CN112609551A

CN112609551A - Road marking grinds except that device

Info

Publication number: CN112609551A
Application number: CN202110042276.6A
Authority: CN
Inventors: 朱昌齐
Original assignee: Anhui Lu'an Highway And Bridge Engineering Co ltd
Current assignee: Anhui Lu'an Highway And Bridge Engineering Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-04-06

Abstract

The invention provides a road marking grinding device, belongs to the technical field of road construction equipment, and is used for solving the technical problems that the existing road marking removing device cannot effectively clean dust and debris while removing road markings and timely repair the road surfaces. The cleaning and spraying device comprises a vehicle body and a shell, wherein a placing rack is arranged on the side surface of the vehicle body, the shell is arranged on the side surface of the placing rack in a sliding manner, a wire removing mechanism, a cleaning mechanism and a spraying mechanism are sequentially arranged in the shell, a water tank and a dust collection box are sequentially fixed above the placing rack, a drying mechanism and a paint spraying mechanism are arranged below the placing rack, a water pump is fixed in the water tank, the water outlet end of the water pump is connected with a water outlet pipe, a suction fan is arranged above the dust collection box, the air inlet end of the; this road marking grinds except that device can effectively clear away dust and piece when polishing and striking off the marking, avoids environmental pollution to road to removing after the line washs stoving and restores.

Description

Road marking grinds except that device

Technical Field

The invention belongs to the technical field of road construction equipment, and relates to a road marking grinding device.

Background

The road marking is a mark for transmitting traffic information such as guidance, limitation, warning and the like to traffic participants by lines, arrows, characters, elevation marks, raised road signs, contour marks and the like on the road surface of the road, and comprises a hot melt marking, a normal temperature cold paint marking, a colored anti-skid marking, an oscillation anti-skid reflective marking and a preformed marking, and the mark has the functions of controlling and guiding traffic, can be used in cooperation with the mark, and can also be used independently.

If the road marking needs to be changed or when changing, just need get rid of original marking, the road removes traditional thread binding putting and is used for high number highway, the professional equipment of road marking is clear away to urban road etc. it has replaced the workman to have cleared away the working method of old marking with the hammer hammering, however, current removes traditional thread binding putting when work, can produce a large amount of dust and piece, pollution has been caused to the environment, the damage that causes the road surface can not in time be restoreed, and polish and produce high temperature when removing the line, can produce the damage to the head of polishing.

Therefore, the road marking grinding device is designed, which can effectively remove dust and debris, avoid environmental pollution, and clean, dry and repair the road after the marking is removed.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a road marking grinding device, which aims to solve the technical problems that: how to realize effectively clearing up dust and piece when cleaing away the road marking to in time restore the road surface.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a road marking grinds except that device, which comprises a carriage body and a housing, car side is provided with the rack, the rack side slides and is provided with the casing, the inside line removing mechanism that is equipped with in proper order of casing, clean the mechanism and spray the mechanism, the rack top is fixed with water tank and dust collection box in proper order, the rack below is equipped with stoving mechanism and the mechanism that sprays paint, the inside of water tank is fixed with the water pump, the play water end of water pump is connected with the outlet pipe, the outlet pipe stretches into inside the casing, the tip and the mechanism that sprays of outlet pipe are connected, the dust collection box top is equipped with the suction fan, the air inlet end of suction fan is connected with the dust absorption pipe, the air-out end and the dust collection.

The working principle of the invention is as follows: suction fan and water pump all with automobile body electric connection, start the automobile body, open suction fan and water pump, will remove the region that line mechanism aims at needs and gets rid of the marking, in-process advancing, remove line mechanism and polish and strike off the marking, produced piece and dust are covered by the casing when striking off the marking, after cleaning the mechanism and cleaning, the suction fan passes through fan housing one and inhales piece and dust suction pipe, and collect inside the dust collection box through the dust suction pipe, avoid causing the pollution to the environment, can produce very high heat and raise dust at the in-process of polishing, the water pump is cooled down and is eliminated the raise dust to removing line mechanism through spraying the mechanism, part ground after wasing has ponding, drying mechanism carries out quick air-drying to the ground that has ponding, and finally, the mechanism of spraying paint is repaired to the ground after drying.

