JPH0833600A - Dome inwall cleaner - Google Patents

Abstract

PURPOSE:To reduce working time and improve work safety, by providing a prop on a rotary table which horizontally rotates on a base set near the center of a dome, and by attaching a cleaning brush to one end of the prop. CONSTITUTION:A dome inwall cleaner 1 has a rotary table 4 which rotates almost horizontally on a table base 2 set near the center of a dome 20. This cleaner is provided with a vertically turning prop 12, so supported as to pivot on the fulcrum 7 of a prop support part 6 provided upright on the rotary table 4. At one end of the prop 12 is a cleaning brush 17 and the other end is a counterweight 16, and a vacuum device 18 is connected to the cleaning brush 17 via a vacuum hose 19. Further, on the table base 2 is a table-rotating motor 5 for rotating the table 4, and on the rotary table 4 is a cylinder drive motor 10 for turning the prop 12 vertically. The inwall 20a is cleaned by rotating the rotary table 4 with the cleaning brush 17 in contact with the dome 20.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a device for cleaning the inner wall of a dome.

[0002]

2. Description of the Related Art When cleaning the inner wall of a substantially hemispherical dome represented by, for example, a planetarium dome, if the diameter of the dome is small, the inner wall can be cleaned with a brush or mop having a long handle. However, if the diameter becomes large, for example, more than 10 meters, most of the inner wall cannot be cleaned with a long-handled brush or mop, and in this case, the scaffold is assembled according to the inner wall of the dome. I was cleaning it.

[0003]

As described above, if the diameter of the dome is large, the inner wall of the dome cannot be cleaned with a brush or mop having a long handle, and it takes time to assemble the scaffold according to the inner wall of the dome. , The working time becomes very long. In addition, working at a high place is not only dangerous for the worker himself, but also may drop tools such as brushes, which poses a danger to those working on the floor. Such a very time-consuming and dangerous operation is very expensive. In addition, in the case of a planetarium for business purpose, it is impossible to operate during work, so the loss is also high.

An object of the present invention is to provide a dome inner wall cleaning device that solves the above-mentioned problems, shortens the working time, improves the working safety, and reduces the working cost.

[0005]

In order to solve the above-mentioned problems, the dome inner wall cleaning device of the present invention is installed in the vicinity of the central position of a substantially hemispherical dome, and has a base having a ring-shaped guide rail. , A rotary table that rotates substantially horizontally on the rails of the base, a column that is pivotally supported by a support portion provided on the rotary table and can rotate in a substantially vertical direction, and a column provided on one end side of the column. Cleaning brush, a counterweight provided on the other end of the support, a vacuum device connected to the cleaning brush via a pipe, and a rotary drive provided on the base to rotate the rotary table. And means for rotating the column in the vertical direction, the means being provided on the rotary table.

The support column includes a pipe-shaped intermediate support column that is nested, a core support column that is held in the intermediate support column, and support column drive means that moves the core support column in the axial direction. It is good to have one.

Further, the cleaning brush has a pressure sensor capable of coming into contact with the inner wall of the dome, and the strut driving means is controlled based on a detection signal of the sensor to control the contact pressure between the cleaning brush and the dome. Is preferably configured to be constant.

Further, the cleaning brush may be attached to one end of the support via a swing joint.

Further, the cleaning brush may further have a hole for ejecting a liquid, and liquid supply means for supplying the liquid to the cleaning brush may be provided.

The base and the rotary table are
It may be formed in a ring shape, and the other end side of the pillar may be bent upward from the axial direction of the one end side of the pillar.

Further, the counterweight may be provided with an adjusting mechanism capable of adjusting the balance of the columns according to the movement amount of the core column moved by the column driving means.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view showing the relationship between the dome inner wall cleaning device 1 and the dome 20 according to the first embodiment of the present invention.
The dome inner wall cleaning device 1 includes a rotary table 4 that rotates substantially horizontally on a table base 2 that is installed near the center of the dome 20, and a column support 6 that is provided substantially vertically on the rotary table 4. A support 12 pivotally supported on a fulcrum 7 of the support 12 and rotatable in a substantially vertical direction, a cleaning brush 17 provided at one end of the support 12, and a counterweight 16 provided at the other end of the support 12. , A vacuum device 18 connected to the cleaning brush 17 via a vacuum hose 19, and a rotary table 4 provided on the table base 2.
Table rotation motor 5 for rotating the table, and rotation table 4
A cylinder drive motor 10 is provided which is provided above and rotates the column 12 in the vertical direction. The table base 2 is arranged so that the axis of the rotary shaft 4a of the rotary table 4 intersects the center line of the column 12 and the axis of the fulcrum 7 and coincides with the center of the dome 20. The length is matched with the radius of the dome 20.

