JPH0651269B2 - Surface treatment equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a surface treatment apparatus capable of wiping dirt attached to the surface of various objects such as a hull or a building, polishing or grinding the object surface, or applying a polish or the like to the object surface. .

Conventionally, as a means for performing the surface treatment as described above on the object surface, wiping by moving along a surface while manually pushing a powered hand tool such as a rotating cloth disc or a grindstone against the treated surface by human power, Operations such as polishing, grinding, and application of a surface treatment agent were performed.

However, holding the weight of the hand tool for a long time, and pressing the hand tool against the surface to be treated with a constant force requires a great deal of effort to move the hand tool along the surface. However, there is a drawback that the quality of the surface after treatment varies from worker to worker because there are individual differences.

Further, a large amount of dust is generated during the surface polishing and grinding work, which poses a risk of dust damage to the worker.

The present invention, by utilizing the suction force of the suction cup to the object surface, it is not necessary to manually hold the self-weight of the surface treatment apparatus, and also it is not necessary to press the surface treatment apparatus against the object surface manually. The present invention proposes a surface treatment apparatus that also collects dust generated during surface treatment inside the apparatus by utilizing a suction action of a fluid extractor for making a negative pressure in the suction cup.

The present invention will be described with reference to the drawings of the first embodiment.
In FIG. 2 and FIG. 2, a rotating hollow shaft 3 whose rotation axis is perpendicular to the object surface 1 is attached to the center of the disk-shaped suction cup 2, and the entire circumference of the circumferential portion of the suction cup 2 is shown. A non-breathable flexible material 4 is attached.

Regarding the material of the flexible material 4, when cleaning the dirt on the object surface, woven cloth or non-woven cloth is used. When polishing or grinding the object surface, rubber mixed with abrasive particles is used. When applying an agent or the like, a liquid-containing sponge rubber or the like is used.

The suction cup 2 may be rigid or flexible enough not to deform excessively when rotated by the hollow shaft 3.

Although the hollow shaft 3 is not shown, the distance between the object surface 1 and the suction cup 2 can be freely changed by connecting it to a hollow flexible shaft.

A drive motor is connected to the hollow flexible shaft, and the hollow inside of the flexible shaft and a fluid extractor such as a vacuum pump or a liquid pump are connected to each other through a fluid rotary joint.

In the above apparatus, when the fluid inside the suction cup 2 is sucked by the fluid extractor, the internal pressure of the suction cup 2 becomes a negative pressure, and the suction cup 2 receives the external pressure B toward the object surface 1 direction. It is pressed against the object surface 1 by the suction cup 2.

Further, when the hollow shaft 3 is rotated, the flexible material 4 is rotated together with the suction cup 2 while being pressed against the object surface, and operations such as wiping, polishing, grinding or applying a surface treatment agent are performed.

At this time, the soft material 4 is attracted by the suction cup 2 to the surface 1
Since it is pressed against, the pressing operation by human force is unnecessary, and it is also unnecessary to hold the self-weight of the apparatus by manual force due to the friction between the soft material 4 and the object surface 1. However, in order to move the device along the surface of the object, external force such as human power is required.

Although a large amount of dust is generated during polishing or grinding, there is always a fluid flow from the outside of the suction cup 2 through the gap between the flexible material 4 and the object surface 1 into the suction cup 2, so the dust is not present. The fluid is sucked and transferred to the fluid extractor, and if a filter is attached to the fluid extractor, the dust will be collected by the filter.

3 to 8 show that the suction force of the suction cup should be increased,
It is drawing of the Example when the force which a flexible material is pressed on an object surface does not want to be so large. In this case, the friction between the object surface and the flexible material can be reduced, and since the suction force of the suction cup is large, it is possible to run the device on the object surface while adsorbing the device.

The inventor of the present invention has proposed the utility model publication No. 5694, 1982.
No. 3 proposes a technique of traveling on the surface of an object while the suction cup is adsorbed on the surface of the object.

3 to 5, a rotary shaft 3 having a hollow portion and a portion to which a V pulley 8 is attached is attached to the center of a suction cup 2 which is a rigid body, and the rotary shaft 3 includes two bearings 6 It is held by the cylindrical bearing box 5 via.