The side of the shell is fixedly provided with a second motor, the second motor is electrically connected with the vehicle body, the wire removing mechanism comprises a fixed shaft, one end of the fixed shaft is rotatably arranged in the shell, the other end of the fixed shaft is fixed on an output shaft of the second motor, and a knife sharpening roller is fixed on the fixed shaft.

By adopting the structure, the output shaft of the second motor drives the fixed shaft to rotate, so that the knife grinding roller is driven to rotate, and the mark line on the ground is quickly ground and scraped.

The cleaning mechanism comprises two fixed rollers which are fixed on the side face of the shell, fixed shafts are fixed on the fixed rollers, a third motor is arranged at the lower end of each fixed shaft and electrically connected with the automobile body, a rotating disc is fixed on an output shaft of the third motor, and a plurality of cleaning brushes are arranged below the rotating disc.

By adopting the structure, the output shaft of the motor III drives the rotating disc to rotate, so that the cleaning brush is driven to rotate, the remained chips and dust on the ground are cleaned, and the environment pollution caused by the chips and the dust is prevented.

The spraying mechanism comprises a first spraying pipe and a second spraying pipe, the first spraying pipe and the second spraying pipe are both connected with the tail end of the water outlet pipe, the first spraying pipe is located behind the rotating disk, the second spraying pipe is located above the blade in an inclined mode, the first spraying pipe is provided with a plurality of first spraying heads, and the second spraying pipe is provided with a plurality of second spraying heads.

By adopting the structure, the water pump sends water into the second water spraying pipe through the water outlet pipe, the second spray nozzle sprays the water, the cutter blade is cooled, the water pump sends the water into the first water spraying pipe through the water outlet pipe, the first spray nozzle sprays the water, raised dust is removed, and the ground is cleaned.

Drying mechanism includes the air-dry district, and the air-dry district is fixed in the rack below, and the inside electric plate that is equipped with in air-dry district, electric plate and automobile body electric connection, the top of water tank are fixed with the air exhauster, water tank and automobile body electric connection, and the air-out end of air exhauster is equipped with out the tuber pipe, and the end that goes out the tuber pipe is connected with the air-dry district.

The structure more than adopting, open the air exhauster, the air inlet cover is delivered to the air-dry district with the wind that the air exhauster produced, and the electric plate heats wind, forms hot-blastly, carries out quick air-drying to the ground that has ponding.

The utility model discloses a paint spraying device, including rack, spray paint mechanism, spray paint pump and automobile body electric connection, the rack top is fixed with the spray paint case, and the mechanism that sprays paint includes the area of spraying paint, and the area of spraying paint is fixed in the rack below, and the area of spraying paint is located the rear in air-dried area, and the area of spraying paint below is equipped with a plurality of spray paint heads, and the incasement portion that sprays paint is equipped with the spray paint pump, spray paint pump and automobile.

Structure more than adopting, open the pump that sprays paint, the pump that sprays paint will spray paint the inside spraying paint of incasement portion and send into the liquid feed pipe, and the liquid feed pipe will spray paint and send into the district that sprays paint, through the spraying head blowout, the ground after drying is sprayed paint and is restoreed.

Articulated on the casing have the connecting rod, and the dust collection box top is equipped with elevating system, and elevating system includes the fixed case, and the fixed case is fixed on the dust collection box, and the fixed case top is equipped with fixed protruding, and it has the lifting rod to articulate between fixed protruding and the connecting rod, and the mounting groove has been seted up to fixed incasement portion, and the inside articulated motor push rod that has of fixed incasement portion, motor push rod and automobile body electric connection, the end that stretches out of motor push rod is articulated with the lifting rod.

Structure more than adopting, open the motor push rod, thereby the length of motor push rod changes the incline direction of change derrick mast, utilizes the height of lever principle control casing, slides in the rack is inside during the altitude variation of casing, adjusts the position of casing, reduces the height of casing when driving away the ground marking, lifts up the casing after driving the completion.