The rotary table 4 is provided with an index such as a magnet for indicating the starting point of rotation. On the other hand, the table base 2 is provided with means for detecting an index, such as a hall element. This Hall element outputs a signal for setting the column 12 to the next elevation angle when detecting one rotation of the turntable 4. As a result, when the rotary table 4 is rotated, the inner peripheral portion of the inner wall 20a of the dome 20 that contacts the cleaning brush 17 is cleaned in a strip shape,
Every time the index is detected, the angle of the column 12, that is, the elevation angle is sequentially changed and the rotary table 4 is rotated to clean the entire inner wall 20a of the dome 20 in a short time.

In FIG. 1, a column 12 includes a column base 13a supported by a column support 6 at a fulcrum 7, an intermediate column 13b connected to the column base 13a, and a core column 1.
4, the intermediate support column 13b is pipe-shaped, and is of a nested type that holds the core support column 14 movably in its axial direction. In addition, a counterweight 1 for balancing the left and right balance of the support column 12 is provided on the support base 13a.
6 is provided. In this embodiment, as a mechanism for moving the core support 14, a rack (not shown) is provided on the upper surface of the core support 14, the support drive motor 15 is attached to the intermediate support 13b, and the pinion of the support drive motor 15 is attached. The core support 14 is driven by being engaged with a rack provided on the upper surface of the core support 14. Further, the relationship between the table base 2 and the rotary table 4 may be just a structure like a thrust bearing, and another structure may be used as long as the rotary table 4 can smoothly rotate on the table base 2.

The rotary table 4 is rotatably supported on the table base 2 about a rotary shaft 4a. Although not shown, a gear is formed on the peripheral surface of the rotary table 4, The pinion of the table rotation motor 5 is meshed with this gear. Further, the rotation of the boom 12 in the vertical direction (vertical direction) is performed by the cylinder drive motor 1 attached to the motor bracket 11 of the rotary table 4.
This is performed by driving the support shaft rotation cylinder 9 to expand and contract by 0 and rotate the support shaft rotation lever 8 attached to the fulcrum 7.

A vacuum device 18 is also mounted on the rotary table 4, and is configured to collect dust and the like from the cleaning brush 17 via the vacuum hose 19. The cylinder drive motor 1 on the rotary table 4
Power may be supplied to the strut drive motor 15 and the vacuum device 18 from the outside via a slip ring (not shown) provided on the rotary shaft 4a of the rotary table 4. The legs 3 of the table base 2 are configured so that the length and the angle can be adjusted, and the dome inner wall cleaning device can be arranged in accordance with the dome 20.

When the dome inner wall cleaning device 1 is placed, if anchors are buried in the floor surface and the legs 3 are fixed, the safety is further enhanced, and the dome inner wall cleaning device 1 will be used at the next work. Can be placed quickly. The length of the support column 12 may be changed by changing the intermediate support column 13b to a different length according to the size of the dome 20 or inserting an extension support column (not shown) between the support column base 13a and the intermediate support column 13b. Can be changed significantly. In consideration of handling at the time of transportation, the column 12 is configured such that the flanges at the ends of the column base 13a and the intermediate column 13b are connected by bolts. With the provision of, it is possible to easily attach / detach this extension column and easily change the total length of the column 12.

FIG. 2 is a sectional view showing the details of the cleaning brush 17 of one embodiment. The cleaning brush 17 is attached to the tip of the core strut 14 (FIG. 1) while allowing some rotation about the fulcrum 23a of the swing joint 23.
Also, the vacuum hole 2 communicating with the vacuum hose 19
2 are provided, and dust collected by the movement of the brush 21 is collected from the vacuum hole 22 to the vacuum hose 1
9 through the vacuum device 18 (FIG. 1). The swing joint 23 may not only rotate in one direction but may freely swing like a universal joint.
May be provided with an initial mechanism for pre-energizing the position.

By attaching the pressure sensor 24 to the cleaning brush 17 at the substantially central portion thereof, the contact pressure between the brush 21 and the wall surface can be detected. In this embodiment, the ball 25 is rotatably held at the tip of the ball support rod 26 biased by the spring 28 in the sleeve 27,
The displacement of the ball support rod 26 is electrically detected by pressing the ball 25 against the wall surface by the urging force of the spring 28. That is, a slider type variable resistance sliding terminal is connected near the other end of the ball support rod 26, and the output of the amplifier driving the strut drive motor 15 is increased or decreased based on this displacement amount to move the core strut 14. Have control.

