duct 1 located furthest forward in the guide direction (the other end 1b) (see Figure 7). Therefore, even when cleaning is performed while extending the air duct 1 from a contracted state, it is possible to clean the entire air duct 1 without leakage and remove the cleaning liquid to enable early drying. As described above, the air duct cleaning device 10 according to this embodiment makes it possible to clean the entire air duct 1 without leakage while improving workability during cleaning. 【0067】 Furthermore, in the air duct cleaning device 10 according to this embodiment, the equipment for cleaning (cleaning liquid spray unit 13), the equipment for dewatering (drying) (gas spray unit 14), and the equipment for making it transportable (restrained) (a pair of arm units 17, 17, a lockable opening / closing mechanism 18) are mounted on a single device (cart unit 19). Therefore, a series of operations related to cleaning, drying, and restraining the air duct 1 can be compactly carried out on the cart unit 19. Thus, even in a limited space, it is possible to easily and smoothly clean, dry, and transport the air duct 1. 【0068】 Although one embodiment of the present invention has been described above, it goes without saying that the air duct cleaning device according to the present invention is not limited to the above-described example configuration, and various modifications are possible within the scope of the present invention. 【0069】 For example, in the above embodiment, a pair of guide bars 22, 22 are provided as the oblique guide section 15, but of course other configurations may be adopted. That is, the oblique guide section 15 can take any configuration as long as the operator can grasp the other end 1b of the air duct 1 and pull it diagonally upward. For example, although not shown in the figures, a configuration that can guide the lower part of the air duct 1 diagonally upward while supporting it with surface contact may be adopted. 【0070】 Furthermore, in the above embodiment, a configuration was illustrated in which the cleaned air duct 1 can be further compressed from its contracted state by opening and closing a pair of arm portions 17, 17, but of course, it is not limited to this. For example, although not shown in the figures, a mechanism that can move downward while reducing its diameter by the operator's operation may be applied to further compress the air duct 1 in its contracted state. 【0071】 Furthermore, in the above embodiment, an example was given in which the cleaning fluid supply pipe 28 is erected from the center of the first mounting base 20 and configured to pass through the center of the air duct 1, but other configurations are also possible. For example, although not shown in the figures, the upper part of the curved portion or the portion extending diagonally upward of the cleaning fluid supply pipe 28 may be shaped to contact the inner surface 1c of the air duct 1 and guide the air duct 1 diagonally upward. By doing so, the air duct 1 can be introduced into the diagonal guide portion 15 even more smoothly, thereby further improving the workability related to extension. [Explanation of Symbols] 【0072】 1 windpipe 1a One end 1b Other end 1c Inner surface 1d external surface 10 Wind pipe cleaning device 11 First loading section 12 Second loading section 13 Cleaning fluid spray unit 14. Gas injection section 15. Oblique guide section 16 Annular member 17,17 Pair of arm sections 18 Opening and closing mechanism 19 Bogie section 20 First mounting table 21 Second mounting platform 22, 22 Pair of guide bars 23,23 Pair of first curved sections 24,24 A pair of second curved sections 25 Connection port (cleaning solution) 26 Cleaning fluid spray unit for internal surfaces 27 External cleaning fluid spray unit 28 Cleaning fluid supply pipe 29. Spray nozzle (cleaning solution) 30 arc-shaped piping 31 Lid member 32 Connection port (gas) 33 Internal gas injection unit 34 External gas injection unit 35 Gas supply pipe 36. Injection nozzle (gas) 37. Arc-shaped piping 38 pedals 39. Biasing member 40 Link mechanism

