JP4069309B2 - Course changing device and course changing method for self-propelled sweeper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a course changing device and a course changing method in a self-propelled polishing cleaner, in which a welded seam or the like of a floor surface of an oil tank is cleaned by emitting solid particles.
[0002]
[Prior art]
The floor of the oil tank is welded by regularly laying rectangular steel plates, and the welds are straight and horizontal, and after these straight welds have been cleaned by a self-propelled scrubber such as sandblasting In this case, the scouring moves linearly along the weld, but it must bend along a weld that is bent at a right angle, and there is a floating roof in the oil tank. Floating roof struts are standing at regular intervals to support this, and it is necessary to change the course of the scourer to avoid the floating roof struts.
[0003]
A conventional scourer for performing such scouring is that the scourer body is mounted on a self-propelled carriage and the steering mechanism of this self-propelled trolley is operated by the operator or the left and right drive wheels are rotated. Control was performed to correct the direction of travel, turn right angle, and avoid floating roof columns.
[0004]
[Problems to be solved by the invention]
The conventional abrading machine with a steering mechanism is long and large because of the handle part, and it is impossible to carry in from the side manhole of the oil tank. In addition to being necessary, there is a problem that due to the increase in size, accessibility to obstacles for avoiding obstacles is impaired, resulting in a large blast impossible portion.
[0005]
On the other hand, the rotation control system of the left and right drive wheels has a complicated structure of the drive device, which may cause a failure due to dust, and can be remotely operated by the operator, but frequent trajectory correction There is a problem that operation is required and skill of the operator is required.
[0006]
[Means for Solving the Problems]
In order to solve the above-described conventional problems, the present invention omits a complicated steering mechanism and a rotation control device for the left and right drive wheels, and the scourer is a self-propelled type that is straight forward only, and another handcart type In combination with a simple route conversion cart, the structure is simplified and miniaturized, and the oil tank can be loaded from the side manhole.
[0007]
In addition, it is almost unnecessary to change the direction for sharpening the straight weld, and only when it is necessary to change the direction by bending 90 ° along the weld on the floor plate or avoiding an obstacle. Workability can be improved by operating the conversion carriage to change the direction.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention includes a centrifugal projection type blasting means, a front wheel having one front central wheel, a self-propelled blaster that is driven straight by two rear left and right driving wheels, and a planar U-shape having an open front end. A shaft support that supports both ends of the drive wheel shaft of the self-propelled scrubber is provided at the front end of the frame, and a handle is erected on the rear end, and the lower rear end and a little behind the front end And a front-end portion of the frame that is lifted by a handle of the course-changing carriage and tilted forward and downward. After inserting the shaft below both ends of the shaft and pushing down the handle while the drive wheel shaft is in contact with the shaft support portion, the drive wheel shaft is lifted and the drive wheel is detached from the floor surface. The route changing cart is operated to change the route of the self-propelled abrasive. And was a diversion device in self-propelled Labs 掃機.
[0009]
Further, both end portions of the drive wheel shaft of the self-propelled polishing machine are provided in place of the shaft support portion at the front end portion of the frame that is inclined forward and downward, with the rear end portion of the course changing carriage raised. By pivotally supporting a bearing hole, connecting the self-propelled scourer and the course changing carriage, and lifting the drive wheel axle by pushing down a handle erected at the rear end of the course alteration carriage, It is a course change device in a self-propelled scavenger configured to change the course of the self-propelled scavenger by operating the course-changing carriage after the driving wheel is detached from the floor surface.
[0010]
In addition, it is equipped with centrifugal radiation type scouring means, and both ends of the drive wheel shaft of the self-propelled scouring machine with drive wheels on the left and right sides of the rear, with a free wheel on the lower side, and a front U-shaped open shape The forward end of the frame that protrudes further forward than the front universal wheel in a state where the handle is lifted and the frame is tilted forward and downward with a handle erected on the rear end of the frame. The frame is acted as a saddle to lift the drive wheel shaft and to disengage the drive wheel from the polishing surface. This is a method of changing the course in a self-propelled sweeper that changes the direction of travel of the sweeper.
[0011]
【Example】
Examples will be described with reference to the drawings. FIGS. 1 to 4 show a first example, FIGS. 5 to 7 show a second example, and in the description of the first and second examples, The common parts are described with the same reference numerals.