Compared with the prior art, the road marking removal device has the following advantages:

1. the marking on the ground is quickly polished and scraped through the cooperation of the shell, the wire removing mechanism and the motor II;

2. the cleaning mechanism is matched with the motor III to clean the residual scraps and dust on the ground;

3. the dust collection pipe, the air inlet cover, the suction fan and the dust collection box are matched to clean and collect the scraps and the dust, so that the environment is prevented from being polluted;

4. through the cooperation of the water outlet pipe, the spraying mechanism and the water pump, the dust is removed, the ground is cleaned, and the cutter blade is cooled;

5. the ground with accumulated water is quickly dried by matching the exhaust fan, the air inlet cover, the air drying area and the electric hot plate;

6. the dried ground is subjected to paint spraying repair through the matching of a paint spraying box, a paint spraying area and a slurry pump;

7. through elevating system and connecting rod cooperation, adjust the height of casing, the initial position and the end position of marking are clear away in the control, avoid causing unnecessary damage to ground.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic sectional view of the housing according to the present invention;

FIG. 3 is a schematic bottom view of a portion of the components of the present invention;

FIG. 4 is a schematic sectional view of the lifting mechanism of the present invention;

FIG. 5 is a perspective view of the sweeping mechanism of the present invention;

in the figure: 1-vehicle body, 2-dust suction pipe, 3-lifting mechanism, 301-fixed box, 302-motor push rod, 303-fixed protrusion, 304-mounting groove, 305-lifting rod, 4-connecting rod, 5-shell, 6-wire removing mechanism, 601-knife grinding roller, 602-fixed shaft, 7-air outlet pipe, 8-paint spraying box, 9-water tank, 10-cleaning mechanism, 1001-fixed roller, 1002-cleaning brush, 1003-fixed shaft, 1004-rotating disk, 11-exhaust fan, 12-air inlet cover, 13-water outlet pipe, 14-water spraying pipe I, 15-water spraying head I, 16-water spraying head II, 17-water spraying pipe II, 18-electric heating plate, 19-placing rack, 20-paint spraying area, 2001-paint spraying head, 21-air drying zone.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-5, the embodiment provides a road marking grinding device, which includes a vehicle body 1 and a housing 5, a placing rack 19 is disposed on a side surface of the vehicle body 1, the housing 5 is slidably disposed on a side surface of the placing rack 19, a line removing mechanism 6, a cleaning mechanism 10 and a spraying mechanism are sequentially disposed inside the housing 5, a water tank 9 and a dust collection box are sequentially fixed above the placing rack 19, a drying mechanism and a paint spraying mechanism are disposed below the placing rack 19, a water pump is fixed inside the water tank 9, a water outlet end of the water pump is connected with a water outlet pipe 13, the water outlet pipe 13 extends into the housing 5, an end portion of the water outlet pipe 13 is connected with the spraying mechanism, a suction fan is disposed above the dust collection box, an air inlet end of the suction fan is connected with a dust collection pipe 2, an air outlet end of the suction fan is;

suction fan and water pump all with 1 electric connection of automobile body, start automobile body 1, open suction fan and water pump, will remove the region that line mechanism 6 aims at needs and get rid of the marking, in-process advancing, remove line mechanism 6 and polish the striking off the marking, produced piece and dust are covered by casing 5 when striking off the marking, clean the back through mechanism 10, the suction fan passes through fan housing 12 and inhales piece and dust suction pipe 2, and collect inside the dust collection box through dust suction pipe 2, avoid causing the pollution to the environment, can produce very high heat and raise dust at the in-process of polishing, the water pump is cooled down and is eliminated the raise dust to removing line mechanism 6 through spraying the mechanism, part ground after wasing has ponding, stoving mechanism carries out quick air-drying to the ground that has ponding, and finally, the mechanism of spraying paint is repaired to the ground after the stoving.

