JP2011000407A - Line marker and line drawing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a line marker and a line drawing method, drawing a clear line without scattering of a paint injected from a nozzle to the outside of the line, and without dripping and bleeding of a liquid and a difference in tone, including a truck having excellent direct advance stability at a linear part, and capable of traveling with an accurate radius at a curve part.SOLUTION: The truck is loaded with a tank for storing the paint, a gun for spraying the paint, a feeder for supplying the paint from the tank to the gun, a pair of regulating discs provided on both sides of the gun and contacting with the painting surface to rotate, a gutter member provided ahead in the advancing direction between the pair of regulating discs to remove the paint adhering to the side surfaces of the regulating discs and cause the same to flow forward, and a tray for storing the paint to flow down through the gutter member.

Description

  The present invention relates to a line marker and a line drawing method for drawing a line by spraying paint on a ground or a court of a stadium.

  2. Description of the Related Art Conventionally, a jet type line marker has been proposed in which a line is drawn by spraying paint from a nozzle toward the surface of a stadium ground or a court. For example, a ground injection type line marker described in Patent Document 1 includes a tank that stores paint on a frame that can be moved by wheels, and a paint suction pump that sucks the paint and ejects it from a nozzle. The structure is such that a line is drawn by spraying a paint from the nozzle toward the ground surface while moving the frame by manually pushing a hand bar attached to the frame.

  Moreover, the line marker described in Patent Document 2 is an electric pump that sucks paint from a paint tank and the paint tank and sprays the paint in a spray form from an injection nozzle of an injection device on a carriage driven by a motor. The spray device has a spray nozzle for spraying the paint in a spray form, and a pair of guide square plates suspended parallel to each other on the side of the spray nozzle, and the carriage is mounted on the coater by a motor. It is structured to draw a line by spraying paint while running.

  Further, in Patent Document 3, at least a pair of injection nozzles are provided in a vertical plane perpendicular to the traveling direction of the carriage, with the tip side facing downward, and the extension line of the central axis of these injection nozzles is the tip of each injection nozzle. It is characterized by being inclined so as to cross each other at the bottom.

JP-A-8-792 JP-A-8-71201 JP 2008-154714 A

  In the previously proposed paint spray type line markers as described above, in order to prevent the paint sprayed from the nozzles from scattering, a pair of splash prevention plates is provided on both sides of the spray nozzle. Is provided. However, since this method requires a gap between the ground or the surface of the coat and the splattering prevention plate, the sprayed paint protrudes from the gap, blurring the boundary of the line, and drawing a clear line. There was a problem that I could not.

  In addition, the sprayed paint gradually accumulates on the sides of the splatter prevention plate, eventually dripping down and flowing downwards and dripping onto the surface of the ground or coat, creating a protrusion or shade difference from the line. There was also a problem.

  On the other hand, it is common to use a masking tape or formwork to prevent splashing, but in that case, not only do you need materials such as masking tape and formwork, but also when drawing long-distance lines. It requires a lot of labor and time, and the work efficiency is extremely poor. In particular, in track and field stadiums, the surface of the track is roughened to prevent slipping, so masking tape cannot be used. Since the radius is different for each lane, there is a problem that a large number of various types of molds corresponding to the radius of each lane are required.

  In addition, in order to draw a line, it is necessary to draw accurately along a pre-drawn marking line. For example, in track and field stadiums, it is necessary to maintain accuracy in millimeters, but in the straight part, even a slight meander or deviation of about 3 to 5 mm can be discriminated if viewed in an oblique direction. However, an apparatus capable of drawing a line with such a high accuracy has not been put into practical use.

  Therefore, in the present invention, the above-mentioned problems can be solved, and the paint sprayed from the nozzle can be drawn out of the line without dripping, dripping or oozing out, density difference, etc. An object of the carriage is to provide a line marker and a line drawing method that are excellent in straight running stability at a straight line portion and that can run at an accurate radius at a curved portion.

