JPH07331613A - Road marking painting device - Google Patents

Abstract

PURPOSE:To make it possible to easily form a road division line on a road surface without making variations in a position of the end of the road markings, a form of the end of the road marking and thickness. CONSTITUTION:When it is detected by a lowering detection switch valve 140 that a hopper 50 is located at a lowering position thereof with an up and down cylinder 122, a controlling circuit makes a shutter opening and closing cylinder 96 open a slit-like opening. The hopper 50 is raised and lowered at a certain speed, the slit-like opening is opened and shut and, at the same time, when the hopper 50 is located at the lowering position, the slit-like opening of the hopper 50 is immediately opened automatically, so that there is no variation in up and down motion of the hopper 50 and opening and shutting motion of the slit-like opening, there is no variations in a position of the end of a road marking, form and thickness, and the road marking can be easily formed on a road surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint applicator for road marking lines of the type in which a road marking line having a predetermined width is applied on the road surface.

[0002]

2. Description of the Related Art A paint storage device provided on a vehicle body for storing paint for road marking lines, a hopper for receiving fluid paint for road marking lines from the paint storing device, and a hopper for raising the hopper to its rising position. A hopper support mechanism that supports vertically movable between a descending position in contact with the road surface, and a shutter mechanism that opens and closes the road marking line paint received by the hopper to flow out from the slit-shaped opening. There is known a paint application device for road marking lines of a type that includes a road marking line having a width dimension corresponding to the length of the slit-shaped opening on the road surface.

In the road marking line paint applicator described above, a lever connected to the hopper and the shutter mechanism is manually operated to lower the hopper until it comes into contact with the road surface, and then the shutter mechanism forms a slit shape. The opening of is opened and the paint for the road marking line in the hopper is made to flow out through the slit-shaped opening.
When the vehicle body is moved forward, a road marking line or the like having a width substantially the same as the length of the slit-shaped opening is applied on the road surface.

[0004]

By the way, the above-mentioned paint for road marking lines is a mixture of a resin which is softened by heating and solidified at room temperature with appropriate pigments and fillers, and is in a fluid state. Since the viscosity is high, the start and end positions of the road marking line formed on the road surface are set to predetermined positions due to variations in the vertical operation of the hopper and the opening / closing operation of the shutter mechanism. It is difficult to make the end shape a right angle and make the thickness of the start end and end of the road marking line equal to other parts, and it requires considerable skill to operate the hopper vertically and open / close the shutter mechanism. Was.

The present invention has been made in view of the above circumstances, and an object of the present invention is to obtain a road without variation in the position of the end of the road marking line, the shape and thickness of the end of the road marking line, and the like. An object of the present invention is to provide a paint applicator for a road marking line that can easily form a marking line on a road surface.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a paint storage device provided on a vehicle body for storing paint for road marking lines,
A hopper that receives the paint for the road marking line in a fluid state from the paint storage device, and a hopper support mechanism that supports the hopper so as to be vertically movable between its ascending position and a descending position in contact with the road surface, and the hopper. A shutter mechanism that opens and closes the slit-shaped opening so that the accepted road marking line paint flows out from the slit-shaped opening, and a road marking line having a width dimension corresponding to the length of the slit-shaped opening is provided. A road marking line paint coating device of a type for coating on a road surface, comprising: (a) a shutter driving device that opens and closes the slit-shaped opening by driving the shutter mechanism; and (b) drives the hopper. And (c) the hopper up-and-down driving device for moving the hopper to its lowered position. And (d) the detection means detects that the hopper has been positioned at the lowered position, the shutter drive device is provided with the slit-shaped opening. And control means for opening.

[0007]

With this configuration, when the detection means detects that the hopper is moved to the lowered position by the hopper vertical drive device, the control means opens the slit-shaped opening in the shutter drive device. Therefore, when the hopper is located at the lowered position, the slit-shaped opening of the hopper is opened immediately, and the road marking line paint in the hopper is allowed to flow onto the road surface through the slit-shaped opening.
At the same time, as the vehicle body is advanced, a road marking line having a width substantially the same as the length of the slit-shaped opening is applied on the road surface.

