JP2023090319A - Cleaning device and cleaning method - Google Patents

Abstract

To provide a cleaning device and a cleaning method which can reduce costs for maintenance and consumable materials and efficiently clean a placing joint surface.SOLUTION: A cleaning device according to one embodiment is the cleaning device 1 for a fragile product B of a placing joint surface S of a cement-based hardened body. The cleaning device 1 comprises: a base body 2 which has a travel mechanism on the lower part; a hollow tube 4 which has an air jet nozzle that jets the air E to the placing joint surface S on the front side of the base body 2; and a support member 5 which supports the hollow tube 4 on the front side of the base body 2. The support member 5 includes an angle change mechanism 10 which supports the hollow tube 4 and can change the orientation of the air E in the plan view to an inclined direction.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to a cleaning device and cleaning method for cleaning fragile objects on a joint surface.

Patent Literature 1 describes a green-cut work vehicle used for treatment of concrete joint surfaces during dam construction work. The green-cut work vehicle is provided with a cleaning brush for removing debris from the joint surface of concrete and a debris recovery mechanism. The cleaning brush is composed of four rotating brushes arranged under the vehicle body of the work vehicle. The dust collecting mechanism is arranged behind the cleaning brush.

The waste collection mechanism is composed of a collection brush, a conveyor, and a collection tank. The debris removed from the joint surface by the cleaning brush is sent toward the collection brush. Collection brushes bounce the debris onto the conveyor. The waste thrown up on the conveyor is transported to the collection tank and stored in the collection tank. Immediately behind the driver's seat of the green cutting work vehicle, there is a machine room that houses a power engine that drives the cleaning brushes, recovery brushes, conveyors, etc., and a hydraulic drive mechanism that drives the cleaning brushes by hydraulic pressure through hydraulic pipes. are placed.

JP-A-10-85681

As in the green-cut work vehicle described above, cleaning of the joint surface before placing is performed by cleaning brushes and recovery brushes. However, cleaning with a brush is likely to cause failures due to, for example, adhesion of cement-containing rolling shear to the brush, and may require a great deal of maintenance costs. In addition, when the area of the joint surface is large, the brushes are worn out, and costs such as replacement of the brushes may arise. Furthermore, since the joint surface may have a step or the like, there may arise a problem that cleaning cannot be efficiently performed with a brush.

An object of the present disclosure is to provide a cleaning device and a cleaning method capable of reducing the cost of maintenance and consumables and efficiently cleaning the joint surface.

A cleaning device according to the present disclosure is a cleaning device for fragile objects on the joint surface of cement-based hardening bodies. The cleaning device includes a base body having a running mechanism at its lower portion, a hollow tube having an air jet nozzle for jetting air onto a joint surface in front of the base body, and a support member supporting the hollow tube in front of the base body. Prepare. The support member supports the hollow tube and has an angle changing mechanism capable of changing the direction of the air in a plane view to an inclined direction.

In this cleaning device, a hollow tube is provided in front of a substrate having a traveling mechanism, and an air ejection nozzle attached to the hollow tube ejects air onto the joint surface of the cement-based hardening body. Therefore, since the base body can blow air onto the joint surface while traveling, the air can efficiently remove fragile objects from the joint surface, and even if there is a step on the joint surface, the joint surface can be maintained. Cleaning can be efficiently performed. Since no brush is required, it is possible to suppress the occurrence of failures and reduce maintenance costs. In addition, even on a wide spliced surface, it is possible to remove fragile objects by blowing air onto the spliced surface from an air blowing nozzle attached in front of the running substrate, so consumables such as brushes are not required. cost can be reduced. Furthermore, since the fragile object is removed by the air and the direction of the air is inclined in plan view with respect to the traveling direction of the base, the fragile object can be moved to one side of the base by blowing air. Therefore, since the air pushes the fragile object to one side while the base body is traveling, the fragile object can be efficiently removed from the joint surface and the cleaning can be efficiently performed.

