JPH04223898A - Circular motion mechanism for water jet nozzle tip - Google Patents

Abstract

PURPOSE:To obtain a moving device of a water jet nozzle for a road surface chipping device which chips an asphalt road surface efficiently by water jet. CONSTITUTION:Nozzle fitting bars 1, 2 are moved with an upper spherical face slide bearing 13 as the fulcrum via a crank rod 27 by the rotation of a cam 19 connected to an electric motor, etc., the nozzle at the bar lower end executes a precession like circular motion, the water jet is uniformly injected onto an asphalt road surface by combining the lateral movement and advance movement of the whole device therewith and the road surface, etc., are chipped efficiently.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle moving device for a water jet for use in a road surface chipping device that efficiently removes asphalt road surfaces by jetting water.

0002

2. Description of the Related Art FIG. 12 shows a nozzle swing mechanism in a conventional road surface chiseling device. 31 in the figure
is an ultra-high pressure hose, 32 is a nozzle lance (made of ultra-high pressure stainless steel pipe), 33 is a nozzle, 34 is a nozzle mounting rod, 35 is a swing pin, 36 is a cam, 37 is a swing rod, 38 is a pin, 39 is a 40 is a road surface, 41 is asphalt laid on a steel deck, and 42 is a steel deck. The swing rod 37 of the nozzle 33 swings as the cam 36 rotates, swings around the swing pin 35, and swings as shown in FIG. 13 by combining lateral movement and forward movement. Migrate trajectory. In this case, the movement locus of the nozzle tip becomes a waveform curve.

0003

[Problems to be Solved by the Invention] The nozzle moving device (road chiseling robot) in the conventional road chiseling device described above is a mechanism in which the nozzle swings (oscillates) and is combined with lateral movement and forward movement. Since the movement locus of the tip of the water jet nozzle is a zigzag waveform curve as shown in FIG. 13, the destructive force of the water jet water could not be sufficiently exerted for chiseling asphalt on a steel deck. Therefore, there is a problem in that the asphalt between the two nozzle movement trajectories (section A in FIG. 13) cannot be effectively blown away by the water jet. The present invention solves the above-mentioned problems and provides a road surface chipping device that efficiently chips away road surfaces by spraying jet water evenly onto the road surface by moving the nozzle tip in a circular motion and combining repeated lateral movement and forward movement. This is what we are trying to provide.

0004

[Means for Solving the Problems] Therefore, the circular motion mechanism of the water jet nozzle tip of the present invention includes a nozzle rod support portion having spherical bearings at the upper and lower portions, and a nozzle rod supported by the nozzle rod support portion. The nozzle rod is characterized by comprising a crank mechanism connected to the nozzle rod support section for circularly moving the tip of the nozzle rod, and a cam mechanism for swinging the crank mechanism.

[0005]

[Operation] When the cam mechanism 19 shown in FIG. 5 is rotated, the nozzle at the tip of the nozzle lance moves circularly about the upper spherical bearing as a fulcrum by the movement of the crank rod 27 connected thereto. By combining this with the lateral movement and forward movement of the entire device, the trajectory of the water jet will become as shown in Figure 11, and the chiseling depth of the asphalt will be deeper at the outside than at the center of the circular movement, as shown in Figure 10. , The part (part B in Figure 11) that is not directly hit by the water jet between the two water jet trajectories is also blown away by the force of the ultra-high pressure water, increasing the efficiency of asphalt chiseling work. becomes.

[0006]

[Embodiment] An embodiment of the present invention will be explained below with reference to the drawings. Figs. 1 to 8 show an embodiment of the present invention.
is a front view of the nozzle lance mounting rod, Figure 2 is a side view of the same,
FIG. 3 is a top view of the same. 4 to 8 are explanatory diagrams of the rotation mechanism of the nozzle lance attachment rod that moves in a circular motion, and FIG.
is a sectional view taken along the line AA in FIG. 1, FIG. 5 is a sectional view taken along the line BB in FIG. 2, FIG. 6 is a sectional view taken along the line CC in FIG. 4, and FIG. 7 is a sectional view taken along the line DD in FIG.
FIG. 8 is a sectional view taken along line E-E in FIG. In FIGS. 1 to 3, the nozzle lance attachment rod is divided into two parts, an upper part 1 and a lower part 2. 3 is a flat part machined to prevent the rod from rotating; 4 is an upper spherical sliding bearing connection part that serves as a support point when rods 1 and 2 move in a circular motion; and 5 is a lower portion that allows the rod to move in a circular motion. The spherical sliding bearing connecting portion 6 is a U bolt hole for mounting a nozzle lance. The nozzle lance 7 is fixed by a U bolt 8. 4 to 8, 9 is a fixed axis;
10 is a spherical sliding bearing, 11 is a spherical surface, 12 is a hole for stopping the rotation of rod 1, 13 is a spherical bearing that supports rod 1, 14
is a spherical surface, 15 is an arm for supporting the rod 1 and receiving reaction force, 16 is a mounting bolt for the arm 15, 17 is a spherical bearing connected to the shaft 5, 18 is a spherical surface, 19 is a cam hardware, 20 is a cam center,
21 is a cam stroke, 22 is a cam pin, 23 is a spherical sliding bearing, 24 is a spherical surface, 25 is a position fixing hardware, 26 is a round bar-shaped leg of the position fixing hardware 25, and 27 is an arm (crank rod). Note that FIGS. 9 to 11 are functional explanatory diagrams of the present invention.