[0012]
[First embodiment]
1 to 4, A is a self-propelled scourer, B is a course change carriage, and the self-propelled scourer A has a main motor 1 driving a centrifugal projection unit 2 and an oil tank. A grinding material such as a steel ball is projected from the projection port 3 onto the floor surface F, the coating film, the scale of the welded part, etc. are peeled off and guided to the hopper 5 through the recovery path 4 together with the grinding material. The dust, such as a coating film and scale that has fallen by gravity to 2 and circulated and separated, is collected by another dust collector (not shown).
[0013]
This self-propelled sweeper A is installed at a rear side, a pair of left and right drive wheels 8 fixed near the left and right ends of a drive wheel shaft 7 driven by a self-propelled electric motor 6, and one wheel at the front center. It has a structure in which it has a front wheel 9 that idles and runs straight ahead.
[0014]
The course changing carriage B is provided with shaft support portions 11 that support both end portions of the driving wheel shaft 7 of the self-propelled scouring machine A on the upper surface of the front end of the planar U-shaped frame 10 with the front end open, and rises from the rear end. A grip 12 having a grip bar placed horizontally at the upper end is held, and a pair of left and right universal wheels 13 are attached to a position slightly rearward and rearward from the lower front end of the frame 10.
[0015]
The handle 12 of the course changing carriage B is lifted, the frame 10 is tilted forward and downward, and the tip of the frame 10 projects outwardly from the drive wheel 8 of the self-propelled abrader A as shown in FIG. When the drive wheel shaft 7 is inserted into the lower side of the drive wheel shaft 7 and the drive wheel shaft 7 is brought into contact with and supported by the shaft support portion 11, only the free wheel 13 on the front end side contacts the floor surface F, and the free wheel 13 on the rear end is It is in a state of floating away from the floor surface F.
[0016]
When the handle 12 is pushed down in the direction of the arrow S in this state, the frame 10 acts as a scissor with the free wheel 13 at the tip side as a fulcrum, and the drive wheel shaft 7 is lifted to the state shown in FIG. Leaves the floor F.
In this way, the drive wheel 8 is separated from the floor surface F, and the self-propelled abrader A is in a state where only one front wheel 9 at the center of the front end is in contact with the floor surface F. The course of the self-propelled sweeper A can be freely changed.
[0017]
When the course change is completed and it is desired to go straight, remove the pressure applied to the handle 12 of the course change carriage B and return to the state shown in FIG. 3, and remove the course change carriage B from the self-propelled abrader A. Thus, the drive wheel 8 is in contact with the floor surface F, and the self-propelled scouring machine A can continue the scouring while the self-propelled scouring machine A is traveling straight ahead.
[0018]
[Second Embodiment]
5-7, A is a self-propelled scourer, C is a course change cart, self-propelled scourer A is the same as the said 1st Example, and course change cart C is Instead of the shaft support portion 11 provided at the front end portion of the U-shaped frame 10 in the first embodiment, only the bearing hole 14 is provided, and the other configuration is the same as that of the course changing carriage B.
[0019]
As shown in FIG. 5, both end portions of the drive wheel shaft 7 are inserted into the bearing hole 14, the frame 10 is inclined forwardly downward, and only the free wheel 13 on the front end side is in contact with the floor surface F, and the free end of the rear end is free. The wheel 13 is lifted away from the floor surface F, and the handle 12 is moved straight up and sharpened while being lifted.
[0020]
When it is desired to change the course, as in the case of the first embodiment, the handle 12 is pushed down in the direction of the arrow S from the state shown in FIG. 5, and the drive wheel 8 is moved away from the floor F in the state shown in FIG. The path of the self-propelled scouring machine A can be freely changed by the operation of C. When the course change is completed and it is desired to go straight, release the handle 12 of the course change carriage C, the state returns to the state shown in FIG. It is self-propelled, but it is cleaned up.
[0021]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0022]
According to the present invention, since the steering device for changing the course of the scouring machine, the rotation control device for the left and right wheels, etc. are unnecessary and the very simple hand truck type course changing trolley is used, the scouring machine itself is The structure becomes simple and the size is reduced, and it is possible to carry in / out from a narrow entrance / exit of an existing oil tank, and it is possible to save the trouble of carrying in / out by conventional disassembly.
[0023]
By configuring the scouring machine as a straight-running self-propelled type, it becomes almost unnecessary to correct the course when scouring along a straight weld, and the work becomes easy.
[0024]
When avoiding obstacles or turning 90 ° along the weld, it is possible to change the course easily by using a course change cart, and the scouring machine itself is small. It can be turned small in the vicinity, and the blast dead space can be reduced.