The cleaning method according to the present disclosure includes a substrate having a running mechanism at the bottom, a hollow tube having an air ejection nozzle for ejecting air onto the joint surface of the cement-based hardening body in front of the substrate, and a hollow tube in front of the substrate. In this cleaning method, fragile objects on a joint surface are cleaned by a cleaning device having a support member that supports a pipe. In the cleaning method, the hollow tube is supported in a state inclined with respect to the traveling direction of the substrate in a plan view, and air is ejected from the air ejection nozzle onto the joint surface, and the substrate moves out of the traveling area of the substrate as the substrate travels. A step of removing the fragile object is provided.

In this cleaning method, the hollow tube attached to the front of the substrate has an air ejection nozzle, and air is ejected from the air ejection nozzle to the joint surface of the cement-based hardened body, so there are no steps on the joint surface. Cleaning can be done efficiently. Since this cleaning method does not require a brush, failures can be suppressed and maintenance costs can be reduced. Furthermore, the cost of consumables can be reduced. Further, the direction of the air jetted from the air jetting nozzle is set so as to be inclined with respect to the running direction of the base body, and the air removes fragile objects on the joint surface outside the running region of the base body. Therefore, since the fragile object can be pushed to one side by air while the substrate is running, the fragile object can be efficiently removed and cleaned easily.

The cleaning method may further comprise collecting fragile objects using a bucket. In this case, the fragile material removed from the joint surface can be efficiently collected by the bucket.

In the above-described step of removing fragile objects, the orientation of the air in the horizontal direction with respect to the traveling direction of the substrate may be set to 3° or more and 60° or less. Since the direction of the air is 3° or more with respect to the traveling direction, the fragile object can be more reliably pushed to one side of the base by the air. By setting the direction of the air to 60° or less with respect to the running direction, it is possible to prevent the hollow tube from coming into contact with the front portion of the base.

The cleaning device may include a camera that captures the location where the air is ejected. The step of removing the fragile object may include the step of capturing with a camera the location where the air is ejected. In this case, it is possible to confirm the image captured by the camera and visually confirm the location where the air is blown. Therefore, it is possible to visually check whether or not the fragile object has been removed from the front side of the substrate by the jet of air.

According to the present disclosure, it is possible to reduce the cost of maintenance and consumables, and to efficiently clean the joint surface.

1 is a perspective view showing an example of a cleaning device and a joint surface according to an embodiment; FIG. (a) is a perspective view showing a cleaning device according to an embodiment. (b) is an enlarged view of an air ejection nozzle. (a) is a plan view of the cleaning device schematically showing an angle changing mechanism. (b) is a side view of the cleaning device schematically showing an angle changing mechanism. (a) is a perspective view schematically showing a camera attached to the cleaning device. (b) is a perspective view showing an exemplary monitor displaying the image captured by the camera of (a); (a) is a plan view of the cleaning device schematically showing a state in which the direction of air from an air injection nozzle is tilted with respect to the running direction. (b) is a plan view of the cleaning device schematically showing a state in which the direction of air from the air injection nozzle is not tilted with respect to the running direction.

Hereinafter, embodiments of a cleaning device and a cleaning method according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and duplicate descriptions are omitted as appropriate. In addition, the drawings may be partially simplified or exaggerated for easy understanding, and the dimensional ratios and the like are not limited to those described in the drawings.

FIG. 1 shows an exemplary site A to which the cleaning device and cleaning method according to this embodiment are applied. For example, at Site A, concrete materials for building a central impermeable rockfill dam, a trapezoidal CSG dam, or an RCD concrete dam are transported and compacted by construction machinery.

Concrete material placement takes between 3 and 48 hours. Conveying and compacting of the concrete material are sequentially performed by each of the plurality of construction machines. The construction machine includes, for example, vibrating rollers and buckets, which collect fragile objects cleaned by the cleaning device 1 .

At site A, for example, hard-mixed concrete is placed, and the placed hard-mixed concrete is compacted by vibrating rollers. The maximum coarse aggregate size of hard-mixed concrete is 40 mm or more and 200 mm or less, and the unit cement content of hard-mix concrete is 90 kg/m ³ or more and 180 kg/m ³ or less. The water-cement ratio of hard-mixed concrete is 40% or more and 120% or less, and the slump value of hard-mixed concrete is 3 cm or less. The hard-mixed concrete is hardened after being placed into a hardened cementitious body.