[0008]

According to the paint applicator for a road marking line of the present invention, the hopper is moved up and down by the hopper up-and-down drive unit, and the shutter mechanism is driven by the shutter drive unit to open and close the slit-shaped opening. Therefore, when the hopper is moved up and down at a constant speed and the slit-shaped opening is opened and closed, and when the hopper is positioned in the lowered position, the slit-shaped opening of the hopper is automatically opened immediately. There is no variation in the vertical movement and the opening / closing movement of the slit-shaped opening.
Therefore, the road marking line can be easily formed on the road surface without variations in the position, shape, and thickness of the end portion of the road marking line.

Here, preferably, the vehicle body is provided with a drive source and a forward clutch for transmitting power from the drive source to drive wheels of the vehicle body, and the control means is
The shutter driving device is configured to open the slit-shaped opening and simultaneously engage the forward clutch thereof. With this configuration, the vehicle body is automatically advanced at the same time as the hopper is lowered, so that the starting and ending positions of the road marking line and the shapes and thicknesses of the starting and ending points of the road marking line are caused by the forward movement operation of the vehicle body. There is an advantage that the variation of is eliminated.

Preferably, the hopper support mechanism is
The hopper is movably supported in the vertical direction by rotating about a first axis centering in a direction perpendicular to the forward direction of the vehicle body, while the slit-shaped opening is formed in a contact state with the road surface of the hopper. The hopper is placed in a second direction perpendicular to the first axis so that it is always parallel to the road surface.
The hopper vertical drive device is provided so as to be swingable around an axis, and the hopper vertical drive device is provided so as to project from the hopper so as to be positioned substantially parallel to the second axis and above the second axis. A connecting member having an engaging hole for receiving the upper and lower levers, and the engaging hole of the connecting member swings the upper and lower levers in conjunction with the rocking motion of the road surface in the left-right direction when the hopper descends. It has a wide portion that allows movement, and a narrow portion formed below the wide portion to position the up and down lever at the center in the left-right direction when the hopper is raised. In this way, since the hopper can swing in accordance with the left and right inclination of the road surface at the lowered position where the hopper comes into contact with the road surface, the slit-shaped opening of the hopper is always maintained parallel to the road surface. There is an advantage that the side line of the road marking line is a clean line without irregularities.
Further, when the hopper is lifted, it is positioned at the center in the left-right direction, so that even swinging in the left-right direction is allowed when the hopper is next lowered.

Further, preferably, the connecting member is capable of vertically moving a slide member having a concavely curved lower end edge for engaging with the vertical lever located on the wide portion side of the engaging hole. In preparation for this, the detection switch valve for detecting the descent of the hopper is operated by the movement of the slide member. With this configuration, the slide member is moved regardless of the swinging position of the hopper, so that the detection accuracy of the descent of the hopper is improved.

[0012] Further, preferably, it is formed in the engagement hole of the connecting member with a curvature similar to that of the concavely curved lower end edge of the slide member, and the slide member is connected by engaging with the vertical lever. Further provided is a downward surface that comes into contact with the up / down lever and presses it downward when the member moves upward with respect to the member. With this configuration, when the connecting member is lowered by the hopper up-and-down driving device, the up-down lever is pressed against the downward surface formed in the engaging hole of the connecting member, so that the hopper presses the road surface with a predetermined pressing force. Since the vehicle body is moved forward while being pressed by, it is possible to prevent the hopper from rising above the road surface as much as possible, regardless of the unevenness of the road surface, and the thickness of the road marking line paint applied on the road surface becomes uniform. There is. Further, since the downward surface is formed in a concave shape with the same curvature as the lower end edge of the slide member, even if the hopper swings to the left or right during the coating operation, the vertical movement of the vertical lever is allowed. At the same time, there is an advantage that the pressing force on the hopper is maintained constant.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

