JPS5842483Y2 - Coating device for road marking lines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a road marking applicator particularly suitable for marking broken lines.

Conventionally, in a road marking applicator that sprays road marking material using a rotating body, when the supply of road marking material from a tank to the rotating body is interrupted or stopped, the material adhering to the rotating body is sprayed and applied to the edge of the road marking. In order to prevent blurring of the road marking material and to clearly demarcate the edges, there is a space below the rotating body that blocks the injection of road marking material onto the road when the supply of road marking material from the tank to the rotating body is interrupted or stopped. It is known to provide shutters that can be opened and closed.

For example, ■ An example of rotating a shutter that is concentric with the rotating body at a position where it is almost in contact with the rotating body is the Utility Model Act of 1983-73.
As shown in Publication No. 32, etc., when the shutter is closed, material remains between the rotating body and the shutter, which increases the load on the rotating body, reduces the rotation of the rotating body, and as a result, normal marking cannot be done. ■ An example of using a horizontal shutter is JP-A-51-1.
In the latter case, as shown in Japanese Patent Application Laid-open No. 21047 and Japanese Patent Application Laid-Open No. 52-134233, the materials accumulated on the horizontal shutter are collected into a collection container provided below the horizontal shutter. Due to the narrow space between the road surfaces, the size of the collection container is limited, and the container must be replaced frequently during road marking.Also, as shown in the former publication, materials on the horizontal shutter cannot be collected using a rotating body. There is a method of collecting the material by scraping it up and injecting it together with the material newly supplied from the tank, but in this case, it is difficult to strike a balance between removing the material on the shutter and stable jetting.

(Specifically, in order to reliably remove the material on the shutter, it is desirable to move the shutter as slowly as possible, but on the other hand, in order to clearly form the broken line surface, it is recommended to move the shutter at a speed similar to the marked speed. The present invention solves these problems.

That is, the present invention includes a rotating body for spraying molten road marking material, and a shutter that can be opened and closed and is provided at a distance below the rotating body and can block the spraying of the road marking material onto the road. In the road marking applicator, the shutter is opened and closed by rotation, and as the shutter is opened, the inner surface of the shutter sequentially contacts one end of the scraping machine, and the scraping machine is configured such that the material adhering to the inner surface of the shutter is scraped off. The present invention relates to a road marking applicator comprising:

In the present invention, the shutter is opened before or after the molten road marking material is sprayed by the rotating body, and the supply of the molten road marking material to the rotating body is promptly stopped before or after the shutter is closed. is preferable in order to perform marking application with sharply demarcated edges.

One or more rotating bodies may be provided as long as they can spray the molten road marking material, and those having square grooves, triangular grooves, etc., and those having brushes on the surface can be used.

When there is only one rotating body, it is preferable to attach a stator, a pressure contact piece, etc. in order to adjust the injection direction of the material and the size of the sprayed particles.

The size, position, etc. of the stator are appropriately determined in consideration of the injection direction and the size of the sprayed particles.

FIG. 1 schematically shows the positional relationship of the rotating body, the shutter, and the scraping machine (particularly showing the scraping plate) when viewed from the side.

In FIG. 1, a shutter 1 opens and closes by reciprocating on an arc of a circle a.

The inner surface of the shutter 1 overlaps the circumference of the circle a.

Furthermore, the rotating body 2 and the scraping plate 3 are located within the circle a.

In FIG. 1, the shutter 1 is in the closed state and 1'
is in the open state.

The rotor 2 is above the shutter 1 in the closed state and has a width sufficient to block the jetting of road material by the rotor 2.

One end of the scraping plate 3 sequentially contacts the inner surface of the shutter 1 as the shutter 1 is opened.

One end of the scraping plate that contacts the shutter is located at or below the lower end of the shutter 1' in the open state.

In the above, the explanation was given by temporarily drawing a circle a, but the shutter does not necessarily have to move along the circle a, and the position of the shutter 1' when it is open is as a result relative to the position of the shutter 1 when it is closed. What is necessary is to position it at a position moved upward and horizontally.