  The line marker according to the present invention includes a tank for storing paint, a gun for spraying paint, a supply device for supplying paint to the gun from the tank, and a grounding device that is provided on both sides of the gun and rotates on the paint surface. A pair of regulating discs, and a gutter member provided on the front side in the advancing direction between the pair of regulating discs, for removing the paint adhering to the side surface of the regulating disc and causing it to flow forward The tray for storing the paint that has flowed down the saddle member is mounted on the carriage.

  In the line marker according to the present invention, the carriage includes at least a pair of steering wheels, a pair of fixed wheels, and a steering device, and each of the pair of steering wheels and the pair of fixed wheels is mounted on an axle. In addition, each pair of wheels can be switched between free rotation and rigid connection by operation of each clutch provided on the axle.

  In the line drawing method according to the present invention, when a straight line is drawn using the line marker described above, the steering wheel is aligned with the position in the linear direction and the operation of the clutch is performed to connect the pair of steering wheels to each other. When running with a pair of fixed wheels rigidly connected and drawing a curved line, adjust the steering handle to the position of the angle corresponding to the radius of the curve and operate the clutch to make a pair of steering wheels. It is performed while traveling in a state where the wheels and a pair of fixed wheels are rotatably switched.

  According to the first aspect of the present invention, in order to prevent the paint sprayed from the gun from splashing out of the line, the regulation plates provided on both sides of the gun are brought into contact with the painted surface and rotate. Since it is a disc, there is no gap between the ground and the coated surface such as a coat, and the paint can be prevented from splashing out of the line. Further, the paint adhered to the inner side surface of the regulation disk is caused by the collar member provided on the front side in the traveling direction between the regulation disks, so that the coating material adhered to the side surface of the regulation disk every rotation is the aforementioned collar member. Since the paint removed by the blade portion of the material flows down to the storage tray provided in front of the saddle member, the paint adhering to the side surface of the regulation disk gradually accumulates. It is possible to prevent the liquid from dripping down, dripping, sticking out of the line, or causing a difference in light and shade.

  Further, if the line marker according to the present invention of claim 2 is used, when a straight line is drawn, the steering handle is adjusted to the position in the linear direction, and at the same time, both the pair of steering wheels and the pair of fixed wheels are By rigidly connecting the wheels by operating the clutches, wobbling and meandering are less likely to occur during traveling, and the line can be drawn while traveling in a straight line with extremely high accuracy. Also, when drawing a curved line, if the steering wheel is adjusted to an angle corresponding to the radius of the curved line, and each of the wheels is freely switched by operating each of the clutches, the inner peripheral side and the outer peripheral side The difference in rotation of the wheels can be eliminated, and it becomes possible to draw a line while running a curve with a smooth and accurate radius.

  As described above, according to the line marker and the line drawing method of the present invention, the paint sprayed from the nozzle draws a clear line without splashing out of the line, dripping or oozing, density difference, etc. In addition, the carriage can provide a line marker and a line drawing method that are excellent in straight running stability at the straight part and can run at an accurate radius at the curved part, and the efficiency of the line drawing work is greatly improved.

It is a side view of one embodiment of a line marker concerning the present invention. It is a top view same as the above. It is a front view of the line drawing unit concerning Embodiment 1 of the present invention. It is a side view same as the above. It is a top view same as the above. It is sectional drawing of the eaves member concerning Embodiment 1 of this invention. It is a side view of the trolley | bogie concerning Embodiment 2 of this invention. It is a top view same as the above. It is sectional drawing of the wheel unit concerning Embodiment 2 of this invention. It is a top view same as the above.

  FIG. 1 is a side view showing an embodiment of a line marker according to the present invention, and FIG. 2 is a plan view thereof. As shown in these figures, the line marker 1 is on a track or a court of a stadium. A line drawing unit equipped with a tank 102 for storing paint on the floor plate 3 of the movable carriage 2 and a spray gun for spraying the paint in the tank toward the surface of the truck or coat. 50, an air supply device 103 for supplying the paint in the tank 102 to the spray gun, and a power supply device 101 such as a generator.