A second motor is fixed on the side surface of the shell 5 and electrically connected with the vehicle body 1, the wire removing mechanism 6 comprises a fixed shaft 602, one end of the fixed shaft 602 is rotatably arranged in the shell 5, the other end of the fixed shaft 602 is fixed on an output shaft of the second motor, and a knife sharpening roller 601 is fixed on the fixed shaft 602; an output shaft of the second motor drives the fixed shaft 602 to rotate, so that the knife sharpening roller 601 is driven to rotate, and the mark lines on the ground are rapidly ground and scraped.

The cleaning mechanism 10 comprises two fixed rollers 1001, the two fixed rollers 1001 are fixed on the side surface of the shell 5, a fixed shaft 1003 is fixed on the fixed rollers 1001, a third motor is arranged at the lower end of the fixed shaft 1003 and electrically connected with the vehicle body 1, a rotary disc 1004 is fixed on an output shaft of the third motor, and a plurality of cleaning brushes 1002 are arranged below the rotary disc 1004; an output shaft of the motor III drives the rotating disc 1004 to rotate, so that the cleaning brush 1002 is driven to rotate, the residual debris and dust on the ground are cleaned, and the debris and the dust are prevented from polluting the environment.

The spraying mechanism comprises a first spraying pipe 14 and a second spraying pipe 17, the first spraying pipe 14 and the second spraying pipe 17 are both connected with the tail end of the water outlet pipe 13, the first spraying pipe 14 is positioned behind the rotating disc 1004, the second spraying pipe 17 is positioned above the blade 601 in an inclined manner, the first spraying pipe 14 is provided with a plurality of first nozzles 15, and the second spraying pipe 17 is provided with a plurality of second nozzles 16;

the water pump sends water into the second spray pipe 17 through the water outlet pipe 13, the water is sprayed out through the second spray head 16 to cool the blade 601, the water pump sends the water into the first spray pipe 14 through the water outlet pipe 13, the water is sprayed out through the first spray head 15 to remove dust, and the ground is cleaned.

The drying mechanism comprises an air drying area 21, the air drying area 21 is fixed below the placing rack 19, an electric heating plate 18 is arranged inside the air drying area 21, the electric heating plate 18 is electrically connected with the vehicle body 1, an exhaust fan 11 is fixed above the water tank 9, the water tank 9 is electrically connected with the vehicle body 1, an air outlet pipe 7 is arranged at the air outlet end of the exhaust fan 11, and the tail end of the air outlet pipe 7 is connected with the air drying area 21; the exhaust fan 11 is turned on, the air inlet cover 12 sends air generated by the exhaust fan 11 to the air drying area 21, the electric heating plate 18 heats the air to form hot air, and the ground with accumulated water is quickly dried.

A paint spraying box 8 is fixed above the placing rack 19, the paint spraying mechanism comprises a paint spraying area 20, the paint spraying area 20 is fixed below the placing rack 19, the paint spraying area 20 is located behind the air drying area 21, a plurality of paint spraying heads 2001 are arranged below the paint spraying area 20, a paint spraying pump is arranged inside the paint spraying box 8 and electrically connected with the vehicle body 1, a liquid outlet end of the paint spraying pump is connected with a liquid conveying pipe, and the tail end of the liquid conveying pipe is connected with the paint spraying area 20;

and (3) turning on a paint spraying pump, sending the paint inside the paint spraying box 8 into a liquid feeding pipe by the paint spraying pump, sending the paint into a paint spraying area 20 by the liquid feeding pipe, spraying out the paint through a paint spraying head 2001, and performing paint spraying repair on the dried ground.