Further, in the hollow portion of the rotary shaft 3, a portion surrounded by the bearing box 5 has a large number of holes 31 in the circumferential portion thereof, and the bearing box 5 has a hose joint for mounting the flexible hose 16. A section 51 is provided.

Further, the bearing box 5 is equipped with a motor 10 for driving the rotating shaft 3 and a frame 11 for holding four wheels 12, and the frame 11 drives four wheels 12.
The individual motors 13 are mounted.

An annular plate 41 made of a non-breathable and flexible material such as rubber is attached to the entire circumference of the suction cup 2 and the annular plate 41 is further illustrated in FIGS. A flexible material 4 similar to that shown is attached.

Note that FIG. 8 shows that the device 0 shown in FIGS. 3 to 5 is connected to the filter 17 and the vacuum pump 18 via the flexible hose 16 and is connected to the object surface 1 such as the tank wall surface by the remote control operation. It is a diagram showing a scene where a surface treatment operation is performed while moving on the surface of an object while being adsorbed.

In the apparatus shown in FIGS. 3 to 5, when the suction action of the fluid extractor such as a vacuum pump connected to the flexible hose 16 is started, the fluid outside the suction cup 2 becomes the object surface 1 and the soft material 4. It flows into the inside of the suction cup 2 through the clearance between them, and further reaches the fluid extractor through the hole 31 of the hollow shaft 3, the inside of the bearing box 5, the hose joint 51, and the flexible hose 16.

When the fluid passes through a very narrow gap between the object surface 1 and the flexible material 4, a pressure loss occurs, so that the internal pressure of the suction cup 2 becomes lower than the external pressure, so that the suction cup 2 is pressed toward the object surface 1. Receive external pressure. That is, sucker 2
Adhesive force is generated.

Since the wheel 12 is mounted on the suction cup 2 via the hollow shaft 3, the bearing 6, the bearing housing 5, and the frame 11, this suction force is a force that pushes the wheel 12 against the object surface 1.

Further, since the distance between the suction cup 2 and the object surface 1 is kept constant by the wheel 12, the flexible material 4 and the annular plate 41 are not pressed against the object surface 1 by the suction cup 2,
The pressure difference between the fluid inside and outside the suction cup 2 prevents it from being pressed against the object surface 1 and flowing into the suction cup from the outside.

That is, the flexible material 4 and the annular plate 41 have a self-sealing function, and the force pressed against the object surface 1 is increased or decreased by the area that receives the pressure difference between the fluid inside and outside the suction cup 2 regardless of the suction force of the suction cup 2. It can be set arbitrarily.

This means that the friction between the soft material 4 and the object surface 1 can be reduced, and the friction between the wheel 12 and the object surface 1 can be increased, so that the suction cup 2 of the wheel 12 remains attached to the object surface 1. It can drive by itself.

Further, for the above reason, it is not necessary to increase the rotational torque of the suction cup 2, that is, the driving torque of the motor 10.

Note that FIG. 6 shows that the apparatus of FIGS.
Sucker 2, flexible material 4 and annular plate 41 when attracted to the
The state of is illustrated.

FIG. 7 shows that the function of the flexible material 4 in FIG.
1 illustrates a state integrated with one function. That is, in the case of the embodiment of FIG. 7, it is shown that the annular plate 41 can also have a surface treatment function.

As described above, the surface treatment apparatus of the present invention does not need to manually hold the self-weight of the surface treatment apparatus by using the suction force of the suction cup to the surface of the object, and the surface treatment apparatus is also manually operated. Therefore, it is not necessary to press it against the surface of the object, and by using the suction action of the extractor of the fluid to make the suction cup negative pressure, the dust generated during the surface treatment is also collected inside the device. Therefore, it has the effect of reducing labor and preventing dust damage.