[0025]
Since a special control device is not required to change the course, a large control panel is not required, and it is possible to operate with an extremely small control box. Since the structure is simple, it can be provided at low cost.
[Brief description of the drawings]
FIG. 1 is a side view of a self-propelled abrader and a course changing carriage according to a first embodiment of the present invention.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is a view showing a state in which a course changing carriage is combined with a self-propelled abrasive.
FIG. 4 is a view showing a state in which a drive wheel shaft is lifted by a course changing carriage.
FIG. 5 is a side view showing a second embodiment of the present invention.
6 is a plan view of FIG. 5. FIG.
7 is a view showing a state in which the drive wheel shaft is lifted by the course changing cart from the state of FIG. 5;
[Explanation of symbols]
A Self-propelled sweeper B Course change carriage C Course change carriage F Floor 1 Main motor 2 Centrifugal projection unit 3 Projection port 4 Collection path 5 Hopper 6 Self-propelled motor 7 Drive wheel shaft 8 Drive wheel 9 Front wheel 10 Frame 11 Shaft support 12 Handle 13 Swivel wheel 14 Bearing hole

Claims (3)

In a course changing device in a self-propelled scrubber, which is used in an oil tank and radiates and solidifies a welded seam of the floor of the tank, equipped with a centrifugal projection type scouring means , A self-propelled scavenger (A) that goes straight by a front wheel (9) of one front center wheel and two rear left and right drive wheels (8), and a planar U-shaped frame (10 ) Is provided with a shaft support portion (11) for supporting both ends of the drive wheel shaft (7) of the self-propelled abrader (A), and a handle (12) is erected at the rear end. It consists of a course change carriage (B) with a pair of left and right universal wheels (13) attached slightly behind the lower rear end and the front end, and the front end of the frame (10) of the course change carriage (B). the position of the wheel (13), the front, the shaft support portion (11) is provided, the handle (12) of the course change carriage (B) The front end portion of the frame (10) tilted upward and downward is inserted into the lower side of both ends of the drive wheel shaft (7) of the self-propelled abrader (A), and is attached to the shaft support portion (11). With the drive wheel shaft (7) in contact, the handle (12) is pushed down to lift the drive wheel shaft (7), and the drive wheel (8) is detached from the floor surface. To change the course of the self-propelled scouring machine (A). In a course changing device in a self-propelled scrubber, which is used in an oil tank and radiates and solidifies a welded seam of the floor of the tank, equipped with a centrifugal projection type scouring means , A self-propelled scavenger (A) that goes straight by a front wheel (9) of one front center wheel and two rear left and right drive wheels (8), and a planar U-shaped frame (10 ) Is provided with a bearing hole (14) for supporting the drive wheel shaft (7) of the self-propelled scouring machine (A), and a handle (12) is erected at the rear end, It consists of a course change carriage (C) with a pair of left and right universal wheels (13) attached slightly behind the rear end and the front end, and the rear end side of this course change carriage (C) is lifted and inclined forward and downward. frame (10) and the tip portion, and a bearing hole provided in front of the tip of the universal wheel (13) (14) The both ends of the drive wheel shaft (7) of the self-propelled scouring machine (A) are pivotally supported, and the self-propelled scouring machine (A) and the course changing carriage (C) are connected to each other. The drive wheel shaft (7) is lifted by pushing down the handle (12) of C), the drive wheel (8) is detached from the floor surface, and then the course changing carriage (C) is operated to perform self-propelled cleaning. A course changing device in a self-propelled polishing machine configured to change the course of the machine (A). Using the diverter apparatus in the self-propelled Labs掃機according to claim 1 or 2, is used in the oil tanks, the welded seams of the floor of the tank, to blast by radiating solid particles, self In the course changing method in the traveling type scavenger, centrifugal radiation type cleaning means is provided, and both ends of the driving wheel shaft of the self-propelled cleaning machine having driving wheels on the left and right sides of the rear are arranged with a free wheel on the lower side. Holding the front end of the flat U-shaped frame with the handle open at the rear end of the course changing cart, lifting the handle and tilting the frame forward and lowering the front forward wheel The tip of the frame protruding in the direction is supported rotatably, and the handle is pushed down, so that the frame acts as a scissors to lift the drive wheel shaft, and the drive wheel of the self-propelled scrubber The above-mentioned Change the traveling direction of formula Labs 掃機, diversion method in self-propelled Labs 掃機.

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