JPH0653349B2 - Rocking sandblasting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rocking sandblasting machine for injecting a cleaning agent onto a floor surface or a wall surface to perform a base treatment for coating, cleaning of a corroded surface, and the like. It is a thing.

(Prior Art) A blast machine for blasting a wall surface or a floor surface having a wide swing range of an injection nozzle by moving a machine base while swinging the injection nozzle of the sandblast machine is disclosed in an earlier patent of the applicant. (Japanese Patent Publication 53-6398, 6399).

The above machine has improved the efficiency remarkably as compared with the case of processing the surface to be treated by hand, but in this apparatus, the ejector nozzle is arranged on the same extension line with respect to the base end of the injection nozzle. Had the problem of becoming larger and taller. For example, when cleaning the inner bottom of a crude oil storage tank, a heating pipe is vertically and horizontally installed in the tank at a height of about 30 cm above the floor. The above-mentioned conventional blasting machine has a height of 1.20 to 1.30 meters and thus cannot be used for cleaning the inner bottom of a crude oil storage tank.

(Objective) An object of the present invention is to provide a device having the same performance as the sandblasting machine, which can be configured to be short and small and flat, and which can be used even in a narrow place.

(Structure) In the rocking type sand plast machine of the present invention, the rotary shaft (2) is rotatably arranged by penetrating the side wall (10) of the injection chamber (11) having the front opening, and one end of the rotary shaft is installed. An inflow hole (22) that projects from the side wall surface and is connected to the reciprocating rocking device (4) and extends from the end surface to the injection chamber is opened in the other end of the rotating shaft, and the open end of the inflow hole (22) is formed. A flexible blast hose (26) is connected to the injection shaft, the base end of the injection nozzle (3) is attached to the rotary shaft (2) in the injection chamber toward the injection chamber opening, and the injection nozzle is connected to the inflow hole (22). ).

(Operation) The blast hose (26) twists and rotates integrally with the reciprocating rotation of the rotating shaft (2), and at the same time, allows the pressurized air containing the polishing and cleaning material to flow and flow into the inflow hole (22) of the rotating shaft. The flow of the air cleaning material fills the inflow hole of the rotating shaft and is ejected from the injection nozzle (3).
By the oscillating rotation of the jet nozzle and the movement of the machine base, the surface to be processed is processed within the band-shaped range of the oscillating width.

(Effect) Since the abrasive cleaning hose is directly connected to the rotary shaft from the side to the injection nozzle, it does not become taller than the applicant's previous device,
It can be made small and flat.

(Examples) The examples shown in the drawings and described below are for explaining the present invention, and should not be construed to limit the invention described in the claims or to reduce the scope. I won't.

The sandblasting machine shown in the drawings is a device that is used for scouring and cleaning a vertical wall surface of a ship hull, a structure such as a building, or a floor surface. The casing (1) has an opening at the center of the front facing the surface to be processed, and the side and top surfaces are the casing.
The injection chamber (11) is covered by (1) and opens toward the front. Flange on the outside of the casing opening
(18) is projected, a plurality of wheels (13) are mounted on the flange to move on the surface to be processed, and the injection chamber opening is supported at a constant height from the surface to be processed. A flexible seal rubber (12) is attached around the flange (18) to prevent dust-containing air from the injection chamber (11) from flowing out.

The rotating shaft (2) freely rotatably penetrates both side walls (10) of the casing (1), the side wall penetrating portion is supported by the sliding bearing (20), and the bearing portion is airtightly held by the V ring (21). To do. Intake pipe (15) with intake port (14) on the side of injection chamber (11)
By connecting the suction hose (19) to the suction pipe (15), the abrasive cleaning material sprayed into the spray chamber (11) and the dust separated from the surface to be treated are sucked and further sprayed. The inside of the chamber (11) is kept at a negative pressure, and the atmospheric pressure causes the sandblasting machine to be pressed against the surface to be treated.

A cam (45) and a reciprocating drive device (4) described later are attached to one end of the rotary shaft (2) penetrating the side wall (10) to reciprocally rotate the rotary shaft within a range of about 90 degrees. At the other end of the rotary shaft, there is an inflow hole (22) that extends from the end face into the injection chamber (11) along the axis, and in the injection chamber a radius orthogonal to the axis of the rotary shaft is provided. The mounting screw hole (23) in the direction and the mounting screw hole (24) oblique to the axis of the rotary shaft are formed from the peripheral surface on the opposite side of the mounting screw hole. When attaching the injection nozzle (3) to one mounting screw hole, for example, the radial mounting screw hole (23), the other diagonal mounting screw hole
Plug (25) on (24) to close it. Injection nozzle (3)
Communicates with the inflow hole (22), ejects a mixed flow of one polishing agent of air supplied from the blast hose (26) in the direction of the injection nozzle, and injects it perpendicularly to the surface to be treated for polishing. .

When peeling of the surface layer of the surface to be treated is desired, the rotary shaft (2)
180 degrees and attach the injection nozzle (3) to the screw hole (2
The screw hole (24) may be replaced with the screw hole (24) and the screw hole (23) may be closed by the stopper shaft (25).