Also, at the site A, for example, CSG material is placed and compacted by vibrating rollers. The maximum coarse aggregate size of the CSG material is 40 mm or more and 90 mm or less, and the unit cement amount of the CSG material is 50 kg/m ³ or more and 160 kg/m ³ or less. The CSG material has a water-cement ratio of greater than or equal to 40% and less than or equal to 120%. After the CSG material is placed, it hardens into a cementitious hardened body.

At the site A, a green cut is performed before the concrete material such as hard-mixed concrete or CSG material described above is placed. That is, a green cut is performed by jetting high-pressure air or water onto a joint surface S (surface) formed by cement-based hardened concrete that has already been placed. The cleaning device 1 according to this embodiment is, for example, a green cut machine that performs a green cut.

In the present embodiment, the cleaning device 1 cleans the joint surface S to remove fragile objects (laitance, shear). As an example, fragile objects are removed at a depth of 1 mm or more and 10 mm or less from the joint surface S. For example, a site A where a dam is constructed has a wide joint surface S, and a considerable number of cleaning devices 1 are required. As an example, at the site A, three cleaning devices 1 clean the joint surface S to remove fragile objects. The cleaning device 1 cleans the joint surface S by jetting air.

FIG. 2(a) is a perspective view showing the cleaning device 1 according to this embodiment. As shown in FIGS. 1 and 2(a), the cleaning device 1 supports a substrate 2, a hollow tube 4 having an air ejection nozzle 3 for ejecting air onto a joint surface S, and a hollow tube 4. and a support member 5 for The base 2 is, for example, a vehicle body having a running mechanism 2b at its lower portion. In this case, a worker can ride on the base body 2, and the worker can clean the base body 2 while driving it. As an example, the base body 2 is a truck vehicle (eg, 2t vehicle).

A hollow tube 4 is supported by a support member 5 in front of the base body 2 . The air ejection nozzle 3 is fixed to the hollow tube 4 and ejects the air supplied to the inside of the hollow tube 4 onto the joint surface S located below the hollow tube 4 . The hollow tube 4 is connected via a hose 7 to, for example, a compressor 6 placed on the carrier 2c of the base body 2. As shown in FIG. The hose 7 extends from above the loading platform 2c through the longitudinal end of the front window 2d of the base body 2 to the hollow tube 4. As shown in FIG.

Compressed air from compressor 6 is supplied to hollow tube 4 via hose 7 . As an example, the compressed air flow rate of the compressor 6 is 11 m ³ /min, and the air discharge pressure of the compressor 6 is 0.7 MPa. The air supplied from the compressor 6 to the air ejection nozzle 3 through the hose 7 and the hollow tube 4 is ejected from the air ejection nozzle 3 onto the joint surface S. The strength of the cement-based hardened body on the joint surface S by jetting air from the air jetting nozzle 3 is, for example, 0.2 N/mm ² or more and 3.0 N/mm ² or less. That is ^, the ^strength of the cement-based hardened body that has been placed increases with the passage of time. It is preferable to clean S.

The hollow tube 4 extends in a direction D2 that intersects the traveling direction D1 of the base body 2 . The direction D2 intersects both the traveling direction D1 and the width direction D3 of the substrate 2 . FIG. 2(b) is an enlarged view of an exemplary air ejection nozzle 3. FIG. As shown in FIG. 2(b), the air ejection nozzle 3 includes a cylindrical portion 3b attached to the hollow tube 4 and a flat portion 3c located at the end of the cylindrical portion 3b opposite to the hollow tube 4. and As an example, the cylindrical portion 3b has a cylindrical shape. For example, the inner diameter of the tubular portion 3b is 10 mm. As an example, the flat portion 3c has a length L of 15 mm and a thickness of 2 mm.

The hollow tube 4 has, for example, a plurality of air ejection nozzles 3, and the plurality of air ejection nozzles 3 are arranged at predetermined intervals so as to line up along the direction D2. Also, the direction in which the air from the air ejection nozzle 3 is ejected (the direction of the air) is substantially perpendicular to the direction D2 in which the hollow tube 4 extends. As an example, the hollow tube 4 has 11 air ejection nozzles 3, and air is supplied from the compressor 6 to the 11 air ejection nozzles 3 at a flow rate of 11 m ³ /min. In this case, 1 m ³ /minute of air is jetted onto the joint surface S from each air jet nozzle 3 .

