JPS644891Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) This invention is attached to a road surface painting machine used to apply markings such as crosswalks and safety zones on the road surface.
This invention relates to an improvement in a bead scatterer that scatters beads (glass particles) onto the upper surface of paint immediately after it has been applied to a road surface.

(Background technology) Crosswalks and other markings are drawn by applying highly viscous paint mixed with pigments to the road surface, but beads are mixed into the paint to make it easier to see at night. It is. However, the beads mixed in the paint in advance have a higher specific gravity than the paint, so they sink downward until the paint cools and solidifies, and the beads are not present in the upper layer of the drawn division line. will cease to exist.
For this reason, in addition to the beads mixed in the paint in advance, it is also possible to scatter beads on the top of the paint immediately after it is applied to the road surface and before it solidifies, so that the beads are also present in the upper layer of the lot line after it hardens. It is being done.

As such, a bead scatterer as seen in Japanese Utility Model Application Publication No. 57-202407 is known as a scatterer for scattering beads on the upper surface immediately after coating. As shown in Figs. 1 and 2, this bead scatterer is equipped with a short pipe 2 for connecting the lower end of a bead feeding hose to the center of the upper surface of a box 1 that is open at the bottom. An on-off valve 3 is fixed to the lower end opening of the on-off valve 3, and this on-off valve 3 has a hole 4 with a circular cross section and a hole 4 with a circular cross section.
and a through hole 5 that communicates with the inside of the box body 1, and the hole 4 mentioned above.
In the hole 4 of the valve box 7, which has a through hole 6 that communicates with the outside, a valve body 8 is rotatably provided with a cylindrical portion that can be inserted into the hole 4 without a gap at both ends of a valve plate portion 8a having a trapezoidal cross section. A recess 9 is formed at the external opening of the through hole 6 that is perpendicular to the through hole 6, and an adjustment plate is inserted into the recess 9 to freely connect and disconnect both the through holes 5 and 6. 10 can be inserted in and out freely, and this adjustment plate 1
0 is pressed in the direction of protrusion from the recess 9 by the spring 11, and the screw 13 inserted into the recess 9 from the outer surface of the valve joint 7 through the circular hole 12 is screwed into the screw hole 14 of the adjustment plate 10, and the screw 13 is inserted into the recess 9 of the adjustment plate 10. The amount of protrusion from 9 can be adjusted freely, and has the effect of evenly distributing beads.

However, the above-mentioned bead spreader still has the following disadvantages. That is,
The above-mentioned bead spreader is attached to a painting machine that moves at a relatively high speed, such as a road painting vehicle that paints road markings while moving, so even when the amount of beads spread is set to a minimum, the amount is considerably large. That is, since the maximum diameter of the beads is about 0.8 m/m, the width of the gap between the edge of the through hole 6 and the adjustment plate 10 is at least 1 m/m.
Even in this case, the amount of beads to be scattered is quite large, but the amount of beads to be scattered is too large for a low-speed road surface coating machine that is manually moved, such as a crosswalk coating machine.

(Object of the present invention) The present invention aims to eliminate the above-mentioned inconveniences and provide a bead sprayer for a road surface coating machine that can stably spray a small amount of beads.

(Structure of the present invention) The bead scatterer for a road surface coating machine of the present invention has a curved constriction passage whose width can be adjusted at the lower end of a storage container for storing beads, and a storage container and a constriction passage slightly above the constriction passage. A rotary shutter is provided to control communication with the

(Operation of the present invention) Since the bead scatterer for road surface coating machines of the present invention is constructed as described above, when the shutter is opened and the beads in the storage container are sent into the throttle passage, the beads will flow through the throttle passage. It flows down while bending, and is evenly dispersed from the lower end opening of the throttle passage onto the upper surface of the paint just after it has been applied to the road surface.

(Embodiments of the present invention) Next, the present invention will be explained in more detail while explaining the illustrated embodiments.