Next, the operation of the device of the present invention will be explained. As the cam 19 connected to an electric motor or the like rotates, the cam pin 22 moves circularly in the direction of the arrow from the point A in FIG. 9, and the central portion is fixed in position. The actuation of the arm 27 causes the tip of the arm to make a circular motion in the direction opposite to the cam pin from point A' in FIG. 9 in the direction of the arrow. The rods 1 and 2 are supported by an upper spherical sliding bearing 13, and are restrained by a supporting metal fitting 15 at the upper portion, so that the lower ends of the rods move circularly in the shape of a sliding pin while being fixed in position by the bearing 13. As mentioned above, since the nozzle lance is fixed to the rod with a bolt, the tip of the nozzle lance, that is, the nozzle, moves circularly. The trajectory of the water jet sprayed from the nozzle is as shown in FIG. 11 by combining lateral movement and forward movement, and a trajectory as shown in the figure is drawn on the road surface. To explain in more detail with reference to FIGS. 4 to 8, when the cam mechanism 19 rotates, an arm 2 is connected by a spherical slide bearing and whose center is fixed in position.
7, the nozzle fixing rod attached to the tip of the arm rotates in the opposite direction (in the direction of the arrow from FIG. 9A') to the cam rotation direction (in the direction of the arrow from point A in FIG. 9A). The nozzle fixing rod itself does not rotate because the upper end 3 of the rod is flattened and inserted into the elongated hole 12 of the rotation restraint fitting so that it does not rotate, and the tip of the rod moves circularly. A nozzle lance 7 (extremely thick ultra-high pressure stainless steel pipe) is fixed to the nozzle fixing rod with a U bolt 8, and the nozzle fixing rod itself is restrained from moving in the rod axis direction by a spherical slide bearing 13 at the top. The water jet does not fly upward due to the water reaction force. The tip of the nozzle lance (the tip is a nozzle) fixed to the nozzle fixing rod as described above moves in a circular motion by rotating the cam 19 by an electric motor or the like.

[0008]

As described above, according to the present invention, the nozzle at the tip of the nozzle lance moves circularly, the trajectory of water jetted water is as shown in FIG. 11, and the asphalt chiseling depth is as shown in FIG. The outer part of the circular movement is deeper than the center part, and the part between the jet water trajectories that is not directly hit by the water jet water (part B in Figure 11) is also affected by the force of the ultra-high pressure jet water. This will increase the efficiency of asphalt chiseling.

[Brief explanation of the drawing]

FIG. 1 is a front view of a nozzle lance mounting rod according to one embodiment of the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a sectional view taken along line AA in FIG. 1;

FIG. 5 is a sectional view taken along line BB in FIG. 2;

FIG. 6 is a sectional view taken along line CC in FIG. 4;

7 is a sectional view taken along line DD in FIG. 4. FIG.

FIG. 8 is a sectional view taken along line EE in FIG. 5;

FIG. 9 is an explanatory diagram of cam rotation and related movement of a nozzle lance attachment rod in the present invention.

FIG. 10 is a sectional view showing the depth of asphalt chiseling according to the present invention.

FIG. 11 is an explanatory diagram of a movement trajectory of jetted water according to the present invention.

FIG. 12 is a diagram illustrating a nozzle swing configuration of a conventional road surface chiseling device.

FIG. 13 is an explanatory diagram of a movement trajectory of water jetted by a conventional device.

[Explanation of symbols]

1, 2 Nozzle lance mounting rod 3
Flat part 4 Upper spherical plain bearing connection part 5
Lower spherical plain bearing connection part 7
Nozzle lance 13 Upper spherical plain bearing 17
Lower spherical plain bearing 19 Cam hardware 27 Crank rod

Claims (1)

[Claims] 1. A nozzle rod support having spherical bearings at the upper and lower portions; a crank mechanism connected to the nozzle rod support for circularly moving the tip of the nozzle rod supported by the nozzle rod support; A circular motion mechanism for a tip of a water jet nozzle, comprising a cam mechanism for swinging the crank mechanism.