1 and 2 show a side surface and a plane surface of a paint application device 10 for a road marking line according to an embodiment of the present invention. In the figure, a paint application device 10 includes a vehicle body 18 supported by a pair of left and right front wheels 14 and one rear wheel 16 which are drive wheels to which power of an engine 12 is transmitted.
Is equipped with. The engine 12 is mounted on the vehicle body 18.
And a cylinder container box 22 for accommodating the LPG cylinder 20,
A glass bead storage box 24 for storing glass beads, and a powdery raw material for the road marking line are stored and the liquid paint for the road marking line is stored by heating the raw material by an LPG burner (not shown). A paint melter 32 that causes the fluid road marking line paint to flow down from an opening / closing door 28 opened by an opening / closing operation lever 26 through a guide gutter 30, a throttle lever 34, a brake operation lever 36, a clutch operation lever 38, and an operation. Box 4
A handle 42 to which 0 is attached is provided. The operation box 40 includes a hopper lowering operation valve 43, a vehicle forward operation valve 44, an interlocking manual switching valve 45 which are manually operated,
A slit manual opening operation valve 46 and an intermittent line selection switch 47 are provided.

As a result, when the forward clutch (not shown) is engaged by the clutch operating lever 38 while the engine 12 is operating, the output of the engine 12 is transmitted to the front wheels 14 and the vehicle body 18 is moved forward. The forward speed of the vehicle body 18 is adjusted by changing the rotation of the engine 12 according to the operation of the throttle lever 34. The rear wheel 16 is also rotatably provided around a vertical axis that does not intersect with the axis of rotation of the rear wheel 16,
By applying a lateral force to the handle 42, the traveling direction of the vehicle body 18 can be easily changed.

On the right side surface of the vehicle body 18 in the forward direction, a hopper 50 for receiving the paint for the fluid road marking line which is made to flow down from the opening / closing door 28 of the paint melting pot 32 through the guide trough 30, and the hopper 50 thereof. A hopper support mechanism 52 that supports vertically movable between an ascending position and a descending position in contact with the road surface, and the fluid road marking line paint received in the hopper 50 flows out from a slit-shaped opening of a predetermined length. A shutter mechanism 56 that opens and closes its opening to allow
And a sprayer 60 for spraying the glass beads, which flow down from the glass bead storage box 24 through the hose 58, in a width dimension that is a predetermined dimension larger than the length of the slit-shaped opening.
And the spreader moving lever 62 that supports the spreader 60 and
And a spreader support device 64 for positioning the spreader 60 in the width direction of the vehicle body 18 in accordance with the operation of.

It should be noted that the road marking line paint is applied along the guide line drawn in advance on the road surface 66 so that the vehicle body 1
A guide rod 68 is rotatably provided on the vehicle body 18 so as to match the guide line during the drawing work for advancing the vehicle 8. The guide rod 68 is connected to the raising lever 70 so that it can be raised up to the position shown by the solid line in FIG. 1 when the wire drawing operation is not in progress.

1 and 3 show the hopper 50 in the raised position. In FIG. 3, the hopper 50 has a container shape with an open upper end.
The pair of side plates 74, which are brought into contact with the road surface 66 during work by slightly projecting to the road surface 66 side than the hopper 5
It is fixed on both sides of 0. Further, in the bottom portion of the hopper 50, which is located between the pair of side plates 74, the first fixed-side shutter member 76 and the second fixed-side shutter that are overlapped with each other with the height positions of the lower end surfaces thereof shifted. Member 78
And a movable side shutter member 80 slidably in contact with the lower end surface of the second fixed side shutter member 78 and brought into contact with the lower end surface of the first fixed side shutter member 76. A slide plate 82 is provided so as to be movable toward and away from the fixed-side shutter member 78.

A pair of engagement pins 8 are provided on the slide plate 82.
4 is provided in the width direction, that is, in the left-right direction with respect to the forward direction of the vehicle body 18, while the U-shaped portion 86 that half-circulates the hopper 50 and the pair of engagement pins 84 that extend in a direction perpendicular to both ends thereof A rotating member 90 including a pair of engaging portions 88 each having a notch 87 that engages with the supporting pin 92 at a connecting portion between the U-shaped portion 86 and the engaging portion 88.
It is provided so as to be rotatable around.

