JPS6120291B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety device for an automatic cleaning device that cleans the outer wall surface of a building, particularly the outer wall surface of a building where the cleaning surface is set back from the non-cleaning surface.

This type of automatic cleaning device has a moving body suspended by a wire rope from a hoist installed on the roof of a building, and the moving body is guided by guide rails installed at equal intervals in the vertical direction of the building's exterior wall. ,
It is possible to go up and down along the outer wall of the building.

In addition, since the cleaning surface is set back from the non-cleaning surface, when performing cleaning work on the cleaning surface, move the cleaning head forward, and when passing the non-cleaning surface, move the cleaning head so that it does not come into contact with the non-cleaning surface. need to be retreated. Additionally, cleaning work is generally performed downward from the upper limit position of the cleaning surface, and a first detector installed on the moving body or cleaning head detects the upper limit of the cleaning surface, moves the cleaning head forward, and lowers the cleaning surface. A second detector provided on the movable body or the cleaning head detects the lower limit of the cleaning surface and moves the cleaning head backward. The back and forth movement of the cleaning head may be performed while the movable body continues to descend, or may be carried out while the movable body has stopped descending, but in either case, the second detector If the operation is delayed, the cleaning head may come into contact with the protrusion at the bottom of the lower limit of the cleaning surface. Additionally, if a strong wind blows while the cleaning head is near the upper limit of the cleaning surface, the wire rope suspending the moving object will bend into a bow, lifting the moving object upwards and allowing the cleaning head to clean. It may come into contact with the protrusion at the top of the upper limit of the surface. Moreover, especially in the latter case, when the movable body stops after being detected by the second detector, vibration may occur in the vertical direction and the cleaning head may repeatedly come into contact with the protrusion at the bottom of the lower cleaning limit. There was a fear that the cleaning head and the building wall would be damaged due to the above-mentioned contact.

This invention solves the above-mentioned drawbacks, and is an automatic cleaning device that can minimize the external force even if the cleaning head receives an external force in the direction of its movement, and can prevent damage due to contact. The purpose is to provide

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

In the figure, 1 is a moving body suspended from a hoist (not shown) installed on the roof of a building by a wire rope 2 and a hanging hand 3, and 4 is a cleaning device equipped with a cleaning plate 5, a brush 6, and a cleaning liquid nozzle 7. 8 is a support fixed to the movable body 1; 9 is a cleaning head 4;
10 is a telescopic device pivotally supported between the support metal fittings 8 and 9 (details will be described later);
Numeral 11 is a link pivotally supported between the support fitting 8 and the support fitting 9 like the telescopic device 10, and when no external force is applied, the distance between the pivots of the telescopic device 10 and the distance between the pivots of the link 11 are the same length. be. 12 is a tension spring, and 13 is a turnbuckle, both of which are connected and pivotally supported between a support fitting 14 fixed to the movable body 1 and a support fitting 15 fixed to the cleaning head 4. 16 is pivotally supported between the support metal fitting 15 and the support metal fitting 17 fixed to the movable body 1, and is connected to the cleaning head 4.
A power cylinder 18 is provided on the upper surface of the cleaning head 4 and detects the upper limit of the cleaning surface and issues a signal to advance the cleaning head 4. 19 is provided on the lower surface of the cleaning head 4. This is a second detector that detects the lower limit of the cleaning surface and generates a signal for retracting the cleaning head 4.

In FIG. 2, 10a is a pipe whose end is pivotally supported by the support fitting 9, 10b is a compression spring housed in this pipe 10a, 10c is a screw for adjusting the tension of this compression spring 10b, and 10d is a support fitting 8. A pull rod screwed into a connecting fitting 10e pivotally supported on the
10f is the head of this pull rod 10d, 10g is a hole in the pipe 10a, and when the telescoping device 10 is retracted, the head 10f of the pull rod moves in this hole 10g.

3 to 6, 20 is a wall surface of a building that does not require cleaning, 20a is a lower part of the wall surface 20, 20b is also an upper part, and 21 is a window glass located at a position set back from the wall surface 20.

FIG. 3 shows the cleaning head 4 in the retracted position.
A state in which the moving body 1 is descending is shown.

That is, as the moving body 1 descends, the first detector 1
8 detects the lower wall surface 20a, the cleaning head 4 moves forward by driving the power cylinder 16, and as the movable body 1 descends, the cleaning work of the window glass 21 is performed as shown in FIG. Note that when the cleaning head 4 is moved forward, the telescopic device 10 and the link 1
Reference numeral 1 constitutes a parallel link mechanism, and the cleaning head 4 moves forward in a circular arc while remaining horizontal. Also, as the moving body 1 descends, the second detector 1
9 detects the upper part 20b of the wall surface one floor below, and the power cylinder 16 is driven to cause the cleaning head 4 to retreat in a circular arc.