  3 is a front view of the line drawing unit 50 according to the first embodiment of the present invention, FIG. 4 is a side view of the line drawing unit 50, and FIG. 5 is a plan view of the line drawing unit 50. FIG. 4 is a view showing a state in which the regulation disc 51 is removed. In FIG. 4, 52 is a gun for spraying paint, but this figure shows an example of a low-pressure air spray gun. 53 is a hose for supplying low-pressure air, 54 is a hose for supplying paint from the bottom of the storage tank 102, and 55 is a hose connected to make the air pressure in the gun the same as the pressure in the sealed storage tank 102 It is. A trigger 56 is provided on the gun 52. The trigger can be easily operated by using a means such as a wire or a lever (not shown) so that it can be remotely operated at the top.

  In FIG. 4, the gun 52 is rotatably supported by a hinge 59 provided at the lower end of the vertical support bar 60 between a pair of regulating disks 51 and 51 ′. Is held by a clamp 61 provided at the left end of the horizontal support rod 62 in the vertical direction so as to be slidable in the vertical direction. For example, it can be fixed at an arbitrary position by tightening a butterfly bolt 61 ′. Similarly, the horizontal support rod 62 is held by a clamp 63 attached to the movable frame 64 so as to be slidable in the horizontal direction, and can be fixed at an arbitrary position by tightening a butterfly bolt 63 '. In this way, the gun 52 can be easily adjusted to an arbitrary position and an arbitrary angle.

  In FIG. 3, reference numeral 68 denotes a bearing, which rotatably supports a shaft 67. Shaft holders 65 and 66 having regulation disks 51 and 51 'are fitted to the shaft 67, and can be fixed at arbitrary positions by tightening butterfly bolts 65' and 66 ', for example. That is, it is possible to freely adjust the width between the regulation disks 51 and 51 ′, which becomes the line width. The bearing 68 is fixed to the movable frame 64, and the movable frame 64 is attached to a fixed frame 69 via a slide guide 70 so as to be slidable in the vertical direction. Reference numeral 71 denotes a support rod, which is fixed to the movable frame 64 at the lower end, and is fitted in a holder 69a attached to the fixed frame 69 in the upper part. Reference numeral 72 denotes a handle attached to the upper end of the support bar 71. When the handle 72 is pulled up, the movable frame 64 is pulled up. When only moving the carriage 2 without drawing a line, for example, if a hole 71 ′ provided in the support bar 71 and a hole provided in the holder 69a are aligned, and a pin (not shown) is inserted, The movable frame 64 can be held in the raised state. The fixed frame 69 is attached to the carriage 2 at the horizontal portion 69 ′.

  In FIG. 4, 73 is a hook member, 74 is a tray that receives and stores the paint flowing down the hook member 73, and 75 is a bracket that is attached to the movable frame 64 and holds the tray 74 and the hook member 73. .

  FIG. 6 is a cross-sectional view of the flange member 73 in FIG. 4 as viewed from the right side, and the edge portion 73a of the flange member 73 is in contact with the inner side surfaces of the regulation disks 51 and 51 ′. 73b part is a collar part which makes the removed coating material flow down. The eaves member 73 only needs to be able to remove the paint by contacting the inner side surfaces of the regulation disks 51 and 51 ′ with an appropriate repulsive force. For example, the eaves member 73 is preferably made of a steel plate or stainless steel plate having a thickness of about 0.5 mm. .

  Next, the operation of the above-described line drawing unit 50 according to the present invention will be described. First, the storage tank 102 is filled with a required amount of paint and sealed. Next, when the power supply device 101 and the air supply unit 103 are activated and the trigger 56 provided in the spray gun 52 is pulled, the paint in the storage tank 102 is supplied into the gun 52 through the hose 54. At the same time, the low pressure air is also supplied into the gun 52 through the hose 53, and the coating material and the low pressure air are simultaneously ejected from the tip nozzle 57, and the coating material is sprayed on the lower surface in the form of mist or particles as shown at 58. Prior to the spraying operation, the movable frame 64 is slidable in the vertical direction in advance, and the regulating disks 51 and 51 'are grounded to the painted surface.

