JPS6237637Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sandblasting device that prevents dust particles such as rust containing waste sand generated during sandblasting operations from scattering in all directions.

Sandblasting equipment has traditionally been used to remove rust that has formed on the outer surfaces of ships entering dock for repairs.The sandblasting equipment is installed on the work stage of a self-propelled machine that is installed along both walls of the dock. Aboard the ship, sand was pumped through a hose attached to the self-propelled machine and sprayed onto the hull's outer skin through a nozzle to remove rust from the hull.

However, the work stage was open on all sides, and peeling rust and paint scum were scattered around the docks along with the sand blast. As a measure to prevent this powdery waste from scattering, fences have been set up around the docks, but there was a problem in that sandblasting operations could not be mixed with other work inside the docks.

In particular, repair ships are often required to shorten the construction period, so it is necessary to create an environment where other work can be carried out at the same time while sandblasting is being carried out.

The present invention has been developed in response to this, by limiting the scattering range of particulate waste such as rust, including waste sand generated by sand blasting on the surface to be sandblasted, to an enclosure with one side open. The present invention provides a low-pollution sandblasting device in which the open port is brought into pressure contact with the sandblasting surface to minimize leakage from the touch surface, and the powdery waste inside the enclosure is collected by a dust collector via a duct. .

An embodiment of the present invention will be specifically described with reference to the drawings.

What is shown in the drawings is an embodiment installed in a dock, and in FIG. 1, 1 is the dock, 2 is the bottom of the dock, 3 is the side wall of the dock, and 4 is a docked ship. A self-propelled machine 5 is guided by rails 6 and 7 laid on the dock side and the dock side wall surface, and is moved along the dock side wall 3 by a motor drive device (not shown). The self-propelled machine 5 has vertical legs 9 that extend downward from the driver's cab 8 and have wheels 9' guided by the rails 7 at the bottom, and the driver's cab 8.
It is equipped with an arm 10 consisting of a four-section rotating parallel link mechanism that can vertically swing and expand and contract within the dock, and a hydraulic cylinder 11 that operates the arm 10. A working stage 14 is provided at the tip of the arm 10. The stage 14 is always kept horizontal by a four-bar rotation parallel link mechanism and can move up and down along the side wall of the hull of the docked ship. The structure of the above-mentioned self-propelled machine is almost the same as the conventional one. Note that 12 in the figure is a wheel that rolls on a rail 6 laid on the side of the dock.

At the tip of the arm 10, a cage 13 in the form of a box that surrounds a sandblasting worker is installed on a work stage 14. The cage 13 is open to the front side corresponding to the surface to be sandblasted (hull side wall surface). cage 13
A bellows 15 is fixed along the edge of the opening of the bellows 15 with a bolt 16 as shown in FIG. It is fixed and provided in an annular shape. That is, the groove-shaped frame 17 is attached with its groove opening facing the surface to be sandblasted. It is preferable that the contact surface of the frame 17 with the hull side wall surface 25 be coated with rubber.

A plurality of springs 18 are arranged along the outer periphery of the cage 13 between the cage 13 and the frame 17 to urge the frame 17 outward. 19, 19' are springs 18
This is a mounting piece for attaching the . One end of a flexible duct 20 is opened through a hopper at the working stage 14, which is the bottom of the cage, and the other end is connected to the suction port of a dust collector 21.

Reference numeral 22 denotes a cart on which a dust collector 21 with wheels at four corners is mounted, which is placed on the culvert bottom 2, and is connected to a towing vehicle 23. A dust collector 24 is separately loaded on the trolley 22. The dust collector 24 is for sucking in particulate waste that leaks out from the gap between the frame 17 and the outer plate, which are pressed against the hull side wall surface 25 during sandblasting work.The other end of the flexible duct 26 that opens into the groove of the frame 17 is the dust collector. It is connected to 24 suction ports. 27 is a sand pressure feeding hose, and 28 is a sandblasting nozzle. It should be noted that during the sandblasting work, the cage 13 is always slightly pushed toward the side wall surface of the hull by the operator, but the insufficient pushing pressure is still applied by the spring 18. However, if pushed too hard, the frame at the tip will strongly slide on the hull outer plate, damaging the side wall surface, so care is taken to mount the sensor 29 facing the hull side wall surface and maintain an appropriate position. Sensors 29 are arranged on four sides of the frame 17, and signals from the sensors are sent to four signal lamps provided on an instrument panel located at the operator's driver's seat.