For example, wheels 8 are attached to the hollow tube 4 via attachment members 9 . A wheel 8 and a mounting member 9 are provided at each end of the hollow tube 4 . The wheel 8 is a guide wheel provided to prevent the air ejection nozzle 3 from coming into contact with the joint surface S. As shown in FIG. That is, since the lower end of the wheel 8 is positioned above the lower end of the air ejection nozzle 3 , the contact of the air ejection nozzle 3 with the joint surface S can be avoided by the contact of the wheel 8 with the joint surface S.

A support member 5 supports the hollow tube 4 in front of the base body 2 . The support member 5 is fixed to the lower portion of the front body 2f of the base 2 between the pair of front lights 2g. As shown in FIGS. 2(a), 3(a) and 3(b), the support member 5 is in a state in which the direction of the air E ejected from the air ejection nozzle 3 is inclined with respect to the running direction D1. has an angle changing mechanism 10 that supports the hollow tube 4 at . The angle changing mechanism 10 can change the direction of the air E from a non-tilted state to a tilted state with respect to the traveling direction D1.

For example, the angle changing mechanism 10 has a horizontal tilting mechanism 11 and a vertical tilting mechanism 12 . A horizontal tilting mechanism 11 and a vertical tilting mechanism 12 are provided between the base 2 and the hollow tube 4 . As an example, the horizontal tilting mechanism 11 is provided closer to the base 2 than the vertical tilting mechanism 12 is. Since the angle changing mechanism 10 has the horizontal tilting mechanism 11 and the vertical tilting mechanism 12, a hydraulic cylinder or the like can be omitted, so that the angle changing mechanism 10 can have a simple structure. This cost increase can be suppressed.

Each of the horizontal tilting mechanism 11 and the vertical tilting mechanism 12 is composed of, for example, a pair of ratchets capable of rotating only in one direction. In the horizontal tilting mechanism 11 and the vertical tilting mechanism 12, for example, the rotatable direction of one of the pair of ratchets and the rotatable direction of the other are opposite to each other, so that the angle is changed. can be fixed with

For example, in the horizontal tilting mechanism 11, it is possible to fix the hollow tube 4 in a state where the direction of the hollow tube 4 is changed around the shaft 11b extending in the vertical direction. In the vertical tilting mechanism 12, the hollow tube 4 can be fixed while the height position of the hollow tube 4 is changed around the shaft 12b extending in the width direction D3. Therefore, the direction of the air E with respect to the traveling direction D1 and the height of the air ejection nozzle 3 can be adjusted.

As shown in FIGS. 4(a) and 4(b), the cleaning device 1 includes a camera 13 for photographing a portion of the joint surface S to which the air E is blown, and an image photographed by the camera 13. and a monitor 14 to be displayed. For example, the camera 13 is fixed on the base 2 at a position adjacent to the side mirror 2h. The monitor 14 is directed toward the driver's seat of the base 2 while placed on the upper surface of the dashboard 2j of the base 2, for example. As a result, the operator can visually recognize the portion of the joint surface S where the air E is being blown by looking at the monitor 14 while driving the base body 2 .

Next, a cleaning method according to this embodiment will be described. First, as shown in FIGS. 3(a) and 3(b), by changing the direction of the hollow tube 4 supported by the support member 5, the air ejection nozzle 3 attached to the hollow tube 4 is to set the direction of the air E ejected from (step of setting the direction of the air). At this time, the vertical tilting mechanism 12 sets the height and direction of the air ejection nozzle 3 with respect to the joint surface S, and the horizontal tilting mechanism 11 sets the angle θ of the air E in the horizontal direction with respect to the running direction D1. . For example, the value of the angle θ to be set is 3° or more and 60° or less. However, the value of the angle θ may be 5° or more, or 10° or more, or 30° or less, 20° or less, or 15° or less.