Claims

[Claim 1] A device for cleaning a retractable air duct, A first mounting section on which the deflated air duct can be placed, The aforementioned air duct includes a cleaning fluid spraying unit capable of spraying cleaning fluid, In a duct cleaning device comprising a gas injection unit capable of injecting gas into the aforementioned duct, The system further includes an oblique guide section capable of guiding the air duct diagonally upward while extending the air duct that is placed on the first mounting section, The cleaning liquid spraying unit is positioned so as to be able to spray the cleaning liquid into the air duct, which is guided diagonally upward by the oblique guide unit, and the gas spraying unit is positioned forward in the guide direction from the area where the cleaning liquid is sprayed, so as to be able to spray the gas into the air duct. The air duct cleaning device is characterized in that the oblique guide section has a pair of guide bars that are parallel to each other and extend diagonally upward, and are capable of supporting the lower part of the air duct. [Claim 2] The air duct cleaning device according to claim 1, wherein the oblique guide portion is located on the rear side in the guide direction of the pair of guide bars and further comprises a pair of first curved portions that curve from below diagonally upward and connect to the pair of guide bars. [Claim 3] A device for cleaning a retractable air duct, A first mounting section on which the deflated air duct can be placed, The aforementioned air duct includes a cleaning fluid spraying unit capable of spraying cleaning fluid, In a duct cleaning device comprising a gas injection unit capable of injecting gas into the aforementioned duct, The system further includes an oblique guide section capable of guiding the air duct diagonally upward while extending the air duct that is placed on the first mounting section, The cleaning liquid spraying unit is positioned so as to be able to spray the cleaning liquid into the air duct, which is guided diagonally upward by the oblique guide unit, and the gas spraying unit is positioned forward in the guide direction from the area where the cleaning liquid is sprayed, so as to be able to spray the gas into the air duct. The cleaning fluid spraying unit comprises a cleaning fluid supply pipe extending upward from the first mounting unit and curving to extend diagonally upward, and an internal cleaning fluid spraying unit provided at the tip of the cleaning fluid supply pipe, capable of spraying the cleaning fluid onto the inner surface of the air duct. Wind pipe cleaning device. [Claim 4] The air duct cleaning device according to claim 3, wherein the cleaning fluid supply pipe is configured to be rotatable around a vertical axis. [Claim 5] The system further comprises an annular member disposed around the aforementioned oblique guide portion, The air duct cleaning device according to claim 3, wherein the cleaning liquid spraying unit is provided on the inner surface of the annular member and further comprises an outer surface cleaning liquid spraying unit capable of spraying the cleaning liquid toward the outer surface of the air duct. [Claim 6] A device for cleaning an extendable air duct, A first mounting section on which the deflated air duct can be placed, The aforementioned air duct includes a cleaning fluid spraying unit capable of spraying cleaning fluid, In a duct cleaning device comprising a gas injection unit capable of injecting gas into the aforementioned duct, The system further includes an oblique guide section capable of guiding the air duct diagonally upward while extending the air duct that is placed on the first mounting section, The cleaning liquid spraying unit is positioned so as to be able to spray the cleaning liquid into the air duct, which is guided diagonally upward by the oblique guide unit, and the gas spraying unit is positioned forward in the guide direction from the area where the cleaning liquid is sprayed, so as to be able to spray the gas into the air duct. The system further comprises a second mounting section on which the air duct, which has been cleaned by the cleaning fluid spraying section, can be placed in a retracted state, The gas injection unit comprises a gas supply pipe extending upward from the second mounting unit and curving downward diagonally, and an internal gas injection unit provided at the tip of the gas supply pipe and capable of injecting gas into the inner surface of the air duct. A duct cleaning device further comprising: a pair of arm sections that allow the duct to be placed on the second mounting section when open and that can further compress the duct when it is in a retracted state when closed; and an opening and closing mechanism that allows the pair of arm sections to be opened and closed. [Claim 7] The system further comprises an annular member disposed around the aforementioned oblique guide portion, The air duct cleaning device according to claim 6, wherein the gas injection unit is provided on the inner surface of the annular member and further comprises an outer surface gas injection unit capable of injecting the gas toward the outer surface of the air duct. [Claim 8] The air duct cleaning device according to claim 6, wherein the opening and closing mechanism comprises a pedal that can be pressed down, a biasing member that pushes the pedal up against the force of pressing down on the pedal, and a link mechanism that connects the pedal and the pair of arms such that the pair of arms are closed when the pedal is pressed down and the pair of arms are opened when the pedal is released.

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