Figures 3 to 7 show an embodiment of the bead scatterer of the present invention, with Figure 3 being a front view showing the overall configuration, Figure 4 being an enlarged BB sectional view of Figure 3, and Figure 5 being Same C
-C sectional view, FIG. 6 is a perspective view of the end of a pair of fixed members and sliding members that constitute a bead throttle passage, and FIG. 7 is a perspective view of an end plate that supports both ends of these members. be. The bead scatterer includes a pair of fixing members 17 and 18 at the lower end opening of a storage container 16 having a rectangular and cylindrical cross section and having a lid 15 that can be opened and closed at the upper end opening.
and one sliding member 19. On the inner surface of one fixed member 17,
A first vertical surface 21, a protruding portion 22 having a chevron-shaped cross section, a second vertical surface 23, and a lower end protrusion 24 are formed in this order from the top. On the inner surface of the other fixing member 18, an inclined surface 26 is formed at the lower end of the vertical surface 25.
Further, on the inner surface of the sliding member 19, an inclined surface 27, an intermediate protrusion 28, and a lower end vertical surface 29 are formed in order from the top. The height of the intermediate protrusion 28 of the sliding member 19 is lower than the height of the second vertical surface 23 of one of the fixing members 17, and there is a gap between the inner surface of the fixing member 17 and the inner surface of the sliding member 19. The throttle passage 20 is bent to
is formed. Each fixing member 17,
Both ends of 18 are connected to an end plate 31 by screws 30, 30.
and both ends of the sliding member 19 are fixed to this member 1.
It is supported on the end plate 31 by slidably engaging a convex portion 32 formed on the end face of the end plate 9 with a groove 33 formed on the inner face of the end plate 31. Sliding member 19
There are recessed holes 3 on the inner surface of both ends of the
A compression spring 3 is formed inside the recessed hole 34.
5 is brought into elastic contact with the inner surface of one of the fixed members 17 to impart elasticity to the sliding member 19 in the direction of moving away from the fixed member 17 and widening the width of the throttle passage 20. On the other hand, a flange portion 36 is formed at the rear edge of the end plate 31 (lower edge in FIG. 5), and is bent inward from the end plate 31 at a right angle.
The end face of a butterfly screw 38 screwed into a screw hole 37 formed in is brought into contact with the rear face of the sliding member 19. Therefore, by rotating the thumbscrew 38, the flange portion 36
By adjusting the amount of protrusion of the threaded portion from the front surface of the screw, the width of the throttle passage 20 formed between one of the fixed members 17 and the sliding member 19 can be changed, and the water is dispersed downward through this throttle passage 20. The amount of beads added can be adjusted. Further, a shutter 40 for controlling communication between the inside of the storage container 16 and the throttle passage 20 is provided in a passage 39 formed between the fixing members 17 and 18 above the throttle passage 20. This shutter 40 has a shaft 41 whose both ends are supported on both left and right sides of the storage container 16, and a plate 4 having approximately the same width as the passage 39.
The shaft 41 is rotated by pushing and pulling a cable connected to a pin 44 eccentrically planted on the outer surface of a disk 43 fixed to one end of the shaft 41 outside the storage container 16. to open and close the shutter 40. That is, if the plate 42 is held horizontally as shown in FIG. 4, the passage 39 is closed and the dispersion of beads is stopped, and the plate 42 is moved from the state shown in FIG.
If you turn it 90 degrees, the passage 39 will open and the storage container 1 will open.
The beads in 6 are scattered downward through the passage 39 and the throttle passage 20.

In addition, in the illustrated embodiment, the storage container 16
By fixing short cylindrical holding cylinders 45, 45 on both left and right sides of the machine, and inserting a pair of support rods (not shown) fixed on the road coating machine side into these holding cylinders 45, 45, The bead spreader is attached to the road coating machine. The distance between the bead spreader and the road coating machine can be adjusted by sliding the holding cylinders 45, 45 along the support rods, so in the winter when the paint cools and hardens quickly, they are brought closer together, and in the summer when the paint cools and solidifies slowly, they are brought closer together. Beads can be kept away from the surface of the paint to ensure that they do not get mixed into the paint surface. Further, a guide plate 46 is attached at an angle to the lower surface of the lid 15 that closes the upper end opening of the storage container 16. This guide plate 46 guides the beads into the storage container 16 when filling the beads into the storage container 16 when the lid 15 is rotated a little more than 90 degrees counterclockwise in FIG. 4 about the shaft 47. , it is possible to facilitate the work.

(Effects of the present invention) Since the bead dispersing machine for road surface coating machines of the present invention is configured as described above, even if the minimum width of the throttle passage 20 is 1 m/m or more, the beads spread through the curved throttle passage 20. The speed decreases when passing, and the amount of beads sprayed per unit time is reduced, making it possible to smoothly spray small amounts of beads, and even when attached to a relatively slow road coating machine, an appropriate amount of beads can be sprayed. It can be done smoothly.