A shutter opening / closing cylinder 96 is mounted on a bracket 94 which is erected from the rear wheel side portion of the hopper 50.
Is provided, and the output rod 98 of the shutter opening / closing cylinder 96 and the U-shaped portion 86 of the rotating member 90 are
It is connected via a link 99. As a result, FIG.
8 or the output rod 98 of the shutter opening / closing cylinder 96 is projected so that the slide plate 82
Is located at the separated position, a slit-shaped passage for allowing the fluid road marking line paint to pass between the first fixed-side shutter member 76 and the second fixed-side shutter member 78 and the movable-side shutter member 80. An opening is formed. However, as shown by the solid line in FIG.
When the output rod 98 is pulled in and the slide plate 82 is positioned at the approaching position, the slit-shaped opening is closed.

In the present embodiment, the slide plate 82 and the rotating member 90 correspond to the shutter mechanism 56 that opens and closes the slit-like opening, and the shutter opening / closing cylinder 96 drives the shutter mechanism 56 to form the slit-like shape. It functions as a shutter drive device that opens and closes the opening. In addition, the slit-shaped opening is formed by the pair of side plates 7.
4 is the interval dimension, that is, the width dimension of the road marking line paint applied to the road surface 66.

At the front part of the vehicle body 18, a horizontal support shaft 100 for supporting the hopper 50 is provided in the vehicle width direction. The hopper support mechanism 52 supports the hopper 50 movably in the vertical direction by rotating the support shaft 100, which is perpendicular to the forward direction of the vehicle body 18, as the first shaft center, and the hopper 50 is movable in the vertical direction. 50 road surfaces 66
The hopper 50 so that the slit-shaped opening is always parallel to the road surface 66 in the contact state with the support shaft 1.
The center axis of swinging 102 in the direction perpendicular to 00 is the second axis, and is swingably supported about it.

That is, the hopper support mechanism 52 includes a swing center shaft 102 projecting forward from the hopper 50 and a support lever 104 rotatably supported by the support shaft 100.
And a fitting cylinder 106 that is provided at the tip of the support lever 104 and rotatably fits the swing center shaft 102. The support lever 104 has a length for adjusting the relative positions of the base end member 108 and the tip end member 110 that are relatively movable in the longitudinal direction, and the base end member 108 and the tip end member 110. An adjusting screw device 112 and a fixing screw 114 that fixes the relative positions of the proximal end member 108 and the distal end member 110 are provided.
Its total length can be adjusted as needed.
Further, 116 and 118 are LPG burners that heat the hopper 50 to prevent the road marking line paint in the hopper 50 from solidifying.

From the hopper 50, an up-and-down lever 1 having a cylindrical roller 119 rotatably fitted on the tip thereof.
20 is projected to the rear. This up and down lever 120
Is substantially parallel to the swing center axis 102 and is located above the swing center axis 102. The vehicle body 18 is provided with a bracket 124 for fixing the upper and lower cylinders 122 for moving the hopper 50 up and down. The upper and lower cylinders 122 have a built-in means for preventing the output rod 126 from rotating around its axis. In this embodiment,
The vertical cylinder 122 corresponds to a hopper vertical drive device.

As shown in FIGS. 4 and 5, the upper and lower cylinders 1
The output rod 126 of 22 is fixed with a connecting member 128 which is connected to the output lever 126 with a predetermined play when the vertical lever 120 is fitted through. As shown in detail in FIGS. 6 and 7, a fan-shaped wide portion 132 having a downwardly curved arc-shaped downward surface 129 and a pair of inclined surfaces 130 approaching each other downward, and a wide portion 1.
An engaging hole 136 is formed in the connecting member 128 below the reference numeral 32, which is composed of a narrow portion 134 having a width slightly larger than the diameter of the vertical lever 120 and into which the tip of the vertical lever 120 is inserted. . The wide portion 132 of the engagement hole 136 is provided on the vertical lever 12 in accordance with the swing of the hopper 50 at the lowered position of the hopper 50 during the coating operation shown in FIG.
It is for allowing the swinging movement of 0, and the engaging hole 13
The pair of slanted surfaces 130 and the narrow portion 134 formed between the slanted surfaces 130 position the vertical lever 120 at the center in the width direction when the hopper 50 is lifted, and the left and right uniform swings at the time of the next lowering. This is for allowing movement, for example, swinging within 10 degrees to the left and right.