  At this time, since the spraying is performed between the regulation disks 51 and 51 ′ that are in contact with the paint surface such as a truck or a coat, the sprayed paint is regulated by the regulation disks 51 and 51 ′ and scattered laterally. Because there is no, a clear line can be drawn. The disk is sufficiently large so that the paint does not scatter laterally from the gap before and after the grounding point, for example, the outer diameter is about 300 to 400 mm, and the spray angle of the gun 52 proceeds as shown in FIG. It is preferable to incline slightly backward with respect to the direction (right direction in FIG. 4) and to spray directly below the central axis of the regulating disk, that is, toward the ground contact point. The spraying conditions should be adjusted such as the viscosity of the paint, the nozzle diameter, the amount of sprayed air, the distance between the nozzle and the paint surface, etc., so that the paint will not disperse far away and will not have a rough finish. . In the present embodiment, an example of a low-pressure air spray type gun in which paint is relatively difficult to scatter is shown, but a general high-pressure air spray gun or an airless spray gun can also be used.

  When the carriage 2 is moved simultaneously with the start of the above-described spraying, the line having a width between the regulation disks 51 and 51 'can be drawn continuously and continuously without the paint splashing and protruding from the line. However, if the line is continuously drawn, the sprayed paint adheres and accumulates gradually on the inner side surfaces of the control disks 51 and 51 ′ for scattering control, and eventually drops and flows downward. Dropping on the surface of the ground or coat may cause protrusions or differences in shades from the line. In addition, the paint may harden on the inner side surfaces of the regulation disks 51 and 51 ', and the width of the line may gradually become narrower.

  The eaves member 73 removes the paint adhering to the side surfaces of the regulation disks 51 and 51 '. As the carriage 2 moves, the regulation disks 51 and 51 ′ that are in contact with the painted surface rotate, so that the edge portion 73 a of the collar member that is in contact with the inner side surface of the regulation disks 51 and 51 ′ Then, the adhered paint is continuously removed, and the removed paint flows down the flange 73b and is stored in the storage tray 74. Accordingly, when the line marker of the present invention is used, it is possible to draw a clear line free from the spray of paint sprayed from the nozzle, dripping or oozing, difference in density, and the like. In addition, when the pressing force of the edge portion 73a of the eaves member that is in contact with the side surfaces of the regulation disks 51 and 51 ′ is large, or when the resistance of the paint to be removed increases due to the high viscosity of the paint, The discs 51 and 51 ′ may slip at the ground contact portion and stop rotating. In this case, a weight (not shown) is mounted on the movable frame 64 or between the fixed frame 69 and the movable frame 64. This can be solved by increasing the ground load by a method such as interposing a compression spring (not shown) on the surface.

  Next, the cart 2 according to the second embodiment of the present invention will be described. FIG. 7 is a side view of the carriage 2, and FIG. 8 is a plan view of the carriage 2. In FIG. 7, reference numeral 3 denotes a frame of a carriage, on which a floor board 3 'is stuck. FIG. 8 shows a state in which the floor board 3 'is removed. In these drawings, reference numeral 4 denotes a hand bar when the cart is pushed manually. Reference numeral 6 denotes a handle for steering the carriage. When this is rotated, the rotation is transmitted from the vertical shaft 7 connected to the handle 6 to the bevel gear box 8 and further to the horizontal shaft 9. Reference numeral 10 denotes a bearing for holding the shaft, and reference numeral 11 denotes a male screw portion provided on the distal end side of the shaft 10. Reference numeral 12 denotes a block having a female screw portion fitted to the male screw portion 11, and a fulcrum portion 13a of the link 13 is rotatably fitted on the upper surface thereof. The other fulcrum part 13b of the link 13 is rotatably connected to a wheel unit 20 described later via a pin.