The reciprocating drive device (4) is a rotary actuator (trade name: High Rotor, manufactured by the manufacturer, which is fixed to the mounting bracket (43).
(Taiyo Kogyo Co., Ltd.), the drive shaft (44) penetrates the cylinder, and the control vanes alternately flow from the two ports (A) and (B) to let the internal vanes (not shown) inside the cylinder. The drive shaft (44) is moved to rotate the drive shaft (44) forward and backward.

Fix the contact piece (42) at one end of the drive shaft (44) and rotate it integrally with the drive shaft, and apply it to the mounting bracket (43) at the position of the rotation end of the drive shaft (44). Have decided. Drive shaft (44)
The tip of the is directly connected to the rotary shaft (2), and two limit valves (46) and (47) are arranged facing each other around the cam plate (45) attached to the rotary shaft. The rotation end of is detected and the flow of control air is switched alternately.

As shown in Fig. 4, the control air piping is the control air hose.
(5) is two limit valves in the manifold (50)
It is supplied to (46) (47) and the switching valve (51). The limit valves (46) (47) shown in the drawing show the piping condition when the anvil is free. Since the limit valve (47) facing the peripheral surface of the cam (45) having a short radius is in a free state, air from the control hose (5) is stopped and the switching valve (51) is stopped.
No control pressure is applied to the port (41).

On the other hand, the limit valve (46) in contact with the peripheral surface of the cam (45) having a large radial length is pushed by the cam to switch the control hose (5) to the port (40) of the switching valve (51). Then, the conduction direction of the switching valve (51) is changed, the control hose (5) is conducted to the port A of the reciprocating drive device (4), and the drive shaft (4) is rotated in one direction. At the turning end of the rotary shaft (2), the limit valve that the cam (45) pushes is switched, one valve (46) stops the inflow of control air, opens the port (40) of the switching valve, and the other limit bubble. (47) is pressed to switch the control air to the switching valve (5
Act on port (41) of 1). Due to the switching action of the switching valve (51), the control air flows into the port B of the reciprocating drive device (4), moves the internal vane (not shown) in the opposite direction, and reverses the drive shaft (44). It is a thing.

However, the blast hose (26) is supplied with pressurized air mixed with abrasives such as sand particles and fills the inflow hole (22) of the rotary shaft (2). The sand particles accumulate in the bottom of the inflow hole (22) to form a sand particle layer, and exert the cushioning action of the inflowing sand air.
The pressurized air filling the inflow hole (20) is jetted from the jet nozzle (3) into the negative pressure jet chamber (11) to jet the surface to be treated.

In the reciprocating drive device (4), the control air alternately flows into the ports A and B to rotate the drive shaft (44) in the forward and reverse directions.
Rotates reciprocally at a cycle of about 5 times per second to rock the jet nozzle (3). In the injection chamber (11), the cleaning material is sprayed on the surface to be polished within the range of the reciprocating swing of the injection nozzle, and the paint layer, chemicals, rust, dust, etc. adhering to the surface are peeled off, and the exhaust hose (19 ) Is sucked in and flows out.

The blast hose (26) integrally twists and rotates with respect to the reciprocating rotation of the rotary shaft (2), and the blast hose (26) and the rotary shaft
It is not necessary to provide a rotary joint such as a slide bearing for connection with (2).

Atmosphere flowing from the outside air intake and intake hole (16) is
1) Since it expands and flows in, it is possible to remove the polishing agent, dust, etc. accumulated on the side wall and the rotating shaft.

The sandblasting machine according to the present invention is a blast hose (26)
And the rotary shaft (2) with the injection nozzle mounted on the same straight line, the height is lower than that of the blast device previously proposed by the applicant, for example, the machine height can be 26.5 cm. Blast work is now possible even in a narrow space such as the inner bottom of a crude oil storage tank. Further, the handle (17) protruding from the machine base can be carried by hand, and the handling is easy.

The drawings and the description of the above embodiments are for explaining the present invention, and limit the invention described in the claims,
Alternatively, it does not reduce the range.

The configuration of each part of the present invention is not limited to the above embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

[Brief description of drawings]

FIG. 1 is a slope view, FIG. 2 is a partially cutaway slope view, and FIG.
The drawing is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is an air piping diagram. (1) …… Casing, (10) …… Sidewall (11) …… Injection chamber, (2) …… Rotating shaft (26) …… Blast hose, (3) …… Injection nozzle (4) …… Reciprocating drive apparatus

Claims (1)

[Claims] 1. A reciprocating oscillating device (4) in which a rotary shaft (2) is rotatably arranged so as to penetrate a side wall surface of an injection chamber (11) having a front opening, and one end of the rotary shaft projects from the side wall surface. The other end of the rotary shaft has an inflow hole (22) that extends from the end face to the injection chamber in the shaft body, so that a mixed flow of air and polishing agent can be directly supplied to the inflow hole (22). Flexible blast hose at the open end of the hole (22)
(26) is connected, the base end of the injection nozzle (3) is attached to the rotary shaft (2) in the injection chamber toward the injection chamber opening at a substantially right angle, and the injection nozzle (3) is connected to the inflow hole (22). A rocking sandblasting machine linked to.