The shell 5 is hinged with a connecting rod 4, a lifting mechanism 3 is arranged above the dust collection box, the lifting mechanism 3 comprises a fixed box 301, the fixed box 301 is fixed on the dust collection box, a fixed protrusion 303 is arranged above the fixed box 301, a lifting rod 305 is hinged between the fixed protrusion 303 and the connecting rod 4, an installation groove 304 is formed in the fixed box 301, a motor push rod 302 is hinged in the fixed box 301, the motor push rod 302 is electrically connected with the car body 1, and the extending end of the motor push rod 302 is hinged with the lifting rod 305;

the motor push rod 302 is opened, the length of the motor push rod 302 is changed, so that the inclination direction of the lifting rod 307 is changed, the height of the shell 5 is controlled by utilizing the lever principle, the shell 5 slides in the placing rack 19 when the height of the shell 5 is changed, the position of the shell 5 is adjusted, the height of the shell 5 is reduced when the ground mark is cleared, and the shell 5 is lifted after clearing is completed.

In this embodiment, the fixing manners are all the most common fixing connection manners in the field, such as welding, and the like, and the electrical components, such as the motor push rod 302, the vehicle body 1, the water pump, and the like, are all products in the prior art, and can be directly purchased and used in the market, and the specific principle is not described in detail.

The working principle of the invention is as follows:

starting the vehicle body 1, opening the exhaust fan 11, the water pump, the first motor 308, the second motor, the suction fan water pump, the slurry pump and the third motor, aligning the blade 601 to the region where the marked lines need to be removed, in the advancing process, the output shaft of the second motor drives the fixed shaft 602 to rotate, so that the rotary roller 603 is driven to rotate, the blade 601 is driven to do circular motion, the marked lines on the ground are quickly polished and scraped, and scraps and dust generated in the process of scraping the marked lines are covered by the shell 5;

an output shaft of the motor III drives the rotating disc 1004 to rotate, so that the cleaning brush 1002 is driven to rotate, the residual debris and dust on the ground are cleaned, and the environment pollution caused by the debris and the dust is prevented;

the suction fan sucks the scraps and dust into the dust collection pipe 2 through the air inlet cover 12, collects the scraps and the dust in the dust collection box through the dust collection pipe 2, and cleans and collects the scraps and the dust;

during polishing, high heat and raised dust are generated, water is sent to the second spray pipe 17 by the water pump through the water outlet pipe 13 and is sprayed out through the second spray head 16 to cool the blade 601, water is sent to the first spray pipe 14 by the water pump through the water outlet pipe 13 and is sprayed out through the first spray head 15 to remove the raised dust and clean the ground;

accumulated water exists on the cleaned ground, the air inlet cover 12 sends the air generated by the exhaust fan 11 to the air drying area 21, the electric heating plate 18 heats the air to form hot air, and the ground with the accumulated water is quickly dried;

the ground after removing the line is damaged due to polishing and needs to be repaired in time, the slurry pump sends the spray paint in the spray paint box 8 into the liquid feeding pipe, the liquid feeding pipe sends the spray paint into the spray paint area 20, the spray paint is sprayed out through the spray paint head 2001, and the dried ground is sprayed and repaired.

In conclusion, the marking on the ground is quickly polished and scraped through the cooperation of the shell 5, the line removing mechanism 6 and the motor II; through the cooperation of the cleaning mechanism 10 and the motor III, the residual scraps and dust on the ground are cleaned; the dust collection pipe 2, the air inlet cover 12, the suction fan and the dust collection box are matched to clean and collect the scraps and the dust, so that the environment is prevented from being polluted; through the cooperation of the water outlet pipe 13, the spraying mechanism and the water pump, the dust is removed, the ground is cleaned, and the cutter blade 601 is cooled; the ground with accumulated water is quickly dried by matching the exhaust fan 11, the air inlet cover 12, the air drying area 21 and the electric hot plate 18; the dried ground is subjected to paint spraying repair through the matching of the paint spraying box 8, the paint spraying area 20 and a mud pump; through the cooperation of elevating system 3 and connecting rod 4, adjust the height of casing 5, the initial position and the final position of marking are clear away in the control, avoid causing unnecessary damage to ground.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. A road marking grinding device comprises a vehicle body (1) and a shell (5), wherein a placing rack (19) is arranged on the side surface of the vehicle body (1), the shell (5) is arranged on the side surface of the placing rack (19) in a sliding manner, a line removing mechanism (6), a cleaning mechanism (10) and a spraying mechanism are sequentially arranged in the shell (5), a water tank (9) and a dust collecting box are sequentially fixed above the placing rack (19), a drying mechanism and a paint spraying mechanism are arranged below the placing rack (19), a water pump is fixed in the water tank (9), the water outlet end of the water pump is connected with a water outlet pipe (13), the water outlet pipe (13) extends into the shell (5), the end part of the water outlet pipe (13) is connected with the spraying mechanism, a suction fan is arranged above the dust collecting box, the air inlet end of the suction fan is connected with a dust suction pipe (2), the air outlet end of the suction, the tail end of the dust collection pipe (2) is connected with an air inlet cover (12).