After setting the direction of the air E ejected from the air ejection nozzle 3 as described above, as shown in FIG. By running the base body 2 on the splicing surface S, the fragile object B on the splicing surface S is removed (step of removing the fragile object). At this time, the air E removes the fragile object B out of the travel region R of the base 2 . The direction of the air E ejected from the air ejection nozzle 3 is set by changing the inclination (direction) of the hollow tube 4 in plan view. Accordingly, the plurality of air ejection nozzles 3 are arranged along the hollow tube 4 in a line in the extending direction D2. Therefore, the fragile object B on the joint surface S can be uniformly blown off to the outside of the running area R.

When the base body 2 travels while ejecting the air E from the air ejection nozzle 3 onto the joint surface S, the camera 13 photographs the location where the air E is ejected (step of photographing by the camera). The captured image is confirmed by viewing the monitor 14 . Thereby, it becomes possible to grasp whether or not the fragile object B is appropriately removed from the travel area R by the air E.

By the way, if the direction of the air E in plan view is not tilted with respect to the traveling direction D1, as shown in FIG. removed. In this case, since the fragile objects B are dispersed on both the left and right sides, recovery of the fragile objects B may be complicated.

On the other hand, in the present embodiment, as shown in FIG. 5A, the direction of the air E in plan view is inclined with respect to the traveling direction D1. It is brought to one side of R. By repeating the operation of bringing the fragile object B to one side of the travel region R by moving the base 2, the fragile object B can be deposited on the one side. Then, the fragile object B deposited on one side is recovered by the bucket (step of recovering the fragile object). After repeating the above steps, the series of steps of the cleaning method according to the present embodiment is completed.

Next, the effects obtained from the cleaning device 1 and the cleaning method according to this embodiment will be described in detail. In the cleaning device 1 and the cleaning method according to the present embodiment, the hollow tube 4 is provided in front of the base body 2 having the traveling mechanism 2b, and the air ejection nozzle 3 attached to the hollow tube 4 irradiates the joint surface S with air. Spout out E. Therefore, since the base body 2 can eject the air E onto the joint surface S while traveling, the fragile object B can be efficiently removed from the joint surface S by the air E, so that the joint surface S can be smoothed. Even if there is, the joint surface S can be cleaned efficiently.

In addition, since a conventionally used brush for rubbing the splicing surface S can be dispensed with, the occurrence of failures can be suppressed and maintenance costs can be reduced. In other words, when a brush is used, there is a possibility that the cement-containing roller crushing or the like adheres to the brush, and the adherence of the transfer or the like to the brush can cause a failure. Furthermore, consumables such as brushes are consumed when cleaning a particularly wide splicing surface S, so there is a problem that the cost of replacement is high.

However, in this embodiment, since the air E removes the fragile object B, it is possible to clean the joint surface S without contact, thereby reducing the possibility of failure of the cleaning device 1. be able to. In addition, in the present embodiment, the fragile object B can be removed by ejecting the air E from the air ejection nozzle 3 attached to the front of the running base 2 onto the joint surface S even on the wide joint surface S. Therefore, the cost of consumables such as the brush can be reduced.

Furthermore, in this embodiment, the fragile object B is removed by the air E, and the direction of the air E in plan view is inclined with respect to the traveling direction D1 in which the base 2 travels. A fragile object B can be brought to one side. Therefore, since the air E pushes the fragile object B to one side while the base body 2 is traveling, the fragile object B can be efficiently removed from the joint surface S and the cleaning can be efficiently performed.

The cleaning method according to this embodiment further includes a step of collecting the fragile object B using a bucket. Therefore, the fragile object B removed from the joint surface S can be efficiently recovered by the bucket.

In this embodiment, in the step of setting the direction described above, the direction (angle θ) of the air E in the horizontal direction with respect to the traveling direction D1 in which the base 2 travels is set to be 3° or more and 60° or less. . Since the orientation of the air E in the horizontal direction with respect to the running direction D1 is 3° or more, the air E can more reliably move the fragile object B to one side of the base 2 . Since the direction of the air E with respect to the running direction D1 is 60° or less, the hollow tube 4 can be prevented from coming into contact with the front portion of the base 2 .