  FIG. 9 is a sectional view of the wheel unit 20, and FIG. 10 is a plan view of the wheel unit 20. In FIG. 9, reference numeral 21 denotes a wheel, which is coupled using a key 21 a so as not to rotate with respect to the axle 23. The other wheel 22 is mounted via a bearing 22 a so as to be rotatable with respect to the axle 23, and at the same time is connected to a clutch 24 mounted on the axle 23. As the clutch 24, those widely used as general industrial parts can be used, for example, a VCE type dry single-plate electromagnetic clutch manufactured by Ogura Clutch Co., Ltd. When the clutch 24 is in a non-energized state, the wheel 22 is rotatably attached to the axle 23 via a bearing 22a and can freely rotate. When the clutch 24 is energized, that is, in the ON state, the wheel 22 is coupled to the axle 23 by the action of the electromagnetic force of the clutch and cannot rotate, that is, the wheel 22 and the axle 23 are substantially integrated. The material used for the contact surfaces of the wheels 22 and 23 is preferably urethane, which is difficult to slip and has excellent wear resistance.

  The axle 23 can be freely rotated by being held by bearing units 25 and 25 ′ attached to the frame 26. The frame 26 constituting the wheel unit 20 is attached to the lower surface of the frame 3 of the carriage 2. In the plan view of the carriage 2 shown in FIG. 8, on the left side, the frame 26 is fixed with bolts 16 to form a fixed wheel, while on the right side, the frame 26 is attached so as to be able to swing around the fulcrum 14. To form a steering wheel. Reference numeral 15 denotes a swing guide hole.

  FIG. 10 is a plan view of the wheel unit 20 described above, and shows an example of the steering wheel side. The frame 26 attached so as to be able to swing around the fulcrum 14 is connected to the link on the left side of the figure. 13 fulcrum parts 13b and are rotatably connected through pins. Therefore, when the handle 6 is rotated, the rotation is transmitted to the horizontal shaft 9, and the block 12 having the female screw fitted to the male screw portion 11 at the tip thereof moves forward or backward according to the rotation of the male screw 11. For this reason, the wheel unit 20 swings around the fulcrum 14 as indicated by a virtual line in FIG.

  Next, the operation of the above-described carriage 2 according to the present invention will be described. When the line is drawn in a straight line, the position of the handle 6 is adjusted so that the steering wheel and the fixed wheel are parallel, and at the same time, the clutch 24 is turned on, that is, energized, and both the steering wheel and the fixed wheel are The wheels 21 and 22 and the axle 23 are connected. In that way, like the wheels of a railway vehicle, the wheels are rigidly connected to the axle, and both of the pair of wheels rotate completely the same, so there is no wobbling or meandering and extremely stable. Can go straight ahead.

  On the other hand, in a curved part such as a track of an athletic stadium, it is necessary to draw a line having an accurate radius without meandering. When the above-described carriage 2 according to the present invention is used, in the curved portion, the steering wheel 6 is adjusted so that the steering wheel is at an angle corresponding to the radius of the curved line, and at the same time, the clutch 24 is turned off, that is, de-energized. Thus, both the steering wheel and the fixed wheel are brought into a state where the wheels 21 and 22 are freely rotatable with respect to each other. By doing so, it is possible to eliminate the speed difference, i.e., the rotation difference between the inner and outer wheels on the curved portion, and to draw a smoothly curved line.