In the above structure, when the cage 13 is pressed against the hull side wall surface 25 by hydraulic pressure by the operator, the frame 17 is tightly pressed against the hull side wall surface 25 through the bellows 15 by the tension of the spring 18 without loosening. be done. cage 13
A blastman (not shown) grips the nozzle 28 of the sand pumping hose 27 and blasts the side wall surface of the ship with sand jetted from the nozzle. Waste sand, rust, paint scum, etc. after being pounded are collected in a dust collector 21 through a flexible duct 20 that opens at the bottom of the cage. Particle waste such as waste sand and rust that tries to leak out from the contact surface against the pressure of the spring 18 of the frame 17 that comes into contact with the hull side wall surface 25 is formed by the groove of the frame 17 and the hull outer plate. Since the air duct becomes negative pressure due to the suction of the dust collector 24, the particulate waste flows through the flexible duct 26 to the dust collector 2.
4, and there is almost no leakage from the touch surface. A cart 22 carrying dust collectors 21 and 24 is pulled by a towing vehicle 23 and follows along the bottom of the culvert as the self-propelled machine moves.

As described above, in the present invention, a cage with one side open surrounding the sandblasting man is installed in the self-propelled machine, and a frame biased by a spring is attached to the opening of the cage via a bellows. Therefore, good contact with the sandblasting surface is maintained, and the rust and paint scum removed by sand blasting are not scattered in all directions along with waste sand as in the conventional method, and other work can be done at the same time.

In addition, since the particulate waste is sucked into the dust collector through the duct opened at the bottom of the cage, the particulate waste does not accumulate inside the cage, and the particulate waste collected in the dust collector can be thrown away. Since it can be carried out at the same time, it is efficient because the conventional means of scraping up the powder waste can be omitted.

In the present invention, the frame is particularly groove-shaped and an air duct is formed between it and the surface to be sandblasted, which is pressed into contact with the surface. The leaking particulate waste is captured by the air duct, which has a negative pressure due to suction by the dust collector, and can be effectively prevented from scattering to the outside. Furthermore, sensors are attached to the four sides of the frame, and the signal sent by touching the surface to be sandblasted is sent to the cab instrument panel of the self-propelled machine, making it easy to adjust the pressing force of the frame against the surface to be sandblasted. , without damaging the surface to be sandblasted, and allowing the cage to slide smoothly.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an embodiment of the sandblasting device according to the present invention installed in a dock, Fig. 2 is an enlarged perspective view of the main parts of the present invention, as seen from the - arrow direction in Fig. 1, and Fig. 3 is a FIG. 2 is a sectional view taken along the line - in FIG. 2; 5: Self-propelled machine, 10: Arm, 13: Cage, 1
5: Bellows, 17: Frame, 18: Spring, 20, 26:
Flexible duct, 21, 24: Dust collector, 2
2: Truck, 25: Hull side wall surface (sandblasting surface), 29: Sensor.

Claims (1)

[Scope of utility model registration request] A box-like cage is installed horizontally at the end of the extendable arm of a self-propelled machine and is open on the side corresponding to the surface to be sandblasted, and a bellows is installed along the edge of the open opening of the cage. A groove bottom plate is fixedly attached to the open end surface of the bellows, and a frame having a groove-shaped cross section is provided in an annular shape, and a plurality of springs are interposed between the frame and the cage that bias the frame forward, one end of which is attached to the cage. A dust collector installed on a trolley, which is attached to the other end of a flexible duct that opens at the bottom of the frame and communicates with the inside of the cage, and one end of which is attached to the other end of the flexible duct that opens into the groove of the frame and communicates with the groove. A sandblasting device comprising a dust collector installed on the truck and sensors attached to four sides of the frame.