The cleaning device 1 according to this embodiment includes a camera 13 that captures an image of the location where the air E is jetted. The step of removing the fragile object B includes a step of photographing the place where the air E is jetted by the camera 13 . Therefore, it is possible to confirm the image inside the base body 2 and visually recognize the place where the air E is ejected. Therefore, it is possible to visually check whether or not the fragile object B is removed from the front of the base 2 by the ejection of the air E.

The embodiments of the cleaning device and cleaning method according to the present disclosure have been described above. However, the cleaning device and cleaning method according to the present disclosure are not limited to the above-described embodiments, and can be modified as appropriate within the scope of the claims. That is, the configuration, shape, size, number, material and arrangement of each part of the cleaning device, and the contents and order of the steps of the cleaning method are not limited to the above-described embodiments and can be changed as appropriate.

For example, in the above-described embodiment, the cleaning device 1 includes the base body 2 having the hollow tube 4 to which the air ejection nozzle 3 is attached, and the fragile object B is removed by ejecting the air E onto the joint surface S. The cleaning device 1 has been described. However, the substrate may further include a pipe to which a water jetting nozzle is attached, and the cleaning device may jet water onto the joint surface to remove fragile objects. In this case as well, the fragile object is drawn to one side of the running area of the substrate by the water, so that the same effects as in the above-described embodiment can be obtained.

Further, in the above-described embodiment, the cleaning device 1 including the support member 5 provided with the angle changing mechanism 10 having the horizontal tilting mechanism 11 and the vertical tilting mechanism 12 has been described. However, the configuration of the angle changing mechanism is not limited to the configuration having the horizontal tilting mechanism 11 and the vertical tilting mechanism 12 . For example, it may be an angle changing mechanism equipped with a hydraulic cylinder that changes the orientation of the hollow tube and the air ejection nozzle. In this case, it is possible to change the orientation of the hollow tube and the air ejection nozzle during running. becomes.

DESCRIPTION OF SYMBOLS 1... Cleaning device, 2... Base|substrate, 2b... Traveling mechanism, 2c... Cargo platform, 2d... Front window, 2f... Front body, 2g... Front light, 2h... Side mirror, 2j... Dashboard, 3... Air ejection nozzle, 3b Cylinder portion 3c Flat portion 4 Hollow tube 5 Supporting member 6 Compressor 7 Hose 8 Wheel 9 Mounting member 10 Angle changing mechanism 11 Horizontal tilting mechanism 11b... Shaft, 12... Vertical tilting mechanism, 12b... Shaft, 13... Camera, 14... Monitor, A... Field, B... Vulnerable object, D1... Running direction, D2... Direction, D3... Width direction, E... Air, R: running area, S: joint surface, θ: angle.

Claims (5)

A cleaning device for fragile objects on the joint surface of a cement-based hardening body,
a base body having a running mechanism at the bottom;
a hollow tube having an air ejection nozzle for ejecting air onto the joint surface in front of the base;
a support member that supports the hollow tube in front of the base;
with
The support member supports the hollow tube and has an angle changing mechanism capable of changing the direction of the air in a plane view to an inclined direction,
cleaning equipment. A base body having a running mechanism at its lower portion, a hollow tube having an air jetting nozzle for jetting air onto the joint surface of the cement-based hardening body in front of the base body, and a support supporting the hollow tube in front of the base body. A cleaning method for cleaning fragile objects on the joint surface with a cleaning device having a member,
The hollow tube is supported in a state inclined with respect to the running direction of the base body in a plan view, and air is jetted from the air jetting nozzle to the joint surface, and along with the running of the base body, the running area of the base body is expanded. removing the fragile object out of
Cleaning method. Further comprising a step of recovering the fragile object using a bucket;
The cleaning method according to claim 2. In the step of removing the fragile object, the direction of the air in the horizontal direction with respect to the traveling direction of the base is set to be 3° or more and 60° or less.
The cleaning method according to claim 2 or 3. The cleaning device includes a camera that captures the location where the air is blown,
The step of removing the fragile object includes the step of photographing the place where the air is ejected by the camera,
The cleaning method according to any one of claims 2-4.

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