2. The road marking grinding device according to claim 1, wherein a second motor is fixed on the side surface of the housing (5), the second motor is electrically connected with the vehicle body (1), the line removing mechanism (6) comprises a fixed shaft (602), one end of the fixed shaft (602) is rotatably arranged inside the housing (5), the other end of the fixed shaft (602) is fixed on an output shaft of the second motor, and the grinding knife roller (601) is fixed on the fixed shaft (602).

3. The road marking grinding device according to claim 2, wherein the cleaning mechanism (10) comprises two fixed rollers (1001), the two fixed rollers (1001) are fixed on the side surface of the housing (5), a fixed shaft (1003) is fixed on the fixed rollers (1001), a third motor is arranged at the lower end of the fixed shaft (1003), the third motor is electrically connected with the vehicle body (1), a rotary disc (1004) is fixed on an output shaft of the third motor, and a plurality of cleaning brushes (1002) are arranged below the rotary disc (1004).

4. The road marking grinding device as claimed in claim 3, wherein the spraying mechanism comprises a first spraying pipe (14) and a second spraying pipe (17), the first spraying pipe (14) and the second spraying pipe (17) are both connected with the end of the water outlet pipe (13), the first spraying pipe (14) is located behind the rotating disk (1004), the second spraying pipe (17) is located obliquely above the cutting edge (601), the first spraying pipe (14) is provided with a plurality of first spraying heads (15), and the second spraying pipe (17) is provided with a plurality of second spraying heads (16).

5. The road marking grinding device according to claim 1, wherein the drying mechanism comprises an air drying area (21), the air drying area (21) is fixed below the placing rack (19), an electric heating plate (18) is arranged inside the air drying area (21), the electric heating plate (18) is electrically connected with the vehicle body (1), an exhaust fan (11) is fixed above the water tank (9), the water tank (9) is electrically connected with the vehicle body (1), an air outlet pipe (7) is arranged at an air outlet end of the exhaust fan (11), and the tail end of the air outlet pipe (7) is connected with the air drying area (21).

6. The road marking removal device according to claim 5, wherein a paint spraying box (8) is fixed above the placing rack (19), the paint spraying mechanism comprises a paint spraying area (20), the paint spraying area (20) is fixed below the placing rack (19), the paint spraying area (20) is located behind an air drying area (21), a plurality of paint spraying heads (2001) are arranged below the paint spraying area (20), a paint spraying pump is arranged inside the paint spraying box (8) and electrically connected with the vehicle body (1), a liquid outlet end of the paint spraying pump is connected with a liquid conveying pipe, and the tail end of the liquid conveying pipe is connected with the paint spraying area (20).

7. The road marking device according to claim 1 or 2, wherein the housing (5) is hinged with a connecting rod (4), a lifting mechanism (3) is arranged above the dust collection box, the lifting mechanism (3) comprises a fixed box (301), the fixed box (301) is fixed on the dust collection box, a fixed protrusion (303) is arranged above the fixed box (301), a lifting rod (305) is hinged between the fixed protrusion (303) and the connecting rod (4), a mounting groove (304) is formed inside the fixed box (301), a motor push rod (302) is hinged inside the fixed box (301), the motor push rod (302) is electrically connected with the vehicle body (1), and an extending end of the motor push rod (302) is hinged with the lifting rod (305).