The connecting member 128 has a pair of side plates bent to have a U-shaped cross section, and a support bolt 138 for supporting the vertical lever 120 in the narrow portion 134 via a rotatable roller 137. It is suspended between the pair of side plates. Further, the connecting member 128 is provided with a descending detection switch valve 140 for detecting a descending state in which the hopper 50 contacts the road surface 66, and is pushed up by the up / down lever 120 in the wide portion 132 of the engaging hole 136. A slide member 142 for operating the lowering detection switch valve 140 is attached so as to be vertically movable. Further, the connecting member 128 includes a bracket 124.
A bracket 146 for operating the rise detection switch valve 144 fixed to is fixed.

The slide member 142 has the engaging hole 1
It has a lower edge 148 which is concavely curved with a curvature similar to that of the downward surface 129 in 36. The lower edge 148 is formed with a curvature similar to the arc movement of the up / down lever 120 due to the swing of the hopper 50 being lowered for the coating operation, and the swing position of the up / down lever 120, that is, the hopper 50. Since the lower end edge 148 of the slide member 142 can be brought into contact with the up-down lever 120 regardless of the swing position, the detection accuracy of the lowered position of the hopper 50 is improved.

FIG. 9 is a diagram for explaining the control circuit 149 for controlling the operation of the coating apparatus 10 constructed as described above by pneumatic pressure. In the figure, the air pressure-fed from the air pressure source 150 driven by the engine 12 is adjusted by the first regulator 152 and the second regulator 154, respectively. The shutter opening / closing cylinder 96 is controlled by a two-position switching valve 156.
The forward cylinder 158 actuates a forward clutch (not shown) that transmits the power of the engine 12 to the front wheels 14, and is controlled by the two-position switching valve 160. The upper and lower cylinders 122 are controlled by a 2-position switching valve 162. A third regulator 163 is provided between the two-position switching valve 162 and the lower pressure chamber of the upper and lower cylinders 122 to set the pressing force of the upper and lower levers 120 during the paint application work. This third regulator 1
63 is set to a pressure of, for example, about 0.5 Kg / cm ² so that the pressing force of the hopper 50 against the road surface 66 during the paint application operation becomes an appropriate value. The lock cylinder 164 is for releasing the lock of a lock mechanism (not shown) provided so as to be automatically suspended to prevent the hopper 50 from falling when the hopper 50 rises to its raised position. When the switching valve 162 is switched to the side for lowering the upper and lower cylinders 122, it is operated to the unlocking side only for the period during which the rise detection switch valve 144 is operated.

When the hopper lowering operation valve 43 is operated, the signal pressure output from the hopper lowering operation valve 43 is changed to 2 via the shuttle valve 166.
The hopper 50 is lowered by the vertical cylinder 122 by being supplied to the position switching valve 162. When the interlocking manual switching valve 45 is operated to the interlocking side, the descending detection switch valve 140 detects the descending of the hopper 50, and at the same time, the signal pressure output from the descending detection switch valve 140 outputs the shuttle valve 16
The slit-shaped opening of the hopper 50 is opened by being supplied to the two-position switching valve 156 via No. 8. When the interlocking manual switching valve 45 is operated to the manual side, the slit-shaped opening is opened in response to the operation of the slit manual opening operation valve 46. When the vehicle forward operation valve 44 is operated in synchronism with the lowering of the hopper 50 or the opening of the slits, the vehicle body 18 is advanced, so that the slit-shaped opening is formed on the road surface 66 as shown in FIG. Road markings are applied with a width dimension similar to the length. At this time, the roller 119 of the up / down lever 120 is engaged with the engagement hole 1
The arcuate downward surface 129 inside the hopper 36 causes the hopper 50 to be lightly pressed downward regardless of the swinging posture of the hopper 50.
The side plate 74 of 0 is constantly slid on the road surface 66 and the hopper 5
The slit-shaped opening of 0 can follow the unevenness of the road surface 66.