FIG. 5 shows that when the first detector 18 detects the lower part of the wall 20a and the cleaning head 4 moves forward, the wire rope 2 is blown by the wind, the movable body 1 is pulled upward, and the cleaning head 4 is moved forward. Lower wall 20a
Shows where it came in contact with. At this time, compression spring 1
0b is compressed by the tension rod 10d, the telescoping device 10 is extended, and the cleaning head 4 is now tilted downward to the left in the figure.

FIG. 6 shows a situation where the second detector is delayed in detecting the upper part 20b of the wall surface, the backward movement of the cleaning head 4 is delayed, and the cleaning head 4 comes into contact with the upper part 20b of the wall surface. At this time, the head 10f of the pull rod of the telescoping device 10 moves through the hole 10g, so that the telescoping device 10 is retracted and the cleaning head 4
is tilted upward to the left in the figure.

Therefore, the external force that the cleaning head 4 receives from the lower part 20a or the upper part 20b of the wall surface is determined by the load required to extend and retract the telescoping device 10, and when the cleaning head 4 is tilted during normal cleaning, the value of the load is By adjusting it to a minimum value, the above external force can be minimized.

The tension spring 12 shown in the figure is used to adjust the magnitude of the external force that the cleaning head 4 receives in the state shown in FIG. 6, and the tension of the tension spring 12 can be increased by adjusting the turnbuckle 13. For example, the value of the external force can be adjusted to a small value.

In this embodiment, it is also possible to easily implement an air spring formed by an air cylinder as the telescoping device 10, and the same effect can be obtained even in this case.

Figure 7 shows another embodiment of the telescoping device of the present invention, which is configured so that no displacement occurs in the tensile direction, and due to the shape of the building, only the direction of the external force shown in Figure 6 is considered. It is effective when it is appropriate.

Furthermore, in the embodiment, the telescoping device 10 is located closer to the cleaning head 4, but the mounting positions of the telescoping device 10 and the link 11 can be easily reversed, and the same effect can be achieved even in this case. effect can be obtained. However, the expansion/contraction device in this case may have a characteristic of contracting when a load exceeds a predetermined value.

As explained above, the present invention allows the support fitting arranged perpendicular to the cleaning surface of the cleaning head, and the member that forms the main part of the movable body and is arranged parallel to the support fitting, to move forward and backward with respect to the cleaning surface. The cleaning head is connected by two links spaced apart and parallel to each other, and the cleaning head is advanced toward the cleaning surface via the links by means of a power cylinder. The supporting metal fitting is made to be expandable and retractable in response to a load exceeding the specified value, so that the supporting metal fitting rotates when an overload along the vertical direction of the moving body is applied to the cleaning head. This makes it possible to suppress the value of the external force that the cleaning head receives from the direction of movement to a predetermined value or less, and to prevent accidents such as damage due to contact between the cleaning head and the wall surface by using a device that has a simple configuration and can be manufactured at low cost. can be prevented from occurring.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the safety device of an automatic cleaning device according to the present invention, Fig. 2 is a sectional view taken along the line - - in Fig. 1, and Figs. 3 to 6 explain the operation of Fig. 1. FIG. 7 is a vertical cross-sectional view showing another embodiment of the telescopic device shown in FIG. 2, and is a view corresponding to FIG. 2. 1... Mobile object, 4... Cleaning head, 8, 9...
Supporting metal fittings, 10... Telescopic device, 11... Link,
12... tension spring, 16... power cylinder,
20...Building wall, 21...Window glass. In addition,
Identical parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A movable body that moves up and down along the cleaning surface, a cleaning head that is provided with a support fitting arranged perpendicular to the cleaning surface and is held by the movable body to clean the cleaning surface, and the main components of the movable body. two links, one end of which is pivotally supported by a member provided parallel to the support metal fitting, the other end of which is pivotally supported by the support metal fitting, and which are spaced apart from each other in the front and rear directions with respect to the cleaning surface and are arranged parallel to each other; The cleaning head is coupled to the movable body by means of a power cylinder, and the cleaning head is moved toward the cleaning surface by a power cylinder provided on the movable body through the movement of the link during the cleaning. wherein at least one of the links is configured via a telescoping device that expands or contracts in response to a load greater than a predetermined value, and when an overload is applied to the cleaning head in the vertical direction of the movable body, the A safety device for an automatic cleaning device, characterized in that the support metal is rotatable.