  For example, assuming that the radius of the track curve of the track and field is 35 m and the wheel base of the wheel of the carriage 2 of the present invention, that is, the pitch between the wheels is 0.9 m, the angle between the axles of the steering wheel and the fixed wheel is It needs to be about 1.5 °. In this case, in this embodiment, the handle 12 may be rotated to move the block 12 forward or backward by about 10 mm. For example, assuming that the pitch of the male screw 11 is 2 mm, the handle 6 may be rotated five times, and delicate adjustment can be easily and accurately performed. In addition, what is necessary is just to make the pitch of the said male screw 11 into a product of suitable pitch according to the radius of the curve which draws a line. In addition, a tachometer, an indicator of the number of revolutions, a scale in which the number of revolutions is converted into the radius of the curve, or the like may be appropriately installed so that the number of revolutions and the rotational position of the handle 6 can be easily determined.

  In the line drawing method according to the present invention using the line marker of the present invention, for example, at the moment of transition from the straight portion to the curved portion, the clutch 24 is immediately turned off and the handle 6 is moved to a position corresponding to a predetermined radius. The line marker can be drawn continuously without almost stopping the line marker. On the other hand, when shifting from the curved portion to the straight portion, the switch of the clutch 24 may be turned on and the handle 6 may be returned to the position corresponding to the straight line. It should be noted that the switch of the clutch 24 and the display device for the rotational position of the handle 6 are easy to use if they are collected on the operation panel 5 installed near the hand push bar 4. In this way, for example, even when a track line of an athletic stadium is continuously drawn once, it is possible to draw straight lines and curves continuously and accurately.

    As described above, according to the line marker and the line drawing method of the present invention, the paint sprayed from the nozzle draws a clear line without splashing out of the line, dripping or oozing, density difference, etc. In addition, the carriage has excellent straight-line stability at the straight part and can travel with an accurate radius at the curved part, which greatly improves the work efficiency.

DESCRIPTION OF SYMBOLS 1 Line marker 2 Bogie 3 Bogie frame 3 'Floor board 4 Hand bar 5 Operation panel 6 Steering handle 7 Vertical shaft 8 Bevel gear box 9 Horizontal shaft 10 Bearing 11 Male thread portion 12 Block 13 Link 14 Support point 15 Guide hole 16 Bolt 20 Wheel unit 21 Wheel 22 Wheel 23 Axle 24 Clutch 25 Bearing unit 26 Frame 50 Line drawing unit 51 Restriction disk 52 Gun 53 Low pressure air hose 54 Paint supply hose 55 Tank connection hose 56 Trigger 57 Tip nozzle 58 Granular paint 59 Hinge 60 Vertical support rod 61 Clamp 62 Horizontal support rod 63 Clamp 64 Movable frame 65 Shaft holder 66 Shaft holder 67 Shaft 68 Bearing 69 Fixed frame 70 Slide guide 71 Support rod 72 Handle 73 Hook member 74 Paint storage tray 75 Holding bracket 101 Power supply device 102 Paint storage tank 103 Air supply machine

Claims (3)

  A tank for storing paint, a gun for spraying paint, a supply device for supplying paint to the gun from the tank, a pair of regulating disks provided on both sides of the gun and rotating while contacting the paint surface, A scissor member provided on the front side in the advancing direction between the pair of regulating discs for removing the paint adhering to the side surface of the regulating disc and flowing down, and the scissor member flowed down A line marker characterized in that a tray for storing paint is mounted on a carriage.   The carriage includes at least a pair of steering wheels, a pair of fixed wheels, and a steering device, and each of the pair of steering wheels and the pair of fixed wheels is mounted on an axle, and each provided on the axle. The line marker according to claim 1, wherein each of the pair of wheels can be switched between free rotation and rigid connection by operating the clutch.   When a straight line is drawn using the line marker according to claim 2, the steering wheel is aligned with the position in the linear direction, and the pair of steering wheels and the pair of fixed wheels are rigidly operated by operating the clutch. When drawing a curved line while running in a tied state, the steering wheel is adjusted to an angle corresponding to the radius of the curved line, and a pair of steering wheels and a pair of fixed wheels are operated by operating the clutch. A line drawing method, wherein the line drawing method is performed while traveling in a state where they are freely switched.

Images