When the above-mentioned coating operation is completed, when the interlocking manual switching valve 45 is operated to the manual side, the slit manual opening operation valve 46 is returned to close the slit-shaped opening. Then, the hopper lowering operation valve 43 is returned to raise the hopper 50, and then the vehicle forward operation valve 44 is returned. When the interlocking manual switching valve 45 is operated to the automatic side, the slit-shaped opening is closed by raising the hopper 50 at the same time as the hopper lowering operation valve 43 is returned, and then the vehicle is moved forward. The operation valve 44 is returned.

When forming an intermittent marking line, the interlocking manual switching valve 45 is switched to the interlocking side, and
After the intermittent line selection switch 47 is operated to the intermittent line side, the vehicle forward operation valve 44 is operated. As a result, the solenoid valve 172 is intermittently operated instead of the hopper lowering operation valve 43 in accordance with the drive signal from the intermittent signal generator 170 connected to the front wheels 14, so that an intermittent line that is intermittent at regular intervals is formed on the road surface. 66 is automatically applied.

As described above, according to this embodiment, when the lowering detection switch valve 140 detects that the hopper 50 is positioned at the lowering position by the upper and lower cylinders 122, the control circuit 149 causes the shutter opening / closing. Cylinder 9
Since the slit-shaped opening is opened in 6, the road marking line paint in the hopper 50 is immediately discharged to the road surface 66 through the slit-shaped opening as soon as the hopper 50 is positioned at the lowered position, and the road marking line is broken. Coated on 66. Therefore, the hopper 50 is moved up and down at a constant speed, the slit-shaped opening is opened and closed, and when the hopper 50 is positioned at the lowered position, the slit-shaped opening of the hopper 50 is automatically opened immediately. Hopper 5
There is no variation in the vertical movement of 0 and the opening / closing operation of the slit-shaped opening. Therefore, the road marking line can be easily formed on the road surface without variations in the position, shape, and thickness of the end portion of the road marking line.

Further, according to this embodiment, the hopper support mechanism 52 supports the hopper 50 so as to be movable in the vertical direction by rotating around the support shaft 100 in a direction perpendicular to the forward direction of the vehicle body 18. On the other hand, when the hopper 50 is in contact with the road surface 66, the hopper 50 is swingably supported around the swing center shaft 102 so that the slit-shaped opening is always parallel to the road surface. 122 is provided with a connecting member 128 having an engaging hole 136 that receives the vertical lever 120 projecting from the hopper 50 so as to be positioned substantially parallel to and above the swing center axis 102. The engagement hole 136 of 128 is provided on the road surface 66 when the hopper 50 is in the lowered position.
And a wide portion 132 that allows the up-and-down lever 120 to swing in conjunction with the swinging motion associated with the horizontal inclination of the hopper 5 and its hopper 5
It has a narrow portion 134 formed below the wide portion 132 so as to position the up-down lever 120 at the center in the left-right direction when it is raised by zero. Therefore, since the hopper 50 can swing in accordance with the left and right inclination of the road surface 66 at the lowered position where the hopper 50 contacts the road surface 66, the slit-shaped opening of the hopper 50 is always maintained parallel to the road surface 66. Therefore, there is an advantage that the side line of the road marking line is a clean line without irregularities. Further, when the hopper 50 is raised, the hopper 50 is positioned at the center in the left-right direction, so that the left-right uniform swing is allowed in the next lowering.