One end of the scraping plate is preferably pressed against the inner surface of the shutter using a spring or the like for effective scraping.

Therefore, the inner surface of the shutter 1 does not need to overlap the circumference of the circle a, and may have a different curvature from the circle a.

Note that the scraping board may be a single plate or may be in the shape of a tanzak.

Further, the scraper may be a brush roll, whether or not it rotates.

Next, the present invention will be explained in detail with reference to FIG.

FIG. 2 is a side view of the road marking applicator according to the present invention.

A supply shutter 2 is installed in the tank 1, and the molten road marking material from the tank 1 is supplied to the rotating body 4 through the supply port 3.

A stator 5 is attached to the rotating body 4.

The shutter 6 is in a closed state.

The shutter 6 is connected to a rotary actuator 8 by an arm 7, and as the rotary actuator 8 is driven, the shutter 6 moves to a position 6' when opened.

The scraping board 9 traces a trajectory (
When the shutter 6 is opened, its one end comes into contact with the inner surface of the shutter 6 and scrapes off material adhering to the inner surface of the shutter 6.

The other end of the scraping plate 9 is supported by a shaft 10, a guide rod 11 passes through the scraping plate 9, and one end of the scraping plate 9 is pressed against the inner surface of the shutter 6 by a spring 12.

This spring is pressed by the air cylinder 13.

The air cylinder 13 pushes out a spring so that one end of the scraping plate 9 is pressed against the inner surface of the shutter 6 when the shutter 6 is opened, and when the shutter 6 starts to close, the pressure is released and the shutter 6 is smoothly closed. do.

The material scraped off by the scraping plate 9 falls and is collected in the receiver 14.

Note that the supply shutter 2 is driven by an air cylinder 15.

Note that the rotating body 4 includes a prime mover 16 and each pulley 17.
and 18 and (1) are connected by a belt 19 so as to be rotated.

Each of the above parts is supported by the frame 20.

The surroundings of the rotating body will be explained in more detail as shown in FIG. 3.

That is, a heat insulating cover 21 is provided around the rotating body 4, and the rotating body is heated through the heat insulating cover.

In the present invention, since the shutter is separated from the rotating body, the shutter can be moved freely without affecting the movement of the rotating body (i.e., marking work).

In addition, since the material adhering to the shutter is taken out to a receiver outside the system, it has become possible to achieve both complete removal of material and good broken line markings, which was difficult to achieve with a mechanism that returns the material to the raw material side.

Furthermore, since the shutter is rotatable, the limitations on receiver capacity caused by the lack of space between the horizontal type and the road surface have been significantly alleviated.

The above three points are individually already known technologies, but
By combining all three points, we have solved the problems associated with broken line markings in rotating body coating equipment at once.

In the road marking applicator according to the present invention, it is essential to install a scraping plate in order to forcibly remove material adhering to the shutter.

Further, in order to facilitate scraping, it may be preferable to increase or further reduce the viscosity of the material adhered to the shutter by cooling it, and in this case, it is preferable to install a shutter heating device.

For this purpose, there is a method of embedding an electric heater in the shutter itself.
This can be done by conventional means such as attaching a gas burner 22 to the front part (closed state).

[Brief explanation of the drawing]

FIG. 1 is a side view schematically showing an example of the road marking applicator according to the present invention, FIG. 2 is a side view showing the state of the road marking applicator according to the present invention during road marking application, and FIG. is a side view of the vicinity of the rotating body.

Claims (1)

[Scope of utility model registration request] In a road marking coating device having a rotating body for spraying molten road marking material and an openable/closable shutter provided spaced apart below the rotating body and capable of blocking the spraying of the road marking material onto the road. The scraper is installed so that the shutter opens and closes by rotating, and as the shutter opens, the inner surface of the shutter sequentially comes into contact with one end of the scraper, and the material adhering to the inner surface of the shutter is scraped off. road marking applicator.