FIG. 3 shows an example in which the dome inner wall cleaning device 1 of the first embodiment is used for cleaning the inner wall 20a of the planetarium dome 20. In this case, the planetarium device 31 is usually located on the planetarium device mounting table 32 at the center position of the dome 20, and the dome inner wall cleaning device 1 cannot be placed at the center position of the dome 20 as it is. Therefore,
A scaffold 35 is provided around the planetarium device mounting table 32, and the dome inner wall cleaning device 1 is arranged on the scaffold 35. For safety, it is desirable that an anchor for fixing the scaffold 35 to the floor surface is embedded in the floor surface, and the scaffold 35 and the leg 3 of the dome inner wall cleaning device 1 are connected by bolts or the like. Further, when the planetarium device 31 is very large, the planetarium device 31 is removed from the planetarium device mounting table 32 and the dome inner wall cleaning device 1 is arranged.

In the case shown in FIG. 3, the vertical axis of the rotary table 4 can be aligned with the vertical axis of the dome 20, but the center point (fulcrum 7) of the column 12 in the elevation angle direction is the center of the dome 20. Formed above and cannot be aligned. For example, assume that the cleaning brush 17 rotates clockwise to clean the inner peripheral portion of the dome 20 at a certain height. Next, when the column 12 is raised to the next elevation angle, the distance from the fulcrum 7 to the inner wall 20a is shortened, so that the pressure sensor 24 (ball support rod 26) is contracted, whereby the sliding terminal of the variable resistor is Move in the direction of lower resistance.
Based on this amount of movement, the strut drive motor 15 is normally rotated to retract the core strut, and the ball support rod 26 of the pressure sensor 24 is controlled so as to come to a substantially intermediate position. The pressure is adjusted optimally.

In another embodiment, the resistance value is the voltage applied to the sliding terminal, which constitutes the window comparator 2.
Is input to two comparators, so that when the resistance value falls below a predetermined value, one comparator turns on,
It drives a relay that causes the strut drive motor 15 to rotate normally. As a result, at the same time when the core support 14 is retracted, the ball support rod 26 of the pressure sensor 24 is returned to the substantially intermediate position, at which time the comparator is turned off, and the support drive motor 15 is stopped. Therefore, the contact pressure with the inner wall 20a of the dome 20 is kept substantially constant.

When the support 12 is controlled to move as described above, by providing the cleaning brush 17 with the swing joint 23 (FIG. 2), the support 12 moves the cleaning brush 17 to any position on the inner wall 20a of the dome 20. Even this cleaning brush 1
7 can be made to follow the inner wall 20a, and the inner wall 20 can be reliably
Cleaning of a can be performed.

Further, since the contact pressure between the cleaning brush 17 and the inner wall 20a can be detected and the length of the column 12 can be controlled so as to optimize these contact pressures, the dome inner wall cleaning device 1 is arranged. In doing so, the inner wall 20a of the dome 20 can be reliably cleaned even if the dome 20 is arranged with some error, and therefore the dome inner wall cleaning device 1 is not required to be arranged as a preparation before cleaning. Therefore, the cleaning work can be completed even in a short time such as a holiday of the planetarium or after the end of business until before the start of business on the next day.

FIG. 4 is a front view of a cleaning brush 17 according to another embodiment. The cleaning brush 17 has an inner ring brush 42 and an outer ring brush 44 having bristles planted at the roots thereof.
A spray nozzle 41 is arranged at the root of the inside, and a vacuum hole 43 is arranged at the root between the inner ring brush 42 and the outer ring brush 44. In this case, a pump for supplying a liquid such as a detergent is placed on the rotary table 4 (FIG. 1), and the detergent is sprayed from the spray nozzle 41.

In the cleaning brush 17 shown in FIG. 4, by making the bristles density of the outer ring brush 44 higher than the bristles density of the inner ring brush 42, the airtightness of the inner space of the outer ring brush 44 can be increased and the spray nozzle 41 The sprayed detergent or the like is not sucked from the vacuum hole 43, the liquid does not drip from the cleaning brush 17 to the outside, and the floor surface in the dome 20 can be worked without being soiled with the detergent or the like. There is no need for preparation such as covering the surface.

The embodiments of the present invention have been described above.
The present invention is not limited to the above-described embodiments, but can be used in various modifications and various applications.

For example, the rotary table does not always rotate continuously, but a stopper is provided at a position corresponding to the index position, and a cushioning material is provided at the position of the table base that abuts against this stopper. Limit switches that operate by contact with stoppers are provided at both ends of
The rotation direction may be reversed after the rotation of about 360 °. With this configuration, power can be supplied to the vacuum device and the like without using the slip ring.