Further, according to this embodiment, the connecting member 128 is used.
Is a bottom edge 148 curved in a concave shape for engaging with the vertical lever 120 located on the wide portion 132 side of the engagement hole 136.
Since the slide member 142 having the above is provided so as to be movable in the vertical direction and the detection switch valve 140 that detects the lowering of the hopper 50 is activated by the movement of the slide member 142, the swing position of the hopper 50 is not concerned. Instead, the slide member 142 is moved, and the accuracy of detecting the descent of the hopper 50 is increased.

Further, according to this embodiment, the connecting member 128 is used.
Is formed in the engaging hole 136 of the slide member 142 with a curvature similar to that of the lower end edge 148 of the slide member 142, and when the slide member 142 engages with the up / down lever 120, the slide member 142 is raised above the connecting member 128. A downward surface 129 that abuts against the vertical lever 120 and presses it downward when it moves in the direction is further provided. Therefore, when the connecting member 128 is lowered by the up / down cylinder 122, the up / down lever 120 moves the connecting member 12 downward.
8 is pushed by the downward surface 129 formed in the engaging hole 136, the hopper 50 is pushed by the road surface 66 with a predetermined pressing force, and the vehicle body 18 is moved forward. The floating of the hopper 50 from the road surface 66 is prevented as much as possible, and there is an advantage that the thickness of the road marking line paint applied on the road surface 66 becomes uniform. Further, since the downward surface 129 is formed in a concave shape with the same curvature as the lower end edge of the slide member 142, even if the hopper 50 swings to the left or right during the coating operation, the left and right levers 120 of the up and down lever 120 move. There is an advantage that the movement is allowed and the pressing force on the hopper 50 is maintained constant.

FIG. 10 shows a main part of the control circuit 174 in another embodiment of the present invention. In the figure, a shuttle valve 178 is provided between the lowering detection switch valve 140 and the vehicle forward operation valve 44 and the two-position switching valve 160 that controls the forward movement cylinder 158, and an output signal pressure of the lowering detection switch valve 140 is generated. The forward clutch of the vehicle is automatically engaged in connection with the operation. The control circuit 174 of this embodiment is the same as the control circuit 1 described above.
The only difference is that the above-mentioned shuttle valve 178 is added to 49.

The vehicle body 18 has an engine 12 as a drive source.
And a forward clutch for transmitting the power from the engine 12 to the drive wheels of the vehicle body.
49 is configured to open the slit opening in the shutter opening / closing cylinder 96 and at the same time to engage the forward clutch thereof. Therefore, according to the present embodiment, the interlocking manual switching valve 45 is switched to the interlocking side. If the hopper lowering operation valve 43 is operated to bring the hopper 50 into contact with the road surface 66, the hopper 50 is interlocked with the road surface 66.
At the same time that the slit-shaped opening is opened, the vehicle body 18 is automatically advanced. In addition, the hopper lowering operation valve 43
When the hopper 50 is separated from the road surface 66 by the return operation, the slit-shaped opening of the hopper 50 is closed and the forward movement of the vehicle body 18 is automatically stopped. Therefore, according to this embodiment, there is an advantage that variations in the positions of the starting and ending points of the road marking line and the shapes and thicknesses of the starting and ending points of the road marking line due to the forward operation of the vehicle body 18 are eliminated.

Although one embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be implemented in other modes.

For example, although the control circuits 149 and 174 functioning as control means in the above-described embodiment are constituted by the pneumatic circuit used as a pneumatic pressure signal and a drive source for the actuator, they may be hydraulic or electric circuits. It doesn't matter.

Further, in the above-described embodiment, the shutter opening / closing cylinder 96 which functions as a shutter driving device and the vertical cylinder 122 which functions as a hopper vertical driving device.
Was a pneumatic cylinder, it may be a hydraulic cylinder or an electric motor.

Further, in the above-mentioned embodiment, the lowering detection switch valve 140 functioning as the detecting means is a valve which outputs a pneumatic signal, but it may be configured to output a hydraulic signal or an electric signal. .

Although not illustrated one by one, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.

[Brief description of drawings]

FIG. 1 is a side view showing a paint application device for a road marking line according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged view showing a hopper and a supporting mechanism therefor, which are essential parts of the embodiment of FIG. 1, and shows a state in which the hopper is in a raised position.