Furthermore, even if the shutter of the paint discharge port of the road coating machine and the shutter 40 of the bead sprayer are closed at the same time by the same lever, if the road coating machine is moved as it is, the space between the shutter 40 and the throttle passage 20 will be closed. As the beads remaining in the paint continue to be dispersed, the beads are evenly mixed into the paint. Furthermore, as mentioned above, the distance between the road coating machine and the bead sprayer changes between summer and winter, so the amount of beads that must be continuously sprayed after the shutters of the road coating machine and bead sprayer are closed also changes. do. For this reason, as shown in FIG. 8, another sliding member 48 is provided on the sliding member 19 that adjusts the width of the throttle passage 20, and this sliding member 48
0 and the throttle passage 20, and by changing the volume of this space 50, the amount of beads dispersed after the shutter is closed can be adjusted. That is, the thumbscrew 49 inserted from the rear surface of the other fixed member 18 is screwed into the threaded hole of this sliding member 48, and the compression spring 51 provided between the fixed member 18 and the fixed member 18 always directs the thumbscrew 49 into the space 50. It is oppressing. For this reason, in the summer, the thumbscrew 4
9 is sufficiently screwed into the screw hole of the sliding member 48 and the sliding member 48 is held at the solid line position in FIG. On the other hand, in winter, if the amount of threading of the thumbscrew 49 into the screw hole is reduced and the sliding member 48 is held at the position indicated by the chain line in FIG. 8, the volume of the space 50 can be minimized. As a result, the amount of beads scattered after the shutter is closed is reduced. In addition, in the example of FIG.
8 is formed to have the same height as one fixed member 17, and a compression spring 35 is provided between this fixed member 18 and presses a sliding member 19 for adjusting the width of the throttle passage 20. Therefore, the compression spring 35 is not exposed to the throttle passage 20 as shown in FIG. 5, and the flange portion 36 on the end plate 31 becomes unnecessary.

[Brief explanation of drawings]

Figures 1 and 2 show an example of a conventional bead scatterer, with Figure 1 being a front view and Figure 2 being A-A in Figure 1.
A sectional view, FIGS. 3 to 7 show an embodiment of the bead scatterer of the present invention, FIG. 3 is a front view showing the overall configuration, FIG. 4 is an enlarged BB sectional view of FIG. 3, Fifth
The figure is an enlarged cross-sectional view taken along the line C-C, FIG. 6 is an exploded perspective view of the constituting parts of the throttle passage, FIG.
The figure is a sectional view corresponding to the lower part of FIG. 4 showing the second embodiment. 1: Box, 2: Short pipe, 3: Open/close valve, 4: Hole,
5, 6: Through hole, 7: Valve box, 8: Valve body, 8a: Valve plate, 9: Recess, 10: Adjustment plate, 11: Spring, 1
2: Circular hole, 13: Screw, 14: Screw hole, 15:
Lid, 16: Storage container, 17, 18: Fixing member, 1
9: sliding member, 20: throttle passage, 21: first vertical surface, 22: protruding portion, 23: second vertical surface, 24:
Lower end protrusion, 25: vertical surface, 26, 27: inclined surface,
28: Intermediate protrusion, 29: Lower end vertical surface, 30: Screw, 31: End plate, 32: Convex portion, 33: Concave groove, 3
4: Recessed hole, 35: Compression spring, 36: Flange part,
37: Screw hole, 38: Butterfly screw, 39: Passage, 4
0: Shutter, 41: Shaft, 42: Plate, 43: Disc, 44: Pin, 45: Holding tube, 46: Guide plate,
47: shaft, 48: sliding member, 49: butterfly screw, 5
0: Space, 51: Compression spring.

Claims (1)

[Scope of utility model registration request] A fixing member 17 that is fixed to the lower end of the storage container 16 and a sliding member 19 that can freely move forward and backward in parallel to the fixing member 7 are provided at the lower end opening of the storage container 16 which is cylindrical and has a rectangular cross section. A road surface coating comprising a throttle passage whose cross section is curved between the mutually opposing inner surfaces of the members 17 and 19, and a rotary shutter provided above the throttle passage for controlling communication between the inside of the storage container and the throttle passage. Mechanical bead spreader.