If a conductive brush is used as the cleaning brush, the electric charge can be removed from the dust attached to the wall by charging, and the dust can be easily sucked.

Further, the counterweight for balancing the support column is provided with a movable auxiliary weight like the counterweight of the tone arm of the record player, and the balance adjustment is performed manually or in conjunction with the adjustment of the length of the support column. May be performed. It should be noted that some weights may be detachably configured like a weight lifting barbell.

Further, if the table base and the rotary table are formed in a ring shape, even if there are some obstacles, the dome inner wall cleaning device can be installed so as to straddle these obstacles. The adjustment can be kept to a minimum. In this case, when one end of the column is lifted vertically, the other end of the column comes directly underneath and interferes with an obstacle. Therefore, bend the other end of the column upward by 135 ° with respect to the one end. You should avoid interference with things. Furthermore, if a transparent hemispherical cover is attached to a ring-shaped base or a rotary table, an obstacle straddling this device can be protected.

Further, if a limit switch for detecting the contact with the above-mentioned hemispherical cover is provided on the other end side of the column, the safety is extremely improved.

As a mechanism for rotating the support column in the vertical direction, an arc gear is fixed near the fulcrum of the support column, and a gear attached to the output shaft of the motor is meshed with this gear to rotate the support column. You may do it.

[0034]

Since the present invention is constructed as described above, the cleaning work can be carried out safely in a short time, and the cost required for the cleaning work can be greatly reduced.

Further, since the length of the boom to which the cleaning brush is attached can be adjusted, one device can be applied to domes of various sizes.

Further, if the length of the boom is automatically adjusted, the cleaning brush can be surely made to correspond to the inner wall and cleaning can be performed almost automatically even if the arrangement accuracy of the device is somewhat poor. it can.

If the cleaning brush has a double structure, a spray nozzle for spraying a liquid is provided inside the inner brush, and a vacuum hole is provided between the inner brush and the outer brush, a strong cleaning effect can be obtained. The liquid can be prevented from flowing out from the cleaning brush while exhibiting the above, and cleaning can be easily performed without being bothered by the preparation.

[Brief description of drawings]

FIG. 1 is a schematic view showing a relationship between a dome inner wall cleaning device 1 and a dome 20 according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing details of a cleaning brush used in the apparatus of FIG.

FIG. 3 is a schematic view showing an example in which the dome inner wall cleaning device shown in FIG. 1 is used to clean the inner wall of a planetarium dome.

FIG. 4 is a front view of a cleaning brush of another embodiment.

[Explanation of symbols]

 1 dome inner wall cleaning device 2 table base 4 rotary table 5 table rotary motor 10 cylinder drive motor 12 support 13a support base 13b intermediate support 14 core support 15 support drive motor 17 cleaning brush 18 vacuum device 23 swing joint 24 pressure sensor 41 spray nozzle

Claims (7)

[Claims] 1. A base having a ring-shaped guide rail which is installed near the center of a substantially hemispherical dome, a rotary table which rotates substantially horizontally on the rail of the base, and a rotary table on the rotary table. A pillar that is pivotally supported by a provided support part and can rotate in a substantially vertical direction, a cleaning brush provided on one end side of this pillar, a counterweight provided on the other end side of this pillar, and this cleaning A vacuum device connected to the brush via a pipe; a rotation drive unit provided on the base for rotating the rotary table; and a rotation device provided on the rotary table for rotating the support column in the vertical direction. A dome inner wall cleaning device having a dynamic drive means. 2. The strut includes a pipe-shaped intermediate strut that is nested, a core strut held in the intermediate strut, and strut driving means for moving the core strut in the axial direction. The dome inner wall cleaning device according to claim 1. 3. The cleaning brush has a pressure sensor capable of contacting the inner wall of the dome, and controls the strut driving means based on a detection signal of the sensor to make contact pressure between the cleaning brush and the dome. The dome inner wall cleaning device according to claim 2, wherein the dome inner wall cleaning device is configured to be constant. 4. The dome inner wall cleaning device according to claim 1, wherein the cleaning brush is attached to one end of the column through a swing joint. 5. The dome inner wall cleaning device according to claim 1, wherein the cleaning brush further has a hole for ejecting a liquid, and a liquid supply means for supplying the liquid to the cleaning brush is provided. 6. The base and the rotary table are formed in a ring shape, and the other end of the column is bent upward from the axial direction of one end of the column. 3,
The dome inner wall cleaning device according to 4 or 5. 7. The dome inner wall cleaning device according to claim 2, wherein the counterweight has an adjusting mechanism capable of adjusting the balance of the support pillars according to the moving amount of the core support pillars moved by the support pillar driving means. .