FIG. 4 is an enlarged view showing a configuration near the upper and lower cylinders of the embodiment of FIG.

FIG. 5 is a front view of FIG.

FIG. 6 is an enlarged view showing a main part of FIG.

FIG. 7 is an enlarged view showing a main part of FIG.

8 is a view corresponding to FIG. 3 showing a state in which the hopper of the embodiment of FIG. 1 is lowered until it comes into contact with the road surface.

9 is a pneumatic circuit diagram showing a configuration of a control circuit provided in the road marking line paint coating apparatus of FIG. 1. FIG.

FIG. 10 is a diagram illustrating a main part of a control circuit according to another embodiment of the present invention.

[Explanation of symbols]

 10: Road marking line paint application device 12: Engine (driving source) 18: Vehicle body 50: Hopper 52: Hopper support mechanism 56: Shutter mechanism 96: Shutter opening / closing cylinder (shutter drive device) 120: Vertical lever 122: Vertical cylinder ( Hopper vertical drive device) 128: Connection member 136: Engagement hole 140: Fall detection switch valve (detection means) 142: Slide member 148: Lower edge 149, 174: Control circuit (control means)

Claims (5)

[Claims] 1. A paint storage device provided on a vehicle body for storing paint for road marking lines, a hopper for receiving the paint for road marking lines in a fluid state from the paint storing device, and the hopper as its raised position. A hopper support mechanism that supports vertically movable between a descending position in contact with the road surface,
And a shutter mechanism that opens and closes the road marking line paint received in the hopper to flow out from the slit-shaped opening, and a road marking line having a width dimension corresponding to the length of the slit-shaped opening. A paint applicator for road marking lines of the type that is applied on the road surface, wherein a shutter drive device that opens and closes the slit-shaped opening by driving the shutter mechanism, and a top and bottom of the hopper by driving the hopper. A hopper up-and-down drive device for changing the position, a detection means for detecting that the hopper is in the lowered position by the hopper up-and-down drive device, and the hopper is placed in the lowered position by the detection means. If it is detected, the shutter driving device, and a control means for opening the slit-shaped opening,
A paint applicator for road marking lines, characterized in that it includes: 2. The vehicle body is provided with a drive source and a forward clutch for transmitting motive power from the drive source to drive wheels of the vehicle body, and the control means causes the shutter drive device to have the slit. The paint applicator for a road marking line according to claim 1, wherein the forward opening clutch is engaged at the same time when the opening is opened. 3. The hopper support mechanism supports the hopper movably in the vertical direction by rotating about a first axis centering in a direction perpendicular to the forward direction of the vehicle body, while supporting the hopper in the vertical direction. The hopper is swingably supported around a second axis perpendicular to the first axis so that the slit-shaped opening is always parallel to the road when in contact with the road. The vertical drive device includes a connecting member having an engagement hole that receives the vertical lever projecting from the hopper so as to be positioned substantially parallel to the second axis and above the second axis. The engagement hole of the connecting member includes a wide portion that allows the up-and-down lever to swing in conjunction with the swinging motion of the road surface in the left-right direction at the lowered position of the hopper, and a wide portion when the hopper is raised. Move the upper and lower levers Claim 1 or 2 road lane line paint application device is one having a narrow portion formed on the lower side of the wide width portion to be positioned in the lateral direction of the center. 4. The connecting member is provided with a slide member having a lower end edge curved in a concave shape for engaging with the vertical lever located on the wide portion side of the engagement hole, the slide member being movable in the vertical direction. The paint application device for road marking lines according to claim 3, wherein a detection switch valve that detects the descent of the hopper is operated by the movement of the slide member. 5. An engaging hole of the connecting member is formed with a curvature similar to that of a concavely curved lower end edge of the slide member, and the sliding member engages with the up / down lever to allow the connecting member to move toward the connecting member. 5. The road marking line paint application device according to claim 4, further comprising a downward surface that abuts against the vertical lever and presses the downward lever when the upper lever is moved upward.