Furthermore, if the device is of a self-propelled type and can be operated by a remote controller, it is possible to eliminate the need for a dangerous scaffold at a high place and reduce the cost required for temporary scaffolding.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II in FIG. 1, and FIG. 3 shows an embodiment different from the embodiment of FIGS. 1 and 2. FIG. 4 is a front view of one embodiment of the present invention, FIG. 4 is a left side view of the same, and FIG. 5 is II in FIG.
-II is a sectional view, FIG. 6 is a partially enlarged sectional view showing a state of the flexible material 4 and the annular plate 41 when the suction cup 2 in FIG. 5 is adsorbed on the object surface 1, and FIG. Flexible material 4
FIG. 8 is a partially enlarged sectional view showing a state in which the function of is integrated with the function of the annular plate 41, and FIG. 8 is a perspective view showing a usage example of the apparatus of FIGS. 3 to 5. Arrow A ... Suction fluid flow direction, Arrow B ... Suction force acting direction, 7 ... Seal, 9 ... V belt, 14 ...
Roller chain, 19 ... Engine, 20 ... Remote control cable, 21 ... Remote control box, 22 ... Collapse prevention device with rope winding drum, 23 ... Safety rope, 42
...... Bolt, 43 ...... Presser fitting

Claims (9)

[Claims] 1. A suction cup for adsorbing to a surface of an object by utilizing a differential pressure of a fluid, the suction cup having a rotary shaft at its center, the rotary shaft being perpendicular to the surface to be attracted and having a ventilation hole, The entire circumference of the circle has a sealing function that adheres to the surface to be adsorbed and prevents fluid from flowing into the suction cup, and a surface treatment function that performs processing such as polishing and wiping on the surface to be adsorbed. The inner space of the suction cup is connected to a fluid extractor for extracting the fluid from the inner space of the suction cup such as a vacuum pump or a liquid pump through the ventilation hole of the rotary shaft. A surface treatment device characterized by the above. 2. A flexible material attached to the circumferential portion of the suction cup,
In order to prevent the rigid portion of the suction cup from being excessively pressed in the direction of the attracted surface, it is necessary to have a rotating shaft holding mechanism for keeping the distance between the rigid portion and the attracted surface at a predetermined distance. Device as claimed in claim 1, characterized. 3. A flexible material attached to the circumferential portion of the suction cup,
Claim 1 characterized by having a so-called self-sealing structure that prevents fluid outside the suction cup from flowing into the inside by being pressed against the surface to be attracted by the pressure difference between the fluid inside and outside the suction cup. The apparatus according to any one of items 1 to 2. 4. A rotary joint for fluid is mounted on a rotary shaft of a suction cup, and the rotary joint and the extractor for fluid are connected by a flexible hose so as to communicate with each other. The apparatus according to any one of items 1 to 3. 5. A suction cup for adsorbing on the surface of an object by utilizing the differential pressure of a fluid, the suction cup having a rotating shaft at its center, the rotating shaft being perpendicular to the surface to be adsorbed and having a ventilation hole, The entire circumference of the circle has a sealing function that adheres to the surface to be adsorbed and prevents fluid from flowing into the suction cup, and a surface treatment function that performs processing such as polishing and wiping on the surface to be adsorbed. The inner space of the suction cup is connected to a fluid extractor for extracting the fluid from the inner space of the suction cup such as a vacuum pump or a liquid pump through the ventilation hole of the rotary shaft. In order to prevent the flexible material attached to the circumferential portion of the suction cup from being excessively pressed by the rigid body portion of the suction cup toward the attracted surface, the distance between the rigid body portion and the attracted surface is always set. Having a holding mechanism for the rotating shaft for holding at a specified distance Ri, moreover, a surface treatment apparatus, characterized in that the traveling means having a plurality of wheels or an endless rail or the like running on the adsorbed surface is mounted via a bearing for holding the rotary shaft. 6. Device according to claim 5, characterized in that it is fitted with drive motors for wheels or endless rails. 7. The device according to claim 5, wherein a drive motor for the rotary shaft of the suction cup is mounted on the traveling means. 8. The flexible material attached to the circumferential portion of the suction cup,
A so-called self-sealing structure for preventing fluid outside the suction cup from flowing into the inside by being pressed against the surface to be attracted by the pressure difference between the fluid inside and outside the suction cup. The apparatus according to any one of items 1 to 7. 9. A fluid rotary joint is mounted on a rotary shaft of a suction cup, and the rotary joint and the fluid extractor are connected by a flexible hose so as to communicate with each other. 9. The device according to any one of items 8 to 8.